Gamma voltage adjustment device and method

Abstract

The invention discloses a gamma voltage regulating device and method. A detector is arranged in a liquid crystal panel to be regulated and used for collecting the public electrode voltage and the pixel voltage in the liquid crystal panel; a gamma voltage regulating unit is provided with a plurality of ports and used for inputting the public electrode voltage and the pixel voltage collected by the detector, the public electrode voltage and the pixel voltage are processed through the regulating unit, and the gamma voltage with symmetrical positive voltage and negative voltage is output to the liquid crystal panel. By means of the gamma voltage regulating device and method, the luminance of the display panel meets the requirement of the feeling of the brain, meanwhile, the positive and negative symmetry of the pixel voltage about the public electric voltage is ensured to meet the requirement for polarity inversion, and direct current residue is avoided.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a gamma voltage adjusting device and method. Background technique [0002] In the CRT era of picture tubes, screen flickering is a very common failure, usually caused by insufficient refresh rate of the display card. In the era of liquid crystal displays, environmental protection, no radiation, and no flicker have become the biggest selling points of liquid crystal displays. However, when some users use LCD monitors, they will find that the LCD monitors that look good actually have flickering problems. Sometimes the screen shakes so badly that it is even worse than CRT monitors. [0003] Generally speaking, there are two reasons for the flickering of the LCD display, one is a soft fault, which can be eliminated by the user; the other is a real hardware fault, and there is no countermeasure for the flickering phenomenon of the LCD panel itself. [0004] After the LCD panel is p...

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Problems solved by technology

[0013] Although the above method will have a better effect in the middle grayscale (128 grayscale), it will have great limitations in the all-white area (255 grayscale) and all-black grayscale area (0 grayscale).

In the middle gray scale area, when the voltage changes slightly, the optics will change obviously. In the full black and full white gray scale, the optics is not sensitive to the voltage change, so although the voltage has a large range of changes, it cannot be displayed optically. out, the flicker value on the optical instrument will not change. At this time, this method of determining positive and negative symmetry is invalid

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