JP6992863B2 - Projection device, adjustment support method and program - Google Patents

Description

The present invention relates to a projection device , an adjustment support method and a program.

Generally, in an image display device (for example, a projector) using a wheel such as a color wheel or a phosphor wheel, the rotation position of the wheel that separates the color of the light incident from the light source is detected, and a DMD (Digital Micromirror Device) is detected. It is necessary to perform synchronous control with a modulation element such as. If this synchronization control is inappropriate, problems such as color mixing may occur in the displayed image.

As a technique for performing synchronous control, a technique using a wheel rotation position detection signal (index signal) is widely used. In the technology using the index signal, the rotation position detection mark provided on the rotating part of the wheel is detected by using a reflection type photo interrupter (index sensor), and the index signal generated based on the detection timing is used. Synchronous control can be realized.

However, in order to accurately perform synchronization control using the index signal, it is necessary that the mounting state of the wheel and the motor that drives it and the position where the rotation position detection mark is affixed are appropriate.

However, in the manufacturing process of the image display device, the wheel may be attached and the rotation position detection mark may be attached manually. If these operations are performed manually, an error such as a positional deviation will inevitably occur, and as a result, the timing of the index signal will be displaced. Therefore, it is necessary to adjust the synchronization timing between the index signal of the wheel and the transmitted light for each product (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-3213

As described above, there are many cases where the timing is manually adjusted while referring to the adjustment image for adjustment so that color mixing or the like does not occur in the projected image. However, since it is difficult to provide an adjustment image for easy adjustment, there are problems that the adjustment accuracy of the index signal timing becomes low and the quality is not stable due to the variation in the skill of the operator. rice field.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique for generating an adjustment image for easily adjusting the timing of an index signal.

In order to achieve the above object, the projection device according to the present invention is configured to rotate about a predetermined axis and is arranged on an optical path of light emitted from a predetermined light source, thereby. A wheel whose area to be irradiated with the light changes with rotation about the axis of the wheel, and the wheel so that a predetermined image pattern is formed on the projection surface by the light from the light source through the wheel. The wheel comprises a display element that spatially modulates the light from the light source via the light source based on a predetermined image signal, and the wheel has a region to which the light is irradiated, and the irradiated light is the first. A projection device that is divided into a first adjustment region emitted by light of a color component and a second adjustment region emitted by light of a second color component different from the first color component. When an adjustment image having a first color arrangement area, a second color arrangement area, a third color arrangement area, and a fourth color arrangement area is projected as the predetermined image pattern, the first color arrangement area is used. The first color component is formed by light emitted from a region of the first adjustment region adjacent to the boundary with the second adjustment region, and the second color arrangement region is formed. The second color component is formed by light emitted from a region of the second adjustment region adjacent to the boundary with the first adjustment region, and the third color arrangement region is formed. The first color component is formed by light emitted from a region of the first adjustment region that is distant from the boundary with the second adjustment region, and the fourth color distribution region is formed. Control to control the wheel and the display element so that the second color component is formed by light emitted from a region of the second adjustment region that is distant from the boundary with the first adjustment region. The first color arrangement region is provided with means, and the region shape is set so as to correspond to one half circle of two half circles obtained by dividing a circle into two equal parts by a predetermined straight line, and the second color arrangement region is provided. The region is set so that the region shape corresponds to the other half circle of the two half circles, and the third color arrangement region has a predetermined region shape including the circle in the region. The fourth color region is set so as to correspond to the portion where the one half circle is removed from one of the two half rectangles divided into two equal parts by the straight line of the above. The image signal for the adjustment image is set to correspond to the portion of the two semi-rectangles from which the other half-circle is removed, and the image signal for the adjustment image is the first color region and the said. Third The luminance gradation with respect to the first color component is set to be different from the color arrangement area by one gradation, and between the second color arrangement area and the fourth color arrangement area. It is characterized in that the luminance gradation with respect to the second color component is set so as to be different by one gradation .
Further, the adjustment support method according to the present invention is configured to rotate about a predetermined axis and is arranged on an optical path of light emitted from a predetermined light source so as to be centered on the predetermined axis. The wheel via the wheel so that a predetermined image pattern is formed on the projection surface by the light from the light source via the wheel and the wheel in which the area to be irradiated with the light changes with the rotation. A display element that spatially modulates the light from the light source based on a predetermined image signal is provided, and the wheel has a region to be irradiated with the light, and the irradiated light is the light of the first color component. It is an adjustment support method executed by a projection device that is divided into a first adjustment region emitted by the above and a second adjustment region emitted by light of a second color component different from the first color component. When the adjustment image having the first color arrangement area, the second color arrangement area, the third color arrangement area, and the fourth color arrangement area is projected as the predetermined image pattern, the first color arrangement area is projected. However, the first color component is formed by the light emitted from the region of the first adjustment region adjacent to the boundary with the second adjustment region, and the second color arrangement region is formed. However, the second color component is formed by the light emitted from the region of the second adjustment region adjacent to the boundary with the first adjustment region, and the third color arrangement region is formed. However, the first color component is formed by light emitted from a region of the first adjustment region that is distant from the boundary with the second adjustment region, and the fourth color arrangement region is formed. However, the wheel and the display element are controlled so that the second color component is formed by light emitted from a region of the second adjustment region that is distant from the boundary with the first adjustment region. The first color arrangement region is set so that the region shape corresponds to one half circle of two half circles obtained by dividing the circle into two equal parts by a predetermined straight line. The color arrangement region of is set so that the region shape corresponds to the other half circle of the two half circles, and the third color arrangement region is a rectangle whose region shape includes the circle in the region. It is set so as to correspond to the portion where the one half circle is removed from one of the two half rectangles divided into two equal parts by the predetermined straight line, and the fourth color arrangement region has a region shape. , The image signal for the adjustment image is set to correspond to the portion of the two semi-rectangles from which the other half-circle is removed, and the first color arrangement region is used. And before The luminance gradation with respect to the first color component is set to be different by one gradation from the third color scheme region, and the second color scheme region and the fourth color scheme are set. It is characterized in that the luminance gradation with respect to the second color component is set so as to be different from the region by one gradation.
Further, the program according to the present invention is configured to rotate around a predetermined axis and is arranged on an optical path of light emitted from a predetermined light source so as to be centered on the predetermined axis. From the light source via the wheel so that a predetermined image pattern is formed on the projection surface by the wheel whose area to be irradiated with the light changes with rotation and the light from the light source via the wheel. The wheel comprises a display element that spatially modulates the light of the above based on a predetermined image signal, and the wheel emits the irradiated region with the light of the first color component. The computer of the projection device, which is divided into the first adjustment area to be adjusted and the second adjustment area emitted by the light of the second color component different from the first color component , is referred to as the first color arrangement area. When an adjustment image having a second color arrangement area, a third color arrangement area, and a fourth color arrangement area is projected as the predetermined image pattern, the first color arrangement area is the first color component. The second color component is formed so as to be formed by light emitted from a region of the first adjustment region adjacent to the boundary with the second adjustment region, and the second color distribution region is the second color component. The third color component is formed so as to be formed by light emitted from a region of the second adjustment region adjacent to the boundary with the first adjustment region, and the third color distribution region is the first color component. The fourth color component is formed by light emitted from a region of the first adjustment region that is distant from the boundary with the second adjustment region, and the fourth color component is the second color component. Is to function as a control means for controlling the wheel and the display element so as to be formed by light emitted from a region of the second adjustment region that is distant from the boundary with the first adjustment region. The first color arrangement area is set so that the area shape corresponds to one half circle of two half circles obtained by dividing the circle into two equal parts by a predetermined straight line, and the second color arrangement area corresponds to the area shape. Is set to correspond to the other half circle of the two half circles, and in the third color arrangement region, the region shape is a rectangle including the circle in the region, and the predetermined straight line is the second magnitude. It is set so as to correspond to the portion where the one half circle is removed from one of the two divided half rectangles, and the fourth color arrangement area has the area shape of the two half rectangles. The image signal for the adjustment image is set to correspond to the portion of the other half-rectangle from which the other half-circle is removed, and the image signal for the adjustment image is the first color distribution region and the third. The luminance gradation with respect to the first color component is set to be different from the color arrangement area by one gradation, and between the second color arrangement area and the fourth color arrangement area. It is characterized in that the luminance gradation with respect to the second color component is set so as to be different by one gradation .

According to the present invention, it is possible to provide a technique for generating an adjustment image for easy adjustment.

It is a block diagram which shows the hardware structure of the image display device which concerns on one Embodiment of this invention. Among the functional configurations of the image display device of FIG. 1, it is a functional block diagram which shows the functional configuration for executing a parameter adjustment process. It is a schematic diagram which shows an example of the structure of a wheel. It is a schematic diagram which shows an example of the boundary adjacent section in a wheel. It is a schematic diagram which shows an example of the adjustment image. It is a timing chart which shows an example about reduction of deviation by parameter adjustment. It is a flowchart explaining the flow of the parameter adjustment processing executed by the image display device of FIG. 1 having the functional configuration of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The image display device according to the present invention projects an adjustment image and performs adjustment processing based on the adjustment image.
At this time, the image display device uses a boundary adjacent section called a spoke period, which is located at the boundary between the reflection region and the transmission region of the wheel and is created by the light incident from the light source, in order to match the deviation of the index signal. This is because the color created using this boundary adjacent section includes other colors because the irradiation area of the projected light applied to the wheel exceeds the boundary part even if the index signal is slightly deviated. This is because it is easy to understand that the color of the input image signal and the color of the actually projected image are different. Specifically, the image display device has two colors having one gradation different from each other, and the first color created by using the boundary adjacent section and the color created without using the boundary adjacent section. An adjustment image is generated by arranging a second color whose component is close to the first color so as to form a geometric pattern. Further, the image display device projects the adjustment image.

In this adjustment image, if the color of the boundary adjacent section of the boundary part is correct (that is, there is no deviation of the index signal), the gradation change becomes smooth, so that it looks like nothing at the resolution of the human eye. However, when the color of the section adjacent to the boundary is deviated (that is, the index signal is deviated), the gradation changes rapidly and the geometric pattern emerges.

Therefore, for example, a worker who manually adjusts the index signal can adjust the index delay so that the geometric pattern does not appear, so that the synchronization timing of the index signal can be adjusted exactly. In addition, it is possible to easily determine whether or not adjustment is necessary by checking whether or not the geometric pattern appears before starting the adjustment work.

[Hardware configuration]
FIG. 1 is a block diagram showing a hardware configuration of an image display device 10 according to an embodiment of the present invention.
The image display device 10 is configured as, for example, a projector compliant with a DLP (Digital Light Processing) method.

The image display device 10 includes an input / output connector 11, an input / output interface (I / F) 12, a system bus 13, an image conversion unit 14, a VRAM (Video RAM) 15, a projected image processing unit 16, an audio output unit 17, and projected light. Processing unit 18, projected light generation unit 19, micro mirror element 20, mirror 21, projection lens unit 22, (B emission) semiconductor laser 31, (R emission) LED 32, mirror 33, dichroic mirror 34, color wheel, index sensor 36 , A motor (M) 37, a mirror 38, a mirror 39, a dichroic mirror 40, an integrator 41, a mirror 42, a CPU (Central Processing Unit) 51, a storage unit 52, and an operation unit 53.

Among these parts, the input / output interface (I / F) 12, the system bus 13, the image conversion unit 14, the VRAM (Video RAM) 15, the projected image processing unit 16, the audio output unit 17, the projected light processing unit 18, and the CPU 51. Are connected to each other via the system bus 13 so as to be able to send and receive data.

The input / output connector 11 is a terminal for inputting image data to be projected by the image display device 10 from an external device. The input / output connector 11 is, for example, an HDMI (registered trademark) (High-Definition Multimedia Interface) terminal, a pin jack (RCA) type video input terminal, a D-sub15 type RGB input terminal, and a USB (Universal Serial Bus) connector. It is realized by such as. Further, a removable media 101 made of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like, which stores a program, image data, or the like, is appropriately attached to the input / output connector 11.

The program read from the removable media 101 by the input / output connector 11 is installed in the storage unit 52 as needed. Further, the removable media 101 can also store various data stored in the storage unit 52 in the same manner as the storage unit 52.

Image data conforming to various standards input to the input / output connector 11 is input to the image conversion unit 14 via the input / output interface (referred to as "input / output I / F" in the figure) 12 and the system bus 13. Will be done.

The image conversion unit 14 converts the image data input from the input / output connector 11 into an image signal of a predetermined format suitable for projection. Further, the image conversion unit 14 outputs the converted image signal to the projection image processing unit 16.
The VRAM 15 is a buffer memory for image processing, and is appropriately used as a buffer when an image signal is output from the image conversion unit 14 to the projection image processing unit 16.
At this time, if necessary, data such as symbols indicating various operating states for OSD (On Screen Display) may be superimposed on the image signal by the VRAM 15. In this case, the processed image signal is read out and output to the projection image processing unit 16.

The projection image processing unit 16 is micro by a time division drive obtained by multiplying the frame rate conforming to a predetermined format, the number of divisions of color components, and the number of display gradations according to the image signal input from the image conversion unit 14. The drive of the mirror element 20 is controlled.

The micromirror element 20 is a spatial light modulation element driven under the control of the projection image processing unit 16. The micromirror element 20 individually turns on / off each tilt angle of a plurality of micromirrors corresponding to a plurality of pixels arranged in an array (for example, 1024 pixels in the horizontal direction × 768 pixels in the vertical direction corresponding to XGA) at high speed. Switch. In this way, the micromirror element 20 switches on / off at high speed, and forms an optical image corresponding to the image signal by the reflected light emitted to the projection lens unit 22 when the micromirror element 20 is turned on.

On the other hand, the primary color light of R (Red), G (Green), and B (Blue) is periodically emitted from the projected light generation unit 19 in a time-division manner. The primary color light from the projected light generation unit 19 is totally reflected by the mirror 21 and irradiated to the micromirror element 20.
By adjusting the time during which the micromirror element 20 is on for a predetermined period determined for each of the RGB primary color lights incident on the micromirror element 20, the color component corresponding to the input image signal can be obtained. Adjust the color so that it becomes.

Then, an optical image is formed by the reflected light of the micromirror element 20, and the formed optical image is projected and displayed on a screen (not shown) to be projected via the projection lens unit 22.

The projected light generation unit 19 includes two types of light sources. Specifically, it has a semiconductor laser 31 that emits blue laser light and an LED 32 that emits red light. The letters R, G, and B shown together with the arrows in the projected light generation unit 19 in the drawing and the arrows represent the color of the laser beam (any of RGB) and the traveling direction of the laser beam.

The blue laser beam emitted by the semiconductor laser 31 is totally reflected by the mirror 33, then passes through the dichroic mirror 34, and is irradiated to one point on the circumference of the wheel 35. The wheel 35 is composed of an annular member and is basically rotated at a constant speed by a motor 37. A transmission region that transmits light and a reflection region that reflects light are provided on the circumference of the wheel 35 that is irradiated with the laser beam. This region that transmits light has a function as a diffuser that diffuses light. Further, a fluorescent paint is applied to the reflective region that reflects light, and it has a function as a green fluorescent reflector. A more specific configuration of the wheel 35 will be described later with reference to FIG.

When the transmission region of the wheel 35 is in the irradiation position of the laser light, the laser light is transmitted through the wheel 35 while being diffused in this transmission region, and then totally reflected by the mirror 38 and the mirror 39, respectively. After that, this blue light passes through the dichroic mirror 40, is made into a luminous flux having a substantially uniform luminance distribution by the integrator 41, is totally reflected by the mirror 42, and is sent to the mirror 21.

When the reflection region of the wheel 35 is in the irradiation position of the laser light, the green light is excited by the irradiation of the laser light, the excited green light is reflected by the wheel 35, and then reflected by the dichroic mirror 34. After that, this green light is further reflected by the dichroic mirror 40, and after the luminance distribution is made a substantially uniform luminous flux by the integrator 41, it is totally reflected by the mirror 42 and sent to the mirror 21.

Further, the red light emitted by the LED 32 is transmitted through the dichroic mirror 34 and then reflected by the dichroic mirror 40, and is totally reflected by the mirror 42 after the brightness distribution is made to be a substantially uniform light beam by the integrator 41. It is sent to 21.

As described above, the dichroic mirror 34 has a spectral characteristic of transmitting green light while transmitting blue light and red light. Further, the dichroic mirror 40 has a spectral characteristic of reflecting red light and green light while transmitting blue light.

In addition, the index sensor 36 is arranged at a position where the rotation position detection mark provided on the rotation portion of the wheel can be detected. The index sensor 36 is realized by a reflective photointerruptor and generates an index signal indicating the detection timing of the rotation position detection mark. Then, the index sensor 36 outputs the generated index signal to the projected light processing unit 18.

Further, an optical sensor (not shown) is arranged toward the emitted light side of the integrator 41. This optical sensor detects only the brightness regardless of the color of the light. The luminance information detected by the optical sensor is output to the projected light processing unit 18.

The projected light processing unit 18 is based on the timing signal in the image signal input from the projected image processing unit 16, the index signal input from the index sensor 36, the luminance information input from the optical sensor, and the like, and the projected light described above. The generation unit 19 controls each light emission timing and light emission intensity of the semiconductor laser 31 and LED 32, rotation of the wheel 35 by the motor 37, and the like. The control by the projected light processing unit 18 is performed based on the integrated control by the CPU 51 described later.

The CPU 51 collectively controls all the operations of each of the above circuits. For such integrated control, the storage unit 52 has a ROM (Read Only Memory) and a RAM (Random Access Memory). And semiconductor memory such as DRAM (Dynamic Random Access Memory).

These semiconductor memories included in the storage unit 52 include the LED 32 and the semiconductor laser 31 at the time of each emission of R, G, and B in a state where the white balance at the time of shipment from the factory is maintained, in addition to the operation program and various standard data. Each drive current value is stored as a rated current value. Further, as will be described later with reference to FIG. 1, the storage unit 52 is provided with an index parameter storage unit which is a set value for performing control based on the index signal.

The CPU 51 executes various processes according to the program recorded in the ROM or the program loaded from the DRAM into the RAM. Data and the like necessary for the CPU 51 to execute various processes are also appropriately stored in the RAM.

The CPU 51 executes various projection operations and index parameter adjustment operations according to the operation signal, which is a signal based on the key operation from the user received by the operation unit 53.
The operation unit 53 includes a key operation unit provided on the main body of the image display device 10 and a laser light receiving unit that receives infrared light between a remote controller (not shown) dedicated to the image display device 10, and the user can use the main body. The key operation signal based on the key operated by the key operation unit or the remote controller of is directly output to the CPU 51.

The operation unit 53 includes, for example, a focus adjustment key, a zoom adjustment key, an input switching key, a menu key, a cursor key, a set key, a cancel key, and the like together with the key operation unit and the remote controller.

The CPU 51 also targets the voice output unit 17 for integrated control. The voice output unit 17 includes a sound source circuit such as a PCM sound source, and analogizes the voice data given from the CPU 51 during the projection operation. Further, the voice output unit 17 drives an internal speaker unit to emit a loudspeaker, or generate a beep sound or the like if necessary.

[Functional configuration]
FIG. 2 is a functional block diagram showing a functional configuration for executing a parameter adjustment process among the functional configurations of the image display device 10 of FIG. 1.
The parameter adjustment process is a series of processes for adjusting an index parameter by generating and projecting an adjustment image and adjusting the index parameter according to an operation from a user who has referred to the adjustment image.

When the parameter adjustment process is executed, as shown in FIG. 2, the mode determination unit 61, the adjustment image generation unit 62, the projection unit 63, and the parameter adjustment unit 64 function in the CPU 51.
Further, an index parameter storage unit 71 is set in one area of the storage unit 52.

The mode determination unit 61 determines whether or not an operation instructing the start of index parameter adjustment from the user has been accepted. Then, when the mode determination unit 61 determines that the operation for instructing the start of index parameter adjustment from the user has been accepted, the mode determination unit 61 switches the operation mode of the image display device 10 to the parameter adjustment mode. As a result, the parameter adjustment process is started.
Further, the mode determination unit 61 determines whether or not an operation for instructing the end of index parameter adjustment from the user has been accepted after the parameter adjustment process has started. Then, when the mode determination unit 61 determines that the operation for instructing the end of the index parameter adjustment from the user has been accepted, the mode determination unit 61 switches the operation mode of the image display device 10 from the parameter adjustment mode to the normal mode. This ends the parameter adjustment process.

The adjustment image generation unit 62 generates an adjustment image.
The projection unit 63 projects the adjustment image generated by the adjustment image generation unit 62 by controlling the projection image processing unit 16 and the projection light processing unit 18.
The parameter adjustment unit 64 adjusts the index parameter according to the operation on the operation unit 53 by the user who has referred to the adjustment image.

The index parameter storage unit 71 stores the index parameter to be adjusted by the parameter adjustment unit 64. As described above, this index parameter is used in the integrated control for image display by the CPU 51.

Next, the adjustment of the index parameter performed in cooperation with each of these functional blocks will be described with reference to FIGS. 3 to 6.
First, the configuration of the wheel 35, which is a prerequisite, will be described with reference to FIG.
The wheel 35 is composed of an annular member and is basically rotated at a constant speed by a motor 37. A transmission region that transmits light and a reflection region that reflects light are provided on the circumference of the wheel 35 that is irradiated with the laser beam. This region that transmits light has a function as a diffuser that diffuses light. Further, a fluorescent paint is applied to the reflective region that reflects light, and it has a function as a green fluorescent reflector.

When the transmission region of the wheel 35 is in the irradiation position of the laser light, the laser light is transmitted through the wheel 35 while being diffused in this transmission region. When the reflection region of the wheel 35 is in the irradiation position of the laser light, the green light is excited by the irradiation of the laser light, and the excited green light is reflected by the wheel 35. The subsequent progress of the transmitted light and the reflected light is as described above with reference to FIG.
As an example, the transmission region of the wheel 35 is set to a range of about 1/4 of the entire circumference, and the reflection region is set to the range of the remaining 3/4 of the entire circumference.

When the image is projected, the motor 37 rotates the wheel 35, and the mirror installed for each pixel in the micromirror element 20 reflects the incident light in the projection direction (the direction in which the output light becomes effective). Each pixel of the projected image is generated by switching between the angle at which the incident light is reflected and the angle at which the incident light is reflected in the direction of the light absorber (the direction in which the output light becomes invalid).

In this case, it is necessary to control the color components of R, G and B, and for G and B, the time during which the blue light source is applied to the transmission region and the reflection region of the wheel 35 is set to turn on / off the micromirror element 20. By controlling, each color component is adjusted. In the present embodiment, the time is controlled so that the blue light source is applied to a part of the region, not the entire region of the transmission region and the reflection region. As an example, as shown in FIG. 3, the time is controlled so that the segment A, which is a part of the transmission region, and the segment B, which is a part of the reflection region, are irradiated with the blue light source.

Here, in order to perform this time control, it is necessary to detect the boundary between the transmission region and the reflection region in the wheel 35 based on the index signal. Therefore, a rotation position detection mark for the index sensor 36 to generate an index signal is attached to a predetermined portion of the wheel 35 (for example, a portion corresponding to the boundary portion between the segment A and the segment B of the wheel 35).
Then, the index sensor 36 detects the rotation position detection mark, and outputs an index signal indicating the detection timing of the rotation position detection mark to the projected light processing unit 18.

The projected light processing unit 18 can recognize whether the transmission region or the reflection region of the wheel 35 is irradiated with the blue light source based on the index signal.
However, when the rotation position detection mark is manually attached as described above, there are variations in the attachment state. Therefore, there is a discrepancy (error) between the index signal output by the index sensor 36 and the timing corresponding to the logical index signal for the projected light processing unit 18 to control the wheel 35. Therefore, the projected light processing unit 18 cannot accurately recognize the position of the boundary between the period functioning as the blue light source and the period functioning as the green light source (that is, the position of the boundary between the segment A and the segment B). It ends up. In addition, there are individual differences in the coating state of the paint at the boundary portion, which also causes an error.

Therefore, in the present embodiment, in order to match the deviation of the index signal, the adjustment image generation unit 62 uses a section near the boundary including the boundary between the segment A and the segment B of the wheel 35 (hereinafter referred to as “boundary adjacent section”). Is used to generate an image for adjustment. This is because the color output using this boundary adjacent section exceeds the boundary even with a slight deviation of the index signal, and the color corresponding to segment A and the color corresponding to segment B (that is, blue light and green light) This is because it is easy to mix.

FIG. 4 shows a schematic diagram when the boundary adjacent section in FIG. 3 is enlarged. The boundary-adjacent section is referred to as a section on the reflection region side adjacent to the boundary (hereinafter referred to as "first boundary adjacent section") and a section on the transmission region side adjacent to the boundary (hereinafter referred to as "second boundary adjacent section"). ) And. This boundary-adjacent section is sometimes called a "bit plane".

As a method for generating an adjustment image, for example, the difference in one gradation of the color scale projected by the image display device 10 is invisible to humans, so that the two colors differ by one gradation, and the boundary adjacent section thereof. By arranging the first color created using the above and the second color created without using this boundary adjacent section and having a color component close to the first color so as to form a geometric pattern. Generate an image for adjustment. When the boundary between the two color regions appears clearly, it corresponds to the index signal output by the index sensor 36 and the color switching signal (logical index signal) for the projected light processing unit 18 to control the wheel 35. It shows that there is a large deviation from the timing. On the other hand, when the boundary between the two color regions does not clearly appear, it means that no deviation has occurred.
Specifically, the micromirror element is controlled, and the first color and the color obtained in the single color region of the segment A (green) and the segment B (blue) and the color obtained in the boundary adjacent section which is the mixed color region thereof are used. Generate image areas of the second color respectively.
At this time, the first color and the second color are set so as to be different by about one gradation in the green and blue components created by using the section adjacent to the boundary.

However, for example, when the adjustment image is generated by the first color that uses the first boundary adjacent section and the second color that does not use the first boundary adjacent section, the index signal may be misaligned. Even if there is, there is a possibility that the boundary between the two color regions will not appear clearly if it is displaced to the side of the section adjacent to the first boundary (that is, the reflection region side). Similarly, when the adjustment image is generated by the first color that uses the second boundary adjacent section and the second color that does not use the second boundary adjacent section, the index signal is misaligned. Even so, if there is a deviation toward the second boundary adjacent section side (that is, the transmission region side), the boundary between the two color regions may not clearly appear.

Therefore, four colors may be selected to generate an adjustment image. FIG. 5 shows an example of an adjustment image generated by selecting four colors. In this example, four colors are selected to generate an adjustment image. Specifically, as shown in FIG. 5, as the colors to be selected, four colors that use or do not use the first boundary adjacent section and the second boundary adjacent section, respectively, and differ by one gradation are selected. To generate an image for adjustment. By doing so, even if the deviation occurs on the first boundary adjacent section side (that is, the reflection region side), the deviation occurs on the second boundary adjacent section side (that is, the transmission region side). Even in this case, the boundary of any color region appears clearly, so that the occurrence of deviation can be grasped more reliably. It is also possible to grasp which side of the first boundary adjacent section side or the second boundary adjacent section side is displaced.

For example, the color gradation (R, G, B) of each region is set to a region (255, 37, 37) that does not use the first boundary adjacent section, and a region (255, 38,) that uses the first boundary adjacent section, respectively. 38), the area where the second boundary adjacent section is not used (255, 52, 52), and the area where the second boundary adjacent section is used (255, 53, 53) may be set. In this case, if there is no deviation in the index signal, the difference between the gradations is sufficiently small, and it is difficult for the user's eyes to recognize the boundary of each color region.

Further, by configuring as described above, even if the parameter for adjusting the delay of the index signal cannot be finely adjusted, the index signal can be generated so that the user cannot recognize the boundaries of the image areas corresponding to the four colors. By adjusting, the deviation of the index signal with respect to the boundary of the actual wheel can be adjusted to the correct position without being biased to either the first adjacent section or the second adjacent section.

However, the color scheme and geometric pattern of the adjustment image shown in FIG. 5 are merely examples, and the color scheme and geometric pattern of the adjustment image generated by the adjustment image generation unit 62 are not limited to the example of FIG.

In any case, when the boundary of the region of different colors for each gradation clearly appears in the adjustment image, the index signal output by the index sensor 36 and the projected light processing unit 18 for controlling the wheel 35. This indicates that there is a large deviation from the timing corresponding to the logical index signal. Therefore, in the present embodiment, the parameter adjusting unit 64 adjusts the index parameter in the direction of reducing the deviation. Here, the index parameter is a parameter for determining the timing corresponding to the logical index signal for controlling the wheel 35 by the projected light processing unit 18.

The adjustment by the parameter adjusting unit 64 will be described with reference to the timing chart of FIG. In FIG. 6, for the “index signal”, the rising edge of the waveform indicates the timing at which the index sensor 36 detects the rotation position detection mark. Further, in the "timing corresponding to the logical index signal in wheel control", the upward arrow indicates the timing corresponding to the logical index signal for the projected light processing unit 18 to control the wheel 35. ..

FIG. 6A shows a state in which there is a discrepancy between the index signal output by the index sensor 36 and the timing corresponding to the logical index signal for controlling the wheel 35 by the projected light processing unit 18. In this case, as described above, the boundary of the region of different colors for each gradation clearly appears in the adjustment image.

By referring to this adjustment image, the user performs an operation for adjusting the index parameter in the direction in which the deviation is reduced, as shown in FIG. 6B.
By adjusting the index parameter in response to this adjustment operation, the parameter adjusting unit 64 reduces the deviation, and the index signal output by the index sensor 36 and the projected light processing unit 18 are logical for controlling the wheel 35. The timings corresponding to the index signals match. In this case, as described above, the boundary of the region of different colors for each gradation does not clearly appear in the adjustment image.

As a result, the projected light processing unit 18 can appropriately control the time during which the blue light source is applied to the transmission region and the reflection region of the wheel 35. Therefore, it is possible to prevent problems such as color mixing from occurring in the image projected by the image display device 10.

By performing this adjustment work once, for example, at the time of shipment from the factory, it is possible to suppress the deviation and realize the output of the target color.
That is, according to the present embodiment, it is possible to generate an adjustment image for easy adjustment and provide it to the user.

[motion]
Next, the operation of the image display device 10 will be described.
FIG. 7 is a flowchart illustrating a flow of parameter adjustment processing executed by the image display device 10 of FIG. 1 having the functional configuration of FIG.
The parameter adjustment process is executed when the operation unit 53 accepts an operation instructing the start of index parameter adjustment from the user.

In step S11, the adjustment image generation unit 62 generates an adjustment image as shown in FIG. 5 as an example.

In step S12, the projection unit 63 projects and displays the adjustment image generated in step S11 on a screen (not shown) to be projected.

In step S13, the mode determination unit 61 determines whether or not the operation unit 53 has received an operation for ending the index parameter adjustment mode from the user.
If the operation unit 53 does not accept an operation for ending the index parameter adjustment mode from the user, it is determined as No in step S13, and this parameter adjustment process ends. This is a case where the user who refers to the adjustment image determines that the adjustment is not necessary because the boundary of the area of the color different by one gradation does not clearly appear in the adjustment image.

On the other hand, when the operation unit 53 receives an operation for ending the index parameter adjustment mode from the user, it is determined as Yes in step S13, and the process proceeds to step S14. This is a case where the user who has referred to the adjustment image determines that the adjustment is necessary because the boundary of the area of the color different by one gradation is clearly shown in the adjustment image.

In step S14, the parameter adjustment unit 64 receives the parameter adjustment operation from the user via the operation unit 53. The parameter adjustment operation is performed, for example, by pressing the + -button or the like of the operation unit 53.

In step S15, the parameter adjustment unit 64 adjusts and updates the index parameter stored in the index parameter storage unit 71 according to the operation received in step S14. As a result, the timing difference between the index signal output by the index sensor 36 and the logical index signal for the projected light processing unit 18 to control the wheel 35 is reduced.

After that, the process returns to step S11, the adjustment image is generated again in a state where the deviation is reduced, and the processes after step S12 are repeated. Then, in the process of repetition, the deviation disappears, and the boundary of the region of the color different by one gradation does not clearly appear in the adjustment image. Then, when the user who has referred to the adjustment image determines that the adjustment is unnecessary, it is determined as No in step S13, and the parameter adjustment process ends.

[effect]
The effects of the present embodiment described above will be described.
If there is a discrepancy between the index signal and the video signal, color misalignment will occur in the projected image. Normally, this color shift does not make a significant difference when the shift of the index signal is small, but it looks like a large shift at a specific gradation. It is necessary to match the index signal exactly in order to display accurately for any color.

Therefore, as described above, in the present embodiment, for example, as shown in FIG. 5, the first color region using the color using the boundary portion adjacent section between the G period and the B period, which is greatly affected by the deviation of the index signal. And, the adjustment image including the geometric pattern including the second color region set to the gradation close to the first color without using the boundary adjacent section is projected. In addition, the user adjusts the offset of the video signal so that the geometric pattern does not appear while checking the displayed adjustment image.
This makes it possible to match the index signal exactly. In addition, it is possible to determine whether or not adjustment is necessary by checking whether or not the geometric pattern appears before starting the adjustment work.
Further, by arranging the gradations geometrically, the visibility can be improved and the adjustment by the user can be facilitated. That is, in the present embodiment, it is possible to generate and provide an adjustment image for easy adjustment.

The image display device 10 configured as described above includes a semiconductor laser 31, a wheel 35, an adjustment image generation unit 62, and a projection unit 63.
The semiconductor laser 31 irradiates light.
The wheel 35 has a first region and a second region as regions for adjusting the color component of the light irradiated by the semiconductor laser 31.
The adjustment image generation unit 62 uses a first color that uses a section adjacent to the boundary between the first region and the second region, and a second color component that is close to the first color without using the section adjacent to the boundary. Generates an adjustment image in which the colors of are arranged adjacent to each other.
The projection unit 63 projects the adjustment image generated by the adjustment image generation unit 62.
Thereby, for example, the first color created by using the boundary adjacent section straddling the reflection region and the transmission region of the wheel, and the color component created without using this boundary adjacent section, and the color component is close to the first color. It is possible to provide an adjustment image in which the second color is arranged adjacent to the second color.
Therefore, the index signal can be matched accurately. In addition, it can be confirmed whether or not adjustment is necessary before the index signal adjustment work.

The adjustment image generation unit 62 generates an adjustment image by selecting colors that differ by one gradation in the color components adjusted in the first region and the second region as the first color and the second color. do.
This makes it easy to grasp the deviation of the index signal.

The adjustment image generation unit 62
The first color on the first region side that uses the section on the first region side adjacent to the boundary and the second color on the first region side that does not use the section on the first region side adjacent to the boundary are the first. Arranged as a set of colors,
The first color on the second region side that uses the section on the second region side adjacent to the boundary and the second color on the second region side that does not use the section on the second region side adjacent to the boundary are second. As a set of colors, an adjustment image arranged further adjacent to the first set of colors is generated.
As a result, the deviation of the index signal can be represented in the adjustment image regardless of whether the index signal is displaced toward the first region side or the second region side.

The first region is a region for adjusting the color component of light by reflecting the light irradiated by the semiconductor laser 31, and the second region is a region for adjusting the color component of light by transmitting the light irradiated by the semiconductor laser 31. ..
This provides an adjustment image for a wheel that has both an area for adjusting the color component of light by reflecting reflected light and an area for adjusting the color component of light by transmitting light. Can be done.

The first region and the second region are regions characterized in that they are regions that generate different colors by adjusting the color components of the light irradiated by the semiconductor laser 31.
Thereby, for example, it is possible to provide an adjustment image for a color wheel in which each region produces a different color due to transmission (or reflection).

The image display device 10 further includes a parameter adjusting unit 64.
The parameter adjusting unit 64 corresponds to the boundary between the first region and the second region in the control by the rotation control of the wheel 35 and the physical boundary of the wheel 35 based on the adjustment image projected by the projection unit 63. Logically in the control of the wheel 35 in order to reduce the difference between the boundary between the first region and the second region specified based on the index signal generated by detecting the index provided in the above. It is characterized by adjusting the settings that determine the boundaries.
Thereby, the adjustment image can be utilized for the purpose of making adjustments for reducing the difference between the logical boundary and the boundary specified based on the index signal.

The parameter adjustment unit 64 adjusts so that the boundary line between the first color and the second color in the adjustment image projected by the projection unit 63 cannot be visually recognized.
As a result, when the logical boundary and the boundary specified based on the index signal deviate from each other, the gradation changes rapidly and the geometric pattern emerges, which is a characteristic of the adjustment image. be able to.

The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.

Further, in the above-described embodiment, as the wheel to which the present invention is applied, the wheel 35, which is a wheel having both a transmission region and a reflection region, has been described as an example, but the present invention is not limited thereto. The present embodiment can be generally applied to the detection of boundaries in a normal color wheel in each region (or each region is a reflection region). For example, detection of each boundary portion of a color wheel having regions R, G, and B (or, in addition to this, a color wheel having regions such as W (White), C (Cyan), Y (Yellow), etc.). In addition, the phosphor used as the reflection region is generally applicable. Although the example of producing green from a blue light source has been described, the present invention is not limited to this, and a red or yellow phosphor may be used, and a red phosphor may be used for one wheel. It may be configured to form a reflection region of a plurality of colors such as a region and a green phosphor region.

Further, in the above-described embodiment, the case where the user visually adjusts the index parameter by visually observing the adjustment image has been described, but the present invention is not limited to this. For example, a measuring device that measures colors detects the color of each region of the adjustment image and determines the magnitude of the difference. Then, the parameter adjusting unit 64 may adjust the index parameter based on this determination result.

The series of processes described above can be executed by hardware or software.
In other words, the functional configuration of FIG. 2 is merely an example and is not particularly limited. That is, it suffices if the image display device 10 is provided with a function capable of executing the above-mentioned series of processes as a whole, and what kind of functional block is used to realize this function is not particularly limited to the example of FIG. ..

Further, one functional block may be configured by a single piece of hardware, a single piece of software, or a combination thereof.
The functional configuration in the present embodiment is realized by a processor that executes arithmetic processing, and the processor that can be used in the present embodiment is composed of various processing devices such as a single processor, a multiprocessor, and a multicore processor. In addition to the above, the present invention includes a combination of these various processing devices and a processing circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).

When a series of processes are executed by software, a program constituting the software is installed in a computer or the like from a network or a recording medium.
The computer may be a computer embedded in dedicated hardware. Further, the computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose personal computer.

The recording medium including such a program is not only composed of the removable media 101 of FIG. 1 distributed separately from the main body of the device in order to provide the program to the user, but also the user in a state of being preliminarily incorporated in the main body of the device. It is composed of a recording medium or the like provided in. The removable media 101 is composed of, for example, a magnetic disk (including a floppy disk), an optical disk, a magneto-optical disk, or the like. The optical disk is composed of, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versaille Disk), a Blu-ray (registered trademark) Disc (Blu-ray Disc), or the like. The magneto-optical disk is composed of MD (Mini-Disc) or the like. Further, the recording medium provided to the user in a state of being incorporated in the apparatus main body in advance is composed of, for example, a semiconductor memory included in the storage unit 52 of FIG. 1 in which the program is recorded.

In the present specification, the steps for describing a program recorded on a recording medium are not only processed in chronological order but also in parallel or individually, even if they are not necessarily processed in chronological order. It also includes the processing to be executed.

Although the embodiment of the present invention has been described above, this embodiment is merely an example and does not limit the technical scope of the present invention. The present invention can take various other embodiments, and further, various modifications such as omission and substitution can be made without departing from the gist of the present invention. These embodiments and variations thereof are included in the scope and gist of the invention described in the present specification and the like, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

The inventions described in the claims at the time of filing the application of the present application are described below.
[Appendix 1]
The light source that irradiates light and
As a region for adjusting the color component of the light emitted by the light source unit, a wheel having a first region and a second region, and
A first color using a section adjacent to the boundary between the first region and the second region, and a second color having a color component close to the first color without using the section adjacent to the boundary. A generation means for generating adjustment images arranged adjacent to each other,
A projection means for projecting the adjustment image generated by the generation means, and a projection means.
An image generator for adjustment, which comprises.
[Appendix 2]
The generation means selects a color that differs by one gradation in the color components adjusted in each of the first region and the second region as the first color and the second color, and the adjustment image. The image generator for adjustment according to Appendix 1, wherein the image is generated.
[Appendix 3]
The generation means is
The first color on the first region side that uses the section on the first region side adjacent to the boundary, and the second color on the first region side that does not use the section on the first region side adjacent to the boundary. As the first set of colors,
The first color on the second region side that uses the section on the second region side adjacent to the boundary, and the second color on the second region side that does not use the section on the second region side adjacent to the boundary. The adjustment image generation device according to Appendix 1 or 2, wherein the adjustment image is further arranged adjacent to the first color set as the second color set.
[Appendix 4]
The first region is a region for adjusting the color component of light by reflecting the light irradiated by the light source unit, and the second region is a region for transmitting the light irradiated by the light source unit to obtain the color component of light. The adjustment image generator according to any one of Supplementary note 1 to 3 to be adjusted.
[Appendix 5]
The first region and the second region are characterized in that they are regions that generate different colors by adjusting the color components of the light emitted by the light source unit. The adjustment image generator according to any one of Supplementary note 1 to 4.
[Appendix 6]
Based on the adjustment image projected by the projection means, it is provided corresponding to the boundary between the first region and the second region under the control of the rotation control of the wheel and the physical boundary of the wheel. To reduce the difference between the boundary between the first region and the second region identified based on the index signal generated by detecting the index, the logical boundary in the control of the wheel is determined. The adjustment image generation device according to any one of Supplementary note 1 to 5, further comprising an adjustment means for adjusting the set value.
[Appendix 7]
The addition 6 is characterized in that the adjusting means makes adjustments so that the boundary line between the first color and the second color in the adjusting image projected by the projection means cannot be visually recognized. Image generator for adjustment.
[Appendix 8]
The light source that irradiates light and
It is an adjustment image generation method performed by a device provided with a wheel having a first region and a second region as a region for adjusting the color component of the light irradiated by the light source unit.
A first color using a section adjacent to the boundary between the first region and the second region, and a second color having a color component close to the first color without using the section adjacent to the boundary. A generation step to generate an adjacent adjustment image, and
A projection step for projecting the adjustment image generated in the generation step, and a projection step.
An image generation method for adjustment, which comprises.

10 ... Image display device, 11 ... Input / output connector, 12 ... Input / output interface (I / F), 13 ... System bus, 14 ... Image converter, 15 ... VRAM, 16 ... Projection image processing unit, 17 ... Audio output unit, 18 ... Projection light processing unit, 19 ... Projection light generation unit, 20 ... Micromirror element (SLM), 21, 33, 38, 39, 42 ... Mirror, 22 ... Projection lens unit, 31 ... (B emission) semiconductor laser, 32 ... (R emission) LED, 34, 40 ... Dycroic mirror, 35. ... color wheel, 36 ... index sensor, 37 ... motor (M), 41 ... integrator, 51 ... CPU, 52 ... storage unit, 53 ... operation unit, 61 ... -Mode determination unit, 62 ... Adjustment image generation unit, 63 ... Adjustment image projection unit, 64 ... Parameter adjustment unit, 71 ... Index parameter storage unit, 100 ... Removable media,

Claims (4)

By being configured to rotate around a predetermined axis and being arranged on the optical path of light emitted from a predetermined light source, the light is irradiated with the rotation about the predetermined axis. A wheel with a variable area and
A display element that spatially modulates the light from the light source through the wheel based on the predetermined image signal so that the light from the light source through the wheel forms a predetermined image pattern on the projection surface. When,
Equipped with
In the wheel, the region to which the light is irradiated has a first adjustment region in which the irradiated light is emitted by the light of the first color component and a second color component different from the first color component. It is a projection device that is divided into a second adjustment area that emits light .
When a adjustment image having a first color scheme area, a second color scheme region, a third color scheme region, and a fourth color scheme region is projected as the predetermined image pattern, the first color scheme region is used as the first color scheme region. The first color component is formed by light emitted from a region of the first adjustment region adjacent to the boundary with the second adjustment region, and the second color scheme region is formed. The second color component is formed by light emitted from a region of the second adjustment region adjacent to the boundary with the first adjustment region, and the third color scheme region is formed. The first color component is formed by light emitted from a region of the first adjustment region that is distant from the boundary with the second adjustment region, and the fourth color scheme region is formed. Control to control the wheel and the display element so that the second color component is formed by light emitted from a region of the second adjustment region that is distant from the boundary with the first adjustment region. Equipped with means,
The first color scheme region is set so that the region shape corresponds to one of the two semicircles obtained by dividing the circle into two equal parts by a predetermined straight line .
The second color scheme region is set so that the region shape corresponds to the other semicircle of the two semicircles .
In the third color scheme region, the one semicircle is removed from one of the two semi-rectangles in which the region shape includes the circle in the region and is bisected by the predetermined straight line. It is set to correspond to the part
The fourth color scheme is set so that the region shape corresponds to the portion of the two semi-rectangles from which the other semicircle is removed.
The image signal for the adjustment image is such that the luminance gradation with respect to the first color component differs between the first color arrangement region and the third color arrangement region by one gradation. In addition to being set to, the luminance gradation with respect to the second color component is set to be different by one gradation between the second color scheme area and the fourth color scheme region. ,
A projection device characterized by that. The circle is set to a size tangent to two of the four sides of the rectangle.
The projection device according to claim 1. By being configured to rotate around a predetermined axis and being arranged on the optical path of light emitted from a predetermined light source, the light is irradiated with the rotation about the predetermined axis. A wheel with a variable area and
A display element that spatially modulates the light from the light source through the wheel based on the predetermined image signal so that the light from the light source through the wheel forms a predetermined image pattern on the projection surface. When,
Equipped with
In the wheel, the region to which the light is irradiated has a first adjustment region in which the irradiated light is emitted by the light of the first color component and a second color component different from the first color component. It is an adjustment support method executed by a projection device that is divided into a second adjustment area emitted by light.
When a adjustment image having a first color scheme area, a second color scheme region, a third color scheme region, and a fourth color scheme region is projected as the predetermined image pattern, the first color scheme region is used as the first color scheme region. The first color component is formed by light emitted from a region of the first adjustment region adjacent to the boundary with the second adjustment region, and the second color scheme region is formed. The second color component is formed by light emitted from a region of the second adjustment region adjacent to the boundary with the first adjustment region, and the third color scheme region is formed. The first color component is formed by light emitted from a region of the first adjustment region that is distant from the boundary with the second adjustment region, and the fourth color scheme region is formed. Control to control the wheel and the display element so that the second color component is formed by light emitted from a region of the second adjustment region that is distant from the boundary with the first adjustment region. Including processing,
The first color scheme region is set so that the region shape corresponds to one of the two semicircles obtained by dividing the circle into two equal parts by a predetermined straight line.
The second color scheme region is set so that the region shape corresponds to the other semicircle of the two semicircles.
In the third color scheme region, the one semicircle is removed from one of the two semi-rectangles in which the region shape includes the circle in the region and is bisected by the predetermined straight line. It is set to correspond to the part
The fourth color scheme is set so that the region shape corresponds to the portion of the two semi-rectangles from which the other semicircle is removed.
The image signal for the adjustment image is such that the luminance gradation with respect to the first color component differs between the first color arrangement region and the third color arrangement region by one gradation. In addition to being set to, the luminance gradation with respect to the second color component is set to be different by one gradation between the second color scheme area and the fourth color scheme region. ,
An adjustment support method characterized by that. By being configured to rotate around a predetermined axis and being arranged on the optical path of light emitted from a predetermined light source, the light is irradiated with the rotation about the predetermined axis. A wheel with a variable area and
A display element that spatially modulates the light from the light source through the wheel based on the predetermined image signal so that the light from the light source through the wheel forms a predetermined image pattern on the projection surface. When,
Equipped with
In the wheel, the region to which the light is irradiated has a first adjustment region in which the irradiated light is emitted by the light of the first color component and a second color component different from the first color component. The computer of the projection device, which is divided into the second adjustment area emitted by light ,
When a adjustment image having a first color scheme area, a second color scheme region, a third color scheme region, and a fourth color scheme region is projected as the predetermined image pattern, the first color scheme region is used as the first color scheme region. The first color component is formed by light emitted from a region of the first adjustment region adjacent to the boundary with the second adjustment region, and the second color scheme region is formed. The second color component is formed by light emitted from a region of the second adjustment region adjacent to the boundary with the first adjustment region, and the third color scheme region is formed. The first color component is formed by light emitted from a region of the first adjustment region that is distant from the boundary with the second adjustment region, and the fourth color scheme region is formed. Control to control the wheel and the display element so that the second color component is formed by light emitted from a region of the second adjustment region that is distant from the boundary with the first adjustment region. To function as a means,
The first color scheme region is set so that the region shape corresponds to one of the two semicircles obtained by dividing the circle into two equal parts by a predetermined straight line .
The second color scheme region is set so that the region shape corresponds to the other semicircle of the two semicircles .
In the third color scheme region, the one semicircle is removed from one of the two semi-rectangles in which the region shape includes the circle in the region and is bisected by the predetermined straight line. It is set to correspond to the part
The fourth color scheme is set so that the region shape corresponds to the portion of the two semi-rectangles from which the other semicircle is removed.
The image signal for the adjustment image is such that the luminance gradation with respect to the first color component differs between the first color arrangement region and the third color arrangement region by one gradation. In addition to being set to, the luminance gradation with respect to the second color component is set to be different by one gradation between the second color scheme area and the fourth color scheme region. ,
A program characterized by that.

Images