WO2010116432A1 - Appareil de traitement d'images, appareil d'affichage, procédé de traitement d'images, programme et support d'enregistrement - Google Patents

Appareil de traitement d'images, appareil d'affichage, procédé de traitement d'images, programme et support d'enregistrement Download PDF

Info

Publication number
WO2010116432A1
WO2010116432A1 PCT/JP2009/006859 JP2009006859W WO2010116432A1 WO 2010116432 A1 WO2010116432 A1 WO 2010116432A1 JP 2009006859 W JP2009006859 W JP 2009006859W WO 2010116432 A1 WO2010116432 A1 WO 2010116432A1
Authority
WO
WIPO (PCT)
Prior art keywords
pixel
sub
redistribution
pixels
divided
Prior art date
Application number
PCT/JP2009/006859
Other languages
English (en)
Japanese (ja)
Inventor
宮田英利
山根康邦
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2010116432A1 publication Critical patent/WO2010116432A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0135—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving interpolation processes

Definitions

  • the present invention relates to an image processing apparatus and an image processing method for upscaling the resolution of input image data to a high resolution.
  • a pixel division method described in Patent Document 1 is generally known as a method for solving such problems related to viewing angle characteristics.
  • the pixel dividing method is a technique in which one pixel is divided into a plurality of regions, and different voltages are applied to the divided regions (divided pixels). According to this method, the brightness floating can be suppressed and the viewing angle characteristics can be improved.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 4-102830 (published on April 3, 1992)”
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a high-resolution image processing apparatus that converts the resolution of input image data to a high resolution without complicating drive processing.
  • An object of the present invention is to provide an image processing apparatus capable of generating an image and improving the viewing angle.
  • the image processing apparatus of the present invention includes an upscaling processing unit for upscaling the resolution of RGB input image data to a high resolution that is n times higher.
  • An image processing apparatus to be displayed on a display unit wherein one pixel before upscaling corresponds to n divided pixels after upscaling, and each divided pixel includes a plurality of subpixels corresponding to RGB. Then, with respect to the input image data corresponding to one pixel, the gradation value that has been upscaled by the upscaling processing unit and assigned to the plurality of subpixels corresponding to the pixel is redistributed among the subpixels.
  • a redistribution processing unit wherein the redistribution processing unit regards each of the sub-images in each divided pixel when the n divided pixels after the upscaling are regarded as one pixel.
  • the gradation value assigned to each pixel is redistributed among the sub-pixels in the divided pixel, and the gradation value assigned to each sub-pixel is changed between the sub-pixels in the pixel for each RGB. It is characterized by redistributing with.
  • the gradation values assigned to the sub-pixels corresponding to RGB that have been upscaled are redistributed among the sub-pixels in the divided pixels, and re-distributed between the sub-pixels in the pixel for each RGB.
  • Distribute. Therefore, for example, before and after the redistribution, the subpixels of each of the RGB of one whole pixel (in one pixel) without changing the luminance of one whole divided pixel and the chromaticity of one whole pixel.
  • the luminance difference can be increased between sub-pixels of the same color. Thereby, the viewing angle can be improved while obtaining a high-definition image by the upscaling process.
  • the viewing angle can be improved by distributing the gradation value among the sub-pixels, there is no need to newly divide the pixel to improve the viewing angle, and the panel transmittance is reduced and writing to the pixel is performed. There is no shortage of time.
  • a display device includes the image processing device and a display unit that displays image data upscaled by the image processing device.
  • the image processing method of the present invention includes an upscaling process step for upscaling the resolution of RGB input image data to n times higher resolution, and displays the upscaled image data.
  • one pixel before upscaling corresponds to n divided pixels after upscaling, and each divided pixel includes a plurality of subpixels corresponding to RGB.
  • Redistribution processing for redistributing gradation values assigned to a plurality of sub-pixels corresponding to the pixel after the up-scale processing step is performed on the input image data corresponding to one pixel.
  • a display step of displaying image data on the display unit based on the gradation values redistributed by the redistribution processing step In the redistribution processing step, when the n divided pixels after the upscaling are regarded as one pixel, the gradation value assigned to each sub pixel in each divided pixel is changed to the sub-pixel in the divided pixel. In addition to redistribution among the pixels, the gradation value assigned to each subpixel in each pixel is redistributed among the subpixels in the pixel for each RGB.
  • the image processing method it is possible to obtain the effect produced by the image processing apparatus. That is, a high-definition image can be generated and the viewing angle can be improved without complicating the driving process.
  • the image processing apparatus may be realized by a computer.
  • Possible recording media are also included in the scope of the present invention.
  • the gradation value assigned to each sub-pixel is redistributed among the sub-pixels in the divided pixel, and each pixel In FIG. 5, the gradation value assigned to each sub-pixel is redistributed among the sub-pixels in the pixel for each RGB.
  • the image processing apparatus and the image processing method of the present invention it is possible to generate a high-definition image and improve the viewing angle without complicating the driving process.
  • FIG. 1 It is a block diagram which shows schematic structure of the display apparatus provided with the image processing apparatus which concerns on this invention. It is a schematic diagram for demonstrating the processing content of the image processing apparatus of FIG. It is a schematic diagram which shows the specific example of the processing content of the image processing apparatus of FIG. It is a schematic diagram which shows the specific example of the processing content of the image processing apparatus of FIG. It is a graph which shows the relationship between the gradation value of input image data, and a brightness
  • 3 is a graph showing luminance characteristics when displayed by image data after redistribution obtained by the image processing apparatus of FIG. 1.
  • 3 is a graph showing luminance characteristics when displayed by image data after redistribution obtained by the image processing apparatus of FIG. 1.
  • FIG. 1 is a block diagram showing a schematic configuration of a display device 1 according to the present embodiment.
  • the display device 1 includes an image processing device 10 and a liquid crystal display panel (display unit) 2.
  • the image processing apparatus 10 includes an upscale circuit (upscale processing unit) 11, a redistribution circuit (redistribution processing unit) 12, and a liquid crystal drive circuit 13.
  • the upscaling circuit 11 performs upscaling processing on the video signal X (image data) input to the image processing apparatus 10 and outputs upscaled image data (upscaled image data) to the redistribution circuit 12. .
  • the upscale circuit 11 includes a division processing unit (not shown) that divides input image data into a plurality of divided image data. In the present embodiment, as an example, it is assumed that 2K1K class high-definition data is input to the upscale circuit 11. Details of the upscaling process will be described later.
  • the redistribution circuit 12 performs redistribution processing for redistributing the gradation values of the upscaled image data input from the upscale circuit 11, and drives the redistributed image data (image data after redistribution) by liquid crystal Output to the circuit 13. Details of the redistribution processing will be described later.
  • the liquid crystal drive circuit 13 controls the liquid crystal display panel 2 on the basis of the redistributed image data (tone value) input from the redistribution circuit 12 and causes the liquid crystal display panel 2 to display the redistributed image.
  • the liquid crystal display panel 2 is controlled by the liquid crystal drive circuit 13 and displays an image corresponding to the image data that has been upscaled and redistributed by the image processing apparatus 10.
  • a liquid crystal display panel having 4096 pixels in the horizontal direction and 2160 pixels in the vertical direction (4K2K class) is used.
  • the input image data for the image processing apparatus 10 is 1920 ⁇ 1080 and the display size of the liquid crystal display panel 2 is 4096 ⁇ 2160
  • the input image data is upscaled (expanded) twice to 3840 ⁇ . 2160.
  • the size in the horizontal direction (3840 dots) is smaller than the display size (4096 dots)
  • it is necessary to display the image of the left half divided area by shifting to the right by 2048-1920 128 dots.
  • the correction process for shifting the left half image to the right may be performed in any part in the image processing apparatus 10.
  • the display capacity of the liquid crystal display panel is not limited to this.
  • a liquid crystal display panel is used as the display unit.
  • the present invention is not limited to this.
  • a display unit including a plasma display, an organic EL display, or a CRT may be used.
  • a display control unit corresponding to the display unit may be provided.
  • the image processing apparatus 10 performs the upscaling process on the input image data, and the 4K2K video signal X is input.
  • Image data after upscaling is generated, and the redistribution circuit 12 performs a process of redistributing gradation values on the image data after upscaling to generate image data after redistribution.
  • the liquid crystal driving circuit 13 generates a video signal corresponding to the redistributed image data (gradation value) in which the gradation value is redistributed (converted) by the redistribution circuit 12, and an image corresponding to the video signal is generated. Is displayed on the liquid crystal display panel 2.
  • FIG. 2 is a schematic diagram for explaining the processing contents of the image processing apparatus 10.
  • Reference numeral 21 in this figure indicates image data corresponding to one pixel of 2K1K input image (original image) data
  • reference numeral 22 indicates 4K2K post-upscale image data that has been upscaled by the upscale circuit 11. Is shown.
  • reference numeral 21 denotes a pixel before upscaling
  • reference numeral 22 also denotes a pixel after upscaling.
  • description will be given focusing on one pixel among a plurality of pixels constituting the input image data.
  • RGB original image data (input data) 21 corresponding to one pixel is input to the upscale circuit 11 (see FIG. 1) and upscaled four times (upscale processing step).
  • the input data PR is upscaled to R subpixel data R1, R subpixel data R2, R subpixel data R3, R subpixel data R4, and the input data PG is G subpixel data G1.
  • G subpixel data G2, G subpixel data G3, G subpixel data G4, and the input data PB is B subpixel data B1, B subpixel data B2, B subpixel data B3, B subpixel data. Upscaled to B4.
  • one upscaled pixel corresponding to the input data 21 is composed of four divided pixels P1, P2, P3, and P4.
  • the divided pixel P1 is composed of sub-pixels R1, G1, and B1
  • the divided pixel P2 is composed of sub-pixels R2, G2, and B2
  • the divided pixel P3 is sub-pixel R3.
  • the divided pixel P4 includes sub-pixels R4, G4, and B4.
  • the luminance values Y1 to Y4 of the divided pixels P1 to P4 after upscaling are expressed by the following equations.
  • LR (x), LG (x), and LB (x) are functions that convert the gradation value x into a luminance value (cd / m 2 ).
  • the gradation value x of the sub-pixel R1 is defined as R1
  • the gradation value x of the sub-pixel G1 is defined as G1.
  • Y1 LR (R1) + LG (G1) + LB (B1) (1)
  • Y2 LR (R2) + LG (G2) + LB (B2) (2)
  • Y3 LR (R3) + LG (G3) + LB (B3) (3)
  • Y4 LR (R4) + LG (G4) + LB (B4) (4)
  • the redistribution circuit 12 has the luminance represented by the image data of the upscaled divided pixels P1 to P4 (divided pixels P1 to P4 before redistribution) and the image of the divided pixels P1 to P4 after redistribution.
  • the luminance values are redistributed between RGB so that the luminance represented by the data is equal to each other (does not change).
  • the luminance represented by the image data R1, G1, B1 before redistribution and the luminance represented by the image data R1 ′, G1 ′, B1 ′ after redistribution are mutually
  • the luminance values of the image data R1, G1, and B1 are distributed (increased or decreased) to each other so as to be equal.
  • the luminance represented by the image data R2, G2, B2 before redistribution and the luminance represented by the image data R2 ′, G2 ′, B2 ′ after redistribution are equal to each other.
  • the luminance values of the image data R2, G2, and B2 are distributed (increased or decreased) to each other.
  • the luminance represented by the image data R3, G3, and B3 before redistribution and the luminance represented by the image data R3 ′, G3 ′, and B3 ′ after redistribution are equal to each other.
  • the luminance values of the image data R3, G3, and B3 are distributed (increased or decreased) to each other.
  • the luminance represented by the image data R4, G4, and B4 before redistribution and the luminance represented by the image data R4 ′, G4 ′, and B4 ′ after redistribution are equal to each other.
  • the luminance values of the image data R4, G4, and B4 are distributed (increased or decreased) to each other.
  • the redistribution processing (redistribution processing step) of the luminance value among the sub-pixels RGB is performed in each divided pixel so as to satisfy the following expressions with respect to the above expressions (1) to (8).
  • Y1 Y1 ′ (9)
  • Y2 Y2 ′ (10)
  • Y3 Y3 ′ (11)
  • Y4 Y4 ′ (12)
  • the redistribution circuit 12 is a color represented by image data (image data after upscaling: R1 to R4, G1 to G4, B1 to B4) of each subpixel after upscaling (subpixel before redistribution).
  • the chromaticity represented by the image data of each subpixel after redistribution (image data after redistribution: R1 ′ to R4 ′, G1 ′ to G4 ′, B1 ′ to B4 ′) for each RGB pixel
  • the luminance values are redistributed among the sub-pixels of each color so as to be equal to each other.
  • the luminance is represented by the sum of luminance represented by the image data R1, R2, R3, and R4 before redistribution, and the image data R1 ′, R2 ′, R3 ′, and R4 ′ after redistribution.
  • the luminance values of the image data R1, R2, R3, and R4 are redistributed with each other so that the total sum of the luminances is equal to each other.
  • the sum of the brightness represented by the image data G1, G2, G3, and G4 before redistribution and the sum of the brightness represented by the image data G1 ′, G2 ′, G3 ′, and G4 ′ after redistribution Are redistributed to each other so that the brightness values of the image data G1, G2, G3, and G4 are equal to each other.
  • the sum of the brightness represented by the image data B1, B2, B3, B4 before redistribution and the sum of the brightness represented by the image data B1 ', B2', B3 ', B4' after redistribution Are redistributed to each other so that the brightness values of the image data B1, B2, B3, and B4 are equal to each other.
  • the chromaticity can be redistributed equally.
  • CR ′ LR (R1 ′) + LR (R2 ′) + LR (R3 ′) + LR (R4 ′) (16)
  • CG ′ LG (G1 ′) + LG (G2 ′) + LG (G3 ′) + LG (G4 ′) (17)
  • CB ′ LB (B1 ′) + LB (B2 ′) + LB (B3 ′) + LB (B4 ′) (18) Then, within one pixel, luminance value redistribution processing is performed among a plurality of R sub-pixels, and luminance value redistribution processing is performed among a plurality of G sub-pixels so that the following equation is satisfied.
  • a luminance value redistribution process (redistribution process step) is performed between the B sub-pixels.
  • CR CR ′ (19)
  • CG CG '(20)
  • CB CB '(21)
  • LR (x), LG (x), and LB (x) are defined as values corresponding to output luminances for the R, G, and B gradation values x, respectively.
  • LR (x) corresponds to the output luminance when a data signal (gradation value x) is input to the R pixel of the liquid crystal display panel and a 0 data signal is input to the G pixel and the B pixel.
  • L R, LR (x) L R ⁇ L 0 Is defined as follows.
  • L 0 corresponds to output luminance when a data signal of 0 is input to all of the R pixel, G pixel, and B pixel (note that the liquid crystal panel has a slight luminance output even when the input signal is 0).
  • LG (x) and LB (x) are the same, and are functions for obtaining a luminance equivalent value.
  • the characteristics of this function vary depending on the specifications of the liquid crystal display panel, it is necessary to match each characteristic.
  • the liquid crystal display panel 2 Image data is displayed (display step).
  • the gradation value assigned to the subpixels corresponding to RGB by the upscaling processing unit can be redistributed among the subpixels in the divided pixels. Further, the gradation value assigned to the sub-pixel can be redistributed among the sub-pixels in the pixel for each RGB. Therefore, for example, before and after the redistribution, the subpixels of the respective RGB (the same color) of each of the entire divided pixels are not changed without changing the luminance of the entire divided pixel and the chromaticity of the entire pixel. The luminance difference between the sub-pixels) can be increased. Thereby, the viewing angle can be improved while obtaining a high-definition image by the upscaling process. In addition, since RGB chromaticity can be adjusted, display quality is not deteriorated. Note that the gradation value redistributed in the redistribution processing unit is determined according to the luminance and the pixel size.
  • the redistribution circuit 12 increases the scale difference between the subpixels of the luminance represented by each subpixel after the redistribution by the redistribution circuit 12 in each pixel. It is preferable to redistribute the gradation values of the sub-pixels so that the difference between the sub-pixels in luminance represented by each sub-pixel after the upscaling by the circuit 11 is greater.
  • the difference between the luminance value (LR (R3 ′)) and the luminance value (LR (R4 ′)) of the sub-pixel R4 ′ is the difference between the luminance value (LR (R1)) of the sub-pixel R1 after the upscaling and the sub-pixel R2.
  • the luminance between the sub-pixels is larger than the difference between the luminance value (LR (R2)), the luminance value of the sub-pixel R3 (LR (R3)) and the luminance value of the sub-pixel R4 (LR (R4)). Redistribute values.
  • the luminance value (LR (R1 ')) of the sub-pixel R1', the luminance value (LR (R2 ')) of the sub-pixel R2', and the luminance of the sub-pixel R3 ' Out of the value (LR (R3 ′)) and the luminance value (LR (R4 ′)) of the sub-pixel R4 ′, the luminance value of the sub-pixel having the maximum luminance value and the luminance value of the sub-pixel having the minimum luminance value Are the luminance value of the sub-pixel R1 (LR (R1)), the luminance value of the sub-pixel R2 (LR (R2)), the luminance value of the sub-pixel R3 (LR (R3)), and Of the luminance values (LR (R4)) of the sub-pixel R4, the sub-pixel is set to be larger than the difference between the luminance value of the sub-pixel having the maximum luminance value and the luminance value of the sub-pixel having the minimum luminance value.
  • one divided pixel is composed of RGB sub-pixels
  • a distribution ratio may be set for each sub-pixel and redistribution processing may be performed individually. Since the contribution to luminance differs for each sub-pixel, even if the luminance difference between sub-pixels is a high luminance difference of 100 cd / m 2 or more, for example, the luminance change before and after redistribution per divided pixel is Can be suppressed. Therefore, redistribution processing is possible even for such a high luminance difference.
  • the redistribution processing can be performed for each sub-pixel, the redistribution processing function can be turned on / off for each sub-pixel.
  • the redistribution circuit 12 matches the center position of the luminance in the divided pixel after the redistribution with the center position of the divided pixel, and the chromaticity central position in the pixel after the redistribution.
  • the sense of resolution when viewed by humans is not impaired, and a change in chromaticity is not recognized.
  • chromaticity is also redistributed to humans. It looks the same before and after.
  • the center of luminance is not at the center of the divided pixel, the center of luminance is often the center of the divided pixel by centering on the G pixel having high luminance. I have to.
  • data signals R1, G1, and B1 are input to the divided pixel P1
  • data signals R2, G2, and B2 are input to the divided pixel P2
  • a data signal R3 is input to the divided pixel P3.
  • G3 and B3 are input
  • data signals R4, G4, and B4 are input to the divided pixel P4.
  • the redistribution processing is executed, and the divided pixel P1 becomes the data signal R1 ′ / G1 ′ / B1 ′, the divided pixel P2 becomes the data signal R2 ′ / G2 ′ / B2 ′, and the divided pixel P3 receives the data signal.
  • R3 ′, G3 ′, B3 ′, and the divided pixel P4 becomes the data signal R4 ′, G4 ′, B4 ′.
  • the luminance in each divided pixel is concentrated on the G sub-pixel located at the center of RGB for each divided pixel or on the R sub-pixel and the B sub-pixel.
  • the luminance in the divided pixel P1 is concentrated on the G sub pixel
  • the luminance is concentrated on the R sub pixel and the B sub pixel
  • the luminance is set on the R sub pixel.
  • the luminance is concentrated on the G sub-pixel.
  • the gradation data value input to the sub-pixel and the luminance equivalent value have the relationship shown in FIG.
  • the input gradation data is 8 bits, and the input signal has 0 to 255 gradations.
  • the gradation data values (R, G, B) input to the R, G, B sub-pixels in the four divided pixels are (180, 150, 80), the sub-pixels from the graph of FIG.
  • the luminance equivalent value of the pixel is the following value.
  • the respective luminance values in the respective divided pixels do not change before and after the redistribution processing (the above formulas (9) to (12)), and the chromaticity for each RGB in one pixel.
  • the redistribution circuit 12 is configured such that the luminance represented by one divided pixel after upscaling and the luminance represented by the divided pixels after redistribution become equal to each other, and 1 after the upscaling.
  • To B4) are redistributed to the gradation values (R1 ′ to R4 ′, G1 ′ to G4 ′, B1 ′ to B4 ′).
  • FIG. 6 shows the luminance characteristics obtained by the above processing.
  • a graph indicated by a broken line indicates a luminance characteristic when the redistribution processing is not performed after upscaling
  • a graph indicated by a solid line is the case when the redistribution processing is performed after upscaling.
  • the luminance characteristic is shown.
  • the configuration in which the redistribution processing is performed is closer to the luminance characteristic (graph indicated by the dotted line) when the liquid crystal display panel is viewed from the front direction than the configuration in which the redistribution processing is not performed. It is shown that the characteristics are improved.
  • FIG. 7 is a graph comparing the luminance characteristics (graphs indicated by dotted lines) in the conventional configuration shown in FIG. 9 with the luminance characteristics (graphs indicated by broken lines) in the configuration of the present invention.
  • whitening can be suppressed and the viewing angle characteristics can be improved as compared with the conventional configuration.
  • a redistribution process for improving the viewing angle is performed on the upscaled video signal, thereby obtaining a high-definition image and improving the viewing angle. can do.
  • RGB sub-picture elements
  • the RGB input data values are redistributed so that the viewing angle characteristics are improved.
  • the viewing angle characteristics can be improved without impairing the resolution improvement effect. Can do.
  • the resolution is upscaled in the luminance component, and the color component is not upscaled.
  • the spatial resolution characteristic is different from the luminance characteristic and the color characteristic as shown in FIG. 8, and the color contrast frequency characteristic occurs at a lower spatial frequency than the luminance characteristic (Visual Information Processing Handbook).
  • the luminance characteristic Visual Information Processing Handbook
  • the current digital TV broadcast signal has less than half the color information with respect to the luminance information.
  • R, G, and B output the same luminance in adjacent pixels.
  • R, G, and B do not necessarily have to be the same, and accurate chromaticity may be output as a whole. Even when adjacent pixels have different luminance, the conditions are the same as long as the chromaticity is appropriate at a level that can be visually recognized as chromaticity.
  • the luminance is redistributed in each of the RGB sub-pixels. Further, in the case of display with upscaling four times, the luminance information is quadrupled by the upscaling, but there is no problem visually even if the color information displays one color with four divided pixels. In many cases, it is possible to readjust the luminance of the RGB sub-pixels in the four-divided pixels and redistribute them so that the luminance difference between the divided pixels becomes large.
  • a redistribution process can be performed individually by setting a distribution ratio for each sub-pixel. Since the contribution to luminance differs for each sub-pixel, even if the luminance difference between the divided pixels is a high luminance difference of, for example, 100 cd / m 2 or more, the luminance change before and after redistribution per pixel is suppressed. be able to. Therefore, redistribution processing is possible even for such a high luminance difference.
  • redistribution processing can be performed for each sub-pixel, a configuration in which the redistribution processing function is turned ON / OFF for each sub-pixel can be employed.
  • the liquid crystal drive circuit 13 is shown as one block.
  • the present invention is not limited to this, and the liquid crystal drive circuit 13 may be composed of a plurality of blocks.
  • a plurality of upscale circuits 11 are provided, and a plurality of redistribution circuits 12 and liquid crystal drive circuits 13 are provided corresponding to the plurality of upscale circuits 11, and the divided regions in the liquid crystal display panel 2 are formed by these liquid crystal drive circuits.
  • the entire liquid crystal display panel 2 is driven by a single liquid crystal drive circuit 13 the drive timing of each region can be easily matched, so that there is an advantage of good controllability, while the number of input / output pins increases.
  • the circuit size (IC size) becomes large.
  • each divided area is a 2K1K class, so that the conventional 2K1K class display device is provided. It is economical because the 2K control chip used can be used.) On the other hand, it is necessary to provide an arbitration circuit for maintaining the synchronization of the liquid crystal drive circuits 13.
  • each circuit (each block) constituting the image processing apparatus 10 may be realized by software using a processor such as a CPU. That is, the image processing apparatus 10 includes a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, and a RAM (random access memory) that expands the program.
  • a configuration may be adopted in which a storage device (recording medium) such as a memory for storing the program and various data is provided.
  • an object of the present invention is a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of the image processing apparatus 10 which is software for realizing the functions described above is recorded so as to be readable by a computer. Is supplied to the image processing apparatus 10, and the computer (or CPU or MPU) reads and executes the program code recorded on the recording medium.
  • a program code execution format program, intermediate code program, source program
  • Examples of the recording medium include tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and disks including optical disks such as CD-ROM / MO / MD / DVD / CD-R.
  • Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.
  • the image processing apparatus 10 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network.
  • the communication network is not particularly limited.
  • the Internet intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available.
  • the transmission medium constituting the communication network is not particularly limited.
  • wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc.
  • infrared rays such as IrDA and remote control, Bluetooth (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used.
  • the present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.
  • each circuit (each block) of the image processing apparatus 10 may be realized using software, may be configured by hardware logic, and is a hardware that performs a part of the processing. Hardware and arithmetic means for executing software for performing control of the hardware and remaining processing may be combined.
  • the image processing apparatus of the present invention includes an upscaling processing unit for upscaling the resolution of RGB input image data to n times higher resolution, and displays the upscaled image data on the display unit.
  • an upscaling processing unit for upscaling the resolution of RGB input image data to n times higher resolution, and displays the upscaled image data on the display unit.
  • one pixel before upscaling corresponds to n divided pixels after upscaling, and each divided pixel includes a plurality of subpixels corresponding to RGB.
  • a redistribution processing unit for redistributing gradation values assigned to a plurality of sub-pixels corresponding to the pixels, which are upscaled by the upscaling processing unit, with respect to the input image data corresponding to the pixels; And the redistribution processing unit assigns each sub-pixel to each sub-pixel when the n sub-pixels after the upscaling are regarded as one pixel.
  • the gradation value is redistributed among the sub-pixels in the divided pixel, and the gradation value assigned to each sub-pixel is redistributed among the sub-pixels in the pixel for each RGB. It is characterized by doing.
  • the gradation values assigned to the sub-pixels corresponding to RGB that have been upscaled are redistributed among the sub-pixels in the divided pixels, and re-distributed between the sub-pixels in the pixel for each RGB.
  • Distribute. Therefore, for example, before and after redistribution, the luminance of one divided pixel and the chromaticity of one entire pixel do not change, and each subpixel of each RGB of one whole pixel (in one pixel)
  • the luminance difference can be increased between sub-pixels of the same color. Thereby, the viewing angle can be improved while obtaining a high-definition image by the upscaling process.
  • the viewing angle can be improved by distributing the gradation value among the sub-pixels, there is no need to newly divide the pixel to improve the viewing angle, and the panel transmittance is reduced and writing to the pixel is performed. There is no shortage of time.
  • the redistribution processing unit is configured such that, in each pixel, a luminance difference between subpixels of the same color after redistribution by the redistribution processing unit is the same color after upscaling by the upscaling processing unit.
  • the redistribution may be performed so as to be larger than the luminance difference between the sub-pixels.
  • the number of pixels (sub-pixels) increases due to upscaling, and the luminance difference between the sub-pixels increases, so that the viewing angle can be improved.
  • the redistribution processing unit has the same luminance in one divided pixel after the upscaling by the upscaling processing unit and the luminance in the divided pixel after the redistribution by the redistribution processing unit.
  • the gradation value assigned to each sub-pixel is redistributed among the sub-pixels in the divided pixel, and the color in one pixel after the up-scale by the up-scale processing unit
  • the gradation value assigned to each sub-pixel is determined for each RGB so that the degree and the chromaticity in the pixel after redistribution by the redistribution processing unit are equal to each other.
  • a configuration in which redistribution is performed between sub-pixels may be employed.
  • the luminance difference between the sub-pixels in the divided pixel can be increased without changing the luminance of the entire divided pixel and the chromaticity of the entire pixel before and after redistribution. it can. Therefore, the viewing angle can be improved without causing deterioration in display quality.
  • the redistribution processing unit is configured so that each of the divided pixels has a center of luminance at one divided pixel after redistribution by the redistribution processing unit.
  • the gradation value assigned to the sub-pixel is redistributed among the sub-pixels in the divided pixel, and the center of chromaticity in one pixel after redistribution by the redistribution processing unit is set to the center of the pixel.
  • the gradation value assigned to each sub-pixel may be redistributed among the sub-pixels in the pixel for each RGB.
  • the display device of the present invention includes the image processing device and a display unit that displays image data upscaled by the image processing device.
  • the image processing method of the present invention includes an upscaling step for upscaling the resolution of RGB input image data to n times higher resolution, and displays the upscaled image data on the display unit.
  • one pixel before upscaling corresponds to n divided pixels after upscaling, and each divided pixel includes a plurality of subpixels corresponding to RGB, and one pixel Re-distribution processing step of re-distributing the gradation values assigned to a plurality of sub-pixels corresponding to the pixel by up-scaling the input image data corresponding to the pixel,
  • the distribution processing step when the n divided pixels after the upscaling are regarded as one pixel, the gradation value assigned to each sub pixel is redistributed among the sub pixels in the divided pixel in each divided pixel.
  • the gradation value assigned to each sub pixel is redistributed
  • the image processing method it is possible to obtain the effect produced by the image processing apparatus. That is, a high-definition image can be generated and the viewing angle can be improved without complicating the driving process.
  • the redistribution processing step is represented by the luminance represented by one divided pixel after upscaling by the upscaling processing step and the divided pixel after redistribution by the redistribution processing step.
  • the gradation value assigned to each sub-pixel is redistributed among the sub-pixels so that the luminance is equal to each other, and one after the up-scaling in the up-scaling processing step is performed.
  • the gradation value assigned to each sub-pixel in the pixel so that the chromaticity represented by the pixel and the chromaticity represented by the pixel after redistribution in the redistribution processing step are equal to each other Can be redistributed among the sub-pixels for each RGB.
  • the luminance difference between the RGB sub-pixels of the entire pixel without changing the luminance of the entire divided pixel and the chromaticity of the entire pixel before and after redistribution. Can be increased. Therefore, the viewing angle can be improved without causing deterioration in display quality.
  • the image processing apparatus may be realized by a computer.
  • Possible recording media are also included in the scope of the present invention.
  • the present invention can be applied to an image processing apparatus and an image processing method that upscale the resolution of input image data to a high resolution.
  • Display device 2 Liquid crystal display panel (display unit) 10 Image Processing Device 11 Upscale Circuit (Upscale Processing Unit) 12 Redistribution circuit (Redistribution processing unit) 13 Liquid crystal drive circuit 21 Pixel 22 (before up-scaling) Pixel P1, P2, P3, P4 (after up-scaling) Divided pixels R1, R2, R3, R4 Sub-pixel (R-sub-pixel) G1, G2, RG, G4 Subpixel (G subpixel) B1, B2, B3, B4 Subpixel (B subpixel)

Abstract

L'invention concerne un appareil de traitement d'images dans lequel la résolution des données d'images d'entrée R, G et B est interpolée pour passer à une résolution quatre fois supérieure en vue d'un affichage sur un panneau d'affichage à cristaux liquides (2). Un pixel (21) avant l'interpolation correspond à quatre pixels divisés (P1-P4) après l'interpolation, et chacun des pixels divisés (P1-P4) consiste en une pluralité de sous-pixels (R1, G1, B1 ; R2, G2, B2 ; R3, G3, B3 ; R4, G4, B4) correspondant à R, G et B. Dans un pixel divisé (P1), les valeurs de niveaux de gris des sous-pixels (R1, G1, B1) sont redistribuées entre les sous-pixels (R1, G1, B1) dans le pixel divisé (P1), tandis que dans le pixel (22), pour chacune des couleurs R, G et B, les valeurs de niveaux de gris sont redistribuées entre les sous-pixels (R1-R4, G1-G4, B1-B4) dans le pixel (22). Ainsi, dans l'appareil de traitement d'images, pour convertir la résolution des données d'images d'entrée à une haute résolution, des images à haute définition peuvent être produites sans compliquer le processus d'attaque, tandis que l'angle de vue peut être amélioré.
PCT/JP2009/006859 2009-04-10 2009-12-14 Appareil de traitement d'images, appareil d'affichage, procédé de traitement d'images, programme et support d'enregistrement WO2010116432A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-096151 2009-04-10
JP2009096151 2009-04-10

Publications (1)

Publication Number Publication Date
WO2010116432A1 true WO2010116432A1 (fr) 2010-10-14

Family

ID=42935744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/006859 WO2010116432A1 (fr) 2009-04-10 2009-12-14 Appareil de traitement d'images, appareil d'affichage, procédé de traitement d'images, programme et support d'enregistrement

Country Status (1)

Country Link
WO (1) WO2010116432A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07121144A (ja) * 1993-10-20 1995-05-12 Nec Corp 液晶表示装置
JP2004085608A (ja) * 2002-08-22 2004-03-18 Seiko Epson Corp 画像表示装置、画像表示方法及び画像表示プログラム
JP2004302270A (ja) * 2003-03-31 2004-10-28 Fujitsu Display Technologies Corp 画像処理方法及びそれを用いた液晶表示装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07121144A (ja) * 1993-10-20 1995-05-12 Nec Corp 液晶表示装置
JP2004085608A (ja) * 2002-08-22 2004-03-18 Seiko Epson Corp 画像表示装置、画像表示方法及び画像表示プログラム
JP2004302270A (ja) * 2003-03-31 2004-10-28 Fujitsu Display Technologies Corp 画像処理方法及びそれを用いた液晶表示装置

Similar Documents

Publication Publication Date Title
US11037523B2 (en) Display method of display panel that uses different display algorithms for different display areas, display panel and display device
US9412316B2 (en) Method, device and system of displaying a more-than-three primary color image
US8803862B2 (en) Gamma resistor sharing for VCOM generation
US9928786B2 (en) Display device and signal converting device
US6911784B2 (en) Display apparatus
JP4980508B2 (ja) 液晶表示装置、モノクローム液晶表示装置、コントローラ、および画像変換方法
WO2010016319A1 (fr) Dispositif de traitement d'image, dispositif d'affichage, procédé de traitement d'image, programme et support d'enregistrement
US20190228703A1 (en) Distributive-driving of display panel
KR20140104624A (ko) 표시장치, 데이터 처리장치 및 그 방법
JPWO2011102343A1 (ja) 表示装置
JP2007041595A (ja) 映像信号処理装置、それを搭載する液晶表示装置、及びその駆動方法
JP2009192887A (ja) 表示装置
JP2008197228A (ja) 表示装置
WO2011102321A1 (fr) Dispositif d'affichage à cristaux liquides, procédé d'affichage, programme et support d'enregistrement
WO2011125899A1 (fr) Dispositif d'affichage à cristaux liquides, procédé d'affichage, programme et support d'enregistrement
JP2005107491A (ja) 液晶表示装置及びその駆動方法
EP3012830B1 (fr) Unité et procédé de conversion ascendante d'images
WO2012067038A1 (fr) Dispositif d'affichage à couleurs multi-primaires
US9697780B2 (en) LCD device with image dithering function and related method of image dithering
JP2002287687A (ja) 表示方法
JP2009186800A (ja) 表示装置および表示装置のフリッカ判定方法。
US7184608B2 (en) Apparatus and method for edge enhancement of digital image data and digital display device including edge enhancer
TW202201381A (zh) 可應用於在顯示模組中進行亮度增強的設備
US20090135310A1 (en) Display apparatus and control method thereof
CN116631350A (zh) 显示器色偏优化方法、显示器驱动方法及显示器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09842942

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09842942

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP