TW499814B - Image display device - Google Patents

Abstract

The present invention provides an image display unit for displaying color images, specifically an image display unit used under an environment where external light exists, for displaying images in small contrast and excellent in visibility for appreciation. To achieve the object, a black approximation data generating means (4) generates black approximation data (R3, G3, B3), or data involving chromaticity provided when black is displayed by an image displaying means (3), a black correcting means (2A) subtracts subtracting data (R4, G4, B4) having the same values as the black approximation data (R3, G3, B3) from image data (R1, G1, B1) after input processing to calculate after-black-correction image data (R2, G2, B2), and the image displaying means (3) emits light according to the values of after-black-correction data (R2, G2, B2) to thereby perform an image display processing on a preset image screen.

Description

499814 A7

V. Description of the invention (1) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 312179 [Technical Field to which the Invention belongs] The present invention relates to a day image display device that displays a color day image, such as a monitor or a projector In particular, the image display device used in the presence of external light environment and the day image display device with a relatively large brightness from time to time due to its characteristics. [Known Technology] FIG. 29 is a block diagram showing a configuration example of a conventional day image display device. The operation of the conventional image display device will be described below with reference to this figure. As shown in FIG. 29, the image display device is constituted by an input image processing device image display device $. As shown in FIG. 29, the image data Ri, Gi, and Bi made up of the three-color (and, 0, and B) data of the day image display device are input to the wheel-in portrait device 1. The inputted image data Ri, Gi, and Bi are input to the day image processing device 1, and after input image processing described later, the image data R1, Gl, and B1 made of three kinds of color data are output. The image data R1, G1, and B1 rotated out by the day-to-day image processing device i are transmitted to the day-image display device 3. The day image display device 3 emits light according to the image data of each pixel to display a day image. Here, the image display device may be a liquid crystal panel, a CRT, or the like. Fig. 30 is a block diagram showing an example of the configuration of a round-in image processing device shown in Fig. 29; As shown in Fig. 30, the input image processing device is composed of a pixel number conversion device 101, a color conversion device 102, and a gray scale conversion device. The operation of the input day image processing device will be described below. The image data Ri, Gi, and Bi input to the in-round image processing device 1 are then input to the China National Standard (CNS) A4 < Specifications for Paper Size for Paper Size Variation -------- III --- Zhuangyi · I -----— Order --------- (Please read the note on the back? Matters before filling out this page) 丄 -t

、 Explanation of invention (2) Printed by the Consumer Affairs Agency of the Intellectual Property Bureau of the Ministry of Economic Affairs:,! The number of pixels is converted to match the number of display pixels of the image display device 3, and the number of pixels is alternated. Since the pixel number conversion device 101 + ^, the set 101 is output in turn, and is input to the color conversion device 10 2 'applying a color conversion process that takes into account the color reproduction characteristics of the portrait display device ^ ^ 豕 ". This multi-iron drag color conversion process can be achieved by the image display device 3 to achieve the desired color reproduction display. The self-color conversion device 102 turns out and turns into the gray-scale conversion device i 03 to perform the day image display device. The gray scale correction processing of 3 characteristics is output as image data Ri Gi and Bi. In addition, the pixel number conversion device 1 () 1, the color conversion device 1G2, and the gray scale conversion device may be composed of hardware or software. The relationship between the size of the image data R1, G1, and B1 input to the image display device 3 and the color (light) displayed on the day image display device 3 will be described below. The image display device 3 is not affected by external light. When inputting portrait data Ri gi, bi, the color (light) displayed on the image display device 3 is set to XI, Y1, based on the three stimulus values of the CIE and XYZ color system (hereinafter referred to as "tristimulus values"). Z1. The relationship between the size of the image data R1, G1, and B1 input to the image display device 3 and the three stimulus values XI, Yi, and ζ of the displayed color (light) is assumed to be an image display device represented by the following formula (1). Here Y1 corresponds to the brightness value. XI Y1 Z1 axr axg axb ayr ayg ayb azra zg a zb R1 G1 B1 / \ Xbkl Ybkl Zbkl • (1) (Please read the precautions on the back before filling out this page)-Line · \ / In formula (1) , Axr, ayr, azr, axg, ayg, azg, axb, ayb This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 male f) 2 312179 499814

Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7__ 5. Description of the invention (3) azb and Xbkl, Ybkl, Zbkl are characteristic values of the dependent image display device 3, especially Xbkl, Ybk and Zbkl are not affected by external light In the state, when the image display device 3 is displayed in black, that is, when ri = gi = b 1 = 0, the colorless (light) stimulus value displayed on the day image display device 3 is two. Let axr,, azr, axg, ayg, azg, axb, ayb, azb be the values represented by the following formula (2). axr = 0.4124? axg = 0.3 576, axb-0.1805 ayr-0.2126, ayg = 0.7152, ayb = 0.0722 ... (2) azr = 0.0193? azg = 0.1192, azb = 0.9505 and input to the day image of the image display device 3 The data R1, G1, and B1 are integers and are values of the range represented by the following formula (3). R1 ^ 100 G1 ^ 100 ... (3) B1 ^ 100 Theoretically, the three stimulus values Xbkl, Ybkl, and Zbkl during black display should all be, but in reality, they are larger, 0, and larger. Further, the external light is irradiated on the surface of the image display device 3, and the three stimulus values of the reflected light generated by the external light reflected on the surface of the image display device 3 are X2, Y2, and Z2. At this time, the three stimulus values X3, Y3, and Z3 of the light reflected in the eyes of the viewer of the viewing image display device are displayed by the input signals R1, G1, and B1 on the three stimulus values XI, XI of the color of the image display device 3. Υι, ζΐ and the sum of the three stimulus values X2, Υ2, and Z2 of the reflected light. That is, X3, Y3, and Z3 can be expressed by the following formula (4). To the viewer, the colors displayed by χ3, υ3, and ζ3 are the same as those displayed on the portrait display device 3. ----- I ----- II ---- I --- Order --------- (Please read the notes on the back before filling this page) This paper size is applicable to China Standard (CNS) A4 specification (210 297 mm) 3 312179 499814 A7 B7 V. Description of invention (4) X3 XI X2 axr axg axb R1 Xbkl + X2 Y3-Y1 + Y2 = ayr ayg ayb G1 + Ybkl + Y2 Z3 w / Z1 、 / Z2 \ / azr a zg a zb \ / B1 s / Zbkl + Z2 、 / (Please read the note on the back? Matters before filling out this page)… ⑷ According to formula (4), Xbkl + X2, Ybkl + Y2, Zbkl + Z2 are the three stimulus values for the image display device 3 when the image is displayed in black in consideration of the influence of external light. From formula (4), the changes in the three stimulus values Xbkl, Ybkl, and Zbkl when the black display is not affected by external light, and the changes in the three stimulus values χ2, Y2, and Z2 of the reflected light of external light are reflected. The three stimulus values X3, Y3, and Z3 of the viewer's eyes have the same effect. Therefore, the cases where the values of Xbkl, Ybkl, and Zbkl are fixed and the values of X2, Y2, and Z2 change due to the influence of external light are described below, but the same method can be applied when the values of Xbkl, Ybkl, and Zbkl are changed. Here, Xbkl, Ybkl, and Zbkl are set to the values shown in formula (5). >

Xbkl = l Ybkl-1 ... (5)

Zbkl = l Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 31 shows the state without external light. That is, when X2 = Y2 =: Z2 = 〇, input R1, G1, B1 and image of the image display device 3. The relationship between the color (light) tristimulus values X3 'Y3 and Z3 of the viewer's eyes is shown in table form. In Fig. 31, the relationship of R1 = G1 = B1 is established, that is, the case where no color data is input to the image display device 3. First, review the situation without the influence of external light with reference to Figure 31 '. When there is no external light effect, X2 = Y2 = Z2 = 0. The maximum value of portrait data Rl, Gl, B1 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 4 312179 499814 A7 " " ------Β7 _ V. Description of the invention (5 ) = 〇 '100' 100 is entered into the viewing when the daytime image display device 3 is input | The color of the eyes (light) is the second stimulus value, and it is in a state without the influence of external light. Please read the legal matters on the back before filling (This page) ^ 1 = 96.05 ^ 1 = 101,21 = 100 〇 ^. B 1 109.9. On the other hand, when the minimum value of the image data R1, ^ B1, 0, 0, 0 is input to the image display device 3, the color (light) two stimulus values of the eyes of the observer are in a state without the influence of external light. Xl = l, Υ1 = 1, Z1 == 1 〇 In Fig. 31, when inputting each of R1, G1, and B1 to the day image display device 3, it is reflected in the color (light) tristimulus value of the viewer's eyes, which is equivalent. The ratio of R1-100 'Gl-100' β1 == 100 (when white is displayed) to γ3 at the brightness γ3 is expressed as the contrast ratio (Y / Ymax). The smaller the value of each image data, the viewer will feel that the day image displayed on the image display device 3 has a large contrast and a day image with good visibility. FIG. 32 is a graph showing the relationship between the image data R1, G] [, B1, and the brightness stimulus value Y3 input to the day image display device 3. FIG. Next, when the conventional day image display device is used in an environment affected by external light, the day image is displayed on the image display device 3 of the conventional image display device. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 33 shows' in the state of being affected by external light, W, G1, B1 and the color (light) tristimulus values of the viewer ’s eyes, χ3, γ3. , Z3. In addition, FIG. 33 shows that the relationship of R1 = G1 = b 1 is established, that is, a case where no color data is input to the image display device 3. Here, the values of the reflected light outside the surface of the image display device 3 = the stimulus values are X2 = 9 · 505, Y2 = 10, and Z2 = l0.89. When 100 '100' 100 of the maximum value of Ri, Gl, Bl is input to the image display device 3, the paper size of this map applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 5 312179 499814 A7 B7 V. Description of the invention (6) The tristimulus values of the color (light) of the viewer's eyes are: χ3 = 105 · 555, Υ3 = 111.〇〇〇, Z3 = 120 · 790. On the other hand, when R1, G1, and B1 (please read the precautions on the back before filling in this page), the minimum value of 0,0,0 is input to the image display device 3, which reflects the stimulus of the color (light) of the viewer's eyes The values are X3 = l0.505, Υ3 = 11,000, and Z3 = l 1.890. In Figure 33, R1 = 100, Gl = 100, and Bl = 100 among the stimulus values of the color (light) of the viewer's eyes when the daylight display device 3 is input to R1, G1, and B1. Time (when displayed in white) to Y3 (Ymax) ratio is expressed as the contrast ratio (Y / Ymax). As shown in Figure 31, when there is no external light effect, the overall value becomes larger when it is affected by external light. When the external light is affected, the viewer will feel a small contrast and poor visibility. FIG. 34 is a graph showing the relationship between the image data R1, G1, B1 input to the image display device 3 and the degree stimulation value Y3. In this figure, the solid line is when it is affected by external light, and the dotted line is when it is not affected by external light. In order to improve the decrease in contrast due to the influence of external light, it may be considered to increase the display brightness of the image display device 3 when it is affected by the external light. For example, if the display brightness of the image display device 3 is doubled as described above, the image display device prints the color (light) tristimulus values χι, γ1, and Z1 displayed in the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economy. The value will be doubled. Fig. 35 makes the display brightness of the daytime image display device 3 twice that of the above case, the ri'gi'bi under the influence of external light and the stimulus values X3 and γ3 of the color (light) reflected in the eyes of the viewer The explanation of the relationship between Z3 and Z3 is shown graphically. Furthermore, the relationship of R1 = G1 = B1 in FIG. 35 is established, that is, the case where the achromatic data is input to the image display device 3. Here, as in the case of FIG. 33, the light reflection outside the surface of the image display device 3 is based on the Chinese National Standard (CNS) A '] " i C210 X 297 public love 6 312179 499814 Λ7 V. Description of the invention (7) The two stimulation values are X2 = 9.505, Y2 = 10, and B 2 = 10.89. In Fig. 35, it is also reflected in the Hoshiki at each of ri, gi, and b. The color of the eyes of the viewer is entered at the image display device 3. R1 = 100, CH = 100, B1 = 100 Aida The ratio of Y3 in Yu Erxue (when hw is displayed) to Y3 (Ymax) is expressed as the contrast ratio (Y / Ymax). Thousands of ancient sores' & doubled the undetermined redundancy of the image display device 3, compared with the helmet outer # and the plastic knot as shown in Fig. 35, and the dialogue ratio was closer to ... Figure 31 of the dialogue. ju μ ^ ^., Ren is still a large value compared with Fig. 32. Moreover, in consideration of cost problems, problems, and the like, it is a technical background to make the image display device 3 significantly dry = a problem and a problem of durability. …, It is also very difficult to double the monthly exemption. When the brightness of the "usually used image display device" is affected by external light and the brightness of the black display due to the characteristics of the image display device becomes large, the image data The contrast ratio (Y / Ymax) of the brightness ratio to the brightness ratio during white display is greatly increased, and the viewer will experience problems such as small contrast and poor visibility. Also, by increasing the brightness displayed by the day image display device to reduce the increase in the ratio of brightness to white display, it is very difficult due to problems such as cost, power consumption, and durability, and the improvement effect is not great. And so on. [Objective of the Invention] The object of the present invention is to solve the above-mentioned problems. The researcher and the creator of the present invention can also correct the brightness when it is affected by external light and when the brightness is large in black display due to the characteristics of the day image display device. Viewers can display portraits with small contrast and good visibility, and at the same time can reduce the increase in the ratio of brightness during white display. Therefore, this paper does not apply the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 7 312179 499814 A7 V. Description of the Invention (8) Problems such as the increase in the cost and power consumption of the day image display device, or the decrease in the number of years of durability have occurred. (Please read the precautions on the back before filling this page.) The first form of the image display device related to the present invention is: The black correction section 'performs black correction processing on the image data containing color data to correct the reproducibility of black. Output image data after black correction; and an image display device for performing image display on a predetermined screen based on the image data after black correction, and the black correction unit executes the foregoing according to the characteristics of the image display device during black display Black correction processing. In the second aspect of the image display device related to the present invention, the color data includes a predetermined number of color data, and the black correction unit includes a black approximation data generating device, which is based on the image display device during the lean display. Black approximation data of at least one of luminance, chroma, and tristimulus values involved in the black display of characteristics; and a black correction device, which performs a subtraction process of the aforementioned image data based on the aforementioned black approximation data, and implements the aforementioned predetermined number of The image data after the black correction is output in color data units. In the third form of the image display device related to the present invention, which is printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the aforementioned black correction device includes a subtraction device, which is to approximate the aforementioned black data from the aforementioned day image data by the aforementioned prescribed number. The color data unit is subjected to subtraction processing to obtain subtraction data, and a limiter, which sets the color data of underfill, 0, and 0 in the predetermined number of color data of the aforementioned subtraction data. In order to describe the black corrected image data. In the fourth aspect of the image display device according to the present invention, the black correction device includes a reduction device for subtracting the black approximate data from the day image data into the predetermined number of color data units to obtain a reduction 312179. This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm Ding " '--------- 8 B7 B7

'Ministry of Economics-Intellectual Property Bureau employee consumer cooperatives printed five, the data after the invention description (9); additional counts; # Health ,, 0 ,, the above knowledge μ set' is based on the aforementioned reduced data issued to add the aforementioned additions: Data for private use; and the addition device 'is image data obtained by adding corrections to the color-coded units of the predetermined number after the above-mentioned reduction, and performing correction processing. Correction: In the fifth form of the image display device of Guan, the aforementioned black = two times. The subtraction data calculation device is to multiply the aforementioned black approximate data according to the multiplication coefficient of the aforementioned image ^ to obtain the subtraction data; And the reduction device, for the first, 4 for the self-selection of the image data, the aforementioned color reduction unit and a predetermined number of color data units are subjected to the reduction processing, and the resulting reduced data is output as the aforementioned black corrected image data. μ In the sixth aspect of the image display device according to the present invention, the aforementioned nose reduction data calculation device includes: a multiplication coefficient calculation device for calculating a multiplication coefficient of T or less based on the aforementioned image data; and a multiplication device, In order to obtain the subtraction data by multiplying the black approximation data by the multiplication coefficient, the multiplication coefficient calculation device further includes: a multiplication coefficient candidate output unit for outputting the image data corresponding to the foregoing specification according to the image data. The multiplication coefficient candidate 'of the predetermined number of color data and the minimum value selection means select the smallest multiplication coefficient candidate among the predetermined number of multiplication coefficient candidates and output the aforementioned multiplication coefficient. In the seventh aspect of the image display device according to the present invention, the aforementioned correction device includes: a subtraction data calculation device, which subtracts from the aforementioned black approximation data to obtain subtraction data in accordance with the adjustment data of "0" or more of the aforementioned image data. Data; and a reduction device, after subtracting the aforementioned data for color reduction from the aforementioned portrait data to the prescribed number of color data units to reduce the income (please read the precautions on the back before filling out this page) This paper size applies to China Standard (CNS) A-〗 Regulations (210 χ 297 mm) 9 312179 499814 A7 ---- B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (1 ()) Portrait data output. In the eighth aspect of the image display device according to the present invention, the color data includes a predetermined number of color data, and the black correction unit includes: a black approximation data generating device for generating the black based on the image display device. Display characteristics: Black approximation data of at least one of luminance, chroma, and tristimulus values during black display; a lookup table (100k> up Uble) for storing table data; and table data writing Into the device so that a table data of the black corrected image data can be derived from the black approximate data and the day image data into a lookup table, and the lookup table refers to the table data and is obtained based on the day image data The black corrected image data. In a ninth aspect of the image display device according to the present invention, the color data includes a predetermined number of color data, and the black correction unit includes: a black approximation data generating device, which is a characteristic when the black display according to the image display device occurs. Black approximation data involving at least one of the Brahma, Chroma and Tristimulus values during black display; a black correction device that subtracts the black approximation data from the aforementioned predetermined number of color data units from the image data and Outputting the aforementioned black-corrected portrait data; and a gray-scale conversion device for outputting gray-scale corrected day-to-day image data by performing the gray-scale conversion on the aforementioned black-corrected image data, and said day-image display device includes a portrait display device as a basis The gray scale corrected image data is displayed on the aforementioned predetermined screen. The gray scale conversion device displays at least one of the brightness, color production, and tristimulus value of the color on the image display device as the black corrected data. Become linear, to get the image after the aforementioned tone correction. In the tenth aspect of the image display device related to the present invention, the foregoing (please read the precautions on the back before filling this page) ·. Line-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) ) 10 312179 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 499814 Λ7 " " U '-... m ................ .......... η …… Β / V. Description of the invention (U) The data are color data with a predetermined number. The department includes: an external light detection device for irradiating light outside the aforementioned predetermined screen surface of the image display device, and detecting at least one of brightness, chromaticity, and tristimulus values to output external light detection data; and a black approximation The data calculation and generating means calculates the black approximation data generated by the image display device based on the black approximation data of the characteristics at the time of the black display based on the external light detection data. In the U-th aspect of the image display device according to the present invention, the characteristics of the daytime image display device in black display include reflected light characteristics of the image display device outside the predetermined daylight surface. In a twelfth aspect of the image display device according to the present invention, the reflected light characteristic of the external light includes at least one of brightness, chromaticity, and tristimulus value of the color of the external light reflected light. In the thirteenth aspect of the image display device according to the present invention, the black approximation data includes, in a state without external light influence, the brightness, chroma, and The difference between the image index value of at least one of the three stimulus values and the image index value during the black display of the image display device is set to a black approximation of the reflected light of the external light to become the black approximation of the image index value. data. In a fourteenth aspect of the image display device according to the present invention, the characteristics of the image display device during black display include at least one of the brightness, chroma, and tristimulus value of the color of the image display device during black display. In the fifteenth aspect of the image display device according to the present invention, the aforementioned black approximation data includes black approximation data, and is a color displayed when the aforementioned black approximation data is input to the aforementioned image display device when there is no external light affecting the form. Bright & Zhang scales are applicable to China National Standard (CNS) A4 specifications ⑵Ο X 297 公 f) — '~-—- II 312179 -------- ^ ---- I --- 丨 line (please (Please read the notes on the back before filling this page) 丄 Η 丄 Η Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (12) At least one portrait index value of the degree, color and tristimulus value 刺激The difference between the display of the image display device in the aforementioned image display device ..., the display index value from time to time and the aforementioned image index value, the color setting of the image display device when the black display is affected by external light The value becomes the black approximation data of the aforementioned image index value. In the first form of the day image display device related to the present invention, the characteristics of the aforementioned image display device in the black display 3f are black and white, and are in the form of the seal A t of the aforementioned image display device without the influence of external light. From time to time it includes at least one of brightness, chroma and tristimulus value. According to the i-th aspect of the day image display device according to the present invention, the image processing data after the black correction processing is obtained due to the black correction processing due to the characteristics of the black correction = partial image display device in black display. The display device displays the image on a prescribed day and is called a hug. The viewer can obtain an image display effect with small contrast and good visibility. At this time, since the image display device does not need to change the brightness, the image display device does not cause problems such as increase in cost, power consumption, or reduction in durability. According to the second form of the portrait display device related to the present invention, the black correction device is used to perform the subtraction processing based on the black approximation & color data units according to a predetermined number of color data units. The black correction can be obtained by a relatively simple process. After the data. According to the third aspect of the image display device according to the present invention, since a limiter is provided, the data after the black correction can be avoided. "0", which is not appropriate. According to the fourth aspect of the image display device according to the present invention, With the addition device, based on the subtracted data, 0, 0, and the above-mentioned addition data, the reduced data is added in a predetermined number of color data units to obtain a black-corrected 'paper scale applicable to Chinese national standards. 4 specifications do x 297 Xia 2 312179 (Please read the precautions on the back before filling out this page) · ·. Line-499814 A7 V. Description of the invention (13) Image data, so even if the data value after the subtraction is very small, It can prevent the image data from becoming “full” after black correction. (Please read the precautions on the back before filling this page.) According to the fifth aspect of the image display device related to the present invention, the device is calculated by subtracting data. Multiplying the black approximation data based on the multiplication coefficient of the image data "1" or less to obtain the subtraction data, so that even if the image data value is very small, the black correction can be avoided. According to the sixth aspect of the image display device according to the present invention, the minimum selection device selects the minimum multiplication coefficient candidate from a predetermined number of multiplication coefficient candidates. Because of the multiplication factor, even if the day image data value is very small, it is possible to surely avoid the black correction after the day image data becomes underfilled, 0, and. According to the seventh aspect of the image display device according to the present invention, The subtraction data calculation device will obtain the subtraction data by subtracting the black approximation data based on the adjustment data of the image data, 0, 0, and above. Even if the image data value is very small, the image data after the black correction can be prevented from becoming underfilled. ,, 0 ,, is not appropriate. According to the eighth form of the image display device related to the present invention, the main part of the black correction section is realized by using a lookup table, which can simplify the circuit configuration. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs According to the ninth aspect of the image display device according to the present invention, the gray scale conversion device displays the brightness, chromaticity, and tristimulus values of the color of the day image display device. At least one of them, in a way that the data after the black correction becomes linear, because the image data after the grayscale correction can be obtained, when the gray a characteristic of the image display device is non-linear, for the viewer. ^ ^ ^ a Knife J is built to have a small contrast and good visibility. The portrait display according to the present invention shows the M-scale scale and fine Chinese National Standard (CNS) Am grid (210 ϋ 公 f 7 " __ 罝 之 苐 1 〇Form, portrait display 312179 13 499814 A7 B7 V. Description of the invention (14) The display device has an external light detection device that detects at least one of the brightness, chromaticity, and tristimulus value of the external light irradiated on the specified screen surface and outputs it. External light inspection. It is not necessary to set the black approximation data in advance, and the black approximation data suitable for the environment of the image display device can be obtained frequently. According to the eleventh aspect of the daytime image display device according to the present invention, the characteristics of the image display device when it is displayed in black include the fact that the image display device specifies the reflected light characteristics of light outside the daytime surface. The viewer can also display a small contrast and good visibility. According to the twelfth aspect of the portrait display device according to the present invention, the characteristics of the day-image display device during black display include at least one of the brightness, chromaticity, and tristimulus value of the color of external light reflection, even if it is caused by When the external stimulus value is black and the three stimulus values of the color become larger, the viewer can also have a small contrast and good visual display. According to the thirteenth aspect of the day image display device according to the present invention, at least one of the acceptance, chromaticity, and distimulus values of the color displayed when the 'black approximate data' is input to the image display device in the state without the influence of external light The difference between the index value and the index value of the image display device when it is displayed in black is due to the use of black approximation data for the daylight image index value set by the reflected light set as external light, even if it is affected by external light. At the same time, it is also possible for the viewer to display portraits that are smaller than the size and have good visibility. According to the fourteenth aspect of the image display device according to the present invention, the characteristics of the image display device when displayed in black include 'at least one of the brightness, chromaticity, and tristimulus value of the color of the image display device when displayed in black. The reason 'Even if the brightness, chromaticity, and three paper sizes of the color displayed in the black of the day image display device are applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) " ----— 14 312179 ( Please read the notes on the back before filling out this page.) Order · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs and printed on 499814 A7 V. Invention Description (15) When at least one of the stimulus values becomes larger, it can also be adjusted to 1 gauge. There are small contrasts and good visibility. According to the image display device according to the present invention, ^ ^ ^ ^ ^ ^ ^ ^ Xia and Di 15 form, the color of the display of the color, the chromaticity, and the three stimuli when the black approximate data of the "sound-like cancer" black approximate data is input into the device when the image is displayed At least _ kinds of day image index values and the difference between the color of the image display device when it is displayed in black and the above day image index value, because it includes the color setting of the image display device when it is displayed in black when it is affected by external light As a result of the black approximation data of the above-mentioned portrait index values, even when affected by external light and the above-mentioned portrait index values of the color displayed by the image display device in black become large, the viewer can have a small contrast and good visibility. Image display According to the sixteenth aspect of the day image display device according to the present invention, the characteristics of the image display device when displayed in black are included in the redundancy, chromaticity, and tristimulus values of the color of the image display device when displayed in black. For at least one reason, when at least one of the brightness, chromaticity, and tristimulus value of the color displayed in black becomes large, the image display device can also display a small, contrast-friendly, good-looking artifact display to the viewer. The characteristics, situation, and advantages can be obtained from the following detailed description and drawings. [Simplified description of the diagram] Fig. 1 is a block diagram of an image display device according to an embodiment of the present invention. Fig. 2 is a diagram showing Example of the internal structure of the black correction device shown in Fig. 4 Figure 3 is for viewing the image display device of Embodiment 1 ---- ^ II (Please read the precautions on the back before filling this page) · -丨 Line · Printed by the Consumers 'Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is printed in accordance with the Chinese National Standard (CNS) A4 (210 X 297 male f) 15 312179 499814 Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 Description of the invention (16) The light of the viewer ’s eyes is shown in table form according to the relationship between the CIE XYZ color system and the three stimulus values. Figure 4 shows the viewer ’s eyes without being affected by external light. The relationship between the color and the tristimulus value is shown in table form. Figure 5 is a graph showing the coordinates of the day image data and the brightness stimulus value after the input processing. Figure 6 is the structure of an image display device according to the second embodiment of the present invention. Block diagram. Picture 7 is for viewing The image display device of Embodiment 2 reflects the light of the viewer's eyes, and is illustrated in the form of a table in accordance with the relationship between the CIE XYZ color system and the tristimulus value. Figure 8 shows the image under the influence of external light. The relationship between the color of the viewer ’s eyes and the tristimulus value is shown in table form. FIG. 9 is an illustration showing the relationship between the color of the imaginary image display device and the viewer's eye and the tristimulus value in table form. Fig. 10 is a coordinate diagram of the relationship between the image data and the brightness stimulus value after the input processing. Fig. 11 is a block diagram showing the structure of the black correction device of the day image display device according to Embodiment 3 of the present invention. Figs. 12 (a) to ( c) Coordinate diagram of the relationship between the data after subtraction and the data for addition. Fig. 13 is an explanatory diagram showing the relationship between the stimulus value of the CIE XYZ color system and the three stimulus values, which is reflected in the eyes of the viewer when viewing the image display device of the implementation of Figure 3. This paper size applies Chinese National Standard (CNS) A’l specification (210 X 297 male f) 16 312179 (Please read the phonetic on the back? Matters before filling this page)

Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 499814 Α7 Β7 V. Description of the Invention (π) Figure 14 is the coordinate diagram of the relationship between the day image data and the brightness stimulus value after input processing. Fig. 15 is a block diagram showing a configuration example of a black correction device of an image display device according to a fourth embodiment of the present invention. Fig. 16 is a block diagram showing an example of the internal configuration of a multiplication coefficient calculation device. Fig. 17 is a graph showing an example of the relationship between day image data after input processing and data after black correction. FIG. 18 is an explanatory diagram showing the relationship between the light of the daytime image display device of Embodiment 4 and the viewer's eyes, and the relationship between the CIE XYZ color system and the three stimulus values. Fig. 19 is a graph showing the relationship between the image data after input processing and the brightness stimulus value. Fig. 20 is a block diagram showing a configuration example of a black correction device for a day image display device according to Embodiment 5 of the present invention. Fig. 21 is a block diagram showing an example of the configuration of the multiplication factor calculation device shown in Fig. 20. Fig. 22 is a block diagram showing an example of the configuration of a multiplication coefficient of a portrait display device according to a sixth embodiment of the present invention. Fig. 23 is a block diagram showing a configuration example of an image display device according to a seventh embodiment of the present invention. Fig. 24 is a block diagram showing a configuration example of an image display device according to an eighth embodiment of the present invention. Fig. 25 is a block diagram showing a configuration example of an image display device according to a ninth embodiment of the present invention. -------------- Install -------- Order --------- Line (Please read the phonetic on the back? Matters before filling out this page) This paper Appropriate standard Chinese standard (CNSM4 specification (20.1 × 297 mm) 17 312179 14 A7

V. Description of the Invention (18) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Figure 26 is a block diagram showing an example of the structure of the portrait display device 10 of Embodiment 10 of the present invention. Fig. 27 is a block diagram showing an example of the configuration of the adjustment data calculation & The 28th figure is a graph of the relationship between the input processing < day image data and the black corrected data-examples. Fig. 29 is a block diagram showing a configuration example of a conventional day image display device. Fig. 30 is a block diagram showing a configuration example of the input day image processing device of Fig. 29. Fig. 31 is an explanatory diagram showing the relationship between the color reflected in the eyes of the viewer and the distimulus value in a state without being affected by external light. Fig. 32 is a graph showing the relationship between the input image data of the day image display device and the brightness stimulus value. Fig. 33 is an explanatory diagram showing the relationship between the color reflected in the eyes of the viewer and the tristimulus value under the influence of external light in the form of a table. Fig. 34 is a graph showing the relationship between the image data and the brightness stimulus value of the input image display device. Fig. 35 is an explanatory diagram showing the relationship between the three stimulus values reflecting the color of the viewer's eyes under the influence of external light when the display brightness of an image display device is twice that of the ordinary. [Description of component symbols] 1-round image processing device 3 day image display device 6 external light detection device 9 check table 2A, 2B, 2C, 2D black correction device 4, 5 black approximate data generation device 7, 103 grayscale conversion device 10, 10B, 10D deducted data to calculate the national standard (CNS) A4 of the installed paper ^^ mm ^ 18 18312179 (Please read the precautions on the back before filling this page) Order · Line

499814

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 19 A7 _____B7___ V. Description of the invention (19) 11 Subtraction device 13 Limiter 14 Addition data generation device 15 Addition device 16a Multiplication factor calculation device 17 Multiplication device 18, 18B Minimum value identification Devices 19a to 19f lookup table 20 data selection device 21 minimum value selection device 22 table data writing device 23 adjustment data calculation device 24 maximum value selection device 25, 26 subtraction device 111, 112, 113, 114 black correction sections P, pr , Pg, pb multiplication coefficients Ri, Gi, Bi image data

R1, Gl, B1 input processed data R3, G3, B3 black approximate data R2, G2, B2 black corrected image data R4, G4, B4 subtraction data R5, G5, B5 subtraction data R6, G6, B6 addition The data R7, G7, and B7 are subtracted. The data S also selects the signal Su adjustment data sur, sug, and sub adjustment data. 102 color conversion device 101 pixel number conversion device [best embodiment of the invention] Embodiment 1 FIG. 1 shows the implementation of the present invention. Form 1 is a block diagram showing the structure of an image display device. As shown in the figure, the portrait display device according to the first embodiment is composed of: an input image processing device 1; a black correction device 2A; an image display device 3; and a black approximation data generating device 4, wherein the black correction device 2A and the black approximation The data generating device 4 constitutes a black correction unit 111. This paper size applies to China National Standard (CRS) A4 (210 X 297 mm) 312179 ^ -------- ^ --------- ^ (Please read the notes on the back before filling (This page) 499814 Α7 Β7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (20) The operation of the image display device according to the first embodiment will be described below with reference to FIG. The image data Ri, Gi, and Bi of the three color data input to the image display device are input to the input day image processing device 1. Input image processing device 1 performs input image processing on input day image data Ri, Gi, and Bi, and outputs input processed data R1, G1, and B1 composed of three color data. Here, the input image processing is as described in the background art item (refer to FIG. 30), and performs grayscale correction processing or pixel number conversion processing, and color conversion processing in accordance with the characteristics of the input image data. On the other hand, the 'black approximation data generating device 4 is a black approximation data r3, G3, B3 which holds at least one participating data among the brightness, chroma, and tristimulus values (three types of portrait index values) of the image display device 3 during black display. , To the black correction device 2A. The input of the black correction device 2A 'is processed by the input image processing device 1 and processed by the input images R1, Gl, B1 and black approximation data r3, G3, and B3. The black corrected image data R2, G2, and B2 are calculated and output. The black-corrected daylight image data R2, G2, and B2 output from the black-correction device 2A are sent to the image display device 3 in turn. In addition, the term "black-correction" in this specification refers to the correction of black reproducibility and is used for The general term for the correction of "black floating" affected by external light and the "black floating" due to the characteristics of the image display device. "Black floating" refers to the phenomenon that black is not originally black and has a bright gray shape. The black contrast causes the image contrast to decrease, giving the viewer the impression that the overall image is whitish. That is, "black correction" refers to the brightness or tristimulus value of the paper when it is greatly affected by external light through image signal processing or when the image display device is displayed in black. This paper is a national standard (CNS> A4 specification) (2l0 χ 297 Male 20 312179 (Please read the precautions on the back before filling this page) · • Line-

499814

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (21) When it is large, the brightness, chromaticity, or tristimulus value of the color displayed by the day-image display device is less affected by external light or displayed on the portrait. The brightness or tristimulus value when set to black display is the same. υ The image display device 3 emits light according to the values of the image data R2, G2, and B2 after the black correction of each day element, and performs day image display processing on a predetermined screen. Here, the image display device 3 may be a liquid crystal panel or a CRT: Fig. 2 is a block diagram showing an example of the internal configuration of the black correction device shown in Fig. I. As shown in the figure, the black correction device 2A is composed of a subtraction data device 10, a subtraction device 11, and a limiter 13. The operation of the black correction device 2A will be described below with reference to FIG. 2. The black approximation data R3, G3, and B3 of the positive device 2A are rounded to the ^ calculator ^ calculation device10. The subtraction data calculation device 1G calculates the subtraction data R4, G4, b "from the data. = The subtraction data calculation device 10 used in the implementation of Form 1 is to use the black near R3, G3, and B3 as subtraction data. , B ..., minus; ==, 10 can also be composed of hardware or software, and output the black approximation data R3, J = as the reduction data R4, G4, B4. B3 will be processed in turn according to the 11 reduction unit The subsequent portraits and reduction data R4, G4, and B4 are rotated in, and the following formula two is used: 1 .-- Simplified and early reduction processing, then the reduced data R5 and G5 can be calculated and implemented. Furthermore, the reduction device U is Existing reducers, etc., can be implemented by software. The composition of the body 'or R5 = R1-R4 National Standard (CNS) A4 rule mm of private paper rule "21 312179 I — (Please read the precautions on the back first (Fill in this page again) *., Line · 499814 Α7 Β7 V. Description of the invention (22) G5 = G1-G4. &Quot; (6) B5 = B1-B4 (Please read the notes on the back before filling this page) From The reduced data R5, G5, and B5 output by the reduction device 11 are rounded to the limiter 13. The limiter 13 stores the reduced data R5, G5, and B5 to Negative data is "0", and data with a value above "0" is output as black corrected data R2, G2, and B2. Here, the black approximate data R3, B3 will be described. The black approximate data R3, G3 , B3 is the data calculated by the brightness or chromaticity of the self-portrait display device 3 during black display. The brightness or chromaticity during black display is the brightness or chrominance during black display when there is no external light, and The participation of the brightness or chromaticity of the reflected light of the external light. The brightness or chromaticity of the black display in the state without the influence of the external light is determined by the characteristics of the day image display device 3. The brightness or The chromaticity is determined by the brightness or chromaticity of the light irradiated to the outside of the image display device 3. The employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs has printed black input to the image display device 3 without the influence of external light. When the rear data is R2, G2, and B2, the three stimulus values (hereinafter referred to as tristimulus values) of the colors (lights) displayed on the image display device 3 according to the CIE XYZ color system are XI, Yl, and Z1. For the image display device 3. Input the black correction day image data R2. The relationship between the sizes of G2 and B2 and the three stimulus values XI, Yl, and Z1 of the displayed color (light) can be imagined as the image display device 3 represented by the following formula (7). Here, the three stimulus values correspond to brightness and Chromaticity, and γ1 in the tristimulus value is equivalent to the brightness value. The paper standard National Standard (CNS) A4 specification (210 $ 7 public) Yili 22 312179 499814 A7 B7 V. Description of the invention (23

Nil 1 / / XYZ, axr axg axl ayr ayg ayl azrazgazl)) V) R2 f \ Xbkl > G2 + Ybkl > B2 Zbkl, / • ⑺ iyr, azr, axg, ayg, azg, axb, ayb, Zbkl system Depending on the characteristics of the image display device 3, Ybkl, Zbkl are in the state without the influence of external light. In formula (7), axr ,; azb, and Xbkl, Ybkl, are the values, especially Xbkl, and the black of the image display device 3. During display, that is, when R2 = G2 = B2 = 0, the color (light) stimulus value displayed on the image display device 3. Here, axr, ayr, azr, axg, ayg, azg, axb, ayb, azb are the values shown in the following formula (8) 0 (Please read the precautions on the back before filling this page) Employees of the Intellectual Property Bureau of the Ministry of Economic Affairs Consumption cooperative prints axr = 0.4124, axg = 0.3576, axb = 0.1805, ay r == 0 · 2126, ay g = 0 · 7152, ayb = 〇 · 7222, * · (8) azr = 0.0193, cause zg = 0.1192, azb = 0.9505 Furthermore, the input processed data R1, Gl, and B1 output from the input image processing device 丨 are integers, and the values are in the range represented by the following formula (9). R1 ^ 100 O ^ Gl ^ 100 ... (9) B1 ^ 100 In addition, external light is irradiated to a predetermined screen surface of the image display device 3, and the external light is reflected on the surface of the image display device 3 and the reflected light is generated Set the tristimulus value of X2, X2, Z2. At this time, the three stimulus values X3, Y3, and Z3 of the eyes of the viewer of the display device of the human portrait display device can be displayed on the portrait display device 3 after the color correction data R2, G2, and B2 are black-corrected. China National Standard (CNS) A4 specification (210 X 297 male f) " " --- 23 312179 A7 V. Description of the invention (24) Values XI, Y1 Z1 and the three stimulus values χ2 of the above reflected light are expressed . That is, X3, Y3, and Z3 are represented by the following formula (10). For viewers, the colors displayed by X3, Z3, and Z3 are as if displayed on the image display device 3. Χ3 Υ3 ZO3 XI Υ1 ZO1 χ2 Υ2 ZO2 axr axg axb ayr ayg ayb azr azg a zb R2 G2 B2

Xbkl + X2 Ybkl + Y2 Zbkl + Z2 / • (10) Printed by Formula (10), Xbkl + X2, Ybkl + Y2, Zbkl + Z2 is an image display device considering the influence of external light Three blacks show three stimulus values. From formula (10), the change in the three stimulus values xbki, Ybki, and Zbki when the black display is in the state without the influence of external light, and the change in the three stimulus values χ2, Y2, and Z2 with external light reflected light. The three stimulus values X3, Y3, and Z3 that are reflected in the eyes of the viewer have the same effect. In this embodiment, the influence of the three stimulus values X2, Y2, and Z2 of the external light reflected light is corrected. Here, let Xbkl, Ybkl, and Zbkl be the values shown in formula (11). Xbkl = l Ybkl = l. &Quot; (ll) Zbkl = l Affected by the three stimulus values X2, Y2, and Z2 of the external light reflected light When the black correction device 2A is used for correction, the three external stimuli of the external light reflected light can be considered The values X2, Y2, and Z2 are due to the imaginary light emission in the image display device 3. At this time, the black approximate data R3, G3, and B3 become the above-mentioned imaginary light emission. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 24 312179 (Please read the precautions on the back before filling in this page)

499814 A7 V. Description of the invention (25) And input the data of day image display device 3. Here, the black-corrected post-day image data R2, G2, and B2 input to the day-image display device 3 without the influence of external light are specifically used as the black-corrected post-day image data R2, 0, 20, and B20. The tristimulus value of the color (light) displayed on the image display device 3 under the influence of external light is based on the formula (7) where the black corrected image data R2, G2, β2 and the black corrected day image data R20, G20 The following formula (12) replaced by B20 represents XI Y1 Z1 azr / \ R20 Xbkl ί G20 + Ybkl 1 Β20 Zbkl, / • (12) and 'three stimuli of the above-mentioned external light reflected light under the influence of external light The values X2, Y2, and Z2 can be regarded as the following formula (13) due to the imaginary light emission due to the black approximate data R3, G3, and B3 of the day image display device 3. I score, so the above (10) can be rewritten \ \ S3 3 3 / • χγζ '\, 1 11 I / X γ z χγζ axr axg ayr ay§ a 2 raz £ rr V ί R20 + R3 f \ Xbkl > G20 + G3 + Ybkl > / Β20 + Β3 \ > Zbkl \ y • (13) --I ^ ---------------- ^ (Please read the note on the back first Please fill in this page for further information.) The consumer cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs can print the following formula (14) from formula (12) and formula (13): S3 3 3 / VRGB, axr axg axb ayr ayg ayb azrazga zb

/-\ 2 2 2 / XY ZS • (14) Therefore, using formula (14), the black approximation can be obtained from the three stimulus values X2, Y2, and Z2 of the reflected light from the external light on the surface of the predetermined screen of the image display device 3. ^ —.—____ The scale applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 25 312179 499814 Α7-Β7 V. Description of the invention (26) Data R3, g3, B3. When X2, Y2, and Z2 are obtained by measurement, the black approximate data R3, (j3, B3) can be calculated from equation (14), and the black approximate data generating device can be set. The tristimulus value indicates the chromaticity of the light and The value of brightness. Here, when the black approximate values R3, G3, and B3 are input to the image display device 3, the three stimulus values χ31, γ31, and ζ31 of the displayed color are in the above formula (10), when R2 = R3 X3, Y3, and Z3 when G2 = G3 and B2 = B3 are expressed by the following formula (14) and (10), and are expressed by the following formula (15): 〆X31 Y31 Z31 \ X2 Y2 Z2 /

Xbkl + X2 Ybkl + Y2 Zbkl + Z2 / (Please read the precautions on the back before filling in this page) (15) Also, the three stimulus values of the day image display device 3 in black display χ3〇, Y30, Z30 In the formula (10), R2 = 0, G2 = 0, and B2 = 0 are obtained, and it is expressed by the following formula (16). / N X30 Y30 Z30

Xbkl + X2 • (16)

Ybkl + Y2

Zbkl + Z2 / Printed by formula (15) and formula (16), black-like data R3, G3, and B3 are input to the book image display device 3 by the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. , Υ3 丨, Z3 丨, and the difference between the three stimulus values χ3〇, γ3〇, and z3〇 when the image display device 3 is displayed in black, becomes the image display device 3 reflects light outside the predetermined screen surface The stimulation value X2, Z2, Z2. On the other hand, when the image display device 3 can only obtain Υ2 indicating the brightness of the two stimulus values X2, Υ2, and Z2 of the light reflection light outside the prescribed screen, this paper size applies the Chinese National Standard (CNS) A4 specification ( (210 X 297 mm) 26 312179 V. Explanation of the invention (27) It can be set by calculating the black approximate data R3, G3, and B3 by formula (14) after assuming the spectral distribution of the reflected light of the external light and obtaining X2 and Z2. Yu black approximation data generating device 4. For example, if the spectral distribution of reflected light from external light is assumed to be equal to the spectral distribution of D65 of a standard light source, then X2 ·· Y2: Z2 = 0.9505: 1: 1.089, and χ2 and Z2 values can be obtained from the γ2 value. However, when the brightness Y2 of the reflected light from the external light is calculated to obtain X2 and Z2, the difference between the actual external light spectral distribution and the assumed spectroscopic knife cloth will be implicated after the black correction. The data is displayed in the chromaticity difference of the color in the image display device 3. Hereinafter, an example of specific effects of the image display device according to the first embodiment will be described. The external light on the surface of the prescribed screen of the daylight image display device 3 has three stimulus values of χ3: = 9.55, we = 10, 23 = 108. At this time, by the formula (14), the black approximation data R3 = 10, G3 = 10, and B3 = ι〇. In the first embodiment, the data for subtraction are based on the approximate data of 04 and black, G3, B3HR4 = R3, G4 = G3, B4 = b3, and umm 11 rounds of subtraction data R5, G5, and B5 can be expressed by the following formula ⑼ means. R5 = Rl-l〇G5 = Gl-l〇. (17) B5 = B 1-10 Here, because the subtraction data R5, G5, pu + μ _ you as B5 after input processing image data IU, G Since B1 is a value less than 10, it is negative to Amazaki. In the limit of 15 to 13, the negative value is replaced with the data R2, G2, and B2 after being processed by g old horse black. The book image in Embodiment 1 of the present invention _ ~ __ = 豕 豕 is not installed, as described above will reduce the paper size ^ ^ national national standards (CNSM4 specifications (210 X 297 male iT " 27 312179 499814 A7 __B7 V. Invention) Explanation (28 Calculation data R4, G4, B4 (= black corrected image data R2, G2, B2) The image data R1, G1, and B1 after input processing are subtracted and the effect of external light is suspectedly removed. Figure 3 In order to show that the portrait display device according to the first embodiment inputs processed image data R1, G1, and B1 under the influence of external light, black supplement | ϊ post-correction data R2, G2, B2, and the color reflected in the eyes of the viewer ( The illustration of the relationship between the three stimulus values X3, Υ3, and Z3 of the CIE XYZ color system of light). Furthermore, in the third figure, the relationship of R1 == G1 = B1 is established, that is, no color data The input to the black correction device 2A is shown in FIG. 3. When the black correction day image data r2 and B2 are input to the image display device 3, they are reflected in the three stimulus values of the color (light) of the viewer's eyes. Corresponding to Υ3 of brightness, r1 == 1〇〇, g1 == 1〇〇, B1 = 10 (when white is displayed), Y3 (Ymax) The ratio is the contrast ratio (Y / Ymax). Figure 4 shows the three stimulus values X3 of the processed image data Rl, Gl, B1 and the color (light) reflected in the eyes of the viewer without the influence of external light. The relationship between Y3, Y3, and Z3 is an explanatory diagram in the form of a table. In addition, when there is no external light effect, the black approximate data is R3 == 〇, G3 = 〇, B3 = 〇. Compare Figure 3 and Figure 3. Figure 4: In the portrait display device of the embodiment! When the processed image data R1, G1, and B1 are darker than the approximate data r3, G3, and B3 (= 1G, 10, and 10), a large value is achieved. Same as the display when there is no external light effect. In general, the black approximation data R3, G3, and B3 are smaller than the input processed image data Rl, Gl, and B1 by a small value of about 1/1, which is implemented according to the present invention. The portrait display device of Form 1 is applicable to most of the 312179 paper standards even under the influence of external light. This paper standard applies to the Chinese National Standard (CNS) A Fauge 297. f) 499814 A7 ___ B7 _ V. Description of the invention (29) Data There can be pictures and other conditions without the influence of external light ^ ^ ^ ^ ^ The mouth search is obvious, and it can provide viewers with large contrast and good visibility. Day image. Furthermore, in the day image display device of Embodiment 1, the brightness of the image display device 3 is not changed, and the data of the S-round day image display device 3 is used for image processing. No cost and power consumption are caused. Such as the increase in the number of years and the reduction in the number of years of durability. In addition, FIG. 5 is a graph showing the relationship between the image data 10, () 1, 81 and the brightness stimulus value Y3 after the input processing. In the figure, the solid line is the portrait display device of the present invention when it is affected by external light. The dotted line is the conventional image display device when it is affected by external light. The broken line indicates the absence of external light. From Figure 5, it can be seen that when the processed image data R1, Gi, and B1 are darker than the approximate data R3, G3, and B3 (= 10, 10, 10), the same value can be achieved when there is no external light effect. display. Implementation of the Bear 2 $ Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs {Please read the precautions on the back before filling this page) In the above embodiment 1, only the three stimulus values X2 and Y2 due to external light reflection are corrected The black approximation data R3, G3, and B3 are set up under the influence of Z2 and Z2. However, when the tristimulus value during black display becomes large due to the influence of external light and the characteristics of the image display device, the black approximation can also be set to reduce its impact. Data R3, G3, B3. Fig. 6 is a block diagram showing the structure of an image display device according to the second embodiment of the present invention. As shown in the figure, the overall configuration of the portrait display device of the second embodiment is the same as that of the above embodiment except that the black approximate data generating device 4 is replaced with the black approximate data generating device 42. The black approximate data generating device 42 The generation is different from R3, G3, and B3 of the black approximation data generating device 4. This paper size is in accordance with Chinese National Standard (CNS) A4 specification dox 4 7 mm) 29 312179 499814 Α7 Β7 V. Description of the invention (30) That is, the black correction device 2A and the black approximation data generating device 42 constitute black Correction section 112. In Embodiment 2, as in Embodiment 1, external light is irradiated on a predetermined screen surface of the image display device 3, and the three stimulus values of the reflected light generated by the external light reflected on the predetermined screen surface of the image display device 3 are X2. , Y2, Z2. At this time, the three stimulus values X3, Υ3, and Zn3 of the eyes of the viewer reflected in the viewing image display device are the three stimulus values XI of the color displayed on the image display device 3 after the data R2, G2, and B2 are corrected by black. , Yl, Z1 and the sum of the three stimulus values X2, Z2, and Z2 of the reflected light. That is, χ3, Υ3, and Z3 can be expressed by the following formula (18). The above operation is the same as the above implementation. (Please read the precautions on the back before filling this page) Permeation state X y z a a a 』V_ \ II N3 3 3 /, x Y z, 彳 RGB, Nb b X yz aaa ggg X y z

Xbkl X2 Ybkl + Y2 Zbkl + Z2 (18), / In formula (18), axr, ayr, azr, axg, ayg, azg, axb, ayb, azb, and Xbkl, Ybkl, Zbkl are dependent daylight display devices The characteristic value of 3, especially when the image display device 3 of Xbkl, Ybkl, Zbkl in the state without the influence of external light is displayed in black, that is, when R2 = G2 == B2 = 〇, the image displayed on the image display device 3 Tristimulus value of color (light). The three stimulus values Xbkl, Ybkl, and Zbkl in black display actually have higher values than 0, but they should be 0 in theory, and smaller values should be used as much as possible. The three stimulus values Xbkl, Ybkl, Zbkl when the black display of the image display device 3 is in the state without the influence of external light, and the influence of the three stimulus values X2, Y2, and Z2 of the external light reflection light. When correcting, black-line ·

Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives. The paper size applies to the Chinese National Standard (CNS) A4 (210 X 297 mm) 30 312179 499814 A7 B7 V. Description of the invention (31) Approximate data R3, G3, B3 can be obtained from Eq. (19) find R3 G3 B3 axr axg axb ayr ayg ayb azrazga zb

Xbkl + X2 Ybkl + Y2 Zbkl + Z2 (19) When the three stimulus values X2, Y2, and Z2 of the external light reflected light are obtained by measurement, the black approximate data R3, G3, and B3 are calculated from equation (19) and set to black The approximate data generating device is sufficient. The tristimulus value is a value indicating the chromaticity and brightness of the light. Here, the three stimulus values χ31, Y31, and Z31 of the colors displayed when the black approximate data R3, G3, and B3 are input to the image display device 3 are in the above formula (18), R2 = R3, G2 = G3, B2 = X3, Y3, and Z3 at B3 are expressed by the following formula (20) from formula (19) and formula (18). / \ X31 Xbkl + X2 Xbkl + X2 Y31 = Ybkl + Y2 + Ybkl + Y2 Z31 \ / Zbkl + Z2 N / Zbkl + Z2, / • (20); ---------- ^ ---- ----- Line (Please read the precautions on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, the three stimulus values X30, Y30, and Z30 of the image display device 3 when displayed in black are at Equation (18) is such that R2 = 0, G2 = 0, and B2 = 0, and the following equation (21) is obtained. / \ X30 Xbkl + X2 Y30 = Ybkl + Y2 Z30 \ / Zbkl + Z2 \ / • (21) From formula (20) and formula (21), black approximate data R3, G3, and B3 are displayed when input to the image display device 3. The three stimulus values of color X3 1, Y3 1, Z3 1, and the three stimulus values of image display device 3 when displayed in black X30, Y30, Z30 This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 male) (%) 31 312179 499814 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. The difference between the invention description (32) is the three stimulus values Xbkl + X2 when the image display device 3 is displayed in black when it is affected by external light , Ybkl + Y2, Zbkl + Z2. On the other hand, in the tristimulus values X2, Z2, and Z2 of the light reflection light outside the prescribed daytime surface of the image display device 3, when only Y2 indicating the brightness can be obtained, the spectroscopic distribution of the reflected light by external light can be assumed X2 and Z2 are obtained, and the black approximate data R3, G3, and B3 are calculated from the formula (19), and then the black approximate data generating device 42 can be set. For example, assuming that the spectral distribution of the reflected light of the external light is equal to the spectral distribution of the standard light source D65, the X2 and Z2 values can be obtained from the Y2 value by using 2: 2 2: 22 = 0.9505: 1: 1.08. However, the brightness of the reflected light from the external light is Υ2. When the spectral distribution of the reflected external light is calculated to be X2 and Z2, the difference between the actual spectral distribution of the external light and the assumed spectral distribution will affect the image data R2 and G2 after the black correction , B2 is the chromaticity difference of the color displayed on the image display device 3. The following is an example of specific effects of the second embodiment. The three stimulus values of the reflected light outside the prescribed screen surface of the image display device 3 are X3 = 9.505, Υ3 = 10, and Z3 = 10.89. In addition, the three stimulus values of the image display device 3 in the black display state without the influence of external light are Xbkl = 10, Ybkl = 10, and Zbkl = 10. At this time, by using formula (19), the black approximation data is R3 = 22, G3 = 19, and β3 = 19. Since R4 = R3, G4 = G3, and B4 = B3 in the open polymorphism in this implementation, the subtraction data R5, G5, and B5 output by the subtraction device 11 are shown in the following formula (22). R5 = Rl-22 G5 = G1-19 ... (22) B5 = B1-19 Degree Applies to Chinese National Standard (CNSM4 Specification (210 X 297 male f)) 32 312179 (Please read the precautions on the back before filling this page )-#-线 _ 499814 Printing of clothing A7 by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the Invention (33) Here, the data after subtraction becomes negative when the data after input processing is less than 22, so The limiter 14 replaces the negative value with, 0, and outputs it as the black corrected image data R2, G2, and B2. In the day image display device according to the second embodiment of the present invention, the image after input processing is as described above. The data R1, Gi, and B1 minus the subtraction data R4, 04, and B4 (= black approximation data R3, G3, and B3), the suspiciousness is removed. The three stimulus values xbu when the image display device is displayed in black without the influence of external light , Ybkl, Zbkl, and the effects of the three stimulus values x2, γ2, and Z2 of the reflected light from external light. Figure 7 shows the daylight image display device of Embodiment 2. The inputted post-daylight image data is processed under the condition of external light. Rl, Gl, Bi, black corrected data R2, G2, B2, and the color (light) reflected in the eyes of the viewer The relationship between the three stimulus values X3, Y3, and Z3 is illustrated in the form of a graph. In Figure 7, the relationship of R1 = G1 = B1 is established, which means that no color data is input to the black correction device 2A. In Figure 7 In the black corrected data R2, G2, and B2, when input to the image display device 3, the three stimulus values that are reflected in the color (light) of the viewer's eyes are equivalent to the luminance stimulus value Y3 of brightness relative to r1 = 1. 〇, the ratio of Y3 (Ymax) when Gl = 100 and Bl = 100 (when white is displayed) is the ratio of contrast ratio (Y / Ymax). Figure 8 shows the black approximate data R3 in the state affected by external light = 〇, G3 = 0, B3 = 0, that is, the three stimulus values X3 of the image data R1, G1, B1 and the color (light) reflected in the eyes of the viewer after the black correction device 2A does not perform input processing. The relationship between Y3, Y3, and Z3 is expressed in the form of a chart ------- I ^ --------- (Please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A '! Specifications (210 X 297 mm) 33 312179 499814 A7 " -------------- __ V. Description of the invention (34) Photograph (please first read Note on the back, please fill in this page again.) Figure 9 shows the image data r1, gi, bi processed by the input processing of the imaginary image display device without xbkl = Ybkl = zbkl = 〇, and reflected to the viewer. The diagrammatic illustration of the relationship between the three stimulus values X3, γ3, and Z3 of the eye color (light). Comparing FIG. 7 and FIG. 9, in the day image display device of Embodiment 2, the processed image data R1, Gi, and Bl are approximated by the darker data R3, G3, and B3 (R3 = 22 'G3 = 19' B3 = 19) When the value is large, there is no external light effect on the tristimulus values X3, Y3, and Z3 'and the display is equivalent to the hypothetical image display device assumed as Xbkl = Ybkl = Zbkl = 0. In general, the black approximation data R3, G3, and B3 are smaller than the input image data R1, G1, and B1. The image display device according to Embodiment 2 of the present invention is affected by external light and the characteristics of the image display device. When both of the three stimulus values in black display become large, the three stimulus values in black display are also equal to many data. When the three stimulus values are in black display, it can have the same display, providing viewers with greater contrast and visibility. Good day image. Fig. 10 is a graph showing the relationship between the printed image data R1, G1, and bi, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and the brightness stimulus value Y3. In FIG. 10, the solid line is ^: both the effect of external light and the characteristics of the image display device, and the black display: the image display device of the present invention when the stimulus value becomes large, and the dotted line is due to external light A conventional image display device that affects both the characteristics of the image display device and the three stimulus values when the black display becomes large. The dotted line indicates that there is no external I effect, and Xbkl = Ybkl = Zbkl = 0. Also, in Embodiment 2, the special paper size of the daylight display device affected by the external light is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 public love) " " ~~ — _ — 312179 499814 Ministry of Economic Affairs Printed by the Intellectual Property Bureau employee consumer cooperative 35 A7 V. Description of the invention (35) When the three stimulus values in black display become larger, set the approximate black data value to the three stimulus value in black display, "0" is used for the same display, but it is not necessary. You can also specify a certain value for the three stimulus values in black display, and the three stimulus values in black display when the black display data value is the same as the specified value The display can be implemented. The implementation form 3 is a block diagram of the black correction device of the day image display device according to the third embodiment of the present invention. As shown in the figure, the black correction device 2B is composed of: the subtractive data device 10 , Subtraction device U, addition data generating device 14 and addition device 15, etc. Among them, the subtraction data calculation device 10 and the subtraction device 11 are the same as the first embodiment shown in FIG. 2. In addition, the black correction device 2A Replace Black Correction Pack Except for 2B, the overall structure is the same as that in Embodiment 1 shown in Figure j. As shown in Figure 11, as in the case of Embodiment 1, the black approximate data R3, G3, and B3 input to the black correction device 2B are rotated. To the subtraction data calculation device 10, and to calculate the subtraction data R4, G4, and B4 in the subtraction data calculation device 10. In the subtraction data calculation device 10 of this embodiment, as in the above embodiment, the black approximation data is also used as Subtraction data output, that is, R4: = R3, G4 = G3, B4 = B3. The subtraction device u takes as input the day image data R1, G1, B1 and subtraction data R4, G4, and B4 as input, and then performs subtraction Calculate and output the reduced data R5, G5, and b5. The addition data generating device 14 is the input of the reduced data R5, G5, and B5 output from the subtracting device ^, which occurs relative to the reduced data R5, 312179 ----- --- ^ ----—--- ^ (Please read the notes on the back before filling this page) 14 14 A7 B7

V. Description of the invention (36) The data for the addition of the two values of 5 are to be used here ... When the data R5, G5, and B5 after subtraction are above the specified threshold, the data for addition r6, (Please read the precautions on the back first (Fill in this page again.) The value of B6 is, 0 ". The addition data generation and installation i14 can be realized by a lookup table with memory function. The addition device 15, which is input from the addition device u rounded down data R5 , G5, B5 and addition data R6, G6, and B6 are calculated by the following formula to calculate the black-corrected data R2, G2, and B2. In addition, the addition device 15 may be constituted by hardware such as an existing adder, or Software composition: Yes. R2 = R5 + R6 G2 = G5 + G6 ... (23) B2 = B5 + B6 Embodiment 3 is the same as Embodiment 1. The light reflected by the light outside the prescribed daylight surface of the image display device 3 The tristimulus values are χ3 = 9 505, Υ3 = 10 ', Zn3 = 10 · 89. At this time, the black approximation data is R3 =: 10, g3 = 10, and B3 = 10. In this embodiment, Since R4 = R3, G4 = G3, B4 = B3, the subtraction data R5, G5, and B5 output by the subtraction device 11 are as shown in equation (24). Member of the Bureau of Intellectual Property, Ministry of Economic Affairs Printed by the consumer cooperative R5 = R1-10 G5 = G1-10 ... (24) B5 = B1-10 Figures 12 (a) to 12 (b) are the coordinates of the relationship between the reduced data and the added data As shown in the figure, the addition data generating device 14 corresponds to the values of the reduced data R5, G5, and B5 to generate the added data R6, G6, and B6. For example, when the reduced data R5 is 10 or more, R6 = 〇 The paper size of the paper is subject to the Chinese National Standard (CNS) A4 (210 X 297 mm) 36 312179 499814 A7

'Printed by the Ministry of Economy-Intellectual Property Bureau-Employee Consumer Cooperatives V. Description of the invention (37)-After data R5 = 0, R6 = 5, and after reduction data R5 = 10, R6 = 10. FIG. 13 is a day image display device according to this embodiment, in which image data R1, G1, B1, black-corrected data R2, G2, B2, and color reflected in the eyes of a viewer are input after being affected by external light (FIG. The relationship between the three stimulus values X3, Y3, and Z3 is illustrated in the form of a graph. Yudi! 3 In the figure, "RhGbm relationship must be established", that is, the case where achromatic data is input to the black correction device 2B. In Figure 13, the black-corrected post-day image data R2, G2, and B2 are input to the day-image display device 3_, which reflects the three stimulus values of the color (light) of the viewer's eyes according to the color system of CIEXYZ. The ratio of R1 = 100, G1 = 100, and B1 = 100 (in white display) to Y3 (Ymax) at the brightness of Y3 is expressed as the contrast ratio (Y / Ymax). In the image display device of the third embodiment, the processed image data R1, G1, and B1 are black approximation data R3, G3, and B3 (R3 == 1〇G3 = i〇, B3 = 10). When the value is large, the display is equivalent to that when there is no external light effect. Generally, the black approximation data R3, G3, and B3 are more than a small value of ι / 10 of the image data R1, Gl, and B1 after the round-in processing. According to the present invention, the image display device of the > state 3 is implemented. When it is affected by external light, a larger proportion of data can also have the same display as when it is not affected by external light, and it can provide a daylight image with large contrast and good visibility to the viewer. Furthermore, in the portrait display device according to the embodiment, the processed image data R1, Gl, and B1 will have a "black burst" phenomenon with a certain brightness in the areas below the black approximate data R3, g3, and B3. In the portrait display device of the third embodiment, the addition data generating device 14 generates addition data R6, G6, and β6 based on the portrait data R1, Gl, and B1. Therefore, the Chinese national standard (cns) a is not applicable to this paper size. :! 规-^-一 — __. Thread 37 312179 499814 A7 V. Description of the invention (38) c Please read the phonetic notation on the back? Please fill in this page again. In addition, in the portrait display device of the third embodiment, the range of the image data R1, G1, and B1 after the input processing to achieve the same display without being affected by the external light is due to the content of the addition data generated by the addition data generating device 14. different. Fig. 14 is a graph showing the relationship between the image data IU, Gl, B1 and the luminance stimulus value Y3 after the input processing. In the figure, the solid line is an image display device according to the third embodiment of the present invention when it is affected by external light, a dotted line is a conventional image display device when it is affected by external light, and the dotted line is a case without external light. Furthermore, in the third embodiment, when the external light is affected, a black approximate data value is set for the same display as when no external light is affected, but by applying the idea of the second embodiment, the effect of light is excluded When the stimulus value in black display becomes larger due to the characteristics of the image display device, the black approximation data can also be set to have the same display as when the three stimulus values in black display are zero. Implementation Form 4 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy FIG. 15 is a block diagram showing a configuration example of a black correction device of an image display device according to Embodiment 4 of the present invention. As shown in the figure, the black correction device 2C is composed of a nose reduction data calculation device 10B (multiplication coefficient calculation device, multiplication device 17) and a reduction device 11. The subtraction device u is the same as the first embodiment shown in FIG. 2. In addition, except that the black correction device 2A is replaced by the black correction device 2 C, the overall structure is the same as the embodiment j shown in FIG. Similar to the first embodiment, the black approximation data input to the black correction device 2C

38 312179 39 499814 V. Description of the invention (R3, G3, and B3 are input to the reduction data calculation device 10B, and the reduction data out of the device 10B is used to output the reduction data r4, G4, and B4. The reduction data calculation device 10B is provided by The multiplication device 17 and the multiplication coefficient calculation device 16a are composed of the multiplication coefficient calculation device i6a, which inputs the image data R1, Gl, B1 and the black approximate data ruler 3, (} 3, B3, etc.) after the input processing. Multiplying coefficient p is calculated and output from the data. Multiplier 17 is input multiplying coefficient p ′ and black approximation data R3, G3, and B3 output from the multiplying coefficient calculating device, which are processed by nose multiplication as shown in the following formula (25). Nasal reduction data R4, G4, B4. In addition, the multiplication device 17 may be composed of existing hardware such as a multiplier, or may be composed of software. R4 = p · R3 G4 = p · G3 .. (25) B4 = p · B3 The reduction device 11 inputs the input processed data RbGi'Bi and the reduction data R4, G4, and B4, and calculates the black-corrected data R2 and G2 through the reduction processing shown in the following formula (26). , B2 and output. R2 1 -R4 G2 = G1-G4 ... (26) B 21 -B 4 Figure 16 shows the multiplication coefficient calculation device 16a. A block diagram of an example of the component structure. As shown in the figure, the multiplication factor calculation device 16a is composed of a minimum value discrimination device 18, a lookup table 19a to 19C, a data selection device 20, and a subtraction device 25. Image data R1, G1, Bi and black approximation data R3, @ a (CNS) A4 (210 X 297 312179 I) after input processing ^ -------- --------- (Please read first (Notes on the back then fill out this page)

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 39 499814 A7 _ B7 V. Description of Invention (40) (Please read the precautions on the back before filling this page) G3 and B3 are input to the deduction device 25. The subtraction device 25 calculates the subtraction data R7, G7, and B7 through the subtraction processing of the following formula (27). The reduction device 25 is similar to the reduction device 11 and can be implemented by hardware or software. R7 = R1-R3 G7 = G1-G3 ... (27) B7 = B1-B3 The reduced data R7, G7, and B7 output by the reduction device 25 are input to the minimum value discrimination device 18. The minimum value discriminating device 18 discriminates which of the data R7, G7, and B7 is the smallest after the subtraction. The discrimination result is output as a selection signal S. As for the minimum discrimination device 18, it can be realized by any hardware or software. On the other hand, the processed image data R1, G1, and B1 are also input to the lookup tables (LUT) 19a, 19b, and 19c, respectively. Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the search form 19a takes the input processed image data ri as an address, and stores the corresponding multiplication coefficients in advance. Therefore, the lookup table 19a outputs a multiplication coefficient pr (< l) corresponding to the value of the day image data ri after the input processing. The lookup tables 19b and 19c are also the same. The lookup table i9b outputs the multiplication coefficient pg (< i) corresponding to the value of the image data G1, and the lookup table i9e rounds out the multiplication coefficient pb (<; l). The multiplication coefficients pr, pg pb output from the lookup tables 19a, 19b, and 19c are input to the data selection device 20. In the data selection device 20, the selection signal s of the minimum value discrimination device 18 is also input. The data selection device 20 selects a multiplication coefficient 1) from the multiplication coefficients pr, pg, and pb of the candidates of the multiplication coefficient P according to the content of the selection signal s, and outputs it. (cns) A4 (210 χ 297 Γ 40 312179 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 499814 V. Description of the invention (4i) As for the data selection device 20, it can be implemented by any hardware or software. The coefficient calculation device 16a 'calculates the multiplication coefficient ρ as described above and outputs it. Here is an example of the multiplication coefficients pr, pg, and pb stored in the tables 19a, 19b, and 19c. The day image display in Embodiment 4 will be described below. The device uses the image data R1, Gi, and bi processed by the input reduction device 11 to subtract and subtract the data R4, G4, and B4 to calculate the black-corrected data R2, G2, and B2 as described above. In theory, the reduction The data R4, B4 should be equal to the black approximation data R3, G3, and B3. However, the 'black approximation data R3, G3, and B3 are data related to the height, chroma, or tristimulus value of the image display device 3 when displayed in black. It does not change due to the input of processed image data R1, G1, B1. Therefore, when the subtraction data R4, G4, B4 and black approximation data R3, G3, B3 are equal, such as input processed image data R1, G1 , B1 value is darker approximate data R3, G 3 If B and 3 are small, the data after black correction will have negative values. Therefore, if the processed image data R1, G1, and B1 are small, multiplication coefficients pr, pg, and pb that are smaller than 1 will be multiplied by the black approximation data. R3, G3, and B3 become reduction data R4, G4, and B4, and can prevent negative values of black-corrected data R2, G2, and B2 from occurring. Figure 17 shows an example of the relationship between the image data after input processing and the black-corrected data. Coordinate graph. Consider the case where the input processed image data R1 and black-corrected data R2 are stored in the lookup table 19a as a multiplication coefficient pr. The relationship shown in FIG. 17 is stored. At this time, R2 can be expressed by the following formula (28) said. The M's scale is applicable to China National Standard (CNS) A4 specification (210 x 297 mm) 312179 ---- M ------------ 111 ^. {Please read first Note on the back, please fill out this page again.) • (28) 499814 A7 42 V. Description of the invention (R1 g 2 * R3 at R1 < 2 · R 3 at R2 = ri — R3 R2 = pregnancy reduction data R4 series The difference between the black-corrected data R2 and the day image data R1 after input processing is expressed by the following formula (29): R1 2 for R2 2-R3 < R4 for 2-R3 == R3 R1. • (29) 2 again 'The multiplication coefficient PΓ is the ratio of the subtraction data R4 to the black approximation data, which can be obtained by the following formula (30). The above is the description of the multiplication coefficient pr, and the multiplication coefficients pg and pb are the same. R1 2 2 · I13 Time Rl < 2 -R3 Time P: R1 " (30) (Please read the notes on the back before filling in this page) Order: 2 -R3 In the fourth embodiment, the image data R1 has been processed after the rotation , Gi, m subtracted black approximated data R3, G3, B3 The reduced data R7 G7 B7 minimum value 'is discriminated by the minimum value discriminating device 18 The discrimination result by the minimum value discriminating device 18 is constructed by the data selection device 2 The multiplication coefficient P can be selected on k. In this way, by using the discrimination result of the minimum value of the reduced data R7, ⑺ B = 7, the smallest of the multiplication coefficients Pr, pg, and pb can be selected as the multiplication coefficient P. Therefore, the value of i is selected as the multiplication coefficient 经由 through the multiplication coefficients Pr, pg, and p, and the negative values of the data R2, G2, and B2 after the black correction can be reliably prevented. ^ The image display device of Embodiment 4 is printed by the external light and is printed on line 312179 of the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs.

42 43 499814 V. Description of the invention (In the state of input processing, the portrait data R1, G1, B1, the black corrected data R2, G2, B2, and the tristimulus value of the color (light) reflected in the viewer's eyes are magic, Υ3, The diagram of the relationship between Z3 is illustrated in the form of a graph. In the first & diagram, the relationship of R1 = G1 = B1 is established, that is, the achromatic data is input to the black correction device 2. In the eighteenth diagram, each of R2, G2, and B2 is input. At the time when the image display device 3 is reflected in the tristimulus value of the color (light) of the viewer's eyes, ri = ioo, gi = i〇〇, bi = ioo (when white is displayed), and Y3 (Ymax The ratio of) is expressed as the contrast ratio (Y / Ymax). Here, as in Embodiment 1, the tristimulus value of light reflection light outside the prescribed screen surface of the image display device 3 is set to χ3 = 9 · 505, Y3 = i〇, Zn3 — 10.89. At this time, the black approximation data is R3 = i〇, G3 = i〇, B3 = l〇. In the day image display device of Embodiment 4, the processed image data IU and G are input. When the darker approximate data of Β1, R3, G3, and B3 (R3 = 10, 〇3 = 10, B3 = 10) is a large value, when no external light effect is achieved Equivalent display. In general, the black approximation data R3, G3, and B3 are larger than when the processed image data R1, G1, and B1 have a small value of about 1/1. The image display according to Embodiment 4 of the present invention is more Even when the device is affected by external light, a larger proportion of data can be displayed on the same level as the state without external light, and it can provide a viewer with a large contrast and good visibility. Also, in the first embodiment described above, In the image display device, the processed day image data R1, G1, and B1 are input, and there will be a "black burst" phenomenon with a constant brightness in the areas below the black approximation data R3, g3, and B3. The device is calculated by subtracting data. The device 10B is based on the number of portrait papers and the paper size applies the Chinese National Standard (CNS) A "Specifications (21G X 297 public" 312179 I M -------- t ------ --- line (please read the precautions on the back before filling this page) 43 499814 A7 _____ B7 V. Description of the invention (44) Calculate the deduction data R4, G4, B4 based on R1, G1, and B1 without causing "black rupture" In addition, in the image display device of Embodiment 4, when there is no external light effect The range of the day image data R1, G1, and B1 after the input processing of the display is different depending on the contents of the multiplication coefficients pr, pg, and pb remaining in the lookup tables 19a, 19b '19c. Figure 19 shows The coordinate graph of the relationship between the processed image data R1, G1, B1 and the brightness stimulus value Y3 is input. In this figure, the solid line is the image display device according to the fourth embodiment of the present invention when it is affected by external light, and the dotted line is the subject. The conventional image display device when external light is affected, and the dotted line is when there is no external light. Also, when the fourth embodiment is affected by external light, a black approximation value is set in order to achieve the same display as that without external light. However, by applying the idea of the second embodiment, the external display can also be used for image display in addition to external light. When the three stimulus values in the black display become large, the black approximation data is set to achieve the same display as when the three stimulus values in the black display are 0. Embodiment 5 FIG. 20 is a block diagram showing a configuration example of a black correction device of an image display device according to Embodiment 5 of the present invention. As shown in the figure, the black correction device 2D is composed of a subtraction data calculation device 10C (multiplication coefficient calculation device 16b, multiplication device 17) and a subtraction device 11. In this figure, the subtracting device 11 and the multiplying device 17 are the same as the fourth embodiment shown in FIG. 15, except that the black correction device 2A is replaced by the black correction device 2D, and the overall structure is as shown in FIG.实施 例 1。 Embodiment 1. As in the fourth embodiment, the black approximation data R3, G3, and B3 input to the black correction device 2 C are input to the subtraction data calculation device 10C 'for subtraction (please read the precautions on the back before filling this page). The paper size printed by the Intellectual Property Bureau's Consumer Cooperatives applies the Chinese National Standard (CNS) A4 specification C210 X 297 mm. 44 312179 499814 A7 45 V. Description of the invention (The calculation device 1GC calculates the subtraction data R4, G4, B4. The subtraction data calculation device ioc is composed of a multiplication device 17 and a multiplication coefficient calculation device. The multiplication coefficient calculation device inputs day image data Ί1 and B1 after input processing to calculate a multiplication coefficient ?. Multiplication device 17, system The multiplication factor p ′ and the black approximation data R3, 〇3, and B3 output by the multiplication factor calculation device are rotated, and the subtraction data R4, G4, and B4 are calculated by the multiplication processing. The subtraction device 11 inputs the processed data R1 , G1, B1, and subtraction data R4, G4, and B4 are used as inputs, and the black-corrected data R2, G2, and B2 are calculated and output after subtraction processing. Subtraction device 11 and multiplication device 17 are processed as in Embodiment 4. Fig. 21 is a block diagram showing a configuration example of a multiplication factor calculation device shown in Fig. 20. As shown in the figure, the multiplication coefficient calculation device 16b is composed of: a minimum value discrimination device 18B; a reference table 19a to 19c; and The data selection device 20 is configured. The lookup tables 19a to 19C and the data selection device 20 are the same as those in the fourth embodiment shown in FIG. 16. In the fourth embodiment, the processed day image data R1, The difference between B1 and the black approximation data R3, G3, and B3 is input to the minimum value discriminating device 18, and the minimum value discriminating result is used to form a multiplication coefficient ρ selected from the multiplication coefficients, μ, and pb. On the other hand, in The minimum value discrimination device 18B of the multiplication coefficient calculation device 16b of the fifth embodiment inputs the processed image data R1, B1, and uses the minimum value discrimination result to multiply the multiplication coefficient ρ from the multiplication coefficients pr, pg, The selection signal S selected in pb is rounded. As for the minimum value discriminating device 18B, it may be composed of hardware or software. In addition, the multiplication coefficient is calculated ^ -------- ^ --------- (Please read the notes on the back before filling this page) Intellectual Property Bureau of the Ministry of Economic Affairs_ Printed by the employee ^ Cooperative society ^ Paper size is applicable to Chinese National Standard (CNS) A4 specification UlO X 297 ^^ 7 45 312179 499814 A7 __ B7 V. Description of the invention (46) The structure other than device 16b is the same as figure J 6 The illustrated embodiment is omitted here, and detailed description is omitted. With the multiplication factor calculation device 16b of the fifth embodiment, there is not much difference between the black approximation data R3, G3, and B3, as in the multiplication coefficient calculation device 16a of the fourth embodiment. After the black correction, the data r2, G2, and B2 can prevent negative values from occurring. Therefore, according to the image display device of Embodiment 5 of the present invention, when exposed to external light, it can also display a larger proportion of data in a state without the influence of external light, providing viewers with a large contrast and good visibility. Day image. In the image display device _ of the first embodiment, when the day image data R1, G1, and B1 after input processing are black approximate data R3, G3, and B3, there will be a phenomenon of "black burst" in which the brightness becomes constant. In the image display device of the fifth embodiment, by storing an appropriate multiplication factor in the look-up table, it is possible to suppress the "black burst" phenomenon. In addition, in Embodiment 5, the thinking method of Embodiment 2 can be used to set the approximate data of w. In addition to being affected by external light, the tristimulus value during black display becomes large due to the characteristics of the image display device. The display is the same as when the tristimulus value is 0 when the display is black. f. Embodiment 6 FIG. 22 is a block diagram showing a configuration example of a multiplication system and a number calculation device in an image display device according to Embodiment 6 of the present invention. As shown in the figure, the multiplication factor calculating means 16C is composed of lookup tables 19a to 19c and a minimum value selecting means 21. The reference tables 19a to 19c are the same as those of the fourth and fifth embodiments shown in Figs. 16 and 21. In addition, the black correction device 2 is based on the Chinese paper standard (CNS) A4 (210 X 297 mm). 'Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 47 499814 A7 -------- V. Description of the invention (47) ~-The components in the above are the same as those in the fifth embodiment shown in FIG. 20 except that the multiplication coefficient calculation device 16b is replaced with the multiplication coefficient calculation device 16C. In addition, the black correction device 2A is replaced with a black correction device 2D, and the overall configuration is the first embodiment as shown in Fig. 1. ~ As shown in Figure 22, the processed image data Rl, Gi, and 扪 are input to the lookup tables 19a, 19b, and 19c, and the multiplication coefficients corresponding to the input processed image data Rl, Gl, and B1 values are output. The processing of pr, pg, and pb is the same as that of the fifth embodiment. The self-examination tables i9a, 19b, and 19C round the multiplication coefficients pr, pg, and pb to the minimum value selection device 21, take the small value selection device 21, and use the minimum value of the nose multiplication coefficients pr, pg, and pb as Multiplication coefficient P is output. The minimum value selecting device 21 may be constituted by hardware or software. In the multiplication coefficient calculation device 16c of the embodiment, the minimum value of the multiplication coefficients pr, pg, and pb is output as the multiplication coefficient p. Therefore, negative values of black correction data R2, G2, and B2 can be prevented. If so, the portrait display device according to the present invention, even when affected by external light, can display a larger proportion of data with the same status as the state without external light, and provide viewers with a large contrast and good visibility . Moreover, in the day image display device that implements the > state 1, after input processing, the day image data R1, Gl, and B1 will have a "black burst" phenomenon with a certain brightness in the areas below the black approximate data r3, G3, and B3. However, in the image display device of Embodiment 5, the lookup table stores appropriate multiplication coefficients, which can suppress the "black burst" phenomenon. In the sixth embodiment, the thinking method of the second embodiment is applied. The paper size is applicable to the Chinese National Standard (CNS) A4l (210 X 297 mm) ^-312179

It III — — — — · IIIII ϊ! Illnll ilt (Please read the precautions on the back before filling out this page) 499814 A7 V. Description of the invention (48) Approx. When the tristimulus value becomes large due to the characteristics of the device, a display equivalent to that when the stimulus value is 0 in black display can also be achieved. Seventh Embodiment Fig. 23 is a block diagram showing an example configuration of an image display device according to a seventh embodiment of the present invention. As shown in the figure, the input image processing device, the black correction device 2A, the image display device 3, and the black approximation data generation device 4 are all the same as the embodiment shown in FIG. 丨! In the same case, only the difference between the black approximation data calculation device 5 and the external light detection device 6 is different from the embodiment. That is, the black correction unit 113 is composed of a black correction device 2A, a black approximation data generating device 4, a black approximation data calculation device 5 and an external light detection device 6. The external light detection device 6 detects the tristimulus values X4, Y4, and Z4 of light irradiated onto the surface of the daylight image display device 3, and inputs the black approximation data calculation device 5 as external light detection data. The black approximation data calculation device 5 inputs the three stimulus values X4, Y4, and Z4 of the external light output from the external light detection device 6, calculates the black approximation data r3, 03, and B3, and calculates the black approximation data R3, G3, and B3. It is set in the black approximation data generating device 4. On the other hand, image data Ri, Gi, and Bi made of three-color data input to the day image display device are input to the input image processing device 1. The input image processing device 1 performs input image processing on the input image data Ri, Gi, and Bi, and outputs the input image data R1, G1, and B1, which are three-color data. Here, the input image processing is a tone correction process, a pixel number conversion process, a color conversion process, and the like according to the characteristics of the input image data. Black approximation (please read the precautions on the back before filling this page) Binding ---------: Line-Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives Paper size applies to Chinese National Standards (CNS) A4 specifications (21 × X 297 mm) 48 312179 499814 Μ Printed by the Consumers ’Cooperative of the Ministry of Economic Affairs Intellectual Property Bureau A7 B7 V. Description of the invention (49) The data generating device 4 maintains the black approximation data calculation device 5 The approximation data set by the seal R3, G3, and B3 generate the black approximation data R3, G3, and B3 and output to the black correction device 2A. The black correction device 2A takes as input the image data ri, Gl, B1, and black approximate data R3, G3, and B3, and calculates the black corrected data R2, G2, and B2, and outputs it. The black-corrected data R2, G2, and B2 output from the black-correction device 2A are transmitted to the day image display device 3. The image display device 3 'emits light in accordance with the image data, G2, and B2 after black correction for each pixel, and can display an image. Here, the portrait display device may be a liquid crystal panel or a CRT. The processing for calculating the black-corrected data R2, G2, and B2 in the black-correction device 2a is the same as that in the first embodiment, and a description thereof will be omitted. In addition, the black correction device 2A may be implemented in the configurations shown in the second to sixth embodiments. Here, in the black approximation data calculation device 5, the process of calculating the black approximation data R3, G3, and B3 from the external light triplex values X4, Y4, and Z4 will be described. In the black approximation data calculation device 5, first, the tristimulus values χ2, Υ2, and Z2 of the light reflected by the image display device 3 outside the predetermined screen surface are calculated from the external light tristimulus values χ4, Υ4, and Z4. For the calculation of the three stimulus values X2, Z2, and Z2 of the external light reflected light, data such as the reflectance or spectral reflectance characteristics of the prescribed screen surface in the image display device 3 can be used. For example, in the daylight image display device 3, the reflectance of the screen surface is specified as al, and light of all wavelengths is evenly reflected '. The tristimulus values X2, Y2, and Z2 of the external light reflected light can be calculated by the following formula (31). X2 = al · X4---- ^ --------- I i n-^ ---- $ (Please read the precautions on the back before filling out this page) This paper is applicable to Zhongguanjia Standard (CNS) A4 specifications (21Q χ Norwegian public hair) 49 312179 499814 A7 ____ _B7 -------------- V. Description of the invention (50) Y2 = al · Y4 ... ( 31) · Z4 ------------- «M i — (Please read the precautions on the back before filling in this page) Secondly, calculate the tristimulus value X2 of the reflected light from outside. Y2 and ζ2 calculate the black approximate data R3, G3, and B3. However, the method of calculating the black approximate data R3, G3, and B3 from the three stimulus values X2, Z2, and Z2 of the external light reflection is the same as that described in the first embodiment. In the image display device of Embodiment 7, the external light detection device 6 detects the tristimulus value of light irradiated to the surface of the image display device and calculates the black approximation data from the detection result. Therefore, it is not necessary to set the black approximation data in advance. Environment, the appropriate black approximation data can be set automatically. Therefore, even when affected by external light, a larger proportion of data can be displayed on a par with the state without external light, providing viewers with a large contrast and good visibility. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In Embodiment 7, the external light detection device 6 detects the three stimulus values of the reflected light as an example of the output of the external light detection data, but the external light detection device 6 only detects the reflection. The brightness of light is also possible. At this time, the detected brightness is output to the black approximation data calculation device 5 as external light detection data. The procedure for calculating the black approximation data from only the brightness is as described in the first embodiment. Embodiment 8 Fig. 24 is a block diagram showing a configuration example of an image display device according to Embodiment 8 of the present invention. As shown in the figure, the input image processing device i, the day image display device 3, and the black approximation data generating device 4 are the same as those in the embodiment i shown in FIG. 1 'instead of the black correction device 2A, a check table 9 and a table are used. The data writing device 22 is different from the first embodiment. That is, by using black approximation data, the paper size applies the Chinese National Standard (cns) A4 specification (210 X 297 mm) 50 312179 499814 M Ministry of Economic Affairs! Printed by the Consumer Property Cooperative of P Hui Property Bureau A7 V. Description of Invention (51) The generating device 4, the reference meter 9 and the table data writing device 22 constitute the black correction section 114. The image display device of the eighth embodiment implements the processing of the black correction device using a lookup table 9. The lookup table writes the split 22 ′, which is the black approximate data R3, G3, and B3 input from the black approximate data generating device 4. The black approximate data R3, G3, and β3 are used to input the data of the processing device R1, G1, and B1. For all combinations (the rounds of any one of the black correction devices in Embodiments 1 to 7), the data R2, G2, and B2 after black correction are calculated in advance. Then, after calculating the black-corrected data R2, G2, and B2, the table data writing device 22 writes the values of the data ri, gi, and the input processing device as addresses, and uses the calculated black-corrected data R2 and G2. The value of is used as the table data TD to write in the reference table 9. For the method of calculating the black corrected data R2, G2, and B2 of the image data R1, G1, and B1 after the input processing, the methods described in the above embodiments can be used. The table data writing device 22 may be configured by hardware or software. The black-corrected data r2, G2, and b2 calculated from the reference table 9 can be realized by fetching the written table data TD. In the look-up table 9, the image data R1, G1 after the input processing of the round-in image processing device 1 is input as the read address, and the table data R2, G2, and 82 stored at the address are used as black corrections. Data output. j Here, when the black-corrected data R2 is only dependent on the input image-processed hologram data R1, and does not depend on the input-processed data G1 and 3, the black-corrected data R2 can be used as the input-processed image data ri Address ^ -------- ^ i II ---- * Line (Please read the precautions on the back before filling this page) This paper size is applicable to National Standard (CNS) A4 (210 X 297) F) 51 312179 499814 A7 B7 5. The 70th check of the invention (52) is calculated with a table. Similarly, when the black-corrected data G2 only depends on the value of the input processed image data 〇1, and does not depend on the input-processed portrait data R1 and B1, the black-corrected data G2 can be based on the input-processed image data G1 only. Calculate the table with a one-time lookup of the address. In addition, after the black corrected data B2 only depends on the value of the day image data B after input processing, and does not depend on the input processed image data IU and G1, the black corrected data B2 can be obtained by only inputting the processed image data B1 as A one-time lookup of the address is calculated using a table. On the other hand, when the black-corrected data R2, G2, and B2 depend on the combined values of the processed image data R1, G1, and B1, respectively, the black-corrected data R2, G2, and B2 can be used as a three-dimensional check of the address. The table calculates the input processed image data R1, Gl, B1. The image display device of the eighth embodiment implements the processing of the black correction device of the first to seventh embodiments by a lookup table, and the circuit configuration is simple. This is because the lookup table uses the image data R1, G1, and B1 as addresses, and can be realized by reading the image data R2, 02, and B2 after the black correction. In addition, by using the lookup table, the table contents can be freely set and the degree of freedom can be improved, and the table contents can be replaced and the processing contents can be changed. In addition, the image display device according to the eighth embodiment can display a large proportion of data equivalent to the state without external light even under the influence of external light, and can provide a viewer with a large contrast and good visibility. . Also, in the eighth embodiment, the black approximation data is set by applying the idea of the second embodiment, except for the light effect, because of the characteristics of the image display device-(Please read the precautions on the back before filling this page) Order · -line-Applicable paper size for printing printed clothes of employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs _ National Standard (CNS) A4 (210 X 297 mm) 52 312179 499814 Α7 ---- B7 V. Description of the invention ( 53) When the tristimulus value during display becomes larger, the same display can be performed as when the tristimulus value during black display is 0. Embodiment 9 Fig. 25 is a block diagram showing a configuration example of an image display device according to Embodiment 9 of the present invention. As shown in the figure, the input image processing device 1, the black correction device 2A, and the black approximation data generation device 4 'are the same as those in the first embodiment shown in FIG. 1, and the image display device 3 is replaced with a day image display device 3B and The gray scale conversion device 7 is different from the first embodiment. Therefore, the black correction device 2A, the black approximation data generating device 4 and the gray scale conversion device 7 constitute a black correction unit 115. In the first to seventh embodiments, the image display device is assumed to have a relationship between the size of the inputted external light correction data R2, G2, and B2 and the three stimulus values XI, Y1, and Z1 of the displayed color (light). It is the image display device 3 represented by the following formula (32). That is, the three stimulus values XI, γ, and zi are linear changes (with linear gray scale characteristics) relative to the inputted external light correction data R2, G2, and B2. Display device. ---- Installation ---- (Please read the precautions on the back before filling this page) Order-. LINE-, printed by F Yuehui Property Bureau Employee Consumer Cooperative, 1 111, κχ χZ, ax xg) / \ R2 f \ Xbkl \ G2 + Ybkl > / B2 Zbkl \ / • (32) However, the gray scale characteristics of the existing image display device are non-linear, and the three stimulus values XI, Υ1, ZZ1 of the input data Most are non-linear. The image display device 3B in Embodiment 9 has a non-linear gray scale characteristic. The input gray scale is transformed and displayed as the three stimulus values XI, Yl, and Z1 of the image data R8, G8, and B8. The relationship is as follows (33): Paper size applies to China National Standard (CNS) A4 (210 X 297 public love) 53 312179… (33) V. Description of the invention ()

axr axg axb ayt ayg ayb azr azg azb 'J f (R8) f X Xbkl f (R8) + Ybkl f (R8) L J Zbkl v J

/ \ XI Y1 «Z1 X / In equation (3 3), £ (is a function of x, and represents the grayscale characteristics of the day image display device 3B. In the day image display device 3b of this embodiment, f ( x) is a non-linear function. The operation of the image display device according to the ninth embodiment will be described below with reference to FIGS. 2 to 5. The image data Ri,

Gi and Bi are input to the image processing device 1. The input image display device 1 applies input image processing to the input image data Ri, Gi, and Bi, and outputs the input processed image data R1, Gi, and bi made of the three color data. On the other hand, the black approximation data generating device 4 holds the black approximation data r3, G3, and B3, and generates the black approximation data 2A. The black correction device 2A is based on the input image data R1, G1, B1 and black approximate data r3, G3, and B3 as inputs to calculate the black corrected data r2, M, and B2 and output them. The above processing is the same as that in the first embodiment. The processing of calculating the black-corrected data R2, G2, and B2 in the black-correction device 2A is the same as in the first embodiment described above and will not be repeated. The black correction device 2A can also be realized by the configurations shown in the second to sixth embodiments. The black-corrected data R2, G2, and B2 output by the black-correction device 2A are sent to the gray-scale conversion device 7. In the grayscale transforming device 7, the grayscale transform shown in the following formula (34) is applied to output the image data R8, G8, and B8 after the grayscale transform. The gray-scale conversion device 7 may be configured by hardware or software. This paper size applies to China National Standard (CNS) A4 (210 X 297 public love) 54 312179 499814 55 5. Description of the invention (R8 = g (R2) = f-1 (R2) 〇8 = g (G2) = £ ^ 1 (G2) --- (34) B8 = g (B2) = f (B2) In equation (34) 'g (x) is the inverse function of the grayscale characteristic f (x) of the image display device 3b, which is g (f (x)) = f (g (x)) = 1. The gray-scale transformed data R8, G8, and B8 output by the gray-scale transformation device 7 are rounded to the day image display device 3B. Here, In the image display device 3B, the relationship between the rotated gray image correction image data R8, G8, and B8 and the displayed three stimulus values χι, γι, and Z1 is shown in equation (33). On the other hand, the black correction The post-data, G2, b2, and grayscale corrected day-to-day image data R8, G8, and B8 are shown in equation (34). Therefore, the black-corrected data R2, G2, B2, and the tristimulus value displayed by the day-image display device 3B are shown. The relationship between XI, Y1, and Z1 is shown in the following formula (35): XI Y1 Z1 axr axg axb ayr ayg ayb azrazga zb R2 G2 B2 ^ S Xbkl Ybkl Zbkl • (35) Printed by the Ministry of Economic Affairs and the Intellectual Property Bureau Staff Consumer Cooperative According to formula (35), the image displayed by the image display device 3B is The three stimulus values xi, Yl, and Z1 are linear to the black-corrected data R2, G2, and B2. If so, the processing corresponding to the black-correction device 2 A can be performed in the same manner as in the first to seventh embodiments. The image display device of the form 9 performs a grayscale transformation represented by the inverse function of the grayscale characteristics of the image display device with respect to the data after black correction. Therefore, even if affected by external light, a large proportion of data can be compared with The state of the effect of external light has the same display, and can provide viewers with high-contrast, good-looking portraits. This paper size applies the Chinese National Standard (CNS) A4 specification (21 × x 297 mm 55 312179 499814 Ministry of Economic Affairs intellectual property) Bureau ’s consumer cooperative prints clothes A7 B7 V. Description of the invention (56) In the ninth embodiment, the black approximation data can be set by applying the idea of the second embodiment. Therefore, in addition to being affected by external light, the image display device When the characteristic is such that the tristimulus value during the black display becomes large, the same display as when the tristimulus value during the black display is 0 can be achieved. Embodiment 10 FIG. 26 is a diagram illustrating an embodiment of the present invention. A block diagram of a configuration example of a black correction device in the image display device of the state 10. As shown in the figure, the black correction device 2E is composed of a subtraction data calculation device 10D (adjustment data calculation device 23, subtraction device 26), and a subtraction device 11. In this figure, the subtraction means η is the same as that in the fourth embodiment shown in Fig. 15 except that the black correction device 2A is replaced with the black correction device 2E, and the overall configuration is the same as that in the first embodiment. It should be noted that the black correction device 2E may be realized with the configurations shown in the second to sixth embodiments. As in the case of the fourth embodiment, the approximate data R3, G3, and B3 input to the black correction device 2E are input to the subtraction data calculation device iqd, and the subtraction data calculation device 10D calculates subtraction data R4, G4, and B4. The subtraction data calculation device 10D is composed of an adjustment data calculation device 23 and a subtraction device 26. The adjustment data calculation device 23 inputs the input processed image data R1, G1, and B1, and calculates adjustment data from the image data R1, G1, and B1. The subtraction means 26 inputs the adjustment data su and the black approximation data R3, G3, and B3 output from the adjustment data calculation means 23, and calculates the data R4, 04, and B4 for reduction through the subtraction processing shown in the following formula (36). (Please read the notes on the back before filling this page)

This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 56 312179 499814 A7

III equipment tr i I i III 1 k 499814 A7 V. Description of the Invention (58) B3 is the data related to the brightness, chroma or tristimulus value of the image display device 3 in black display, and it is not due to the input of processed image data R1 , G1, and B1 values. Therefore, when the subtraction data R4, G4, and B4 are equal to the black approximation data R3, G3, and B3, for example, if the input processed image data ri, gi, and B1 are smaller than the black approximation data R3, G3, and B3, after the black correction, The data will occur as negative values. In the reference tables 19d to 19f, after the input processing image data R1, Gl, B1 is small, adjustment data sur, sug, sub with positive values occur, and the subtraction data calculation device ι0 approximates the black data. R3, g3, and B3 are calculated by subtracting the adjustment data 811 from the adjustment data to calculate the reduction data r4, G4, and B4, which can prevent the negatively corrected data R2, 02, and 62 from occurring. Fig. 28 is a graph showing an example of the relationship between the day image data after input processing and the data after black correction. It is assumed that the image data ri after input processing and the data R2 after black correction have the adjustment data sur in a relationship as shown in FIG. 28 and are stored in the lookup table 19d. At this time, the image data after black correction is shown in the following formula (38). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

Rl g 2 · R3 R1 < 2 · R3 R2 R2

Rl ~ R3 R1 ~ • (38> The subtraction data R4 is the difference between the black corrected data ^ and the portrait data R1 after rounding, which can be expressed by the following formula (39). The paper size is applicable to the national standard (CNS) A4_i. X 297 mm > 58 312179 (Please read the notes on the back before filling this page)

499814 A7 B7 V. Description of the invention (59) R1 g 2 · 13 at R1 < 2 · 13 at R4 R4 R3 R1 • (39) Furthermore, the adjustment data sur is the difference between the black approximation data R3 and the subtraction data R4, It can be calculated from the following formula (40). The black approximate data R3 value 'of the formula (40) may be written into the lookup table 19d in advance, such as a table data writing device (not shown). Although the above is the description of sur ', the same applies to sug and sub. R1 2 2 · I13 hours Rl < 2-R3 hours sur sur 〇 R3 R1 (40) The consumer data of the Intellectual Property Bureau of the Ministry of Economy is printed on the adjustment data calculation device 23 of the tenth embodiment, and the adjustment data sur, sug, The maximum value in sub is output as the adjustment data su. Therefore, negative values can be prevented from occurring in the data R2, G2, and B2 after the black correction. If so, according to the portrait display device of Embodiment 10 of the present invention, even under the influence of external light, 'a larger proportion of data can be equivalent to the state without external light influence, which can provide a viewer with a large contrast and good visibility. Day image. Furthermore, in the portrait display device according to the first embodiment, the processed image data R1, Gl, and B1 will have a "black burst" phenomenon in which the brightness becomes fixed in the areas of the black approximation data R3, () 3, or less. However, in the image display device of this embodiment, the lookup table stores appropriate adjustments and data, thereby suppressing the "blackout" phenomenon. The detailed description of the present invention is as described above, but the above description belongs to all State of the invention, the invention is not limited to this. Countless examples of double-form, can be understood not to depart from the scope of the invention. This paper size applies the National Standard A (CNS) A4 specification (210 X 297 mm) 312179 «--- ^ --------------- 1 (Please read the notes on the back before filling this page)

Claims (1)

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 499814 A8 C8 One by one ......... _ " ni D8 VI. Patent Application Scope 1. A portrait display device Its characteristics are provided with: a correction unit that applies black correction processing to correct black reproducibility for image data containing color data and outputs black corrected image data; and the image display device according to the aforementioned black correction The post-image data displays an image on a predetermined screen, and the black correction section just described implements the black correction processing according to the characteristics of the image display device in black display. 2. The portrait display device according to item 1 of the scope of patent application, wherein the color data includes a predetermined number of color data, and the black correction unit includes: a black approximation data generating device that generates a black display according to the day image display device Black approximation data of at least one of luminance, chroma, and tristimulus values involved in the black display; and a black correction device that implements the aforementioned black approximation on the aforementioned image data in a predetermined number of color data units Data reduction processing, and output the aforementioned black corrected image data. 3. The portrait display device according to item 2 of the scope of patent application, wherein the black correction device includes: a subtraction device that subtracts the black approximate data from the portrait data by using the predetermined number of color data units to obtain a difference. Obtain the subtraction data; and a limiter, in the aforementioned predetermined number of color data of the subtraction data, set the undercolor, 0, and color data to 0 to obtain the aforementioned black corrected image data. I !! # .— (Please read the notes on the back before filling out this page)-Line. · #. This paper size applies to Chinese national standards (CN ^ A4 size GW X 297 public love) 60 312179 t, patent application scope 4. The portrait display device according to item 2 of the scope of patent application, wherein the aforementioned black correction device includes: a subtraction device 'from the aforementioned portrait data, the aforementioned black approximate data is specified by a predetermined color data unit for subtraction processing to obtain subtraction data; The addition data generating device 'generates data based on the above-mentioned subtracted data, and the above-mentioned addition data; and the device, based on the aforementioned reduced data, performs the addition processing on the aforementioned add-on data: = fixed number of color data units to obtain the aforementioned black The corrected portrait data. 5. The portrait display device according to item 2 of the patent application range, wherein the black correction device includes: a subtraction data calculation device that performs multiplication based on a multiplier of "1" or less of the aforementioned portrait data. The aforementioned black reduction data is used to reduce the data; and the difference reducing device subtracts the aforementioned reduction data from the aforementioned image data to the color unit of the former fan number. Obtain the reduced data carefully, and output it as the image data after the black correction. 6. If the image display device of the scope of patent application No. 5 is, the data calculation device for the reduction includes the calculation of the multiplication coefficient. The device calculates the multiplication coefficient based on the day image data, and the following multiplication coefficients; and the multiplication device 'multiplies the black approximation data by the multiplication coefficients to obtain subtraction data, and the multiplication coefficient calculation device includes: : The multiplication coefficient candidate output unit outputs the multiplication coefficient candidates for the specified number of color data in the range of 499814 A8 B8 C8 D8 according to the aforementioned portrait data; and the minimum value selection device, since Among the predetermined number of multiplication coefficient candidates, 'select the smallest multiplication coefficient candidate to output the aforementioned multiplication coefficient. 7. The portrait display device according to item 2 of the patent application range, wherein the black correction device includes: calculation of subtraction data The device will calculate the subtraction from the black approximation data based on the adjustment data above "Q" of the aforementioned image data. And a reduction device, which subtracts the aforementioned reduction data from the aforementioned portrait data by using the aforementioned predetermined number of color data units to obtain the reduced data as the aforementioned black corrected portrait data and outputs it. An image display device, wherein the color data includes a predetermined number of color data, and the black correction unit includes: a black approximation data generating device, wherein the image display device is based on the characteristics of the black display when the brightness and color are displayed in black. Black approximation data of at least one participating data among the degree and tristimulus value; a look-up table to store the table data; and a table data writing device, which can derive a black correction from the black approximation data and the aforementioned portrait data The table data of the image data is written into the lookup table, and the lookup table refers to the table data and obtains the black corrected image data based on the image data. 9 · If the portrait display device of the scope of patent application is No. 1, among them, (Please read the precautions on the back before filling this page)-#-线 · Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs This paper is applicable to China Standard (CNS) A4 size (210 X 297 mm) 62 312179 499814 Printed by A8, B8, C8, D8, Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 6. The scope of the patent application. The aforementioned color data contains a predetermined number of color data. The aforementioned black correction unit includes: a black approximation data generating device. Characteristics at the time of black display: Black approximation data of at least one participating data among brightness, chroma, and tristimulus values during black display; a black correction device that uses the aforementioned black approximation data as the aforementioned predetermined number of color data units from the aforementioned image data Subtraction processing and outputting the aforementioned black corrected day image data; and a gray scale conversion device that converts the black corrected image data to output gray scale corrected image data, and the foregoing image display device includes a portrait display device and is based on The gray scale corrected image data is displayed as a portrait on the predetermined screen, and the gray scale conversion device displays at least one of exemption, chromaticity, and tristimulus value displayed by the image display device, so that the black corrected data becomes The above-mentioned grayscale corrected data is obtained in a linear manner. 10. The portrait display device according to item 1 of the patent application scope, wherein the color data includes a predetermined number of color data, and the black correction unit includes: an external light detection device for detecting the predetermined day of the image display device. And output at least one of brightness, chromaticity, and tristimulus value of the external light irradiated on the surface of the surface, and output external light detection data; and a black approximation data calculation and generation device, which is generated based on the external light detection data and calculated based on the aforementioned image Black approximation data of the characteristics of the display device during the aforementioned black display. _National Fresh (CNS) A4 Specification ⑽ X 297 Public Love)-«-^ — I— I ^ * ----- 11 ^ ----- Ιί-Ί (Please read the note on the back? Matters before (Fill in this page) 499814 A8 B8 C8 6. Scope of patent application η · If the portrait display device of any of the items 1 to 10 of the scope of patent application, wherein the characteristics of the aforementioned day image display device in black display include the aforementioned day image display device in the aforementioned provisions Reflected light characteristics of light outside the screen surface. 12. The portrait display device according to item 11 of the scope of patent application, wherein the characteristic of the external light reflected light 'includes at least one of brightness, chromaticity, and tristimulus value of the color of the external light reflected light. 13. The portrait display device according to item 12 of the patent application range, wherein the black approximation data is in a state not affected by external light, and the brightness and chromaticity of the color displayed when the black approximation data is input to the portrait display device Among the three stimulus values, the difference between the image index value of at least one type of data and the aforementioned day image index value during the black display of the image display device includes the black whose value is set to the aforementioned image index value of the reflected light of the external light Approximate data. 14. The portrait display device according to item 12 of the patent application range, wherein the characteristics of the foregoing image display device when displayed in black further include at least one of the brightness, chromaticity, and tristimulus value of the color of the foregoing image display device when displayed in black. One. 15. The portrait display device according to item 14 of the patent application range, wherein the aforementioned black approximate data is in a state without the influence of external light, and the brightness and chromaticity of the color displayed when the aforementioned black approximate data is input to the aforementioned portrait display device The difference between the image index value of at least one of the three stimulus values and the image index value of the foregoing image display device when the image display device is displayed in black, set the value so that please read the precautions on the back before filling in this page). Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 64 312179 499814 A8 B8 C8 D8. The color of the device during black display becomes the black approximate data of the aforementioned image index value. . Intellectual Property of the Ministry of Economic Affairs_Printed by the Bureau ’s Consumer Cooperatives. The paper size applies to the Chinese National Standard (CNS) A4 (210 X 297 mm) 65 312179 -------------- Agriculture- ------ Order! (Please read the notes on the back before filling this page) • Line ·