Circuit and method for eliminating LED display screen ghost image and caterpillar phenomenon

Abstract

The invention provides a circuit and method for eliminating an LED display screen ghost image and a caterpillar phenomenon, relates to the field of LED drive design and is to solve the technical problems of system clock occupation, partial discharge of used parasitic capacitors, larger number of used control chips, large wiring difficulty of a printed circuit board, un-thorough settlement of the ghost images and the caterpillar phenomenon, limited refresh frequency and high cost and the like in the prior art. The circuit for eliminating the LED display screen ghost image and the caterpillar phenomenon mainly comprises a line drive chip discharge unit, a row drive chip charge unit and a row drive chip discharge unit. The line drive chip discharge unit is connected with the anode end of an LED lamp; and the row drive chip charge unit is connected with the row drive chip discharge unit and the cathode end of the LED lamp. Through cooperation of line drive chips and row drive chips, the LED lamp is charged and discharged to eliminate the ghost image and the caterpillar phenomenon, thereby improving display quality of the LED display screen obviously.

Description

technical field [0001] The invention relates to the field of LED drive design, in particular to a circuit and method for eliminating ghost images and caterpillar phenomena on LED display screens. Background technique [0002] With the hot discussion of global economic development and environmental protection, LED has attracted much attention in the field of information display due to its advantages of high efficiency and green environmental protection. The proportion of green LED display in the field of information display is increasing day by day, and its share in the display market is increasing day by day. It is inseparable from the LED display drive control technology that supports its rapid development. Therefore, the pros and cons of LED display driver chips play a crucial and even decisive role in the economic benefits of the entire LED display. [0003] At the same time, many disadvantages of LED displays are also increasingly apparent. Among them, ghost images and ...

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Problems solved by technology

[0006] In view of the above-mentioned prior art, the purpose of the present invention is to provide a circuit and method for eliminating ghost images and caterpillars on LED display screens, which aims to solve the problem of system clock occupation in the prior art, incomplete discharge of the used parasitic capacitors, and so on. The number of control chips used is large, the wiring of the printed circuit board is difficult, the phenomenon of ghosts and caterpillars is not completely solved, the refresh frequency is limited and the cost is high, etc. Technical problems

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