TW498301B - Liquid crystal display device - Google Patents

Abstract

This invention relates to an RGBW-typed LCD wherein a proper luminous image can be displayed according to a predetermined calculation with a decoder where some predetermined calculation formulas are embedded. Further, not only RGBW image display but also RGW image display can be used by a predetermined controlling signal.

Description

498301 Amendment No. 90111629 V. Description of the Invention (1) The present invention relates to a liquid crystal display device capable of displaying color images. In recent years, liquid crystal display devices capable of displaying color images have been widely used in, for example, personal computers, video cameras, and car navigation systems. A transparent color filter device (W) is an RGBW type liquid crystal display device (hereinafter referred to as an RGBW type liquid crystal display device) configured in addition to a conventional RGB type RGB color filter device. The method proposed in 0 9 98/1 9 9 8 relates to a method for improving pixels and brightness of a liquid crystal panel of the liquid crystal display device. However, even if you try to improve the brightness of the LCD panel by only adding a transparent color device, if a part of the pixel brightness of the transparent color filter device cannot be properly controlled in an independent manner, a white color will be mixed in all display colors, so the color purity (Saturation) is reduced, and the image will have an unwanted display color that is different from an original image display. Therefore, a first object of the present invention is to provide an RGBW type liquid crystal display device, which can establish the brightness of a liquid crystal panel under a predetermined calculation by appropriately controlling the pixel brightness of the transparent color filter device in an independent manner. Improve the brightness of the image output from the LCD panel. According to the liquid crystal display device described in item 1 of the scope of the patent application, the predetermined calculation process of the data calculation device may be used when the digital value of the brightness-enhancing pixel is defined as W, and by transmitting a W = f (Ymin, Ymax ) Function to obtain the digital values used to drive the brightness enhancement subpixel, and the digital values Ymin and Ymax of each of the red input subpixel, the green input subpixel, and the blue input subpixel. Are defined as a minimum value and a maximum value respectively, thereby achieving the first purpose. According to the liquid crystal display device described in item 2 of the scope of patent application, when the

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When the Ymin value or the Ymax value becomes larger, the function w = f (Ymin, Ymax) is a monotonically increasing function of 〆, thereby achieving the first purpose. According to the liquid crystal display device described in the third item of the patent application scope, the W = f (Ymin, Ymax) is a function, wherein the Ymin is a variable value, and the Ymax is a constant value, and when the Ymin value becomes larger The function increases monotonically to achieve the first purpose. According to the liquid crystal display device described in item 4 of the scope of patent application, in a case where Jiang, / 3, and η are predetermined real numbers and a maximum value can be adopted as the red input sub-pixel, the green input sub-pixel and the blue The input sub-pixel is defined as MAX. The function w = f (Ymin, Ymax) can be used through the function W = Max * {(Ymin + 〇:) + (MAX + 0)} n, which is used to drive the brightness-enhancing sub-pixel. A digital value is available to achieve this first purpose. According to the liquid crystal display device according to any one of claims 1 to 4, the digital value of any one of the red input sub-pixel, the green input sub-pixel, and the input sub-pixel is zero. The case value is at a value of zero, thereby achieving the first purpose. The liquid crystal display device described in item 6 of the scope of the patent application includes: a storage device for storing a complex function type passing the function w = f (Ymin, γ); and a table selection device for selecting the storage device One of the complex function types represented by the Wf (Ymin, Ymax) stored in the device, thereby achieving the first purpose. T Any liquid crystal display with a red output sub-pixel as described in item 7 of the scope of the patent application , The green turns out sub-pixels, and the blue turns out neutrons and the image

O: \ 71 \ 71109-910523. Page 5 498301 Amendment No. 90111629 V. Description of the invention (3) The element constitutes a main pixel unit without using the luminous sub-pixel, which is regarded as one of the liquid crystals capable of displaying colors The display device is used to achieve the second object. The liquid crystal display device described in item 8 of the scope of the patent application, wherein it can perform an image display, wherein the red output sub-pixel, the green output sub-pixel, and the blue output sub-pixel constitute a main pixel unit, and There is no need to use the luminescent sub-pixel; and an image display, in which the red output sub-pixel, the green output sub-pixel, and the blue output sub-pixel constitute a main pixel unit using one of the luminescent sub-pixels at the same time, thereby achieving Second purpose. These and other aspects of the invention will be better understood from the description of the following specific embodiments. In the drawings: FIG. 1 is a block diagram showing the structure of a liquid crystal display device 100 according to a preferred embodiment of the present invention; FIG. 2 is a sub-pixel, a Plane top view of the gate bus and a source bus; FIG. 3 is a circuit block diagram of a source driver 3 and a decoder 6 shown in FIG. 1; FIG. 4 is a color using a mathematical formula 2 Fig. 5 is a diagram of a calculation result obtained by using a mathematical formula 3; Fig. 6 shows a modified top view of a specific embodiment shown in Fig. 2; Fig. 7 shows a specific embodiment shown in Fig. 2 A modified top view; and FIG. 8 is a block diagram showing a modification of the specific embodiment shown in FIG. 3. FIG. 9 shows a modified diagram of FIG. 3.

O: \ 71 \ 71109-910523.ptc Page 6 498301 Symbols of graphic elements 1 LCD panel 2 Gate driver 3 Source driver 4 Signal control unit 5 Image data holding unit 6 Decoder 7 Comparator 8 Look up table 10 0 Liquid crystal display device

FIG. 1 is a block diagram showing the structure of a liquid crystal display device 100 according to a specific embodiment of the present invention. The liquid crystal display device i 00 provides a liquid crystal panel 1. FIG. 2 is a top view of a horizontal portion of the liquid crystal panel 1. The liquid crystal panel 1 provides gate bus bars G 丨 to Gm (m: a natural number) and similar columns of source bus bars S1 to Sn (η: —natural number) as shown in FIG. 2. Moreover, the gate buses G1 to Gm are connected to the gate driver 2, and the source buses S1 to Sm are connected to the source driver 3. Moreover, the sub-pixels R (red), G (green), B (blue), or W (white (for enhanced brightness)) are arranged on the gate buses G i and G 1 + 1 ( i = 1 to m) and source junctions S j and S j + 1 (j = 1 to 111)

结构。 Structure. Further, TFTs (thin film transistors) Qi j are arranged near the intersection of the gate bus bar Gi and the source bus bar S j. In addition, the gate bus G 1 is connected to the gate of the TFTQ i] •, and the source bus S is connected to the source of the TFT. Q 1], and the display electrode of each 孑 pixel Lij and ^^ Ding / and extremely connected

O: \ 71 \ 71109-910523.ptc Page 7 498301 Case No. 90111629 _ Case No. 90111629% Year 25th Amendment _ V. Description of Invention (5) Continue. Moreover, the electrode opposite to the display electrode of each sub-pixel Lij is a common electrode 12, and this common electrode 12 is connected to a voltage supply circuit (not shown in the figure). Further, the RGBW color transition device is arranged for each sub-pixel L i j as follows. When the sub-pixels are arranged in a vertical line as shown in FIG. 2, and one pixel is composed of four RGBW sub-pixels. R: Lij (i = l, 2, 3, ···, m-1, j = l, 5, 9, ···, n-3) G: Lij (i = l, 2, 3, ... ., m, j = 2, 6, 10, ..., n-2) B: Lij (i = 1, 2, 3, ···, m, j = 3, 7, 11, ···, n -1) W: Lij (I = l, 2, 3, ..., m ~ l, j = 4, 8, 12, ..., n) _ In this LCD panel 1, these sub-pixels are formed A longitudinal configuration. Further, a TFT substrate formed of a sub-pixel electrode, a color filter device substrate formed of a common electrode, and a glass substrate, which are not shown in the figure, are arranged perpendicular to a panel surface direction of the liquid crystal panel 1 And, a liquid crystal is filled in this way, and inserted between these substrates. In the color filter device base material, although the red, green, blue, and blue translucent color filter devices are respectively arranged on a part corresponding to the sub-pixel RGB, the color filter device is not on a part corresponding to the sub-pixel W. Configuration, or transparent filter device configuration. Please refer to FIG. 1. The liquid crystal display device 100 will be described continuously. The gate driver 2 and the eight source drivers 3 are arranged around the liquid crystal panel 1. An amplifier, a digital-to-analog converter (DAC), and a latching circuit, not shown in the figure, are configured at each source driver3. Moreover, the liquid crystal display device 100 has a signal control unit 4. The signal control unit 4 can supply a power supply voltage, and provide a control signal to the gate driver 2, the source driver 3, and a shadow.

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V. Description of the invention (6) The lean material holding unit 5 and a decoder 6. The source drive 3 is connected. Furthermore, the digital form 5 has a benefit, each of which is input to each of the eight sub-pixels of blue to obtain data, such as red and green. The image lean material holding unit 5 is connected to this decoder 6. 1 is maintained. Moreover, the liquid crystal display device 100 includes a reference potential, and provides a reference potential recognition circuit based on a predetermined clock frequency of 5 to drive 3 (not shown in the figure). The mother and source sources The operation of the liquid crystal display device shown in FIG. 1 will be described below. The control signal is provided from the signal control unit 4 to the gate driver. Source drive 3. The gate driver 2 can transmit a signal to each gate bus according to the control signal and each of them becomes conductive, and when the control signal is provided to each source driver 3, the brightness data is output. Ro, Go, Bo * w〇 can be based on the control Greek 3 binary in the latching part of the parent source driver 3 (not shown in the figure). Moreover, the 8-bit sub-pixels output brightness data And Wo can be obtained, and as a result, the decoder 6 can perform a predetermined calculation of input data Ri, Gi, and Bi (to be described later), and the pixel-bit image is held in the image data holding unit 5. Eight f children The sub-pixels under the flash control in the above flash control section output brightness data r0,

Go, Bo, and Wo are sequential output and input DAC sections (not shown in the figure), and the control power supply 4 can rotate the polarity control signal to determine whether the positive reference potential generated from the reference potential generation circuit = potential, or Select the potential from the negative polarity reference potential, and this polarity control ^ is the input DAC part. The DAC part is based on the input polarity control signal and the 498301 case number 90111629 f / year, month and day. V. Description of the invention (7) Subpixel output brightness Data Ro, Go, Bo, and Wo reference potential generation circuit generated potential, and select the corresponding to these W sub-pixel output brightness data R 0, Go, Bo and Wo potential. When the potential is selected through the DAC part, the DAC part can A selected potential voltage is appropriately divided into several steps through a resistor divider, so that a desired gradient can be obtained. The voltage division is to amplify the current through an amplifier and transfer it to the source and pole bus bars S1 to Sn (refer to FIG. 2). ) Corresponds to one of them. When a signal sent to one of the gate buses G 1 to G m is turned on through transmission, the signal transmitted to the source bus is transmitted. The potential signal can be transmitted to each sub-pixel electrode through this method. According to this operation, the potential corresponding to the luminance data output by the sub-pixel can be added to each sub-pixel electrode. Therefore, a voltage can be provided to the one inserted between the sub-pixel electrodes. The liquid crystal layer is driven by the potential of each sub-pixel electrode, so the task π: 疋 s should be added to the liquid crystal panel and displayed on the LCD panel. ~ Image can be added by adding color about the above decoder 6 The calculation process is better and will be further described with reference to Figure 3. The decoder 6 can be obtained from the video / image, and the embodiment will get 8 bits of red, green and blue in each rotation. The unit 5 obtains W0 and outputs it to the source driver. The following processing is required. To obtain the W sub-pixels G i and B i, as shown in FIG. 3, the digital data R i, Subpixel output brightness data R0, Go, 1, G1, and 61. Do not lose. On the other hand, the brightness data Wo decoder 6 provides a comparator 7 and a lookup table 8. The input subpixel digital data R i # Comparison of G, G i and B i Comparator 7 may then

498301 Amendment No. 90111629 V. Description of the invention (8) Convert this value to the size of the brightness data to select these Ri, a minimum value Ym in 〇 可 d # Then, look up the table 8 can convert the Ymin value, so you can choose and change It is converted into w sub-pixels' for outputting brightness data ¥ 0 through this comparator 7. The W sub-pixel conversion for outputting the luminance data Wo of the above Ymin value can be easily implemented by using PR0M. 1) A: 璺 'J & Guan T ~ Huanhua Formula 1 calculation result is slightly As will be described later, the change from 0 to 25 5 Ymin helmet 佶 拎 拎 广 — — 昤 Control left ^ v · / 1111 change of a female value (gradient case in step 2 5 6) 疋 is stored in a single address. In addition, if a circuit configuration is only for this purpose, the signals and the like from controlling the early 4 to the decoder 6 or the like are not necessary. However, the subpixel data Ri, Gi and. In the future, since the comparator and the look-up table 耠 + 工 工 广 喜 仏 山 一 '6 input ^ Han output W sub-pixel output brightness slope Wn, the number ^ time = one delay will occur, so long time again Betty Wo's. At this time, the RGB sub-pixels turn out the brightness data R0 and G0, and the output of the brightness data w 0 with the w-subpixel will be delayed. The output of T ^ W〇 is synchronized in the decoder 6 as described above. The decoder 6 can determine the redundant sub-pixel output from the input of the sub-pixel data Ri, Gi, and Bi from the first input. In addition, the above mathematical formula 1 Will be described. The mathematical formula i is given by 、 村. Wo = f (Ymin, Ymax) is a _selection function. When w is used for brightness data, and a minimum value is Ymin, a red input pixel, a green input pixel, And — = the relatively identical digit value Ymax of each of the large input pixels. Extinction Monotonically increases a function when the Ymin value or the Ymax value becomes large. The function shown in Mathematical Formula 1 is used. For example, it is a function like

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Wo = (Ymax * Ymin) / MAX2. Here, MAX is the maximum value used for the values of the input luminance data Ri, Gi · and B i. In addition, Wo = MAX * {(MI NRGB + α) / (MAX + θ)} n (hereinafter this mathematical formula is referred to as a mathematical formula 2) is another preferred example of mathematical formula 1. This mathematical formula 2 will be described in detail below. This mathematical formula 2 is a function. Among them, a minimum value of the input luminance data of the RGB subpixels input at the decoder 6 is defined as a variable, thereby determining the output luminance data of the W subpixels. Wo 0 In this mathematical formula 2 Among them, Wo is the output luminance data of the W sub-pixels, MAX is the maximum value of the input luminance data Ri, Gi, and Bi that can be used as described above, and MINRGB is the minimum value of the input luminance data Ri, Gi, and Bi that can be used. ^ Also, α, shi, and η are selective real numbers. The values of α, / 3, and η can be determined by the optical characteristics of the brightness that is set as the target of the liquid crystal display device 100. For example, the situation obtained at cold =: 0 can be quoted from the situation where Wo reaches MAX, that is, when the brightness data is entered-

When the minimum value MINRGB (Ymin) of Ri, Gi, and Bi is MAX, it can provide the maximum brightness of the liquid crystal panel 1 of the liquid crystal display 100. Also, since when the minimum value MINRGB (Ymin) of the input luminance data Ri, Gi and Bi is zero, Wo will be zero, and in this case, when the minimum input luminance data Ri, Gi, and Bi are minimum, The value MINRGB (Ymin) is MAX, and W 〇 = MAX is obtained, so in the case of obtaining α = 〇 and 10,000 = 〇, it will decrease from the contrast, and its essence will follow the LCD display. Alternatively, when the display color of the liquid crystal display device 100 is a 256-step gradient, the MAX value is ΜAX = 25 5.

O: \ 71 \ 71109-910523.ptc Page 12 498301 __ Case No. 90111629 7 / year factory month zj day amended 5. Description of the invention (10) Calculation by mathematical formula 2 can also be performed by using a look-up table (LUT) Implemented, and the decoder 6 is included as described above. This look-up table can be easily built into the ASIC of the decoder 6, and when each input and brightness data of RGB W are eight bits of this look-up table, a PROM with a storage capacity of 256 bytes can be easily used And EEPR0M implementation. The above-mentioned α and cold values can be set in a look-up table in advance according to the desired optical characteristics (brightness) of the liquid crystal display device. Here, the theory determined in Mathematical Formula 2 will be explained below with respect to the chromatic aperture of FIG. 4. At present, when Ri, Gi, and Bi on the chromatic aperture of FIG. 4 and each point at R, G, B, and W are in the following relationship, that is, when Ri = MAX and G = B = 0, it is Corresponding to the relationship of point R, point G is when G = MAX and R = B = 0, point B is when B = MAX · and R = G = 0, and point W is when R i = MAX and R = G = When B is satisfied, the following conclusions can be obtained. π When any one of the values R, G, and B is greater than zero, the chromaticity is within π ° π in the triangle RGB of FIG. 4, that is, the color provides a white (gray) element, and is close to the point W ". The following conclusions are obtained about w from the above conclusions. (1) π In the case of R = G = B, only the brightness will increase, and not even increase W to change the chromaticity π. Θ (2) π The triangle RGW represents the range of colors that can be represented by a liquid crystal display device. Therefore, when at least any one of R, G, and B is zero, W = 0 can be set to prevent this range from being narrow. " (3) π When the chromaticities of larger R, G, and B are close to the point w, which is the minimum value, the values R, G, and B become larger. π means that the minimum value of R, G, and B indicates how the color will be white. "π Therefore, if W has the minimum function of R, G, and B, the brightness will increase without excessively changing the chromaticity. One pixel is transparent

O: \ 71 \ 71109-910523.ptc Page 13 498301 Amendment No. 90111629 V. Description of the invention (11) Three sub-pixels R, G and B constitute π. Therefore, a mathematical formula 2 that can provide functions such as R, G, and B minimum (MINRGB) functions W can be obtained from the conclusions of the above items (1), (2), and (3). Then, the decoder 6 uses this mathematical formula 2 to determine some specific embodiments (examples 1 to 3) of w 0 which will be described below with reference to the mathematical formula 2 of FIG. 5. FIG. 5 is a diagram of Mathematical Formula 2. When the maximum-large gradient number of each pixel of the display image is 2 56 steps, the above-mentioned MINRGB value determined by the decoder 6 is regarded as a variable of the X axis. It is adopted, and the value Wo determined by replacing MINRGB with mathematical formula 2 is adopted as a variable of the Y axis. As shown in Example 1, it describes the case where any one of the values of the brightness data Ri, Gi, and Bi is zero. In this case, since MINRGB = 0, Wo = 0 is obtained from the calculation of Mathematical Formula 2 (the X-axis of the plot in FIG. 5). That is, w0 = 0 can be designed and implemented so that the color purity (saturation) does not decrease in this case. As shown in Example 2, the description = 0 and n = 1 are set in the mathematical formula 2. In this case, since Mathematical Formula 2 is converted into W 0 = W I N R G B, the result represented by the straight line in FIG. 5 (Example 2) can be obtained. Therefore, the original image gamma (r) characteristics before the input of the image data holding section 5 can be maintained in this case. Moreover, the structure of the added circuit is simple 'and the size of the structure of the circuit needs to be small. As described in Example 3, the value of "n" is set to a value larger than the numerical value "Γ" of mathematical formula 2. In this example 3, n = 2 and = 0 are set. ΜΑχ = 255. From this setting, the mathematical formula 2 uses Wo = 2 5 5 * (MINRGB / 25 5 > (Hereinafter, this mathematical formula is regarded as "mathematical formula"

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L) It shows that this mathematical formula 3 is a line drawing diagram using FIG. 5 (Example 3). It does not have a value of 0 (a missing range change \ 3). You can understand that when the MINRGB value is large, but the iM INEGB value is close to the J product:? : 5③: The calculation of the formula \: / also, 7 you * When taking a large number of steps, the shell of the W sub-pixel suddenly becomes high, and the household weight is displayed in white with about loo%. Tong can be implemented in a flashing manner. As a result, the bright sea I ^ ΐ * flower can be implemented only through a cathode ray tube (CRT), and a brilliant display of a metal can be displayed.

Moreover, the understanding of this (example 3) drawing is noticeable. The drawing of w 〇 is worth noting. It is a curved shape protruding downward (monotonically increasing) in an intermediate value variable region adopted by the MIN RGB value. As a result, the brightness (w0) of the w sub-pixel can suppress half-toning such as M IN R G B-64 to 192, and the initial chromaticity (saturation) of the half-toning can be maintained in the display image. As described above, 'various images can be made possible by defining a constant of a mathematical formula 2 required to define according to the specific embodiments. Its design is selected so that an image desired by a user can be obtained from the outside by storing, for example, the functions of Examples 1 to 3 described above, and used to determine in advance the W in the plural items of the lookup table provided on the decoder 6. . As described above, according to this specific embodiment, the appropriate W sub-pixel output luminance data can be determined in response to the displayed shirt image by performing calculation processing by the decoder 6 according to Mathematical Formula 1. Moreover, the optical characteristics of various brightnesses desired in the liquid crystal display device 100 can be provided by setting various functions in a look-up table provided on the decoder 6 in advance. ° Secondly, as mentioned above, the LCD panel i 00 can also be used as a "㈣-type LCD display‘

O: \ 71 \ 71109-910523.ptc Page 15 498301 Case No. 90111629 Rev. cAj date _ V. Description of the invention (13) The structure used for the display and RGB type liquid crystal display will be described with reference to FIG. The structure of the block diagram is described as the main part of a specific embodiment. In addition to the input signals Ri, Gi and Bi, a control signal Ci, which is one of the further 1-bit functions of the switch control signal, can be added in order to achieve this further specific embodiment as shown in FIG. This C i signal is synchronized with the clock frequencies of the above-mentioned input signals R i, Gi and B i, and when this (: 丨 signal is at a high level, all the circuits in FIG. 6 are allowed to perform a function for displaying RGBW On the other hand, CMP7 and LUT6 can be skipped, Wo = 0 can be set, and when this C i signal is at a low level, the input signals R i, Gi and B i can be used as the output signals Ro, Go and Bo. Output. According to this operation, by changing the high and low levels of the Ci signal, either the RGB display or the RGBW display can be displayed. Moreover, when RGB display is required, it is designed so that Wo = 0 is set in LUT8. The change of the C i signal can be performed by software by a personal computer provided with a liquid crystal display device 100, or the change can be performed by pressing a shortcut key or the like on a keyboard of the personal computer. According to this operation, since the special It is not necessary to brighten a white color when preparing a text in an office, so it can be used as an RGB type liquid crystal display device. On the other hand, when designing a snow scene, a waxed car, and a cloud, Or for example an automatic When a white text on a slide projector becomes bright, it can be used as an RGBW type liquid crystal display device. One part can be displayed on the RGB W screen, and the other can be displayed on the RGB screen by using a window of a personal computer screen. In this case, it is structured such that a pixel according to the C i signal can pass through each pixel

O: \ 71 \ 71109-910523.ptc Page 16a Case No. 90111629 Description of the invention (14) --- Early, but according to the input signals Ri, Gi and B 丨, = Yes, the Ci signal can be at High Features are provided on the window screen II, and (^ signal can display the Rgbw_ on the ^ image of the Low window screen, such as 'according to this structure' through the root element to display the Rgb display 2 LCD display provided on the computer The device and the metallic surface of the vehicle of the public sales unit obtained a glorious fluorescent screen, vehicle display, window screen, and a vehicle outline or similar; two Z screens are displayed on the right half of the screen. When used on the RGBW screen · The document in the middle can be displayed on the left when the document can be faded by whitening and the other one is included. It is easy to read, and there is no need to make a white (brightness). In the liquid crystal display, when viewed from the Huan 2 screen, it is viewed at a distance compared with the RGB type liquid crystal display, and thus the RGBW type liquid crystal according to the present invention is white. The inspector can use the RGBW type liquid crystal display in a crowded display. Installation f = viewing from a distance For example, the white ^ f of an automatic reflection type slide projector and the viewer inevitably view the RGBW type LCD display or similar Japanese from a stepped wall surface or a distance of two or two. ^ ^ Shows a striking effect In addition, the invention described in the scope of each patent application does not have each of the specific embodiments described above, and various modifications are made. Ⅱ, +, A *, ι_ 1 KJ Tochigi is used below Within the scope described in the individual patent applications. 7 Γ Certain modifications will be described below. (1) Modification 1: Although in a preferred embodiment, the sub-pixels "are arranged in the vertical line as shown in Figure 2 Form arrangement, but it can be arranged in a form of mosaic shape as shown in Fig. 6. In this case, a work

O: \ 71 \ 71109-910523.ptc 498301 Case No. 90111629 f / year factory month Amendment V. Description of the invention (15) The other shapes are roughly square. (2) Modification 2: Although in the above modification 1, a mesh structure is formed through a source bus bar and a gate bus bar, and individual sub-pixels can be configured in a mesh structure one by one as shown in FIG. The pole bus can be wired through one section of every two steps of the sub-pixel, and the source bus can be wired in two sections between one sub-pixel step as shown in FIG. 7. According to this structure, the number of gate buses is the same as that of the previous RGB type, and a wiring characteristic of the TFT will maintain the same technology structure as before. Moreover, according to this structure, since the color of a sub-pixel connected to a segment of the source bus becomes a class, it becomes unnecessary to classify each column of source signals in the source driver 3. (3) Modification 3: Although in the above-mentioned preferred embodiment, the decoder 6 and the source driver 3 are formed as separate bodies as shown in FIG. 3, these can be transmitted through the An entry section configures the decoder and can be used as an integrated structure configuration of the decoder and the source driver. According to this structure, the number of luminance data of the W sub-pixels used for the data wiring amount corresponding to the printed circuit board can be avoided. As described above, according to the liquid crystal display device of the present invention, the brightness of an image displayed using a liquid crystal panel can be appropriately improved.

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Claims (1)

498301 Amendment No. 90111629 6. Scope of Patent Application 1. A liquid crystal display device with a liquid crystal panel capable of color display. In each main pixel unit, the liquid crystal panel has a red output sub-pixel, a green output sub-pixel, a The blue output sub-pixel and a brightness enhancement sub-pixel include the following features: A data computing device that can obtain a red input pixel, a green input pixel, and a blue input by using w from an input image, respectively. A pixel, which is obtained by implementing a predetermined calculation process to drive a luminance-enhanced sub-pixel, wherein the number of liquid crystal display devices can be used to drive the luminance-enhanced sub-pixel obtained by the data calculation device and the red , Green, and blue input subpixels to drive the brightness enhancement subpixel, the red output subpixel, the green output subpixel, and the blue output subpixel, which are characterized by: The predetermined calculation process of the computing device can be obtained by a W = f (Ymin, Ymax) function to drive the The digital value of the degree-enhanced sub-pixel, where the digital value of the brightness-enhanced pixel is defined as W, and the digital values of the red input sub-pixel, the green input sub-pixel, and the blue input sub-pixel are A minimum value and a maximum value are respectively defined as Ymin and Ymax. 2. As the liquid crystal display device of the second item of the patent application scope, when the Ymin value or the Ymax value becomes larger, the W = f (Ymin, The Ymax) function is a monotonically increasing function. 3. The liquid crystal display device of item 1 of the scope of patent application, which is characterized by: The W = f (Ymin, Ymax) function is a function, where the Ymin is a variable value, and The Ymax is a constant value, and when the Ymin value becomes larger, the Ymax O: \ 71 \ 71109-910523.ptc Page 20 498301 _Case No. 90111629_fVjT3 A3 Amendment _ 6. The scope of patent application can be monotonically increased. 4. The liquid crystal display device according to claim 1, 2, or 3, characterized in that when α, ω, and η are predetermined real numbers, and when the red input sub-pixel digit value, the green input sub-pixel, and One of the maximum values that can be used for the digital values of the blue input sub-pixel is defined as MAX. The tw = f (Y min, Ymax) function can pass a W = Max 氺 {(Ymiu + α) + (ΜΑχ + Cold)} η function, where a digital value of _ used to drive the brightness enhancement sub-pixel is available. 5. The liquid crystal display device according to claim 1, 2, or 3, wherein when one of the red input sub-pixel, the green input sub-pixel, and the blue input sub-pixel is selected, When the digital value is zero, the W value will be 0 or zero. 6 · If the liquid crystal display device with the scope of patent application No. 1, 2 or 3, characterized in that: the device includes: a storage device, which is used to store each can be expressed by the W = f (Ymin,. Y max) function A plurality of types of functions; and a selection device for selecting any one of the plurality of types of the plurality of functions expressed by the W (fmin, Ymax) function stored by the storage device. 7. The liquid crystal display device according to claim 1, 2, or 3, wherein the configuration of the red output sub-pixel, the green output sub-pixel, and the blue output sub-g pixel can be formed according to a predetermined control signal. The main pixel unit does not need to use the luminescent sub-pixel, thereby making the device a liquid crystal display device capable of color display. O: \ 71 \ 71109-910523.ptc Page 21, 498301, Case No. 90111629, May to May 3rd, Amendment VI, Patent Application Scope 8. If you apply for a liquid crystal display device with the scope of patents No. 1, 2 or 3, according to It is possible to perform an image display with a predetermined control signal, wherein the red output sub-pixel, the green output sub-pixel, and the blue output sub-pixel can be configured as a main pixel unit without using the luminescent sub-pixel; At the same time, an image display in which the red output sub-pixel, the green output sub-pixel, and the blue output sub-pixel are configured as a main pixel unit can use the luminescent sub-pixel. O: \ 71 \ 71109-910523.ptc Page 22