JP2006215146A - Image display device and image display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display method of a projector etc., enabling even a user having no knowledge of colors to readily carry out color adjustment, and an image display device. <P>SOLUTION: The image display device has a screen 20 for color adjustment used for the color adjustment and a cursor 1. The color assigned by the cursor 1 on the color adjustment screen 20 is subjected to coordinate display of the density of the color and hue corresponding to the brightness possessed by the assigned color on a first color plane 51 and further, the target color which is a target is subjected to coordinate display of the density of the color and hue corresponding to the brightness on a second color plane 53 and is subjected to color conversion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display mode when color-adjusting an image displayed on a display medium such as a screen or a display by a projector, a DVD player, a personal computer, or the like.

  A projector that enlarges and projects an image based on an input video signal onto a screen or the like includes a color adjustment unit that allows a user to adjust the color of the image in accordance with the color scheme of the video signal and human visual characteristics. desired.

The image correction apparatus of Japanese Patent Application No. 2004-112817 displays a color adjustment screen including an adjustment color palette and a target color palette on a display screen, displays an xy chromaticity diagram, displays a color, and becomes a target. Let the color control.
JP 2002-262218 A

  However, in the display mode of Japanese Patent Application No. 2004-112817, since the color is displayed in a two-dimensional space (saturation, hue) called an xy chromaticity diagram, the color when brightness (Y) is controlled. There is a problem that it is difficult to grasp the degree of state change three-dimensionally (brightness, saturation, hue), and as a result, it is difficult for the user to change the color by brightness control.

  Therefore, the present invention displays a color to be adjusted and a target color on a color plane or color circle in a three-dimensional color space so that even a user who does not have color knowledge can easily perform color adjustment, and coordinates are included therein. An object of the present invention is to provide an image display method and an image display apparatus capable of adjusting color conversion while displaying.

  An image display device that achieves this object includes a color adjustment screen that is specified by the user on the image display screen and performs color adjustment, and the hue, color intensity (saturation), and brightness (brightness) of the specified color. ) And an adjustment color display means for displaying the coordinates of the color instructed by the target color specification means. The adjustment color display means is a color density and hue with respect to brightness. A first color plane that displays a color density corresponding to the brightness of the designated color and a hue color distribution, and the brightness of the color determined by the target color designating means. And a second color plane for displaying the corresponding color intensity and hue color distribution.

  According to this configuration, it is possible to display a hue / saturation display surface corresponding to lightness in a three-dimensional color space, and display the coordinates of the adjustment color on the hue / saturation display surface. Or a hue / saturation display surface corresponding to the lightness of the target color can be displayed, and color adjustment can be performed while confirming the display of the color change state locus.

  Such a display mode has an effect that even a user who does not have color knowledge can easily realize a color change from a currently displayed color to a target color.

  Hereinafter, embodiments of the present invention will be described.

<Overview>
FIG. 1 is a diagram showing a usage form of a projector according to an embodiment of the present invention.

  In the figure, a projector 100 internally processes a video signal from a personal computer 150 connected to an input terminal, develops it on a liquid crystal panel, and displays it on a screen 160 in an enlarged manner. When an instruction is given to perform color adjustment by operating the user's mouse 130 during the display, the projector 100 divides the image displayed on the screen 160 into two left and right areas, and one area of the original color is displayed. The other area is displayed, and the other area is color-converted according to the color designated by the user.

  FIG. 2 shows an example of a display mode at the time of color adjustment.

  When the user moves the mouse 130 while the image is displayed, a cursor is displayed on the image as shown in FIG. When the cursor is moved by a mouse operation and left-clicked at an appropriate position, as shown in FIG. 2B, a boundary line 2 that divides the image into two left and right regions is displayed, and a color adjustment screen 20 is also displayed. The The color adjustment screen 20 is a screen for a user to input a color adjustment instruction. The color adjustment screen 3 displays a color to be color-adjusted, and the target color palette 5 displays an adjusted color. , Adjustment color display means for indicating the coordinates of the color of the adjustment palette 3 in the three-dimensional color space, the hue to be determined, hue (saturation), and brightness (lightness) The target color designating means 6 designated by a designated scale can be input by a mouse operation. When color adjustment is instructed from this screen, as shown in FIG. 2C, the area on the right side of the boundary line is displayed by changing the color portion specified as the adjustment target to the specified color, The area on the left side of the boundary line is displayed in its original color. When the mouse 130 left-clicks on the right area and inputs an instruction to approve the color change, as shown in FIG. 2D, the entire screen is color-converted based on the indicated color and displayed. Is done.

  FIG. 3 shows details of the color adjustment screen shown in FIG. The adjustment color display means 4 shows a three-dimensional colored color space indicating the color density and hue with respect to the brightness (vertical axis) from black to white, and the color indicated by the cursor corresponds to the brightness. The color distribution is displayed on the first color plane 51, and the color determined by the target color designation means on the right side of the color adjustment screen is displayed on the second color plane 53 with the color distribution corresponding to the brightness. Thereby, color conversion is realized while visually displaying the color state before color conversion to the color state after color conversion in three dimensions.

<Configuration>
A configuration for realizing such a display mode will be described below.

  FIG. 5 shows an external view of the projector 100.

  The projector 100 includes, as input terminals, a USB connection terminal 14, a video input terminal 11, an S video input terminal 12, and an RGB / YPbPr input terminal 13 to which a mouse 130 is connected on one side of the casing. Remote control light receiving unit 170 and lens 190 for inputting the above signal, and direction key 120 and determination button 110 are provided on the upper surface of the housing.

  FIG. 6 is a block diagram showing the configuration of the projector 100.

  The projector 100 includes a color conversion circuit 40, an on-screen processing circuit 50, a main microcomputer 70, and an external interface 71 as main parts of the invention. The front stage of the color conversion circuit 40 is provided with a part for preprocessing various input video signals, and the rear part of the on-screen processing circuit 50 is a processing part for developing the video signals on the liquid crystal panel for display. Is provided.

  Below, the structure of a front | former stage part and a back | latter stage part is demonstrated easily first, and the principal part is demonstrated later.

  The configuration of the previous stage is composed of a video input terminal 11, S video input terminal 12, RGB / YPbPr input terminal 13, color decoder 22, Y / C separation circuit 23, matrix circuit 24, A / D converter 30, resizing circuit 35, input It consists of selectors 21, 25 and 26.

  The video terminal 11, the S video input terminal 12, and the RGB / YPbPr input terminal 13 respectively input a terminal for inputting an NTSC composite video signal, a terminal for inputting an S video signal, and an RGB signal or a YPbPr signal. It is a terminal to do. Signals input from these terminals are processed by the color decoder 22, Y / C separation circuit 23, and matrix circuit 24 in accordance with the type of video signal standard of the signals, converted into RGB signals, and then converted into A signals. / D is input to the converter 30.

  The color decoder 22 is a decoder for color-decoding a Y / C separated signal or an inputted Y / C signal into a YPbPr signal.

  The Y / C separation circuit 23 is a circuit for separating the composite video signal input by the color decoder 22 into a Y signal and a C signal.

  The matrix circuit 24 is a circuit that reproduces an RGB signal by applying a predetermined process of the prior art to the YPbPr signal input from the YPbPr terminal.

  The A / D converter 30 is a converter for converting the analog signal selected by the input selector 26 into a 10-bit digital signal.

  The resizing circuit 35 is a circuit for resizing the digital signal according to the number of pixels of the LCD panels 91 to 93. The resizing circuit 35 temporarily stores the resized video signal in the internal memory, and outputs it to the color conversion circuit 40 in the scanning order while synchronizing with the synchronizing signal from the input selector 26. Also, if there is a freeze instruction from the main microcomputer 70, the updating of the internal memory is stopped, that is, the one frame of video signal accumulated when the instruction is given is kept, and it is determined by the video signal of the next frame. Then, the video signal held in the internal memory is repeatedly output to the color conversion circuit 40 in accordance with the frame frequency.

  The configuration of the rear stage portion is composed of digital phase expansion circuits 81, 82, 83, a panel driving IC 90, and LCD panels 91, 92, 93.

  The digital phase expansion circuits 81 to 83 are circuits for phase expansion of the digital signal color-corrected by the color conversion circuit 40 in consideration of the operation speed of the drive drivers (not shown) of the LCD panels 91 to 93.

  A panel driving IC (Integrated Circuit) 90 is a circuit for driving the LCD panels 91 to 93.

  The LCD panels 91 to 93 are panels for color-displaying digital signals color-corrected by the color conversion circuit 40 and phase-developed by the digital phase development circuits 81 to 83.

  Next, the configuration of the main part will be described.

  The color conversion circuit 40 divides the video signal for one frame output from the resizing circuit 35 into two regions at the boundary position instructed by the main microcomputer 70 in response to an instruction regarding color adjustment from the main microcomputer 70. The video signal of one area is output as it is, and the video signal of the other area is color-converted according to the color designated by the main microcomputer 70 and output.

  FIG. 7 is a block diagram showing a configuration of the color conversion circuit 40.

  In the figure, the color conversion circuit 40 includes a color conversion LUT (Look Up Table) 52, an output selector 55, a capture position control unit 58, and a switching control unit 56.

  The color conversion LUT 52 associates each value of all the color signals that can be input with each address of the internal memory, and holds the value of the color signal to be output to each address. When one color signal is input, the color conversion LUT 52 outputs a color signal held at an address corresponding to the color signal.

  In each address, a color signal having the same value as the input color signal is held as an initial value, and the contents of the address are rewritten later by a write operation by the main microcomputer 70 accompanying color adjustment.

  When the coordinates of the boundary position of the two-divided display are instructed from the main microcomputer 70, the switching control unit 56 stores the coordinates and outputs an appropriate switching signal to the output selector 55 to perform switching.

  FIG. 8 is a block diagram illustrating a configuration of the switching control unit 56.

  In the figure, the switching control unit 56 mainly includes a latch 561 and a counter 562. The latch 561 holds the coordinates of the boundary position input from the main microcomputer 70.

  The counter 561 detects the boundary between the two areas by counting the timing at which one pixel or one line of the video signal is input to the color conversion circuit 40, and carries out a carry-out, that is, a switching signal to the output selector 55 at the time of detection. Output.

  The output selector 55 outputs either the color signal input from the resize circuit 35 or the color signal from the color conversion LUT 52 to the on-screen processing circuit 50 in accordance with the switching signal from the switching control unit 56.

  More specifically, when the image is divided into right and left, the output selector 55 outputs the color signal input from the resizing circuit 35 as it is when the switching signal from the switching control unit 56 is input, and the latch and counter When the switching signal due to the same value is input, the color signal from the color conversion LUT 52 is output.

  Further, when the image is divided into upper and lower parts, the output selector 55 outputs the color signal input from the resizing circuit 35 as it is when the reset switching signal is input from the switching control unit 56, and the values of the latch and the counter are changed. When a switching signal resulting from the same value is input, the color signal from the color conversion LUT 52 is output.

  The capture position control unit 58 acquires the value of the color signal at the coordinate position designated by the main microcomputer 70 and outputs the color signal value to the main microcomputer 70. The coordinate position designated by the main microcomputer 70 corresponds to an image portion designated by the user by a mouse operation and subjected to color adjustment.

  Specifically, the capture position control unit 58 includes a horizontal synchronization signal counter and a pixel clock counter, and specifies a coordinate position specified by the main microcomputer 70, and acquires a color signal at the specified position. Output to the main microcomputer 70.

  With this configuration, for example, when the left click is pressed, the main microcomputer 70 that has received the input from the external interface 71 notifies the capture position control unit 58 of the coordinates included in the 20 pixel squares centered on the cursor position. To do. Then, the capture position control unit specifies the positions of the 20 pixels in all directions by the counts of the horizontal synchronization signal counter and the pixel clock counter, acquires the color signals included therein, and outputs them to the main microcomputer 70.

  The on-screen processing circuit 50 generates a three-dimensional image for on-screen display based on an instruction from the main microcomputer 70, and synthesizes this and the image of the video signal output from the color conversion circuit 40 for output. It is. In the present invention, the three-dimensional image for on-screen display is a color adjustment image and a boundary line that can display a color plane corresponding to the brightness for color adjustment.

  FIG. 3 shows an example of a color adjustment image and boundary lines that are displayed on-screen by the on-screen processing circuit 50.

  FIG. 4 is a diagram showing an adjustment display mode of the adjustment color display means 4 of FIG.

  In FIG. 3, an adjustment color palette 3 on the color adjustment screen 20 indicates colors to be subjected to color adjustment selected by the cursor 1.

  The adjustment color display means 4 indicates at which coordinates the color of the adjustment palette 3 is located in the three-dimensional color space, and the first color plane 51 is a plane color distribution having the brightness of the adjustment color palette 3. The coordinates corresponding to the darkness and hue of the color displayed above are shown as the adjustment color coordinates 54 in FIG.

  In order to make it easy for the user to see the adjustment color display means 4, the first color plane 51 is once erased. Further, the adjustment color display means displays the color to be determined by the target color designating means 6 on the second color plane 53 and displays it as the target color coordinate 57 in FIG. At that time, the color after color conversion is displayed on the target color palette 5.

  The boundary line 2 is displayed with the following thickness, brightness, and saturation. First, when the screen size is SXGA (1280 pixels × 1024 pixels), the thickness is preferably 1% or less. For example, when the screen is divided into left and right, the thickness is 1% of 1280 pixels, that is, 12 pixels or less. In addition, it is desirable that the saturation is achromatic and the brightness is variable, but if it is not variable, it is desirable to display at a brightness of 20 to 40% of the luminance of 100% of white. This is because human vision recognizes the boundary line as one of the images and is thought to adversely affect the recognition of the color of the entire image. Therefore, an attempt is made to reduce the influence of the boundary line as much as possible.

  The external interface 71 is input from various user operation units, that is, an input from the mouse 130 connected to the USB connection terminal 14, a signal from the remote control 140 input to the remote control light receiving unit 170, a direction key 120, and a determination button 110. This is an interface for transmitting to the main microcomputer 70 the depression of.

  The main microcomputer 70 performs all control of the entire apparatus such as power supply control, fan control, temperature control, and input switching control. In particular, the resizing circuit according to the user's mouse operation input through the external interface 71 during color adjustment. 35, various instructions are given to the color conversion circuit 40, the on-screen processing circuit 50, etc., and processing related to color adjustment is controlled.

  Hereinafter, processing relating to color adjustment of the main microcomputer 70 will be listed.

  (1) When the mouse 130 is moved, the direction key of the remote controller 140 is pressed, or the direction key 120 is pressed while the video is displayed, the main microcomputer 70 outputs a signal corresponding to the signal. When input from the external interface 71, the on-screen processing circuit 50 is instructed to display a cursor.

  To display the cursor, the main microcomputer 70 transmits to the on-screen processing circuit 50 an instruction to synthesize the cursor image and the image of the video signal, and the position coordinates of the position where the cursor is to be displayed. The on-screen processing circuit synthesizes the cursor image on the position coordinates of the image of the video signal accordingly.

  (2) Following this cursor display, if there is a left click of the mouse 130, pressing of the enter button on the remote controller 140 or press of the enter button 110 while the cursor is displayed, the main microcomputer 70 freezes the image in the resizing circuit 35. Instruct them to do so. In response to this instruction, the resizing circuit 35 interrupts resizing of the video signal of the next frame, and repeatedly outputs the video signal for one frame held in the internal memory to the color conversion circuit 40.

  (3) Subsequently, the main microcomputer 70 instructs the on-screen processing circuit 50 to display a boundary line. More specifically, the main microcomputer 70 acquires the position coordinates of the cursor when the left click or the enter button is pressed, and then, the position coordinates near the position coordinates and the boundary line image are obtained as the image of the video signal. Is transmitted to the on-screen processing circuit 50. Then, the on-screen processing circuit displays a vertical boundary line at the designated position coordinates.

  Here, the position coordinates in the vicinity of the position coordinates of the cursor are, for example, position coordinates on the left by 50 pixels from the position coordinates of the cursor.

  In short, in this case, the coordinate position of the cursor or an image in the vicinity thereof is set as a color adjustment target so that they are included in the region on the right side of the boundary line. In addition, the distance between the cursor position coordinates and the boundary line coordinates is set to about 50 pixels so that the color adjustment target part and the boundary line are not too far apart from each other. The part displayed in the original color on the left side is made easy for humans to see and compare.

  (4) Further, the main microcomputer 70 instructs the on-screen processing circuit 50 to display a color adjustment screen.

  More specifically, the main microcomputer 70 transmits to the on-screen processing circuit 50 an instruction to synthesize the image of the color adjustment screen and the image of the video signal and information about the configuration content of the color adjustment screen. .

  Here, the information about the configuration content is the color displayed on the color adjustment palette 3, the adjustment color designation unit 4 and the target color palette 5, and the position of the indicator of each scale displayed on the target color designation unit 6. .

  The main microcomputer 70 determines the initial value of information about the configuration contents as follows and transmits it to the on-screen processing circuit 60.

  That is, when the left microcomputer or the determination button is pressed, the main microcomputer 70 acquires the color values of 20 pixels square centered on the cursor position, that is, the color values of 400 pixels from the capture control unit 58. The most common color among the 400 pixels is set as the initial color of the adjustment color palette 3 and the target color palette 5. Further, the brightness of the initial color is calculated, and the first color plane and the adjustment color coordinate 53 corresponding to the brightness are displayed.

  (5) The main microcomputer 70 instructs the on-screen processing circuit 60 according to a mouse operation or the like performed on the color adjustment screen to update the configuration content of the color adjustment screen.

  More specifically, the instruction to update the color of the small raw color palette and the first color plane 51 whenever the capture location of the cursor 1 is changed by a mouse operation or the like, and the indicators of the designated scales 601 to 603 of the target color designating means 6 are displayed. The updated color of the adjustment color palette 3 is indicated.

  When the indicator position of the designated scale 601 to 603 is moved by a mouse operation or the like, the color value, the brightness of the color, and the second color plane 53 to be displayed are calculated according to the moved indicator position. Then, the target color palette 5, the second color plane 53, and the target color coordinate 57 are displayed as the calculated results.

  (6) When the color adjustment screen is displayed and left-clicked with the cursor placed on an image portion other than the screen, the main microcomputer 70 instructs the color conversion circuit 40 to The area on the right side of the boundary line is converted to the color specified on the color adjustment screen. More specifically, the main microcomputer 70 acquires the color value of the adjustment color palette 3 and the color value of the target color palette 5, and an address corresponding to the color value of the adjustment color palette 3 in the color conversion LUT 52. The color value of the target color palette 5 is written in Further, the main microcomputer 70 transmits the coordinates of the boundary line to the switching control unit 56 and instructs to perform switching.

  In response to this, the color conversion circuit 40 outputs the video signal on the left side of the boundary line as it is, switches the selector 55 when it reaches the boundary line, and the video signal on the right side of the boundary line is converted by the color conversion LUT 52. Output video signal.

  (7) In the state where the video signal on the right side of the boundary line is displayed after color conversion, when the image portion other than the color adjustment screen is left-clicked again, the main microcomputer 70 performs switching control of the color conversion circuit 40. The unit 56 is instructed to output all video signals of one frame through the color conversion LUT 52.

  As a result, the entire image of one frame is color-converted and displayed.

<Operation>
The operation of the projector 100 configured as described above will be described below.

  FIG. 9 is a flowchart showing the operation of the projector 100.

  When the mouse 130 is moved while an image is displayed as shown in FIG. 1, the main microcomputer 70 instructs the on-screen processing circuit 50 to display a cursor as shown in FIG. 2A (step S111). ).

  The main microcomputer 70 instructs the display position of the cursor to the on-screen processing circuit 50 so that the cursor is moved in accordance with the movement of the mouse 130 (step S112).

  When the mouse 130 is left-clicked, the main microcomputer 70 acquires the coordinates of the display position of the cursor at that time, and generates an x coordinate at a position 50 pixels to the left of the position and a vertical boundary line. Is transmitted to the on-screen processing circuit 50 (step S113).

  At this time, the main microcomputer 70 transmits the coordinates of the 20 pixels in the center with the coordinates of the acquired cursor display position to the capturing position control unit 58 and acquires the color signal of each coordinate from the capturing position control unit 58. Then, the configuration content of the color adjustment screen is determined based on the acquired color signal, and information about the configuration content is transmitted to the on-screen processing circuit 50 to generate the color adjustment screen.

  Almost simultaneously with the processing in step S113, the main microcomputer 70 instructs the resizing circuit 35 to freeze the image (step S114).

  In response to these instructions, the resizing circuit 35 freezes the image by repeatedly outputting the image of one frame stored in the internal memory. The on-screen processing circuit 50 combines the vertical boundary line and the color adjustment screen with the image from the resizing circuit 35 and outputs the combined image. As a result, a display as shown in FIG. 2B is obtained (step S115).

  In response to the operation of the mouse 130 for the color adjustment screen, the main microcomputer 70 causes the on-screen processing circuit 50 to adjust the color palette 3, target color palette 5, first color plane 51, second color plane 53, adjustment color coordinates 54, The configuration content of the target color coordinate 57 is updated (step S116).

  When an image portion other than the color adjustment screen is left-clicked, the main microcomputer 70 updates the content of the color conversion LUT 52 in accordance with the content of the color adjustment screen and causes the switching control unit 56 to perform switching control. As a result, the color conversion processing circuit 40 outputs the video signal on the left side of the boundary line as it is, switches the output selector 55 when it reaches the boundary line, and the video signal on the right side of the boundary line is converted by the color conversion LUT 52. The video signal is output (step S117).

  When the color adjustment screen is operated with the mouse in the state of being divided and displayed in this way, the process returns to step S116 and is repeated (step S118). Alternatively, when an image other than the color adjustment screen is left-clicked, the main microcomputer 70 regards the end of the color adjustment (step S118) and ends the synthesis of the boundary line and the color adjustment screen in the on-screen processing circuit 50. In addition, the switching control unit 56 is instructed so that all video signals of one frame are output through the color conversion LUT 52, and the portion where the color conversion LUT 52 has been rewritten as shown in FIG. The color is converted and displayed (step S119).

  As described above, the projector 100 according to the present embodiment can display the color density and the hue plane corresponding to the brightness in the three-dimensional color space, and the coordinate of the adjustment color on the color plane. Can be displayed, and the color density and hue plane corresponding to the brightness of the target color can be displayed, so color adjustments can be made while checking the color change state trajectory, even for users without color knowledge. There is an effect that the color change from the displayed color to the target color can be easily realized.

<Other embodiments>
In addition, the present invention is not limited to the above embodiment, and may be implemented as follows.

  (1) The image display apparatus of the present invention is not limited to a projector, and any apparatus that displays an image on various display media such as a plasma display, a liquid crystal display, and a CRT may be used.

  (2) The switching control unit 56 may have a countdown configuration as shown in FIG. That is, the boundary coordinates are held in the latch by the main microcomputer 70, and when a horizontal synchronization signal is input, the counter sets the value held in the latch (step S121) and repeats the countdown (step S122). ) When the count value becomes 0 (step S123), a switching signal is output (step S124).

  (3) As shown in FIG. 11, the adjustment color display means 4 makes the rugby ball with the vertical axis the brightness axis from black to white in order to make the user understand the color density and hue color distribution more easily. Create a mold and map the colors so that the maximum circle area is the maximum density of red, green, and blue. Even in the display of such a three-dimensional color space, by displaying the first color plane 51 and the second color plane 52, it is possible to three-dimensionally display the adjustment color coordinates 54 and the target color coordinates 57 that are easily visible.

  (4) The adjustment color display means 4 is displayed in a luminance-color-difference color solid as shown in FIG. 3, but is not limited thereto, Munsell color-colored solid, PCCS color solid, Ostwald color solid, NCS color Color adjustment can also be performed by displaying a three-dimensional image or the like.

  Further, in order to display these color solids more visually and easily, a two-dimensional display is applied. For example, the color solid of FIG. 12A-1 is developed and FIG. 12A-2 is adjusted as shown in FIG. The color display unit 4 may be applied, or a two-dimensional hue-saturation diagram linked to the brightness adjustment as shown in FIG. 12B may be applied and displayed on the adjustment color display unit 4 of FIG. Good.

  (5) In the cursor display and the boundary line display, the on-screen processing circuit 50 displays and combines the images, but the boundary is displayed by the cursor display corresponding to the capturing position in the color conversion circuit 40 or the control from the main microcomputer 70. Lines may be displayed and combined.

  (6) In FIG. 4B, a coordinate locus 59 for displaying the coordinates of the target color on the second color plane and the locus of the conversion process from the coordinates of the color designated on the first color plane is displayed. The state of color conversion may be made easier to understand.

  (7) In FIG. 7, an arithmetic unit may be provided instead of the color conversion LUT 52.

  The calculation unit includes a circuit that performs a 3 × 3 matrix calculation on the RGB values of the color signal and a circuit that amplifies the gain of the matrix-calculated signal. The matrix coefficient and the gain coefficient are set by the main microcomputer 70. The matrix coefficient is a value that approximates the target color signal specified on the color adjustment screen.

  (8) The color conversion LUT 52 may be 8 × 8 × 8 bits, or may be 5 × 5 × 5 bits to reduce the memory capacity, and the remaining bits may be interpolated by an interpolation circuit. .

  (9) The processing of each component shown in FIGS. 6, 7, and 8 may be realized by a program executable by a computer.

  The image display apparatus and the image display method according to the present invention have an effect that even a user who does not have color knowledge can easily realize a color change from a currently displayed color to a target color. This is useful as a display mode for color adjustment of an image displayed on a display medium such as a screen or a display by a player, a personal computer or the like.

The figure which shows the utilization form of the projector which is one Embodiment of this invention The figure which shows an example of the display mode in the case of color adjustment The figure which shows the screen for color adjustment which is one Embodiment of this invention The figure which shows the adjustment display mode of an adjustment color display means External view of projector 100 Block diagram showing the configuration of the projector 100 Block diagram showing the configuration of the color conversion circuit 40 Block diagram showing the configuration of the switching control unit 56 Flowchart showing operation of projector 100 The figure showing the variation of the switching control part 56 The figure showing the variation of the screen 20 for color adjustment The figure showing the variation of the screen 20 for color adjustment

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Video input terminal 12 S video input terminal 13 RGB / YPbPr input terminal 14 USB connection terminal 21, 25, 26 Input selector 22 Color decoder 23 Y / C separation circuit 24 Matrix circuit 30 A / D converter 35 Resizing circuit 40 Color conversion circuit 50 On-Screen Processing Circuit 51 First Color Plane 52 Color Conversion LUT (Look Up Table)
53 Second Color Plane 54 Adjusted Color Coordinates 55 Output Selector 56 Switching Control Unit 57 Target Color Coordinates 58 Position Control Unit 59 Coordinate Trajectory 70 Main Microcomputer 71 External Interface 81-83 Digital Phase Expansion Circuit 90 Panel Drive IC
91-93 LCD panel 100 Projector

Claims (6)

A color adjustment screen for user-specified color adjustment on the image display screen,
Target color designating means for designating the hue, color density (saturation), and brightness (lightness) of the designated color;
Adjustment color display means for displaying the coordinates of the color designated by the target color designation means;
Consists of
The adjustment color display means includes
A three-dimensional color space showing the color depth and hue with respect to brightness,
A first color plane for displaying a color intensity corresponding to the brightness of the designated color and a color distribution of hue;
A second color plane for displaying the color intensity corresponding to the brightness of the color determined by the target color designating means and the color distribution of the hue;
An image display device having a function of displaying In the adjustment color display means,
Displaying the first color plane, displaying the coordinates of the designated color, erasing the first color plane;
The image display apparatus according to claim 1, wherein after the first color plane is erased, the second color plane is displayed, and coordinates of a target color on the second color plane are further displayed. An image display apparatus for displaying a locus of a conversion process from the coordinates of a target color on the second color plane and the coordinates of a color designated by the first color plane. Compositing the image of the cursor on the position coordinates of the image of the video signal;
Freezing the image,
Displaying a boundary line indicating a boundary that divides an area targeted for color adjustment into a color adjustment target part and an original color;
A step of displaying a color adjustment screen for adjusting the color of the target portion of the color adjustment;
Updating the configuration content of the color adjustment screen in response to an operation performed on the color adjustment screen;
Converting a color adjustment target portion divided by the boundary line into a designated color;
Converting all video signals of one frame into the indicated color;
Consisting of
In the step of displaying the color adjustment screen,
A three-dimensional color space showing the color depth and hue with respect to brightness,
Displaying a first color plane that displays a color density corresponding to the brightness of the original color, and a hue color distribution;
Displaying a second color plane that displays the color density corresponding to the brightness of the color of the color adjustment target portion and the color distribution of the hue;
An image display method comprising: In the step of displaying the color adjustment screen,
Displaying the first color plane;
Displaying the color coordinates of the color adjustment target portion;
Erasing the first color plane;
Displaying the second color plane after erasing the first color plane;
Displaying the coordinates of the target color on the second color plane;
The image display method of Claim 4 containing these. The image display method according to claim 4, further comprising a step of displaying a locus of the conversion process from the coordinates of the target color on the second color plane and the coordinates of the color designated by the first color plane.

Images