TW201318439A - Image processing method for power saving and display device thereof - Google Patents
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本發明係相關於一種影像處理方法,尤指一種節能之影像處理方法。The invention relates to an image processing method, in particular to an energy-saving image processing method.
不同於液晶顯示裝置係結合背光模組及液晶面板等元件來顯示畫面,有機發光二極體(OLED)顯示裝置係藉由施加電壓於顯示像素上之有機發光二極體,以使有機發光二極體發出特定顏色(利如紅色、藍色、綠色)之光線,進而顯示畫面。由於液晶顯示裝置之背光模組係以相同亮度持續發光,因此液晶顯示裝置之功率消耗較為穩定。而有機發光二極體顯示裝置會隨著畫面之亮暗有不同之功率消耗,當畫面暗時功率消耗較低,當畫面亮時功率消耗較高。若有機發光二極體顯示裝置顯示之畫面大部分為較亮之畫面,則有機發光二極體顯示裝置之功率消耗會較液晶顯示裝置高出許多。Unlike a liquid crystal display device that combines a backlight module and a liquid crystal panel to display a picture, an organic light emitting diode (OLED) display device uses an organic light emitting diode on a display pixel to apply an organic light emitting diode. The polar body emits light of a specific color (such as red, blue, and green) to display the picture. Since the backlight module of the liquid crystal display device continuously emits light with the same brightness, the power consumption of the liquid crystal display device is relatively stable. The organic light-emitting diode display device has different power consumption as the brightness of the picture is dark, and the power consumption is low when the picture is dark, and the power consumption is high when the picture is bright. If the display of the organic light-emitting diode display device is mostly a brighter picture, the power consumption of the organic light-emitting diode display device is much higher than that of the liquid crystal display device.
為了降低有機發光二極體顯示裝置之功率消耗,習知有機發光二極體顯示裝置會於每兩個顯示畫面間穿插一個黑畫面(亦即將所有畫素關閉),進而減少有機發光二極體顯示裝置之功率消耗。然而上述方式會增加硬體之複雜性,且顯示一個黑畫面需將所有畫素關閉,而無法根據需求局部調整部分畫面區塊之亮度。In order to reduce the power consumption of the organic light emitting diode display device, the conventional organic light emitting diode display device inserts a black image between every two display screens (that is, all pixels are turned off), thereby reducing the organic light emitting diode. The power consumption of the display device. However, the above method increases the complexity of the hardware, and displays a black screen to turn off all the pixels, and cannot locally adjust the brightness of some of the picture blocks according to the requirements.
本發明提供一種節能之影像處理方法,包含提供一影像資訊;根據該影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值決定一第一色座標及一色容許偏差值;根據該第一色座標,該色容許偏差值及一功率消耗值決定一第二紅色灰階值、一第二綠色灰階值及一第二藍色灰階值;及根據該第二紅色灰階值、該第二綠色灰階值及該第二藍色灰階值顯示影像。The present invention provides an energy-saving image processing method, including providing an image information; determining a first color coordinate and a color according to a first red grayscale value, a first green grayscale value, and a first blue grayscale value of the image information. a tolerance value; the color tolerance value and a power consumption value determine a second red grayscale value, a second green grayscale value, and a second blue grayscale value according to the first color coordinate; The second red grayscale value, the second green grayscale value, and the second blue grayscale value display an image.
本發明另提供一種節能之顯示裝置,包含一影像處理單元,及一顯示面板。該影像處理單元係用以根據一接收之影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值決定一第一色座標及一色容許偏差值,及根據該第一色座標,該色容許偏差值及一灰階調整參數決定具較小功率消耗值之一第二紅色灰階值、一第二綠色灰階值及一第二藍色灰階值。該顯示面板係根據該第二紅色灰階值、該第二綠色灰階值及該第二藍色灰階值顯示影像。The invention further provides an energy-saving display device comprising an image processing unit and a display panel. The image processing unit is configured to determine a first color coordinate and a color tolerance value according to a first red grayscale value, a first green grayscale value, and a first blue grayscale value of the received image information, and according to the The first color coordinate, the color tolerance value and a grayscale adjustment parameter determine a second red grayscale value, a second green grayscale value, and a second blue grayscale value having a smaller power consumption value. The display panel displays an image according to the second red grayscale value, the second green grayscale value, and the second blue grayscale value.
本發明另提供一種節能之影像處理方法,包含提供影像資訊;根據該影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值決定第一色座標及色容許偏差值;根據該第一色座標,該色容許偏差值及一驅動電流值決定一第二紅色灰階值、一第二綠色灰階值及一第二藍色灰階值;及根據該第二紅色灰階值、該第二綠色灰階值及該第二藍色灰階值顯示影像。The present invention further provides an energy-saving image processing method, including providing image information; determining a first color coordinate and color tolerance according to a first red grayscale value, a first green grayscale value, and a first blue grayscale value of the image information. a deviation value; the color tolerance value and a driving current value determine a second red grayscale value, a second green grayscale value, and a second blue grayscale value according to the first color coordinate; The second red grayscale value, the second green grayscale value, and the second blue grayscale value display an image.
本發明另提供一種節能之顯示裝置,包含影像處理單元,及顯示面板。該影像處理單元係用以根據接收之影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值決定一第一色座標及一色容許偏差值,及根據該第一色座標,該色容許偏差值及一灰階調整參數決定具較小驅動電流值之一第二紅色灰階值、一第二綠色灰階值及一第二藍色灰階值。該顯示面板係根據該第二紅色灰階值、該第二綠色灰階值及該第二藍色灰階值顯示影像。The invention further provides an energy-saving display device comprising an image processing unit and a display panel. The image processing unit is configured to determine a first color coordinate and a color tolerance value according to the first red grayscale value, the first green grayscale value, and the first blue grayscale value of the received image information, and according to the first The one color coordinate, the color tolerance value and a gray level adjustment parameter determine a second red gray level value, a second green gray level value, and a second blue gray level value having a smaller driving current value. The display panel displays an image according to the second red grayscale value, the second green grayscale value, and the second blue grayscale value.
請參考第1圖,第1圖為本發明顯示裝置100之示意圖。如第1圖所示,本發明顯示裝置100包含影像處理單元110,功率判斷單元120,及顯示面板130。顯示裝置100接收到影像資訊時,影像處理單元110會根據影像資訊包含之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值決定其對應之第一色座標,第一色座標係為CIE-UV色度座標圖之色座標。影像處理單元110另外會根據影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值之灰階值大小決定色容許偏差值。而功率判斷單元120係電連接於影像處理單元110,用以根據影像資訊之色容許偏差值以及預定功率消耗值(或預定驅動電流值)產生灰階調整參數並將灰階調整參數傳到影像處理單元110。影像處理單元110再根據灰階調整參數產生第二紅色灰階值、第二綠色灰階及第二藍色灰階值,並根據第二紅色灰階第值、第二綠色灰階及第二藍色灰階值驅動顯示面板130。預定功率消耗值係為驅動畫素時所預定之最小功率消耗值。色容許偏差值係為第一色座標所顯示之顏色能容許之顏色偏差值,在色容許偏差值內之色座標所所顯示之顏色對使用者而言較不易察覺其和第一色座標所顯示之顏色之差異。舉例來說,請參考第2圖,第2圖為CIE-UV色度座標圖之示意圖,第一色座標P係對應於第一紅色灰階值、第一綠色灰階值及第一藍色灰階值之色座標,而在色容許偏差值r參數內之色座標所顯示之顏色將近似於第一色座標所顯示之顏色。Please refer to FIG. 1 , which is a schematic diagram of a display device 100 of the present invention. As shown in FIG. 1, the display device 100 of the present invention includes an image processing unit 110, a power determination unit 120, and a display panel 130. When the display device 100 receives the image information, the image processing unit 110 determines the corresponding first color coordinate according to the first red grayscale value, the first green grayscale value, and the first blue grayscale value included in the image information. The color coordinate is the color coordinate of the CIE-UV chromaticity coordinate map. The image processing unit 110 further determines a color tolerance value according to the first red grayscale value, the first green grayscale value, and the grayscale value of the first blue grayscale value of the image information. The power determining unit 120 is electrically connected to the image processing unit 110 for generating a grayscale adjustment parameter according to the color tolerance value of the image information and a predetermined power consumption value (or a predetermined driving current value) and transmitting the grayscale adjustment parameter to the image. Processing unit 110. The image processing unit 110 further generates a second red grayscale value, a second green grayscale, and a second blue grayscale value according to the grayscale adjustment parameter, and according to the second red grayscale value, the second green grayscale, and the second The blue grayscale value drives the display panel 130. The predetermined power consumption value is the minimum power consumption value predetermined when the pixel is driven. The color tolerance value is the color deviation value allowed by the color displayed by the first color coordinate, and the color displayed by the color coordinate within the color tolerance value is less noticeable to the user and the first color coordinate The difference in color displayed. For example, please refer to FIG. 2, which is a schematic diagram of a CIE-UV chromaticity coordinate map. The first color coordinate P corresponds to the first red grayscale value, the first green grayscale value, and the first blue color. The color coordinates of the grayscale values, and the color coordinates displayed in the color tolerance value r parameter will approximate the color displayed by the first color coordinate.
請參考第3圖,第3圖為紅綠藍三種顏色所對應之最大色容許偏差值之示意圖。由於人眼對綠色較為敏感,因此綠色所對應之最大色容許偏差值最小。而人眼對藍色較不敏感,因此藍色所對應之最大色容許偏差值最大。第一色座標之色容許偏差值可根據影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值之大小來決定。舉例來說,當第一紅色灰階值較第一綠色灰階值及第一藍色灰階值大時則紅色為該影像資訊的主色,因此第一色座標之色容許偏差值可為主色(紅色)所對應之最大色容許偏差值。相似地,當第一綠色灰階值較第一紅色灰階值及第一藍色灰階值大時,則第一色座標之色容許偏差值可為綠色所對應之最大色容許偏差值,以此類推。而當有兩種顏色(例如紅色及綠色)之灰階值相等且較剩下之顏色(例如藍色)之灰階值大時,則第一色座標之色容許偏差值可為該兩種顏色(例如紅色及綠色)所對應之最大色容許偏差值之平均值。而當紅綠藍三種顏色之灰階值皆相等時,則第一色座標之色容許偏差值可為綠色所對應之最大色容許偏差值。Please refer to Figure 3, which is a schematic diagram of the maximum color tolerance values for the three colors of red, green and blue. Since the human eye is more sensitive to green, the maximum color tolerance value corresponding to green is the smallest. The human eye is less sensitive to blue, so the maximum color tolerance value corresponding to blue is the largest. The color tolerance value of the first color coordinate may be determined according to the first red grayscale value, the first green grayscale value, and the first blue grayscale value of the image information. For example, when the first red grayscale value is greater than the first green grayscale value and the first blue grayscale value, red is the primary color of the image information, so the color tolerance value of the first color coordinate may be The maximum color tolerance value corresponding to the primary color (red). Similarly, when the first green grayscale value is greater than the first red grayscale value and the first blue grayscale value, the color tolerance value of the first color coordinate may be the maximum color tolerance value corresponding to the green color, And so on. When there are two colors (for example, red and green) whose gray scale values are equal and the gray scale value of the remaining color (for example, blue) is large, the color tolerance value of the first color coordinate may be the two types. The average of the maximum color tolerance values for colors (such as red and green). When the gray scale values of the three colors of red, green and blue are equal, the color tolerance value of the first color coordinate may be the maximum color tolerance value corresponding to green.
當接收到功率判斷單元120傳來之灰階調整參數後,影像處理單元110可進一步根據第一色座標,色容許偏差值及灰階調整參數決定具較小功率消耗值之第二紅色灰階值、第二綠色灰階值及第二藍色灰階值。其中第二紅色灰階值、第二綠色灰階值及第二藍色灰階值所對應之第二色座標係位於第一色座標之色容許偏差值範圍內。舉例來說,若第一紅色灰階值之灰階值為R,第一綠色灰階值為G,第一藍色灰階值為B,而第一紅色灰階值調整參數為r,第一綠色灰階值之調整參數為g,第一藍色灰階值之調整參數為b,則影像處理單元可計算出在灰階調整範圍內之複數個紅色灰階值R’、綠色灰階值G’及藍色灰階值B’所產生之功率消耗(或驅動電流值),其中紅色灰階值R’係位於R±r之範圍內,綠色灰階值G’係位於G±g之範圍內,而藍色灰階值B’係位於B±b之範圍內。紅色灰階值R’、綠色灰階值G’及藍色灰階值B’所產生之功率消耗可由以下算式表示:After receiving the grayscale adjustment parameter sent by the power determining unit 120, the image processing unit 110 may further determine a second red grayscale with a smaller power consumption value according to the first color coordinate, the color tolerance value, and the grayscale adjustment parameter. Value, second green grayscale value, and second blue grayscale value. The second color coordinate corresponding to the second red grayscale value, the second green grayscale value, and the second blue grayscale value is located within a range of color tolerance values of the first color coordinate. For example, if the grayscale value of the first red grayscale value is R, the first green grayscale value is G, the first blue grayscale value is B, and the first red grayscale value adjustment parameter is r, the first The adjustment parameter of a green grayscale value is g, and the adjustment parameter of the first blue grayscale value is b, the image processing unit can calculate a plurality of red grayscale values R' and green grayscales within the grayscale adjustment range. The power consumption (or drive current value) generated by the value G' and the blue grayscale value B', wherein the red grayscale value R' is in the range of R±r, and the green grayscale value G' is located in the G±g Within the range, the blue grayscale value B' is within the range of B±b. The power consumption generated by the red grayscale value R', the green grayscale value G', and the blue grayscale value B' can be expressed by the following formula:
W=1/α×R’+1/β×G’+1/γ×B’W=1/α×R’+1/β×G’+1/γ×B’
其中W代表紅色灰階值R’、綠色灰階值G’及藍色灰階值B’所產生之功率消耗估算值,α代表紅色有機發光二極體之發光效率,β代表綠色有機發光二極體之發光效率,而γ代表藍色有機發光二極體之發光效率。有機發光二極體之發光效率係為亮度與驅動電流之比值。Where W represents the estimated power consumption of the red grayscale value R', the green grayscale value G' and the blue grayscale value B', α represents the luminous efficiency of the red organic light emitting diode, and β represents the green organic light emitting II. The luminous efficiency of the polar body, and γ represents the luminous efficiency of the blue organic light-emitting diode. The luminous efficiency of the organic light-emitting diode is the ratio of the luminance to the driving current.
當計算出在灰階調整範圍內之複數個紅色灰階值R’、綠色灰階值G’及藍色灰階值B’所產生之功率消耗(或驅動電流值),影像處理單元可決定出具較小功率消耗值之第二紅色灰階值、第二綠色灰階值及第二藍色灰階值,並確定第二紅色灰階值、第二綠色灰階值及第二藍色灰階值所對應之第二色座標係位於第一色座標之色容許偏差值範圍內,則顯示面板可根據第二紅色灰階值、第二綠色灰階值及第二藍色灰階值顯示影像。當顯示面板係以第二紅色灰階值、第二綠色灰階值及第二藍色灰階值顯示影像時,使用者不但不易察覺顯示畫面之顏色和原本畫面之顏色是否有差異,顯示面板之功率消耗(或驅動電流值)亦可有效率地降低。When calculating the power consumption (or driving current value) generated by the plurality of red grayscale values R', the green grayscale value G', and the blue grayscale value B' within the grayscale adjustment range, the image processing unit may determine Generating a second red grayscale value, a second green grayscale value, and a second blue grayscale value of a smaller power consumption value, and determining a second red grayscale value, a second green grayscale value, and a second blue grayscale The second color coordinate corresponding to the order value is within the range of the color tolerance value of the first color coordinate, and the display panel is displayed according to the second red grayscale value, the second green grayscale value, and the second blue grayscale value. image. When the display panel displays the image with the second red grayscale value, the second green grayscale value, and the second blue grayscale value, the user is not only difficult to perceive whether the color of the display screen and the color of the original screen are different, and the display panel The power consumption (or drive current value) can also be reduced efficiently.
另外,影像處理單元亦可預先建立一查找表,將第一/第二紅色灰階值、第一/第二綠色灰階值及第一/第二藍色灰階值之對應關係儲存於查找表中,當影像處理單元接收到影像資訊時,影像處理單元可立即將相對應之第二紅色灰階值、第二綠色灰階值及第二藍色灰階值提供給顯示面板以顯示影像以加快處理的速度。In addition, the image processing unit may also pre-establish a lookup table, and store the correspondence between the first/second red grayscale value, the first/second green grayscale value, and the first/second blue grayscale value in the search. In the table, when the image processing unit receives the image information, the image processing unit can immediately provide the corresponding second red grayscale value, the second green grayscale value, and the second blue grayscale value to the display panel to display the image. To speed up the processing.
請參考第4圖,第4圖為本發明影像處理方法之流程圖400。本發明影像處理方法之流程如下列步驟:步驟410:提供影像資訊;步驟420:根據該影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值決定第一色座標;步驟430:根據該影像資訊之第一紅色灰階值、第一綠色灰階值及第一藍色灰階值之灰階值大小決定該影像資訊顯示的主色並決定該主色的色容許偏差值;步驟440:根據該第一色座標,該色容許偏差值及預定功率消耗值(或驅動電流值)決定第二紅色灰階值、第二綠色灰階值及第二藍色灰階值;及步驟450:根據該第二紅色灰階值、該第二綠色灰階值及該第二藍色灰階值顯示影像。Please refer to FIG. 4, which is a flowchart 400 of the image processing method of the present invention. The flow of the image processing method of the present invention is as follows: Step 410: providing image information; Step 420: determining first according to the first red grayscale value, the first green grayscale value, and the first blue grayscale value of the image information a color coordinate; step 430: determining a primary color of the image information display and determining the primary color according to the first red grayscale value, the first green grayscale value, and the grayscale value of the first blue grayscale value of the image information a color tolerance value; step 440: determining, according to the first color coordinate, the color tolerance value and the predetermined power consumption value (or driving current value), the second red grayscale value, the second green grayscale value, and the second blue a color grayscale value; and step 450: displaying an image according to the second red grayscale value, the second green grayscale value, and the second blue grayscale value.
上述方法可利用軟體,或軟體搭配硬體來達成,且本發明方法可根據需求局部調整畫面之灰階值,而不需以硬體方式關閉所有畫素來達成節能效果。The above method can be achieved by using software or software with hardware, and the method of the invention can locally adjust the gray scale value of the picture according to requirements without turning off all pixels in a hard manner to achieve energy saving effect.
相較於先前技術,本發明影像處理方法可於灰階值之色容許偏差值參數內以較低之功率顯示畫面,進而能在使用者不易察覺顏色差異的情況下,使有機發光二極體顯示裝置達到節能之效果。Compared with the prior art, the image processing method of the present invention can display the image at a lower power within the color tolerance value parameter of the grayscale value, thereby enabling the organic light emitting diode to be easily perceived by the user without color difference. The display device achieves the effect of saving energy.
以上所述僅為本發明之較佳實施例,凡依本發明申請專利範圍所做之均等變化與修飾,皆應屬本發明之涵蓋範圍。The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
100...顯示裝置100. . . Display device
110...影像處理單元110. . . Image processing unit
120...功率判斷單元120. . . Power judgment unit
130...顯示面板130. . . Display panel
P...第一色座標P. . . First color coordinate
r...色容許偏差值r. . . Color tolerance value
400...流程圖400. . . flow chart
410至450...步驟410 to 450. . . step
第1圖為本發明顯示裝置之示意圖。Figure 1 is a schematic view of a display device of the present invention.
第2圖為CIE-UV色度座標圖之示意圖。Figure 2 is a schematic diagram of the CIE-UV chromaticity coordinate map.
第3圖為紅綠藍三種顏色所對應之最大色容許偏差值之示意圖。Figure 3 is a schematic diagram of the maximum color tolerance values for the three colors of red, green and blue.
第4圖為本發明影像處理方法之流程圖。Figure 4 is a flow chart of the image processing method of the present invention.
400...流程圖400. . . flow chart
410至450...步驟410 to 450. . . step
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