Pixel circuit and display device

Abstract

The invention relates to a pixel circuit comprising a first transistor, a second transistor, a third transistor, a first capacitor and a liquid crystal capacitor. A control terminal of the first transistor receives scanning signals, and a first terminal of the first transistor receives first data signals. A first terminal of the first capacitor is electrically coupled to a second terminal of the first transistor, and a second terminal of the first capacitor receives reference potential. A control terminal of the second transistor is electrically coupled to a first terminal of the liquid crystal capacitor, and a second terminal of the third transistor receives reference potential.

Description

technical field [0001] The present invention relates to a pixel circuit, in particular to a pixel circuit of a liquid crystal display device. Background technique [0002] figure 1 It is a circuit diagram of a pixel circuit of a conventional liquid crystal display device. like figure 1 As shown, the pixel circuit 100 includes a transistor 11 , a liquid crystal capacitor 12 and a storage capacitor 13 . The transistor 11 has a first terminal 11-1, a second terminal 11-2 and a control terminal 11-3. The control terminal 11-3 of the transistor 11 is used for receiving the scan signal Vscan, the first terminal 11-1 of the transistor 11 is used for receiving the data signal Vdata, and the second terminal 11-2 of the transistor 11 is electrically connected to the first terminal of the liquid crystal capacitor 12 12-1 and the first terminal 13-1 of the storage capacitor 13, the second terminal 12-2 of the liquid crystal capacitor 12 and the second terminal 13-2 of the storage ca...

AI Technical Summary

Problems solved by technology

Generally speaking, the storage capacitor 13 can help to stabilize the data potential stored in the liquid crystal capacitor 12, but when the operating frequency is higher such as Field Sequential (Field Sequential) display, or liquid crystal material with high dielectric coefficient such as blue phase liquid crystal, When a ferroelectric liquid crystal (Ferroelectric LC) display is used, a storage capacitor 13 with a larger capacitance value is needed to help stabilize the data potential stored in the liquid crystal capacitor 12, and this large-area storage capacitor 13 with a larger capacitance value will cause an aperture ratio ( Aperture Ratio) drops and loses brightness

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