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LED display screen drive circuit

A technology of LED display screen and driving circuit, which is applied in the direction of static indicators, instruments, etc., to achieve the effect of reducing impact, reducing dead point rate, and increasing service life

Inactive Publication Date: 2015-10-21
SUZHOU HEXINMEI ELECTRONICS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide an LED display drive circuit, which solves the phenomenon of dead spots caused by inconsistent working voltages of three-color LED lamps in the prior art

Method used

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, structure and working process of the present invention will be further described.

[0024] Such as figure 1 As shown, an LED display driving circuit includes LED lights and driver chips, three driver chips and three groups of LED lights form a display unit, each driver chip drives a group of LED lights, and the three groups of LED lights form a group Red LED lights, a group of green LED lights, a group of blue LED lights, each signal output pin of the driver chip is connected to a series LED light group, wherein, each group of series red LED lights is connected to the power supply Connect a resistor in series.

[0025] By connecting a resistor in series with the red LED light group, it can effectively divide the voltage, reduce the impact on the red LED light, increase the service life, and effectively reduce the dead point rate.

[0026] The drive chip includes 8 or 16 drive signal output pins, a control signal input pi...

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PUM

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Abstract

The invention discloses an LED display screen drive circuit, including LED lamps and drive chips. Three drive chips and three groups of LED lamps form a display unit. Each drive chip drives a group of LED lamps. The three groups of LED lamps are a group of red LED lamps, a group of green LED lamps and a group of blue LED lamps. Each signal output pin of each drive chip is connected with a serially-connected LED lamp group. A resistor is connected in series between each group of serially-connected red LED lamps and a power supply. A resistor is serially connected in the red LED lamp group for effectively dividing voltage, so that impact on the red LED lamps is reduced, the service life is prolonged, and the dead point rate is effectively reduced.

Description

technical field [0001] The invention belongs to the application field of electronic products, and in particular relates to an LED display driving circuit. Background technique [0002] LED display (LED panel): LED is light emitting diode, the English abbreviation of light-emitting diode, referred to as LED. It is a display method by controlling semiconductor light-emitting diodes. Its general appearance is composed of many light-emitting diodes, usually red, and characters are displayed by turning on and off the lights. A display screen used to display various information such as text, graphics, images, animations, market prices, videos, and video signals. Shenzhen is the origin of LED display R&D and production. At present, there are as many as 10,000 manufacturers of LED display screens in Shenzhen, among which Absen, Gloshine, and Zhongxiang are the leaders, followed by dark horses such as Shenzhen Jiuliang, Haideng, and Unilumin. The price of brand companies is genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
Inventor 朱霞高珺胡国良
Owner SUZHOU HEXINMEI ELECTRONICS SCI & TECH CO LTD
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