Liquid crystal display with double-film transister pixel structure

Abstract

The invention provides a LCD of a double-film transistor pixel structure, containing first and second scanning lines, first and second signal lines, and pixel. The pixel contains pixel electrodes, and first and second transistors. The gates and sources of the first and second transistors are linked with the first and second scanning lines and the first and second signal lines, respectively, the drains of the two transistors are connected to the pixel electrodes. The first transistor channel's length-width ratio is less than the second one's.

Description

technical field [0001] The invention provides a liquid crystal display with double thin film transistor (TFT) pixel structure, especially a liquid crystal display with high resolution and high display frequency. Background technique [0002] Thin-film-transistor liquid crystal display (TFT-LCD) mainly uses thin-film transistors arranged in a matrix, and then cooperates with electronic components such as appropriate capacitors and connection pads to drive liquid crystal pixels, thereby producing rich and bright images. A traditional thin film transistor liquid crystal display basically includes a transparent substrate (transparent substrate), on which there are many thin film transistors arranged in multiple groups, pixel electrodes (pixel electrodes), and scan orgate lines perpendicular to each other (orthogonal) ) and signal line (data or signal line), a filter plate (color filter), and liquid crystal material filled between the transparent substrate and the filter plate, a...

AI Technical Summary

Problems solved by technology

Therefore, when the ratio of the channel width to the channel length of the thin film transistor 60 is increased, the capacitance value of the gate-drain capacitance is also increased, resulting in V FD value change

Especially when making a large-sized liquid crystal display, because the panel is too large, the current manufacturing process mostly divides the panel into several areas and exposes them in batches. There will be different offsets, coupled with the effect of increasing the ratio of channel width to channel length, it is quite easy to produce stitching defects, which makes the final liquid crystal display produce the phenomenon of shot mura, which becomes a process An insurmountable obstacle

[0012] Therefore, how to develop a liquid crystal display with high resolution and high display frequency can not only solve the problem of too short charging time, but also avoid line ripples ( shot mura) phenomenon has become a very important issue

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