TWI832653B - OLED displays and information processing devices that can compensate for uneven aging - Google Patents
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Abstract
一種可補償不均勻老化現象的OLED顯示器，其具有一OLED像素電路陣列及用以驅動該OLED像素電路陣列之一驅動電路，其特徵在於：該OLED像素電路陣列具有至少二組正、負供電連接線以對應連接至少二顯示區域；以及該驅動電路提供至少二組不同的正、負供電電壓至所述至少二組正、負供電連接線。An OLED display that can compensate for uneven aging has an OLED pixel circuit array and a drive circuit for driving the OLED pixel circuit array. It is characterized in that the OLED pixel circuit array has at least two sets of positive and negative power supply connections. The lines are connected to at least two display areas correspondingly; and the driving circuit provides at least two different sets of positive and negative power supply voltages to the at least two sets of positive and negative power supply connection lines.
Description
本發明係關於OLED顯示器，尤指一種可補償顯示幕之不均勻老化現象的OLED顯示器。The present invention relates to an OLED display, and in particular, to an OLED display that can compensate for uneven aging of a display screen.
OLED(organic light emitting diode；有機發光二極體)顯示器因其像素係直接以自發光之OLED元件構成，故其老化的問題特別明顯。此外，由於在顯示過程中各個像素因畫面差異可能有不同的老化速度，OLED顯示器易因而衍生出畫面烙印的問題。OLED (organic light emitting diode; organic light emitting diode) display pixels are directly composed of self-luminous OLED elements, so the aging problem is particularly obvious. In addition, since each pixel may have different aging speeds due to screen differences during the display process, OLED displays are prone to the problem of screen burn-in.
為解決上述的問題，有些廠商會在支援的解析度外增加額外的像素點，並且每隔一固定時間後微幅移動圖片以分散每個像素點的承壓(stress)時間，此功能一般稱為環繞(Orbit)功能，其情形如圖1所示(其中圖片10在一顯示幕中環繞)。例如，假設一OLED顯示器支援的顯示解析度為1600x1200，則設置1632x1228個像素，使得OLED顯示器可在保持1600x1200顯示畫面情形下隨機或以固定軌跡移動圖片，從而分散畫面中各像素的承壓(stress)時間。然而，此方法對於工程圖形，例如白圖，卻會增加重疊區域的承壓(stress)時間，反而突現老化現象。In order to solve the above problems, some manufacturers will add extra pixels in addition to the supported resolution, and slightly move the image after a fixed period of time to disperse the stress time of each pixel. This function is generally called It is the Orbit function, and the situation is as shown in Figure 1 (where the picture 10 is surrounded on a display screen). For example, assuming that an OLED display supports a display resolution of 1600x1200, set 1632x1228 pixels so that the OLED display can move images randomly or in a fixed trajectory while maintaining a 1600x1200 display, thereby dispersing the stress on each pixel in the image. )time. However, for engineering graphics, such as white graphics, this method will increase the stress time of the overlapping areas, which will lead to aging phenomena.
因此，本領域亟需一新穎的亮度補償方案以解決OLED顯示器的不均勻老化問題。Therefore, a novel brightness compensation solution is urgently needed in this field to solve the problem of uneven aging of OLED displays.
本發明之一目的在於揭露一種可補償不均勻老化現象的OLED顯示器，其可藉由對顯示幕的中心區域和外環區域施加不同的供電電壓，以克服該些區域因老化不均所造成的亮度不均的問題。One object of the present invention is to disclose an OLED display that can compensate for uneven aging by applying different supply voltages to the central area and outer ring area of the display screen to overcome the uneven aging in these areas. The problem of uneven brightness.
本發明之另一目的在於揭露一種資訊處理裝置，其可藉由對顯示幕的中心區域和外環區域施加不同的供電電壓避免其OLED顯示器產生亮度不均的現象。Another object of the present invention is to disclose an information processing device that can avoid uneven brightness in its OLED display by applying different supply voltages to the central area and outer ring area of the display screen.
為達到前述目的，一種可補償不均勻老化現象的OLED顯示器乃被提出，其具有一OLED像素電路陣列及用以驅動該OLED像素電路陣列之一驅動電路，且其特徵在於： 該OLED像素電路陣列具有至少二組正、負供電連接線以對應連接至少二顯示區域；以及 該驅動電路提供至少二組不同的正、負供電電壓至所述至少二組正、負供電連接線。 In order to achieve the aforementioned goals, an OLED display that can compensate for the uneven aging phenomenon is proposed. It has an OLED pixel circuit array and a driving circuit for driving the OLED pixel circuit array, and is characterized by: The OLED pixel circuit array has at least two sets of positive and negative power supply connection lines to correspondingly connect at least two display areas; and The driving circuit provides at least two different sets of positive and negative power supply voltages to the at least two sets of positive and negative power supply connection lines.
在一實施例中，所述至少二顯示區域包括一中央區域及至少一外環區域。In one embodiment, the at least two display areas include a central area and at least an outer ring area.
在一實施例中，供電給該中央區域之所述正、負供電電壓之壓差高於供電給各所述外環區域之所述正、負供電電壓之壓差。In one embodiment, the voltage difference between the positive and negative supply voltages supplied to the central region is higher than the voltage difference between the positive and negative supply voltages supplied to each of the outer ring regions.
在一實施例中，所述至少二顯示區域包括一中央區域、一第一外環區域及一第二外環區，供電給該中央區域之所述正、負供電電壓之壓差高於供電給該第一外環區域之所述正、負供電電壓之壓差，且供電給該第一外環區域之所述正、負供電電壓之壓差高於供電給該第二外環區域之所述正、負供電電壓之壓差。In one embodiment, the at least two display areas include a central area, a first outer ring area and a second outer ring area, and the voltage difference between the positive and negative power supply voltages supplying the central area is higher than that of the power supply voltage. The voltage difference between the positive and negative supply voltages supplying the first outer ring area is higher than the voltage difference between the positive and negative supply voltages supplying the first outer ring area. The voltage difference between the positive and negative supply voltages.
在一實施例中，各組所述正、負供電電壓之壓差係依一對應之所述顯示區域之一亮度-電壓曲線決定。In one embodiment, the voltage difference between the positive and negative supply voltages of each group is determined according to a corresponding brightness-voltage curve of the display area.
為達到前述目的，本發明進一步提出一種資訊處理裝置，其具有一中央處理單元及一OLED顯示器，該中央處理單元係用以與該OLED顯示器通信，且該OLED顯示器具有一OLED像素電路陣列及用以驅動該OLED像素電路陣列之一驅動電路，其特徵在於： 該OLED像素電路陣列具有至少二組正、負供電連接線以對應連接至少二顯示區域；以及 該驅動電路提供至少二組不同的正、負供電電壓至所述至少二組正、負供電連接線。 In order to achieve the above object, the present invention further proposes an information processing device, which has a central processing unit and an OLED display. The central processing unit is used to communicate with the OLED display, and the OLED display has an OLED pixel circuit array and an OLED display. A driving circuit used to drive one of the OLED pixel circuit arrays is characterized by: The OLED pixel circuit array has at least two sets of positive and negative power supply connection lines to correspondingly connect at least two display areas; and The driving circuit provides at least two different sets of positive and negative power supply voltages to the at least two sets of positive and negative power supply connection lines.
在一實施例中，所述至少二顯示區域包括一中央區域及至少一外環區域。In one embodiment, the at least two display areas include a central area and at least an outer ring area.
在一實施例中，供電給該中央區域之所述正、負供電電壓之壓差高於供電給各所述外環區域之所述正、負供電電壓之壓差。In one embodiment, the voltage difference between the positive and negative supply voltages supplied to the central region is higher than the voltage difference between the positive and negative supply voltages supplied to each of the outer ring regions.
在一實施例中，所述至少二顯示區域包括一中央區域、一第一外環區域及一第二外環區，供電給該中央區域之所述正、負供電電壓之壓差高於供電給該第一外環區域之所述正、負供電電壓之壓差，且供電給該第一外環區域之所述正、負供電電壓之壓差高於供電給該第二外環區域之所述正、負供電電壓之壓差。In one embodiment, the at least two display areas include a central area, a first outer ring area and a second outer ring area, and the voltage difference between the positive and negative power supply voltages supplying the central area is higher than that of the power supply voltage. The voltage difference between the positive and negative supply voltages supplying the first outer ring area is higher than the voltage difference between the positive and negative supply voltages supplying the first outer ring area. The voltage difference between the positive and negative supply voltages.
在一實施例中，各組所述正、負供電電壓之壓差係依一對應之所述顯示區域之一亮度-電壓曲線決定。In one embodiment, the voltage difference between the positive and negative supply voltages of each group is determined according to a corresponding brightness-voltage curve of the display area.
在可能的實施例中，該資訊處理裝置可為一電視機、一攜帶型電腦、一車用電腦或一智慧型手機。In possible embodiments, the information processing device may be a television, a portable computer, a car computer or a smart phone.
本發明的原理在於：The principle of the present invention is:
(一)由於一OLED顯示器之各顯示區域在經一orbiting測試後的老化程度會有不一致的情形，故本發明先量測各顯示區域的亮度-電壓曲線；以及(1) Since the aging degree of each display area of an OLED display will be inconsistent after an orbiting test, the present invention first measures the brightness-voltage curve of each display area; and
(二)依各顯示區域的亮度-電壓曲線差異決定各顯示區域的供電電壓以補償各顯示區域的亮度差異，從而優化OLED顯示器之顯示品質。(2) Determine the power supply voltage of each display area according to the brightness-voltage curve difference of each display area to compensate for the brightness difference of each display area, thereby optimizing the display quality of the OLED display.
請參照圖2，其繪示一顯示區域在一段時間的orbiting測試前、後的對應亮度-電壓曲線11和12。差異調整供電電壓的示意圖。如圖2所示，假設該顯示區域在orbiting測試前操作於A點，則該顯示區域在老化後之操作點會由A點降至B點。此時，可調高供電電壓使操作點沿著亮度-電壓曲線12移至C點而使亮度保持不變；亦即，可藉由調高供電電壓提升亮度值而補償各顯示區域的亮度衰退，從而使OLED顯示器維持均勻且一致的顯示品質。Please refer to Figure 2, which shows the corresponding brightness-voltage curves 11 and 12 of a display area before and after a period of orbiting test. Schematic diagram of differential adjustment of supply voltage. As shown in Figure 2, assuming that the display area operates at point A before the orbiting test, the operating point of the display area after aging will drop from point A to point B. At this time, the supply voltage can be increased to move the operating point to point C along the brightness-voltage curve 12 while the brightness remains unchanged; that is, the brightness value can be increased by increasing the supply voltage to compensate for the brightness degradation in each display area. , so that the OLED display maintains uniform and consistent display quality.
請參照圖3，其繪示本發明之OLED顯示器之一實施例之方塊圖。如圖3所示，一OLED顯示器100具有一OLED像素電路陣列110及用以驅動OLED像素電路陣列110之一驅動電路120。Please refer to FIG. 3 , which illustrates a block diagram of an embodiment of the OLED display of the present invention. As shown in FIG. 3 , an OLED display 100 has an OLED pixel circuit array 110 and a driving circuit 120 for driving the OLED pixel circuit array 110 .
OLED像素電路陣列110具有至少二組正、負供電連接線以對應連接至少二顯示區域。請參照圖4，其為OLED像素電路陣列110之一顯示區111的的劃分示意圖。如圖4所示，顯示區111具有一中央區域111a、一第一外環區域111b及一第二外環區域111c，其中，與中央區域111a連接之一組正、負供電連接線係與一組正、負供電電壓(V DD, V SS1)耦接，與第一外環區域111b連接之一組正、負供電連接線係與一組正、負供電電壓(V DD, V SS2)耦接，及與第二外環區域111c連接之一組正、負供電連接線係與一組正、負供電電壓(V DD, V SS3)耦接。正、負供電電壓(V DD, V SS1)的壓差大於正、負供電電壓(V DD, V SS2)的壓差，且正、負供電電壓(V DD, V SS2)的壓差大於正、負供電電壓(V DD, V SS3)的壓差。 The OLED pixel circuit array 110 has at least two sets of positive and negative power supply connection lines for correspondingly connecting at least two display areas. Please refer to FIG. 4 , which is a schematic diagram of the division of a display area 111 of the OLED pixel circuit array 110 . As shown in Figure 4, the display area 111 has a central area 111a, a first outer ring area 111b and a second outer ring area 111c. Among them, a set of positive and negative power supply connection lines connected to the central area 111a and a A set of positive and negative power supply voltages (V DD , V SS1 ) is coupled, and a set of positive and negative power supply connection lines connected to the first outer ring area 111b is coupled with a set of positive and negative power supply voltages (V DD , V SS2 ). connection, and a set of positive and negative power supply connection lines connected to the second outer ring area 111c is coupled with a set of positive and negative power supply voltages (V DD , V SS3 ). The voltage difference between the positive and negative supply voltages (V DD , V SS1 ) is greater than the voltage difference between the positive and negative supply voltages (V DD , V SS2 ), and the voltage difference between the positive and negative supply voltages (V DD , V SS2 ) is greater than the positive , the voltage difference of the negative supply voltage (V DD , V SS3 ).
詳細而言，正、負供電電壓(V DD, V SS1)的壓差係依中央區域111a在一orbiting測試前、後所量到的兩條亮度-電壓曲線決定；正、負供電電壓(V DD, V SS2)的壓差係依第一外環區域111b在該orbiting測試前、後所量到的兩條亮度-電壓曲線決定；以及正、負供電電壓(V DD, V SS3)的壓差係依第二外環區域111c在該orbiting測試前、後所量到的兩條亮度-電壓曲線決定。 Specifically, the voltage difference between the positive and negative supply voltages (V DD , V SS1 ) is determined based on the two brightness-voltage curves measured in the central area 111a before and after an orbiting test; the positive and negative supply voltages (V The voltage difference DD , V SS2 ) is determined based on the two brightness-voltage curves measured in the first outer ring area 111b before and after the orbiting test; and the voltages of the positive and negative supply voltages (V DD , V SS3 ) The difference is determined based on the two brightness-voltage curves measured in the second outer ring area 111c before and after the orbiting test.
另外，驅動電路120會提供至少二組不同的正、負供電電壓至所述至少二組正、負供電連接線，並依顯示資料產生一組驅動信號S DRV以驅動OLED像素電路陣列110。在此實施例中，驅動電路120提供(V DD, V SS1)、(V DD, V SS2)及(V DD, V SS3)等三組正、負供電電壓以對應偏壓中央區域111a、第一外環區域111b及第二外環區域111c。 In addition, the driving circuit 120 provides at least two different sets of positive and negative power supply voltages to the at least two sets of positive and negative power supply connection lines, and generates a set of driving signals S DRV according to the display data to drive the OLED pixel circuit array 110 . In this embodiment, the driving circuit 120 provides three sets of positive and negative supply voltages (V DD , V SS1 ), (V DD , V SS2 ) and (V DD , V SS3 ) to correspond to the bias central region 111a, the third An outer ring area 111b and a second outer ring area 111c.
另外，雖然本發明在此實施例中係以正供電電壓固定、負供電電壓不同的方式做亮度補償，但本發明並不以此為限，在可能的變化實施例中，亦可以正供電電壓不同、負供電電壓固定的方式做亮度補償，或以正供電電壓不同且負供電電壓不同的方式做亮度補償。請參照圖5，其繪示本發明之OLED顯示器之另一實施例之方塊圖。如圖5所示，一OLED顯示器200具有一OLED像素電路陣列210及用以驅動OLED像素電路陣列210之一驅動電路220。In addition, although in this embodiment of the present invention, the positive supply voltage is fixed and the negative supply voltage is different for brightness compensation, the present invention is not limited to this. In possible modified embodiments, the positive supply voltage can also be used. Brightness compensation can be done with different positive supply voltages and a fixed negative supply voltage, or brightness compensation can be done with different positive supply voltages and different negative supply voltages. Please refer to FIG. 5 , which illustrates a block diagram of another embodiment of the OLED display of the present invention. As shown in FIG. 5 , an OLED display 200 has an OLED pixel circuit array 210 and a driving circuit 220 for driving the OLED pixel circuit array 210 .
OLED像素電路陣列210具有三組正、負供電連接線以對應連接三個如圖4所示之顯示區域(111a、111b、111c)，且驅動電路220提供三組不同的正、負供電電壓(V DD1, V SS)、(V DD2, V SS)及(V DD3, V SS)至所述三組正、負供電連接線。 The OLED pixel circuit array 210 has three sets of positive and negative power supply connection lines to correspondingly connect the three display areas (111a, 111b, 111c) as shown in Figure 4, and the driving circuit 220 provides three different sets of positive and negative power supply voltages ( V DD1 , V SS ), (V DD2 , V SS ) and (V DD3 , V SS ) to the three sets of positive and negative power supply connection lines.
另外，在可能的變化實施例中，本發明亦可以亮度衰減較大之顯示區域的亮度-電壓曲線為準，將亮度衰減較少之顯示區域的亮度降低，從而使顯示幕有一致的亮度表現並延緩其老化速率。In addition, in a possible alternative embodiment, the present invention can also reduce the brightness of the display area with less brightness attenuation based on the brightness-voltage curve of the display area with greater brightness attenuation, so that the display screen has consistent brightness performance. and slow down its aging rate.
依上述的說明，本發明進一步提出一種資訊處理裝置。請參照圖6，其繪示本發明之資訊處理裝置之一實施例的方塊圖。如圖6所示，一資訊處理裝置300具有一中央處理單元310及一OLED顯示器320，其中，中央處理單元310係用以與OLED顯示器320通信，且OLED顯示器320係由OLED顯示器100或200實現。According to the above description, the present invention further provides an information processing device. Please refer to FIG. 6 , which illustrates a block diagram of an embodiment of the information processing device of the present invention. As shown in FIG. 6 , an information processing device 300 has a central processing unit 310 and an OLED display 320 , wherein the central processing unit 310 is used to communicate with the OLED display 320 , and the OLED display 320 is implemented by the OLED display 100 or 200 .
藉由前述所揭露的設計，本發明乃具有以下的優點：Through the design disclosed above, the present invention has the following advantages:
一、本發明的OLED顯示器可藉由對顯示幕的中心區域和外環區域施加不同的供電電壓，以克服該些區域因老化不均所造成的亮度不均的問題。1. The OLED display of the present invention can overcome the problem of uneven brightness caused by uneven aging in these areas by applying different power supply voltages to the central area and outer ring area of the display screen.
二、本發明的資訊處理裝置可藉由對顯示幕的中心區域和外環區域施加不同的供電電壓避免其OLED顯示器產生亮度不均的現象。2. The information processing device of the present invention can avoid uneven brightness in the OLED display by applying different power supply voltages to the central area and outer ring area of the display screen.
本案所揭示者，乃較佳實施例，舉凡局部之變更或修飾而源於本案之技術思想而為熟習該項技藝之人所易於推知者，俱不脫本案之專利權範疇。What is disclosed in this case is a preferred embodiment. Any partial changes or modifications derived from the technical ideas of this case and easily inferred by those familiar with the art will not deviate from the scope of the patent rights of this case.
綜上所陳，本案無論目的、手段與功效，皆顯示其迥異於習知技術，且其首先發明合於實用，確實符合發明之專利要件，懇請 貴審查委員明察，並早日賜予專利俾嘉惠社會，是為至禱。To sum up, regardless of the purpose, means and effects of this case, it shows that it is completely different from the conventional technology, and that the invention is practical first, and indeed meets the patent requirements for inventions. I sincerely ask the review committee to take a clear look and grant the patent as soon as possible for your benefit. Society is a prayer for the Supreme Being.
10:圖片 11、12:亮度-電壓曲線 100:OLED顯示器 110:OLED像素電路陣列 111:顯示區 111a:中央區域 111b:第一外環區域 111c:第二外環區域 120:驅動電路 200:OLED顯示器 210:OLED像素電路陣列 220:驅動電路 300:資訊處理裝置 310:中央處理單元 320:OLED顯示器10:Pictures 11, 12: Brightness-voltage curve 100:OLED display 110:OLED pixel circuit array 111:Display area 111a:Central area 111b: First outer ring area 111c: Second outer ring area 120:Drive circuit 200:OLED display 210:OLED pixel circuit array 220: Drive circuit 300:Information processing device 310:Central processing unit 320:OLED display
圖1為現有OLED顯示器之環繞(Orbit)功能示意圖； 圖2繪示一顯示區域在一段時間的orbiting測試前、後的對應亮度-電壓曲線； 圖3繪示本發明之OLED顯示器之一實施例之方塊圖； 圖4為圖3之OLED顯示器之OLED像素電路陣列之一顯示區的劃分示意圖； 圖5繪示本發明之OLED顯示器之另一實施例之方塊圖；以及 圖6繪示本發明之資訊處理裝置之一實施例的方塊圖。 Figure 1 is a schematic diagram of the Orbit function of an existing OLED display; Figure 2 shows the corresponding brightness-voltage curve of a display area before and after a period of orbiting test; Figure 3 is a block diagram of an embodiment of an OLED display of the present invention; Figure 4 is a schematic diagram of the division of one display area of the OLED pixel circuit array of the OLED display of Figure 3; Figure 5 shows a block diagram of another embodiment of the OLED display of the present invention; and FIG. 6 is a block diagram of an embodiment of the information processing device of the present invention.
100:OLED顯示器 100:OLED display
110:OLED像素電路陣列 110:OLED pixel circuit array
120:驅動電路 120:Drive circuit
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| CN102549651A (en) * | 2009-08-11 | 2012-07-04 | 皇家飞利浦电子股份有限公司 | Selective Compensation for Aging-Related Non-Uniformities in Displays |
| TW201437991A (en) * | 2013-01-21 | 2014-10-01 | Apple Inc | Pixel circuits and driving schemes for active matrix organic light emitting diodes |
| WO2021147160A1 (en) * | 2020-01-23 | 2021-07-29 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN114467133A (en) * | 2020-03-11 | 2022-05-10 | 深圳云英谷科技有限公司 | Method and system for compressing and decompressing compensation data for compensating brightness unevenness of display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102549651A (en) * | 2009-08-11 | 2012-07-04 | 皇家飞利浦电子股份有限公司 | Selective Compensation for Aging-Related Non-Uniformities in Displays |
| TW201437991A (en) * | 2013-01-21 | 2014-10-01 | Apple Inc | Pixel circuits and driving schemes for active matrix organic light emitting diodes |
| WO2021147160A1 (en) * | 2020-01-23 | 2021-07-29 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN114467133A (en) * | 2020-03-11 | 2022-05-10 | 深圳云英谷科技有限公司 | Method and system for compressing and decompressing compensation data for compensating brightness unevenness of display |
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