Multiplexer, as well as data driving circuit and liquid crystal display panel applying multiplexer

A data drive circuit, multiplexer technology, applied in the direction of instruments, static indicators, etc., can solve problems such as unfavorable high-specification panel design, increase panel cost and complexity, output signal waveform distortion, etc. The effect of reducing the number and solving the distortion of the data signal

Inactive Publication Date: 2015-09-30
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

[0003] In the design of liquid crystal display panels, especially for the design of multiplexers used in data drive circuits, when using simple NMOS or PMOS for gate switch control, the parasitic capacitance will affect the control signal line (also called data line) caused by feedthrough (Feedthrough), so that the waveform of the output

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  • Multiplexer, as well as data driving circuit and liquid crystal display panel applying multiplexer
  • Multiplexer, as well as data driving circuit and liquid crystal display panel applying multiplexer
  • Multiplexer, as well as data driving circuit and liquid crystal display panel applying multiplexer

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] figure 1 It is a schematic diagram of the area distribution of the liquid crystal display panel. Such as figure 1 As shown, the areas of the liquid crystal display panel include: AA area 10 , GOA area 20 , Fanout area 30 , Demux area 40 , WOA area 50 , IC area 60 and FPC area 70 .

[0029] Wherein, the AA area (Active Area) 10 is an effective display area, which generally refers to an area for displaying graphics, and the area includes a plurality of sub-pixels. The GOA region 20, namely Gate On Array, is used to generate gate driving signals of TFTs in the panel. The Fanout area 30 is used for wiring connection between the IC and the data lines in the AA area 10 . The Demux area 40 is provided with a multiplexer for splitting the data lines drawn from ...

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Abstract

The invention provides a multiplexer, as well as a data driving circuit and a liquid crystal display panel applying the multiplexer. The multiplexer comprises a plurality of selecting modules, wherein one ends of the selecting modules are connected with the same data signal output end, and the other ends of the selecting modules are respectively connected with different data cables; each selecting module provides the data signal for a corresponding sub-pixel through the corresponding connected data cable after being gated; each selecting module comprises a switch, a first clock signal control end and a signal compensation unit; the first clock signal control end is connected with the control end of the switch, and outputs a first clock signal to control the on-off of the switch; the signal compensation unit is connected with the output end of the switch, and conducts signal compensation on errors of the data signal generated through transmission so as to eliminate signal distortion. According to the multiplexer, the problem of data signal distortion can be well solved, and besides, the panel design cost can be reduced to a certain extent.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a multiplexer, a data driving circuit and a liquid crystal display panel using the multiplexer. Background technique [0002] Liquid crystal display has a series of advantages such as low driving voltage and power consumption, small size, light weight, and no radiation. It has received extensive attention and developed very rapidly. It has become the mainstream technology of flat panel displays. [0003] In the design of liquid crystal display panels, especially for the design of multiplexers used in data drive circuits, when a simple NMOS or PMOS is generally used for gate switch control, the parasitic capacitance will affect the control signal line (also called data Line) causes the influence of feedthrough (Feedthrough), so that the waveform of the output signal is severely distorted. When using CMOS transmission gates for gate switch control, although the abov...

Claims

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Application Information

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IPC IPC(8): G09G3/36
Inventor 赵莽田勇易士娟
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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