LED display screen driving circuit and display screen

Abstract

The invention relates to an LED display screen driving circuit and a display screen. The LED display screen driving circuit comprises an alternating current to direct current conversion module, an LED and a driving chip, wherein the alternating current to direct current conversion module is used for converting alternating-current voltage to direct-current voltage, and the constant-current driving end of the driving chip is connected with the cathode of the LED. The LED display screen driving circuit further comprises an intelligent power supply module, wherein the intelligent power supply module is connected between the alternating current to direct current conversion module and the anode of the LED, connected with the constant-current driving end of the driving chip, and used for converting the direct-current voltage output by the alternating current to direct current conversion module into the anode voltage of the LED and regulating and outputting the LED anode voltage which makes the driving chip to work in the minimum power consumption mode according to the constant-current driving end voltage of the driving chip. The LED display screen driving circuit and the display screen have the advantages of being low in power consumption, good in heat dissipation effect, capable of saving energy and environmentally friendly, and short-distance and long-time watching can be achieved.

Description

technical field [0001] The invention relates to an LED display screen driving circuit and a display screen. Background technique [0002] Relevant agencies predict that in 2014, the entire high-density small-pitch display is expected to reach a market increment of 2 billion. From the present point of view, small-pitch LED display screens have begun to enter the places dominated by DLP splicing products such as TV stations, high-end conference rooms, high-end consumer products, and simulations, and have occupied an increasing market share. Since traditional LED displays are mainly used in outdoor applications, the higher the brightness, the better, but it is different in indoor applications, and the brightness must be controlled within a certain range; at the same time, in order to meet the needs of display quality and video broadcasting, it is also necessary to ensure High enough grayscale and refresh rate. Relevant studies have found that in indoor applications, the brigh...

AI Technical Summary

Problems solved by technology

However, it is not easy to ensure a high refresh rate without reducing the gray scale, because the gray scale of the LED display using a traditional constant current driver chip will decrease as the brightness of the display screen decreases, and the refresh rate will decrease. It also fails to meet the requirements, which seriously affects the display effect

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