JP5157316B2 - Two-image supply device, two-image display system, and vehicle navigation device - Google Patents

Description

  The present invention relates to a two-image supply device, a two-image display system, and a vehicle navigation device.

  Conventionally, a display in which the first image can be seen when the screen is viewed in the first direction and the second image can be viewed when the same screen is viewed in a second direction different from the first direction (hereinafter referred to as multiple images). 2. Description of the Related Art Two-screen display devices (referred to as “view display”) (for example, see Patent Documents 1, 2, and 3) have been put into practical use as in-vehicle display devices.

  For example, as shown in FIG. 7, when the display screen of the liquid crystal display 12 is viewed in the direction 82 from the passenger seat user 81 on the left side toward the liquid crystal display 12 toward the display surface of the liquid crystal display 12 as an example of the image display device. An image 71 composed of a TV or DVD image (hereinafter simply referred to as a TV / DVD image) and a control panel image is seen, and the same display screen is seen in the direction 84 from the driver seat user 83 on the right side to the liquid crystal display 12 In this case, the map image 72 is visible.

  As is well known, such a two-screen display device can perform multi-view display by receiving supply of a combined image. The combined image is a combination of a plurality of pixels constituting the first image (image 71 in FIG. 7) and a plurality of pixels constituting the second image (image 72 in FIG. 7) in a predetermined arrangement. This is the image. As the predetermined arrangement, for example, there is an array in which the pixels of the first image and the pixels of the second image are alternately allocated for each column.

  In order to supply such a combined image, a two-image supply apparatus having a configuration as shown in FIG. 8 is conventionally used. The two-image supply device shown in FIG. 8 includes a first drawing IC 51, a second drawing IC 52, a screen composition IC 53, and a pixel conversion IC 54.

  Each of the first drawing IC 51 and the second drawing IC 52 acquires an image component group (hereinafter simply referred to as a component group) from a maximum of two image sources at the same time among a plurality of image sources, and based on the acquired component group. It has a function of generating an image for output to the screen composition IC 53. Examples of the plurality of image sources include a TV / DVD video supply source, a map image supply source, and a button group image supply source.

  As shown in the example of FIG. 7, a button for controlling the TV / DVD video and the display content of the TV / DVD video is visible from the passenger seat side, and the TV / DVD video is not visible from the driver side. It may be preferable that the map image is visible. In order to realize such a display, it is necessary to use images from three image sources: a TV / DVD video source, a control panel image source, and a map image source.

  Therefore, conventionally, two drawing ICs 51 and 52 that can simultaneously use a maximum of two image sources are used. That is, as illustrated in FIG. 9, one first drawing IC 51 simultaneously acquires a control panel image component (for example, a button image) and a TV / DVD image, and the number of pixels is horizontal N from the control panel image component. A control panel image 61 having M × vertical M pixels (where N is an even number and M is an integer) is formed, and a TV / DVD video 62 is superimposed on the control panel image 61, and the resulting horizontal N × An image having M vertical pixels is output as an output image. Then, the other second drawing IC 52 acquires parts of the map image and configures these parts to output a map image 63 having N pixels in the horizontal direction and M pixels in the vertical direction as illustrated in FIG. It generates as an image.

  The screen composition IC 53 has a function of acquiring and synthesizing images from a maximum of two image sources at the same time among a plurality of image sources. However, unlike the drawing IC, it does not have a function of configuring an image from components. The screen composition IC 53 uses the first drawing IC 51 and the second drawing IC 52 as video sources. Specifically, the screen compositing IC 53 thins out the pixels in the horizontal direction for each of the output image from the first drawing IC 51 and the output image from the second drawing IC 52, so that the number of horizontal pixels of the output image is increased. Is reduced to half N / 2, and the output images obtained by the thinning are connected in the horizontal direction, so that images 66 and 67 for the passenger seat and the driver's seat side as shown in FIG. A bidirectional image having N pixels in the horizontal direction and M pixels in the vertical direction including the image 68 is generated.

Then, the screen composition IC 53 outputs this bidirectional image to the pixel conversion IC 54. The pixel conversion IC 54 converts the arrangement of the pixels of the bidirectional image to generate a combined image having N × M pixels as illustrated in FIG. 12 and supplies it to the liquid crystal display 12. . By the operation of such a two-image supply device, the liquid crystal display 12 can realize multi-view display.
JP 09-46622 A JP-A-11-331876 JP 2006-154754 A

  However, the two-image supply apparatus as described above requires two drawing ICs having a function of configuring an image from image components. This is a cause of raising the manufacturing cost of the two-image supply device.

  In view of the above, the present invention provides a two-image supply device that supplies an image to an image display device having a multi-view display function, and simultaneously acquires images or image components from two image sources at the same time. An object is to reduce the number of drawing ICs having a function of constituting an image.

  A feature of the present invention for achieving the above object is that a plurality of pixels constituting the first image (41, 43) and a plurality of pixels constituting the second image (42) are collectively arranged in a predetermined arrangement. By receiving the combined image (44) that has been combined, the first image is visible when the screen is viewed in the first direction (82), and the second direction (84) is different from the first direction. The present invention relates to a two-image supply device that supplies the combined image to an image display device (12) that displays so that the second image can be seen when the same screen is viewed.

  The two-image supply device includes a drawing IC (21), a screen composition IC (22), and a pixel conversion IC (23).

The drawing IC acquires image component groups (hereinafter simply referred to as component groups) from a maximum of two image sources simultaneously among a plurality of image sources (15, 16, 17, 18 , 21 ). Based on this, output images (41, 42) are generated.

  The screen composition IC obtains images from a maximum of two image sources at the same time from among the plurality of image sources and synthesizes them, thereby generating a bidirectional image (41, 42, 43) including the first image and the second image. Is generated. Further, the pixel conversion IC generates a combined image (44) by converting the arrangement of the pixels of the bidirectional image generated by the screen composition IC, and supplies the combined image (44) to the image display device (12).

In such a two-image supply device, the drawing IC obtains the first component group from the first image source (17) among the plurality of image sources and the first image source among the plurality of image sources. The second component group is acquired from the second image source (18) different from (17), and the third image (41) is constructed from the first component group and the second component group is second from the second component group. Of the image (42), and outputs an image including the third image (41) and the second image (42) as an output image,
The screen composition IC obtains an output image from the drawing IC among the plurality of image sources, and also transmits a TV image or DVD from the TV image source (15) or the DVD image source (16) among the plurality of image sources. Bidirectional in which the video (43) is acquired and the third video (41) in the output image is superimposed on the TV video or DVD video (43) as the first image (41, 43) Images (41, 42, 43) are generated and output to the pixel conversion IC.

  As described above, in the present invention, since the drawing IC performs all image configurations based on component groups from different image sources, only one drawing IC is required. Further, the superimposition of the TV / DVD video (43) on the output image (41, 42) generated by the drawing IC can be performed by using the screen composition IC (22). By doing so, the number of drawing ICs can be reduced, and the manufacturing cost of the two-image supply device can be suppressed.

  In addition, the combined image that the image display device is supplied from the two-image supply device has N (where N is an even number) in the horizontal direction and the first image (41) that is a component of the combined image. 43) and the second image (42) may each have N / 2 horizontal pixel counts.

  In the conventional two-image supply device shown in FIGS. 8 to 12, the first drawing IC 51 generates images 61 and 62 with the number of horizontal pixels N, and the second drawing IC 52 generates the image 63 with the number of horizontal pixels N. The number of pixels in the horizontal direction comprising the images 66 and 67 having the number of pixels in the horizontal direction N / 2 and the image 68 having the number of pixels in the horizontal direction N / 2 is obtained by thinning out the pixels of the images in the horizontal direction by the screen composition IC 53. N bidirectional images are generated. In such a method, a part of the image that is bothered is thrown away without being used for output on the liquid crystal display 12. Therefore, processing waste occurs, and this waste leads to an increase in processing load and manufacturing cost.

  In order to cope with such a problem, the drawing IC of the present invention forms a third image (41) having a horizontal pixel number N / 2 from the acquired first component group and acquires the second image. A second image having a horizontal pixel number of N / 2 is formed from the component group, and the third image and the second image connected in the horizontal direction are used as an output image. It may be output.

  Then, the screen composition IC generates a bi-directional image with N pixels in the horizontal direction with the first image obtained by superimposing the TV / DVD video (43) on the third image in the acquired output image. Output to the pixel conversion IC, and the pixel conversion IC converts the arrangement of the pixels of the bidirectional image generated by the screen composition IC, thereby generating a combined image having N horizontal pixels and supplying the image to the image display device. You may come to do.

  In this way, the drawing IC sets the number of horizontal pixels of the third image (41) and the second image (42) to N / 2 from the beginning, so that the generated image is discarded wastefully. Will not be lost. Therefore, an increase in processing load and an increase in manufacturing cost can be suppressed.

  The feature of the present invention can also be understood as a two-image display system including the two-image supply device (19) and the liquid crystal display (12) as described above. Further, the feature of the present invention can be grasped as a vehicle navigation apparatus including such a two-image display system (12, 19) and a control circuit for controlling the drawing unit 19.

  In addition, the code | symbol in the parenthesis in the said claim shows the correspondence of the term described in the claim, and the concrete thing etc. which illustrate the said term described in embodiment mentioned later.

  Hereinafter, an embodiment of the present invention will be described. In FIG. 1, the structure of the navigation apparatus 1 for vehicles which concerns on this embodiment is shown. The vehicle navigation apparatus 1 includes a position detector 11, a liquid crystal display 12, an operation unit 13, a speaker 14, a TV tuner 15, a DVD player 16, a flash memory 17, a map data storage unit 18, a drawing unit (an example of a two-image supply device). And a control circuit 20.

  The position detector 11 includes a well-known sensor (not shown) such as a geomagnetic sensor, a gyroscope, a vehicle speed sensor, and a GPS receiver. The current position and direction of the vehicle based on the characteristics of each of these sensors. , And information for specifying the speed is output to the control circuit 20. The operation unit 13 includes an input device that receives a user operation, and outputs a signal based on the user operation on the input device to the control circuit 20.

  The liquid crystal display 12 displays a video based on the video signal supplied from the drawing unit 19 to the user. In the present embodiment, the liquid crystal display 12 is mounted on the instrument panel of the vehicle at a position between the driver seat and the passenger seat with the display screen facing the rear of the vehicle.

  The liquid crystal display 12 has a multi-view display function. In the multi-view display, as illustrated in FIG. 7, when the screen is viewed in the first direction 82, the first image 71 is seen, and the same screen is displayed in the second direction 84 different from the first direction 82. A display in which the second image 72 can be seen when viewed. In the present embodiment, the direction 82 corresponds to the direction from the passenger 81 in the passenger seat to the display screen of the liquid crystal display 12, and the direction 84 corresponds to the direction from the passenger 83 in the driver seat to the liquid crystal display 12. While the vehicle is running, even when the TV screen or DVD video (hereinafter simply referred to as TV / DVD video) can be seen when viewing the display screen in the direction 82, at the same time, the display screen is viewed in the direction 84. Sometimes it is desirable for safe driving of a vehicle that a TV / DVD image cannot be seen and a map image or the like can be seen.

  The liquid crystal display 12 is supplied with a combined image composed of N horizontal pixels × vertical M pixels (where N is an even number and M is an integer) from the drawing unit 19 in order to realize multi-view display. The combined image means all pixels constituting the first image (corresponding to the image 71 in FIG. 7) composed of N / 2 horizontal × M vertical pixels, and N / 2 horizontal × M vertical pixels. This is an image in which all pixels constituting a second image (corresponding to the image 72 in FIG. 7) composed of pixels are combined in a predetermined arrangement. As the predetermined arrangement, for example, all pixels in the odd-numbered columns in the horizontal direction (that is, the direction of displacement between the passenger seat occupant 81 and the driver seat occupant 83, in other words, the horizontal direction) The first image and the second image are alternately arranged for each column in the horizontal direction such that the pixels are arranged in order, and the pixels of the second image are sequentially arranged for all the pixels in the even-numbered columns. There is an array to do.

  When the combination image arranged in this way is provided and the screen is viewed in the first direction 82, the first image 71 is visible, and when the screen is viewed in the second direction 84, the second image 72 is displayed. There are various known configurations for performing visible display (for example, see the lenticular lens in Patent Document 2 and the parallax barrier described in Patent Document 3).

  The TV tuner 15 is a device that receives a radio signal for television broadcasting in accordance with control from the control circuit 20 and outputs a moving image signal (that is, TV video) of a television program included in the received signal to the drawing unit 19. is there. The TV tuner 15 functions as an example of an image source because it is a TV video data source.

  The DVD player 16 is a device that reads moving image data recorded on a DVD medium under the control of the control circuit 20 and outputs a moving image signal (that is, a DVD image) based on the read moving image data to the drawing unit 19. Since this DVD player 16 is a DVD video data source, it functions as an example of an image source.

  The flash memory 17 is a non-volatile storage medium that stores a plurality of component data of the control panel image. The control panel image is an icon (for example, button image, slide bar image, dial image, etc.) for controlling the display contents of TV / DVD video (for example, channel switching, fast forward, rewind, cueing, brightness adjustment). ) Is a plurality of arranged images. These icons can be operated by the user using the operation unit 13.

  Here, the component means an image (for example, an icon or a background image) that is a component of the control panel image. The flash memory 17 can be read from the drawing unit 19 and the control circuit 20. As described above, the flash memory 17 functions as an example of an image source because it is a data source for parts of a control panel image.

  The map data storage unit 18 includes a nonvolatile storage medium such as a DVD medium, a CD medium, and an HDD, and a device that reads data (and writes data if possible) to the storage medium. The storage medium stores a program executed by the control circuit 20, map data for route guidance, and the like.

  The map data includes road data, facility data, and map image part data. The road data includes link position information, type information, node position information, type information, and information on the connection relationship between nodes and links. The facility data includes a plurality of records for each facility, and each record includes data indicating name information, facility type information, and the like of the target facility.

  The map image component data has a plurality of types of component data which are constituent elements of the map image. The parts include road images created for each shape, intersection images created for each shape, polygon images for constructing the facility outline, facility icons created for each facility type, etc. .

  The map data storage unit 18 can be read from the drawing unit 19 and the control circuit 20. As described above, the map data storage unit 18 functions as an example of an image source because it is a data source for parts of a map image.

  The drawing unit 19 acquires image data or image component data from the TV tuner 15, the DVD player 16, the flash memory 17, the map data storage unit 18, etc., which are image sources, based on the control contents from the control circuit 20. A device that generates a combined image in which the pixels of the first image data and the pixels of the second image data are combined in a predetermined arrangement based on the acquired data, and displays the generated image on the liquid crystal display 12. is there. Details of the drawing unit 19 will be described later.

  A control circuit (corresponding to a computer) 20 is a microcomputer having a CPU, a RAM, a ROM, an I / O, and the like. The CPU executes a program for the operation of the vehicle navigation device 1 read out from the ROM or the map data storage unit 18, reads information from the RAM, ROM, and the map data storage unit 18 when executing the program. And, if possible, information is written to the storage medium of the map data storage unit 18, and the position detector 11, the liquid crystal display 12, the operation unit 13, the speaker 14, the TV tuner 15, the DVD player 16, the drawing unit Send and receive signals with 19 etc.

  Specific processing performed by the control circuit 20 executing the program includes current position specifying processing, guidance route calculation processing, route guidance processing, image display control processing, and the like.

  The current position specifying process is a process for specifying the current position and direction of the vehicle based on a signal from the position detector 11 using a known technique such as map matching. The guidance route calculation process is a process of receiving an input of a destination by the user from the operation unit 13 and calculating an optimum guidance route from the current position to the destination.

  In the route guidance process, when necessary, such as when the host vehicle arrives before the guidance intersection, a guidance voice signal instructing a right turn, a left turn, etc. is output to the speaker 14 or through the image display control process on the liquid crystal display 12. This is a process for displaying an enlarged intersection image.

  The image display control process is a process for controlling the drawing unit 19 in order to display a map image, a TV / DVD image or the like on the liquid crystal display 12 as necessary. In the present embodiment, in order to use the multi-view display function of the liquid crystal display 12, the drawing unit 19 determines an image to be displayed to the passenger in the passenger seat and an image to be displayed to the driver in the driver seat, and according to the determination, The drawing unit 19 is controlled.

  For example, in the image display control process, the drawing unit 19 determines whether or not the vehicle is traveling based on a signal from a vehicle speed sensor or the like. The drawing unit 19 is controlled so that the / DVD video and the control panel image can be seen, and at the same time the map image can be seen without the TV / DVD video seen by the passenger in the driver seat. Specific control contents performed by the control circuit 20 on the drawing unit 19 will be described later.

  Here, the configuration of the drawing unit 19 will be described. FIG. 2 is a block diagram showing the hardware configuration of the drawing unit 19. The drawing unit 19 includes a drawing IC 21, a screen composition IC 22, and a pixel conversion IC 23.

  The drawing IC 21 has a function of acquiring image component groups from a plurality of image sources 15 to 18, generating an output image from the acquired component groups, and outputting the generated output image to the screen synthesis IC 22. . However, the drawing IC 21 includes only two ports for acquiring an image or a component group from the image source. Therefore, the image source from which the drawing IC 21 can simultaneously acquire data is two at maximum. Further, from which image source the drawing IC 21 acquires the component group and what kind of image is generated based on the acquired component group is determined by a control signal received from the control circuit 20. The drawing IC 21 functions as an example of an image source because it outputs an image.

  The screen composition IC 22 generates a bidirectional image including the first image for the passenger seat and the second image for the driver seat by acquiring and compositing the images from the plurality of image sources 15 to 18 and 21. It has a function. However, the screen composition IC 22 has only two ports for acquiring images from the image source. Therefore, a maximum of two image sources can be acquired simultaneously by the screen composition IC 22. Further, the image source from which the screen composition IC 22 acquires the component group and in what form the image composition is performed are determined by a control signal received from the control circuit 20.

  The pixel conversion IC generates a combined image by converting the pixel arrangement of the bidirectional image generated by the screen composition IC. Then, by outputting the generated image to the liquid crystal display 12, the generated image is supplied to the liquid crystal display 12.

  Next, the control of the control circuit 20 for the drawing unit 19 having the above-described configuration and the operation of the drawing unit 19 based on the control will be described with reference to FIGS. 3 shows an example of an output image generated by the drawing IC 21, FIG. 4 shows an example of a bidirectional image generated by the screen synthesis IC 22, and FIG. 5 conceptually shows an image synthesis method of the screen synthesis IC 22. FIG. 6 shows a combined image 44 generated by the pixel conversion IC 23.

  The control circuit 20 determines that it is necessary to display the DVD / TV image and the control panel image on the passenger seat and to display the map image on the driver seat based on the fact that the vehicle is traveling. Based on the determination, a control signal including the following commands (A1) to (A4) is output to the drawing IC 21.

(A1) A specific part of the control panel image is acquired from one port, and at the same time, a specific part of the map image is acquired from the other port.
(A2) An image 41 (corresponding to an example of a third image) composed of N / 2 horizontal × M vertical pixels in which specific components of the acquired control panel image are arranged in a specific arrangement is configured (FIG. 3).
(A3) An image 42 (corresponding to an example of the second image) 42 composed of N / 2 horizontal × M vertical pixels in which specific parts of the acquired map image are arranged in a specific arrangement is configured (FIG. 3). reference).
(A4) An output image composed of N pixels in the horizontal direction and M pixels in the vertical direction in which the configured image 41 and the image 42 are connected horizontally is generated (see FIG. 3).

  The specific part of the control panel image refers to a part selected by the control circuit 20 according to the type of TV / DVD video that is currently displayed. For example, when a TV image is to be displayed, an icon for channel selection is selected, and when a DVD image is to be displayed, an icon for starting playback, an icon for stopping playback, and an icon for fast-forwarding Include. Further, the specific arrangement of the parts of the control panel image refers to an arrangement determined in advance according to the type of TV / DVD image to be displayed at present.

  The specific part of the map image refers to a road or facility included in a target area (for example, a predetermined range area centered on the current position) where the current map image is to be displayed. Further, the specific arrangement of the parts of the map image means an arrangement determined by the control circuit 20 based on the structure of the road and facility in the area to be displayed.

  By receiving such a control signal from the control circuit 20, the drawing IC 21 acquires a control panel image component group (corresponding to an example of the first component group) from the flash memory 17 among a plurality of image sources. The component group for map images (corresponding to an example of the second component group) is acquired from the map data storage unit 18 among the plurality of image sources. The drawing IC 21 forms a control panel image 41 having a horizontal pixel number N / 2 from the component group of the control panel image and a map image 42 having the horizontal pixel number N / 2 from the component group for the map image. Configure. Further, the drawing IC 21 outputs the control panel image 41 and the map image 42 configured as described above to the screen composition IC 22 as an output image having an image with N pixels in the horizontal direction connected in the horizontal direction left or right.

  In addition, the control circuit 20 outputs control signals including the above commands (A1) to (A4) to the drawing IC 21 and includes the following commands (B1) to (B3) to the screen composition IC 22. Output a control signal.

(B1) An output image output from the drawing IC 21 is acquired from one port, and a TV / DVD video is acquired from the other port at the same time.
(B2) The TV / DVD video 43 is superimposed on a part of the area occupied by the control panel image 41 in the acquired output image (see FIG. 4).
(B3) An image composed of N horizontal pixels × M vertical pixels after superimposition (see FIG. 4) is output to the pixel conversion IC 23 as a bidirectional image.

  Specifically, as a superimposing method, as shown in FIG. 5, an output image including a control panel image 41 and a map image 42 is read into the first layer 31, and a predetermined position ( More specifically, a method (superimpose, overlay) of reading the TV / DVD image 43 at a position that overlaps a part of the control panel image 41 and superimposing them (with priority given to the second layer 32). It may be adopted.

  By receiving such a control signal from the control circuit 20, the screen synthesis IC 22 acquires an output image from the drawing IC 21 that is one of the image sources, and the TV tuner 15 or the DVD player that is one of the image sources. The TV / DVD video 43 is acquired from the image 16 and the TV / DVD video 43 is superimposed on the control panel image 41 in the output image. Then, an image for the passenger seat (corresponding to an example of the first image) composed of the control panel image 41 and the TV / DVD image 43 after the superimposition and an image for the driver seat composed of the map image 42 (an example of the second image). Are generated in a horizontal direction and the number of horizontal pixels is N, and is output to the pixel conversion IC 23.

  The pixel conversion IC 23 that has acquired such a bidirectional image converts the pixels of the bidirectional image generated by the screen synthesis IC 22 and generates a combined image 44 with N horizontal pixels so that the pixels are in a predetermined arrangement. It is generated and supplied to the liquid crystal display 12.

  By receiving such a combination image 44, the liquid crystal display 12 can simultaneously see an image 71, which is a combination of the control panel image 41 and the TV / DVD image 43, from the passenger seat side, as shown in FIG. Further, multi-view display can be performed so that the image 72 including the map image 42 can be seen from the driver side.

  As described above, since one drawing IC 21 performs image configuration based on parts groups from different image sources 17 and 18, only one drawing IC 21 is required. The TV / DVD video 43 can be superimposed on the output image generated by the drawing IC 21 (consisting of the control panel image 41 and the map image 42) by using the screen synthesis IC 22. In this way, the number of drawing ICs in the drawing unit 19 can be reduced, and the manufacturing cost of the drawing unit 19 can be reduced.

  In the conventional two-image supply device shown in FIGS. 8 to 12, the first drawing IC 51 generates images 61 and 62 with the number of horizontal pixels N, and the second drawing IC 52 generates the images with the number of horizontal pixels N. 63, and the screen synthesis IC 53 thins out the pixels of the images in the horizontal direction, thereby forming the horizontal direction composed of the images 66 and 67 having the horizontal pixel number N / 2 and the image 68 having the horizontal pixel number N / 2. A bidirectional image having N pixels is generated. In such a method, a part of the image that is bothered is thrown away without being used for output on the liquid crystal display 12. Therefore, processing waste occurs, and this waste leads to an increase in processing load and manufacturing cost.

  However, since the drawing IC 21 of the present embodiment sets the number of horizontal pixels of the control panel image 41 and the map image 42 to N / 2 from the beginning, the generated image is not wasted. Therefore, an increase in processing load and an increase in manufacturing cost can be suppressed.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, the scope of the present invention is not limited only to the said embodiment, The various form which can implement | achieve the function of each invention specific matter of this invention is included. It is.

  For example, in the above embodiment, the liquid crystal display 12 is shown as an example of an image display device. However, the image display device receives a combined image in which a plurality of pixels constituting the first image and a plurality of pixels constituting the second image are combined together in a predetermined arrangement, thereby providing a multi-view. As long as the function is realized, the display is not limited to the liquid crystal display, but may be any display such as a plasma display, a CRT display, an organic EL display, or a surface-conduction electron-emitter display (SED).

  Further, the wiring of the drawing unit 19 may be configured so that only one output image from the drawing IC 21 is input to one of the two ports of the screen composition IC 22. In this case, the control circuit 20 is only required to designate an image source input to the other port for the screen composition IC 22.

  In the above embodiment, an example in which a composite image of the control panel image 41 and the TV / DVD video 43 is generated as an image for a passenger seat and a map image 42 is generated as an image for a driver seat has been described. In this example, the drawing unit 19 acquires images or parts from three image sources.

  However, the drawing unit 19 does not always have to acquire images or parts from three image sources. In the operation, the drawing unit 19 needs to acquire images or parts from three image sources even once. Anything is acceptable. In that sense, the drawing unit 19 generates a composite image of the control panel image 41 and the TV / DVD video 43 as an image for the passenger seat in another scene, and generates the control panel image 41 as an image for the driver seat. You may come to do.

  In addition, the target to which the two-image display system is applied is not necessarily the vehicle navigation device 1 and can be applied to any field device if the device requires a multi-view display function. .

It is a hardware block diagram of the vehicle navigation apparatus 1 which concerns on embodiment of this invention. It is a hardware block diagram of the drawing part 19 of the navigation apparatus 1 for vehicles. It is a figure which shows an example of the image for an output which drawing IC21 produces | generates. It is a figure which shows an example of the bidirectional | two-way image which the screen synthetic | combination IC22 produces | generates. It is a figure which shows notionally the method of the image composition of the screen composition IC22. It is a figure which shows the combination image 44 which pixel conversion IC23 produces | generates. 3 is a conceptual diagram illustrating a multi-view function of the liquid crystal display 12. FIG. It is a hardware block diagram of the 2 image supply apparatus in a prior art. It is a figure which illustrates the images 61 and 62 which 1st drawing IC51 produces | generates. It is a figure which illustrates image 63 which the 2nd drawing IC52 generates. It is a figure which illustrates images 66, 67, and 68 which screen composition IC53 generates. It is a figure which illustrates image 70 after conversion which pixel conversion IC54 generates.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle navigation apparatus, 11 ... Position detector, 12 ... Liquid crystal display,
13 ... operation unit, 14 ... speaker, 15 ... TV tuner, 16 ... DVD player,
17 ... Flash memory, 18 ... Map data storage unit, 19 ... Drawing unit, 20 ... Control circuit,
21 ... Drawing IC, 22 ... Screen composition IC, 23 ... Pixel conversion IC, 31 ... First layer,
32 ... Second layer, 41 ... Control panel image, 42 ... Map image,
43 ... TV / DVD video, 44 ... combination image, 51 ... first drawing IC,
52 ... 2nd drawing IC, 53 ... Screen composition IC, 54 ... Pixel conversion IC,
61 ... Left side original image, 62 ... TV / DVD video, 63 ... Right side original image,
66 ... Image after thinning for the left side, 67 ... TV / DVD image, 68 ... Image after thinning for the right side,
70: converted image 71: image seen from the left side 72: image seen from the right side
81: Passenger seat occupant, 83 ... Driver seat occupant.

Claims (4)

The supply of the combined image (44) in which the plurality of pixels constituting the first image (41, 43) and the plurality of pixels constituting the second image (42) are combined together in a predetermined arrangement is received. Thus, when the screen is viewed in the first direction, the first image can be seen, and when the screen is viewed in the second direction different from the first direction, the second image can be viewed. A two-image supply device for supplying the combined image to an image display device (12) to be performed,
Image component groups are acquired simultaneously from a maximum of two image sources among a plurality of image sources (15, 16, 17, 18 , 21 ), and output images (41, 42) are obtained based on the acquired component groups.
A drawing IC (21) for generating
Bidirectional images (41, 42, 43) including the first image and the second image by acquiring and combining images from a maximum of two image sources at the same time among the plurality of image sources.
A screen synthesis IC (22) for generating
A pixel conversion IC (23) that generates the combined image and supplies the image to the image display device by converting the arrangement of the pixels of the bidirectional image generated by the screen synthesis IC;
The drawing IC acquires a first component group from a first image source (17) among the plurality of image sources, and a second image source different from the first image source among the plurality of image sources. The second component group is acquired from (18), and the third image (41) is configured from the first component group and the second image is configured from the second component group, and An image including the third image and the second image is output as the output image (41, 42),
The screen composition IC acquires the output image from the drawing IC among the plurality of image sources, and also transmits the TV image source (15) or the DVD image source (16) from the plurality of image sources to the TV. A video or a DVD video (43) is acquired, and the bidirectional image is generated with the TV video or the DVD video superimposed on the third image in the output image as the first image. A two-image supply device that outputs to the pixel conversion IC. The image display device includes a plurality of pixels constituting the first image (41, 43) having a horizontal pixel number of N / 2 (where N is an even number) and a horizontal pixel number of N / 2. In response to the supply of the combined image (44) having a horizontal pixel number N in which a plurality of pixels constituting the second image (42) are combined together in a predetermined arrangement, the first image (42) is supplied in the first direction. When the screen is viewed, the first image is visible, and when the screen is viewed in the second direction, the second image is displayed.
In the drawing IC, the number of horizontal pixels from the acquired first component group is N / 2.
The second image having a horizontal pixel count of N / 2 is constructed from the acquired second component group and the third image and the second image are arranged in the horizontal direction. An image having N pixels in the horizontal direction connected to the output image,
The screen composition IC uses the bi-directional image having N lateral pixels as the first image obtained by superimposing the TV video or DVD video on the third image in the acquired output image. And output to the pixel conversion IC,
The pixel conversion IC converts the arrangement of pixels of the bidirectional image generated by the screen synthesis IC to generate the combined image having N horizontal pixels and supplies the combined image to the image display device. The two-image supply device according to claim 1. The supply of the combined image (44) in which the plurality of pixels constituting the first image (41, 43) and the plurality of pixels constituting the second image (42) are combined together in a predetermined arrangement is received. Thus, when the screen is viewed in the first direction, the first image can be seen, and when the screen is viewed in the second direction different from the first direction, the second image can be viewed. An image display device (12) to perform;
A two-image supply device (19) for supplying the combined image to the image display device;
A two-image display system comprising:
The two-image supply device
Image component groups are simultaneously acquired from a maximum of two image sources among a plurality of image sources (15, 16, 17, 18 , 21 ), and output images (41, 42) are obtained based on the acquired component groups.
A drawing IC (21) for generating
Bidirectional images (41, 42, 43) including the first image and the second image by acquiring and combining images from a maximum of two image sources at the same time among the plurality of image sources.
A screen synthesis IC (22) for generating
A pixel conversion IC (23) for generating the combined image and supplying the combined image to the image display device by converting the arrangement of the pixels of the bidirectional image generated by the screen synthesis IC;
The drawing IC acquires a first component group from a first image source (17) among the plurality of image sources, and a second image source different from the first image source among the plurality of image sources. The second component group is acquired from (18), and the third image (41) is configured from the first component group and the second image is configured from the second component group, and Outputting an image including a third image and a second image as the output image;
The screen composition IC acquires the output image from the drawing IC among the plurality of image sources, and also transmits the TV image source (15) or the DVD image source (16) from the plurality of image sources to the TV. A video or a DVD video (43) is acquired, and the bidirectional image is generated with the TV video or the DVD video superimposed on the third image in the output image as the first image. A two-image display system that outputs to the pixel conversion IC. A vehicle navigation apparatus comprising a control circuit (20) and a two-image display system (19, 12) for displaying an image according to the control of the control circuit,
The two-image display system includes a combination image (a combination of a plurality of pixels constituting the first image (41, 43) and a plurality of pixels constituting the second image (42) in a predetermined arrangement. 44), the first image is seen when the screen is viewed in the first direction, and the second image is viewed when the screen is viewed in a second direction different from the first direction. An image display device (12) for performing display so that an image can be seen, and a two-image supply device (19) for supplying the combined image to the image display device,
The two-image supply device
Image component groups are simultaneously acquired from a maximum of two image sources among a plurality of image sources (15, 16, 17, 18 , 21 ), and output images (41, 42) are obtained based on the acquired component groups.
A drawing IC (21) for generating
Bidirectional images (41, 42, 43) including the first image and the second image by acquiring and combining images from a maximum of two image sources at the same time among the plurality of image sources.
A screen synthesis IC (22) for generating
A pixel conversion IC (23) for generating the combined image and supplying the combined image to the image display device by converting the arrangement of the pixels of the bidirectional image generated by the screen synthesis IC;
When the control circuit controls the drawing IC, the drawing IC acquires a first component group from the first image source (17) among the plurality of image sources and also among the plurality of image sources. A second part group is obtained from a second image source (18) different from the first image source, and a third image (41) is constructed from the first part group and the second part Configuring the second image from a component group, outputting the third image and an image including the second image as the output image,
When the control circuit controls the screen composition IC, the screen composition IC acquires the output image from the drawing IC among the plurality of image sources, and also transmits a TV video image among the plurality of image sources. Obtaining a TV video or DVD video (43) from a source (15) or a DVD video source (16) and superimposing the TV video or DVD video on a third image in the output image A vehicular navigation device that generates the bi-directional image as a first image and outputs the bi-directional image to the pixel conversion IC.

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