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Shifting register reducing bias voltage effect

A shift register, low-potential technology, used in static memory, digital memory information, instruments, etc., to reduce manufacturing costs, improve AC signal coupling effects, and improve product performance.

Active Publication Date: 2008-11-26
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the shift register 11 of the prior art can quickly pull the potential of the gate and source of the transistor 16 to V SS , but it needs to be provided with a DC voltage source V DD , and its transistors 18 and 20 receive the DC voltage source V for a long time DD It will also lead to the generation of bias effect (Stress). However, the design of the shift register in the current liquid crystal display is oriented towards the need not to set the DC voltage source V DD The direction of development to reduce manufacturing costs and improve product performance

Method used

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  • Shifting register reducing bias voltage effect
  • Shifting register reducing bias voltage effect

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Embodiment Construction

[0035] Please refer to FIG. 3 , which is a functional block diagram of the liquid crystal display 100 . The liquid crystal display 100 includes a liquid crystal display panel 112 , a gate driver 114 and a source driver 116 . The liquid crystal display panel 112 includes a plurality of pixels, and each pixel includes three pixel units 120 respectively representing three primary colors of red, green, and blue (RGB). The gate driver 114 outputs scanning signals to turn on the transistors 122 in each column sequentially, and at the same time, the source driver 116 outputs corresponding data signals to a whole column of pixel units 120 to charge them to their respective required voltages to display different grays. order. After the same row is fully charged, the gate driver 114 will turn off the scanning signal of the row, and then the gate driver 114 will output the scanning signal to turn on the transistor 122 of the next row, and then the pixel unit 120 of the next row will be ...

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Abstract

The related shift register comprises multilevel registers, every of which includes an output circuit to output a first drive signal, a first switch circuit to draw the circuit to a low potential before the drive signal, and a second switch circuit for signal receiving. Wherein, the first circuit applies potential of the input signal to hold charge in its parasitic capacitor and keep opening before the drive signal.

Description

technical field [0001] The present invention relates to a shift register, in particular to a shift register which utilizes the charge retained inside the transistor to reduce the bias effect (Stress) and the AC signal coupling effect (AC coupling). Background technique [0002] Displays with advanced functions have gradually become an important feature of today's consumer electronics products. Liquid crystal displays have gradually become widely used in various electronic devices such as mobile phones, personal digital assistants (PDAs), digital cameras, computer screens or notebook computer screens. monitor with high resolution color screen. [0003] The shift register is an important structure in the driving circuit of the liquid crystal display panel, which is used to drive the display circuits of various levels in the liquid crystal display panel. Therefore, the circuit design of the shift register has a decisive influence on the performance of the liquid crystal display...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C19/28G09G3/36
Inventor 张立勋林毓文郑咏泽
Owner AU OPTRONICS CORP
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