JP2010097176A - Image display and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display with which a display brighter than that provided via an RGB mode and an RGBC mode and closer to primary colors than that provided via a CMY mode is achieved, and to provide a method for manufacturing the same. <P>SOLUTION: The image display: includes a pixel composed of subpixels having two colors selected from red (R), green (G), and blue (B) and complementary colors of two colors selected from red (R), green (G), and blue (B), composed of these four colors in total; and includes a substrate, a color filter formed on the substrate, a thin film transistor array formed on the color filter, a display medium formed on the thin film transistor array, and a counter electrode formed on the display medium, wherein the image display is either a reflective display or a transflective display. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display device and a method for manufacturing the same, and more particularly to a reflective image display device that is easy to see even in a dim surrounding and a method for manufacturing the same.

  As an image display device using three primary colors of light, red (R), green (G), and blue (B) as subpixels, a liquid crystal display device using a backlight, an electroluminescence (EL) display device, and the like Is popular. These are bright and easy to see, but consume a lot of power.

On the other hand, in recent years, a reflective image display device such as a reflective liquid crystal that does not use a backlight has been developed and attracts attention in terms of energy saving. In the reflection type image display devices described in Patent Documents 1 and 2, when RGB is used, light use efficiency is poor and only dark display is possible. Therefore, cyan (C), magenta (M), and yellow (Y) are used as sub-pixels. Has been disclosed. However, there is no description of the conversion formula in Patent Document 1, and the following formula is described in Patent Document 2 (see Patent Documents 1 and 2).
C = (G + B) / 2 Formula 7.1
M = (B + R) / 2 Formula 7.2
Y = (R + G) / 2 Formula 7.3

Expressions 7.1 to 7.3 described above are simple. For example, when G and B are increased, not only C but also M and Y are necessarily increased, so that the overall display is always whitish. For example, even when R = 0 and G = B = 1 (cyan), C = 1 and M = Y = 1/2, and the display is whiter than cyan. This is disadvantageous when the color looks good, for example using a reflective image display device in a bright environment. Alternatively, the following formula is described. In Patent Document 2, although described as R, G, B = 0 to 255, it is described as 0 to 1 here.
^{C = (G + B + G} 2 + B 2 -RG-GB-2BR + 2RGB) / 2 Equation 8.1
M = (R + B + R ² + B ² −RG−2GB−BR + 2RGB) / 2 Equation 8.2
Y = (R + G + R ² + G ² −2RG−GB−BR + 2RGB) / 2 Formula 8.3
Equations 8.1 to 8.3 are probably incorrect, and the following equation is assumed.
^{C = (G + B + G} 2 + B 2 -RG-2GB-BR + 2RGB) / 2 Equation 8.4
^{M = (R + B + R} 2 + B 2 -RG-GB-2BR + 2RGB) / 2 Equation 8.5
Y = (R + G + R ² + G ² −2RG−GB−BR + 2RGB) / 2 Formula 8.6
However, these formulas 8.4 to 8.6 are complicated and, as with formulas 7.1 to 7.3, the display is always whitish as a whole. For example, even when R = 0 and G = B = 1 (cyan), C = 1 and M = Y = 1/2, and the display is whiter than cyan. This is disadvantageous when the color looks good, for example using a reflective image display device in a bright environment. Patent Document 3 discloses RGBC in which C is added to RGB (see Patent Document 3).

JP-A-5-241143 JP 11-272244 A JP 2007-121325 A

  An object of the present invention is to provide an image display device that is brighter than the RGB system and the RGBC system, and capable of displaying images closer to the primary colors than the CMY system, and a manufacturing method thereof.

  According to the first aspect of the present invention, one pixel has two colors of red (R), green (G), and blue (B), and red (R), green (G), and blue (B). The image display apparatus is characterized by comprising a total of four sub-pixels, two of which are complementary colors.

  According to a second aspect of the present invention, there is provided a substrate, a color filter formed on the substrate, a thin film transistor array formed on the color filter, a display medium formed on the thin film transistor array, and a display medium An image display device comprising the counter electrode formed, wherein the image display device is a reflective display device or a transflective display device. is there.

  The invention according to claim 3 of the present invention is the image display device according to claim 2, wherein the display medium is a liquid crystal or an electrophoretic material.

  The invention according to claim 4 of the present invention is the image display device according to claim 2 or 3, wherein the substrate and the thin film transistor array are substantially transparent and display is performed on the substrate side. .

  In the invention according to claim 5 of the present invention, the color filter includes two colors of red (R), green (G), and blue (B), and red (R), green (G), and blue (B). 5. The image display device according to claim 2, comprising a total of four sub-pixels, two of which are complementary colors. 6.

  According to the sixth aspect of the present invention, from the color data of red (Ri), green (Gi), and blue (Bi), when Ri + Gi> 0, C0 = (2 + k) / (2 + 2k) × Bi × (Gi + k). × Bi) / (Ri + Gi + k × Bi), M0 = (2 + k) / (2 + 2k) × Bi × (Ri + k × Bi) / (Ri + Gi + k × Bi), R0 = max (Ri−M0,0), G0 = max (Gi -C0,0), MIN = min (R0, G0, C0, M0), MAX = max (R0, G0, C0, M0), C = C0 × MIN / MAX + C0, M = M0 × MIN / MAX + M0, R = When R0 × MIN / MAX + R0, G = G0 × MIN / MAX + G0, Ri = Gi = 0, C = M = (2 + k) / (2 + 2k) × Bi, R = G = 0, where k is 0 or more and 1 or less Real number) Is obtained by the image display apparatus according to any one of claims 1 to 5, characterized in that it has a data converting means for obtaining color data of the color display RGC (cyan) M (magenta).

  According to the seventh aspect of the present invention, from the color data of red (Ri), green (Gi), and blue (Bi), when Ri + Gi ≧ Bi> 0, C0 = Bi × Gi / (Ri + Gi), M0 = Bi × Ri / (Ri + Gi), R0 = max (Ri−M0,0), G0 = max (Gi−C0,0), C1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × C0, M1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × M0, MIN = min (R0, G0, C1, M1), MAX = max (R0, G0, C1, M1), C = C1 × MIN / MAX + C1, M = M1 × MIN / When MAX + M1, R = R0 × MIN / MAX + R0, G = G0 × MIN / MAX + G0, Bi> Ri + Gi> 0, C0 = Bi × (Gi−Ri + Bi) / (Ri + i + Bi), M0 = Bi × (Ri−Gi + Bi) / (Ri + Gi + Bi), R0 = max (Ri−M0,0), G0 = max (Gi−C0,0), C1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0) ) × C0, M1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × M0, MIN = min (R0, G0, C1, M1), MAX = max (R0, G0, C1, M1), C = C1 × MIN / MAX + C1, M = M1 × MIN / MAX + M1, R = R0 × MIN / MAX + R0, G = G0 × MIN / MAX + G0, Ri + Gi = 0, C = M = Bi / 4, R = G = 0 for color display 6. A data conversion means for obtaining RGC (cyan) M (magenta) color data. This is an image display device.

  In the invention according to claim 8 of the present invention, when Gi + Bi> 0 from the color data of red (Ri), green (Gi), and blue (Bi), M0 = (2 + k) / (2 + 2k) × Ri × (Bi + k). × Ri) / (Gi + Bi + k × Ri), Y0 = (2 + k) / (2 + 2k) × Ri × (Gi + k × Ri) / (Gi + Bi + k × Ri), G0 = max (Gi−Y0,0), B0 = max (Bi) -M0,0), MIN = min (G0, B0, M0, Y0), MAX = max (G0, B0, M0, Y0), M = M0 × MIN / MAX + M0, Y = Y0 × MIN / MAX + Y0, G = When G0 × MIN / MAX + G0, B = B0 × MIN / MAX + B0, Gi = Bi = 0, M = Y = (2 + k) / (2 + 2k) × Ri, G = B = 0, where k is 0 or more and 1 or less Real number) Is obtained by the image display apparatus according to any one of claims 1 to 5, characterized in that it has a data converting means for obtaining color data of the color display GBM (magenta) Y (yellow).

  The invention according to claim 9 of the present invention is based on the color data of red (Ri), green (Gi), and blue (Bi). When Gi + Bi ≧ Ri> 0, M0 = Ri × Bi / (Gi + Bi), Y0 = Ri × Gi / (Gi + Bi), G0 = max (Gi−Y0,0), B0 = max (Bi−M0,0), M1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × M0, Y1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × Y0, MIN = min (G0, B0, M1, Y1), MAX = max (G0, B0, M1, Y1), M = M1 × MIN / MAX + M1, Y = Y1 × MIN / When MAX + Y1, G = G0 × MIN / MAX + G0, B = B0 × MIN / MAX + B0, Ri> Gi + Bi> 0, M0 = Ri × (Bi−Gi + Ri) / (Ri + i + Bi), Y0 = Ri × (Gi−Bi + Ri) / (Ri + Gi + Bi), G0 = max (Gi−Y0,0), B0 = max (Bi−M0,0), M1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0) ) × M0, Y1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × Y0, MIN = min (G0, B0, M1, Y1), MAX = max (G0, B0, M1, Y1), M = M1 × MIN / MAX + M1, Y = Y1 × MIN / MAX + Y1, G = G0 × MIN / MAX + G0, B = B0 × MIN / MAX + B0, Gi + Bi = 0, M = Y = Ri / 4, G = B = 0 for color display 6. A data conversion means for obtaining color data of GBM (magenta) Y (yellow), according to any one of claims 1 to 5. This is an image display device.

  According to the tenth aspect of the present invention, when Bi + Ri> 0 from the color data of red (Ri), green (Gi), and blue (Bi), Y0 = (2 + k) / (2 + 2k) × Gi × (Ri + k). × Gi) / (Bi + Ri + k × Gi), C0 = (2 + k) / (2 + 2k) × Gi × (Bi + k × Gi) / (Bi + Ri + k × Gi), B0 = max (Bi−C0,0), R0 = max (Ri) −Y0,0), MIN = min (B0, R0, Y0, C0), MAX = max (B0, R0, Y0, C0), Y = Y0 × MIN / MAX + Y0, C = C0 × MIN / MAX + C0, B = When B0 × MIN / MAX + B0, R = R0 × MIN / MAX + R0, Bi = Ri = 0, Y = C = (2 + k) / (2 + 2k) × Gi, B = R = 0, where k is 0 or more and 1 or less Real number) Is obtained by the image display apparatus according to any one of claims 1 to 5, characterized in that it has a data converting means for obtaining color data of a color display BRY (yellow) C (cyan).

  According to the eleventh aspect of the present invention, from the color data of red (Ri), green (Gi), and blue (Bi), when Bi + Ri ≧ Gi> 0, Y0 = Gi × Ri / (Bi + Ri), C0 = Gi × Bi / (Bi + Ri), B0 = max (Bi−C0,0), R0 = max (Ri−Y0,0), Y1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × Y0, C1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × C0, MIN = min (B0, R0, Y1, C1), MAX = max (B0, R0, Y1, C1), Y = Y1 × MIN / MAX + Y1, C = C1 × MIN / When MAX + C1, B = B0 × MIN / MAX + B0, R = R0 × MIN / MAX + R0, Gi> Bi + Ri> 0, Y0 = Gi × (Ri−Bi + Gi) / (Ri Gi + Bi), C0 = Gi × (Bi−Ri + Gi) / (Ri + Gi + Bi), B0 = max (Bi−C0,0), R0 = max (Ri−Y0,0), Y1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0) ) × Y0, C1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × C0, MIN = min (B0, R0, Y1, C1), MAX = max (B0, R0, Y1, C1), Y = Y1 × MIN / MAX + Y1, C = C1 × MIN / MAX + C1, B = B0 × MIN / MAX + B0, R = R0 × MIN / MAX + R0, Bi + Ri = 0, Y = C = Gi / 4, B = R = 0 for color display 6. A data conversion means for obtaining color data of BRY (yellow) C (cyan), according to any one of claims 1 to 5. This is an image display device.

  According to a twelfth aspect of the present invention, a substrate is prepared, and one pixel on the substrate has two colors of red (R), green (G), and blue (B), and red (R) and green. (G), sub-pixels of a total of four colors of two complementary colors of blue (B) are formed, and a thin film transistor array including a capacitor electrode and a pixel electrode is formed on the sub-pixel. And a display medium is sandwiched between the thin film transistor array and a counter electrode formed on another substrate.

  The invention according to claim 13 of the present invention is the method for manufacturing an image display device according to claim 12, wherein the display medium is a liquid crystal or an electrophoretic material.

  According to the present invention, it is possible to provide an image display device that can display brighter than the RGB system and the RGBC system and has better color purity than the CMY system.

(A)-(j) is the schematic plan view and chromaticity diagram which show the example of arrangement | positioning of the color filter of the image display apparatus which concerns on embodiment of this invention. (A)-(j) is the schematic plan view and chromaticity diagram which show the example of arrangement | positioning of the color filter of the image display apparatus which concerns on embodiment of this invention. (A)-(j) is the schematic plan view and chromaticity diagram which show the example of arrangement | positioning of the color filter of the image display apparatus which concerns on embodiment of this invention. (A) And (b) is a schematic sectional drawing which shows an electronic paper as an example of the image display apparatus which concerns on embodiment of this invention. (A) And (b) is a schematic sectional drawing which shows a reflection type liquid crystal display device as an example of the image display apparatus which concerns on embodiment of this invention. (A) And (b) is a schematic sectional drawing which shows the example of a transflective liquid crystal display device as an example of the image display apparatus which concerns on embodiment of this invention. (A)-(e) is a schematic plan view and schematic sectional drawing which show an example of the manufacturing process of the image display apparatus which concerns on embodiment of this invention. (A)-(e) is a schematic plan view and schematic sectional drawing which show an example of the manufacturing process of the image display apparatus which concerns on embodiment of this invention.

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

  FIGS. 1A to 1J to 3A to 3J are a schematic plan view and a chromaticity diagram showing an example of arrangement of color filters of the image display device according to the embodiment of the present invention. As shown in FIGS. 1A to 1J to FIGS. 3A to 3J, the image display device according to the embodiment of the present invention includes red (R), green (G), and blue (B ) And four complementary sub-pixels of the two colors. Here, since the complementary colors of R, G, and B are cyan (C), magenta (M), and yellow (Y), respectively, as shown in FIGS. 1A to 1I, RGCM and FIG. As shown in FIGS. 3A to 3I, GBMY is included, and as shown in FIGS. 3A to 3I, BRYC is included. As shown in FIGS. 1A to 1D to FIGS. 3A to 3D, the top and bottom of the subpixels may be interchanged in the adjacent pixels, the left and right may be interchanged, and the top, bottom, left and right may be interchanged. Further, as shown in FIGS. 1E to 1I to FIGS. 3E to 3I, the arrangement in the sub-pixels is also arbitrary.

  In addition, although there is usually a slight gap between the sub-pixels of the color filter 11 in FIGS. 1A to 1I to FIGS. 3A to 3I, only the overcoat layer is attached to that portion. It may be white or may be black using Cr or black resist.

  Here, when one pixel is composed of RGB, the light use efficiency in the color filter is ideally 1/3 each, and the overall average is also 1/3. When one pixel is CMY, the light use efficiency in the color filter is 2/3 each, and the overall average is 2/3. Further, when CMY is used for one pixel, there is a disadvantage that pure red, green, and blue cannot be displayed, but there is an advantage that it is bright.

  On the other hand, when one pixel is RGBC, it seems that the light utilization efficiency in the color filter is ((1/3) × 3 + 2/3) / 4 = 5/12 on average. However, when RGBC is fully lit, the color becomes cyan rather than white, so the utilization efficiency in the case of white is lit only for RGB ((1/3) × 3 + 0) / 4 = 1/4. is there.

  As shown in FIGS. 1A to 1I, when one pixel is an RGCM, the light use efficiency in the color filter is 1/3 for each RG and 2/3 for the CM. The overall average is ½. Moreover, it turns white when all the lights are on. That is, the brightness is brighter than that of the RGB method or RGBC method. As shown in FIG. 1 (j), in the case where one pixel is RGCM, the vicinity of pure B is slightly whitened, but the portions of G to C and MR are better in color purity than RGB and CMY. This is because vivid color filters having hues outside the RGB triangles can be used as C and M. For example, when the chromaticity (x, y) is R (0.42, 0.29), G (0.30, 0.44), and B (0.20, 0.26), C (0.17) , 0.31) and M (0.40, 0.21) are outside. In this case, display with better color purity can be achieved by displaying with the C and M pixels than when displaying C with the G and B pixels and displaying M with the B and R pixels. In the embodiment of the present invention, the display with the C pixel or the M pixel is expressed as “brilliant C” or “brilliant M”. Therefore, it is suitable for displaying a photograph of food with many G to C components and M to R components. However, it is not limited to the use.

In order to display the color given by the RGB data (Ri, Gi, Bi) in RGCM, for example, the following equation can be used. However, Ri, Gi, Bi shall take the value of 0-1.
When Ri + Gi> 0 C = Bi × Gi / (Ri + Gi) Equation 1.1
M = Bi × Ri / (Ri + Gi) Equation 1.2
R = max (Ri−M, 0) Equation 1.3
G = max (Gi−C, 0) Equation 1.4
When Ri = Gi = 0 C = M = Bi / 2 Formula 1.5
R = G = 0 Formula 1.6
However, max (A, B) is a function which takes the largest value among A and B.

  In Formula 1.1 to Formula 1.6, when close to pure B, Ri-M and Gi-C are negative and R = G = 0. However, the other colors are kept as they are, and the normal image display is hardly affected. For example, when Ri = 1, Gi = Bi = 0 (red), R = 1, C = M = G = 0 and pure red is obtained. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, C = M = R = 0 and pure green is obtained. In the case of Bi = 1, Ri = Gi = 0 (blue), C = M = 1/2 and R = G = 0. For example, when Ri = 0 and Gi = Bi = 1 (cyan), C = 1, M = R = G = 0, and vivid cyan. When Gi = 0 and Bi = Ri = 1 (magenta), M = 1, C = R = G = 0, and vivid magenta is obtained. In the case of Bi = 0 and Ri = Gi = 1 (yellow), C = M = 0 and R = G = 1, resulting in pure yellow. For example, when Ri = Gi = Bi = 1 (white), C = M = R = G = 1/2, and the light use efficiency = ((2/3) × (1/2) × 2 + ( 1/3) × (1/2) × 2) / 4 = 1/4.

Alternatively, the color given by the RGB data (Ri, Gi, Bi) can be displayed in color by the RGCM, for example, by the following formula. However, Ri, Gi, Bi shall take the value of 0-1.
When Ri + Gi> 0 C = (2 + k) / (2 + 2k) × Bi × (Gi + k × Bi) / (Ri + Gi + k × Bi) Equation 1.1A
M = (2 + k) / (2 + 2k) × Bi × (Ri + k × Bi) / (Ri + Gi + k × Bi) Equation 1.2A
R = max (Ri−M, 0) Formula 1.3A
G = max (Gi−C, 0) Equation 1.4A
When Ri = Gi = 0 C = M = (2 + k) / (2 + 2k) × Bi 1.5A
R = G = 0 Formula 1.6A
However, max (A, B) is a function which takes the largest value among A and B. K is a real number not less than 0 and not more than 1. For k = 0, equations 1.1A-1.6A are consistent with equations 1.1-1.6.

In Formula 1.1A to Formula 1.6A, when close to pure B, Ri-M and Gi-C are negative, and R = G = 0. However, the other colors are kept almost as they are, and the normal image display is hardly affected. For example, when Ri = 1, Gi = Bi = 0 (red), R = 1, C = M = G = 0 and pure red is obtained. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, C = M = R = 0 and pure green is obtained. In the case of Bi = 1, Ri = Gi = 0 (blue), C = M = 1/2 and R = G = 0. For example, when Ri = 0 and Gi = Bi = 1 (cyan), C = (2 + k) / (2 + 2k) ≈1, M = (2 + k) k / (2 (1 + k) ² ) ≈0, R = 0, G = K / (2 + 2k) ≈0, and the color is close to vivid cyan. In the case of Gi = 0, Bi = Ri = 1 (magenta), C = (2 + k) k / (2 (1 + k) ² ) = 0, M = (2 + k) / (2 + 2k) ≈1, R = k / (2 + 2k ) ≈0, G = 0, so that the color is close to vivid magenta. In the case of Bi = 0 and Ri = Gi = 1 (yellow), C = M = 0 and R = G = 1, resulting in pure yellow. For example, when Ri = Gi = Bi = 1 (white), C = M = R = G = 1/2, and the light use efficiency = ((2/3) × (1/2) × 2 + ( 1/3) × (1/2) × 2) / 4 = 1/4.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be displayed in color by RGCM, for example, by the following equation. However, Ri, Gi, Bi shall take the value of 0-1.
When Ri + Gi> 0 C0 = Bi × Gi / (Ri + Gi) Equation 2.1
M0 = Bi × Ri / (Ri + Gi) Equation 2.2
R0 = max (Ri−M0,0) Formula 2.3
G0 = max (Gi−C0,0) Equation 2.4
MIN = min (R0, G0, C0, M0) Equation 2.5
MAX = max (R0, G0, C0, M0) Equation 2.6
C = C0 × MIN / MAX + C0 Formula 2.7
M = M0 × MIN / MAX + M0 Formula 2.8
R = R0 × MIN / MAX + R0 Formula 2.9
G = G0 × MIN / MAX + G0 Formula 2.10
When Ri = Gi = 0 C = M = Bi / 2 Equation 2.11.
R = G = 0 Formula 2.12
However, max (A, B,...) Is a function that takes the largest value of A and B, and min (A, B,...) Takes the smallest value of A and B. It is a function.

  In Expression 2.1 to Expression 2.12, R, G, C, and M are brighter by (MIN / MAX) than R0, G0, C0, and M0. For example, when Ri = Gi = Bi = 1 (white), R = G = C = M = 1, and light utilization efficiency = ((2/3) × 1 × 2 + (1/3) × 1 × 2) / 4 = 1/2. For example, when Ri = 1, Gi = Bi = 0 (red), R = 1, C = M = G = 0, and pure red is obtained. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, C = M = R = 0 and pure green is obtained. In the case of Bi = 1, Ri = Gi = 0 (blue), C = M = 1/2 and R = G = 0. For example, when Ri = 0 and Gi = Bi = 1 (cyan), C = 1, M = R = G = 0, and vivid cyan. When Gi = 0 and Bi = Ri = 1 (magenta), M = 1, C = R = G = 0, and vivid magenta is obtained. In the case of Bi = 0 and Ri = Gi = 1 (yellow), C = M = 0 and R = G = 1, resulting in pure yellow.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be displayed in color by RGCM, for example, by the following equation. However, Ri, Gi, Bi shall take the value of 0-1.
When Ri + Gi> 0 C0 = (2 + k) / (2 + 2k) × Bi × (Gi + k × Bi) / (Ri + Gi + k × Bi) Equation 2.1A
M0 = (2 + k) / (2 + 2k) × Bi × (Ri + k × Bi) / (Ri + Gi + k × Bi) Equation 2.2A
R0 = max (Ri−M0,0) Formula 2.3A
G0 = max (Gi−C0,0) Equation 2.4A
MIN = min (R0, G0, C0, M0) Equation 2.5A
MAX = max (R0, G0, C0, M0) Equation 2.6A
C = C0 × MIN / MAX + C0 Formula 2.7A
M = M0 × MIN / MAX + M0 Formula 2.8A
R = R0 × MIN / MAX + R0 Formula 2.9A
G = G0 × MIN / MAX + G0 Formula 2.10A
When Ri = Gi = 0 C = M = (2 + k) / (2 + 2k) × Bi Formula 2.11A
R = G = 0 Formula 2.12A
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value. K is a real number not less than 0 and not more than 1. If k = 0, equations 2.1A-2.12A match equations 2.1-2.12.

In Expression 2.1A to Expression 2.12A, R, G, C, and M are brighter by (MIN / MAX) than R0, G0, C0, and M0. For example, when Ri = Gi = Bi = 1 (white), R = G = C = M = 1, and light utilization efficiency = ((2/3) × 1 × 2 + (1/3) × 1 × 2) / 4 = 1/2. For example, when Ri = 1, Gi = Bi = 0 (red), R = 1, C = M = G = 0, and pure red is obtained. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, C = M = R = 0 and pure green is obtained. In the case of Bi = 1, Ri = Gi = 0 (blue), C = M = 1/2 and R = G = 0. For example, when Ri = 0 and Gi = Bi = 1 (cyan), C = (2 + k) / (2 + 2k) ≈1, M = (2 + k) k / (2 (1 + k) ² ) ≈0, R = 0, G = K / (2 + 2k) ≈0, and the color is close to vivid cyan. In the case of Gi = 0, Bi = Ri = 1 (magenta), C = (2 + k) k / (2 (1 + k) ² ) = 0, M = (2 + k) / (2 + 2k) ≈1, R = k / (2 + 2k ) ≈0, G = 0, so that the color is close to vivid magenta. In the case of Bi = 0 and Ri = Gi = 1 (yellow), C = M = 0 and R = G = 1, resulting in pure yellow.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be displayed in color by RGCM, for example, by the following equation. However, Ri, Gi, Bi shall take the value of 0-1.
When Ri + Gi ≧ Bi> 0 C0 = Bi × Gi / (Ri + Gi) Equation 2.1B
M0 = Bi × Ri / (Ri + Gi) Equation 2.2B
R0 = max (Ri−M0,0) Formula 2.3B
G0 = max (Gi−C0,0) Equation 2.4B
C1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × C0 Formula 2.5B
M1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × M0 Formula 2.6B
MIN = min (R0, G0, C1, M1) Equation 2.7B
MAX = max (R0, G0, C1, M1) Equation 2.8B
C = C1 × MIN / MAX + C1 Formula 2.9B
M = M1 × MIN / MAX + M1 Formula 2.10B
R = R0 × MIN / MAX + R0 Formula 2.11B
G = G0 × MIN / MAX + G0 Formula 2.12B
When Bi> Ri + Gi> 0 C0 = Bi × (Gi−Ri + Bi) / (Ri + Gi + Bi) Equation 2.13B
M0 = Bi × (Ri−Gi + Bi) / (Ri + Gi + Bi) Equation 2.14B
R0 = max (Ri−M0,0) Equation 2.15B
G0 = max (Gi−C0,0) Equation 2.16B
C1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × C0 Formula 2.17B
M1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × M0 Formula 2.18B
MIN = min (R0, G0, C1, M1) Equation 2.19B
MAX = max (R0, G0, C1, M1) Equation 2.20B
C = C1 × MIN / MAX + C1 Formula 2.21B
M = M1 × MIN / MAX + M1 Formula 2.22B
R = R0 × MIN / MAX + R0 Formula 2.23B
G = G0 × MIN / MAX + G0 Formula 2.24B
When Ri = Gi = 0 C = M = Bi / 4 Equation 2.25B
R = G = 0 Formula 2.26B
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value.

  In Formula 2.1B to Formula 2.26B, for example, when Ri = 1 and Gi = Bi = 0 (red), R = 1, C = M = G = 0, and pure red is obtained. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, C = M = R = 0 and pure green is obtained. In the case of Bi = 1, Ri = Gi = 0 (blue), C = M = 1/4 and R = G = 0. For example, when Ri = 0 and Gi = Bi = 1 (cyan), C = 1, M = R = G = 0, and vivid cyan. When Gi = 0 and Bi = Ri = 1 (magenta), M = 1 and C = R = G = 0, resulting in bright magenta. In the case of Bi = 0 and Ri = Gi = 1 (yellow), C = M = 0 and R = G = 1, resulting in pure yellow. For example, when Ri = Gi = Bi = 1 (white), R = G = C = M = 1, and the light utilization efficiency = ((2/3) × 1 × 2 + (1/3) × 1 X2) / 4 = 1/2.

  As shown in FIGS. 2A to 2I, when one pixel is GBMY, the light use efficiency in the color filter is 1/3 for GB and 2/3 for MY. Then, it becomes 1/2. Moreover, it turns white when all the lights are on. That is, the brightness is brighter than that of the RGB method or RGBC method. As shown in FIG. 2 (j), when one pixel is GBMY, the vicinity of pure R is slightly whitened, but the portions Y to G and B to M have better color purity than RGB and CMY. This is because vivid color filters having hues outside the RGB triangles can be used as M and Y. For example, chromaticity (x, y) is M (0.40) with respect to R (0.42, 0.29), G (0.30, 0.44), and B (0.20, 0.26). , 0.21) and Y (0.40, 0.49) are outside. In this case, display with better color purity can be achieved by displaying with M pixels or Y pixels than when displaying M with B pixels and R pixels or displaying Y with R pixels and G pixels. In the present invention, this display with M pixels and Y pixels is expressed as “brilliant M” and “brilliant Y”. Therefore, it is suitable for displaying a landscape photograph with many Y to G and B to M components. However, it is not limited to the use.

In order to display a color given by RGB data (Ri, Gi, Bi) in GBMY, for example, the following equation can be used. However, Ri, Gi, Bi shall take the value of 0-1.
When Gi + Bi> 0 M = Ri × Bi / (Gi + Bi) Equation 3.1
Y = Ri × Gi / (Gi + Bi) Equation 3.2
G = max (Gi−Y, 0) Equation 3.3
B = max (Bi−M, 0) Equation 3.4
When Gi = Bi = 0 M = Y = Ri / 2 Equation 3.5
G = B = 0 Formula 3.6
However, max (A, B) is a function which takes the largest value among A and B.

  In Formulas 3.1 to 3.6, when it is close to pure R, Gi-Y and Bi-M are negative, and G = B = 0. However, the other colors are kept as they are, and the normal image display is hardly affected. For example, when Ri = 1 and Gi = Bi = 0 (red), M = Y = 1/2 and G = B = 0. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, M = Y = B = 0, and pure green is obtained. When Bi = 1, Ri = Gi = 0 (blue), B = 1, M = Y = G = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), G = B = 1 and M = Y = 0, so that pure cyan is obtained. In the case of Gi = 0, Bi = Ri = 1 (magenta), M = 1 and G = B = Y = 0, and the color is close to vivid magenta. When Bi = 0 and Ri = Gi = 1 (yellow), Y = 1 and G = B = M = 0, and the color is close to vivid yellow. For example, when Ri = Gi = Bi = 1 (white), M = Y = G = B = 1/2, and the light use efficiency = ((2/3) × (1/2) × 2 + ( 1/3) × (1/2) × 2) / 4 = 1/4.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be color-displayed by GBMY using, for example, the following equation. However, Ri, Gi, Bi shall take the value of 0-1.
When Gi + Bi> 0 M = (2 + k) / (2 + 2k) × Ri × (Bi + k × Ri) / (Gi + Bi + k × Ri) Equation 3.1A
Y = (2 + k) / (2 + 2k) × Ri × (Gi + k × Ri) / (Gi + Bi + k × Ri) Equation 3.2A
G = max (Gi−Y, 0) Equation 3.3A
B = max (Bi−M, 0) Equation 3.4A
When Gi = Bi = 0 M = Y = (2 + k) / (2 + 2k) × Ri Equation 3.5A
G = B = 0 Formula 3.6A
However, max (A, B) is a function which takes the largest value among A and B. K is a real number not less than 0 and not more than 1. In the case of k = 0, the expressions 3.1A to 3.6A correspond to the expressions 3.1 to 3.6.

In Formula 3.1A to Formula 3.6A, when it is close to pure R, Gi-Y and Bi-M are negative, and G = B = 0. However, the other colors are kept almost as they are, and the normal image display is hardly affected. For example, when Ri = 1 and Gi = Bi = 0 (red), M = Y = 1/2 and G = B = 0. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, M = Y = B = 0, and pure green is obtained. When Bi = 1, Ri = Gi = 0 (blue), B = 1, M = Y = G = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), M = Y = 0 and G = B = 1, and pure cyan is obtained. In the case of Gi = 0, Bi = Ri = 1 (magenta), M = (2 + k) / (2 + 2k) ≈1, Y = (2 + k) k / (2 (1 + k) ² ) ≈0, G = 0, B = k / (2 + 2k) ≈0, so that the color is close to vivid magenta. When Bi = 0, Ri = Gi = 1 (yellow), M = (2 + k) k / (2 (1 + k) ² ) ≈0, Y = (2 + k) / (2 + 2k) ≈1, G = k / (2 + 2k) ) ≈0, B = 0, so that the color is close to vivid yellow. For example, when Ri = Gi = Bi = 1 (white), M = Y = G = B = 1/2, and the light use efficiency = ((2/3) × (1/2) × 2 + ( 1/3) × (1/2) × 2) / 4 = 1/4.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be color-displayed by GBMY using, for example, the following equation. However, Ri, Gi, Bi shall take the value of 0-1.
When Gi + Bi> 0 M0 = Ri × Bi / (Gi + Bi) Equation 4.1
Y0 = Ri × Gi / (Gi + Bi) Equation 4.2
G0 = max (Gi−Y0,0) Equation 4.3
B0 = max (Bi−M0,0) Equation 4.4
MIN = min (G0, B0, M0, Y0) Equation 4.5
MAX = max (G0, B0, M0, Y0) Equation 4.6
M = M0 × MIN / MAX + M0 Formula 4.7
Y = Y0 × MIN / MAX + Y0 Formula 4.8
G = G0 × MIN / MAX + G0 Formula 4.9
B = B0 × MIN / MAX + B0 Formula 4.10
When Gi = Bi = 0 M = Y = Ri / 2 Equation 4.11
G = B = 0 Equation 4.12.
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value.

  In Expressions 4.1 to 4.12, G, B, M, and Y are brighter by (MIN / MAX) than G0, B0, M0, and Y0. For example, when Ri = Gi = Bi = 1 (white), G = B = M = Y = 1, and light utilization efficiency = ((2/3) × 1 × 2 + (1/3) × 1 × 2) / 4 = 1/2. For example, when Ri = 1 and Gi = Bi = 0 (red), M = Y = 1/2 and G = B = 0. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, M = Y = B = 0, and pure green is obtained. When Bi = 1, Ri = Gi = 0 (blue), B = 1, M = Y = G = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), M = Y = 0 and G = B = 1, and pure cyan is obtained. When Gi = 0 and Bi = Ri = 1 (magenta), M = 1, Y = G = B = 0, and vivid magenta is obtained. In the case of Bi = 0 and Ri = Gi = 1 (yellow), Y = 1, M = G = B = 0, and the color is bright yellow.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be color-displayed by GBMY using, for example, the following equation. However, Ri, Gi, Bi shall take the value of 0-1.
When Gi + Bi> 0 M0 = (2 + k) / (2 + 2k) × Ri × (Bi + k × Ri) / (Gi + Bi + k × Ri) Equation 4.1A
Y0 = (2 + k) / (2 + 2k) × Ri × (Gi + k × Ri) / (Gi + Bi + k × Ri) Equation 4.2A
G0 = max (Gi−Y0,0) Equation 4.3A
B0 = max (Bi−M0,0) Equation 4.4A
MIN = min (G0, B0, M0, Y0) Equation 4.5A
MAX = max (G0, B0, M0, Y0) Equation 4.6A
M = M0 × MIN / MAX + M0 Formula 4.7A
Y = Y0 × MIN / MAX + Y0 Formula 4.8A
G = G0 × MIN / MAX + G0 Formula 4.9A
B = B0 × MIN / MAX + B0 Formula 4.10A
When Gi = Bi = 0 M = Y = (2 + k) / (2 + 2k) × Ri 4.11A
G = B = 0 Formula 4.12A
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value. K is a real number not less than 0 and not more than 1. In the case of k = 0, the expressions 4.1A to 4.12A match the expressions 4.1 to 4.12.

In Expressions 4.1A to 4.12A, G, B, M, and Y are brighter by (MIN / MAX) than G0, B0, M0, and Y0. For example, when Ri = Gi = Bi = 1 (white), G = B = M = Y = 1, and light utilization efficiency = ((2/3) × 1 × 2 + (1/3) × 1 × 2) / 4 = 1/2. For example, when Ri = 1 and Gi = Bi = 0 (red), M = Y = 1/2 and G = B = 0. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, M = Y = B = 0, and pure green is obtained. When Bi = 1, Ri = Gi = 0 (blue), B = 1, M = Y = G = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), M = Y = 0 and G = B = 1, and pure cyan is obtained. In the case of Gi = 0, Bi = Ri = 1 (magenta), M = (2 + k) / (2 + 2k) ≈1, Y = (2 + k) k / (2 (1 + k) ² ) ≈0, G = 0, B = k / (2 + 2k) ≈0, so that the color is close to vivid magenta. When Bi = 0, Ri = Gi = 1 (yellow), M = (2 + k) k / (2 (1 + k) ² ) ≈0, Y = (2 + k) / (2 + 2k) ≈1, G = k / (2 + 2k) ) ≈0, B = 0, so that the color is close to vivid yellow.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be color-displayed by GBMY using, for example, the following equation. However, Ri, Gi, Bi shall take the value of 0-1.
When Gi + Bi ≧ Ri> 0 M0 = Ri × Bi / (Gi + Bi) Equation 4.1B
Y0 = Ri × Gi / (Gi + Bi) Equation 4.2B
G0 = max (Gi−Y0,0) Equation 4.3B
B0 = max (Bi−M0,0) Equation 4.4B
M1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × M0 Formula 4.5B
Y1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × Y0 Formula 4.6B
MIN = min (G0, B0, M1, Y1) Expression 4.7B
MAX = max (G0, B0, M1, Y1) Equation 4.8B
M = M1 × MIN / MAX + M1 Formula 4.9B
Y = Y1 × MIN / MAX + Y1 Formula 4.10B
G = G0 × MIN / MAX + G0 Formula 4.11B
B = B0 × MIN / MAX + B0 Formula 4.12B
When Bi> Ri + Gi> 0 M0 = Ri × (Bi−Gi + Ri) / (Ri + Gi + Bi) Equation 4.13B
Y0 = Ri × (Gi−Bi + Ri) / (Ri + Gi + Bi) Equation 4.14B
G0 = max (Gi−Y0,0) Equation 4.15B
B0 = max (Bi−M0,0) Equation 4.16B
M1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × M0 Equation 4.17B
Y1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × Y0 Equation 4.18B
MIN = min (G0, B0, M1, Y1) Equation 4.19B
MAX = max (G0, B0, M1, Y1) Equation 4.20B
M = M1 × MIN / MAX + M1 Formula 4.21B
Y = Y1 × MIN / MAX + Y1 Formula 4.22B
G = G0 × MIN / MAX + G0 Formula 4.23B
B = B0 × MIN / MAX + B0 Equation 4.24B
When Gi = Bi = 0 M = Y = Ri / 4 Equation 4.25B
G = B = 0 Equation 4.26B
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value.

  In Expression 4.1B to Expression 4.26B, for example, when Ri = 1 and Gi = Bi = 0 (red), M = Y = 1/4 and G = B = 0. In the case of Gi = 1, Bi = Ri = 0 (green), G = 1, M = Y = B = 0, and pure green is obtained. When Bi = 1, Ri = Gi = 0 (blue), B = 1, M = Y = G = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), M = Y = 0 and G = B = 1, and pure cyan is obtained. When Gi = 0 and Bi = Ri = 1 (magenta), M = 1, Y = G = B = 0, and vivid magenta is obtained. In the case of Bi = 0 and Ri = Gi = 1 (yellow), Y = 1 and M = G = B = 0, resulting in bright yellow. For example, when Ri = Gi = Bi = 1 (white), G = B = M = Y = 1, and the light utilization efficiency = ((2/3) × 1 × 2 + (1/3) × 1. X2) / 4 = 1/2.

  As shown in FIGS. 3A to 3I, when one pixel is BRYC, the use efficiency of light in the color filter is 1/3 for BR and 2/3 for YC. The overall average is ½. Moreover, it turns white when all the lights are on. That is, the brightness is brighter than that of the RGB method or RGBC method. As shown in FIG. 3J, when one pixel is BRYC, the vicinity of pure G is slightly whitened, but the portions C to B and R to Y have better color purity than RGB and CMY. This is because vivid color filters having hues outside the RGB triangles can be used as M and Y. For example, the chromaticity (x, y) is Y (0.40) relative to R (0.42, 0.29), G (0.30, 0.44), and B (0.20, 0.26). , 0.49) and C (0.17, 0.31) are on the outside. In this case, a display with better color purity can be achieved by displaying with Y pixels or C pixels than when displaying Y with R pixels and G pixels or displaying C with G pixels and B pixels. In the present invention, this display with Y and C pixels is expressed as “brilliant Y” and “brilliant C”. Therefore, it is suitable, for example, when displaying a photograph of a human (face) with many R to Y components. However, it is not limited to the use.

In order to display a color given by RGB data (Ri, Gi, Bi) in BRYC, for example, the following equation can be used. However, Ri, Gi, Bi shall take the value of 0-1.
When Bi + Ri> 0 Y = Gi × Ri / (Bi + Ri) Equation 5.1
C = Gi × Bi / (Bi + Ri) Equation 5.2
B = max (Bi−C, 0) Equation 5.3
R = max (Ri−Y, 0) Equation 5.4
When Bi = Ri = 0 Y = C = Gi / 2 Equation 5.5
B = R = 0 Formula 5.6
However, max (A, B) is a function which takes the largest value among A and B.

  In Formulas 5.1 to 5.6, Bi-C and Ri-Y are negative when B is close to pure G, and B = R = 0. However, the other colors are kept as they are, and the normal image display is hardly affected. For example, when Ri = 1 and Gi = Bi = 0 (red), M = Y = 1/2, G = R = 0, and pure red. When Gi = 1 and Bi = Ri = 0 (green), Y = C = 1/2 and G = B = 0. When Bi = 1, Ri = Gi = 0 (blue), B = 1, Y = C = R = 0, and pure blue is obtained. When Ri = 0 and Gi = Bi = 1 (cyan), C = 1, B = R = Y = 0, and vivid cyan. When Gi = 0 and Bi = Ri = 1 (magenta), Y = C = 0 and B = R = 1, and pure magenta is obtained. In the case of Bi = 0 and Ri = Gi = 1 (yellow), Y = 1 and C = B = R = 0, resulting in bright yellow. For example, when Ri = Gi = Bi = 1 (white), Y = C = B = R = 1/2, and the light use efficiency = ((2/3) × (1/2) × 2 + ( 1/3) × (1/2) × 2) / 4 = 1/4.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be displayed by BRYC in the following formula, for example. However, Ri, Gi, Bi shall take the value of 0-1.
When Bi + Ri> 0 Y = (2 + k) / (2 + 2k) × Gi × (Ri + k × Gi) / (Bi + Ri + k × Gi) Formula 5.1A
C = (2 + k) / (2 + 2k) × Gi × (Bi + k × Gi) / (Bi + Ri + k × Gi) Equation 5.2A
B = max (Bi−C, 0) Equation 5.3A
R = max (Ri−Y, 0) Formula 5.4A
In the case of Bi = Ri = 0 Y = C = (2 + k) / (2 + 2k) × Gi 5.5A
B = R = 0 Formula 5.6A
However, max (A, B) is a function which takes the largest value among A and B. K is a real number not less than 0 and not more than 1. In the case of k = 0, the expressions 5.1A to 5.6A correspond to the expressions 5.1 to 5.6.

In Formula 5.1A to Formula 5.6A, when it is close to pure G, Bi-C and Ri-Y are negative, and B = R = 0. However, the other colors are kept almost as they are, and the normal image display is hardly affected. For example, when Ri = 1, Gi = Bi = 0 (red), R = 1, Y = C = B = 0 and pure red is obtained. When Gi = 1 and Bi = Ri = 0 (green), Y = C = 1/2 and B = R = 0. When Bi = 1, Ri = Gi = 0 (blue), B = 1, Y = C = R = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), Y = (2 + k) k / (2 (1 + k) ² ) ≈0, C = (2 + k) / (2 + 2k) ≈1, B = k / ( 2 + 2k) ≈0 and R = 0, and the color is close to vivid cyan. When Gi = 0 and Bi = Ri = 1 (magenta), Y = C = 0 and B = R = 1, and pure magenta is obtained. If Bi = 0, Ri = Gi = 1 (yellow), Y = (2 + k) / (2 + 2k) ≈1, C = (2 + k) k / (2 (1 + k) ² ) ≈0, B = 0, R = k / (2 + 2k) ≈0, so that the color is close to bright yellow. For example, when Ri = Gi = Bi = 1 (white), Y = C = B = R = 1/2, and the light use efficiency = ((2/3) × (1/2) × 2 + ( 1/3) × (1/2) × 2) / 4 = 1/4.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be displayed by BRYC in the following formula, for example. However, Ri, Gi, Bi shall take the value of 0-1.
When Bi + Ri> 0 Y0 = Gi × Ri / (Bi + Ri) Equation 6.1
C0 = Gi × Bi / (Bi + Ri) Equation 6.2
B0 = max (Bi−C0,0) Equation 6.3
R0 = max (Ri−Y0,0) Equation 6.4
MIN = min (B0, R0, Y0, C0) Equation 6.5
MAX = max (B0, R0, Y0, C0) Equation 6.6
Y = Y0 × MIN / MAX + Y0 Formula 6.7
C = C0 × MIN / MAX + C0 Equation 6.8
B = B0 × MIN / MAX + B0 Formula 6.9
R = R0 × MIN / MAX + R0 Formula 6.10
When Bi = Ri = 0 Y = C = Gi / 2 Equation 6.11
B = R = 0 Equation 6.12
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value.

  In Expression 6.1 to Expression 6.12, B, R, Y, and C are brighter by (MIN / MAX) than B0, R0, Y0, and C0. For example, in the case of Ri = Gi = Bi = 1 (white), B = R = Y = C = 1, and the light use efficiency = ((2/3) × 1 × 2 + (1/3) × 1 × 2) / 4 = 1/2. For example, when Ri = 1 and Gi = Bi = 0 (red), R = 1, Y = C = B = 0, and pure red is obtained. When Gi = 1 and Bi = Ri = 0 (green), Y = C = 1/2 and B = R = 0. When Bi = 1, Ri = Gi = 0 (blue), B = 1, Y = C = R = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), C = 1, Y = B = R = 0, and vivid cyan. When Gi = 0 and Bi = Ri = 1 (magenta), Y = C = 0 and B = R = 1, and pure magenta is obtained. In the case of Bi = 0 and Ri = Gi = 1 (yellow), M = 1 and C = B = R = 0, resulting in bright yellow.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be displayed by BRYC in the following formula, for example. However, Ri, Gi, Bi shall take the value of 0-1.
When Bi + Ri> 0 Y0 = (2 + k) / (2 + 2k) × Gi × (Ri + k × Gi) / (Bi + Ri + k × Gi) Equation 6.1A
C0 = (2 + k) / (2 + 2k) × Gi × (Bi + k × Gi) / (Bi + Ri + k × Gi) Equation 6.2A
B0 = max (Bi−C0,0) Equation 6.3A
R0 = max (Ri−Y0,0) Equation 6.4A
MIN = min (B0, R0, Y0, C0) Equation 6.5A
MAX = max (B0, R0, Y0, C0) Equation 6.6A
Y = Y0 × MIN / MAX + Y0 Formula 6.7A
C = C0 × MIN / MAX + C0 Formula 6.8A
B = B0 × MIN / MAX + B0 Formula 6.9A
R = R0 × MIN / MAX + R0 Formula 6.10A
When Bi = Ri = 0 Y = C = (2 + k) / (2 + 2k) × Gi Equation 6.11A
B = R = 0 Formula 6.12A
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value. K is a real number not less than 0 and not more than 1. For k = 0, equations 6.1A-6.12A match equations 6.1-6.12.

In Expression 6.1A to Expression 6.12A, B, R, Y, and C are brighter by (MIN / MAX) than B0, R0, Y0, and C0. For example, in the case of Ri = Gi = Bi = 1 (white), B = R = Y = C = 1, and the light use efficiency = ((2/3) × 1 × 2 + (1/3) × 1 × 2) / 4 = 1/2. For example, when Ri = 1 and Gi = Bi = 0 (red), R = 1, Y = C = B = 0, and pure red is obtained. When Gi = 1 and Bi = Ri = 0 (green), Y = C = 1/2 and B = R = 0. When Bi = 1, Ri = Gi = 0 (blue), B = 1, Y = C = R = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), Y = (2 + k) k / (2 (1 + k) ² ) ≈0, C = (2 + k) / (2 + 2k) ≈1, B = k / ( 2 + 2k) ≈0 and R = 0, and the color is close to vivid cyan. When Gi = 0 and Bi = Ri = 1 (magenta), Y = C = 0 and B = R = 1, and pure magenta is obtained. If Bi = 0, Ri = Gi = 1 (yellow), Y = (2 + k) / (2 + 2k) ≈1, C = (2 + k) k / (2 (1 + k) ² ) ≈0, B = 0, R = k / (2 + 2k) ≈0, so that the color is close to bright yellow.

Alternatively, the color given by RGB data (Ri, Gi, Bi) can be displayed by BRYC in the following formula, for example. However, Ri, Gi, Bi shall take the value of 0-1.
When Bi + Ri ≧ Gi> 0, Y0 = Gi × Ri / (Bi + Ri) Equation 6.1B
C0 = Gi × Bi / (Bi + Ri) Equation 6.2B
B0 = max (Bi−C0,0) Equation 6.3B
R0 = max (Ri−Y0,0) Equation 6.4B
Y1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × Y0 Formula 6.5B
C1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × C0 Formula 6.6B
MIN = min (B0, R0, Y1, C1) Equation 6.7B
MAX = max (B0, R0, Y1, C1) Equation 6.8B
Y = Y1 × MIN / MAX + Y1 Formula 6.9B
C = C1 × MIN / MAX + C1 Formula 6.10B
B = B0 × MIN / MAX + B0 Formula 6.11B
R = R0 × MIN / MAX + R0 Formula 6.12B
When Gi> Bi + Ri> 0 Y0 = Gi × (Ri−Bi + Gi) / (Ri + Gi + Bi) Equation 6.13B
C0 = Gi × (Bi−Ri + Gi) / (Ri + Gi + Bi) Equation 6.14B
B0 = max (Bi−C0,0) Equation 6.15B
R0 = max (Ri−Y0,0) Equation 6.16B
Y1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × Y0 Equation 6.17B
C1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × C0 Equation 6.18B
MIN = min (B0, R0, Y1, C1) Equation 6.19B
MAX = max (B0, R0, Y1, C1) Equation 6.20B
Y = Y1 × MIN / MAX + Y1 Formula 6.21B
C = C1 × MIN / MAX + C1 Formula 6.22B
B = B0 × MIN / MAX + B0 Equation 6.23B
R = R0 × MIN / MAX + R0 Formula 6.24B
When Bi = Ri = 0 Y = C = Bi / 4 Equation 6.25B
B = R = 0 Equation 6.26B
However, max (A, B,...) Is a function having the largest value among A, B,..., And min (A, B,...) Is A, B,.・ It is the function that takes the smallest value.

  In Expression 6.1B to Expression 6.26B, for example, when Ri = 1 and Gi = Bi = 0 (red), R = 1, Y = C = B = 0, and pure red is obtained. When Gi = 1 and Bi = Ri = 0 (green), Y = C = 1/4 and B = R = 0. When Bi = 1, Ri = Gi = 0 (blue), B = 1, Y = C = R = 0, and pure blue is obtained. For example, when Ri = 0 and Gi = Bi = 1 (cyan), C = 1 and Y = B = R = 0, resulting in bright cyan. When Gi = 0 and Bi = Ri = 1 (magenta), Y = C = 0 and B = R = 1, and pure magenta is obtained. In the case of Bi = 0 and Ri = Gi = 1 (yellow), Y = 1 and C = B = R = 0, resulting in bright yellow. For example, when Ri = Gi = Bi = 1 (white), B = R = Y = C = 1, and the light utilization efficiency = ((2/3) × 1 × 2 + (1/3) × 1 X2) / 4 = 1/2.

  As color data conversion (data conversion means), there are a method of conversion from digital data by calculation, a method using a lookup table, a method of electrical conversion from an analog signal, and the like. Any method may be used. Normally, in driving, gamma conversion for correcting the characteristics of the display medium and the display panel unit is performed. In addition, when gamma correction is applied to color data, data conversion is performed after performing reverse gamma conversion on Ri, Gi, Bi, and driving is performed by performing gamma conversion on each color data of RGCM, GBMY, BRYR. Good. In addition, even if correction is applied to the color data, it is possible to omit the inverse gamma conversion and gamma conversion (ignoring errors), or to convert with an approximate expression that combines inverse gamma conversion, data conversion, and gamma conversion. It is.

  Next, the image display device 50 according to the embodiment of the present invention will be described. Examples of the image display device 50 include electronic paper shown in FIGS. 4A and 4B, and a liquid crystal display shown in FIGS. 5A, 5B, 6A, and 6B. Examples thereof include an apparatus.

  As shown in FIGS. 4A and 4B, the electronic paper according to the embodiment of the present invention is a reflective display device. As shown in FIG. 4A, the electronic paper according to the embodiment of the present invention includes a substrate 1, a thin film transistor array 20, an electrophoretic body 30, a counter electrode 31, a color filter 11, and a counter substrate 32. In the electronic paper according to the embodiment of the present invention, electrophoresis is performed when the thin film transistor array 20 formed on the substrate 1 is bonded to the one formed with the color filter 11 and the counter electrode 31 on another counter substrate 32. It can be produced by sandwiching the body 30. Alternatively, the thin film transistor array 20 can be formed on the substrate 1 by attaching the color filter 11 and the counter electrode 31 on another counter substrate 32. The image is displayed on the counter substrate 32 side. As the electrophoretic body 30, an electrophoretic capsule, an electronic powder fluid, or the like can be used. The electrophoretic body 30 may be confined by forming a wall for each subpixel. In this method, it is necessary to precisely position the color filter 11 and the thin film transistor array 20 when the counter substrate 32 is bonded. Alternatively, as illustrated in FIG. 4B, the electronic paper according to the embodiment of the present invention includes a substrate 1, a color filter 11, a thin film transistor array 20, an electrophoretic body 30, a counter electrode 31, and a counter substrate 32. Yes. Alternatively, the color filter 11 is formed on the substrate 1, the thin film transistor array 20 is formed thereon, and the counter electrode 31 and the electrophoretic body 30 are formed on another counter substrate 32. it can. In the electronic paper according to the embodiment of the present invention, the color filter 11 is formed on the substrate 1, the thin film transistor array 20 is formed on the color filter 11, and the counter electrode 31 is formed on another counter substrate 32. It can be produced by sandwiching the electrophoretic body 30. The image is displayed on the substrate 1 side. In the case of the electronic paper shown in FIG. 4B, since the alignment of the color filter 11 and the thin film transistor array 20 has already been completed in the manufacturing process, precise alignment is not necessary when the counter substrate 32 is bonded.

  There are transmissive, reflective, and transflective liquid crystal display devices, but the liquid crystal display device according to the embodiment of the present invention is intended to use light effectively. Is suitable. As shown in FIG. 5A, the reflective liquid crystal display device according to the embodiment of the present invention includes a substrate 1, a thin film transistor array (electrode is a reflective electrode) 20, a liquid crystal layer 33, a counter electrode 31, a color filter 11, A counter substrate 32, a quarter wavelength plate 34, and a polarizing plate 35 are provided. The image is displayed on the polarizing plate 35 side. Alternatively, as shown in FIG. 5B, the reflective liquid crystal display device according to the embodiment of the present invention includes a counter substrate 32, a reflective counter electrode 31, a liquid crystal layer 33, a thin film transistor array 20, a color filter 11, and a substrate. 1 and a quarter-wave plate 34 and a polarizing plate 35 are provided. The image is displayed on the polarizing plate 35 side. Further, a seal portion 36 is used to enclose the liquid crystal. Here, the quarter-wave plate 34 is used to make the wavelength phase difference 90 degrees (π / 2), and is formed from a stretched film such as polycarbonate, polyvinyl alcohol, polyarylate, polysulfone, cycloolefin, or the like. Is done. The polarizing plate 35 is formed by transmitting only linearly polarized light in one direction and adsorbing iodine to a polyvinyl alcohol film, for example. Although not shown, an alignment film for aligning the liquid crystal or photo-alignment is used, and a spacer is used to make the gap constant.

  As shown in FIG. 6A, the transflective liquid crystal display device according to the embodiment of the present invention includes a backlight 39, a second polarizing plate 38, a second quarter-wave plate 37, a substrate 1, A thin film transistor array 20, a liquid crystal layer 33, a counter electrode 31, a color filter 11, a counter substrate 32, a quarter wavelength plate 34, and a first polarizing plate 35 are provided. An image is displayed on the first polarizing plate 35 side. Alternatively, as shown in FIG. 6B, the reflective liquid crystal display device according to the embodiment of the present invention includes a backlight 39, a second polarizing plate 38, a second quarter-wave plate 37, and a counter substrate. 32, a counter electrode 31, a liquid crystal layer 33, a thin film transistor array 20, a color filter 11, a substrate 1, a first quarter wavelength plate 34, and a first polarizing plate 35. An image is displayed on the first polarizing plate 35 side. Further, a seal portion 36 is used to enclose the liquid crystal. Here, the first and second quarter wave plates 34 and 37 are used for setting the phase difference of the wavelength to 90 degrees (π / 2). For example, polycarbonate, polyvinyl alcohol, polyarylate, polysulfone, It is formed from a stretched film such as cycloolefin. The first and second polarizing plates 35 and 38 are formed by transmitting only linearly polarized light in one direction and adsorbing iodine to, for example, a polyvinyl alcohol film. Although not shown, an alignment film for aligning the liquid crystal or photo-alignment is used, and a spacer is used to make the gap constant.

  Hereinafter, the configuration of the electronic paper and the liquid crystal display device according to the embodiment of the present invention will be described in detail.

  As a material of the substrate 1 and the counter substrate 32 according to the present embodiment, for example, glass is optimal, but plastic can also be used. Examples of plastics include polymethyl methacrylate, polyacrylate, polycarbonate, polystyrene, polyethylene sulfide, polyethersulfone, polyolefin, polyethylene terephthalate, polyethylene naphthalate, cycloolefin polymer, polyethersulfone, triacetylcellulose, and polyvinyl fluoride film. , Ethylene-tetrafluoroethylene copolymer resin, weather resistant polyethylene terephthalate, weather resistant polypropylene, glass fiber reinforced acrylic resin film, glass fiber reinforced polycarbonate, transparent polyimide, fluorine resin, cyclic polyolefin resin, etc. can also be used. However, the present invention is not limited to these. These may be used as the single substrate 1 and the counter substrate 32, but can also be used as the composite substrate 1 and the counter substrate 32 in which two or more kinds are stacked.

  Examples of the color filter 11 according to the present embodiment include those using dyes, those using pigments, and those using interference, and are formed by exposure and development using a resist in which pigments are dispersed. The method is preferably used. The light transmittance of the color filter 11 can be adjusted by adjusting the film thickness or the pigment concentration of the color filter 11. When one pixel is RGCM, red 11R, green 11G, cyan 11C, and magenta 11M are sequentially formed by coating, exposure, and development. The formation order is arbitrary. When one pixel is GBMY, green 11G, blue 11B, magenta 11M, and yellow 11Y are sequentially formed by coating, exposure, and development. The formation order is arbitrary. When one pixel is BRYC, blue 11B, red 11R, yellow 11Y, and cyan 11C are sequentially formed by coating, exposure, and development. The formation order is arbitrary. Furthermore, the step can be reduced by forming the transparent overcoat 11OC.

In order to improve the durability of the thin film transistor array 20, a transparent gas barrier layer (not shown) can be formed between the substrate 1 and the color filter 11 or between the color filter 11 and the thin film transistor array 20. Examples of the gas barrier layer include aluminum oxide (Al ₂ O ₃ ), silicon oxide (SiO ₂ ), silicon nitride (SiN), silicon oxynitride (SiON), silicon carbide (SiC), and diamond-like carbon (DLC). The present invention is not limited to these. These gas barrier layers can also be used by laminating two or more layers. The gas barrier layer may be formed only on one side of the substrate 1 using an organic film, or may be formed on both sides. The gas barrier layer can be formed using a vacuum deposition method, an ion plating method, a sputtering method, a laser ablation method, a plasma CVD (Chemical Vapor Deposition) method, a hot wire CVD method, a sol-gel method, and the like. It is not limited.

  Next, the thin film transistor array 20 according to the present embodiment will be described. In the thin film transistor array 20 according to the present embodiment, substantially transparent materials are used as electrodes, semiconductor layers, and insulating films. Here, “substantially transparent” means that the transmittance is 70% or more within a wavelength range of 400 nm to 700 nm that is visible light.

The electrode of the substantially transparent thin film transistor 20 according to the present embodiment, that is, the gate electrode 2, the gate wiring 2 ′, the capacitor electrode 9, the capacitor wiring 9 ′, the source electrode 4, the source wiring 4 ′, the drain electrode 5, and the pixel electrode For the upper pixel electrode 10, it is preferable to use a substantially transparent conductive material thin film. As the substantially transparent conductive material, indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), zinc oxide (ZnO), cadmium oxide (CdO), indium cadmium oxide (CdIn ₂ O ₄ ), cadmium oxide Although oxide materials such as tin (Cd ₂ SnO ₄ ) and zinc oxide tin (Zn ₂ SnO ₄ ) can be used, the present invention is not limited thereto. In addition, those oxide materials doped with impurities are also preferably used. For example, indium oxide doped with tin (Sn), molybdenum (Mo), titanium (Ti), tungsten (W), gallium (Ga), cerium (Ce) and zinc (Zn), zinc oxide with aluminum (Al ) Or gallium (Ga). Among them, indium tin oxide doped with tin in indium oxide (common name: “ITO”) and indium zinc oxide doped with zinc in indium oxide (common name: “IZO”) are particularly in terms of transparency and resistivity. Can be used particularly preferably.

  Alternatively, auxiliary wiring (not shown) can be provided in contact with the substantially transparent conductive material. As the auxiliary wiring, for example, gold (Au), silver (Ag), copper (Cu), cobalt (Co), tantalum (Ta), molybdenum (Mo), chromium (Cr), aluminum (Al), nickel (Ni) ), Tungsten (W), platinum (Pt) and titanium (Ti) can be used, but the present invention is not limited thereto. In addition, alloys of these metals, those doped with impurities, and those obtained by laminating a plurality of thin films of these metals can also be used. In order not to reduce the aperture ratio of the image display device 30, it is desirable that the auxiliary wiring be patterned to be thinner than an electrode using a substantially transparent conductive material. By thinly patterning, the thin film transistor array 20 can be made substantially transparent even if the auxiliary wiring is not transparent.

  Substantially transparent conductive material thin film and auxiliary wiring can be formed by vacuum deposition, ion plating, sputtering, laser ablation, plasma CVD, photo CVD, hot wire CVD, etc. However, the present invention is not limited to these.

As the substantially transparent semiconductor layer 6, an oxide semiconductor material containing a metal oxide as a main component can be used. The oxide semiconductor material is zinc oxide which is an oxide containing one or more elements of zinc (Zn), indium (In), tin (Sn), tungsten (W), magnesium (Mg), and gallium (Ga). (ZnO), indium oxide (In ₂ O ₃ ), indium zinc oxide (In—Zn—O), tin oxide (SnO ₂ ), tungsten oxide (WO), and zinc gallium indium oxide (In—Ga—Zn—O) However, the present invention is not limited to these materials. These materials are substantially transparent and preferably have a band gap of 2.8 eV or more, and preferably a band gap of 3.2 eV or more. The structure of these materials may be any of single crystal, polycrystal, microcrystal, mixed crystal of crystal and amorphous, nanocrystal scattered amorphous, and amorphous. The film thickness of the substantially transparent semiconductor layer 6 is desirably 20 nm or more.

  Since the material of the oxide semiconductor used for the substantially transparent semiconductor layer 6 does not have photosensitivity in the visible light region, a substantially transparent thin film transistor array 20 can be manufactured, and the aperture ratio of the active matrix display device And a new display device configuration can be realized.

  The substantially transparent semiconductor layer 6 can be formed by sputtering, pulse laser deposition, vacuum deposition, CVD, MBE (Molecular Beam Epitaxy), ALD (Atomic Layer Deposition), and sol-gel. Preferably, a sputtering method, a pulse laser deposition method, a vacuum evaporation method, or a CVD method is used. Examples of the sputtering method include RF magnetron sputtering method and DC sputtering method, vacuum evaporation method includes resistance heating evaporation method, electron beam evaporation method and ion plating method, CVD method includes hot wire CVD method and plasma CVD method. It is not limited to these.

The material used for the gate insulating film 3 of the substantially transparent thin film transistor array 20 according to the embodiment of the present invention is not particularly limited, but silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, tantalum oxide (Ta _2). Inorganic materials such as O ₅ ), yttrium oxide (Y ₂ O ₃ ), hafnium oxide (HfO ₂ ), hafnium aluminate (HfAlO), zirconium oxide (ZrO ₂ ) and titanium oxide (TiO ₂ ), or polymethyl methacrylate ( Examples thereof include organic materials such as polyacrylates such as PMMA), polyvinyl alcohol (PVA), polystyrene (PS), transparent polyimide, polyester, epoxy resin, and polyvinylphenol, but the present invention is not limited thereto. In order to suppress the gate leakage current, it is preferable that the resistivity of the insulating material is 10 ¹¹ Ω · cm or more, desirably 10 ¹⁴ Ω · cm or more. The gate insulating layer 3 is formed using a method such as vacuum deposition, ion plating, sputtering, laser ablation, plasma CVD, photo CVD, hot wire CVD, spin coating, dip coating, or screen printing. However, the present invention is not limited to these. The film thickness of the gate insulating layer 3 is preferably 50 nm or more and 2 μm or less. These gate insulating films 3 may be used as a single layer, may be a laminate of a plurality of layers, or may have a composition inclined in the growth direction.

  Although the configuration of the substantially transparent thin film transistor array 20 according to the embodiment of the present invention is not particularly limited, a bottom gate top contact type, a bottom gate bottom contact type, a top gate top contact type, and a top gate bottom contact type are used. Can do.

  The interlayer insulating film 8 according to the present embodiment is not particularly limited as long as it is insulating and substantially transparent. For example, inorganic materials such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, tantalum oxide, yttrium oxide, hafnium oxide, hafnium aluminate, zirconium oxide and titanium oxide, or polyacrylate such as polymethyl methacrylate (PMMA) , Organic materials such as polyvinyl alcohol (PVA), polystyrene (PS), transparent polyimide, polyester, epoxy resin, and polyvinylphenol, but are not limited to these in the present invention. The interlayer insulating film 8 may be the same material as the gate insulating film 4 or a different material. These interlayer insulating films 8 may be used as a single layer or may be a laminate of a plurality of layers. The interlayer insulating film 8 is formed so as to cover at least the source wiring 4 ′ and the gate wiring 2 ′ in order to reduce the influence on the display.

  When the structure of the substantially transparent thin film transistor array 20 according to the present embodiment is a bottom gate type, a sealing layer (not shown) that covers the substantially transparent semiconductor layer 6 may be provided. it can. By using the sealing layer, it is possible to prevent the substantially transparent semiconductor layer 6 from being changed with time due to humidity or the like or from being affected by the interlayer insulating film 8. As the sealing layer, inorganic materials such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, tantalum oxide, yttrium oxide, hafnium oxide, hafnium aluminate, zirconium oxide and titanium oxide, or polymethyl methacrylate (PMMA) Organic materials such as polyacrylate, polyvinyl alcohol (PVA), polystyrene (PS), transparent polyimide, polyester, epoxy resin, polyvinyl phenol and fluorine-based resin are not limited to these. These sealing layers may be used as a single layer, or a laminate of a plurality of layers may be used.

  Furthermore, in the embodiment of the present invention, the upper pixel electrode 10 electrically connected to the pixel electrode 5 ′ may be provided. Specifically, the interlayer insulating film 8 is pattern printed by a method such as a screen printing method, and the interlayer insulating film 8 is not provided on the pixel electrode 5 ′, or a transparent resist is applied, exposed and developed to form a pixel. If formed on the electrode 5 'on the interlayer insulating film 8 having a hole, it can be connected to the pixel electrode 5'.

  The substantially transparent thin film transistor array 20 is optimal for the image display apparatus as shown in FIGS. 4B, 5B, and 6B, but is not limited to FIGS. 4A and 5A. Of course, it can also be used in an image display apparatus as shown in FIG.

  Examples 1 to 5 according to embodiments of the present invention will be described below. The present invention is not limited to the first to fifth embodiments.

  First, a glass substrate was used as the substrate 1 as shown in FIG. Next, resists of red 11R, green 11G, cyan 11C and magenta 11M were applied, exposed, developed and baked on the substrate 1 to form a pattern. Here, the arrangement of the color filters 11 of red 11R, green 11G, cyan 11C, and magenta 11M is shown in FIGS. Next, an overcoat layer 11OC was formed by applying and baking a transparent overcoat agent on the entire surface.

  Next, as shown in FIG. 7B, an ITO film is formed on the overcoat layer 11OC by a sputtering method and patterned by photolithography and wet etching to form a gate electrode 2, a gate wiring 2 ′, a capacitor electrode 9 and the like. The capacitor wiring 9 ′ was formed.

  Next, as shown in FIG. 7C, the gate insulating film 3 and the semiconductor layer 6 are continuously formed by sputtering so as to cover the gate electrode 2, the gate wiring 2 ′, the capacitor electrode 9, and the capacitor wiring 9 ′. did. The gate insulating film 3 was made of SiON, and the semiconductor layer 6 was made of InGaZnO. Then, the semiconductor layer 6 was patterned by photolithography and wet etching.

  Next, as shown in FIG. 7 (d), a resist pattern having a pattern opposite to that of the source electrode 4, the source wiring 4 ′, the drain electrode 5 and the pixel electrode 5 ′ is formed in advance across the semiconductor layer 6 and then ITO is formed. Then, the source electrode 4, the source wiring 4 ′, the drain electrode 5, and the pixel electrode 5 ′ were formed by lift-off.

  Next, as illustrated in FIG. 7E, an interlayer insulating film 8 was formed on the gate wiring 2 ′, the source wiring 4 ′, and the semiconductor layer 6 by screen printing with a fluororesin. This interlayer insulating film 8 also has a sealing role. Thus, a thin film transistor substrate with the color filter 11 was produced.

  On the other hand, as shown in FIG. 4B, an ITO film was formed as a counter electrode 31 on a polyethylene terephthalate substrate as a counter substrate 32, and an electrophoretic capsule was applied as an electrophoretic body 30. The image display device 50 was manufactured by bonding to the thin film transistor substrate with the color filter 11.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into RGCM by calculation, and color display of Expressions 1.1 to 1.6, and colors of Expressions 2.1 to 2.12. Confirmed that it can be displayed.

  An image display device having a GBMY color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the GBMY color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi to GBMY by calculation, color display of Expressions 3.1 to 3.6, and colors of Expressions 4.1 to 4.12 Confirmed that it can be displayed.

  An image display device having a BRYC color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the BRYC color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into BRYC by calculation, color display of Expressions 5.1 to 5.6, and colors of Expressions 6.1 to 6.12. Confirmed that it can be displayed.

  An alignment film (not shown) was applied on the thin film transistor substrate with the color filter 11 manufactured in the same manner as in Example 3, and a rubbing process was performed. An Al film is formed as a counter electrode 31 on a glass substrate as the counter substrate 32, an alignment film (not shown) is applied, and a seal portion 36 is formed around a rubbing treatment, and a spacer (not shown). 5), the TN mode liquid crystal was sealed as the liquid crystal layer 33, and the image display device shown in FIG. 5B was manufactured. .

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into BRYC using a look-up table, and color display of Expressions 5.1 to 5.6, Expressions 6.1 to 6.12 are performed. It was confirmed that color display was possible.

First, as shown in FIG. 8A, a polyethylene naphthalate substrate was used as the substrate 1. Next, SiO ₂ was formed as a gas barrier layer (not shown) on the substrate 1 by a CVD method. Thereafter, resists of green 11G, blue 11B, magenta 11M and yellow 11Y were applied, exposed, developed and baked to form a pattern. Here, the arrangement of the color filters 11 of green 11G, blue 11B, magenta 11M, and yellow 11Y is shown in FIGS. Next, an overcoat layer 11OC was formed by applying and baking a transparent overcoat agent on the entire surface.

  Next, as shown in FIG. 8B, an ITO film is formed on the overcoat layer 11OC by sputtering, and the gate electrode 2, the gate wiring 2 ′, the capacitor electrode 9, and the capacitor wiring 9 are formed by photolithography and wet etching. Formed.

  Next, as shown in FIG. 8C, the gate insulating film 3 and the semiconductor layer 6 are continuously formed by sputtering so as to cover the gate electrode 2, the gate wiring 2 ′, the capacitor electrode 9, and the capacitor wiring 9 ′. did. The gate insulating film 3 was made of SiON, and the semiconductor layer 6 was made of InGaZnO. And InGaZnO was patterned by photolithography and wet etching.

  Next, as shown in FIG. 8 (d), a resist pattern having a pattern opposite to that of the source electrode 4, the source wiring 4 ', the drain electrode 5, and the pixel electrode 5' is formed in advance across the semiconductor layer 6 and then ITO is formed. Then, the source electrode 4, the source wiring 4 ′, the drain electrode 5, and the pixel electrode 5 ′ were formed by lift-off.

  Next, as shown in FIG. 8E, after forming a resist pattern opposite to the sealing layer (not shown) on the source electrode 4, the source wiring 4 ′, the drain electrode 5 and the pixel electrode 5 ′ in advance. SiON was deposited and a sealing layer was formed by lift-off. Thereafter, an interlayer insulating film 8 having an opening was formed on the pixel electrode 5 'by coating, exposing, developing, and baking a resist. Next, an ITO film was formed by sputtering, and the upper pixel electrode 10 was formed by photolithography and wet etching.

  On the other hand, as shown in FIG. 4B, an ITO film was formed as a counter electrode 31 on a polyethylene terephthalate substrate as a counter substrate 32, and an electrophoretic capsule was applied as an electrophoretic body 30. An image display device was manufactured by bonding to a thin film transistor substrate with the color filter 11.

  Ri, Gi, Bi analog signals are converted into GBMY signals using an adder, divider, limiter, etc., and driven, and color display of Equations 5.1 to 5.6, Equations 6.1 to 6.1 are performed. It was confirmed that 6.12 color display could be performed.

  An image display device having an RGCM color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the RGCM color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into RGCM by calculation, and color display of Formula 1.1A to Formula 1.6A, Color of Formula 2.1A to Formula 2.12A Confirmed that it can be displayed. However, k = 0.2.

  An image display device having an RGCM color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the RGCM color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into RGCM by calculation, and color display of Formula 1.1A to Formula 1.6A, Color of Formula 2.1A to Formula 2.12A Confirmed that it can be displayed. However, k = 1.

  An image display device having an RGCM color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the RGCM color filter 11 is shown in FIGS.

  Driving was performed using data obtained by converting image data given by Ri, Gi, Bi to RGCM by calculation, and it was confirmed that color display of Equations 2.1B to 2.26B could be performed.

  An image display device having a GBMY color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the GBMY color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into GBMY by calculation, color display of Equations 3.1A to 3.6A, and colors of Equations 4.1A to 4.12A Confirmed that it can be displayed. However, k = 0.2.

  An image display device having a GBMY color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the GBMY color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into GBMY by calculation, color display of Equations 3.1A to 3.6A, and colors of Equations 4.1A to 4.12A Confirmed that it can be displayed. However, k = 1.

  An image display device having a GBMY color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the GBMY color filter 11 is shown in FIGS.

  It was confirmed that image data given by Ri, Gi, Bi was driven using data converted to GBMY by calculation, and that color display of equations 4.1B to 4.26B could be performed.

  An image display device having a BRYC color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the BRYC color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into BRYC by calculation, and color display of Equations 5.1A to 5.6A, and colors of Equations 6.1A to 6.12A Confirmed that it can be displayed. However, k = 0.2.

  An image display device having a BRYC color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the BRYC color filter 11 is shown in FIGS.

  Driving is performed using data obtained by converting image data given by Ri, Gi, Bi into BRYC by calculation, and color display of Equations 5.1A to 5.6A, and colors of Equations 6.1A to 6.12A Confirmed that it can be displayed. However, k = 1.

  An image display device having a BRYC color filter 11 was manufactured in the same process as in Example 1. Here, the arrangement of the BRYC color filter 11 is shown in FIGS.

  It was confirmed that the image data given by Ri, Gi, Bi was driven using the data converted into BRYC by calculation, and color display of Equations 6.1B to 6.26B could be performed.

  DESCRIPTION OF SYMBOLS 1 ... Board | substrate, 2 ... Gate electrode, 2 'gate wiring, 3 ... Gate insulating film, 4 ... Source electrode, 4' source wiring, 5 ... Drain electrode, 5 'pixel electrode, 6 ... Semiconductor layer, 8 ... Interlayer insulating film , 9: Capacitor electrode, 9 'capacitor wiring, 10 ... Upper pixel electrode, 11 ... Color filter, 11R ... Red, 11G ... Green, 11B ... Blue, 11C ... Cyan, 11M ... Magenta, 11Y ... Yellow, 11OC ... Overcoat 20 ... Thin film transistor array, 30 ... Electrophoresis body, 31 ... Counter electrode, 32 ... Counter substrate, 33 ... Liquid crystal layer, 34 ... First quarter wave plate, 35 ... First polarizing plate, 36 ... Sealing part , 37 ... second polarizing plate, 38 ... second quarter wave plate, 39 ... backlight, 50 ... image display device

Claims (13)

  One pixel is a sum of two colors of red (R), green (G), and blue (B) and two complementary colors of red (R), green (G), and blue (B). An image display device comprising four sub-pixels. A substrate,
A color filter formed on the substrate;
A thin film transistor array formed on the color filter;
A display medium formed on the thin film transistor array;
An image display device comprising a counter electrode formed on the display medium,
The image display device according to claim 1, wherein the image display device is a reflective display device or a transflective display device.   The image display device according to claim 2, wherein the display medium is a liquid crystal or an electrophoretic material. The substrate and the thin film transistor array are substantially transparent;
4. The image display device according to claim 2, wherein display is performed on the substrate side.   The color filter is a sum of two colors of red (R), green (G), and blue (B) and two complementary colors of red (R), green (G), and blue (B). The image display device according to claim 2, comprising four colors of subpixels. From the color data of red (Ri), green (Gi), and blue (Bi),
When Ri + Gi> 0 C0 = (2 + k) / (2 + 2k) × Bi × (Gi + k × Bi) / (Ri + Gi + k × Bi)
M0 = (2 + k) / (2 + 2k) × Bi × (Ri + k × Bi) / (Ri + Gi + k × Bi)
R0 = max (Ri−M0,0)
G0 = max (Gi−C0, 0)
MIN = min (R0, G0, C0, M0)
MAX = max (R0, G0, C0, M0)
C = C0 × MIN / MAX + C0
M = M0 × MIN / MAX + M0
R = R0 × MIN / MAX + R0
G = G0 × MIN / MAX + G0
When Ri = Gi = 0 C = M = (2 + k) / (2 + 2k) × Bi
R = G = 0
6. The data conversion unit according to claim 1, further comprising: a data conversion unit that obtains color data of RGC (cyan) M (magenta) for color display by a real number of 0 or more and 1 or less. Image display device. From the color data of red (Ri), green (Gi), and blue (Bi),
When Ri + Gi ≧ Bi> 0 C0 = Bi × Gi / (Ri + Gi)
M0 = Bi × Ri / (Ri + Gi)
R0 = max (Ri−M0,0)
G0 = max (Gi−C0, 0)
C1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × C0
M1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × M0
MIN = min (R0, G0, C1, M1)
MAX = max (R0, G0, C1, M1)
C = C1 × MIN / MAX + C1
M = M1 × MIN / MAX + M1
R = R0 × MIN / MAX + R0
G = G0 × MIN / MAX + G0
When Bi> Ri + Gi> 0 C0 = Bi × (Gi−Ri + Bi) / (Ri + Gi + Bi)
M0 = Bi × (Ri−Gi + Bi) / (Ri + Gi + Bi)
R0 = max (Ri−M0,0)
G0 = max (Gi−C0, 0)
C1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × C0
M1 = (Ri + Gi + Bi) / (R0 + G0 + 2 (C0 + M0)) × M0
MIN = min (R0, G0, C1, M1)
MAX = max (R0, G0, C1, M1)
C = C1 × MIN / MAX + C1
M = M1 × MIN / MAX + M1
R = R0 × MIN / MAX + R0
G = G0 × MIN / MAX + G0
When Ri + Gi = 0 C = M = Bi / 4
R = G = 0
6. The image display device according to claim 1, further comprising data conversion means for obtaining color data for color display RGC (cyan) M (magenta). From the color data of red (Ri), green (Gi), and blue (Bi),
When Gi + Bi> 0 M0 = (2 + k) / (2 + 2k) × Ri × (Bi + k × Ri) / (Gi + Bi + k × Ri)
Y0 = (2 + k) / (2 + 2k) × Ri × (Gi + k × Ri) / (Gi + Bi + k × Ri)
G0 = max (Gi−Y0, 0)
B0 = max (Bi−M0,0)
MIN = min (G0, B0, M0, Y0)
MAX = max (G0, B0, M0, Y0)
M = M0 × MIN / MAX + M0
Y = Y0 × MIN / MAX + Y0
G = G0 × MIN / MAX + G0
B = B0 × MIN / MAX + B0
When Gi = Bi = 0 M = Y = (2 + k) / (2 + 2k) × Ri
G = B = 0
6. The data conversion unit according to claim 1, further comprising data conversion means for obtaining color display GBM (magenta) Y (yellow) color data by using a real number between 0 and 1 inclusive. Image display device. From the color data of red (Ri), green (Gi), and blue (Bi),
When Gi + Bi ≧ Ri> 0 M0 = Ri × Bi / (Gi + Bi)
Y0 = Ri × Gi / (Gi + Bi)
G0 = max (Gi−Y0, 0)
B0 = max (Bi−M0,0)
M1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × M0
Y1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × Y0
MIN = min (G0, B0, M1, Y1)
MAX = max (G0, B0, M1, Y1)
M = M1 × MIN / MAX + M1
Y = Y1 × MIN / MAX + Y1
G = G0 × MIN / MAX + G0
B = B0 × MIN / MAX + B0
When Ri> Gi + Bi> 0 M0 = Ri × (Bi−Gi + Ri) / (Ri + Gi + Bi)
Y0 = Ri × (Gi−Bi + Ri) / (Ri + Gi + Bi)
G0 = max (Gi−Y0, 0)
B0 = max (Bi−M0,0)
M1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × M0
Y1 = (Ri + Gi + Bi) / (G0 + B0 + 2 (M0 + Y0)) × Y0
MIN = min (G0, B0, M1, Y1)
MAX = max (G0, B0, M1, Y1)
M = M1 × MIN / MAX + M1
Y = Y1 × MIN / MAX + Y1
G = G0 × MIN / MAX + G0
B = B0 × MIN / MAX + B0
When Gi + Bi = 0 M = Y = Ri / 4
G = B = 0
6. The image display device according to claim 1, further comprising data conversion means for obtaining color data for color display GBM (magenta) Y (yellow). From the color data of red (Ri), green (Gi), and blue (Bi),
When Bi + Ri> 0 Y0 = (2 + k) / (2 + 2k) × Gi × (Ri + k × Gi) / (Bi + Ri + k × Gi)
C0 = (2 + k) / (2 + 2k) × Gi × (Bi + k × Gi) / (Bi + Ri + k × Gi)
B0 = max (Bi−C0,0)
R0 = max (Ri−Y0,0)
MIN = min (B0, R0, Y0, C0)
MAX = max (B0, R0, Y0, C0)
Y = Y0 × MIN / MAX + Y0
C = C0 × MIN / MAX + C0
B = B0 × MIN / MAX + B0
R = R0 × MIN / MAX + R0
When Bi = Ri = 0 Y = C = (2 + k) / (2 + 2k) × Gi
B = R = 0
6. The data conversion unit according to claim 1, further comprising a data conversion unit that obtains color data of BRY (yellow) C (cyan) for color display using a real number of 0 or more and 1 or less. Image display device. From the color data of red (Ri), green (Gi), and blue (Bi),
When Bi + Ri ≧ Gi> 0 Y0 = Gi × Ri / (Bi + Ri)
C0 = Gi × Bi / (Bi + Ri)
B0 = max (Bi−C0,0)
R0 = max (Ri−Y0,0)
Y1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × Y0
C1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × C0
MIN = min (B0, R0, Y1, C1)
MAX = max (B0, R0, Y1, C1)
Y = Y1 × MIN / MAX + Y1
C = C1 × MIN / MAX + C1
B = B0 × MIN / MAX + B0
R = R0 × MIN / MAX + R0
When Gi> Bi + Ri> 0 Y0 = Gi × (Ri−Bi + Gi) / (Ri + Gi + Bi)
C0 = Gi × (Bi−Ri + Gi) / (Ri + Gi + Bi)
B0 = max (Bi−C0,0)
R0 = max (Ri−Y0,0)
Y1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × Y0
C1 = (Ri + Gi + Bi) / (B0 + R0 + 2 (Y0 + C0)) × C0
MIN = min (B0, R0, Y1, C1)
MAX = max (B0, R0, Y1, C1)
Y = Y1 × MIN / MAX + Y1
C = C1 × MIN / MAX + C1
B = B0 × MIN / MAX + B0
R = R0 × MIN / MAX + R0
When Bi + Ri = 0 Y = C = Gi / 4
B = R = 0
6. The image display device according to claim 1, further comprising data conversion means for obtaining color display BRY (yellow) C (cyan) color data. Prepare the board
One pixel on the substrate has two colors of red (R), green (G), and blue (B) and two colors of red (R), green (G), and blue (B). A total of four sub-pixels with complementary colors are formed,
Forming a thin film transistor array including a capacitor electrode and a pixel electrode on the subpixel;
A method of manufacturing an image display device, wherein a display medium is sandwiched between the thin film transistor array and a counter electrode formed on the separate substrate by bonding the thin film transistor array and the separate substrate.   The method for manufacturing an image display device according to claim 12, wherein the display medium is a liquid crystal or an electrophoretic material.