Liquid crystal display device and display device

Abstract

The invention provides a liquid crystal display device and a display device. The display device includes a display unit, a common voltage generation circuit, a gamma correction circuit, a drive circuit and a power conversion circuit. The common voltage generating circuit provides the common voltage to the display unit. The gamma correction circuit outputs a gamma voltage. The driving circuit provides grayscale voltages to the display unit according to the gamma voltage. The power conversion circuit includes a first conversion circuit and a second conversion circuit. The first and second conversion circuits are both input ends for connecting with a power supply, and the rest are two parallel branches separated from each other and not connected to each other. The first conversion circuit generates a first power supply voltage, the second conversion circuit generates a second power supply voltage, and the first and second power supply voltages are respectively output to the gamma correction circuit and the common voltage generation circuit. The gamma correction circuit uses the first power supply voltage as a reference voltage to generate a gamma voltage. The common voltage generation circuit generates a common voltage with the second power supply voltage as a reference voltage.

Description

technical field [0001] The invention relates to a display technology, in particular to a liquid crystal display device and a display device. Background technique [0002] Display devices, such as liquid crystal display devices, due to the characteristics of the display medium (such as: liquid crystal), need a gamma correction circuit to provide multiple gamma voltages to perform gamma correction on the display data input by the signal source. The corrected display data, that is, the gamma voltage, and the common voltage generated by the common voltage generating circuit together drive the display device, so that the display device can display a display image with better color. [0003] However, the display device provides the same analog power supply voltage (AVDD) to the gamma correction circuit and the common voltage generation circuit as a reference voltage. The gamma correction circuit generates the plurality of gamma voltages according to the AVDD. The common voltage ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the display screen of the display device in the prior art is prone to crosstalk and affects the quality of the display screen, it is necessary to provide a display device with better display screen quality

[0005] In order to solve the technical problem that the display screen of the prior art liquid crystal display device is prone to crosstalk and affects the quality of the display screen, it is necessary to provide a liquid crystal display device with better display screen quality

Images