CN100514425C - Control panel and control method for active organic light emitting diode display panel - Google Patents

Control panel and control method for active organic light emitting diode display panel Download PDF

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CN100514425C
CN100514425C CNB2006101374835A CN200610137483A CN100514425C CN 100514425 C CN100514425 C CN 100514425C CN B2006101374835 A CNB2006101374835 A CN B2006101374835A CN 200610137483 A CN200610137483 A CN 200610137483A CN 100514425 C CN100514425 C CN 100514425C
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light emitting
emitting diode
organic light
display panel
voltage
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CNB2006101374835A
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CN1945680A (en
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张孟祥
陈纪文
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友达光电股份有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y02B20/34Inorganic LEDs
    • Y02B20/341Specially adapted circuits
    • Y02B20/348Resonant bridges
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/40Control techniques providing energy savings
    • Y02B20/42Control techniques providing energy savings based on timing means or schedule

Abstract

本发明提供一种主动有机发光二极管显示面板的控制电路及控制方法,该主动有机发光二极管显示面板的控制电路,包括存储单元以及电压控制单元。 The present invention provides an active organic light emitting diode display control circuit and a control method for a panel, the active control circuit of the organic light emitting diode display panel, and a voltage control unit includes a storage unit. 其中,存储单元是用来计数并存储主动有机发光二极管显示面板的点亮时间,而电压控制单元则是依据主动有机发光二极管显示面板的点亮时间来调整共同电压的大小。 Wherein the storage unit is used for counting and storing the active lighting time of the organic light emitting diode display panel, and a voltage control unit is a lighting time of the panel to adjust the size of the common voltage based on the active organic light emitting diode. 本发明的共同电压会随着主动有机发光二极管显示面板的点亮时间增加而调降。 Common voltage with the present invention will increase the active organic light emitting diode display lighting time of the panel and cut. 藉此,补偿主动有机发光二极管显示面板内的有机发光二极管,因其随使用时间增加而上升的跨压。 Accordingly, the active compensation the organic light emitting diode display panel in the organic light emitting diode, used for its rise with increasing voltage across the time. 使得有机发光二极管的驱动电流能更稳定,且提供一画质稳定的主动有机发光二极管显示面板。 The organic light emitting diode so that the driving current can be more stable and provide a stable quality of the active organic light emitting diode display panel.

Description

主动有机发光二极管显示面板的控制电路及控制方法 The active organic light emitting diode display panel, a control circuit and control method

技术领域 FIELD

本发明是有关于一种主动有机发光二极管显示面板,且特别是有关于一种主动有机发光二极管显示面板的控制电路及控制方法。 The present invention relates to an active organic light emitting diode display panel, and more particularly to a control circuit and control method for a panel on an active organic light emitting diode display.

背景技术 Background technique

目前是一个3C的时代,也就是计算机(Computer)、通讯(Co,unicat ion)、 和消费性电子产品(Consumer electronics)的时代。 3C is a current era, which is the computer (Computer), communications (Co, unicat ion), and consumer electronics (Consumer electronics) era. 在这样的生活当中,市面上有许多琳琅满目的信息设备,例如,手机、PDA、 GPS、数字相机和显示器等。 In this life, there is a lot of information available in the market an array of devices, such as mobile phone, PDA, GPS, digital camera and the monitor. 然而,大部分的信息设备都是以平面显示器作为主要的沟通接口。 However, most of the information are based flat panel display device as the primary communication interface.

因此,在信息设备多样化的情况下,使得平面显示器种类的选择性也是相当多样化的,例如,液晶显示器、等离子体显示器和有机发光二极管显示面板等。 Thus, in the case where a variety of information equipment, a flat display such kind of selectivity is quite diverse, e.g., a liquid crystal display, a plasma display and an organic light emitting diode display panel. 其中,有机发光二极管显示面板除了具有高亮度、省电、高对比度、 快速反应时间以及低驱动电压等优点外,也符合信息设备轻薄短小的走向。 Wherein, in addition to the organic light emitting diode display panel having a high brightness, energy saving to the advantages, high contrast ratio, fast response time and a low driving voltage, etc., also meet slim and light to the device information. 因此,近年来有机发光二极管显示面板的产品不断地推陈出新。 Thus, in recent years, the organic light emitting diode display panel of the product moves forward.

依有机发光二极管的驱动方式,大致上可分为被动有机发光二极管(PM0LED) 显示面板与主动有机发光二极管(以下简称AMOLED)显示面板。 By way of the driving organic light emitting diodes, can be broadly classified into a passive organic light emitting diode (PM0LED) display panel and the active organic light emitting diode (hereinafter referred to as AMOLED) display panel. 其中,AM0LED 显示面板可用于发展大尺寸的显示面板,所以备受瞩目。 Wherein, AM0LED display panel may be used for the development of a large-sized display panel, so much attention.

AM0LED显示面板的像素单元至少包含一个晶体管和一个有机发光二极管。 AM0LED display panel comprising a pixel unit at least one transistor and an organic light emitting diode. 其中,晶体管的第一端接至工作电压,而第二端则耦接至有机发光二极管的阳极端,通过有机发光二极管的阴极端耦接至共同电压。 Wherein the first end of the transistor to the operating voltage, and the second end is coupled to the anode terminal of the organic light emitting diode, a common terminal coupled to a voltage by the female organic light emitting diode. 此外,AM0LED 显示面板使用一段时间后,AM0LED显示面板内的有机发光二极管跨压会随着发光时间增加而升高。 Further, AM0LED display panel after a period of use, AM0LED the organic light emitting diode in the panel increases with the voltage across the light emitting display time increases. 但是晶体管第一端和第二端之间的电压差加上有机发光二极管的跨压为一定值,其等于工作电压与共同电压之间的电压差。 However, the voltage difference between the first terminal of the transistor and a second end coupled across the organic light emitting diode constant voltage value, which is equal to the voltage between the operating voltage and the common voltage difference. 若有机发光二极管的跨压持续升高,则晶体管第一端和第二端之间的电压差就会 When the voltage across the organic light emitting diode continues to rise, the transistor voltage difference between the first and second ends will

4持续降低。 4 continues to decrease. 当此电压差改变时,会使得晶体管无法提供一个稳定的驱动电流来驱动有机发光二极管,而影响显示画面的画质。 When this voltage difference is changed, so that the transistor will not provide a stable driving current to drive the organic light emitting diode, affecting display quality of the screen.

发明内容 SUMMARY

因此,本发明的目的就是提供一种平面显示器与主动有机发光二极管显 Accordingly, an object of the present invention is to provide a flat panel display and the active organic light emitting diode significant

示面板的控制电路,可以依据AMOLED显示面板的点亮时间,来调整AMOLED显示面板的工作电流的大小。 The control circuit shown in panel, can be based on the lighting time AMOLED display panel, to adjust the size of the work current AMOLED display panel.

从另一观点来看,本发明的目的就是在提供一种主动有机发光二极管显示面板控制方法,可以依据AMOLED显示面板的点亮时间来调整共同电压的大小。 From another point of view, an object of the present invention is to provide an active control method of an organic light emitting diode display panel, the panel may display lighting time of the common voltage is adjusted based on the size of the AMOLED.

本发明提供一种AMOLED显示面板的控制电路,且AMOLED显示面板具有一共同电压。 The present invention provides an AMOLED display panel control circuit, and the AMOLED display panel having a common voltage. AMOLED显示面板的控制电路包括存储单元以及电压控制单元。 The control circuit of the AMOLED display panel and a voltage control unit includes a storage unit. 其中存储单元是用来计数并存储AMOLED显示面板的点亮时间,而电压控制单元则是依据AM0LED显示面板的点亮时间来调整共同电压的大小。 Wherein the storage unit is used for counting and storing the lighting time AMOLED display panel, and the control unit is based on the voltage AM0LED display panel lighting time to adjust the size of the common voltage.

本发明提供了一种平面显示器,包括AMOLED显示面板、时序控制器、电源供应器和控制电路。 The present invention provides a flat panel display, comprising a AMOLED display panel, a timing controller, power supply and control circuits. 其中,AMOLED显示面板具有多个像素单元。 Wherein, AMOLED display panel having a plurality of pixel units. 此外,时序控制器是用来驱动AMOLED显示面板,而电源供应器则是供应AMOLED显示面板的工作电压和共同电压。 Further, the timing controller is used to drive the AMOLED display panel, and the power supply is supplied AMOLED display panel of the operating voltage and the common voltage. 另外,控制电赠4禺接至时序控制器,用以检测細OLED 显示面板的点亮时间。 Further, the control circuit 4 gift Yu connected to the timing controller, for detecting fine lighting time of the OLED display panel. 本发明的控制电路是依据AM0LED显示面板的点亮时间来控制电源供应器,在固定工作电压的情况下调整共同电压的大小。 The control circuit of the present invention is the lighting time AM0LED display panel to control the power supply, resize common voltage in the case where a fixed operating voltage.

此外,本发明提供一种AMOLED显示面板的控制方法。 Further, the control panel is provided a method of the present invention AMOLED display. 首先是产生工作电压和共同电压给AMOLED显示面板,接着检测AMOLED显示面板的点亮时间。 The first is to produce the operating voltage and the common voltage to the AMOLED display panel, followed by lighting time detected AMOLED display panel. 最后依据其点亮时间,在固定工作电压的情况下而调整共同电压的大小。 Finally, according to their lighting time, and adjust the size of the common voltage in the case where a fixed operating voltage.

除此之外,本发明所提供的存储单元可以用来计数并存储AMOLED显示面板的点亮次数,依据AMOLED显示面板的点亮次数,通过电压控制单元调整共同电压的大小。 In addition, the present invention provides a storage unit may be used to count and store the number of lighting AMOLED display panel, based on the number of AMOLED display panel lit by the voltage adjusting unit controlling the magnitude of the common voltage.

由于本发明所提供的控制电路,可以检测AM0LED显示面板的点亮时间或点亮次数,并且依据点亮时间或点亮次数来控制电源供应器,在固定工作电压的情况下调整共同电压的大小。 Since the control circuit of the present invention provides can be detected AM0LED lighting time or the number of lighting display panel, and depending on the lighting time or the number of lighting to control the power supply to adjust the common voltage in the case of a fixed size of the operating voltage . 因此,本发明可以提供有机发光二极管稳 Accordingly, the present invention can provide a stable organic light emitting diode

定的驱动电流与更稳定的AMOLED显示面板画质。 Drive current given AMOLED display panel a more stable image quality. 附图说明 BRIEF DESCRIPTION

图1绘示为依照本发明的一较佳实施例的一种主动有机发光显示器的电^各方块图; FIG 1 shows as an active organic light emitting display according to an embodiment of the electric preferred embodiment of the present invention ^ FIG each block;

图2绘示为依照本发明的一较佳实施例的像素单元电路图; 图3绘示为依照本发明的一较佳实施例的一种AM0LED显示面板的控制方法流程图; FIG. 2 shows a circuit diagram of a pixel unit in accordance with a preferred embodiment of the present invention; FIG. 3 illustrates a control flow diagram of a method AM0LED panel according to a preferred embodiment of the present invention is shown;

图4绘示为依照本发明的一较佳共同电压曲线图; 4 illustrates as a preferred common voltage graph in accordance with the present invention;

图5绘示为工作电压和共同电压的电压差与AM0LED显示面板的点亮时间的曲线图。 FIG. 5 shows a graph of the lighting time of the panel voltage difference between the common voltage and the operating voltage AM0LED display.

图6绘示为依照本发明的另一较佳实施例的一种認0LED体显示面板的控制方法流程图。 FIG 6 is a schematic diagram in accordance with another preferred embodiment of the present invention is a recognized method of controlling the display panel body 0LED flowchart.

主要组件符号说明: 100: 平面显示器 REFERENCE SIGNS main components: 100: a flat panel display

102: AMOLED显示面板 102: AMOLED display panel

105: 控制电路 105: a control circuit

106: 时序控制器 106: a timing controller

108: 电源供应器 108: power supply

120: 存储单元 120: storage unit

122: 电压控制单元 122: voltage control unit

130: 扫瞄驱动电3各 130: 3 each scan driving

132: 数据驱动电路 132: data driving circuit

134: 扫描线 134: scan line

136: 数据线 136: data cable

140: 像素阵列141:像素单元 140: the pixel array 141: a pixel unit

1141:像素单元 1141: a pixel unit

210、 212:晶体管 210, 212: transistor

220:有机发光二极管 220: organic light emitting diode

410:共同电压曲线 410: common voltage curve

510:工作电压与共同电压的电压差 510: operating voltage and the voltage difference between the common voltage

512:工作电压与本发明的共同电压的电压差 512: voltage difference between the common voltage and the operating voltage of the present invention.

S301、 S303、 S305、 S308、 S601、 S603、 S605、 S608: AMOLED体显示面板的控制方法流程步骤 S301, S303, S305, S308, S601, S603, S605, S608: AMOLED display panels control method of process steps

具体实施方式 Detailed ways

为让本发明的上述和其它目的、特征和优点能更明显易懂,下文特举较佳实施例,并配合所附图式,作详细说明如下。 To make the above and other objects, features and advantages of the present invention can be more fully understood by reading the following preferred embodiments and accompanying figures, described in detail below.

图1绘示为依照本发明的一较佳实施例的一种主动有机发光显示器的电路方块图。 FIG 1 shows as an active organic light emitting display in accordance with a preferred embodiment of the present invention is a circuit block diagram of FIG. 请参照图l,本发明提供平面显示器IOO,包括AMOLED显示面板102、 控制电路105、时序控制器106和电源供应器108。 Referring to FIG. L, the IOO present invention provides a flat panel display, comprising a AMOLED display panel 102, the control circuit 105, a timing controller 106 and power supply 108. 其中,电源供应器108用来提供AM0LED显示面板102所需的电源,而控制电路l05则会依据AM0LED显示面板102的运作状况来控制电源供应器108,以调整提供给AMOLED显示面板102的电源的大小。 Wherein the power supply 108 for providing the desired display AM0LED power panel 102, the control circuit l05 will display the operating status based AM0LED panel 102 to control the power supply 108 to provide power to adjust the AMOLED display panel 102 to the size.

AM0LED显示面板102包括扫描驱动电路l30、数据驱动电路132和像素阵列"0。其中,扫描驱动电路130通过多条扫描线134耦接至像素阵列140,而数据驱动电路132则是通过多条数据线136耦接至像素阵列140。 AM0LED display panel 102 includes a scan driving circuit L30, the data driving circuit 132 and the pixel array "0. wherein the scan driving circuit 130 through a plurality of scanning lines 134 is coupled to pixel array 140, and the data driving circuit 132 by a plurality of data line 136 is coupled to pixel array 140.

在像素阵列140中,具有多个以阵列方式排列的像素141,而每一像素14 l分别配置于每一扫描线和数据线的交会处。 In the pixel array 140, having a plurality of pixels 141 arranged in an array, and each pixel 14 l are respectively arranged at each intersection of the scanning lines and the data lines. 藉此,扫描驱动电路130可以依据时序控制器106的输出,而产生一扫描信号给像素阵列140,以依序致能每一扫描线上所耦接的像素,而数据驱动电路l32则是依据时序控制器l06的输出产生一数据电压信号给像素阵列140,以分别点亮被致能的像素141。 Accordingly, the scan driving circuit 130 may be based on the output timing controller 106 generates a scan signal to the pixel array 140 to sequentially enable each of the scan line coupled to the pixel, and the data driving circuit is based on l32 l06 output timing controller generates a data voltage signal to the pixel array 140, respectively, to the lighting of the pixels 141 is enabled. -

7一般来说,电源供应器108会供应一工作电压和一共同电压给像素阵列140 中的每一像素141 (以下有详细地叙述)。 7 In general, the power supply 108 can supply an operating voltage and a common voltage to each pixel 141 in the pixel array 140 (described in detail hereinafter has). 而控制电路105可以依据每一像素141 的点亮情形来控制电源供应器108 ,以调整提供给像素141的共同电压。 And the control circuit 105 can be based on the case of the lighting of each pixel 141 controls the power supply 108 to adjust the common voltage supplied to the pixels 141.

控制电路105包含存储单元120和电压控制单元122,其中存储单元120可以用来计数并存储AMOLED显示面板102中的像素141的点亮时间。 The control circuit 105 includes a storage unit 120, and a voltage control unit 122, wherein the storage unit 120 may be used to count and store the AMOLED display panel 102 of the lighting time of the pixel 141. 藉此,电压 Thus, the voltage

以使本发明可以依据AMOLED显示面板102的点亮时间,来调整提供给像素阵列140的共同电压的大小。 So that the present invention can be based on the lighting time AMOLED display panel 102, to adjust the size of the common voltage supplied to the pixel array 140.

图2绘示为依照本发明的一较佳实施例的一种像素单元1141的电路图,可以用来实现图1的像素单元141。 A pixel circuit diagram of a unit for the embodiment FIG. 2 shows a preferred embodiment according to the present invention 1141, can be used to implement the pixel unit 141 of FIG. 1. 请参照图2,像素单元1141包括晶体管210、 212、 有机发光二极管220以及储存电容230。 Referring to FIG 2, a pixel unit 1141 includes transistors 210, 212, the organic light emitting diode 220 and a storage capacitor 230. 在本实施例中,晶体管210和212可以利用PMOS晶体管来实现。 In the present embodiment, the transistors 210 and 212 may be implemented using PMOS transistors. 其中,晶体管212控制端用来接收数据电压,第一端耦接至工作电压VDD,第二端耦接至有机发光二极管220的阳极端,并通过有机发光二极管220的阴极端耦接至AMOLED显示面板210的共同电压Vss。 Wherein the control terminal of the transistor 212 for receiving a data voltage, a first terminal coupled to the VDD operating voltage, a second terminal coupled to the anode terminal of the organic light emitting diode 220, and the female terminal coupled through the organic light emitting diode 220 is coupled to an AMOLED display the panel common voltage Vss 210. 另外,晶体管210控制端耦接至扫描线134,第一端耦接至数据线136,第二端耦接至晶体管212的控制端。 Further, the control terminal of the transistor 210 is coupled to the scan line 134, a first terminal coupled to the data line 136, a second terminal coupled to the control terminal of the transistor 212.

请合并参照图1和图2,当像素1141要被驱动时,时序控制器106产生一控制信号至扫描驱动电路130,使得扫描驱动电路130产生一扫描信号,并且通过扫描线134使晶体管210导通。 Please refer to FIGS. 1 and 2, when the pixel 1141 to be driven, the timing controller 106 generates a control signal to the scan driving circuit 130, so that the scan driving circuit 130 generates a scan signal, and the transistor 210 is turned through the scan line 134 through. 此时,时序控制器106产生一控制信号至数据驱动电路132,使数据驱动电路132产生一数据电压信号,经由数据线136传送至像素单元1141,并通过晶体管210传送至晶体管212的控制端。 In this case, the timing controller 106 generates a control signal to the data driving circuit 132, so that the data driving circuit 132 generates a data voltage signal, via the data transfer line 136 to the pixel unit 1141, and transferred through transistor 210 to the control terminal of transistor 212. 此时,晶体管212会被导通,并且产生一驱动电流ID来驱动有机发光二极管220。 In this case, transistor 212 will be turned on, and generates a drive current ID to drive the organic light emitting diode 220.

从图2中可以清楚地看到,工作电压VDD与共同电压VSS之间的电压差是固定的,此电压差会等于晶体管212第一端和第二端之间的电压差,再加上有机发光二极管220的跨压。 Can be clearly seen from Figure 2, the voltage difference between the operating voltage VDD and the common voltage VSS is fixed, this will be equal to the voltage difference between the voltage of the transistor 212 of the first and second ends difference, plus organic voltage across the light emitting diode 220. 由于有机发光二极管220的跨压会随着使用时间的累积而增加,就会造成晶体管212第一端和第二端的电压差一直缩小。 The organic light emitting diode voltage will cross with the accumulated usage time increases due to the 220, transistor 212 will cause the voltage difference between the first and second ends has been reduced. 但是MOLED显示面板102在工作的时候,晶体管212必须操作在饱和区,其条件为VDS ^Vgs-Vt。 However MOLED display panel 102 at work, transistor 212 must be operated in a saturation region, with the proviso that VDS ^ Vgs-Vt. 其中,vds是晶体管212第一端和第二端之间的电压差,而Vgs是晶体管212控制端和第一端之间的电压差,且VT是门限电压(threshold voltage)。 Wherein, VDS is the voltage between the first transistor 212 and second ends difference, Vgs is the voltage difference between the control terminal of the transistor 212 and the first end, and VT is the threshold voltage (threshold voltage). 如果Vds—直持续降低,则可能使得原本操作于饱和区的晶体管212操作于线性区(1inear region)。 If Vds- straight continues to decrease, so that it may otherwise operate in the saturation region of the transistor 212 operates in the linear region (1inear region).

因此,本发明提出一种主动有机发光二极管显示面板的控制方法。 Accordingly, the present invention proposes a method for active control of the organic light emitting diode display panel. 图3绘示为依照本发明的一较佳实施例的一种AM0LED显示面板的控制方法流程图。 AM0LED FIG. 3 shows one kind of a preferred embodiment according to the present invention, a control method of a display panel of a flowchart. 请参照图3,首先,电源供应器108如步骤S301所述,提供一工作电压vdd和一共同电压Vss给AM0LED显示面板102,用以产生一驱动电流ID,藉此驱动AMOLED 显示面板102。 Referring to FIG. 3, first, the power supply as described in step S301, 108, providing an operating voltage vdd and a common voltage Vss to AM0LED display panel 102, for generating a driving current ID, thereby driving an AMOLED display panel 102. 此外,电压控制单元122如步骤S303所述,先至存储单元120检测AMOLED显示面板102的点亮时间,接着依据检测结果通过电源供应器108来调整共同电压Vss的大小,完成步骤S305。 The voltage control unit 122 as described in step S303, the storage unit 120 Xianzhi lighting time detected AMOLED display panel 102, and then based on the detection result of the power supply 108 to adjust the size of the common voltage Vss, through the completion of step S305. 接着如步骤S308所示,存储单元120 会计数并存储AMOLED显示面板102的点亮时间,并再重复步骤S303等步骤。 Then as shown in step 120 will count storage unit and storing the lighting time AMOLED display panel 102 S308, and then repeat step S303 and other steps.

熟知此技术者应当知道,本实施例的像素电路1141的晶体管除了可以用PMOS晶体管之外,也可以用丽OS晶体管实现,其作动情形可以依据上述方法推知,于此不再赘述。 Well known in the art that should be appreciated, the pixel circuit of the transistor 1141 of the present embodiment other than the PMOS transistor can also be used to achieve Korea OS transistor which case the actuator can be inferred according to the method described above, it is omitted herein.

图4绘示为依照本发明的一较佳共同电压曲线图。 4 illustrates as a preferred common voltage graph in accordance with the present invention. 请合并参照图2和图4, 由于AMOLD显示面板102的发光时间增加时,使得有机发光二极管220的跨压也会上升。 Please refer to FIGS. 2 and 4, since the light emission time is increased AMOLD display panel 102, so that the voltage will rise across the organic light emitting diode 220. 因此,本发明提出降低共同电压Vss,来补偿有机发光二极管220随着发光时间而增加的跨压。 Accordingly, the present invention proposes to reduce the common voltage Vss, the organic light emitting diode 220 to compensate for the light emission time increases as the voltage across. 当电压控制单元122至存储单元120读取AMOLED显示面板102的点亮时间时,其可以依据共同电压曲线410与AMOLED显示面板102 点亮时间的关系,找出目前AMOLED显示面板102的已点亮时间,并对应至一共同电压Vss值。 When the voltage of the storage unit 122 to the control unit 120 reads the lighting time AMOLED display panel 102, the panel 102 which can display the relationship between the lighting time based on the common voltage curve 410 and AMOLED, to identify the current AMOLED display panel 102 is lit. time, and corresponds to a common voltage Vss values. 因此,控制电路105可以通过电源供应器108来调整共同电压Vss Thus, control circuit 105 may be adjusted 108 by a common power supply voltage Vss

的大小。 the size of. 在本发明中的工作电压VDD是固定的,因为若是调整工作电压VDD时, In the present invention, the operating voltage VDD is fixed, because if the adjustment voltage VDD,

则会影响面板参数ga麵a (r)值,导致AMOLED显示面板102的亮度受到影响。 Ga parameters will affect the panel surface a (r) values, resulting in brightness of the display panel 102 AMOLED affected. 但是,若是调整共同电压Vss,则不会产生此一问题。 However, if the adjusted common voltage Vss, it will not have this problem. 因此,本发明为固定工 Accordingly, the present invention is a fixing station

9作电压VDD,只调整共同电压VSS的大小。 9 for the voltage VDD, only resize common voltage VSS.

图5绘示为工作电压VDD和共同电压Vss的电压差与AMOLED显示面板102的发光时间的曲线图。 5 illustrates a graph of light emission time of the panel voltage difference AMOLED 102 the operating voltage VDD and the common voltage Vss display. 请参照图5,'当共同电压Vss保持一常数,则工作电压VDD 和共同电压Vss的电压差并不会因为AMOLED显示面板102的发光时间而有所改变。 Referring to FIG 5, 'when a common voltage Vss is maintained constant, the voltage difference between the voltage VDD and the common voltage Vss, and not because the working time of the light emitting AMOLED display panel 102 may change. 因此,工作电压VDD和共同电压Vss的电压差与AMOLED显示面板102的发光时间的关系是一条直线510。 Therefore, the voltage difference between the operating voltage VDD and AMOLED common voltage Vss, the display panel 102 of the light emission time relationship is a straight line 510. 此外,本发明提出AMOLED显示面板102的共同电压Vss是可以调整的。 Further, the present invention provides a common voltage Vss AMOLED display panel 102 can be adjusted. 当AMOLED显示面板102被点亮时,共同电压Vss的起始值只需调整至晶体管212工作于饱和区即可。 When the AMOLED display panel 102 is lit, the common voltage Vss just starting value was adjusted to transistor 212 to work in the saturation region. 接着依AMOLED显示面板102点亮时间的增加,根据共同电压曲线410来逐渐调降共同电压Vss。 Then the display panel 102 increases the lighting time by AMOLED, the common voltage Vss according to the common voltage curve 410 is gradually lowered. 因此,本发明的工作电压Vdd和共同电压V ss的电压差与AMOLED显示面板10 2的点亮时间的关系为一条斜线512。 Accordingly, the voltage difference with the present invention AMOLED working voltage Vdd and the common voltage V ss of the relationship between the lighting time display panel 102 is a slash 512. 除此之外,直线510、斜线512和电压轴所围成的区域,可视为本发明的AMOLED显示面板102所节省的电能。 In addition, line 510, and the voltage axis 512 are hatched region surrounded, visual present invention AMOLED display panel 102 power savings.

图6绘示为依照本发明的另一较佳实施例的一种AMOLED体显示面板的控制方法流程图。 FIG 6 is a schematic diagram in accordance with another preferred embodiment of the present invention is a method of controlling AMOLED display panel body flowchart. 请参照图6,本发明的另一可行方法为,通过存储单元120来计数并存储AMOLED显示面板102的点亮次数。 Referring to FIG 6, another possible method of the present invention is to count and store the number of lighting AMOLED display panel 102 by the storage unit 120. 首先,电源供应器108如步骤S601 所述,提供一工作电压VDD和一共同电压Vss给AMOLED显示面板102,用以产生一驱动电流ID,藉此驱动AMOLED显示面板102。 First, the power supply as described in step S601, 108, provides an operating voltage VDD and a common voltage Vss to the AMOLED display panel 102, for generating a driving current ID, thereby driving an AMOLED display panel 102. 此外,电压控制单元122如步骤S603所述,先至存储单元120检测AMOLED显示面板102的点亮次数,接着依据检测结果通过电源供应器108来调整共同电压Vss的大小,完成步骤S605。 The voltage control unit 122 as described in step S603, the storage unit 120 detects Xianzhi frequency AMOLED display panel 102 is lit, then according to the detection result of the power supply 108 to adjust the size of the common voltage Vss, through the completion of step S605.

时间,并再重复步骤S603。 Time, and repeating step S603.

综上所述,本发明提出一AMOLED显示面板的控制电路,包括存储单元以及电压控制单元。 In summary, the present invention provides a control circuit of the AMOLED display panel, and a voltage control unit includes a storage unit. 其中,存储单元用以计算并存储AMOLED显示面板的点亮时间或点亮次数,而电压控制单元则可以依据AMOLED显示面板的点亮次数或点亮时间,来调降共同电压的大小。 Wherein the storage unit is configured to calculate and store an AMOLED display panel lighting time or the number of lighting, and the voltage control unit may be an AMOLED display according to the number of lighting time or lighting panel, to cut the size of a common voltage. 因此,本发明能解决有机发光二极管因发光时间增加而升高的跨压问题,并提供一稳定的驱动电流来驱动有才几发光二 Accordingly, the present invention can solve the problem of the voltage across the organic light emitting diode due to increased light emission rise time and provide a stable driving current to drive several LEDs talented

10极管与更稳定的AMOLED显示面板画质。 Diode 10 and a more stable image quality AMOLED display panel.

虽然本发明已以较佳实施例揭露如上,然其并非用以限定本发明,任何熟习此技艺者,在不脱离本发明的精神和范围内,当可作些许的更动与润饰, 因此本发明的保护范围当以权利要求范围所界定者为准。 Although the invention has been described by reference to preferred embodiments, they are not intended to limit the present invention, any person skilled in this art, without departing from the spirit and scope of the present invention, may make various modifications and variations, so this when the scope of the invention is subject to the scope defined by the claims.

Claims (9)

1. 一种主动有机发光二极管显示面板的控制电路,其特征在于,所述主动有机发光二极管显示面板具有一共同电压和一工作电压,而所述控制电路包括:一存储单元,用以计数并存储所述主动有机发光二极管显示面板的一点亮时间或一点亮次数;以及一电压控制单元,耦接所述存储单元,在固定所述工作电压的情况下根据点亮时间或点亮次数的增加而调降所述共同电压的大小。 An active control circuit of the organic light emitting diode display panel, wherein the active organic light emitting diode display panel having a common voltage and a working voltage, said control circuit comprising: a storage unit, for counting and storing the active organic light emitting diode display panel or a light-up time that the number of light; and a voltage control means, coupled to the storage unit, in a case where the operating voltage is fixed in accordance with the lighting time or the number of lighting increases the size of the common voltage is lowered.
2. —种平面显示器,其特征在于,包括: 一主动有机发光二极管显示面板,具有多个像素单元; 一时序控制器,用以驱动所述主动有机发光二极管显示面板; 一电源供应器,用以供应所述主动有机发光二极管显示面板一工作电压和一共同电压;以及一控制电路,耦接所述时序控制器,以检测所述主动有机发光二极管显示面板的一点亮时间或一点亮次数,并依据所述点亮时间或点亮次数的增加来控制所述电源供应器在固定所述工作电压的情况下调降所述共同电压的大小。 2. - flat panel display, characterized by comprising: an active organic light emitting diode display panel having a plurality of pixel units; a timing controller to drive the active organic light emitting diode display panel; a power supply, with to supply the active organic light emitting diode display panel and an operating voltage to a common voltage; and a control circuit, coupled to the timing controller to detect the active organic light emitting diode display panel or a light-up time that light times, according to the lighting and lighting time increases or to control the number of the power supply in the case of a fixed size of the operating voltage of the common voltage is lowered.
3. 根据权利要求2所述的平面显示器,其特征在于,还包括: 一扫描驱动电路,依据所述时序控制器而产生一扫描信号至所述主动有机发光二极管显示面板;以及一数据驱动电路,依据所述时序控制器而产生一数据电压信号至所述主动有机发光二极管显示面板,以点亮所述像素单元。 And a data driving circuit; a scan driving circuit, according to the timing controller generates a scan signal to the active organic light emitting diode display panel: 3. The flat panel display according to claim 2, characterized by further comprising , according to the timing controller generates a data voltage signal to the active organic light emitting diode display panel, the pixel unit to light.
4. 根据权利要求3所述的平面显示器,其特征在于,每一像素单元包括: 一第一晶体管,其第一端接收所述数据电压信号,其控制端则接收所述扫描信号;一第二晶体管,其第一端耦接所述工作电压,其控制端则耦接所述第一晶体管的第二端;以及一有机发光二极管元件,其阳极端耦接所述第二晶体管的第二端,其阴极端则耦接所述共同电压。 4. The flat display according to claim 3, wherein each pixel cell comprises: a first transistor having a first terminal for receiving the data voltage signal which is a control terminal receiving the scanning signal; a second second transistor having a first terminal coupled to said operating voltage, a control terminal of the first transistor is coupled to a second terminal; and an organic light emitting diode, an anode terminal of the second transistor is coupled to a second terminal, the cathode terminal is coupled to the common voltage.
5. 根据权利要求2所述的平面显示器,其特征在于,所述控制电路包括: 一存储单元,用以计算并存储所述主动有机发光二极管显示面板的所述点亮次数或所述点亮时间;以及一电压控制单元,耦接所述存储单元,以依据所述点亮次数或点亮时间的增加来控制所述电源供应器在固定所述工作电压的情况下来调降所述共同电压的大小。 The flat panel display according to claim 2, wherein said control circuit comprises: a storage unit for calculating and storing the lighting frequency and the active organic light emitting diode display panel or the lighting time; and a voltage control means, coupled to the storage unit, according to the lighting to increase the frequency or to control the lighting time of the power supply in case of a fixed cut down the operating voltage of the common voltage the size of.
6. —种主动有机发光二极管显示面板的控制方法,其特征在于,包括下列步骤:产生一工作电压和一共同电压给所述主动有机发光二极管显示面板; 斗全测所述主动有机发光二极管显示面板的一点亮时间;以及依据所述点亮时间的增加而在固定所述工作电压的情况下调降所述共同电压。 6. - kind of active organic light emitting diode display panel, a control method, characterized by comprising the steps of: generating an operating voltage and a common voltage to the active organic light emitting diode display panel; full bucket sensing the active organic light emitting diode display a light-up time of the panel; and increased according to the lighting time of the cut in the case of a fixed common voltage to the operating voltage.
7. 根据权利要求6所述的主动有机发光二极管显示面板的控制方法,其特征在于,在所述调降所述共同电压步骤之后,还包括计数并存储所述点亮时间。 The active organic light emitting diode according to claim 6, wherein the control method of a display panel, wherein, after the cut in the common voltage step, and further comprising storing the lighting time count.
8. 根据权利要求6所述的主动有机发光二极管显示面板的控制方法,其特征在于,在所述产生一工作电压和一共同电压步骤之后,还包括下列步骤:检测所述主动有机发光二极管显示面板的一点亮次数;以及依据所述点亮次数的增加而在固定所述工作电压的情况下调降所述共同电压。 The active organic light emitting diode according to claim 6, wherein the control method of a display panel, wherein, after said generating an operating voltage and a common voltage step, further comprising the steps of: detecting the active organic light emitting diode display the number of light-up panel; and increased according to the number of lighting downgraded in the case of a fixed common voltage to the operating voltage.
9. 根据权利要求8所述的主动有机发光二极管显示面板的控制方法,其特征在于,在所述调降所述共同电压步骤之后,还包括计数并存储所述点亮次数。 The active organic light emitting diode according to claim 8, said display control method for a panel, wherein said cut after the step of said common voltage, and further comprising storing the count of the number of lighting.
CNB2006101374835A 2006-10-27 2006-10-27 Control panel and control method for active organic light emitting diode display panel CN100514425C (en)

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