JP2012084955A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a luminance difference and a contrast difference between a right-eye image signal and a left-eye image signal of an image signal as well as to suppress occurrence of a color difference or a color contrast phenomenon in adjustment of the color difference.SOLUTION: Three-dimensional image signals of various formats are converted to side-by-side signals or top-and-bottom signals and displayed by a format conversion circuit 26. The converted image signals are displayed on a waveform monitor 44 corresponding to right and left images. The luminance levels and the signal amplitude levels of the right-eye and left-eye image signals are adjusted by an adjustment circuit 43. After the adjustment, the right-eye and left-eye image signals are adjusted to predetermined three-dimensional image signals with the adjustment data and the display devices 91 to 93 are driven.

Description

  The present invention relates to a display mode when adjusting a luminance difference and a color difference between images displayed on the left and right eyes in a 3D display of a three-dimensional (3D) video signal on a projector or a television.

  In recent years, 3D formats such as frame packing, side-by-side, top-and-bottom, and line alternative have been defined in HDMI Ver 1.4a, and the number of 3D displays has increased. The display method for stereoscopic viewing is being widened by driving at high speed and synchronizing with the active shutter glasses to display optimal stereo images for the left and right eyes.

  For these displays, TVs and projectors that can be driven frame by frame are often used, but the screen size of projectors in particular is large, so the amount of parallax in the input video signal increases, resulting in more stereoscopic images. Can be provided. However, the larger the screen size, the shorter the viewing distance, so video sickness and the video difference between the left and right eyes often cause biological discomfort.

  On the other hand, a normal projector has a function of adjusting a color adjustment function, a gamma adjustment function, brightness, and contrast adjustment with high accuracy. Since these functions are functions optimized for two-dimensional (2D) signals, there is no optimal adjustment function for 3D right-eye video and left-eye video, and this adjustment function is desired.

  As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

JP 2002-262218 A

  As a conventional color adjustment function, there is one of Patent Document 1 that adjusts a color in accordance with a user instruction.

  The image correction apparatus of Patent Document 1 arranges a reference window and a work window side by side on a single display screen, and displays the same image in both windows in a reduced size according to the size of the window. The user can adjust the color of the image of the work window by operating the mouse while referring to the image of the reference window as the original image. However, the two windows are images before and after correction of the same image. The 3D video signal corresponding to the left and right eyes cannot be adjusted.

  In addition, for various input formats input in HDMI 1.4a, a signal corresponding to two eyes such as side-by-side and top-and-bottom is not configured to be displayed on one display screen. It was difficult to adjust the video signal within the same screen.

  In addition, in the display mode of Patent Document 1, there is a problem that a color contrast phenomenon easily occurs and color adjustment is difficult.

  Here, the contrast phenomenon is a phenomenon in which a certain color is influenced by other colors and looks different from the actual color, and is caused by an illusion of human eyes.

  There are several types of contrast phenomena. In the case of the display mode of Patent Document 1, it is particularly easy to cause continuous contrast and area contrast. Continuation contrast is a phenomenon in which, when one color is viewed after another color is viewed, the complementary color of the first viewed color appears as an afterimage. For example, after seeing white, a black afterimage appears, and after looking red, a green afterimage appears.

  In the case of the display mode of Patent Document 1, when the image of the reference window is viewed for a while and then the image of the work window is viewed, the afterimage of the reference window appears to overlap the image of the work window due to continuous comparison. , It becomes difficult to recognize the original color. In addition, the afterimage of the reference window and the image of the work window overlap with each other because the size, outline, shape, etc. of the image are exactly the same, and the afterimage becomes darker by looking at the two windows alternately. Adjustment becomes more difficult. Area contrast is a phenomenon in which the characteristics of a color appear to increase as the area increases. For example, dark colors appear heavier and light colors appear lighter.

  In the case of the display mode of Patent Document 1, the apparatus reduces the image to be displayed on the entire display screen in accordance with the size of the window, so that the color characteristics of the image appear to be weakened, thereby recognizing the color correctly. I can't do that. Therefore, the present invention performs color adjustment by a display mode in which the luminance difference and contrast difference between the left-eye video signal and the right-eye video signal of the 3D video signal are suppressed, and the occurrence of the color contrast phenomenon during the color difference and color difference adjustment is suppressed. It is an object of the present invention to provide an image display device capable of performing the above.

  In order to solve the above-described problems, an image display apparatus according to the present invention includes means for inputting a 3D video signal, means for converting the 3D video signal into a side-by-side signal or a top-and-bottom signal, and displaying the left-eye to the converted video signal. A right-eye video brightness level display means is provided, and the brightness level and signal amplitude level of the left-eye right-eye video signal are adjusted. After the adjustment, the display device is driven to a predetermined 3D video signal.

  According to this configuration, the user can easily adjust the luminance level display means while displaying the luminance difference and contrast difference of the left and right eye video signals due to the performance difference of the camera, etc. The image for the eyes can be displayed.

  Also, means for inputting a 3D video signal, luminance level display means for left-eye right-eye video of the video signal, and means for dividing and displaying the video signal into left-eye right-eye video on the left and right or up and down, the luminance level of the left-eye right-eye video signal Then, the signal amplitude level is adjusted, and after the adjustment, the display device is driven into a predetermined 3D video signal.

  According to this configuration, since the user can adjust the left and right eye images in one continuous image that is not image-compressed, the left and right eye image variations can be suppressed, Color contrast can also be made difficult to adjust.

  Furthermore, color adjustment means is displayed on the converted left-eye and right-eye images, and the saturation, hue, or lightness is adjusted for at least one-eye image, so that accurate adjustment is performed for images having color components. Can do.

  In addition, since the gamma adjustment means is displayed on the left eye right eye image after the conversion and the gamma curve is adjusted for at least one eye image, the luminance level can be adjusted in all gradations.

  Further, the luminance level display means for the left-eye right-eye video signal in the converted video signal is positioned after the luminance level and signal amplitude level adjustment means for the left-eye right-eye video signal, so the result displayed by the luminance level display means is Since it is displayed by the adjusted data, easy adjustment can be realized as a user interface.

  Further, since the color adjusting means and the gamma adjusting means are arranged two by two to adjust the left-eye and right-eye images, respectively, not only the image of one eye but also the images of both eyes are optimized. be able to.

  According to the above configuration, the user can easily adjust the luminance level display means while displaying the luminance difference and contrast difference between the left and right eye video signals due to performance differences of the camera and the like.

  In addition, since the user can adjust the left and right eye images in a single continuous image that is not compressed, it is possible to suppress the left and right eye image variations and to generate a color contrast. It is difficult to adjust.

The figure which shows the utilization form of the projector which is one Embodiment of this invention The figure which shows the example of a format of 3D output video signal The figure which shows the input format example of 3D input video signal Block diagram showing the configuration of the projector 100 The figure which shows the resizing / waveform monitor generation circuit and keystone / gamma / color conversion circuit in the first embodiment The figure which shows the adjustment screen which displays the picture which corresponds to the right and left eyes and adjusts with the waveform monitor The figure which shows the resizing / waveform monitor generation circuit and keystone / gamma / color conversion circuit in the second embodiment The figure which displays the image | video corresponding to the right and left eyes in Embodiment 2, and shows color adjustment with a color adjustment menu

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

(Embodiment 1)
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 3D video signal from a BD player 150 connected to an input terminal, develops it on a liquid crystal panel, outputs the video in a frame-by-frame format, and displays it on a screen 160 in an enlarged manner. At the same time, the user can open and close the active shutter glasses 130 synchronized with the video corresponding to the right eye (hereinafter abbreviated as R) and the left eye (hereinafter abbreviated as L) of the frame-by-frame, and can view the 3D video.

  FIG. 2 is a diagram showing a frame-by-frame output method.

  The images of L and R are alternately switched at 120 Hz, and the active shutter glasses 130 of FIG. 1 are alternately opened L and R in accordance with the alternate images.

  FIG. 3 shows the format of the 3D video signal input to the projector 100. FIG. 6A shows a side-by-side format in which video is compressed in the horizontal direction, and L and R are in a format that can be displayed on one screen, and are input in a normal HD format, NTSC format, or the like. FIG. 4B shows a top-and-bottom method. This is a format in which video is compressed in the vertical direction so that L and R can be displayed on one screen, and this is also input in the normal HD system or NTSC system. FIG. 6C shows a frame packing system, which is not vertically compressed unlike the top and bottom system of FIG. 5B, and has a format in which the clock rate is doubled. For this reason, if L and R are to be displayed on the HD screen or NTSC system on one screen, format conversion at the time of adjustment is required. (D) is a line alternative system, and L and R are alternately displayed for each line. Therefore, in this system as well, in order to make an image that does not appear to be a jaggy of video shift due to parallax on one screen during adjustment. Requires a format conversion as shown in FIG.

  FIG. 4 is a block diagram illustrating the configuration of the projector 100. The projector 100 includes a resize / waveform monitor generation circuit 40, a keystone / gamma / color conversion circuit 50, a main microcomputer 70, and a memory 71 as main parts of the invention.

  Below, a structure is demonstrated about the relationship between a front | former stage part and a back | latter stage part.

  The configuration of the previous stage is composed of a video input terminal 11, an S video input terminal 12, a color decoder 22, a Y / C separation circuit 23, an A / D converter 30 corresponding to an analog input, an HDMI input terminal 13, and an HDMI receiver. It consists of 24 corresponding to digital input. Video signals input from the video input terminal 11 and the S video input terminal 12 are processed by the color decoder 22 and the Y / C separation circuit 23 and converted into RGB signals according to the type of video signal standard of the signals. Above, it is input to the A / D 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 A / D converter 30 is a converter for converting the analog signal selected by the input selector 25 into a 10-bit digital signal.

  On the other hand, various 3D format video signals and 2D video signals defined by HDMI 1.4a are input from the HDMI input terminal 13 and converted into parallel signals by the HDMI receiver 24. Each input is selected by the input selector 25 and input to the resize / waveform monitor generation circuit 40. At this time, when the luminance / contrast correction and the gamma / color conversion of the LR video signal of the present invention are performed, the format conversion circuit 26 converts the LR video signal into the side-by-side or top-and-bottom format in advance. However, if the input signal itself is in a side-by-side or top-and-bottom format, it is input to the resize / waveform monitor generation circuit 40 without conversion. The 2D signal is resized and input to the keystone / gamma / color conversion circuit 50 as usual in the resize / waveform monitor generation circuit 40, is subjected to correction processing, and is input to the digital phase expansion circuits 81, 82, 83 in the subsequent stage. The In the case of 3D signals, LR signals in side-by-side or top-and-bottom format at the time of adjustment are each subjected to keystone correction, a waveform monitor is generated and controlled from the main microcomputer 70, and brightness / contrast (signal amplitude), gamma, and color conversion are performed. The adjustment data is stored in the memory 71. Next, the waveform monitor is canceled, the conversion by the format conversion circuit 26 performed for adjustment is restored, and the optimum resizing without degradation of resolution is performed in the subsequent frame-by-frame, and the result is input to the subsequent portion.

  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 digital signals on a frame-by-frame basis in consideration of the operation speed of 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 displaying in color the digital signals phase-expanded by the digital phase expansion circuits 81 to 83 at 120 Hz in the case of 3D video signals.

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

  When the luminance monitor and the contrast are adjusted by displaying the waveform monitor of the present invention, the format conversion circuit 26 converts the format into a side-by-side or top-and-bottom format in advance. FIG. 5 is a diagram showing internal circuits of the resize / waveform monitor generation circuit 40 and the keystone / gamma / color conversion circuit 50.

  The LR video signals converted by the format conversion circuit 26 are converted into YPbPr signals by the matrix circuit (MTX) 41, respectively, and then converted by the resizing circuit 42 to the optimum pixel number and vertical frequency for the display pixel number. Next, the waveform monitor 10 as shown in FIG. 6 is displayed on the upper part of the screen by the circuit of the 3D waveform monitor 44. Here, the luminance / contrast adjustment unit 43 can compare the left and right images and adjust the right with reference to the left screen, or adjust the left with reference to the right screen. Furthermore, it is also possible to adjust the left and right respectively.

  Furthermore, each LR signal is adjusted by the keystone circuit 51 after the keystone correction by the gamma circuit 52 and the color conversion circuit 53, respectively, and the difference in the video signal due to the shooting variation of the camera of the LR 3D video signal is corrected. By displaying 3D images with balanced left and right eyes in each eye, it is possible to provide 3D images with less biological fatigue.

(Embodiment 2)
The basic configuration of the projector 100 is the same as shown in FIG.

  The difference from the first embodiment is that a 1 / 2H switch 54 is provided as shown in FIG. By having this 1 / 2H switch 54, it is not a video having only two parallaxes that differ only in parallax as in the side-by-side signal, but instead of displaying one screen at the center of the screen as shown in FIG. This has the advantage that the color can be adjusted without causing a contrasting phenomenon to the eyes. The color adjustment screen 1 shown in FIG. 7 is displayed for the video after the keystone correction and gamma adjustment are performed, and when the color to be adjusted is determined with the cursor 2, the color is displayed in the adjustment color palette 3. Is displayed. Next, the target color palette 5 displays the results adjusted by the respective parameter hues 601, color intensity 602, and brightness 603 of the target color designating means 6 to determine the target color. Finally, when this color conversion is canceled, the switching by the 1 / 2H switch 54 is canceled and output in the output format as a predetermined 3D signal.

  In this case, the previous adjustment data is stored in the memory 71 at the time of output, and is output in a corrected state based on the data.

  As described above, in the input 3D video signal in any of the first and second embodiments, the difference between the left and right luminances and contrast colors of the LR video can be suppressed very easily. It has an effect that can be.

  The image display device according to the present invention has an effect capable of suppressing the luminance difference and the color difference between the left and right images of a 3D image, and displays a high-definition and high-resolution display such as a projector, a television, or a 3D display high-definition. Suitable for any use.

DESCRIPTION OF SYMBOLS 1 Color adjustment screen 2 Cursor 3 Adjustment color palette 5 Target color palette 6 Target color designation means 11 Video input terminal 12 S video input terminal 13 HDMI input terminal 21, 25 Input selector 22 Color decoder 23 Y / C separation circuit 24 HDMI receiver 26 Format Conversion Circuit 30 A / D Converter 40 Resize / Waveform Monitor Generation Circuit 50 Keystone / Gamma / Color Conversion Circuit 70 Main Microcomputer 71 Memory 81-83 Digital Phase Expansion Circuit 90 Panel Drive IC
91-93 LCD panel 100 Projector

Claims (6)

  Means for inputting a 3D video signal; means for converting and displaying the 3D video signal into a side-by-side signal or a top-and-bottom signal; and means for displaying a luminance level of a left-eye right-eye video in the converted video signal; An image display apparatus comprising: means for adjusting a luminance level and a signal amplitude level of the left-eye right-eye video signal; and means for driving the display device into a predetermined three-dimensional video signal after the adjustment.   Means for inputting a three-dimensional video signal; luminance level display means for left-eye right-eye video of the video signal; means for split-displaying the video signal into left-eye right-eye video left and right or up and down; and brightness level of the left-eye right-eye video signal An image display apparatus comprising: means for adjusting a signal amplitude level; and means for driving a display device into a predetermined three-dimensional video signal after adjustment by the adjusting means.   3. The image display device according to claim 1, wherein color conversion means is displayed on the converted left-eye and right-eye images, and saturation, hue, and brightness are adjusted for at least one-eye image. 4.   3. The image display device according to claim 1, wherein a gamma adjustment unit is displayed on the converted left-eye and right-eye images, and a gamma curve is adjusted on at least one of the images.   3. The image according to claim 1, wherein luminance level display means for left-eye right-eye video in the converted video signal is located after the luminance level and signal amplitude level adjustment means for the left-eye right-eye video signal. Display device.   3. The image display device according to claim 1, wherein the color adjusting unit and the gamma adjusting unit are arranged two each to adjust each of the left-eye and right-eye images.

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