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首页> 外文期刊>International Journal of Photoenergy >Improvement in Brightness Uniformity by Compensating for the Threshold Voltages of Both the Driving Thin-Film Transistor and the Organic Light-Emitting Diode for Active-Matrix Organic Light-Emitting Diode Displays
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Improvement in Brightness Uniformity by Compensating for the Threshold Voltages of Both the Driving Thin-Film Transistor and the Organic Light-Emitting Diode for Active-Matrix Organic Light-Emitting Diode Displays

机译：通过补偿驱动薄膜晶体管和用于有源矩阵有机发光二极管显示器的有机发光二极管的阈值电压来改善亮度均匀性

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摘要

This paper proposes a novel pixel circuit design and driving method for active-matrix organic light-emitting diode (AM-OLED) displays that use low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) as driving element. The automatic integrated circuit modeling simulation program with integrated circuit emphasis (AIM-SPICE) simulator was used to verify that the proposed pixel circuit, which comprises five transistors and one capacitor, can supply uniform output current. The voltage programming method of the proposed pixel circuit comprises three periods: reset, compensation with data input, and emission periods. The simulated results reflected excellent performance. For instance, whenΔVTH=±0.33 V, the average error rate of the OLED current variation was low (<0.8%), and whenΔVTH_OLED=+0.33 V, the error rate of the OLED current variation was 4.7%. Moreover, when theI×R(current × resistance) drop voltage of a power line was 0.3 V, the error rate of the OLED current variation was 5.8%. The simulated results indicated that the proposed pixel circuit exhibits high immunity to the threshold voltage deviation of both the driving poly-Si TFTs and OLEDs, and simultaneously compensates for theI×Rdrop voltage of a power line.
机译：本文提出了一种新的像素电路设计和用于用于使用低温多晶 - 硅薄膜晶体管（LTPS-TFT）作为驱动元件的显示器电路设计和驱动方法。使用集成电路强调（AIM-SPICE）模拟器的自动集成电路建模仿真程序用于验证所提出的像素电路，该像素电路包括五个晶体管和一个电容器，可以提供均匀的输出电流。所提出的像素电路的电压编程方法包括三个时段：重置，补偿数据输入和发射周期。模拟结果反映了出色的性能。例如，当ΔVth=±0.33V时，OLED电流变化的平均误差率低（<0.8％），当ΔVth_oled= + 0.33V时，OLED电流变化的误差率为4.7％。此外，当电力线的×R（电流×电阻）降电压为0.3V时，OLED电流变化的误差率为5.8％。模拟结果表明，所提出的像素电路对驱动Poly-Si TFT和OLED的阈值电压偏差具有高免疫力，并且同时补偿电源线的Thi×Rdop电压。

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