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LED array drive circuit, drive chip and LED display screen

A technology of LED array and driving circuit, applied in the direction of measuring electricity, measuring electrical variables, static indicators, etc., can solve the problem of inability to locate the location of the dead point of caterpillars, and achieve the effect of improving maintenance efficiency, reducing maintenance difficulty and high efficiency

Active Publication Date: 2019-11-05
SHENZHEN AOTO ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to address the problem that the existing LED display screen cannot locate the dead point in the caterpillar phenomenon using scanning drive, and propose a LED array drive circuit, drive chip, LED display screen and short-circuit point positioning method

Method used

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  • LED array drive circuit, drive chip and LED display screen
  • LED array drive circuit, drive chip and LED display screen
  • LED array drive circuit, drive chip and LED display screen

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Embodiment Construction

[0042] In order to better understand the above objects, features and advantages of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0043] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

[0044] Unless otherwise defined, all technical and sc...

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Abstract

The invention relates to an LED array drive circuit, a drive chip, an LED display screen and a short-circuit point positioning method, and the drive circuit is used for assisting in detecting the position of a short-circuit point in an LED array, and comprises the LED array, a row drive array, a column drive module, a detection channel gating unit and a power supply, wherein the row driving arraycomprises a plurality of row channels, and the column driving module comprises a plurality of column driving channels for scanning and driving the LED array; the detection channel gating unit comprises a plurality of detection channels, and one detection channel is electrically connected with one column driving channel; and when the positions of the short-circuit points are detected, all the row channels are closed, one of the two column driving channels connected with the short-circuit points is opened, the other column driving channel is closed, the detection channel connected with the opened column driving channel is closed, and the detection channel connected with the closed column driving channel is opened, so that a path passing through the short-circuit points is formed. The position of the short-circuit point is greatly convenient to determine, the maintenance difficulty is reduced, and the maintenance efficiency is improved.

Description

technical field [0001] The invention relates to the field of LED display, in particular to an LED array driving circuit, a driving chip and an LED display screen. Background technique [0002] LED has the characteristics of low energy consumption, high brightness, bright colors, high stability, high refresh rate, and environmental protection, and is widely used in outdoor display, monitoring center, advertising / media display, stage and other scenes. With the advancement of technology and changes in market demand, LED displays are developing in the direction of small dot pitch and high resolution. LED lamp beads are getting smaller and smaller, resulting in smaller and smaller distances between the pins of the lamp beads. . Coupled with the influence of solder, short circuits or leakage problems are prone to occur between the pins of the lamp beads. At the same time, more and more LED chips are integrated inside the lamp bead, and the positions between the LED chips are get...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G01R31/02
CPCG09G3/32
Inventor 杨四化金重星何昆鹏吴振志吴涵渠
Owner SHENZHEN AOTO ELECTRONICS
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