TWI236656B

TWI236656B - Method and device of compensating brightness for LCD

Info

Publication number: TWI236656B
Application number: TW93101427A
Authority: TW
Inventors: Yih-Liang Lu; Yi-Fan Chen; Cheng-Jung Chen; Yuh-Ren Shen
Original assignee: Vastview Tech Inc
Priority date: 2004-01-19
Filing date: 2004-01-19
Publication date: 2005-07-21
Also published as: TW200525480A

Abstract

A method of compensating brightness for LCD includes measuring the original gamma curve of LCD panel, predeterminating a target gamma curve, inputting an initial gray level to figure out the brightness matching on the target gamma curve, finding out an adjusted gray level performing the brightness by the original gamma curve, and repeating above steps to result a lookup table having a plurality of proportion arrays. Thereafter the method further includes calculating the amount distribution of the input gray levels of the image, selecting a matching proportion array from the lookup table according proportion of the dark region and the bright region, substituting the adjusted gray levels for the input gray levels, and outputting the adjusted gray levels to adjust the signal strength and improve image performance. A device is also claimed. The method and device of compensating brightness for LCD are applicable to image adjustment of various LCD or similar displays.

Description

^36656 五、發明說明〇) Γ發明所屬之技術領域4 ，& %係關於—種 =指-種調整輸入訊號強，=度補償之方法及裝置方法及裝置，適用致較佳影像品質之亮之y像調整。、各種液曰曰顯示器或類似顯示器【先前技術】 _液晶1員示器之流行及高影像品質等優點，。芏要是其具有低耗電、重量輕薄電腦螢幕，因而^漸取可應用於數位電視、筆記型電腦或顯示器產業之主流'，然=傳統陰極射線管（c R τ )成為係數、介電常數以及&文限於液晶分子之特性，諸如黏滯間過久與殘影現象之 ^係數等，液晶顯示器會有響應時器的影像晝面有亮度不題’尤其相對於C R Τ，液晶顯示之影像如夜景，則顯示=之問題，若輸入畫面屬於較灰暗觀員者無法看到影像^ f產生之受度或對比顯得不足，使景’像，如背光情況下、、、節，若輸入晝面屬於反差過大之灰階值較多，使得晝面$攝之晝面，則較亮及較暗之影像亮，兩區域的晝面^無、、較暗的區域偏暗、較亮的區域偏上會設有亮度對比調^ ^顯示細腻的層次感，通常顯示器和對比，使影像較清二顴> 賞者可手動調整影像之亮度於動態影像觀賞來說非^色衫豐富，然而這種手動調整對快速多樣，單一亮度和&麻煩，因為動態影像之晝面切換因此須藉由顯示器内部二比比例難以適應各種場面影像，晝面之層次更明顯。°早元調整，加強影像對比程度，使^ 36656 V. Description of the invention 0) Γ The technical field to which the invention belongs 4 &% refers to the method and device method and device for adjusting the input signal strength and the degree compensation, which are suitable for the better image quality Bright y image adjustment. Various liquid display or similar displays [Prior technology] _The popularity of LCD 1-person display and the advantages of high image quality.芏 If it has a low power consumption and a thin computer screen, it will gradually take the mainstream that can be applied to the digital TV, notebook computer or display industry ', then = traditional cathode ray tube (c R τ) becomes a coefficient and dielectric constant And & text is limited to the characteristics of liquid crystal molecules, such as the long coefficient of stickiness and the residual coefficient of afterimage phenomenon, etc., the liquid crystal display will respond to the image of the timer. If the image is a night scene, the problem of = is displayed. If the input screen is darker, the viewer cannot see the image ^ f The degree of acceptance or contrast generated by f appears insufficient, making the scene 'image, such as backlight, ,, and festival. The diurnal surface has too many grayscale values with too much contrast, so that the diurnal surface is more bright and darker than the diurnal image. The diurnal surface of the two areas is dark, and the darker areas are darker and brighter. On the upper side of the area, there will be a brightness contrast adjustment ^ ^ to display a delicate layering sense. Usually, the display and contrast make the image clearer.> The viewer can manually adjust the brightness of the image. It is not rich in color shirts for dynamic image viewing However this hand The dynamic adjustment pairs are fast and diverse, with single brightness and & trouble, because the day-to-day switching of dynamic images must be difficult to adapt to various scene images through the internal two-scale ratio of the display, and the level of the day-and-day is more obvious. ° Early adjustment, strengthen the contrast of the image, make

第9頁 1236656 、發明說明（2) 請參閱第1圖，習知技術為了加強影像，調整方法’將灰階亮度控制裂置設置於液晶顯示：：：；驅動器上’當糸統判斷出影像之亮度不足或對比 i 將原始伽瑪赭線調升為調整伽瑪曲線，亦卽技A s 寸，提昇，相對地顯示器亮度亦提高，使影像：”产改善，然而此種技術有以下缺點： σ冗度獲得、於顯示器内部需另設一控制裝置以控制纟顯示器内部耗電量增加及資源消耗。交’使、每一顯示器面特性皆不同，而控制f置一法針對不同面板特性作調整，對影像特性無不夠彈性。控制此力顯得有鑑於此，本案之發明人提供一，與其裝置，以改善上述之缺點。種新穎之免度補償方發明内容】本發明之主要目的係在提供一種考慮液晶顯示器面板特性，以處Kc方法 ·、、、員π器之影像品質。 ’、像汛號之方法改善本舍明之另一目的係在提供一種卑 ^ 二利用對照表之簡單對應、，快速 :3之允度補償方法灰階值。决速獲仔適當亮度表現之調整，用巧係在提供一種新穎之亮度補償裝置 ;;示器晝面法可灰階值改之應用。仏各式液晶顯示器面板第10頁 1236656 五、發明說明（3) 為了達到上述之發明目的，本案之方法包含： (1 )量測面板之原始伽瑪曲線； (2 )設定一目標伽瑪曲線； (3 )輸入一初始灰階值得到對應於目標伽瑪曲線之亮度，於原始伽瑪曲線上找出表現該亮度之調整灰階值 j (4 )重複上述（2 )至（3 )步驟產生複數組初始灰階值與複數組調整灰階值，將該複數組調整灰階值歸納為一比例陣列；Page 1236656, description of the invention (2) Please refer to Figure 1. In order to enhance the image, the conventional technology adjusts the method of “setting the gray level brightness control on the LCD display :: ;; on the driver, when the system judges the image Insufficient brightness or contrast i The original gamma line is adjusted to adjust the gamma curve, which also increases the A s inch, and the brightness of the display is also increased, which makes the image: "Production is improved, but this technology has the following disadvantages ： Obtained σ redundancy, another control device needs to be set up inside the display to control the increase of power consumption and resource consumption inside the display. The characteristics of each display surface are different, and the method of controlling f is set for different panel characteristics. The adjustment is not flexible enough for the characteristics of the image. Controlling this force seems to be in view of this. The inventor of the present case provides one, and its device, to improve the above-mentioned disadvantages. A novel exemption compensator. SUMMARY OF THE INVENTION In order to provide a method to consider the characteristics of the LCD panel and use the Kc method, the image quality of the π device. The other purpose is to provide a simple and fast correspondence using the comparison table. The gray scale value of the tolerance compensation method of 3 is fast. Get the adjustment of the appropriate brightness performance quickly, and use it to provide a novel brightness compensation. Device ;; Indicator day-surface method can be used to change the gray scale value. 仏 Various types of liquid crystal display panels Page 10 1236656 V. Description of the invention (3) In order to achieve the above-mentioned invention purpose, the method of this case includes: (1) measurement The original gamma curve of the panel; (2) Set a target gamma curve; (3) Enter an initial grayscale value to obtain the brightness corresponding to the target gamma curve, and find the adjusted gray that represents the brightness on the original gamma curve The step value j (4) repeats the steps (2) to (3) above to generate the initial gray scale value of the complex array and the adjusted gray scale value of the complex array, and summarizes the adjusted gray scale value of the complex array into a proportional array;

(5)重複上述（2)至（4)步驟於不同目標曲線下產生複數組比例陣列以製成一對照表； (6 )計算影像之輸入灰階值的數量分布； (7 )分別計算暗階比例和亮階比例； (8 )依據暗階比例之大小從暗階對照表中選擇一對應之比例陣列，以該比例陣列内之調整灰階值取代輸入灰階值；(5) Repeat the above steps (2) to (4) to generate a complex array proportional array under different target curves to make a comparison table; (6) Calculate the number distribution of the input grayscale values of the image; (7) Calculate the dark Scale ratio and light scale ratio; (8) Select a corresponding scale array from the dark scale comparison table according to the size of the dark scale ratio, and replace the input gray scale value with the adjusted gray scale value in the scale array;

(9 )依據亮階比例之大小從亮階對照表中選擇一對應之比例陣列，以該比例陣列内之調整灰階值取代輸入灰階值；以及 (1 0 )將調整後之灰階值輸出以調整訊號強度改善影像品質。本發明中，用以執行上述方法之裝置包含：一色階分布分析單元，用以接收影像訊號，並對每一輸入灰階值之分布數計數以獲得色階分布狀態；(9) Select a corresponding scale array from the brightness comparison table according to the size of the brightness scale, and replace the input gray scale value with the adjusted gray scale value in the scale array; and (1 0) change the adjusted gray scale value Output to adjust signal strength to improve image quality. In the present invention, the device for performing the above method includes: a color gradation distribution analysis unit for receiving an image signal and counting the number of distributions of each input gray level value to obtain a color gradation distribution state;

第11頁 l236656 &、發明說明（4) 二對照表儲存單元，用以儲存對照表；以及數魅二ί階運算單元，用以計算色階比例，並代入± 比例陣二么U Τ強度以對應至對照表内之比例陣列換函 #】内之調整灰階值取代輸入灰階值並輪出之以此藉以調整輸入訊號源的強度，以獲得較佳 ^，。之％像品質為了對本發明有更深入之瞭解，茲藉具體於後。也例詳述【實施方式】請參閱第2圖，以1 〇 b i t之液晶顯示器而$Page 11 l236656 & Description of the invention (4) Two comparison table storage unit for storing the comparison table; and two-magnitude second-order arithmetic unit for calculating the gradation ratio, and substituted into the ± proportional matrix two U U intensity Replace the input grayscale value with the adjusted grayscale value corresponding to the proportional array conversion function #] in the comparison table and rotate it to adjust the intensity of the input signal source to obtain better ^. In order to have a deeper understanding of the present invention, the details are as follows. Also detailed description [Embodiment] Please refer to FIG. 2 for a liquid crystal display of 10 bt.

一影像畫面具有1 0 2 4個灰階值，將存在於影像:’每之各個灰階值數量作運算統計，得到一色階分布圖了 =内將總灰階範圍之一比例以下之範圍設定為暗階區2 } 了 2 總灰階範圍之一比例以上之範圍設定為亮階區2 2 ，在本發明之較佳實施例中設定暗階區之範圍係總灰階範圍之前四分之一灰階範圍，即灰階值〇至2 5 6 ，亮階區之範圍設定為總灰階範圍之後四分之一灰階範圍，即灰階值7 6An image screen has 10 2 4 gray scale values, which will exist in the image: 'Each number of each gray scale value is calculated and calculated, and a color gradation distribution map is obtained. = The range below one ratio of the total gray scale range is set. The dark level region 2} is set to a range above one percentage of the total gray level range as the light level region 2 2. In the preferred embodiment of the present invention, the range of the dark level region is set to be a quarter of the total gray level range. A gray scale range, that is, the gray scale value is 0 to 2 5 6, and the range of the bright scale area is set to a quarter of the gray scale range after the total gray scale range, that is, the gray scale value is 7 6

8至1 0 2 4 ，再定義暗階比例為暗階區2 1内灰階數量 2 3佔總灰階數量之比例；亮階比例係指亮階區2 2内灰階數量2 4佔總灰階數量之比例。請參閱第3圖，以一較佳實施例來說明如何建立提昇液晶顯示器面板之亮度所依據之對照表，其方法如下： (1 )首先量測液晶顯示器之面板得到一原始伽瑪曲線1 0 ;8 to 1 0 2 4, and then define the dark level ratio as the dark level area 2 1 the number of gray levels 2 3 in the total gray level number; the light level ratio refers to the light level area 2 2 the gray level number 2 4 accounts for the total The ratio of the number of gray levels. Referring to FIG. 3, a preferred embodiment is used to explain how to establish a comparison table on which the brightness of a liquid crystal display panel is improved. The method is as follows: (1) First measure the panel of the liquid crystal display to obtain an original gamma curve 10 ;

第12頁 1236656 五、發明說明（5) (2 )設定一目標伽瑪曲線1 1 ; (3 )輸入一初始灰階值X i (標號1 2 )得到對應於目標伽瑪曲線1 1之亮度Y i (標號1 3 )，於原始伽瑪曲線1 0上找出表現該亮度之調整灰階值X 2 (標號 14); (4 )重複上述（2 )至（3 )步驟產生複數組初始灰階值X i與複數組調整灰階值X 2，將該複數組調整灰階值歸納為一比例陣列；以及1236656 on page 12 5. Description of the invention (5) (2) Set a target gamma curve 1 1; (3) Enter an initial gray level value X i (label 1 2) to obtain the brightness corresponding to the target gamma curve 11 1 Y i (label 1 3), find the adjusted grayscale value X 2 (label 14) representing the brightness on the original gamma curve 10; (4) repeat the steps (2) to (3) above to generate a complex array initial The gray level value X i and the complex array adjustment gray level value X 2, and the complex array adjustment gray level value is summarized into a proportional array; and

(5)重複上述（2)至（4)步驟於不同目標曲線下產生複數組比例陣列以製成一對照表。如第4圖所示，以1 0 b i t之顯示解析度而言，分別依暗階區及亮階區設計暗階對照表4 1及亮階對照表4 2 ，其中暗階對照表4 1選擇8組初始灰階值4 3以及包含6組比例陣列之比例陣列組4 4 ，亮階對照表4 2選擇 8組初始灰階值4 3 ’及包含7組比例陣列之比例陣列組4 4 ’，各比例陣列組4 4、4 4 ’包含與初始灰階值4 3 、 4 3 ’對應之調整灰階值4 6、4 6 ’ 。(5) Repeat steps (2) to (4) above to generate a complex array proportional array under different target curves to make a comparison table. As shown in Figure 4, in terms of the display resolution of 10 bits, the dark level comparison table 41 and the light level comparison table 4 2 are respectively designed according to the dark level and the light level region, and the dark level control table 41 is selected. 8 sets of initial gray scale values 4 3 and a proportional array group 4 4 containing 6 sets of proportional arrays, and a light level comparison table 4 2 Selects 8 sets of initial gray scale values 4 3 ′ and a proportional array group containing 7 sets of proportional arrays 4 4 ′ Each scale array group 4 4 and 4 4 ′ includes adjusted gray scale values 4 6 and 4 6 ′ corresponding to the initial gray scale values 4 3 and 4 3 ′.

當影像資料輸入後，計算影像之輸入灰階值之數量分布，得到如第2圖之色階分布圖，分別計算暗階比例和亮階比例，依據暗階比例之大小從暗階對照表4 1之比例陣列組4 4中選擇一對應之比例陣列，若暗階比例越高，貝1J 於暗階對照表4 1之比例陣列組4 4中選擇越強之比例陣列，如標號4 5所示，暗階比例與暗階對照表4 1的比例陣列之對應方法係將暗階比例代入一暗階轉換函數得到一After the image data is input, calculate the number distribution of the input grayscale values of the image to obtain the color gradation distribution map as shown in Figure 2. Calculate the dark scale ratio and the bright scale ratio, respectively. Select a corresponding proportional array in the proportional array group 1 of 4. If the dark scale ratio is higher, Bei 1J selects the stronger proportional array in the dark scale comparison table 4 1 of the dark scale comparison table 4 1 as shown by reference number 4 5 It is shown that the corresponding method of the dark scale ratio and the dark scale ratio table in Table 41 is to substitute the dark scale ratio into a dark scale conversion function to obtain a

第13頁 1236656 五、發明說明（6) 暗L U T強度，即暗其中暗階轉換函數係一，u T強度=f丄（暗階比例）， L U T強度越大，將此=2函數，即暗階比例越高，暗階 4 4内較強之比例陣列，9階L U 丁強度對應至比例陣列組 6取代輸入灰階值；同^並以該比例陣列之調整灰階值4 照表4 2之比例陣列組4 依據亮階比例之大小從亮階對若亮階比例越高，於亮卩比4 中選擇一對應之比例陣列，中選擇越強之比例陣^ ^對照表4 2之比例陣列組4 4，亮階對照表4 2的比例陣=標號4 5 ,所示，亮階比例與一亮階轉換函數得到一意比之對應方法係將亮階比例代入度=F 2 (亮階比例），"y皆丁強度，即亮階L U 丁強即亮階比例越高，亮階70階轉換函數係一遞增函數，強度對應至比例陣列=4 丁強度越大，將此亮階L U 丁比例陣列之調整灰階值4 内較強之比例陣列，並以該調整後之灰階值輸出以調敕J代輸入灰階值，最後，將若有-影像晝面之暗；= 自度改善影像品質。比例陣列4 7及亮階對照表4 1應到暗階對照表4 1之整灰階值間之灰階值可由内插=比例陣列4 7 ,，各調與輸出示意圖為第5圖所示，^异求得，則灰階值之輸入區輸入輸出曲線分別如標號5 1、中調整後之暗階區及亮階出曲線5 1將會高於斜率丄之直纟、5 2 ，暗階區之輸入輸輸入灰階值等於輸出灰階值，友2 5 3 ，該直線5 3表示將會低於斜率1之直線5 3 ， U ^區之輸入輸出曲線5 2 5 4、5 5將以直線5 6相連技曲線5 1 、5 2 ·之臨界點 ’曲線5 1 、5 2及直線Page 13 1236656 V. Description of the invention (6) Dark LUT intensity, that is, the dark level conversion function is one, u T intensity = f 丄 (dark level ratio), the greater the LUT intensity, this = 2 function, that is, dark The higher the scale ratio is, the stronger the scale array in the dark scale 44 is. The intensity of the 9th-order LU corresponds to the scale array group 6 instead of inputting the gray scale value; the same gray scale value is adjusted by the scale array 4 according to Table 4 2 The proportion array group 4 is based on the size of the brightness ratio. From the brightness ratio to the higher brightness ratio, select a corresponding ratio array in the brightness ratio ratio 4, and select the stronger ratio matrix in ^^ See Table 4 for the ratio of 2 The array group 4 4 and the brightness level comparison table 4 2 scale matrix = label 4 5. As shown in the figure, the brightness level ratio and a brightness level conversion function to obtain a corresponding ratio method is to substitute the brightness level ratio = F 2 (brightness level Ratio), "y are all intensities, that is, bright order LU, Ding Qiang, that is, the higher the ratio of the bright order, the 70-order conversion function of the bright order is an increasing function, and the intensity corresponds to the proportional array = 4 The adjusted gray scale value of LU Ding Proportional Array is stronger than 4 and is output with the adjusted gray scale value. In Chile tone generation input grayscale value J, finally, if the - surface of the dark image day; = whiteness improving image quality. The gray scale value between the scale array 4 7 and the light level comparison table 41 1 to the dark level comparison table 41 1 can be interpolated = the scale array 4 7. The schematic diagram of each tone and output is shown in Figure 5. If ^ is obtained differently, the input and output curves of the input area of the grayscale value are as follows: 5 1. The dark adjusted area after the adjustment and the bright output curve 5 1 will be higher than the slope of the slope 丄, 5 2, and dark. The input gray scale value of the input area is equal to the gray scale value of the output, Friend 2 5 3. The straight line 5 3 indicates that it will be lower than the straight line 5 3 of the slope 1. The input and output curves of the U ^ area are 5 2 5 4, 5 5 The critical point 'curve 5', 5 2 and the straight line will be connected to the technical curve 5 1, 5 2 by a straight line 5 6

第14頁 1236656 五、發明說明（7) 5 6構成新的影像訊號調整之輸入與輸出關係，由此可知，若暗階對照表設有P組暗階比例陣列，亮階對照表設有Q組亮階比例陣列，經排列組合後可得到P X Q組比例陣列之組合方式，即會有P X Q條調整用之輸入輸出曲線，因此選擇眾多且應用彈性。另外，對照表之階數可依顯示器解析度之要求而設定，若輸入灰階值為1 0 b i t ，比例陣列中設定為1 2 b i t顯示值，則輸出灰階值即為1 2 b i t ，因此僅需改變對照表之階數即可應用於不同顯示器，極具產業利用性。Page 14 1236656 V. Description of the invention (7) 5 6 constitutes a new image signal adjustment input and output relationship. It can be seen that if the dark level comparison table is provided with P group dark level ratio arrays, and the light level comparison table is provided with Q Group bright-level proportional array. After the combination and arrangement, the combination method of PXQ group proportional array can be obtained, that is, there will be input and output curves for PXQ adjustment, so there are many choices and application flexibility. In addition, the level of the lookup table can be set according to the requirements of the resolution of the display. If the input gray level value is 10 bit and the scale array is set to 12 bit display value, the output gray level value is 1 2 bit, so Only the order of the lookup table needs to be changed to apply to different displays, which is extremely industrially applicable.

請參閱第6圖，本發明中用以執行上述方法之裝置包含：一色階分布分析單元6 1 ，用以接收影像訊號，並對每一輸入灰階值之分布數計數以獲得色階分布狀態；一對照表儲存單元6 2 ，用以儲存對照表；以及一色階運算單元6 3 ，用以計算色階比例，並代入轉換函數轉換成L U T強度以對應至對照表内之比例陣列，以此比例陣列内之調整灰階值取代輸入灰階值並輸出之；藉以調整輸入訊號源的強度，以獲得較佳之影像品質Please refer to FIG. 6. The device for performing the above method in the present invention includes: a color level distribution analysis unit 6 1 for receiving image signals and counting the number of distributions of each input gray level value to obtain a color level distribution state ; A lookup table storage unit 6 2 for storing the lookup table; and a color scale operation unit 6 3 for calculating the color scale ratio, and substituting the conversion function into the LUT intensity to correspond to the ratio array in the lookup table, so as to Adjust the grayscale value in the scale array instead of the input grayscale value and output it; to adjust the intensity of the input signal source to obtain better image quality

〇因此，本發明具有以下之優點： 1 、改善傳統液晶顯示器亮度及對比不足之缺點，影像加強後更顯得對比分明及色彩豐富。 2 、本發明之方法應用不受限於單一面板特性，不同面板經量測得到之伽瑪曲線特性即可製成特製之對照表，〇 Therefore, the present invention has the following advantages: 1. Improves the disadvantages of the brightness and contrast of the traditional liquid crystal display. After the image is strengthened, it becomes more contrasty and colorful. 2. The application of the method of the present invention is not limited to the characteristics of a single panel. The gamma curve characteristics of different panels can be measured to make a special comparison table.

第15頁 1236656 五、發明說明（8) 根據此對照表調整之影像更能表現色彩之層次。 3、利用對照表之特性，無論對應或内插灰階值，運算簡 _· 單快速，修正影像訊號之時間大為縮短，使得影像呈現更迅速修正到目標亮度。 * 4、對照表内之比例陣列數可依需求設定數量，若組數越多，可選擇調整之調整灰階值即越多，因此選擇多樣且應用彈性。 5、對照表之階數可依顯示器解析度之要求而設定，可適用各種不同灰階值階數之顯示器，應用廣泛。綜上所述，本發明確實可達到預期之目的，提供一種 · 新穎之液晶顯示器亮度補償方法及其裝置，極具產業利用之價值，爰依法提出專利申請。Page 15 1236656 V. Description of the invention (8) The image adjusted according to this comparison table can better express the color level. 3. Utilizing the characteristics of the comparison table, the calculation is simple and fast, regardless of the corresponding or interpolated grayscale values. The time for correcting the image signal is greatly shortened, which makes the image appear to be corrected to the target brightness more quickly. * 4. The number of proportional arrays in the comparison table can be set according to requirements. If the number of groups is larger, the more gray scale values can be adjusted. Therefore, the choice is diverse and the application flexibility. 5. The order of the comparison table can be set according to the requirements of the resolution of the display. It can be applied to a variety of displays with different gray levels, which is widely used. In summary, the present invention can indeed achieve the intended purpose, and provide a novel brightness compensation method and device for a liquid crystal display, which is of great industrial use value, and filed a patent application in accordance with the law.

第16頁 1236656 圖式簡單說明『圖式說明』第1圖係習知技術之透過伽瑪調整方法，將伽瑪電壓值提昇以加強影像之示意圖。第2圖係影像之色階分布圖之示意圖。第3圖係本發明實施例之液晶顯示器亮度補償方法及其裝置之原始伽瑪曲線與目標伽瑪曲線之示意圖。第4圖係本發明實施例之液晶顯示器亮度補償方法及其裝置之對照表之示意圖。第5圖係本發明實施例之液晶顯示器亮度補償方法及其裝置之灰階值之輸入與輸出示意圖。第6圖係本發明實施例之液晶顯示器亮度補償方法及其裝置之影像處理流程圖。『圖式符號說明』 2 1 :暗階區 2 2 :亮階區 2 3 :暗階區内灰階數量 2 4 :亮階區内灰階數量 1 0 :原始伽瑪曲線 1 1 :目標伽瑪曲線 1 2 :初始灰階值X1 1 3 :亮度Y1 1 4 :調整灰階值X 2 4 1 :暗階對照表Page 16 1236656 Schematic description 『Schematic Explanation』 Figure 1 is a schematic diagram of the conventional technique of increasing the gamma voltage value to enhance the image. Figure 2 is a schematic diagram of a color gradation distribution image. FIG. 3 is a schematic diagram of the original gamma curve and the target gamma curve of the brightness compensation method and device of the liquid crystal display according to the embodiment of the present invention. FIG. 4 is a schematic diagram of a comparison table of the brightness compensation method and the device of the liquid crystal display according to the embodiment of the present invention. FIG. 5 is a schematic diagram of inputting and outputting grayscale values of the brightness compensation method and the device of the liquid crystal display according to the embodiment of the present invention. FIG. 6 is an image processing flowchart of the brightness compensation method and the device of the liquid crystal display according to the embodiment of the present invention. 『Explanation of Schematic Symbols』 2 1: Dark level region 2 2: Bright level region 2 3: Number of gray levels in dark level region 2 4: Number of gray levels in bright level region 1 0: Original gamma curve 1 1: Target gamma Mark curve 1 2: Initial gray level value X1 1 3: Brightness Y1 1 4: Adjust gray level value X 2 4 1: Dark level comparison table

第17頁 1236656 圖式簡單說明 4 2 :亮階對 m $ 表 4 3 、4 3 ， ·· 初始灰階值 4 4 、4 4 ·· 比例陣列組 4 5 、4 5 ，比例陣列之強弱方向 4 6 、4 6 • 調整灰階值 4 7 :暗階對昭 > η、表内之比例陣列 4 7，；亮階對日召表内之比例陣列 5 1 、5 2 • 暗階區及亮階區入出曲線 5 3 :斜率為 1 之直線 ( 入灰階值等於輸出灰階值） 5 4 、5 5 • 臨界點 5 6 直線 6 1 色階分布分析單元 6 2 對昭 'η、表儲存單元 6 3 色階運算單元Page 17 1236656 Schematic illustration 4 2: Bright level pair m $ Table 4 3, 4 3, ·· Initial gray level value 4 4, 4 4 ·· Proportion array group 4 5, 4 5, the direction of strength of the proportional array 4 6 、 4 6 • Adjust the grayscale value 4 7: Dark level pair 昭, η, scale array in the table 4 7,; Bright level scale array in the summon table 5 1, 5 2 • Dark level area and Bright step in and out curve 5 3: a straight line with a slope of 1 (the gray scale value is equal to the output gray scale value) 5 4 、 5 5 • critical point 5 6 straight line 6 1 color scale distribution analysis unit 6 2 Storage unit 6 3 Level operation unit

第18頁Page 18

Claims

1236656 六、申請專利範圍 1 、一種液晶顯示器亮度補償方法，包含： (1 )量測面板之原始伽瑪曲線； (2 )設定一目標伽瑪曲線； (3 )輸入一初始灰階值得到對應於目標伽瑪曲線之亮度，於原始伽瑪曲線上找出表現該亮度之調整灰階值 1 (4 )重複上述（2 )至（3 )步驟產生複數組初始灰階值與複數組調整灰階值，將該複數組調整灰階值歸納為一比例陣列；1236656 VI. Patent Application Range 1. A method for compensating the brightness of a liquid crystal display, including: (1) the original gamma curve of the measurement panel; (2) setting a target gamma curve; (3) entering an initial grayscale value to get the corresponding Based on the brightness of the target gamma curve, find the adjusted grayscale value representing the brightness on the original gamma curve. 1 (4) Repeat the steps (2) to (3) above to generate the complex array initial grayscale value and the complex array adjustment gray. Order value, the grayscale value of the complex array is reduced to a proportional array;

(5 )重複上述（2 )至（4 )步驟於不同目標曲線下產生複數組比例陣列以製成一對照表； (6 )計算影像之輸入灰階值的數量分布； (7 )分別計算暗階比例和亮階比例； (8 )依據暗階比例之大小從暗階對照表中選擇一對應之比例陣列，以該比例陣列内之調整灰階值取代輸入灰階值；(5) Repeat the above steps (2) to (4) to generate a complex array scale array under different target curves to make a comparison table; (6) Calculate the number distribution of the input grayscale values of the image; (7) Calculate the dark Scale ratio and light scale ratio; (8) Select a corresponding scale array from the dark scale comparison table according to the size of the dark scale ratio, and replace the input gray scale value with the adjusted gray scale value in the scale array;

(9 )依據亮階比例之大小從亮階對照表中選擇一對應之比例陣列，以該比例陣列内之調整灰階值取代輸入灰階值；以及 (1 0 )將調整後之灰階值輸出以調整訊號強度改善影像 X3 险 · 口口貝，藉以調整輸入訊號源的強度，以獲得較佳之影像品質。 2 、如申請專利範圍第1項所述之液晶顯示器亮度補償方(9) Select a corresponding scale array from the brightness comparison table according to the size of the brightness scale, and replace the input gray scale value with the adjusted gray scale value in the scale array; and (1 0) change the adjusted gray scale value The output is used to adjust the signal strength to improve the image X3. It is used to adjust the strength of the input signal source to obtain better image quality. 2. The brightness compensation method of the LCD as described in item 1 of the scope of patent application

第19頁 1236656 六、申請專利範圍法，其中暗階比例係指暗階區内灰階數量佔總灰階數量之比例，而暗階區之範圍係總灰階範圍之一比例以下之範圍；亮階比例係指亮階區内灰階數量佔總灰階數量之比例，而亮階區之範圍係總灰階範圍之一比例以上之範圍。 3、如申請專利範圍第2項所述之液晶顯示器亮度補償方法，其中暗階區之範圍係總灰階範圍之前四分之一灰階範圍；亮階區之範圍係總灰階範圍之後四分之一灰階範圍。Page 19, 1236656 6. The patent application range method, where the dark scale ratio refers to the ratio of the number of gray scales in the dark scale area to the total gray scale number, and the range of the dark scale area is a range below one ratio of the total gray scale range; Brightness ratio refers to the ratio of the number of gray scales in the light gray scale to the total number of gray scales, and the range of the light gray scale area is a range above one percentage of the total gray scale range. 3. The brightness compensation method for a liquid crystal display as described in item 2 of the scope of the patent application, wherein the range of the dark range is a quarter of the gray range before the total gray range; the range of the bright range is four after the total gray range. One-half gray scale range.

4、如申請專利範圍第1項所述之液晶顯示器亮度補償方法，其中暗階對照表係由複數個輸入灰階值與複數組比例陣列所組成之陣列，每一輸入灰階值可於比例陣列中對應到一調整灰階值；亮階對照表係由複數個輸入灰階值與複數組比例陣列所組成之陣列，每一輸入灰階值可於比例陣列中對應到一調整灰階值。4. The brightness compensation method for a liquid crystal display as described in item 1 of the scope of the patent application, wherein the dark level comparison table is an array composed of a plurality of input grayscale values and a complex array proportional array, and each input grayscale value may be proportional to The array corresponds to an adjusted grayscale value; the light level comparison table is an array composed of a plurality of input grayscale values and a complex array proportional array. Each input grayscale value can be mapped to an adjusted grayscale value in the proportional array. .

5 、如申請專利範圍第1項所述之液晶顯示器亮度補償方法，其中暗階比例與比例陣列之對應方法係將暗階比例代入一暗階轉換函數得到一暗階L U T強度，即暗階L U T強度=F i (暗階比例），將此暗階L U T 強度對應至暗階對照表内之比例陣列，以此比例陣列内之調整灰階值取代輸入灰階值；亮階比例與比例陣列之對應方法係將亮階比例代入一亮階轉換函數得到一亮階L U T強度，即亮階L U T強度=F 2 (亮階比例），將此亮階L U T強度對應至亮階對照表内之5. The brightness compensation method for a liquid crystal display as described in item 1 of the scope of the patent application, wherein the corresponding method of the dark step ratio and the proportional array is to substitute the dark step ratio into a dark step conversion function to obtain a dark step LUT intensity, that is, a dark step LUT. Intensity = F i (dark scale ratio), the intensity of this dark scale LUT is mapped to the scale array in the dark scale comparison table, and the adjusted gray scale value in the scale array is used instead of the input gray scale value; The corresponding method is to substitute the brightness level ratio into a brightness level conversion function to obtain a brightness level LUT intensity, that is, brightness level LUT intensity = F 2 (brightness ratio), and corresponding this brightness level LUT intensity to the brightness level comparison table.

第20頁 1236656 六、申請專利範圍比例陣列，以此比例陣列内之調整灰階值取代輸入灰階值。 6、如申請專利範圍第5項所述之液晶顯示器亮度補償方法，其中暗階、亮階轉換函數係一遞增函數，即暗階、亮階比例越高，暗階、亮階L U T強度越大。 7、如申請專利範圍第1項所述之液晶顯示器亮度補償方法，其中調整灰階值間之灰階值以内插運算求得。 8、一種液晶顯示器亮度補償方法，包含： (1 )計算影像之輸入灰階值之數量分布；Page 20 1236656 VI. Patent Application Proportional Array. Use this to adjust the grayscale value in the proportional array instead of inputting the grayscale value. 6. The brightness compensation method for a liquid crystal display as described in item 5 of the scope of patent application, wherein the dark-level and bright-level conversion functions are an increasing function, that is, the higher the dark-level and bright-level ratios, the greater the dark-level and bright-level LUT intensity. . 7. The brightness compensation method for a liquid crystal display as described in item 1 of the scope of patent application, wherein the grayscale values between the grayscale values are obtained by interpolation. 8. A brightness compensation method for a liquid crystal display, comprising: (1) calculating a number distribution of an input gray level value of an image;

(2 )分別計算暗階比例和亮階比例； (3 )依據暗階比例之大小從暗階對照表中選擇一對應之比例陣列，以該比例陣列内之調整灰階值取代輸入灰階值； (4 )依據亮階比例之大小從亮階對照表中選擇一對應之比例陣列，以該比例陣列内之調整灰階值取代輸入灰階值；以及 (5 )將調整後之灰階值輸出以調整訊號強度改善影像品質；(2) Calculate the dark scale ratio and the light scale ratio separately; (3) Select a corresponding scale array from the dark scale comparison table according to the size of the dark scale ratio, and replace the input gray scale value with the adjusted gray scale value in the scale array. ; (4) select a corresponding scale array from the brightness comparison table according to the size of the brightness scale, and replace the input gray scale value with the adjusted gray scale value in the scale array; and (5) change the adjusted gray scale value Output to adjust signal strength to improve image quality;

藉以調整輸入訊號源的強度，以獲得較佳之影像品質。 9 、如申請專利範圍第8項所述之液晶顯示器亮度補償方法，其中暗階比例係指暗階區内灰階數量佔總灰階數量之比例，而暗階區之範圍係總灰階範圍之一比例以下之範圍；亮階比例係指亮階區内灰階數量佔總灰階This adjusts the strength of the input signal source to obtain better image quality. 9. The brightness compensation method for a liquid crystal display as described in item 8 of the scope of the patent application, wherein the dark level ratio refers to the ratio of the number of gray levels in the dark level area to the total number of gray levels, and the range of the dark level area is the total gray level range A range below one scale; the light scale ratio refers to the number of gray scales in the light scale area to the total gray scale

第21頁 1236656 六、申請專利範圍數量之比例，而亮階區之範圍係總灰階範圍之一比例以上之範圍。 1 0、如申請專利範圍第9項所述之液晶顯示器亮度補償方法，其中暗階區之範圍係總灰階範圍之前四分之一灰階範圍；亮階區之範圍係總灰階範圍之後四分之一灰階範圍。 1 1 、如申請專利範圍第8項所述之液晶顯示器亮度補償Page 21 1236656 VI. The scope of the number of patent applications, and the range of the bright level area is more than one ratio of the total gray level range. 10. The brightness compensation method for a liquid crystal display as described in item 9 of the scope of the patent application, wherein the range of the dark range is a quarter of the gray range before the total gray range; the range of the bright range is after the total gray range. Quarter gray scale range. 1 1 、 The brightness compensation of LCD as described in item 8 of the scope of patent application

方法，其中暗階對照表係由複數個輸入灰階值與複數組比例陣列所組成之陣列，每一輸入灰階值可於比例陣列中對應到一調整灰階值；亮階對照表係由複數個輸入灰階值與複數組比例陣列所組成之陣列，每一輸入灰階值可於比例陣列中對應到一調整灰階值。Method, wherein the dark-level comparison table is an array composed of a plurality of input gray-level values and a complex array proportional array, and each input gray-level value can correspond to an adjusted gray-level value in the proportional array; the light-level comparison table is composed of An array of a plurality of input grayscale values and a complex array of proportional arrays. Each input grayscale value can correspond to an adjusted grayscale value in the proportional array.

1 2 、如申請專利範圍第8項所述之液晶顯示器亮度補償方法，其中暗階比例與比例陣列之對應方法係將暗階比例代入一暗階轉換函數得到一暗階L U T強度，即暗階L U T強度=F :(暗階比例），將此暗卩皆L U T強度對應至暗階對照表内之比例陣列，以此比例陣列内之調整灰階值取代輸入灰階值；亮階比例與比例陣列之對應方法係將亮階比例代入一亮階轉換函數得到一亮階L U 丁強度，即亮階L U T 強度=F 2 (亮階比例），將此亮階L U T強度對應至亮階對照表内之比例陣列，以此比例陣列内之調整灰階值取代輸入灰階值。12. The brightness compensation method for a liquid crystal display as described in item 8 of the scope of patent application, wherein the corresponding method of the dark step ratio and the proportional array is to substitute the dark step ratio into a dark step conversion function to obtain a dark step LUT intensity, that is, the dark step. LUT intensity = F: (dark scale ratio), this darker LUT intensity corresponds to the scale array in the dark scale comparison table, and the gray scale value in the scale array is used instead of the input gray scale value; the light scale ratio and ratio The corresponding method of the array is to substitute the light-level ratio into a light-level conversion function to obtain a light-level LU Ding intensity, that is, the light-level LUT intensity = F 2 (light-level ratio), and map this light-level LUT intensity to the light-level comparison table. Scaled array. Use the adjusted grayscale value in this scaled array to replace the input grayscale value.

第22頁 1236656 六、申請專利範圍 1 3 、如申請專利範圍第1 2項所述之液晶顯示器亮度補償方法，其中暗階、亮階轉換函數係一遞增函數，即暗階、亮階比例越高，暗階、亮階L U T強度越 1 4、如申請專利範圍第8項所述之液晶顯示器亮度補償方法，其中調整灰階值間之灰階值以内插運算求得〇 1 5、一種液晶顯示器亮度補償方法，包含： (1 )量測面板之原始伽瑪曲線；Page 22 1236656 VI. Patent application range 1 3, as described in the patent application range item 12, brightness compensation method, wherein the dark level and light level conversion function is an increasing function, that is, the dark level and the light level ratio The higher the dark level and the bright level LUT intensity, the more the brightness compensation method of the liquid crystal display according to item 8 of the scope of the patent application, wherein the gray scale values between the gray scale values are adjusted by interpolation to obtain 0. 5. A liquid crystal A display brightness compensation method includes: (1) the original gamma curve of the measurement panel;

(2 )設定一目標伽瑪曲線； (3 )輸入一初始灰階值得到對應於目標伽瑪曲線之亮度，於原始伽瑪曲線上找出表現該亮度之調整灰階值；(2) setting a target gamma curve; (3) inputting an initial grayscale value to obtain the brightness corresponding to the target gamma curve, and finding an adjusted grayscale value representing the brightness on the original gamma curve;

(4 )重複上述（2 )至（3 )步驟產生複數組初始灰階值與複數組調整灰階值，將該複數組調整灰階值歸納為一比例陣列；以及 (5 )重複上述（2 )至（4 )步驟於不同目標曲線下產生複數組比例陣列以製成一對照表；藉以調整輸入訊號源的強度，以獲得較佳之影像品質。 1 6 、一種液晶顯示器亮度補償裝置，包含：一色階分布分析單元，用以接收影像訊號，並對每一輸入灰階值之分布數計數以獲得色階分布狀態(4) repeating the steps (2) to (3) above to generate the initial grayscale value of the complex array and adjust the grayscale value of the complex array, and summarize the adjusted grayscale value of the complex array into a proportional array; and (5) repeat the above (2) Steps) to (4) generate complex array proportional arrays under different target curves to make a comparison table; thereby adjusting the intensity of the input signal source to obtain better image quality. 16. A brightness compensation device for a liquid crystal display, comprising: a color scale distribution analysis unit for receiving image signals and counting the number of distributions of each input gray scale value to obtain a color scale distribution state

第23頁 1236656 六、申請專利範圍一對照表儲存單元，用以儲存對照表；以及一色階運算單元，用以計算色階比例，並代入轉換函數轉換成L U T強度以對應至對照表内之比例陣列，以此比例陣列内之調整灰階值取代輸入灰階值並輸出之；藉以調整輸入訊號源的強度，以獲得較佳之影像品質。 1 7、如申請專利範圍第1 6項所述之液晶顯示器亮度補償裝置，其中轉換函數係一遞增函數，即暗階、亮階比例越高，L U T強度越大。 1 8、如申請專利範圍第1 6項所述之液晶顯示器亮度補償裝置，其中調整灰階值間之灰階值以内插運算求得0Page 23 1236656 VI. Patent application scope A comparison table storage unit to store the comparison table; and a color scale operation unit to calculate the color scale ratio, which is substituted into the conversion function and converted to the LUT intensity to correspond to the ratio in the comparison table. Array, which replaces the input grayscale value with the adjusted grayscale value in this proportional array and outputs it; thereby adjusting the intensity of the input signal source to obtain better image quality. 17. The brightness compensation device for a liquid crystal display as described in item 16 of the scope of the patent application, wherein the conversion function is an increasing function, that is, the higher the ratio of the dark level and the bright level, the greater the intensity of LU T. 18. The brightness compensation device for a liquid crystal display according to item 16 of the scope of patent application, wherein the grayscale values between the grayscale values are adjusted to obtain 0 by interpolation.

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