Display driving circuit and display driving method

Abstract

The invention provides a display driving circuit and a display driving method. The display driving circuit includes a capacitor, an adder, an operational amplifier, a charging and discharging module,a control module and a conversion output module; a first end of the capacitor is electrically connected with the charging and discharging module, and a second end of the capacitor is grounded; a same-phase input end of the adder is electrically connected to the first end of the capacitor, first reference voltage accesses a reversal-phase input end of the adder, and an output end of the adder is electrically connected with a same-phase input end of the operational amplifier; a reversal-phase input end of the operational amplifier is electrically connected to the conversion output module, and acontrol end of the operational amplifier is electrically connected to the control module; a charging and discharging control signal accesses the charging and discharging module, and the charging and discharging module is controlled to charge or discharge the capacitor through the charging and discharging control signal, so that power high voltage output by the conversion output module drops or rises, uneven pixel charging caused by capacitance-resistance delay can be compensated for, and the image display effect is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display driving circuit and a display driving method. Background technique [0002] With the development of display technology, liquid crystal displays (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, televisions, personal Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates. The direction of the liquid crystal molecules...

AI Technical Summary

Problems solved by technology

The clock signal output by the timing controller includes two types of high potential and low potential, which respectively correspond to the high voltage (VGH) and low voltage (VGL) provided by the power management chip. As the size of the liquid crystal display device increases , the resistance-capacitance delay (RC delay) of the wiring in the liquid crystal display panel is also getting larger and larger, and the power supply high voltage (VGH) provided by the power management chip in the current liquid crystal display device is constant within one frame scanning time. Therefore, the potential of the scanning signal corresponding to each row of pixels is the same, and under the influence of resistance-capacitance delay, the charging effect of the pixels in the previous row will be better than the charging effect of the pixels in the latter row, resulting in uneven charging. affect picture quality

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