Patent
Pixel circuit, active matrix system, and display device
TLDR
In this paper, the authors proposed a pixel circuit consisting of five n channel thin-film transistors, each composed of the electro-optical element, one holding capacitor C 111, a sampling transistor 115, a drive transistor 111, switching transistor 112, a first detection transistor 114, and a second detection transistor 113.Abstract:
PROBLEM TO BE SOLVED: To reduce the number of constituting elements in a pixel circuit added with a compensation function with respect to fluctuations in the characteristics of electro-optical elements and fluctuations in the threshold voltages of transistors. SOLUTION: The pixel circuit 101 comprises five n channel thin-film transistors, each composed of the electro-optical element 117, one holding capacitor C 111, a sampling transistor 115, a drive transistor 111, a switching transistor 112, a first detection transistor 114, and a second detection transistor 113. The sampling transistor 115 samples the input signal from a signal line and holds the signal in the holding capacitor C 111. The drive transistor 111 drives the electro-optical element 117 with a current, according to the held signal potential. The first and second detection transistors 114 and 113 detect the threshold voltage of the transistor 111 and hold the detected potential in the holding capacitor C 111, in order to cancel the influence thereof, in advance. COPYRIGHT: (C)2006,JPO&NCIPIread more
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