Source driver module and liquid crystal display
A technology for driving modules and source driver chips, applied to static indicators, instruments, etc., can solve problems such as varying degrees of afterimages and affecting the viewing effect of liquid crystal displays, so as to eliminate afterimages, improve viewing effects and user experience Effect
Active Publication Date: 2019-08-20
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology
[0004] However, the VCOM voltage and Data voltage of the existing TFT LCD have different power-down speeds, that is, there will be a voltage difference between VCOM and Data during the shutdown process. When the voltage difference between the two is greater than 2V, the human eye will feel Afterimages similar to flickering appear, and when used with different source driver modules, the degree of afterimages is different, which will affect the viewing effect of the LCD
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0021] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Ground connection, or integral connection; can be mechanical connection; can be directly connected, can also be indirectly connected through an intermediary, and can be i...
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Provided are a source driver module and a liquid crystal display. The source driver module comprises a gamma driver chip (10) and a source driver chip (30) connected to a liquid crystal display unit (90). The gamma driver chip (10) comprises a plurality of load circuits (15), as well as a plurality of gamma output circuits (11) and a common electrode output circuit (13) connected to the source driver chip (30). The gamma output circuits (11) and the common electrode output circuit (13) are respectively used for controlling the source driver chip (30) to output data signal voltage and common electrode voltage to the liquid crystal display unit (90). During power off, both the gamma output circuits (11) and the common electrode output circuit (13) can be connected to a load circuit (15) so as to adjust power down speeds of the data signal voltage and the common electrode voltage. The source driver module and the liquid crystal display can control the power down speeds of the data signal voltage and the common electrode voltage during power off, so as to reduce the voltage difference between the data signal voltage and the common electrode voltage, thereby eliminating a residual image problem of power-off scintillation caused by the voltage difference.
Description
technical field [0001] The invention relates to the field of liquid crystal display drive, in particular to a source drive module and a liquid crystal display with the source drive module. Background technique [0002] Liquid Crystal Display (LCD) is a flat and ultra-thin display device. Due to its low power consumption, high image quality, small size, and light weight, it is favored by everyone and has become a display device. mainstream. At present, liquid crystal displays are mainly based on thin film transistor (Thin Film Transistor, TFT) LCD, and the liquid crystal display panel is the main component of the liquid crystal display. The liquid crystal layer between the film substrate and the TFT array substrate. [0003] The driving of the liquid crystal display panel is usually realized by the gate drive module and the source drive module respectively providing the scan signal and the data signal (Data) to the liquid crystal display unit, and the difference between the...
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IPC IPC(8): G09G3/36
Inventor 李文芳张先明
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD