The utility model relates to an organic light emitting diode display technology. The utility model discloses a thin film transistor pixel driving circuit of an organic light emitting display screen. The technical scheme of the utility model, the organic light emitting display TFT pixel driving circuit, including signal switching transistor, a driving transistor and a storage capacitor is connected with a driving transistor between gate and source in the said signal switching transistor with a scanning signal source is connected with the data signal, the drain electrode is connected to the gate of the drive transistor; the drive transistor is connected to the power source and drain to the organic light emitting diode anode; the organic light emitting diode cathode grounding; the storage capacitor consists of two parallel capacitor structure. The utility model improves the capacity of the storage capacitor through the method of parallel capacitance, reduces the consumption of electric power, shortens the turn-on delay of the driving transistor, and improves the performance of the circuit.
【技术实现步骤摘要】
本技术涉及有机发光二极管(OLED)显示技术,特别是有源矩阵有机发光显示屏(AM0LED),具体涉及一种低温多晶硅(LTPS)薄膜晶体管(TFT)像素驱动电路。
技术介绍
AMOLED (Active Matrix/Organic Light Emitting Diode)为有源矩阵有机发光二极管显示屏,或称为有源矩阵有机发光显示屏,具有反应速度较快、对比度更高、视角较广等特点。AMOLED像素电路的基本结构如图1所示,主要适用于低温多晶硅薄膜晶体管像素驱动电路。在有机发光二极管显示技术中,薄膜晶体管均为场效应晶体管。图1中用于数据信号传送和切断的晶体管T2称为信号切换晶体管,与有机发光二极管D连接的晶体管Tl称为驱动晶体管。通常晶体管Tl的工作电流要大于晶体管T2,在结构尺寸上也有所不同。为使其具有足够的电流驱动能力,晶体管Tl尺寸一般比晶体管T2大。图1中的电容Cs是一个存储电容,利用切换晶体管控制数据信号data来执行储存一个帧计时(frametiming)期间的数据信号的作用。电容Cs是薄膜电路中的结构电容,通常由硅有源层、栅金属(gate metal) ...
【技术保护点】
有机发光显示屏薄膜晶体管像素驱动电路,包括信号切换晶体管、驱动晶体管以及连接在所述驱动晶体管栅极和源极之间的存储电容,所述信号切换晶体管栅极接扫描信号,源极接数据信号,漏极与驱动晶体管的栅极连接;所述驱动晶体管源极接电源,漏极接有机发光二极管阳极;所述有机发光二极管阴极接地;其特征在于,所述存储电容由2只并联的电容构成。
【技术特征摘要】
1.有机发光显示屏薄膜晶体管像素驱动电路,包括信号切换晶体管、驱动晶体管以及连接在所述驱动晶体管栅极和源极之间的存储电容,所述信号切换晶体管栅极接扫描信号,源极接数据信号,漏极与驱动晶体管的栅极连接;所述驱动晶体管源极接电源,漏极接有机发光二极管阳极;所述有机发光二极管阴极接地;其特征在于,所述存储电容由2只并联的电容构成。2.根据权利要求...
【专利技术属性】
技术研发人员:赵大庸,徐正勋,崔晓燕,
申请(专利权)人:四川虹视显示技术有限公司,
类型:实用新型
国别省市:
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