1339376 |〇33年10月1S5接正芸裘頁~| 六、發明說明： ， 【發明所屬之技術領域】 [0001] 本發明係關於一種液晶顯示裝置伽瑪校正表之生成方法 〇 【先前技術】 [0002] 為提高液晶顯示裝置所顯示的影像質量，伽瑪（Gamma)校 正被廣泛使用。目前液晶顯示裝置是用冪函數 y — ^木yr(A、表示常數，X表示視頻訊號，Y表 示圖像亮度或色度）來生成標準伽瑪曲線，通過在該標準 伽瑪曲線上每一灰階對應取一點，然後將所有點包含的 • ·-· * · . Λ. · · ▲ /' ·'· · 視頻訊號訊息與圖像亮度訊杳:之;間的$應關孫儲存來生 成液晶顯示裝置伽瑪校正表F從^根墟智權^瑪校正表對 視頻訊號進行伽瑪校正。 .1339376 |〇33年1月1S5接正芸裘页~| VI. Description of the invention: , [Technical field of invention] [0001] The present invention relates to a method for generating a gamma correction table of a liquid crystal display device 先前 [Prior Art [0002] Gamma correction is widely used to improve the image quality displayed by liquid crystal display devices. At present, the liquid crystal display device generates a standard gamma curve by using a power function y — ^ wood yr (A, representing a constant, X is a video signal, and Y is an image brightness or chromaticity), and each of the standard gamma curves is generated. The grayscale corresponds to take a point, and then all points contain • ··· * · . Λ. · · ▲ /' ·'· · Video signal message and image brightness information: the $ should be stored in Sun The gamma correction table F for generating the liquid crystal display device performs gamma correction on the video signal from the ^根徽智权^玛 calibration table. .
[0003] 然，常數y係對同一批次同一型號之液晶顯示裝置設定 之標準參數，通過該冪函數y — ^^生成之伽瑪曲 線亦係同一批次同一型號之液晶顯示裝置之標準伽瑪曲 線，由於每一液晶顯示裝置内部結構之區別，經該標準 伽瑪曲線生成的伽瑪校正表與每一液晶顯示裝置實際所 需的最佳伽瑪校正表之間存在一定的差距。當視頻訊號 輸入液晶顯示裝置後，該液晶顯示裝置實際顯示的亮度 與最佳的亮度有一定的差距，使該液晶顯示裝置顯示畫 面質量不佳。 【發明内容】 [0004] 有鑑於此，有必要提供一種可對單體液晶顯示裝置進行 096103217 表單編號 A0101 第 4 頁/共 17 頁 0993373637-0 13393.76 __ 099年10月19日核正替換頁 有效校正之液晶顯示裝置伽瑪校正表之生成方法。 [0005] 一種液晶顯示裝置伽瑪校正表之生成方法，其包括如下 步驟’·關閉待檢測之液晶顯示裝置本身所設定之伽瑪校 正功能；系統初始化；分別測量等灰階間隔之複數個單 色灰階畫面之亮度值；採用線性插值計算法，於該複數 個亮度值間取等間隔之複數點獲得亮度特性曲線；計算 獲得理想伽瑪曲線，其中，計算理想伽瑪曲線之公式係 + Anin 其中，L 表示該液晶顯示篆置顯示單色畫面之最大亮度 max 7·： ，亦即灰階為255之單色畫面-之亮度值，L .表示該液晶 min 顯示裝置顯示單色畫面之最小亮度，亦即灰階為〇之單色 畫面之亮度值，i表示0到255階灰階中的任意一階，Li表 示單色畫面第i階灰階畫面對應之亮度，gamma為一常數 ;於該亮度特性曲線中依次查找與該理想伽瑪曲線中自0 灰階至255灰階中各灰階所對應之亮度值最接近之點，並 儲存各點對應之亮度值；將所得之各亮度值依其所對應 灰階之自小至大順序排列生成伽瑪校正表。 [0006] 相較於先前技術，本發明之液晶顯示裝置伽瑪校正表之 生成方法僅需對單體液晶顯示裝置測量R、G、B各單色較 少灰階畫面對應之亮度，於該複數個亮度值間取等間隔 之複數點獲得亮度特性曲線，將該亮度特性曲線與理想 伽瑪曲線對比從而快速生成更為準確之伽瑪校正表，可 對單體液晶顯示裝置進行有效伽瑪校正。 096103217 表單編號A0101 第5頁/共17頁 0993373637-0 1339376 [0007] [0008] [0009] [0010] [0011] 096103217 | 〇S>3年1G月1!3 5接正菩挨頁~| 【實施方式】 本發明之液晶顯示裝置伽瑪校正表之生成方法需應用一 系統，其包括一訊號發生器、一色彩分析儀及一待測之 液晶顯示裝置。該訊號發生器包括一暫存器，該液晶顯 示裝置包括一記憶體。 該訊號發生器分別與該液晶顯示裝置及該色彩分析儀連 接，其產生之視頻訊號使該液晶顯示裝置顯示圖像；該 色彩分析儀用於讀取該液晶顯示裝置所顯示圖像之亮度 ，該亮度值被儲存於該訊號發生器之暫存器中。該液晶 顯示裝置之記憶體用於儲存生成之伽瑪校正表。 請參閱圖1，係本發明液晶#蒙'置傪禱後正表生成方法 之流程圖。該液晶顯示裝置生:戒」方法包括如 下步驟： 步驟si，關閉伽瑪功能。液晶顯示裝置開始工作前，通 過一軟體設置該待檢測的液晶顯示裝置本身所設定的伽 瑪校正表不傳給驅動程序，以關閉該液晶顯示裝置之伽 瑪校正功能。 步驟S2，系統初始化。初始化該訊號發生器、該色彩分 析儀及該液晶顯示裝置。設置該訊號發生器產生不同的 視頻訊號，該視頻訊號對應不同之R色灰階，設該灰階總 個數為64，該64個灰階分別為第0、1、2.....62、63 個灰階，該64個灰階之亮度分別對應該液晶顯示裝置之 0-255灰階中之第0、4、8 ..... 248、252階灰階之亮度 。設置該色彩分析儀讀取的數值為該液晶顯示裝置所顯 示畫面之亮度值。 表單編號A0101 第6頁/共17頁 0993373637-0 13393.76 _ 099年10月19日修正替換頁 [0012] 步驟S3,設置第m個灰階畫面。該訊號發生器產生一視頻 訊號，該視頻訊號使該液晶顯示裝置顯示第m(m = 0、1、 2、…、62、63)個灰階R色畫面。 [0013] 步驟S4，讀取該液晶顯示裝置顯示畫面之亮度值。該液 晶顯示裝置接收該視頻訊號後顯示第m個灰階R色畫面。 由於液晶在電場中旋轉需要一定的時間，故延遲數秒， 通常為1秒，待該液晶顯示裝置顯示畫面亮度穩定後，通 過該色彩分析儀讀取該液晶顯示裝置的亮度值，即該顯 示裝置實際顯示的圖像亮度。該亮度值被儲存於該訊號 發生器之暫存器中。 [0014] 步驟S5，設置下一個灰階畫：Si。·該訊號發生器產生一視 頻訊號，該視頻訊號使該液盖顯示裝置顯示第（m + 1 MUIR 色灰階畫面。 [0015] 步驟S6，判斷測量是否結束。判斷該訊號發生器之暫存 器中所儲存R色對應之亮度值的總個數是否大於64，若否 ，則執行步驟S4 ;若是，則執行步驟S7。步驟S7，獲取 單色畫面亮度特性曲線。請一併參閱圖2，其係該液晶顯 示裝置亮度特性.曲線示意圖，該亮度特性曲線係採用線 性插值計算法生成。該亮度特性曲線1之橫座標Μ表示灰 階之個數，其範圍係0~63 ;縱座標Ρ表示亮度。點Ρ0、 PI ' Ρ2.....Ρ62、Ρ63分別表示儲存於該訊號發生器之 暫存器中之該液晶顯示裝置顯示64個灰階R畫面之亮度值 。由該點Ρ0、Ρ1可確定一條直線。在該直線上，於該點 Ρ0與點Ρ1之間，取等間隔且單調上升之15個點AO、Α1、 …、A14。根據相同原理，點Ρ1、Ρ2亦確定一條直線，於 096103217 表單編號A0101 第7頁/共17頁 0993373637-0 1339376 |〇33年10月13日接正替接·^] 該點P1與點P2之間，亦取等間隔且單調上升之1,5個點， 即A15、A16.....A29。依此類推，點P1與點P62之間任 意相鄰二點間都插入15個值。點P62、P63亦確定一條直 線，在該直線上，於點P63之二側分別取等灰階間隔之15 個點，即A931、A932 .....A959、A960。由此，在第 0 個灰階與第255階灰階之間一共得到1 024個點，該1024 個點分別對應0、1、2 ..... 1 022、1 023等1 024個數值 ，該1 024個點形成一條曲線，即該液晶顯示裝置R色對應 的亮度特性曲線1。 [0016] 步驟S8，計算理想伽瑪曲線。通過該色彩分析儀測量該 液晶顯示裝置顯示R色畫面亮亦即灰階為 255之R色畫面之亮度值環可通過以下 公式得到： [0017] [0018] ✓ \ gamma ~ (^max ^min)* ^min v255> 其中，L .表示該液晶顯示裝置顯示R畫面之最小亮度 min ，亦即灰階為0之R色畫面之亮度值，i表示0到255階灰階 中的任意一階，Li表示R畫面第i階灰階畫面對應之亮度 ，gamma代表一常數，其係針對該液晶顯示裝置所屬型號 及批次之液晶顯示裝置之設定值。當i依次取0到255之間 的數值時，即得到256個數值L0、L1.....L254、L255 。請參閱圖3，其係該液晶顯示裝置R色理想伽瑪曲線示 意圖。該理想伽瑪曲線2之橫座標I表示灰階，其範圍係 096103217 表單編號A0101 第8頁/共17頁 0993373637-0 1339376 099年10月19日梭正替換頁 0 ~ 2 5 5 其縱座標L表示亮度。該理想伽瑪曲線2係由該 256個數值L0、L1.....L254、L255分別對應之256個 點連接而成。 [0019] 步驟S9，設定灰階階數為i。設R色待校正之灰階之階數 為 i(i = 0、1、2 ..... 254、255)。 [0020] 步驟S10，校正第i階灰階。請參閱圖4，其係本發明灰階 校正方法示意圖。將步驟S7中獲得之亮度特性曲線1與步 驟S8中獲得之理想伽瑪曲線2置於同一座標平面中，其橫 座標I表示灰階，其範圍係0~255 ;其縱座標Y表示亮度。 點Q (n = 0、1、2 ..... 1 022、1 023)分別表示該亮度特 η .、：. 性曲線1上單調上升之1 024個:點；點q.(i = 0、1、2、… v x, 、254、255)分別表示該理想伽瑪曲線2上對應第i階灰 階之256個點。在點Q中查找與點ci.之縱座標即其亮度 η 1 最相近的點，並記錄該點所對應之數值η。 [0021] 步驟S11，設置下一階灰階。設下一個待校正的灰階階數 為i + Ι。步驟S12，判斷校正是否完畢。判斷該灰階階數 1 + Ι是否大於255，若否，則執行步驟S10 ;若是，則執 行步驟S13。 [0022] 步驟S13，生成伽瑪校正表。將儲存在該訊號發生器之暫 存器中校正後之256個數值η依其所對應灰階之自小至大 順序排列，即得到R色對應的伽瑪校正表。依據相同原理 ，可得G色、Β色對應之伽瑪校正表。該數值η代表對應一 灰階之亮度。 [0023] 步驟S14，燒錄伽瑪校正表。將上述R、G、Β三組伽瑪校 096103217 表單編號Α0101 第9頁/共17頁 0993373637-0 1339376 [^年ίϋ月核正替换百| 正表分別燒錄於該液晶顯示裝置之記憶體中。該伽瑪校 正表之作用在於，該液晶顯示裝置顯示一視頻訊號時， 該伽瑪校正表對該視頻訊號之R、G、B各灰階亮度進行校 正。 [0024] 上述步驟S6中所測得單色畫面亮度值之總數不限於64， 其亦可係32、128等’即分別測量灰階為〇、8.....244 、252之凴度值，或分別測量灰階為〇、2、4、...、250 、252之亮度值。如果所測量之灰階個數小於64，如32， 則採用貝齊爾（Bezier)插值計算法可得到更加準確之亮 度特性曲線。 [0025] 貝齊爾插值計算法生成亮度雜之^^^£嫌：該色彩 分析儀所測量之該液晶顯示灰階畫面 之亮度值分別對應一灰階-亮度座標平面（圖未示）中之32 個點DO、D1、D2、…、D30、D31。其中，點DO、D1、 D2三點可確定一條貝齊爾曲線》在該貝齊爾曲線上，於 點D0與D1之間，取等灰階間隔的31個點。根據相同原理 ，點Dl、D2、D3亦破定一條貝齊爾曲線，於點j)i與D2之 間，亦取等灰階間隔之31個點’依此類推，則點])〇與點 D30之間的任意相鄰二點間都插入3】個值。且於點D29、 D30、D31確定的貝齊爾曲線上，於點D31二側分別取等 灰階間隔的31個點，則在第0階灰階與第2 5 5階灰階之間 一共得到1024個點，該1024個點分別對應數〇、1、2、 …、1 0 2 2、10 2 3。該1 0 2 4個點形成一條曲線，即該液晶 顯示裝置R顏色對應的亮度特性曲線。依據相同原理，亦 可得G、B顏色對應的亮度特性曲線。 096103217 表單編號A0101 第10頁/共17頁 0993373637-0 1339376 099年10月19日核正替換頁 [0026] 相較於先前技術，本發明之液晶顯示裝置伽瑪校正表之 生成方法僅需對單體液晶顯示裝置測量R、G、B各單色較 少灰階畫面對應之亮度，通過插值計算得到亮度特性曲 線，並將其與理想伽瑪曲線對比從而快速生成更為準確 之伽瑪校正表，適合於對單體液晶顯示裝置進行有效伽 瑪校正。 [0027] 綜上所述，本發明確已符合發明之要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施方式， 本發明之範圍並不以上述實施方式為限，舉凡熟習本案 技藝之人士援依本發明之精神所作之等效修飾或變化， 皆應涵蓋於以下申請專利範圍.内。 【圖式簡單說明】 [0028] 圖1係本發明液晶顯示裝置置伽瑪校正表生成方法之流程 圖。 [0029] 圖2係液晶顯示裝置亮度特性曲線示意圖。 [0030] 圖3係本發明理想伽瑪曲線示意圖。 [0031] 圖4係本發明灰階校正方法示意圖。 【主要元件符號說明】 [0032] 無 096103217 表單編號A0101 第1]頁/共17頁 0993373637-0[0003] However, the constant y is a standard parameter set for the same batch of the same type of liquid crystal display device, and the gamma curve generated by the power function y - ^^ is also the standard gamma of the same batch of the same type of liquid crystal display device. According to the difference of the internal structure of each liquid crystal display device, there is a certain gap between the gamma correction table generated by the standard gamma curve and the optimal gamma correction table actually required for each liquid crystal display device. When the video signal is input to the liquid crystal display device, the brightness actually displayed by the liquid crystal display device is different from the optimum brightness, so that the liquid crystal display device displays poor picture quality. SUMMARY OF THE INVENTION [0004] In view of this, it is necessary to provide a single liquid crystal display device 096103217 Form No. A0101 Page 4 of 17 0993373637-0 13393.76 __ October 19, 1999 nuclear replacement page is valid A method of generating a corrected gamma correction table for a liquid crystal display device. [0005] A method for generating a gamma correction table of a liquid crystal display device, comprising the steps of: - turning off a gamma correction function set by the liquid crystal display device to be detected; system initialization; separately measuring a plurality of orders of gray scale intervals The brightness value of the gray scale picture; using the linear interpolation calculation method, the brightness characteristic curve is obtained by taking the equal number of complex points between the plurality of brightness values; calculating the ideal gamma curve, wherein the formula for calculating the ideal gamma curve is + Anin, where L indicates that the liquid crystal display device displays the maximum brightness max 7·: of a monochrome picture, that is, the brightness value of a monochrome picture with a gray level of 255, and L. indicates that the liquid crystal min display device displays a monochrome picture. The minimum brightness, that is, the brightness value of the monochrome picture with gray scale is ,, i represents any order of 0 to 255 gray scales, Li represents the brightness corresponding to the i-th gray scale picture of the monochrome picture, gamma is a constant And searching for the closest point to the brightness value corresponding to each gray level in the ideal gamma curve from 0 gray scale to 255 gray scale in the brightness characteristic curve, and storing the corresponding bright points of each point Value; each of the luminance values obtained in accordance with its corresponding gray scale in ascending order of childhood order to generate the gamma correction table. [0006] Compared with the prior art, the method for generating a gamma correction table of the liquid crystal display device of the present invention only needs to measure the brightness corresponding to each of the R, G, and B monochrome grayscale pictures of the single liquid crystal display device. A plurality of equal brightness points are equally spaced to obtain a brightness characteristic curve, and the brightness characteristic curve is compared with an ideal gamma curve to quickly generate a more accurate gamma correction table, which can perform effective gamma on the single liquid crystal display device. Correction. 096103217 Form No. A0101 Page 5 of 17 0993373637-0 1339376 [0007] [0009] [0010] [0011] 096103217 | 〇S> 3 years 1G month 1! 3 5 接正菩挨 page~| [Embodiment] The method for generating a gamma correction table of a liquid crystal display device of the present invention needs to apply a system including a signal generator, a color analyzer, and a liquid crystal display device to be tested. The signal generator includes a register, and the liquid crystal display device includes a memory. The signal generator is respectively connected to the liquid crystal display device and the color analyzer, and the generated video signal causes the liquid crystal display device to display an image; the color analyzer is configured to read the brightness of the image displayed by the liquid crystal display device, The brightness value is stored in a register of the signal generator. The memory of the liquid crystal display device is used to store the generated gamma correction table. Please refer to FIG. 1 , which is a flow chart of a method for generating a positive surface of a liquid crystal of the present invention. The method for generating a liquid crystal display device includes the following steps: Step si, turning off the gamma function. Before the liquid crystal display device starts working, the gamma correction table set by the liquid crystal display device to be detected by a software is not transmitted to the driver to turn off the gamma correction function of the liquid crystal display device. In step S2, the system is initialized. The signal generator, the color analyzer, and the liquid crystal display device are initialized. The signal generator is configured to generate different video signals, and the video signals correspond to different R color gray levels, and the total number of gray levels is 64, and the 64 gray levels are 0, 1, 2, respectively. 62, 63 gray scales, the brightness of the 64 gray scales respectively correspond to the brightness of the 0th, 4th, 8th, ..., 248, 252th gray scale of the 0-255 gray scale of the liquid crystal display device. The value read by the color analyzer is set to be the brightness value of the screen displayed by the liquid crystal display device. Form No. A0101 Page 6 of 17 0993373637-0 13393.76 _ October 19, 2017 Correction Replacement Page [0012] Step S3, setting the mth grayscale picture. The signal generator generates a video signal that causes the liquid crystal display device to display mth (m = 0, 1, 2, ..., 62, 63) grayscale R color pictures. [0013] Step S4, reading the brightness value of the display screen of the liquid crystal display device. The liquid crystal display device displays the mth grayscale R color picture after receiving the video signal. Since the liquid crystal needs to rotate for a certain period of time in the electric field, the delay is several seconds, usually 1 second. After the brightness of the display screen of the liquid crystal display device is stabilized, the brightness value of the liquid crystal display device is read by the color analyzer, that is, the display device The brightness of the image actually displayed. The brightness value is stored in the register of the signal generator. [0014] Step S5, setting the next grayscale painting: Si. The signal generator generates a video signal, and the video signal causes the liquid cover display device to display the (m + 1 MUIR color gray scale screen. [0015] Step S6, determining whether the measurement is over. Judging the temporary storage of the signal generator Whether the total number of brightness values corresponding to the R color stored in the device is greater than 64, if not, proceeding to step S4; if yes, executing step S7. Step S7, obtaining a monochrome picture brightness characteristic curve. Please refer to FIG. 2 together. The brightness characteristic curve of the liquid crystal display device is generated by a linear interpolation calculation method. The abscissa of the brightness characteristic curve 1 indicates the number of gray levels, and the range is 0 to 63; Ρ indicates brightness. Point Ρ0, PI ' Ρ2.....Ρ62, Ρ63 respectively indicate that the liquid crystal display device stored in the register of the signal generator displays the brightness values of 64 gray-scale R pictures. Ρ0, Ρ1 can determine a straight line. On this line, between the point Ρ0 and point Ρ1, take 15 points AO, Α 1, ..., A14 that are equally spaced and monotonically rising. According to the same principle, point Ρ1, Ρ2 also Determine a straight line at 096103 217 Form No. A0101 Page 7 of 17 0993373637-0 1339376 | 10 10 10 10 10 10 10 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ The points are A15, A16.....A29. And so on, 15 values are inserted between any adjacent two points between point P1 and point P62. Points P62 and P63 also determine a straight line on the line. At the two sides of the point P63, 15 points of the gray-scale interval are respectively taken, that is, A931, A932 ..... A959, A960. Thus, a total of between the 0th gray level and the 255th order gray level is obtained. 1 024 points, the 1024 points correspond to 0, 1, 2 ..... 1 022, 1 023 and other 1,024 values, the 1,024 points form a curve, that is, the liquid crystal display device R color corresponding The brightness characteristic curve is 1. [0016] Step S8, calculating an ideal gamma curve, and measuring, by the color analyzer, that the liquid crystal display device displays the R color picture, that is, the brightness value ring of the R color picture with the gray level of 255 can pass the following formula [0018] ✓ \ gamma ~ (^max ^min)* ^min v255> wherein L. indicates that the liquid crystal display device displays the minimum brightness min of the R picture, that is, the gray level The luminance value of the R color picture of 0, i represents any order of 0 to 255 gray scales, Li represents the brightness corresponding to the i th order gray scale picture of the R picture, and gamma represents a constant for the liquid crystal display device to which The set value of the model and batch of liquid crystal display device. When i sequentially takes a value between 0 and 255, 256 values L0, L1, ..., L254, L255 are obtained. Please refer to FIG. 3, which is a schematic diagram of the color ideal gamma curve of the liquid crystal display device R. The horizontal coordinate I of the ideal gamma curve 2 represents a gray scale, and its range is 096103217. Form number A0101 Page 8 / Total 17 pages 0993373637-0 1339376 October 19, 1999 Shuttle replacement page 0 ~ 2 5 5 Its ordinate L represents the brightness. The ideal gamma curve 2 is formed by connecting 256 points corresponding to the 256 values L0, L1, ..., L254, and L255. [0019] Step S9, setting the gray level order to i. Let the order of the gray scale to be corrected by the R color be i (i = 0, 1, 2 ..... 254, 255). [0020] Step S10, correcting the i-th gray scale. Please refer to FIG. 4, which is a schematic diagram of the gray scale correction method of the present invention. The luminance characteristic curve 1 obtained in the step S7 is placed in the same coordinate plane as the ideal gamma curve 2 obtained in the step S8, and the horizontal coordinate I represents the gray scale, and the range is 0 to 255; and the ordinate Y represents the luminance. Point Q (n = 0, 1, 2 ..... 1 022, 1 023) respectively represents the luminance characteristic η.,: 1. 1 024 monotonically rising on the property curve 1: point; point q. (i = 0, 1, 2, ... vx, 254, 255) respectively represent 256 points corresponding to the i-th gray scale on the ideal gamma curve 2. Find the point closest to the ordinate of the point ci., that is, its luminance η 1 , at point Q, and record the value η corresponding to the point. [0021] Step S11, setting the next gray scale. Set the next gray level order to be corrected to i + Ι. In step S12, it is judged whether or not the correction is completed. It is judged whether or not the gray scale order 1 + Ι is greater than 255. If not, step S10 is performed; if so, step S13 is executed. [0022] Step S13, generating a gamma correction table. The 256 values η corrected in the register of the signal generator are arranged in descending order of the corresponding gray scales, that is, the gamma correction table corresponding to the R color is obtained. According to the same principle, a gamma correction table corresponding to G color and Β color can be obtained. This value η represents the brightness corresponding to a gray scale. [0023] Step S14, burning the gamma correction table. The above-mentioned R, G, and 组 three sets of gamma schools 096103217 Form No. 101 0101 Page 9 / Total 17 pages 0993373637-0 1339376 [^年ϋ月核正正正百版] The positive table is separately burned in the memory of the liquid crystal display device in. The function of the gamma correction table is that when the liquid crystal display device displays a video signal, the gamma correction table corrects the gray scale brightness of the R, G, and B of the video signal. [0024] The total number of monochrome picture brightness values measured in the above step S6 is not limited to 64, and may also be 32, 128, etc., that is, measuring the gray scales of 〇, 8.....244, 252 respectively. Value, or measure the brightness values of gray scales 〇, 2, 4, ..., 250, 252, respectively. If the number of gray scales measured is less than 64, such as 32, a more accurate brightness characteristic curve can be obtained by using Bezier interpolation calculation. [0025] Bezier interpolation calculation method generates brightness miscellaneous ^^^^: The brightness value of the liquid crystal display gray scale picture measured by the color analyzer corresponds to a gray scale-luminance coordinate plane (not shown) 32 points DO, D1, D2, ..., D30, D31. Among them, the points DO, D1, and D2 can determine a Bezier curve on the Bezier curve, between points D0 and D1, taking 31 points of the gray-scale interval. According to the same principle, points Dl, D2, and D3 also break a Bezier curve. Between points j)i and D2, 31 points of the gray-scale interval are also taken, and so on. Three values are inserted between any adjacent two points between points D30. And on the Bezier curve determined by points D29, D30, and D31, 31 points of the gray-scale interval are respectively taken on the two sides of the point D31, and a total of between the 0th order gray level and the 2255th order gray level. 1024 points are obtained, which correspond to numbers 1、, 1, 2, ..., 1 0 2 2, 10 2 3 respectively. The 1 0 2 4 dots form a curve, that is, a luminance characteristic curve corresponding to the color of the liquid crystal display device R. According to the same principle, the brightness characteristic curves corresponding to the G and B colors can also be obtained. 096103217 Form No. A0101 Page 10 of 17 0993373637-0 1339376 October 19, 1999, the replacement page [0026] Compared with the prior art, the method for generating the gamma correction table of the liquid crystal display device of the present invention only needs to be The single liquid crystal display device measures the brightness corresponding to the grayscale images of R, G, and B, and obtains the brightness characteristic curve by interpolation calculation, and compares it with the ideal gamma curve to quickly generate more accurate gamma correction. The table is suitable for effective gamma correction of a single liquid crystal display device. [0027] In summary, the present invention has indeed met the requirements of the invention, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. It should be covered in the scope of the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS [0028] FIG. 1 is a flow chart showing a method of generating a gamma correction table in a liquid crystal display device of the present invention. 2 is a schematic diagram showing a brightness characteristic curve of a liquid crystal display device. 3 is a schematic diagram of an ideal gamma curve of the present invention. 4 is a schematic diagram of a gray scale correction method of the present invention. [Description of main component symbols] [0032] None 096103217 Form No. A0101 Page 1 of 17 0993373637-0