CN1728217A - 面板显示装置的驱动电路及面板显示装置的驱动方法 - Google Patents
面板显示装置的驱动电路及面板显示装置的驱动方法 Download PDFInfo
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Abstract
在以前的面板显示装置的驱动电路及面板显示装置的驱动方法中,存在这样的课题:充电开始时刻的发光的上升要花很多时间。本发明的面板显示装置的驱动电路是驱动分别设置在多条数据线SEGm及多条扫描线COMn的交叉点的有机EL元件PEm、n的面板显示装置的驱动电路,具备:在将有机EL元件PEm、n的负载电容充电到发光所需的电压值的上升期间,将选择的数据线SEGm和数据线电源30连接的电压控制电路12;以及上升期间后,将数据线SEGm和恒流源11连接的驱动控制电路10。
Description
技术领域
本发明与面板显示装置的驱动电路及面板显示装置的驱动方法有关,特别是和能高速进行发光元件的充电的面板显示装置的驱动电路及面板显示装置的驱动方法有关。
背景技术
通常,如图9所示,在具有分别设置在多条数据线(阳极线、SEG1~SEGm)和多条扫描线(阴极线、COM1~COMn)的交叉点的有机EL元件PEm,n的有机EL面板显示装置中,有机EL面板显示装置的驱动电路分别在每条数据线SEGm上都具有和恒流源11连接的开关电路SWs1~SWsm,而且分别在每条扫描线COMn上都具有和电源电位(Vcc)20连接的开关电路SWc1~SWcn。通过输出控制装置即驱动控制电路10来控制这些开关电路SWsm、SWcn对有机EL元件PEm、n的选择和非选择。
使有机EL面板显示装置发光显示的一般操作是如图10所示的操作波形,通过将扫描线COMn的开关电路SWcn在一定期间(定义为一帧)间隔内处于开启状态、关闭状态,按顺序选择发光的有机EL元件PEm、n所设置的扫描线COMn的行。这里,开启状态是通过将扫描线COMn与地电位Vss连接而进行的,关闭状态是通过将扫描线COMn与电源电位Vcc连接而进行的。一帧期间P0一般由将有机EL元件PEm、n充电的电荷放电的放电期间P1和开启1扫描线COMn、用于使选择的有机EL元件PEm、n发光的充电期间P2构成。
在充电期间,使与选择的有机EL元件PEm、n连接的数据线SEGm的开关电路SWsm处于开启状态,连接恒流源11和数据线SEGm。这样,通过从恒流源11供给电流使有机EL元件PEm,n发光。非选择的扫描线COMn的行和非选择的有机EL元件PEm、n,一般为了防止因有机EL元件PEm、n的半激励状态引起的串扰从而造成发光不良的状况,将扫描线COMn的电位控制在电源电压电平,数据线SEGm的电位控制在GND电平,形成反向偏压的状态。
在放电期间,为了防止因前一帧的残留电荷引起下一帧的发光不良现象,将所有的数据线SEGm和扫描线COMn作为地电位Vss使有机EL元件PEm、n的负载电容复位为0(偏压为0)。
(比如,参照专利文献1)
专利文献1专利第3507239号
但是,在以前的面板显示装置的驱动电路和面板显示装置的驱动方法中,因为是通过恒流源进行充电,所以充电达到发光所需的电压值的上升要花很多时间,因此,会出现有机元件的发光亮度下降及显示不均匀的问题。
发明内容
为了解决上述课题,本发明的面板显示装置的驱动电路是驱动分别设置在多条数据线和多条扫描线交叉点的发光元件的面板显示装置的驱动电路,其特征是具备:在将上述发光元件的负载电容充电到发光所需的电压值的上升期间将选择的上述数据线和上述电源电位连接的电压控制电路;以及经过上述上升期间后,将上述数据线和上述恒流源连接的驱动控制电路。
另外,本发明的面板显示装置的驱动方法的特征在于:在将上述发光元件的负载电容充电达到发光所需的电压值的上升期间,将选择的上述数据线和上述电源电位连接,在上述上升期间后,将上述数据线和上述恒流源连接。
本发明的面板显示装置的驱动电路及面板显示装置的驱动方法,在充电达到发光所需的电压值的上升会加快,因此有可能实施高速的充电。
附图说明
图1是本发明第1实施方式中的面板显示装置的驱动电路的构成图(其1)。
图2是用来说明本发明第1实施方式中面板显示装置的驱动操作的时序图。
图3是本发明第1实施方式中的面板显示装置的驱动电路的构成图(其2)。
图4是本发明第1实施方式中的面板显示装置的驱动电路的构成图(其3)。
图5是本发明第1实施方式中的面板显示装置的驱动电路的构成图(其4)。
图6是本发明第1实施方式中的面板显示装置的驱动电路的构成图(其5)。
图7是本发明第1实施方式中电压控制电路的构成图。
图8是用来说明本发明第2实施方式中面板显示装置的驱动操作的时序图。
图9是以前的面板显示装置的驱动电路的结构图。
图10是用来说明以前的面板显示装置的驱动操作的时序图。
符号的说明
10驱动控制电路
11恒流源
12电压控制电路
20扫描线用的电源
30数据线用的电源
SEGm 数据线
COMn 扫描线
SWsm,SWcn 开关电路
PEm、n 有机EL元件
Vss 地电位
具体实施方式
下面,参照图示,就实施本发明的最佳方式进行说明。另外,图中,在能理解本发明的范围内,只将各构成成分的形状、大小和设置关系概略地表示出来,本发明并不被其所限定。
图1是表示本发明第1实施方式的面板显示装置的驱动电路的构成图。有机EL面板显示装置具有分别设置在多条数据线(阳极线、SEG)及多条扫描线(阴极线、COM)的交叉点的作为发光元件的有机EL元件PEm、n,(m≥1,n≥1)。
本发明的面板显示装置的驱动电路,具备在每条数据线SEGm(m≥1)上与恒流源11和地电位Vss的某一个连接的第1开关电路SWsm(m≥1)、在每条扫描线COMn(n≥1)上与扫描线用的电源20(电源电位Vcc)和地电位Vss的某一个连接的第2开关电路SWcn(n≥1)、在每条数据线SEGm上与数据线用的电源30(电源电位Vdd)连接的第3开关电路SWvm(m≥1)。另外,第1和第2开关电路SWsm、SWcn通过驱动控制电路10进行转换,这样,对有机EL元件PEm、n进行选择、非选择。另外,第3开关电路SWvm通过电压控制电路12的输出,选择性地将数据线SEGm与电源电位Vdd连接。
第1和第2开关电路SWsm、SWcn,比如可由通过从驱动控制电路10输出的各自独立的控制信号而能控制的PMOS晶体管和NMOS晶体管构成。第3开关电路SWvm,比如可由通过从电压控制电路12输出的信号而能控制的PMOS晶体管和NMOS晶体管构成。
电压控制电路12在有机EL元件PEm、n的负载电容充电达到发光所需的电压值的上升期间,将选择的数据线SEGm与电源电位Vdd连接,在此上升期间后,电压控制电路12切断数据线SEGm和电源电位Vdd的连接。这样,驱动控制电路10就连接了数据线SEGm和恒流源11。
电压控制电路12如图7所示,由寄存器电路、计数电路、比较电路和逻辑电路构成,首先,输入控制信号,通过逻辑电路使第3开关电路SWvm处于开启状态。其次,输入寄存器电路的表示希望时间的设定数据和计数电路的计数值一致的话,通过比较电路的输出,通过逻辑电路,使第3开关电路SWvm处于关闭状态。
下面,用图2所示的时序图说明本发明第1实施方式的面板显示装置的驱动操作。
通过将扫描线COMn的开关电路SWcn在一定时间(一帧期间)间隔内处于开启状态、关闭状态,按顺序选择发光的面板行。这里,在开启状态,与地电位Vss连接,在关闭状态,与电源电位Vcc连接。
在放电期间P1中,将有机EL元件PEm、n的负载电荷复位,在充电期间P2中,使1扫描线处于开启状态,使连接的被选择的有机EL元件PEm、n发光。
本发明的第1实施方式中,在放电期间P1中,将所有的数据线SEGm和扫描线COMn作为地电位Vss,使有机EL元件PEm、n的负载电容复位为0后,在充电期P2开始时,通过电压控制电路12在某一段时间内使开关电路SWvm处于开启状态,将数据线SEGm的电位提高到某一特定电位。
详细说明的话,首先,如图2所示,在充电期P2(t2’~t3期间)中,通过将开关电路SWs1与恒流源11连接,将开关电路SWc1与地电位Vss连接,使有机EL元件PE1,1发光。其次如图3所示,在t3时刻,进入放电期间,将所有的开关电路SWsm和SWcn与地电位Vss连接,将有机EL元件PEm、n的负载电荷复位为0。在t4时刻,如图4所示,进入充电期间,将开关电路SWsm关闭,将开关电路SWc1和电源电位Vcc连接后,通过电压控制电路12开启开关电路SWvm,直到t4’时刻和Vdd连接,将有机EL元件PEm、n的负载电容充电到某一特定电位(目标电位Vsm)。其后如图5所示,通过电压控制电路12关闭开关电路SWvm,将数据线SEGm保持在特定电位(Vsm±α(α为任意))。在t4‘时刻,如图6所示,立刻将开关电路SWs2与恒流源11连接,将非选择数据线的开关电路与地电位Vss连接,将开关电路SWc2和地电位Vss连接,使有机EL元件PE2,2发光。
综上所述,因为在本发明的第1实施方式中,设置了电压控制电路12和开关电路SWvm,选择发光元件时,充电期间的上升中在规定期间与上述电源电位连接,规定期间后,与恒流供给源连接,所以能高速实施充电。通过电压控制电路12,能调整开关电路SWvm的开启时间,所以可以调整充电能力。因此可以将数据线设置在特定的电位上,能根据面板的负载特性来调整设定电位。另外,电压控制电路12,其构成是不从稳压器产生的电压提供特定电压,所以电路规模变小。
接下来,用如图8所示的时序图,对本发明的第2实施方式的面板显示装置的驱动操作进行说明。
这里,面板显示装置的驱动电路的构成可以用与本发明的第1实施方式一样的实施。
本发明的第2实施方式与第1实施方式不同,其特征是以H电平来实施放电。
在期间P1中,如图4所示,关闭开关电路SWsm,将开关电路SWc1与电源电位Vcc连接后,通过电压控制电路12开启开关电路SWvm,将有机EL元件PEm、n的负载电荷充电到某一特定电位(目标电位Vsm)。(以H电平来实施放电)。
之后如图5所示,在期间P2中,通过电压控制电路12关闭开关电路SWvm,使数据线SEGm保持在特定电位(Vsm±α(α为任意))上。在t4时刻,如图6所示,立刻将开关电路SWs2与恒流源11连接,将非选择数据线的开关电路与地电位Vss连接,将开关电路SWc2与地电位Vss连接,使有机EL元件PE2,2发光。
综上所述,在本发明的第2实施方式中,充电后,没有放电,换句话说,就是没有使有机EL元件的电荷为0,所以能大幅度减少功率消耗。
Claims (15)
1.一种面板显示装置的驱动电路,用于驱动分别设置在多条数据线和多条扫描线的交叉点的发光元件,其特征在于具备:
电压控制电路,在将上述发光元件的负载电容充电到发光所需的电压值为止的上升期间,将选择的上述数据线和电源电位连接;以及
驱动控制电路,在上述上升期间后,将上述数据线和恒流源连接。
2.如权利要求1所述的面板显示装置的驱动电路,其特征在于具备:
第1开关电路,将上述每条数据线与恒流源和地电位中的某一个连接;
第2开关电路,将上述每条扫描线与电源电位和地电位的某一个连接;
第3开关电路,将上述每条数据线与电源电位连接;
上述驱动控制电路,通过上述第1和第2开关电路的切换,进行上述发光元件的选择和非选择;以及
上述电压控制电路,采用第3开关电路(SWvm),选择性地控制数据线(SEGm)和电源电位(Vdd)的连接。
3.如权利要求1所述的面板显示装置的驱动电路,其特征在于:
选择上述发光元件时,在将上述扫描线连接在上述接地线的状态下,将上述数据线连接在上述电源电位;
在规定期间后将上述数据线和上述恒流源连接;
在非选择上述发光元件时,在将上述扫描线连接在上述电源电位的状态下,将上述数据线连接在上述接地线上。
4.如权利要求1所述的面板显示装置的驱动电路,其特征在于:包含将所有的多条上述数据线和多条上述扫描线连接在地电位上,进行复位的工序。
5.如权利要求1所述的面板显示装置的驱动电路,其特征在于:上述驱动控制电路是由PMOS晶体管和NMOS晶体管构成的。
6.如权利要求1所述的面板显示装置的驱动电路,其特征在于:上述发光元件是有机EL元件。
7.如权利要求1所述的面板显示装置的驱动电路,其特征在于:上述上升电压控制电路是由设定数据寄存器电路和计数电路构成的。
8.如权利要求1所述的面板显示装置的驱动电路,其特征在于:在上述上升期间前具有放电期间,在上述放电期间,将上述发光元件的负载电容复位。
9.如权利要求8所述的面板显示装置的驱动方法,其特征在于:上述复位是将所有的多条上述数据线和多条上述扫描线连接在地电位上。
10.一种面板显示装置的驱动方法,用于驱动分别设置在多条数据线和多条扫描线交叉点的发光元件,其特征在于:
在将上述发光元件的负载电容充电到发光所需的电压值为止的上升期间,将选择的上述数据线和上述电源电位连接;
在上述上升期间后,将上述数据线和上述恒流源连接。
11.如权利要求10所述的面板显示装置的驱动方法,其特征在于:在上述上升期间前具有放电期间,在上述放电期间,将上述发光元件的负载电容复位。
12.如权利要求11所述的面板显示装置的驱动方法,其特征在于:上述复位是将所有的多条上述数据线和多条上述扫描线连接在地电位上。
13.如权利要求10所述的面板显示装置的驱动方法,其特征在于:
选择上述发光元件时,在将上述扫描线连接在上述接地线的状态下,将上述数据线连接在上述电源电位上,在规定期间后将上述数据线和上述恒流源连接;
非选择上述发光元件时,在将上述扫描线连接在上述电源电位的状态下,将上述数据线连接在上述接地线上。
14.如权利要求13所述的面板显示装置的驱动方法,其特征在于:包含将所有的多条上述数据线和多条上述扫描线连接在地电位上进行复位的工序。
15.如权利要求10所述的面板显示装置的驱动方法,其特征在于:以H电平来实施放电。
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JP2004223073A JP2006039456A (ja) | 2004-07-30 | 2004-07-30 | パネル表示装置の駆動回路およびパネル表示装置の駆動方法 |
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CN101593488B (zh) * | 2008-05-30 | 2012-07-18 | 索尼株式会社 | 电子电路及具有电子电路的面板 |
CN105388677A (zh) * | 2015-12-25 | 2016-03-09 | 电子科技大学 | 一种电致变色显示器件及其驱动方法 |
CN108877675A (zh) * | 2018-07-31 | 2018-11-23 | 京东方科技集团股份有限公司 | 一种像素电路、显示面板及其驱动方法、显示装置 |
CN111798800A (zh) * | 2020-07-21 | 2020-10-20 | 合肥维信诺科技有限公司 | 驱动电路、驱动方法、显示面板与显示装置 |
CN116312364A (zh) * | 2023-03-21 | 2023-06-23 | 惠科股份有限公司 | 显示面板的开机方法和显示面板 |
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JP3848358B1 (ja) * | 2006-02-15 | 2006-11-22 | 株式会社日出ハイテック | マルチチャネル駆動回路 |
JP5064696B2 (ja) * | 2006-02-16 | 2012-10-31 | ラピスセミコンダクタ株式会社 | 表示パネルの駆動装置 |
US7679586B2 (en) * | 2006-06-16 | 2010-03-16 | Roger Green Stewart | Pixel circuits and methods for driving pixels |
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JP5854212B2 (ja) * | 2011-12-16 | 2016-02-09 | 日本精機株式会社 | 発光装置及び有機el素子の駆動方法 |
JP6011942B2 (ja) * | 2013-12-17 | 2016-10-25 | 双葉電子工業株式会社 | 走査線駆動装置、表示装置、走査線駆動方法 |
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JP3507239B2 (ja) | 1996-02-26 | 2004-03-15 | パイオニア株式会社 | 発光素子の駆動方法及び装置 |
JP3765918B2 (ja) | 1997-11-10 | 2006-04-12 | パイオニア株式会社 | 発光ディスプレイ及びその駆動方法 |
JP4081852B2 (ja) | 1998-04-30 | 2008-04-30 | ソニー株式会社 | 有機el素子のマトリクス駆動方法及び有機el素子のマトリクス駆動装置 |
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JP2001286837A (ja) | 2000-04-06 | 2001-10-16 | Mitsubishi Heavy Ind Ltd | ローラの洗浄装置 |
JP3951687B2 (ja) * | 2001-08-02 | 2007-08-01 | セイコーエプソン株式会社 | 単位回路の制御に使用されるデータ線の駆動 |
KR100433216B1 (ko) * | 2001-11-06 | 2004-05-27 | 엘지.필립스 엘시디 주식회사 | 일렉트로 루미네센스 패널의 구동장치 및 방법 |
JP2003223140A (ja) | 2002-01-30 | 2003-08-08 | Toyota Industries Corp | Elディスプレイ装置及びその駆動方法 |
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KR100432554B1 (ko) * | 2002-11-29 | 2004-05-24 | 하나 마이크론(주) | 유기 전계 발광 디바이스 디스플레이 구동장치 및 방법 |
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2004
- 2004-07-30 JP JP2004223073A patent/JP2006039456A/ja active Pending
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CN116312364B (zh) * | 2023-03-21 | 2024-04-19 | 惠科股份有限公司 | 显示面板的开机方法和显示面板 |
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US7586471B2 (en) | 2009-09-08 |
US20060022911A1 (en) | 2006-02-02 |
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KR20060048817A (ko) | 2006-05-18 |
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