TWI709129B

TWI709129B - Extended gamma device of display panel and display device having the same

Info

Publication number: TWI709129B
Application number: TW108146468A
Authority: TW
Inventors: 吳鴻居
Original assignee: 敦泰電子股份有限公司
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-11-01
Also published as: TW202125493A

Abstract

An extended gamma device of display panel is provided with 2^p gray scale values corresponding to 2^p gamma voltage values; and q extended gray scale values corresponding to q extended gamma voltage values, wherein q is an integer greater than or equal to 1 and less than or equal to 2^p. Each extended gamma voltage value is outside the voltage range formed by the 2^p gamma voltage values and is within a voltage range that the display panel can withstand.

Description

顯示面板的延伸伽瑪裝置及包含其之顯示裝置 Extended gamma device of display panel and display device containing the same

本發明係關於顯示面板之技術領域，尤指一種顯示面板的延伸伽瑪裝置及包含該延伸伽瑪裝置之顯示裝置。 The present invention relates to the technical field of display panels, in particular to an extended gamma device of a display panel and a display device including the extended gamma device.

一般伽瑪(Gamma)裝置是藉由R/G/B伽瑪查找表(Look Up Table)的綁點電壓設定，配合類比伽瑪電路運作產生R/G/B各階的源極(source)電壓值。其中支援8位元(bit)色深顯示的驅動晶片的伽瑪電路可產生0-255階R/G/B的源極電壓；支援10位元色深顯示的驅動晶片的伽瑪電路可產生0-1023階R/G/B的源極電壓。 Generally, Gamma devices use R/G/B gamma look-up table (Look Up Table) binding point voltage setting, and work with analog gamma circuit to generate R/G/B source voltages. value. Among them, the gamma circuit of the driver chip that supports 8-bit color depth display can generate 0-255 R/G/B source voltage; the gamma circuit of the driver chip that supports 10-bit color depth display can generate 0-1023 step R/G/B source voltage.

而對於例如為主動矩陣有機發光二極體(AMOLED)顯示面板，基於面板功耗與畫素(pixel)壽命的考量，在顯示畫面上會區分一般場景(Normal Mode)以及高亮度模式(High Brightness Mode，HBM)，以對應使用一般伽瑪設定以及HBM伽瑪設定。其中，在電源晶片所能夠承受的功耗之內，HBM伽瑪設定會盡可能將AMOLED顯示面板調到最亮，以應付在高環境光下的畫面高亮度需求。而一般伽瑪設定則並不會利用到顯示面板的最高亮度，亦即在顯示面板所可耐受的電壓範圍內，會有一小段電壓區間在一般伽瑪設定下是不會被使用的，此將造成使用一般伽瑪設定時無法達成AMOLED顯示面板最高的動態範圍。 For, for example, an active matrix organic light-emitting diode (AMOLED) display panel, based on the consideration of panel power consumption and pixel life, the display screen will distinguish between normal scenes (Normal Mode) and high brightness mode (High Brightness). Mode, HBM) to correspond to the general gamma setting and HBM gamma setting. Among them, within the power consumption that the power chip can withstand, the HBM gamma setting will adjust the AMOLED display panel as bright as possible to meet the high-brightness requirements of the picture under high ambient light. The general gamma setting does not use the maximum brightness of the display panel, that is, within the voltage range that the display panel can withstand, there will be a small voltage interval that will not be used under the general gamma setting. Will cause the use of The highest dynamic range of AMOLED display panels cannot be achieved with general gamma settings.

因此，習知顯示面板的伽瑪裝置的設計上，實仍存在有諸多缺失而有予以改善之必要。 Therefore, there are still many shortcomings in the design of the gamma device of the conventional display panel, and it is necessary to improve it.

本發明之目的主要係在提供一種顯示面板的延伸伽瑪裝置及包含該延伸伽瑪裝置之顯示裝置，藉由延伸顯示面板上顯示資料的亮度表現，進而提高顯示畫面的局部動態範圍。 The purpose of the present invention is mainly to provide an extended gamma device of a display panel and a display device including the extended gamma device, which can increase the local dynamic range of the display screen by extending the brightness performance of the displayed data on the display panel.

依據本發明之一特色，其提出一種顯示面板的延伸伽瑪裝置，支援p位元色深顯示，p為大於或等於1之整數，該顯示面板具有多數個畫素，每一畫素包含至少一特定顏色次畫素，對於每一特定顏色，該延伸伽瑪裝置包含：2^p個灰階值，分別對應2^p個伽瑪電壓值；以及q個延伸灰階值，分別對應q個延伸伽瑪電壓值，其中q為大於或等於1且小於或等於2^p的整數。每一該q個延伸伽瑪電壓值是位在該2^p個伽瑪電壓值所形成的電壓範圍外，且位在該顯示面板所可耐受的電壓範圍內。 According to one feature of the present invention, it provides an extended gamma device for a display panel that supports p-bit color depth display, where p is an integer greater than or equal to 1. The display panel has a plurality of pixels, and each pixel contains at least For a specific color sub-pixel, for each specific color, the extended gamma device includes: 2 ^p grayscale values, corresponding to 2 ^p gamma voltage values; and q extended grayscale values, respectively corresponding to q extensions Gamma voltage value, where q is an integer greater than or equal to 1 and less than or equal to 2 ^p . Each of the q extended gamma voltage values is outside the voltage range formed by the 2 ^p gamma voltage values and is within the voltage range that the display panel can withstand.

依據本發明之另一特色，其提出一種顯示裝置，包含：一顯示面板，具有多數個畫素，每一畫素包含至少一具有一特定顏色的次畫素；一顯示驅動裝置，驅動該顯示面板，以將一顯示圖框顯示於該顯示面板，其中該顯示圖框的畫素值為0至2^p-1，p為大於1之整數；以及一延伸伽瑪裝置，對於每一特定顏色，具有分別對應2^p個伽瑪電壓值的2^p個灰階值、及分別對應q個延伸伽瑪電壓值的q個延伸灰階值，其中q為大於1且小於2^p的整數，其中，依據該顯示面板的畫素的亮度表現，該顯示驅動裝置將顯示圖框的每一畫素值，由該延伸伽瑪裝置對照出一灰階值或一延伸灰階值，據以選用該對照出的灰階值或延伸灰階值所對應的伽瑪電壓值或延伸伽瑪電壓值來驅動該顯示面板。 According to another feature of the present invention, it provides a display device including: a display panel with a plurality of pixels, each pixel includes at least one sub-pixel with a specific color; a display driving device for driving the display Panel to display a display frame on the display panel, wherein the pixel value of the display frame is 0 to 2 ^p -1, and p is an integer greater than 1; and an extended gamma device, for each specific color , Having 2 ^p gray-scale values corresponding to 2 ^p gamma voltage values, and q extended gray-scale values corresponding to q extended gamma voltage values, where q is an integer greater than 1 and less than 2 ^p , where According to the brightness performance of the pixels of the display panel, the display driving device will display each pixel value of the frame, the extended gamma device compares a grayscale value or an extended grayscale value, and selects the The gamma voltage value or the extended gamma voltage value corresponding to the contrasted grayscale value or the extended grayscale value drives the display panel.

以上概述與接下來的詳細說明皆為示範性質，是為了進一步說明本發明的申請專利範圍，而有關本發明的其他目的與優點，將在後續的說明與圖式加以闡述。 The above summary and the following detailed description are exemplary in nature, and are intended to further illustrate the scope of the patent application of the present invention. Other objectives and advantages of the present invention will be described in the following description and drawings.

10:顯示面板 10: Display panel

20:顯示驅動裝置 20: Display drive device

30:延伸伽瑪裝置 30: Extended gamma device

101:畫素 101: Pixel

109:顯示區域 109: display area

40:顯示圖框 40: display frame

401:畫素值 401: pixel value

圖1為本發明之顯示裝置的示意圖。 FIG. 1 is a schematic diagram of the display device of the present invention.

圖2為本發明之延伸伽瑪裝置的示意圖。 Figure 2 is a schematic diagram of the extended gamma device of the present invention.

圖3顯示本發明的延伸伽瑪裝置的伽瑪電壓值及延伸伽瑪電壓值與顯示面板的可耐受的電壓範圍之對照。 FIG. 3 shows the comparison of the gamma voltage value of the extended gamma device of the present invention and the extended gamma voltage value and the tolerable voltage range of the display panel.

為了使本發明的目的、技術方案及優點更加清楚明白，以下結合附圖及實施例，對本發明進行進一步詳細說明。應當理解，此處所描述的具體實施例僅僅用以解釋本發明的實施方式，並不用於限定本發明。 In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the implementation of the present invention, and are not used to limit the present invention.

圖1所示為本發明之顯示裝置，其包含有一顯示面板10、一顯示驅動裝置20、及一延伸伽瑪裝置30，其中，顯示面板10在顯示面的結構上為具有多數個畫素101，每一畫素101包含至少一特定顏色的次畫素，於一實施例中，該顯示面板10的每一畫素101是包含一紅色次畫素、一綠色次畫素及一藍色次畫素，亦即，顯示面板10的畫素101所顯示的色彩是由紅色、綠色及藍色三種顏色所組合而成。而對於每一特定顏色，該延伸伽瑪裝置30具有多個灰階值與延伸灰階值、及分別對應該多個灰階值與延伸灰階值的多個伽瑪電壓值與延伸伽瑪電壓值。而基於該延伸伽瑪裝置30所提供之對應該多個灰階值與延伸灰階值的多個伽瑪電壓值與延伸伽瑪電壓值，該顯示驅動裝置20驅動該顯示面板10，以將一顯示圖框40顯示於該顯示面板10。在其它實施例中，上述畫素中的次畫素也可以是不同順序的排列組合，因此本發明不以上述次畫素的排列組合為限。 FIG. 1 shows the display device of the present invention, which includes a display panel 10, a display driving device 20, and an extended gamma device 30, wherein the display panel 10 has a plurality of pixels 101 in the structure of the display surface , Each pixel 101 includes at least one sub-pixel of a specific color. In one embodiment, each pixel 101 of the display panel 10 includes one A red sub-pixel, a green sub-pixel, and a blue sub-pixel, that is, the color displayed by the pixel 101 of the display panel 10 is a combination of three colors of red, green and blue. For each specific color, the extended gamma device 30 has multiple grayscale values and extended grayscale values, and multiple gamma voltage values and extended gamma corresponding to the multiple grayscale values and extended grayscale values, respectively Voltage value. Based on the multiple gamma voltage values and extended gamma voltage values corresponding to multiple gray scale values and extended gray scale values provided by the extended gamma device 30, the display driving device 20 drives the display panel 10 to A display frame 40 is displayed on the display panel 10. In other embodiments, the sub-pixels in the above-mentioned pixels may also be arranged and combined in a different order, so the present invention is not limited to the above-mentioned arrangement and combination of the sub-pixels.

前述本發明之顯示裝置是支援p位元色深顯示，其中p為大於1之整數，而p位元色深顯示是代表顯示圖框40的畫素值為p位元之值，亦即顯示圖框40的畫素值為0至2^p-1之值，例如，對於8位元色深顯示，顯示圖框40的畫素值為0至255，對於10位元色深顯示，顯示圖框40的畫素值為0至1023，對於12位元色深顯示，顯示圖框40的畫素值為0至4095，本發明以下之說明主要是以8位元色深顯示為例，但此僅是為方便理解，並非用於限制本發明。 The aforementioned display device of the present invention supports p-bit color depth display, where p is an integer greater than 1, and p-bit color depth display means that the pixel value of the display frame 40 is the value of p bits, that is, the display The pixel value of frame 40 ranges from 0 to 2 ^p -1. For example, for 8-bit color depth display, the pixel value of display frame 40 is 0 to 255. For 10-bit color depth display, the display image The pixel value of the frame 40 is 0 to 1023. For a 12-bit color depth display, the pixel value of the display frame 40 is 0 to 4095. The following description of the present invention is mainly based on an 8-bit color depth display as an example. This is only for the convenience of understanding, not for limiting the present invention.

圖2為本發明之延伸伽瑪裝置30的示意圖，圖中顯示本實施例顯示的色彩是由紅色、綠色及藍色三種顏色所組合，因此，對於紅色、綠色及藍色三種顏色的每一種顏色，延伸伽瑪裝置30各具有多個灰階值與延伸灰階值、及分別對應該多個灰階值與延伸灰階值的多個伽瑪電壓值與延伸伽瑪電壓值。如圖所示，對於紅色(R)，延伸伽瑪裝置30具有2^p個灰階值與q個延伸灰階值、及對應該2^p個灰階值的2^p個伽瑪電壓值與對應該q個延伸灰階值的q個延伸伽瑪電壓值，其中q為大於1且小於2^p的整數。舉例而言，對於8位元色深顯示，延伸伽瑪裝置30具有256個灰階值0,1,2,...255及對應之256個伽瑪電壓值RV0,RV1,RV2,...RV255，而q為大於1且小於256的整數，例如為64，則延伸伽瑪裝置30具有64個延伸灰階值256,257,258,...319及對應之64個延伸伽瑪電壓值RV256,RV257,RV258,...RV319。此外，對於綠色(G)及藍色(B)，延伸伽瑪裝置30所具有之灰階值與延伸灰階值、及對應的伽瑪電壓值與延伸伽瑪電壓值亦是如此，故不再贅述。 2 is a schematic diagram of the extended gamma device 30 of the present invention. The figure shows that the color displayed in this embodiment is a combination of three colors of red, green and blue. Therefore, for each of the three colors of red, green and blue For color, the extended gamma device 30 each has a plurality of gray scale values and extended gray scale values, and a plurality of gamma voltage values and extended gamma voltage values corresponding to the plurality of gray scale values and the extended gray scale values, respectively. As shown, for the red (R), the extension device 30 having gamma gray scale values of 2 ^p and the q extending gray level value, and to be 2 ^p gamma voltage value of the gray scale values of 2 ^p There should be q extended gamma voltage values of q extended grayscale values, where q is an integer greater than 1 and less than ^2p . For example, for an 8-bit color depth display, the extended gamma device 30 has 256 gray scale values 0,1,2,...255 and corresponding 256 gamma voltage values RV0,RV1,RV2,... .RV255, and q is an integer greater than 1 and less than 256, for example 64, then the extended gamma device 30 has 64 extended grayscale values 256,257,258,...319 and the corresponding 64 extended gamma voltage values RV256,RV257 ,RV258,...RV319. In addition, for green (G) and blue (B), the grayscale value and extended grayscale value of the extended gamma device 30, and the corresponding gamma voltage value and extended gamma voltage value are also the same, so they are not Repeat it again.

於前述之延伸伽瑪裝置30中，其所具有的2^p個灰階值與對應的2^p個伽瑪電壓值是標準支援p位元色深顯示的伽瑪裝置所必須提供之灰階值與伽瑪電壓值，由於伽瑪裝置的作用是在修正或補償顯示的亮度，但在一般顯示模式下，並不會使用到顯示面板10的最高亮度及對應之電壓，如圖3所示之範例，AMOLED顯示面板的可耐受的電壓範圍為6V至2.2V，而標準支援8位元色深顯示的伽瑪裝置的伽瑪電壓值V0~V255約為6V至2.8V之間，故該2.8V至2.2V的電壓區間並未被標準的伽瑪裝置所使用，而再如圖3所示，本發明的延伸伽瑪裝置30即是利用此電壓區間來提供q個延伸灰階值及對應的q個延伸伽瑪電壓值，其中每一該q個延伸伽瑪電壓值是位在該2^p個伽瑪電壓值所形成的電壓範圍外，且位在該顯示面板10所可耐受的電壓範圍內，例如，利用此電壓區間來提供64個延伸灰階值256,257,258,...319、及位在6V至2.8V的電壓範圍外且位在6V至2.2V的電壓範圍內的64個延伸伽瑪電壓值V256,V257,V258,...V319，以使經由延伸伽瑪裝置30修正的顯示的亮度可以提高。 In the aforementioned extended gamma device 30, the 2 ^p gray scale values and the corresponding 2 ^p gamma voltage values are the gray scale values that the standard gamma device that supports p-bit color depth display must provide And the gamma voltage value, because the function of the gamma device is to correct or compensate the brightness of the display, but in the general display mode, the highest brightness of the display panel 10 and the corresponding voltage are not used, as shown in Figure 3 For example, the tolerable voltage range of an AMOLED display panel is 6V to 2.2V, and the gamma voltage value V0~V255 of a standard gamma device that supports 8-bit color depth display is between 6V and 2.8V. The voltage range of 2.8V to 2.2V is not used by the standard gamma device, and as shown in FIG. 3, the extended gamma device 30 of the present invention uses this voltage range to provide q extended gray scale values and Corresponding q extended gamma voltage values, where each of the q extended gamma voltage values is outside the voltage range formed by the 2 ^p gamma voltage values and is within the tolerance of the display panel 10 For example, use this voltage range to provide 64 extended gray scale values 256,257,258,...319, and 64 that are outside the voltage range of 6V to 2.8V and within the voltage range of 6V to 2.2V The extended gamma voltage values V256, V257, V258,... V319, so that the brightness of the display corrected by the extended gamma device 30 can be increased.

再請參照圖2，於前述延伸伽瑪裝置30中，該2^p個灰階值為遞增，該q個延伸灰階值是由第2^p灰階值延伸且為遞增，且當該顯示面板10為P型金屬氧化物半導體(PMOS)的類型時，該2^p個伽瑪電壓值為遞減，該q個延伸伽瑪電壓值是由第2^p伽瑪電壓值延伸且為遞減。而當該顯示面板10為N型金屬氧化物半導體(NMOS)的類型時，該2^p個伽瑪電壓值為遞增，該q個延伸伽瑪電壓值是由第2^p伽瑪電壓值延伸且為遞增。 Please refer to FIG. 2 again, in the aforementioned extended gamma device 30, the ^2p grayscale values are increasing, the q extended grayscale values are extended from the ^2p grayscale value and are increasing, and when the display panel When 10 is a P-type metal oxide semiconductor (PMOS) type, the 2 ^p gamma voltage values are decreasing, and the q extended gamma voltage values are extended from the 2 ^p gamma voltage value and are decreasing. When the display panel 10 is of the N-type metal oxide semiconductor (NMOS) type, the 2 ^p gamma voltage values are increased, and the q extended gamma voltage values are extended from the 2 ^p gamma voltage value and For incremental.

進一步，灰階值的大小與顯示面板10的畫素101的亮度成正比，同樣地，延伸灰階值的大小與該顯示面板10的畫素101的亮度成正比，且對於PMOS類型的顯示面板10，其伽瑪電壓值的大小與顯示面板10的畫素101的亮度成反比，同樣地，其延伸伽瑪電壓值的大小與該顯示面板10的畫素101的亮度成反比。而對於NMOS類型的顯示面板10，其伽瑪電壓值的大小與顯示面板10的畫素101的亮度成正比，同樣地，其延伸伽瑪電壓值的大小與該顯示面板10的畫素101的亮度成正比。在實際的應用上，該延伸伽瑪裝置30是儲存有N個灰階值與延伸灰階值、及對應的N個伽瑪電壓值與延伸伽瑪電壓值，其中N為一整數且2<=N<=2^p+q，亦即，該延伸伽瑪裝置30是僅儲存一部份之灰階值與延伸灰階值、及對應的伽瑪電壓值與延伸伽瑪電壓值，例如，僅儲存灰階值0,8,16,...255與延伸灰階值256,264,272,...319、及對應之伽瑪電壓值與延伸伽瑪電壓值，而其餘灰階值與延伸灰階值所對應之伽瑪電壓值與延伸伽瑪電壓值則是由該儲存的灰階值與延伸灰階值、及對應的伽瑪電壓值與延伸伽瑪電壓值，以內插法計算所產生。 Further, the size of the gray scale value is proportional to the brightness of the pixel 101 of the display panel 10. Similarly, the size of the extended gray scale value is proportional to the brightness of the pixel 101 of the display panel 10, and for PMOS type display panels 10. The magnitude of the gamma voltage value is inversely proportional to the brightness of the pixel 101 of the display panel 10. Similarly, the magnitude of the extended gamma voltage value is inversely proportional to the brightness of the pixel 101 of the display panel 10. For the NMOS type display panel 10, the magnitude of the gamma voltage value is proportional to the brightness of the pixel 101 of the display panel 10. Similarly, the magnitude of the extended gamma voltage value is proportional to the magnitude of the pixel 101 of the display panel 10. The brightness is directly proportional. In practical applications, the extended gamma device 30 stores N gray scale values and extended gray scale values, and corresponding N gamma voltage values and extended gamma voltage values, where N is an integer and 2<=N<=2 ^p +q, that is, the extended gamma device 30 only stores a part of the gray scale value and extended gray scale value, and the corresponding gamma voltage value and extended gamma voltage value, for example, Only the grayscale values 0, 8, 16,...255 and extended grayscale values 256,264,272,...319, and the corresponding gamma voltage values and extended gamma voltage values are stored, and the remaining grayscale values and extended grayscale values The gamma voltage value and the extended gamma voltage value corresponding to the value are calculated by interpolation from the stored gray scale value and the extended gray scale value, and the corresponding gamma voltage value and the extended gamma voltage value.

再請參照圖1，顯示圖框40包含多數個畫素值401以代表欲顯示之圖像，當顯示裝置將由多數畫素值401構成的顯示圖框40 顯示於顯示面板10時，顯示驅動裝置20會依據顯示面板10的畫素101的內容，將顯示圖框的每一畫素值401由該延伸伽瑪裝置30對照出一灰階值或一延伸灰階值，據以選用該對照出的灰階值或延伸灰階值所對應的伽瑪電壓值或延伸伽瑪電壓值來驅動該顯示面板10。據此，本發明之顯示裝置可以利用該延伸伽瑪裝置30，配合顯示驅動裝置的亮度補償功能來提升顯示資料的亮度表現，而提高顯示畫面的局部動態範圍。 1 again, the display frame 40 includes a plurality of pixel values 401 to represent the image to be displayed, when the display device will be a display frame 40 composed of a plurality of pixel values 401 When displaying on the display panel 10, the display driving device 20 will compare each pixel value 401 of the display frame to a grayscale value or an extension by the extension gamma device 30 according to the content of the pixels 101 of the display panel 10. The gray scale value is selected to drive the display panel 10 according to the gamma voltage value or the extended gamma voltage value corresponding to the compared gray scale value or the extended gray scale value. Accordingly, the display device of the present invention can utilize the extended gamma device 30 in conjunction with the brightness compensation function of the display driving device to improve the brightness performance of the display data, and increase the local dynamic range of the display screen.

例如，在圖1中的顯示面板10可能因製程之因素，導致顯示面板的例如下方的顯示區域109的亮度表現不足，而對此亮度不足的顯示區域109，該顯示驅動裝置20將顯示圖框40對應該顯示區域109的每一畫素值401(亦即，顯示圖框40對應的下方的圖框區域409的每一畫素值401)，由該延伸伽瑪裝置30對照出一較該畫素值為大之灰階值或延伸灰階值，據以選用該對照出之灰階值或延伸灰階值所對應的伽瑪電壓值或延伸伽瑪電壓值來驅動該顯示面板10的亮度不足區域，例如，當要顯示該部分圖框區域401的一畫素值為255時，因其是顯示於顯示面板10的亮度不足的區域，為避免實際亮度表現不佳，該顯示驅動裝置20將該畫素值(255)進行亮度補償，得到一畫素值較255為大的(延伸)灰階值為319，並由該延伸伽瑪裝置30選用該(延伸)灰階值(319)所對應的(延伸)伽瑪電壓值V319來驅動顯示面板10以顯示該畫素值於該亮度不足區域，而能夠補償亮度不足，使得顯示面板的整體亮度表現優異。 For example, the display panel 10 in FIG. 1 may cause insufficient brightness of the display area 109 below the display panel due to manufacturing process factors. For the display area 109 with insufficient brightness, the display driving device 20 displays the frame 40 corresponds to each pixel value 401 of the display area 109 (that is, each pixel value 401 of the lower frame area 409 corresponding to the display frame 40), and the extended gamma device 30 compares the The pixel value is a large gray-scale value or extended gray-scale value, and the gamma voltage value or extended gamma voltage value corresponding to the compared gray-scale value or extended gray-scale value is selected to drive the display panel 10 Insufficient brightness area, for example, when a pixel value of the part of the frame area 401 to be displayed is 255, because it is an insufficient brightness area displayed on the display panel 10, in order to avoid poor actual brightness performance, the display driving device 20 performs brightness compensation on the pixel value (255) to obtain a (extended) grayscale value of 319 with a pixel value greater than 255, and the (extended) grayscale value (319) is selected by the extended gamma device 30 The (extended) gamma voltage value V319 corresponding to) drives the display panel 10 to display the pixel value in the insufficient brightness area, which can compensate for the insufficient brightness, so that the overall brightness performance of the display panel is excellent.

由以上之說明可知，以本發明之延伸伽瑪裝置，配合顯示驅動裝置的亮度補償功能，可突破習知伽瑪裝置的灰階範圍限制與最大亮度限制，延伸顯示面板上顯示資料的亮度表現，進而提高顯示畫面的局部動態範圍，因此可達成在不增加顯著功耗的情況下，仍可使用到最高的動態，且對顯示面板進行完整的亮度補償。 It can be seen from the above description that the extended gamma device of the present invention, in conjunction with the brightness compensation function of the display driving device, can break through the grayscale range and maximum brightness limits of the conventional gamma device, and extend the brightness performance of the displayed data on the display panel To improve the display screen’s The local dynamic range can achieve the highest dynamics without increasing significant power consumption, and complete brightness compensation for the display panel.

上述實施例僅係為了方便說明而舉例而已，本發明所主張之權利範圍自應以申請專利範圍所述為準，而非僅限於上述實施例。 The above-mentioned embodiments are merely examples for the convenience of description, and the scope of rights claimed in the present invention should be subject to the scope of the patent application, rather than limited to the above-mentioned embodiments.

10:顯示面板 10: Display panel

20:顯示驅動裝置 20: Display drive device

30:延伸伽瑪裝置 30: Extended gamma device

101:畫素 101: Pixel

109:顯示區域 109: display area

40:顯示圖框 40: display frame

401:畫素值 401: pixel value

409:圖框區域 409: frame area

Claims

一種顯示面板的延伸伽瑪裝置，支援p位元色深顯示，p為大於1之整數，該顯示面板具有多數個畫素，每一畫素包含至少一特定顏色次畫素，對於每一特定顏色，該延伸伽瑪裝置包含：2^p個灰階值，分別對應2^p個伽瑪電壓值；以及q個延伸灰階值，分別對應q個延伸伽瑪電壓值，其中q為大於1且小於2^p的整數，其中，每一該q個延伸伽瑪電壓值是位在該2^p個伽瑪電壓值所形成的電壓範圍外，且位在該顯示面板所可耐受的電壓範圍內。 A display panel extended gamma device that supports p-bit color depth display, p is an integer greater than 1. The display panel has a plurality of pixels, and each pixel includes at least one specific color sub-pixel. For each specific color Color, the extended gamma device includes: 2 ^p grayscale values, corresponding to 2 ^p gamma voltage values; and q extended grayscale values, respectively corresponding to q extended gamma voltage values, where q is greater than 1 and An integer less than 2 ^p , where each of the q extended gamma voltage values is outside the voltage range formed by the 2 ^p gamma voltage values and is within the voltage range that the display panel can withstand .

如申請專利範圍第1項所述之顯示面板的延伸伽瑪裝置，其中，該2^p個灰階值為遞增，該q個延伸灰階值是由第2^p灰階值延伸且為遞增。 According to the extended gamma device of the display panel described in the first item of the scope of patent application, the ^2p gray scale values are increasing, and the q extended gray scale values are extended from the ^2p gray scale value and are increasing.

如申請專利範圍第2項所述之顯示面板的延伸伽瑪裝置，其中，該2^p個伽瑪電壓值為遞減，該q個延伸伽瑪電壓值是由第2^p伽瑪電壓值延伸且為遞減。 According to the extended gamma device of the display panel described in item 2 of the scope of patent application, wherein the 2 ^p gamma voltage values are decreasing, and the q extended gamma voltage values are extended by the 2 ^p gamma voltage values and For decreasing.

如申請專利範圍第2項所述之顯示面板的延伸伽瑪裝置，其中，該2^p個伽瑪電壓值為遞增，該q個延伸伽瑪電壓值是由第2^p伽瑪電壓值延伸且為遞增。 According to the extended gamma device of the display panel described in item 2 of the scope of patent application, wherein the 2 ^p gamma voltage values are increased, and the q extended gamma voltage values are extended from the 2 ^p gamma voltage values and For incremental.

如申請專利範圍第1項所述之顯示面板的延伸伽瑪裝置，其儲存有N個灰階值與延伸灰階值、及對應的N個伽瑪電壓值與延伸伽瑪電壓值，其中N為一整數且2<=N<=2^p+q，而其餘灰階值與延伸灰階值所對應之伽瑪電壓值與延伸伽瑪電壓值是由該儲存的灰階值與延伸灰階值、及對應的伽瑪電壓值與延伸伽瑪電壓值，以內插法計算所產生。 The extended gamma device for a display panel as described in the first item of the scope of patent application, which stores N gray-scale values and extended gray-scale values, and corresponding N gamma voltage values and extended gamma voltage values, where N Is an integer and 2<=N<=2 ^p +q, and the gamma voltage values and extended gamma voltage values corresponding to the remaining grayscale values and extended grayscale values are derived from the stored grayscale values and extended grayscale values The value, and the corresponding gamma voltage value and extended gamma voltage value are calculated by interpolation.

如申請專利範圍第1項所述之顯示面板的延伸伽瑪裝置，其中，該顯示面板的每一畫素包含一紅色次畫素、一綠色次畫素及一藍色次畫素。 According to the extended gamma device of the display panel described in claim 1, wherein each pixel of the display panel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel.

一種顯示裝置，包含：一顯示面板，具有多數個畫素，每一畫素包含至少一具有一特定顏色的次畫素；一顯示驅動裝置，驅動該顯示面板，以將一顯示圖框顯示於該顯示面板，其中該顯示圖框的畫素值為0至2^p-1，p為大於1之整數；以及一延伸伽瑪裝置，對於每一特定顏色，具有分別對應2^p個伽瑪電壓值的2^p個灰階值、及分別對應q個延伸伽瑪電壓值的q個延伸灰階值，其中q為大於或等於1且小於或等於2^p的整數，每一該q個延伸伽瑪電壓值是位在該2^p個伽瑪電壓值所形成的電壓範圍外，且位在該顯示面板所可耐受的電壓範圍內，其中，依據該顯示面板的畫素的亮度表現，該顯示驅動裝置將顯示圖框的每一畫素值，由該延伸伽瑪裝置對照出一灰階值或一延伸灰階值，據以選用該對照出的灰階值或延伸灰階值所對應的伽瑪電壓值或延伸伽瑪電壓值來驅動該顯示面板。 A display device includes: a display panel with a plurality of pixels, each pixel includes at least one sub-pixel with a specific color; a display driving device, which drives the display panel to display a display frame on The display panel, wherein the pixel value of the display frame is 0 to 2 ^p -1, and p is an integer greater than 1; and an extended gamma device having 2 ^p gamma voltages for each specific color Value of 2 ^p gray scale values and q extended gray scale values corresponding to q extended gamma voltage values, where q is an integer greater than or equal to 1 and less than or equal to 2 ^p , and each of the q extended gamma The voltage value is outside the voltage range formed by the 2 ^p gamma voltage values and is within the voltage range that the display panel can withstand, wherein, according to the brightness performance of the pixels of the display panel, the The display driving device displays each pixel value of the frame, the extended gamma device compares a grayscale value or an extended grayscale value, and selects the corresponding grayscale value or extended grayscale value accordingly Gamma voltage value or extended gamma voltage value to drive the display panel.

如申請專利範圍第7項所述之顯示裝置，其中，該2^p個灰階值為遞增，該q個延伸灰階值是由第2^p灰階值延伸且為遞增，灰階值的大小與該顯示面板的畫素的亮度成正比，延伸灰階值的大小與該顯示面板的畫素的亮度成正比。 The display device described in item 7 of the scope of patent application, wherein the 2 ^p gray scale values are increasing, the q extended gray scale values are extended from the 2 ^p gray scale value and are increasing, and the magnitude of the gray scale value It is proportional to the brightness of the pixels of the display panel, and the size of the extended grayscale value is proportional to the brightness of the pixels of the display panel.

如申請專利範圍第8項所述之顯示裝置，其中，該2^p個伽瑪電壓值為遞減，該q個延伸伽瑪電壓值是由第2^p伽瑪電壓值延伸且為遞減，伽瑪電壓值的大小與顯示面板的畫素的亮度成反比，延伸伽瑪電壓值的大小與顯示面板的畫素的亮度成反比。 According to the display device described in item 8 of the scope of patent application, wherein the 2 ^p gamma voltage values are decreasing, the q extended gamma voltage values are extended from the 2 ^p gamma voltage value and are decreasing, and the gamma The magnitude of the voltage value is inversely proportional to the brightness of the pixels of the display panel, and the magnitude of the extended gamma voltage value is inversely proportional to the brightness of the pixels of the display panel.

如申請專利範圍第8項所述之顯示裝置，其中，該2^p個伽瑪電壓值為遞增，該q個延伸伽瑪電壓值是由第2^p伽瑪電壓值延伸且為遞增，伽瑪電壓值的大小與顯示面板的畫素的亮度成正比，延伸伽瑪電壓值的大小與顯示面板的畫素的亮度成正比。 The display device described in item 8 of the scope of patent application, wherein the 2 ^p gamma voltage values are increasing, and the q extended gamma voltage values are extended from the 2 ^p gamma voltage value and are increasing, and the gamma The magnitude of the voltage value is proportional to the brightness of the pixels of the display panel, and the magnitude of the extended gamma voltage value is proportional to the brightness of the pixels of the display panel.

如申請專利範圍第8項所述之顯示裝置，其中，根據該顯示面板的亮度不足區域，該顯示驅動裝置將顯示圖框對應該區域的每一畫素值，由該延伸伽瑪裝置對照出一較該畫素值為大之灰階值或延伸灰階值，據以選用該對照出之灰階值或延伸灰階值所對應的伽瑪電壓值或延伸伽瑪電壓值來驅動該顯示面板的亮度不足區域。 The display device described in item 8 of the scope of patent application, wherein, according to the insufficient brightness area of the display panel, the display driving device will display the value of each pixel in the area corresponding to the frame of the display frame, and compare it with the extended gamma device A grayscale value or extended grayscale value larger than the pixel value, and the corresponding gamma voltage value or extended gamma voltage value corresponding to the contrasted grayscale value or extended grayscale value is selected to drive the display The insufficient brightness area of the panel.

如申請專利範圍第7項所述之顯示裝置，其中，該延伸伽瑪裝置儲存有N個灰階值與延伸灰階值、及對應的N個伽瑪電壓值與延伸伽瑪電壓值，其中N為一整數且2<=N<=2^p+q，而其餘灰階值與延伸灰階值所對應之伽瑪電壓值與延伸伽瑪電壓值是由該儲存的灰階值與延伸灰階值、及對應的伽瑪電壓值與延伸伽瑪電壓值，以內插法計算所產生。 The display device according to item 7 of the scope of patent application, wherein the extended gamma device stores N grayscale values and extended grayscale values, and corresponding N gamma voltage values and extended gamma voltage values, wherein N is an integer and 2<=N<=2 ^p +q, and the gamma voltage values and extended gamma voltage values corresponding to the remaining grayscale values and extended grayscale values are determined by the stored grayscale values and extended grayscale values. The order value, and the corresponding gamma voltage value and the extended gamma voltage value are calculated by interpolation.

如申請專利範圍第7項所述之顯示裝置，其中，該顯示面板的每一畫素包含一紅色次畫素、一綠色次畫素及一藍色次畫素。 The display device described in claim 7, wherein each pixel of the display panel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel.