WO2012067037A1 - Dispositif d'affichage à couleurs multi-primaires - Google Patents

Dispositif d'affichage à couleurs multi-primaires Download PDF

Info

Publication number
WO2012067037A1
WO2012067037A1 PCT/JP2011/076067 JP2011076067W WO2012067037A1 WO 2012067037 A1 WO2012067037 A1 WO 2012067037A1 JP 2011076067 W JP2011076067 W JP 2011076067W WO 2012067037 A1 WO2012067037 A1 WO 2012067037A1
Authority
WO
WIPO (PCT)
Prior art keywords
pixels
pixel
sub
virtual
primary color
Prior art date
Application number
PCT/JP2011/076067
Other languages
English (en)
Japanese (ja)
Inventor
慎司 中川
古川　浩之
吉山　和良
尚子 近藤
吉田　育弘
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 WO2012067037A1 publication Critical patent/WO2012067037A1/fr

Links

Images

Classifications

    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation

Definitions

  • the present invention relates to a multi-primary color display device that performs display using four or more primary colors.
  • one pixel is constituted by three sub-pixels that display red, green, and blue, which are the three primary colors of light, thereby enabling color display.
  • the conventional display device has a problem that a displayable color range (referred to as a “color reproduction range”) is narrow.
  • a displayable color range referred to as a “color reproduction range”
  • it is impossible to display a part of the object color the colors of various objects existing in nature; see Non-Patent Document 1). Therefore, in order to widen the color reproduction range of the display device, a method of increasing the number of primary colors used for display has been proposed.
  • Patent Document 1 discloses a display device that performs display using six primary colors.
  • Patent Document 1 also discloses a display device that performs display using four primary colors and a display device that performs display using five primary colors.
  • An example of a display device that performs display using the six primary colors is shown in FIG.
  • one pixel P is configured by the red sub-pixel R, the green sub-pixel G, the blue sub-pixel B, the cyan sub-pixel C, the magenta sub-pixel M, and the yellow sub-pixel Ye.
  • color display is performed by mixing the six primary colors red, green, blue, cyan, magenta, and yellow displayed by the six sub-pixels.
  • a display device that performs display using four or more primary colors is referred to as a “multi-primary color display device”, and a display device that performs display using three primary colors (that is, a conventional general) is referred to as “three primary colors”. It is referred to as a “display device”.
  • the present invention has been made in view of the above problems, and an object of the present invention is to display multi-primary colors capable of displaying an image with the same or higher resolution without reducing the sub-pixel size as compared with the three primary color display device. To provide an apparatus.
  • the multi-primary color display device has a plurality of pixels arranged in a matrix including a plurality of rows and a plurality of columns, and each of the plurality of pixels displays at least four different colors.
  • Each of the virtual pixels can be displayed as a minimum color display unit, and the two or more sub-pixels constituting each of the plurality of virtual pixels include a sub-pixel common to other virtual pixels.
  • the plurality of virtual pixels are two virtual pixels, and the luminance difference ⁇ Y S and chromaticity difference ⁇ u′v ′ between the tristimulus values at the maximum output of the two virtual pixels are ⁇ Y S ⁇ 5% and ⁇ The relationship u′v ′ ⁇ 0.100 is satisfied.
  • the luminance difference ⁇ Y S and the chromaticity difference ⁇ u′v ′ satisfy a relationship of ⁇ Y S ⁇ 3% and ⁇ u′v ′ ⁇ 0.050.
  • the multi-primary color display device has a plurality of pixels arranged in a matrix including a plurality of rows and a plurality of columns, and each of the plurality of pixels displays at least four different colors.
  • a multi-primary color display device comprising a plurality of sub-pixels including sub-pixels, wherein the plurality of sub-pixels constituting each pixel are distributed to a plurality of virtual pixels each comprising two or more sub-pixels;
  • Each of the plurality of virtual pixels can be displayed as a minimum color display unit, and the two or more sub-pixels constituting each of the plurality of virtual pixels are sub-pixels common to other virtual pixels.
  • the plurality of virtual pixels are three virtual pixels, and the luminance difference ⁇ Y between the tristimulus values at the maximum output of any two virtual pixels of the three virtual pixels S and chromaticity difference ⁇ u′v ′ satisfy the relationship of ⁇ Y S ⁇ 10% and ⁇ u′v ′ ⁇ 0.300.
  • the luminance difference ⁇ Y S and the chromaticity difference ⁇ u′v ′ satisfy a relationship of ⁇ Y S ⁇ 5% and ⁇ u′v ′ ⁇ 0.200.
  • each of the plurality of virtual pixels includes a part of the plurality of subpixels.
  • the plurality of sub-pixels are arranged in one row and multiple columns or in a plurality of rows and one column.
  • the luminance distribution along the arrangement direction of the plurality of sub-pixels at the maximum output of each of the plurality of virtual pixels has only one convex portion and a flat portion having zero luminance.
  • the plurality of rows are substantially parallel to the horizontal direction of the display surface, and the plurality of sub-pixels are arranged in one row and multiple columns within each of the plurality of pixels.
  • the multi-primary color display device includes a multi-primary color display panel having the plurality of sub-pixels in each of the plurality of pixels and four or more input image signals corresponding to the three primary colors. And a signal conversion circuit for converting into a multi-primary color image signal corresponding to the primary colors.
  • the signal conversion circuit generates a low-frequency multi-primary color signal that generates a low-frequency multi-primary color signal, which is a signal in which low-frequency components of the input image signal are multi-primary based on the input image signal.
  • a high-frequency luminance signal generation unit that generates a high-frequency luminance signal that is a luminance-converted signal of the high-frequency component of the input image signal based on the input image signal, and the low-frequency multi-primary color signal generation unit.
  • a rendering processing unit that performs rendering processing on the plurality of virtual pixels based on the low-frequency multi-primary color signal and the high-frequency luminance signal generated by the high-frequency luminance signal generation unit.
  • the low-frequency multi-primary color signal generation unit includes a low-frequency component extraction unit that extracts a low-frequency component from the input image signal, and a low-frequency component of the input image signal extracted by the low-frequency component extraction unit.
  • a multi-primary color conversion unit for converting the components into multi-primary colors.
  • the high frequency luminance signal generation unit generates a luminance signal by performing luminance conversion on the input image signal, and a high frequency component of the luminance signal generated by the luminance conversion unit is high.
  • a high-frequency component extraction unit that extracts the high-frequency component as a luminance signal.
  • the rendering processing unit includes a storage unit that stores a weighting factor that defines a distribution pattern of the plurality of sub-pixels to the plurality of virtual pixels.
  • the plurality of sub-pixels include a red sub-pixel that displays red, a green sub-pixel that displays green, and a blue sub-pixel that displays blue.
  • the plurality of subpixels further include at least one of a cyan subpixel that displays cyan, a magenta subpixel that displays magenta, and a yellow subpixel that displays yellow.
  • the plurality of sub-pixels include a further red sub-pixel that displays red.
  • the multi-primary color display device according to the present invention is a liquid crystal display device.
  • the present invention it is possible to provide a multi-primary color display device capable of displaying an image with the same or higher resolution without reducing the sub-pixel size as compared with the three primary color display device.
  • FIG. 1 is a block diagram schematically showing a liquid crystal display device (multi-primary color display device) 100 according to a preferred embodiment of the present invention.
  • 3 is a diagram illustrating an example of sub-pixel arrangement of a multi-primary color display panel 10 included in the liquid crystal display device 100.
  • 3 is a diagram illustrating an example of sub-pixel arrangement of a multi-primary color display panel 10 included in the liquid crystal display device 100.
  • FIG. 3 is a diagram illustrating an example of sub-pixel arrangement of a multi-primary color display panel 10 included in the liquid crystal display device 100.
  • FIG. It is a figure which shows the example of the allocation pattern of the some sub pixel to a some virtual pixel.
  • FIG. 3 is a block diagram illustrating an example of a specific configuration of a signal conversion circuit 20 included in the liquid crystal display device 100.
  • FIG. 3 is a block diagram illustrating an example of a specific configuration of a signal conversion circuit 20 included in the liquid crystal display device 100.
  • a table showing pixel values and rendering results when the weight W (1, m) of the m-th primary color in the first virtual pixel and the weight W (2, m) of the m-th primary color in the second virtual pixel are set to certain values. is there.
  • (A), (b) and (c) schematically show a part of a certain pixel row represented by the rendering result shown in FIG. 22 on the input side, input side (but after multi-primary color conversion) and output side.
  • the low-frequency component, the high-frequency component, the pixel value, the weight of each primary color in the first virtual pixel, the weight of each primary color in the second virtual pixel, the weight of each primary color in the third virtual pixel, and the virtual It is a table
  • the weight W (1, m) of the mth primary color in the first virtual pixel, the weight W (2, m) of the mth primary color in the second virtual pixel, and the weight W (3, m) of the mth primary color in the third virtual pixel It is a table
  • FIG. 25 It is a figure which shows the example of the reduced display using a rendering process. It is a figure which shows the example of the reduced display using a rendering process. It is a figure which shows typically the relationship between the luminance distribution of Example 1, and 1st virtual pixel VP1 and 2nd virtual pixel VP2. It is a figure which shows typically the relationship between the luminance distribution of Example 2, and 1st virtual pixel VP1, 2nd virtual pixel VP2, and 3rd virtual pixel VP3.
  • liquid crystal display device is illustrated below, this invention is not limited to a liquid crystal display device, It uses suitably also for other display devices, such as an organic electroluminescent display device.
  • FIG. 1 shows a liquid crystal display device 100 according to this embodiment.
  • the liquid crystal display device 100 includes a multi-primary color display panel 10 and a signal conversion circuit 20, and is a multi-primary color display device that performs display using four or more primary colors.
  • the multi-primary color display panel 10 has a plurality of pixels arranged in a matrix including a plurality of rows and a plurality of columns.
  • Each of the plurality of pixels includes a plurality of sub-pixels including at least four sub-pixels displaying different colors.
  • FIG. 2 shows an example of a specific pixel structure (sub-pixel arrangement) of the multi-primary color display panel 10.
  • each of the plurality of pixels P arranged in a matrix is composed of six sub-pixels SP1 to SP6.
  • the six subpixels SP1 to SP6 are arranged in one row and six columns.
  • the six subpixels SP1 to SP6 display, for example, a red subpixel R that displays red, a green subpixel G that displays green, a blue subpixel B that displays blue, a cyan subpixel C that displays cyan, and magenta.
  • a magenta sub-pixel M and a yellow sub-pixel Ye displaying yellow.
  • the pixel structure of the multi-primary color display panel 10 is not limited to the example shown in FIG. 3 and 4 show other examples of the pixel structure of the multi-primary color display panel 10.
  • each of the plurality of pixels P arranged in a matrix is composed of five sub-pixels SP1 to SP5.
  • the five subpixels SP1 to SP5 are arranged in one row and five columns.
  • the five subpixels SP1 to SP5 are, for example, a red subpixel R, a green subpixel G, and a blue subpixel B, and any two of a cyan subpixel C, a magenta subpixel M, and a yellow subpixel Ye.
  • each of the plurality of pixels P arranged in a matrix is composed of four sub-pixels SP1 to SP4.
  • the four subpixels SP1 to SP4 are arranged in one row and four columns.
  • the four subpixels SP1 to SP4 are, for example, a red subpixel R, a green subpixel G, and a blue subpixel B, and any one of a cyan subpixel C, a magenta subpixel M, and a yellow subpixel Ye.
  • the plurality of sub-pixels constituting each pixel P do not necessarily include only sub-pixels that display different colors.
  • a further red pixel R that displays red may be provided instead of any of the cyan sub-pixel C, the magenta sub-pixel M, and the yellow sub-pixel Ye.
  • a white pixel W that displays white may be provided instead of any of the cyan sub-pixel C, the magenta sub-pixel M, and the yellow sub-pixel Ye.
  • the white pixel W is provided, the display luminance of the entire pixel P can be improved.
  • each pixel P a plurality of subpixels may be arranged in a plurality of rows and one column, or may be arranged in a plurality of rows and a plurality of columns.
  • a plurality of sub-pixels exist in each pixel P along that direction.
  • a plurality of sub-pixels are arranged in two or more columns in each pixel P.
  • a plurality of sub-pixels are preferably arranged in two or more rows in each pixel P.
  • the row direction that is, a plurality of pixels P is used).
  • the plurality of configured lines is substantially parallel to the horizontal direction of the display surface.
  • a plurality of sub-pixels are arranged in one row and a plurality of columns in each pixel P for general use.
  • pixel rows are substantially parallel to the horizontal direction of the display surface and a plurality of sub-pixels are arranged in one row and multiple columns in each pixel P will be described as an example unless otherwise specified.
  • the signal conversion circuit 20 refers to an input image signal (three primary color image signals) corresponding to three primary colors (RGB) as an image signal corresponding to four or more primary colors (“multi-primary color image signal”). .).
  • the multi-primary color image signal output from the signal conversion circuit 20 is input to the multi-primary color display panel 10, and color display using four or more primary colors is performed.
  • a specific configuration of the signal conversion circuit 20 will be described in detail later.
  • the total number of the plurality of pixels P included in the multi-primary color display panel 10 is referred to as “panel resolution”.
  • the panel resolution when a plurality of pixels P are arranged in the row direction and n in the column direction is expressed as “m ⁇ n”.
  • the minimum display unit of the input image is also referred to as “pixel” for the sake of convenience, and the total number of pixels of the input image is referred to as “resolution of the input image”.
  • the resolution of an input image composed of m pixels in the row direction and n pixels in the column direction is expressed as “m ⁇ n”.
  • a plurality of sub-pixels constituting each pixel P are distributed to a plurality of virtual pixels (hereinafter referred to as “virtual pixels”), and each of the plurality of virtual pixels is minimized.
  • virtual pixels a plurality of virtual pixels
  • FIG. 5, FIG. 6 and FIG. 7 show examples of a distribution pattern of a plurality of sub-pixels to a plurality of virtual pixels.
  • the six subpixels SP1 to SP6 constituting each pixel P are distributed to two virtual pixels VP1 and VP2.
  • One of the two virtual pixels VP1 and VP2 (on the left side in the drawing) is composed of four subpixels SP1, SP2, SP3 and SP4 of the six subpixels SP1 to SP6.
  • the other (right side in the figure) virtual pixel VP2 is composed of three sub-pixels SP4, SP5 and SP6.
  • the sub-pixel SP4 located fourth from the left in the pixel P constitutes both two virtual pixels VP1 and VP2. That is, the two virtual pixels VP1 and VP2 include a common subpixel SP4 and share the subpixel SP4.
  • the five subpixels SP1 to SP5 constituting each pixel P are distributed to two virtual pixels VP1 and VP2.
  • One of the two virtual pixels VP1 and VP2 (on the left side in the drawing) is composed of three subpixels SP1, SP2 and SP3 among the five subpixels SP1 to SP5.
  • the other virtual pixel VP2 (on the right side in the figure) includes three subpixels SP3, SP4, and SP5.
  • the sub-pixel SP3 located in the center in the pixel P constitutes both of the two virtual pixels VP1 and VP2. That is, the two virtual pixels VP1 and VP2 include a common subpixel SP3 and share the subpixel SP3.
  • the four subpixels SP1 to SP4 constituting each pixel P are distributed to two virtual pixels VP1 and VP2.
  • One of the two virtual pixels VP1 and VP2 (on the left side in the drawing) is composed of three subpixels SP1, SP2 and SP3 among the four subpixels SP1 to SP4.
  • the other virtual pixel VP2 (on the right side in the figure) is composed of two subpixels SP3 and SP4.
  • the sub-pixel SP3 located third from the left in the pixel P constitutes both two virtual pixels VP1 and VP2. That is, the two virtual pixels VP1 and VP2 include a common subpixel SP3 and share the subpixel SP3.
  • the six subpixels SP1 to SP6 constituting each pixel P are distributed to three virtual pixels VP1, VP2, and VP3.
  • One of the three virtual pixels VP1, VP2, and VP3 (on the left side in the figure) is composed of three sub-pixels SP1, SP2, and SP3 among the six sub-pixels SP1 to SP6.
  • the other virtual pixel VP2 (in the center in the figure) includes three subpixels SP3, SP4, and SP5.
  • another one virtual pixel VP3 is constituted by two subpixels SP5 and SP6.
  • the sub-pixel SP3 located third from the left in the pixel P constitutes both of the two virtual pixels VP1 and VP2. That is, the two virtual pixels VP1 and VP2 include a common subpixel SP3 and share the subpixel SP3. Further, the sub-pixel SP5 located fifth from the left side in the pixel P constitutes both the two virtual pixels VP2 and VP3. That is, the two virtual pixels VP2 and VP3 include a common subpixel SP5 and share the subpixel SP5.
  • the five subpixels SP1 to SP5 constituting each pixel P are distributed to three virtual pixels VP1, VP2, and VP3.
  • One of the three virtual pixels VP1, VP2, and VP3 (on the left side in the drawing) is composed of two sub-pixels SP1 and SP2 among the five sub-pixels SP1 to SP5.
  • the other virtual pixel VP2 (in the center in the figure) includes three subpixels SP2, SP3, and SP4.
  • another other virtual pixel VP3 (on the right side in the figure) is constituted by two subpixels SP4 and SP5.
  • the sub-pixel SP2 located second from the left side in the pixel P constitutes both two virtual pixels VP1 and VP2.
  • the two virtual pixels VP1 and VP2 include a common sub-pixel SP2, and share the sub-pixel SP2.
  • the sub-pixel SP4 located fourth from the left in the pixel P constitutes both the two virtual pixels VP2 and VP3. That is, the two virtual pixels VP2 and VP3 include a common subpixel SP4 and share the subpixel SP4.
  • each pixel P can be distributed to a plurality of virtual pixels, and each virtual pixel can be displayed as a minimum color display unit.
  • the display resolution resolution of the image displayed on the display surface
  • the panel resolution physical resolution unique to the panel defined by the total number of pixels P. Therefore, even when the resolution of the input image is higher than the panel resolution, it is possible to display appropriately.
  • the input image can be reduced and displayed on a part of the display surface.
  • the liquid crystal display device (multi-primary color display device) 100 can make the display resolution higher than the panel resolution, so that the same sub-pixel size and screen size as those of the three primary color display device can be used. An image with a higher resolution can be displayed and can be produced at the same cost as the three primary color display device.
  • the sub-pixels constituting each virtual pixel include sub-pixels common to other virtual pixels (that is, each virtual pixel is different from the sub-pixel displaying the same primary color). Assigned in common with the virtual pixel).
  • the number and types of sub-pixels constituting each virtual pixel increases, so that it is easy to ensure sufficient luminance in each virtual pixel, and a desired color ( For example, white) can be easily reproduced.
  • the liquid crystal display device 100 is configured such that the color difference between the tristimulus values at the maximum output of any two virtual pixels of the plurality of virtual pixels is smaller than a predetermined threshold value ⁇ E th.
  • a predetermined threshold value ⁇ E th has been.
  • flicker and artifacts may occur and image quality may deteriorate.
  • image quality may deteriorate.
  • flicker and artifacts can be suppressed.
  • a specific value of the predetermined threshold ⁇ E th will be described in detail later.
  • the liquid crystal display device 100 can change the distribution pattern of a plurality of subpixels to a plurality of virtual pixels. Since the distribution pattern is variable, the degree of improvement in display resolution can be adjusted. For example, according to the distribution patterns shown in FIGS. 5, 6, and 7, two virtual pixels VP ⁇ b> 1 and VP ⁇ b> 2 that are adjacent to each other in the row direction (horizontal direction) are configured for each pixel P. Can be doubled. Therefore, an input image having a resolution of “2m ⁇ n” can be displayed on the multi-primary color display panel 10 having a panel resolution of “m ⁇ n”. Further, according to the distribution patterns shown in FIGS.
  • the display resolution is set in the horizontal direction. Can be tripled. Therefore, an input image having a resolution of “3 m ⁇ n” can be displayed on the multi-primary color display panel 10 having a panel resolution of “m ⁇ n”.
  • changing the distribution pattern” of the sub-pixels does not only mean changing the number of virtual pixels per pixel P.
  • the liquid crystal display device 100 may switch between the distribution pattern illustrated in FIG. 5 and the distribution pattern illustrated in FIG. 10.
  • the six subpixels SP1 to SP6 constituting each pixel P are distributed to two virtual pixels VP1 and VP2.
  • One of the two virtual pixels VP1 and VP2 (on the left side in the drawing) is composed of three subpixels SP1, SP2 and SP3 of the six subpixels SP1 to SP6.
  • the other virtual pixel VP2 (on the right side in the figure) is composed of four subpixels SP3, SP4, SP5 and SP6.
  • “changing the distribution pattern” of sub-pixels also means changing the number and combination of sub-pixels constituting the virtual pixel.
  • a set of virtual pixels with a small luminance difference, a set of virtual pixels with a small chromaticity difference, and the like can be selected as appropriate according to the type of input image, the display purpose, and the like.
  • the number of sub-pixels included in common in the two virtual pixels is one, but the number of sub-pixels included in common is not limited to one. . 11, 12, and 13 show other examples of the distribution pattern.
  • one of the two virtual pixels VP1 and VP2 (on the left side in the drawing) is the four subpixels SP1, SP2, SP3 of the six subpixels SP1 to SP6. And SP4.
  • the other virtual pixel VP2 (on the right side in the figure) is composed of four subpixels SP3, SP4, SP5 and SP6.
  • the subpixels SP3 and SP4 located third and fourth from the left in the pixel P constitute both the two virtual pixels VP1 and VP2. That is, the two virtual pixels VP1 and VP2 include two common subpixels SP3 and SP4, and share the subpixels SP3 and SP4.
  • one of the two virtual pixels VP1 and VP2 (on the left side in the figure) is the four subpixels SP1, SP2, SP3 of the five subpixels SP1 to SP5. And SP4.
  • the other virtual pixel VP2 (on the right side in the figure) includes three subpixels SP3, SP4, and SP5.
  • the subpixels SP3 and SP4 located third and fourth from the left in the pixel P constitute both the two virtual pixels VP1 and VP2. That is, the two virtual pixels VP1 and VP2 include two common subpixels SP3 and SP4, and share the subpixels SP3 and SP4.
  • one of the two virtual pixels VP1 and VP2 (on the left side in the drawing) is the three subpixels SP1, SP2 and SP3 of the four subpixels SP1 to SP4. Consists of.
  • the other virtual pixel VP2 (on the right side in the figure) is composed of three subpixels SP2, SP3 and SP4.
  • the subpixels SP2 and SP3 positioned second and third from the left in the pixel P constitute both the two virtual pixels VP1 and VP2. That is, the two virtual pixels VP1 and VP2 include two common subpixels SP2 and SP3, and share the subpixels SP2 and SP3.
  • virtual pixels may include two or more common sub-pixels.
  • each of the plurality of virtual pixels is configured by two or more sub-pixels that are continuous in one pixel P.
  • the present invention provides such a distribution pattern. It is not limited to patterns.
  • the plurality of subpixels SP1 to SP6 are distributed to two virtual pixels VP1 and VP2.
  • the plurality of sub-pixels SP1 to SP6 are distributed to three virtual pixels VP1, VP2, and VP3.
  • the left virtual pixel VP1 of the two virtual pixels VP1 and VP2 shown in FIG. 14 is one subpixel SP6 of the left pixel P and three subpixels SP1, SP2 and SP3 of the right pixel P. It is comprised by.
  • the right virtual pixel VP2 is composed of three sub-pixels SP3, SP4 and SP5 of the right pixel P.
  • the left virtual pixel VP1 includes one subpixel SP6 of the left pixel P and two subpixels SP1 and SP2 of the right pixel P. It is comprised by.
  • the central virtual pixel VP2 is composed of three subpixels SP2, SP3 and SP4 of the right pixel P, and the right virtual pixel VP3 is composed of two subpixels SP4 and SP5 of the right pixel P. Is done.
  • the left virtual pixel VP1 is composed of a plurality of sub-pixels extending across the two pixels P. Thus, some virtual pixels may straddle the two pixels P.
  • FIG. 16, FIG. 17 and FIG. 18 show other examples of distribution patterns in which some virtual pixels extend over two pixels P.
  • the plurality of sub-pixels SP1 to SP4 are distributed to two virtual pixels VP1 and VP2.
  • the plurality of sub-pixels SP1 to SP6 are distributed to two virtual pixels VP1 and VP2.
  • the plurality of subpixels SP1 to SP6 are distributed to three virtual pixels VP1, VP2, and VP3.
  • the left virtual pixel VP1 of the two virtual pixels VP1 and VP2 shown in FIG. 16 includes three sub-pixels SP1, SP2 and SP3 of the central pixel P.
  • the right virtual pixel VP2 includes two subpixels SP3 and SP4 of the center pixel P and one subpixel SP1 of the right pixel P.
  • the left virtual pixel VP1 of the two virtual pixels VP1 and VP2 shown in FIG. 17 is composed of four sub-pixels SP1, SP2, SP3 and SP4 of the central pixel P.
  • the right virtual pixel VP2 includes three subpixels SP4, SP5, and SP6 of the central pixel P and one subpixel SP1 of the right pixel P.
  • the left virtual pixel VP1 among the three virtual pixels VP1, VP2, and VP3 shown in FIG. 18 is composed of three sub-pixels SP1, SP2, and SP3 of the central pixel P.
  • the central virtual pixel VP2 is composed of three subpixels SP3, SP4 and SP5 of the central pixel P
  • the right virtual pixel VP3 is composed of two subpixels SP5 and SP6 of the central pixel P, and This is composed of one sub-pixel SP1 of the right pixel P.
  • each of the plurality of virtual pixels is preferably composed of a part of the plurality of sub-pixels (that is, not composed of all the sub-pixels).
  • Each of the plurality of virtual pixels is preferably composed of two or more subpixels of the plurality of subpixels (that is, not composed of only one subpixel).
  • FIG. 19 shows an example of a specific configuration of the signal conversion circuit 20.
  • the signal conversion circuit 20 includes a low-frequency multi-primary color signal generation unit 21, a high-frequency luminance signal generation unit 22, and a rendering processing unit 23, as shown in FIG.
  • the signal conversion circuit 20 further includes a ⁇ correction unit 24 and an inverse ⁇ correction unit 25.
  • the input image signal to the signal conversion circuit 20 is first subjected to ⁇ correction processing by the ⁇ correction unit 24.
  • the image signal that has been subjected to the ⁇ correction processing is input to the low-frequency multi-primary color signal generation unit 21 and the high-frequency luminance signal generation unit 22, respectively.
  • the low-frequency multi-primary color signal generation unit 21 generates a low-frequency multi-primary color signal based on the input image signal.
  • the low-frequency multi-primary color signal is a signal in which low-frequency components (components having a relatively low spatial frequency) of the input image signal are converted into multi-primary colors (that is, converted so as to correspond to four or more primary colors). .
  • the low-frequency multi-primary color signal generation unit 21 includes a low-frequency component extraction unit (here, a low-pass filter: LPF) 26 and a multi-primary color conversion unit 27.
  • the low pass filter 26 extracts a low frequency component from the input image signal.
  • the low-frequency component of the input image signal extracted by the low-pass filter 26 is converted into multi-primary colors by the multi-primary color conversion unit 27.
  • the multi-primary low-frequency component is output as a low-frequency multi-primary color signal.
  • various known techniques can be used as a technique for multi-primary color conversion in the multi-primary color conversion unit 27. For example, the technique disclosed in International Publication No. 2008/065935 or International Publication No. 2007/097080 can be used.
  • the high frequency luminance signal generation unit 22 generates a high frequency luminance signal based on the input image signal.
  • the high frequency luminance signal is a signal obtained by luminance conversion of a high frequency component (component having a relatively high spatial frequency) of the input image signal.
  • the high-frequency luminance signal generation unit 22 includes a luminance conversion unit 28 and a high-frequency component extraction unit (here, a high-pass filter: HPF) 29.
  • the luminance conversion unit 28 performs luminance conversion on the input image signal to generate a luminance signal.
  • the high pass filter 29 extracts the high frequency component of the luminance signal generated by the luminance conversion unit 28 as a high frequency luminance signal.
  • the rendering processing unit 23 converts the low-frequency multi-primary color signal generated by the low-frequency multi-primary color signal generation unit 21 and the high-frequency luminance signal generated by the high-frequency luminance signal generation unit 22 to a plurality of virtual pixels. Perform the rendering process.
  • the rendering processing unit 23 includes a storage unit 23a in which a weighting factor that defines a distribution pattern of a plurality of subpixels to a plurality of virtual pixels is stored, and is defined by the weighting factor. Rendering is performed according to the distribution pattern.
  • the storage unit 23a stores a number of weighting factors corresponding to a plurality of distribution patterns, and the rendering processing unit 23 is preferable according to the resolution of the input image and the like.
  • a weighting factor is selected, and a rendering process is performed in accordance with a distribution pattern defined by the selected weighting factor.
  • the image signal generated by the rendering process is subjected to inverse ⁇ correction by the inverse ⁇ correction unit 25 and is output as a multi-primary color image signal.
  • the signal conversion circuit 20 considers human visual characteristics that the sensitivity to the luminance signal is superior to the color signal (that is, the visibility of the color difference is lower than the luminance visibility), Multi-primary color processing is performed on the low-frequency component of the input image signal, and luminance conversion processing is performed on the high-frequency component.
  • An image signal (multi-primary image signal) corresponding to four or more primary colors can be output by combining the low-frequency multi-primary color signal and the high-frequency luminance signal obtained by these processes and rendering to a virtual pixel. it can.
  • the high frequency component is extracted by the high pass filter 29 after the luminance conversion is performed by the luminance conversion unit 28 in the high frequency luminance signal generation unit 22. That is, the high-pass filter 29 is arranged at a stage subsequent to the luminance conversion unit 28.
  • the luminance conversion unit 28 may be arranged downstream of the high pass filter 29. That is, the luminance conversion unit 28 may perform luminance conversion after extracting the high frequency component of the input image signal by the high pass filter 29.
  • the luminance conversion by the luminance conversion unit 28 and the extraction of the high frequency component by the high pass filter 29 are linear operations, there is a difference in the high frequency luminance signal obtained between the configuration shown in FIG. 19 and the configuration shown in FIG. There is no.
  • the computation load when extracting the high frequency component in the case of hardware, the number and area of signal lines, etc.) ) Can be reduced.
  • n is a pixel position in the row direction
  • m is a sub-pixel position in the pixel
  • L (n, m) is a low-frequency component of the m-th primary color at the pixel position n
  • H (n) is the luminance at the pixel position n.
  • P (n, m) is a pixel value calculated from L (n, m) and H (n)
  • W (g, m) is This is a weight (also referred to as a weight coefficient) of the m-th primary color in the g-th virtual pixel.
  • the pixel value P (2n ⁇ 1) of the two pixels on the input side with respect to one pixel on the output side (represented by the rendering result V (n, m)) by two virtual pixels.
  • m) and P (2n, m) or P (2n, m) and P (2n + 1, m) are rendered. That is, it can be seen that information for two pixels on the input side can be displayed by one pixel on the output side.
  • FIG. 22 shows a pixel when the weight W (1, m) of the m-th primary color in the first virtual pixel and the weight W (2, m) of the m-th primary color in the second virtual pixel are set as shown in Table 1 below. Show values and rendering results. 23A, 23B, and 23C show a part of a certain pixel row represented by the rendering result shown in FIG. 22 on the input side, the input side (but after multi-primary color conversion), and the output side. Is shown schematically.
  • the weights (weighting factors) shown in Table 1 are all set to “0”, “1”, or “0.5”.
  • a sub-pixel that displays a primary color whose weight is set to 1 can contribute all the luminance that can be output to the display of the virtual pixel.
  • the sub-pixel displaying the primary color whose weight is set to 0 does not contribute to the display of the virtual pixel at all. That is, it can be said that the sub-pixel displaying the primary color whose weight is set to 0 does not constitute the virtual pixel.
  • a sub-pixel that displays a primary color whose weight is set to 0.5 can contribute half the luminance that can be output to the display of the virtual pixel.
  • the sub-pixels that display the primary colors set so that the weights of the plurality of pixels exceed 0 (but less than 1) contribute to the display of the plurality of virtual pixels, and thus are common to the plurality of virtual pixels. Included (shared by multiple virtual pixels).
  • the weight is set as shown in Table 1
  • the first virtual pixel is composed of four sub-pixels that display the second, third, fourth, and fifth primary colors
  • the second virtual pixel is the first, This is composed of four sub-pixels that display the second, fifth, and sixth primary colors.
  • the size of the sub-pixel on the output side is the same as the size of the sub-pixel on the input side. Therefore, the number of pixels on the output side is 1 ⁇ 2 of the number of pixels on the input side.
  • the size of the sub-pixel on the output side is the size of the sub-pixel on the input side after multi-primary color conversion as shown in FIG. Need to be the same.
  • FIG. 23C by rendering using two virtual pixels, as shown in FIG. 23C, on the output side where the sub-pixel size is the same and the number of pixels is 1 ⁇ 2 compared to the input side, It is possible to display an image with the same resolution as
  • n is a pixel position in the row direction
  • m is a sub-pixel position in the pixel
  • L (n, m) is a low-frequency component of the m-th primary color at the pixel position n.
  • H (n) are high frequency components of luminance at the pixel position n.
  • P (n, m) is a pixel value calculated from L (n, m) and H (n)
  • W (g, m) is This is a weight (weight coefficient) of the m-th primary color in the g-th virtual pixel.
  • the pixel value P (3n ⁇ 2) of the three pixels on the input side with respect to one pixel on the output side (represented by the rendering result V (n, m)) by three virtual pixels.
  • m) and P (3n-1, m) and P (3n, m) or P (3n-1, m) and P (3n, m) and P (3n + 1, m), or P (3n , m) and P (3n + 2, m) are rendered. That is, it can be seen that information for three pixels on the input side can be displayed by one pixel on the output side.
  • FIG. 25 shows the weight W (1, m) of the mth primary color in the first virtual pixel, the weight W (2, m) of the mth primary color in the second virtual pixel, and the weight W (m of the mth primary color in the third virtual pixel.
  • 3, m) shows pixel values and rendering results when set as shown in Table 2 below.
  • 26 (a), (b) and (c) show a part of a certain pixel row represented by the rendering result shown in FIG. 25 on the input side, input side (but after multi-primary color conversion) and output side. Is shown schematically.
  • the first virtual pixel is composed of three sub-pixels that display the first, second, and sixth primary colors.
  • the second virtual pixel is composed of three subpixels that display the second, third, and fourth primary colors, and the third virtual pixel is three subpixels that display the fourth, fifth, and sixth primary colors. Will be configured.
  • the size of the sub-pixel on the output side is the same as the size of the sub-pixel on the input side. Therefore, the number of pixels on the output side is 1 ⁇ 2 of the number of pixels on the input side.
  • the size of the sub-pixel on the output side is the size of the sub-pixel on the input side after multi-primary color conversion as shown in FIG. Need to be smaller than.
  • FIG. 26C by rendering using three virtual pixels, as shown in FIG. 26C, on the output side where the sub-pixel size is the same and the number of pixels is 1 ⁇ 2 compared to the input side, It is possible to display an image with higher resolution.
  • display resolution can be improved by rendering processing in which a plurality of virtual pixels are considered for each pixel P.
  • high-frequency reproducibility and the ease of false color generation that occurs during rendering processing taking virtual pixels into account are in a trade-off relationship, so it is preferable to set an appropriate weight according to the purpose.
  • the displayable resolution can be changed depending on the virtual pixel distribution pattern. it can. Therefore, it is possible to select an appropriate resolution depending on the type (content) of the input image and its display method (full display, reduced display, etc.).
  • 27 and 28 show specific examples of reduced display.
  • the display surface is divided into four regions of 2 rows and 2 columns, and four images IG1 to IG4 each reduced to 1 ⁇ 2 are displayed simultaneously.
  • simultaneous viewing of four screens becomes possible.
  • the image IG2 reduced to 1/3 is displayed so as to overlap a part of the image IG1 displayed on the entire display surface.
  • subsidiary information for example, weather forecast
  • each of the images IG1 to IG4 is reduced to 1/2 in both the horizontal direction and the vertical direction.
  • the image IG2 is reduced to 1/3 both in the horizontal direction and in the vertical direction.
  • Flicker and artifacts are likely to occur when the color stimulus difference (color difference) at the maximum output between virtual pixels is large. Therefore, it is preferable to determine a combination of sub-pixels constituting the virtual pixel, that is, to set an appropriate weight so that the color difference between the virtual pixels becomes small.
  • the color difference is represented by luminance and chromaticity.
  • Table 3 shows the tristimulus values and weights of each primary color in a certain pixel (at the maximum output) of the m primary color display device in which rendering processing is performed using n virtual pixels.
  • the ideal values of the tristimulus values X g , Y g , and Z g at the maximum output of each virtual pixel are expressed by the following formulas: As given by the tristimulus values X w , Y w , Z w divided by the number of virtual pixels n.
  • tristimulus values X i , Y i , and Z i at the maximum output of the i-th virtual pixel are given by the following equations.
  • the ideal condition of the tristimulus value at the maximum output of the i-th virtual pixel is expressed as follows.
  • ⁇ E i, g is the color difference between the tristimulus values (X i , Y i , Z i ) at the maximum output of the i-th virtual pixel and the ideal values (X g , Y g , Z g ).
  • ⁇ E i, j is a tristimulus value (X i , Y i , Z i ) at the maximum output of the i-th virtual pixel and a tristimulus value (X j , Y j , Z j ) of the j-th virtual pixel.
  • the latter color difference ⁇ E i, j is necessarily zero for an arbitrary i, j, so that the occurrence of flicker and artifacts is reliably suppressed. be able to.
  • the color difference ⁇ E i, j for any i, j (that is, the color difference between the tristimulus values at the maximum output of any two virtual pixels of the plurality of virtual pixels) is smaller than a predetermined threshold ⁇ E th By doing so, it is possible to sufficiently suppress the occurrence of flicker and artifacts.
  • the threshold ⁇ E th is defined by a luminance difference ⁇ Y S of 5% and a chromaticity difference ⁇ u′v ′ of 0.100. That is, when a plurality of sub-pixels are distributed to two virtual pixels, the luminance difference ⁇ Y S and chromaticity difference ⁇ u′v ′ between the tristimulus values at the maximum output of the two virtual pixels are ⁇ Y S ⁇ 5% and It is preferable to satisfy the relationship of ⁇ u′v ′ ⁇ 0.100.
  • luminance difference ⁇ Y S (i, j) and chromaticity difference ⁇ u′v ′ (i, j) at the maximum output between the i-th virtual pixel and the j-th virtual pixel are given by the following equations.
  • the threshold ⁇ E th is defined by a luminance difference ⁇ Y S of 3% and a chromaticity difference ⁇ u′v ′ of 0.050 from the viewpoint of sufficiently suppressing the occurrence of flicker and artifacts. More preferably. That is, it is more preferable that the luminance difference ⁇ Y S and chromaticity difference ⁇ u′v ′ satisfy the relationship of ⁇ Y S ⁇ 3% and ⁇ u′v ′ ⁇ 0.050.
  • the threshold ⁇ E th is defined by a luminance difference ⁇ Y S of 10% and a chromaticity difference ⁇ u′v ′ of 0.300. That is, when a plurality of sub-pixels are distributed to three virtual pixels, the luminance difference ⁇ Y S and chromaticity difference ⁇ u′v between the three stimulus values at the maximum output of any two virtual pixels of the three virtual pixels. 'Preferably satisfies the relationship of ⁇ Y S ⁇ 10% and ⁇ u'v' ⁇ 0.300.
  • the threshold ⁇ E th is defined by a luminance difference ⁇ Y S of 5% and a chromaticity difference ⁇ u′v ′ of 0.200 from the viewpoint of sufficiently suppressing the occurrence of flicker and artifacts. More preferably. That is, it is more preferable that the luminance difference ⁇ Y S and the chromaticity difference ⁇ u′v ′ satisfy the relationship of ⁇ Y S ⁇ 5% and ⁇ u′v ′ ⁇ 0.200.
  • the high frequency reproducibility can be evaluated by the luminance distribution (luminance distribution along the arrangement direction of the plurality of sub-pixels) in each virtual pixel.
  • the luminance distribution Y d (i, m) at the maximum output of the i-th virtual pixel is expressed by the following equation.
  • the luminance distribution of the virtual pixel has a plurality of convex portions, or the width of the convex portion of the luminance distribution is extremely different among the virtual pixels, which causes a reduction in high frequency reproducibility.
  • Tables 4 to 8 below show the luminance distribution of Examples 1 to 5.
  • Examples 1 and 3 to 5 are examples in which each pixel P is configured by six sub-pixels, and two virtual pixels (a first virtual pixel and a second virtual pixel) are configured for each pixel P. is there.
  • each pixel P is configured by six sub-pixels, and three virtual pixels (first virtual pixel, second virtual pixel, and third virtual pixel) are configured per pixel P. It is an example.
  • the parentheses indicate the weights (for each sub-pixel) of each primary color in the virtual pixel. Also, the description of the column with zero weight is omitted.
  • FIGS. 29 to 33 schematically show the relationship between the luminance distribution of Examples 1 to 5 and the first virtual pixel VP1, the second virtual pixel VP2, and the third virtual pixel VP3.
  • Example 1 shown in Table 4 and FIG. 29, for both the first virtual pixel VP1 and the second virtual pixel VP2, the luminance distribution along the arrangement direction of the sub-pixels is only one convex portion and the luminance is zero. A certain flat portion. Further, the ratio of the width W 1 of the convex portion in the luminance distribution of the first virtual pixel VP1 to the width W 2 of the convex portion in the luminance distribution of the second virtual pixel VP2 is 4: 3, and these widths W 1. And W 2 are not extremely different. Therefore, it can be said that Example 1 is a preferable example. When evaluating the luminance distribution of the virtual pixels, the evaluation is performed for one pixel width. That is, a sub-pixel that does not constitute a virtual pixel is also considered.
  • Example 2 shown in Table 5 and FIG. 30, the luminance distribution along the arrangement direction of the sub-pixels is only one convex portion for any of the first virtual pixel VP1, the second virtual pixel VP2, and the third virtual pixel VP3. And a flat portion whose luminance is zero. Further, the width W 1 of the convex portion in the luminance distribution of the first virtual pixel VP1, the width W 2 of the convex portion in the luminance distribution of the second virtual pixel VP2, and the width W of the convex portion in the luminance distribution of the third virtual pixel VP3. 3 the ratio of 3: 3: 2, these widths W 1, W 2 and W 3 are not extremely different. Therefore, it can be said that Example 2 is a preferable example.
  • Example 6 shown in Table 6 and FIG. 31, for the first virtual pixel VP1, the luminance distribution along the sub-pixel arrangement direction has two convex portions, and for the second virtual pixel VP2, the sub-pixel arrangement is provided.
  • the luminance distribution along the direction has three convex portions. Therefore, when two virtual pixels are configured for one pixel P, it can be said that Example 1 is preferable to Example 3.
  • Example 7 shown in Table 7 and FIG. 32, the luminance distribution along the arrangement direction of the sub-pixels does not have a flat portion where the luminance is zero for both the first virtual pixel VP1 and the second virtual pixel VP2. Therefore, when two virtual pixels are configured for one pixel P, it can be said that Example 1 is preferable to Example 4.
  • Example 5 the luminance distribution along the arrangement direction of the sub-pixels has only one convex portion for both the first virtual pixel VP1 and the second virtual pixel VP2.
  • the ratio of the width W 1 of the convex portion in the luminance distribution of the first virtual pixel VP1 to the width W 2 of the convex portion in the luminance distribution of the second virtual pixel VP2 is 6: 1.
  • W 2 are extremely different. Therefore, when two virtual pixels are configured for one pixel P, it can be said that Example 1 is preferable to Example 5.
  • the luminance distribution at the maximum output of each of the plurality of virtual pixels has only one convex portion and a flat portion where the luminance is zero. It is preferable.
  • each virtual pixel is composed of a part of sub-pixels among a plurality of sub-pixels (that is, not composed of all sub-pixels) so that a flat portion having a luminance of zero is formed in the luminance distribution.
  • each virtual pixel is composed of two or more sub-pixels of a plurality of sub-pixels (that is, only one sub-pixel) so that the width of the convex portion of the luminance distribution is not extremely different between the virtual pixels. It is preferably not comprised of Further, the difference in the width of the convex portion of the luminance distribution between any two virtual pixels is preferably 25% or less of the width of one pixel P.
  • the difference in the width of the protrusion is equal to or less than one sub-pixel, and also when the pixel P is composed of six sub-pixels.
  • the difference in the widths of the protrusions is preferably less than or equal to one subpixel.
  • the width of the convex portion of the luminance distribution is the same between any two virtual pixels.
  • Conditions for suppressing the occurrence of flicker and artifacts described above conditions for color difference when comparing virtual pixels
  • conditions for realizing sufficiently high high-frequency reproducibility conditions for luminance distribution of virtual pixels It is preferable to set the sub-pixel arrangement and the weight of each primary color so as to satisfy the above as much as possible.
  • each pixel P includes two red sub-pixels R, one green sub-pixel G, one blue sub-pixel B, one cyan sub-pixel C, and one yellow sub-pixel Ye (that is, one pixel P is composed of six sub-pixels).
  • two virtual pixels a first virtual pixel and a second virtual pixel
  • two virtual pixels are configured for one pixel P in the multi-primary color display panel 10 that performs display using five primary colors
  • the tristimulus values of the primary colors displayed by each sub-pixel are as shown in Table 9 below.
  • R1 One of the two red sub-pixels R is denoted as R1, and the other is denoted as R2.
  • a pixel that forms a flat portion of the luminance distribution in the virtual pixel is determined. If two sub-pixels of the six sub-pixels form a flat portion in order to sufficiently improve the high frequency reproducibility, the six sub-pixels include two sub-pixels belonging to only the first virtual pixel, the second sub-pixel, They are classified into two sub-pixels belonging to only the virtual pixel and two sub-pixels belonging to both virtual pixels. Considering that the tristimulus values (Xi, Yi, Zi) of the virtual pixel are as close as possible to the ideal values (Xg, Yg, Zg) in order to suppress flicker and artifacts, 50% with only one subpixel.
  • the blue sub-pixel B having the above output and the yellow sub-pixel Ye having an output close to 50% are not used as sub-pixels forming the flat portion. Therefore, the two sub-pixels, the blue sub-pixel B and the yellow sub-pixel Ye, belong to both virtual pixels. As a result, the remaining four sub-pixels (red sub-pixels R1 and R2, green sub-pixel G, and cyan sub-pixel C) form a flat portion.
  • the four sub-pixels forming the flat portion are distributed to two virtual pixels.
  • one red sub-pixel R is assigned to each of the two virtual pixels, and the red color is assigned to the first virtual pixel. It is assumed that the sub pixel R1 and the cyan sub pixel C belong, and the red sub pixel R2 and the green sub pixel G belong to the second virtual pixel.
  • the weights of the blue sub-pixel B and the yellow sub-pixel Ye belonging to both virtual pixels are determined.
  • the weight is determined so as to minimize the color difference between the two virtual pixels.
  • the luminance value Y of each of the two virtual pixels is ideal in consideration of the visual characteristic that the sensitivity to the luminance change is high in the high frequency range.
  • the color difference was minimized while limiting the value so as to be 50. Thereby, all the weights for constructing the virtual pixel could be obtained.
  • the subpixel arrangement within the pixel P is determined.
  • the blue sub-pixel B and the yellow sub-pixel Ye belonging to both virtual pixels are arranged at intervals of two sub-pixels, and other sub-pixels are arranged so that the luminance distribution of each virtual pixel satisfies the conditions already described.
  • Table 10 below shows the optimum sub-pixel arrangement (sub-pixel position in the pixel), the distribution pattern to the virtual pixel (primary color weight in each virtual pixel), and the luminance distribution of the virtual pixel determined as described above.
  • Table 11 below shows the tristimulus values and the color differences (luminance difference ⁇ Y S and chromaticity difference ⁇ u′v ′) at the maximum output of each virtual pixel.
  • each of the first virtual pixel and the second virtual pixel has only one convex portion and a flat portion where the luminance is zero.
  • the width of the convex portion in the luminance distribution of the first virtual pixel is the same as the width of the convex portion in the luminance distribution of the second virtual pixel (both are for four sub-pixels).
  • the color difference between the tristimulus values of the first virtual pixel and the second virtual pixel has a preferable threshold value ⁇ E th (3% luminance difference ⁇ Y S and 0.050 chromaticity difference ⁇ u ′. It can be seen that it is smaller than v ').
  • each pixel P includes one red subpixel R, one green subpixel G, one blue subpixel B, one cyan subpixel C, one magenta subpixel M, and one yellow subpixel Ye (that is, one pixel P includes six subpixels).
  • An example in which two virtual pixels (a first virtual pixel and a second virtual pixel) are configured for one pixel P in the multi-primary color display panel 10 that includes pixels and performs display using six primary colors) will be described.
  • the primary color tristimulus values displayed by each sub-pixel are as shown in Table 12 below.
  • Table 13 below shows the optimal sub-pixel arrangement (sub-pixel position within the pixel), the distribution pattern to the virtual pixels (primary color weights in each virtual pixel), and the luminance distribution of the virtual pixels similarly determined for this example.
  • Table 14 below shows the tristimulus values and the color differences (luminance difference ⁇ Y S and chromaticity difference ⁇ u′v ′) at the maximum output of each virtual pixel.
  • each of the first virtual pixel and the second virtual pixel has only one convex portion and a flat portion where the luminance is zero.
  • the width of the convex portion in the luminance distribution of the first virtual pixel is the same as the width of the convex portion in the luminance distribution of the second virtual pixel (both are for four sub-pixels).
  • the color difference between the tristimulus values of the first virtual pixel and the second virtual pixel has a preferable threshold value ⁇ E th (3% luminance difference ⁇ Y S and 0.050 chromaticity difference ⁇ u ′. It can be seen that it is smaller than v ').
  • each pixel P includes one red subpixel R, one green subpixel G, one blue subpixel B, one cyan subpixel C, one magenta subpixel M, and one yellow subpixel Ye (that is, one pixel P includes six subpixels).
  • three virtual pixels first virtual pixel, second virtual pixel, and third virtual pixel are formed for each pixel P. An example will be described.
  • the primary color tristimulus values displayed by each sub-pixel are as shown in Table 15 below.
  • Table 16 below shows the optimal sub-pixel arrangement (sub-pixel position in the pixel), the distribution pattern to the virtual pixels (primary color weight in each virtual pixel), and the luminance distribution of the virtual pixels determined in the same manner for this example. Show.
  • Table 17 below shows the tristimulus values and the color differences (luminance difference ⁇ Y S and chromaticity difference ⁇ u′v ′) between the virtual pixels at the maximum output.
  • each of the first virtual pixel, the second virtual pixel, and the third virtual pixel has only one convex portion and a flat portion where the luminance is zero. Further, the width of the convex portion in the luminance distribution of the first virtual pixel, the width of the convex portion in the luminance distribution of the second virtual pixel, and the width of the convex portion in the luminance distribution of the third virtual pixel are approximately the same (respectively 4 subpixels, 3 subpixels, 3 subpixels).
  • the color difference between any two tristimulus values of the first virtual pixel, the second virtual pixel, and the third virtual pixel is a preferable threshold ⁇ E th (a luminance difference ⁇ Y of 5%). It can be seen that the chromaticity difference ⁇ u′v ′) of S and 0.200 is smaller.
  • each pixel P includes one red sub-pixel R, one green sub-pixel G, one blue sub-pixel B, and one yellow sub-pixel Ye (that is, one pixel P is composed of four sub-pixels and uses four primary colors).
  • Table 18 shows the chromaticity points and tristimulus values of the primary colors displayed by each sub-pixel in this example. Table 18 also shows the optimal sub-pixel arrangement (sub-pixel position within the pixel), the distribution pattern to the virtual pixel (primary color weight in each virtual pixel), and the luminance distribution of the virtual pixel determined for this example. It is shown.
  • both the first virtual pixel and the second virtual pixel have only one convex portion and a flat portion where the luminance is zero. Further, the width of the convex portion in the luminance distribution of the first virtual pixel is the same as the width of the convex portion in the luminance distribution of the second virtual pixel (both are for three sub-pixels).
  • each pixel P includes one red sub-pixel R, one green sub-pixel G, one blue sub-pixel B, and one cyan sub-pixel C (that is, one pixel P is composed of four sub-pixels and uses four primary colors).
  • an example in which two virtual pixels (a first virtual pixel and a second virtual pixel) are configured per pixel P in the multi-primary color display panel 10 will be described.
  • Table 19 shows the chromaticity points and tristimulus values of the primary colors displayed by each sub-pixel in this example. Table 19 also shows the optimal sub-pixel arrangement (sub-pixel position in the pixel), the distribution pattern to the virtual pixel (primary color weight in each virtual pixel), and the luminance distribution of the virtual pixel determined for this example. It is shown.
  • both the first virtual pixel and the second virtual pixel have only one convex portion and a flat portion where the luminance is zero. Further, the width of the convex portion in the luminance distribution of the first virtual pixel is the same as the width of the convex portion in the luminance distribution of the second virtual pixel (both are for three sub-pixels).
  • each pixel P includes one red sub-pixel R, one green sub-pixel G, one blue sub-pixel B, one cyan sub-pixel C, and one yellow sub-pixel Ye (that is, one pixel P is composed of five sub-pixels.
  • Table 20 shows the chromaticity points and tristimulus values of the primary colors displayed by each sub-pixel in this example. Table 20 also shows the optimal sub-pixel arrangement (sub-pixel position in the pixel), the distribution pattern to the virtual pixel (primary color weight in each virtual pixel), and the luminance distribution of the virtual pixel determined for this example. It is shown.
  • each of the first virtual pixel and the second virtual pixel has only one convex portion and a flat portion where the luminance is zero. Further, the width of the convex portion in the luminance distribution of the first virtual pixel is the same as the width of the convex portion in the luminance distribution of the second virtual pixel (both are for four sub-pixels).
  • each pixel P includes one red sub-pixel R, one green sub-pixel G, one blue sub-pixel B, one yellow sub-pixel Ye, and one white pixel W (that is, one pixel P is composed of five sub-pixels,
  • two virtual pixels a first virtual pixel and a second virtual pixel
  • pixel P is composed of five sub-pixels
  • Table 21 shows the chromaticity points and tristimulus values of the primary colors displayed by each sub-pixel in this example. Table 21 also shows the optimal sub-pixel arrangement (sub-pixel position in the pixel), the distribution pattern to the virtual pixels (primary color weight in each virtual pixel), and the luminance distribution of the virtual pixels determined for this example. It is shown.
  • each of the first virtual pixel and the second virtual pixel has only one convex portion and a flat portion where the luminance is zero. Further, the width of the convex portion in the luminance distribution of the first virtual pixel is the same as the width of the convex portion in the luminance distribution of the second virtual pixel (both are for four sub-pixels).
  • the present invention it is possible to provide a multi-primary color display device capable of displaying an image with the same or higher resolution without reducing the sub-pixel size as compared with the three primary color display device. Since the multi-primary color display device according to the present invention can perform high-quality display, it is suitably used for various electronic devices such as liquid crystal televisions.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

Le dispositif d'affichage à couleurs multi-primaires selon la présente invention comporte des pixels multiples (P) qui sont agencés sous une forme matricielle contenant des rangées multiples et des colonnes multiples, chaque pixel (P) étant composé d'au moins quatre sous-pixels (SP1 à SP6) qui présentent différentes couleurs les uns par rapport aux autres. Les multiples sous-pixels (SP1 à SP6) qui constituent chaque pixel (P) comportent chacun au moins deux sous-pixels, et sont affectés à deux pixels virtuels (VP1, VP2) qui contiennent un sous-pixel commun. Le dispositif d'affichage à couleurs multi-primaires en question présente chacun des deux sous-pixels virtuels (VP1, VP2) en tant qu'afficheur couleur minimum. La différence en luminance (ΔYS) et la différence en chromaticité (Δu'v') entre les valeurs trichromatiques survenant au moment de la production maximale des deux pixels virtuels (VP1, VP2) satisfont aux corrélations suivantes, à savoir ΔYS < 5 % et Δu'v' < 0,100. La présente invention permet d'obtenir un dispositif d'affichage à couleurs multi-primaires qui est apte à afficher des images avec une résolution égale ou supérieure par rapport à celles d'un dipositif d'affichage à trois couleurs primaires, sans pour autant réduire la taille des sous-pixels.
PCT/JP2011/076067 2010-11-15 2011-11-11 Dispositif d'affichage à couleurs multi-primaires WO2012067037A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-254574 2010-11-15
JP2010254574 2010-11-15

Publications (1)

Publication Number Publication Date
WO2012067037A1 true WO2012067037A1 (fr) 2012-05-24

Family

ID=46083969

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/076067 WO2012067037A1 (fr) 2010-11-15 2011-11-11 Dispositif d'affichage à couleurs multi-primaires

Country Status (1)

Country Link
WO (1) WO2012067037A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014077179A1 (fr) * 2012-11-14 2014-05-22 シャープ株式会社 Dispositif d'affichage multicouleur primaire
WO2014087963A1 (fr) * 2012-12-05 2014-06-12 シャープ株式会社 Dispositif d'affichage multicouleur primaire
US9311841B2 (en) 2011-09-07 2016-04-12 Sharp Kabushiki Kaisha Multi-primary colour display device
WO2018228047A1 (fr) * 2017-06-15 2018-12-20 京东方科技集团股份有限公司 Dispositif d'affichage et son procédé de commande
US10255837B2 (en) 2014-12-03 2019-04-09 Japan Display Inc. Image display device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004529396A (ja) * 2001-06-11 2004-09-24 ゲノア・テクノロジーズ・リミテッド カラーディスプレイ用の装置、システム、および方法
JP2005062833A (ja) * 2003-07-29 2005-03-10 Seiko Epson Corp カラーフィルタ、カラー画像表示装置および電子機器
JP2005523465A (ja) * 2002-04-11 2005-08-04 ジェノア・カラー・テクノロジーズ・リミテッド 属性を向上させるカラー表示装置および方法
WO2007097080A1 (fr) * 2006-02-27 2007-08-30 Sharp Kabushiki Kaisha Affichage a cristaux liquides
WO2008090845A1 (fr) * 2007-01-25 2008-07-31 Sharp Kabushiki Kaisha Dispositif d'affichage en multi-couleurs primaires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004529396A (ja) * 2001-06-11 2004-09-24 ゲノア・テクノロジーズ・リミテッド カラーディスプレイ用の装置、システム、および方法
JP2005523465A (ja) * 2002-04-11 2005-08-04 ジェノア・カラー・テクノロジーズ・リミテッド 属性を向上させるカラー表示装置および方法
JP2005062833A (ja) * 2003-07-29 2005-03-10 Seiko Epson Corp カラーフィルタ、カラー画像表示装置および電子機器
WO2007097080A1 (fr) * 2006-02-27 2007-08-30 Sharp Kabushiki Kaisha Affichage a cristaux liquides
WO2008090845A1 (fr) * 2007-01-25 2008-07-31 Sharp Kabushiki Kaisha Dispositif d'affichage en multi-couleurs primaires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KAZUYOSHI YOSHIYAMA ET AL.: "High Resolution Reproducibility of Multi-Primary Color Displays", PROCEEDINGS OF THE 17TH INTERNATIONAL DISPLAY WORKSHOPS, 1 December 2010 (2010-12-01), pages 1357 - 1359, XP008166003 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9311841B2 (en) 2011-09-07 2016-04-12 Sharp Kabushiki Kaisha Multi-primary colour display device
WO2014077179A1 (fr) * 2012-11-14 2014-05-22 シャープ株式会社 Dispositif d'affichage multicouleur primaire
US9583054B2 (en) 2012-11-14 2017-02-28 Sharp Kabushiki Kaisha Multi-primary color display device
WO2014087963A1 (fr) * 2012-12-05 2014-06-12 シャープ株式会社 Dispositif d'affichage multicouleur primaire
US10255837B2 (en) 2014-12-03 2019-04-09 Japan Display Inc. Image display device
WO2018228047A1 (fr) * 2017-06-15 2018-12-20 京东方科技集团股份有限公司 Dispositif d'affichage et son procédé de commande
US10769984B2 (en) 2017-06-15 2020-09-08 Beijing Boe Display Technology Co., Ltd. Display device and driving method thereof

Similar Documents

Publication Publication Date Title
JP5890832B2 (ja) 多原色表示装置
WO2014077179A1 (fr) Dispositif d&#39;affichage multicouleur primaire
WO2013035679A1 (fr) Dispositif d&#39;affichage à multiples couleurs primaires
JP5863925B2 (ja) 制御装置及び制御方法
JP4913161B2 (ja) 多原色表示装置
KR101599651B1 (ko) 다원색 이미지 디스플레이 패널을 포함하는 디스플레이 장치 상에 디스플레이되는 이미지 데이터를 처리하는 방법
WO2011102343A1 (fr) Dispositif d&#39;affichage
US7755652B2 (en) Color flat panel display sub-pixel rendering and driver configuration for sub-pixel arrangements with split sub-pixels
WO2012067038A1 (fr) Dispositif d&#39;affichage à couleurs multi-primaires
US9542875B2 (en) Signal processing method, signal processor, and display device including signal processor
JP4861523B2 (ja) 表示装置およびテレビ受信装置
US20120242719A1 (en) Multi-primary display
JP2010277095A (ja) 多原色表示装置及び液晶表示装置
WO2015152004A1 (fr) Dispositif d&#39;affichage à multiples couleurs primaires
US7843473B2 (en) Matrix display with gamma correction based on gamma characteristics pairs and different input transmittance level
CN104978920B (zh) 像素阵列、显示装置及其显示方法
WO2012176800A1 (fr) Dispositif d&#39;affichage d&#39;image
KR100706257B1 (ko) 액정 표시 장치 및 그의 구동 방법
WO2012005170A1 (fr) Appareil d&#39;affichage à cristaux liquides présentant plusieurs couleurs primaires
WO2012067037A1 (fr) Dispositif d&#39;affichage à couleurs multi-primaires
CN106560880A (zh) 显示装置和该显示装置的图像渲染方法
JP5843566B2 (ja) 多原色表示装置
CN109817158A (zh) 显示面板的驱动方法、装置及显示装置
JP4944461B2 (ja) 画像表示装置
JP2017181834A (ja) 多原色表示装置およびテレビジョン受像機

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: 11841837

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: 11841837

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP