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LED display drive system, control method and LED display

A technology of display driving and control method, applied in the field of display screen, can solve the problem of wrong brightness and darkness of lamp beads, and achieve the effect of eliminating open-circuit caterpillars or short-circuit caterpillars

Active Publication Date: 2018-08-07
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The embodiment of the present invention provides an LED display driving system, a control method and an LED display screen, so as to at least solve the technical problem of the LED display system in the prior art that other lamp beads are wrongly brightened or darkened due to the open circuit or short circuit of the LED lamp bead.

Method used

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  • LED display drive system, control method and LED display
  • LED display drive system, control method and LED display
  • LED display drive system, control method and LED display

Examples

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Embodiment 1

[0026] According to an embodiment of the present invention, an embodiment of an LED display driving system is provided, image 3 It is a schematic structural diagram of an LED display driving system according to an embodiment of the present invention, such as image 3 As shown, the LED display drive system includes:

[0027] The lamp bead detection circuit 30 is used to detect the working state of the lamp bead in the LED display system, and the working state includes: open circuit or short circuit.

[0028] When the lamp bead in the LED display system fails, the row or column where the faulty lamp bead is located will produce wrong dark lights. Under normal circumstances, the faults of lamp beads are divided into two types: open circuit fault and short circuit fault.

[0029] Figure 4 It is a schematic diagram of the structure of a lamp bead in a display screen according to the prior art when it is short-circuited. In an optional embodiment, combined with Figure 4 For e...

Embodiment 2

[0061] According to an embodiment of the present invention, an embodiment of a control method for an LED display driving system is provided. It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions , and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0062] Figure 8 It is a control method of an LED display driving system according to an embodiment of the present invention. The line erasure potential LED display driving system includes: a lamp bead detection circuit, a line erasure control circuit and a line erasure circuit, such as Figure 8 As shown, the method includes the following steps:

[0063] In step S802, the lamp bead detection circuit detects the working state of the lamp bead in the LED display system, wherein the working ...

Embodiment 3

[0081] According to an embodiment of the present invention, an LED display screen is provided, and the LED display screen includes any one of the LED display driving systems in Embodiment 1.

[0082] Since it is proposed in Embodiment 1 of the present application that the LED display drive system adjusts the line vanishing potential to ensure that when the lamp bead is open or short-circuited, the voltage at both ends of the lamp bead that does not need to be lit is less than the threshold voltage of the lamp bead, thereby ensuring that there is no error At the same time, because the lamp bead detection circuit is used to detect the state of the lamp bead, and the row disappearing control circuit is used to control the row disappearing circuit, the row disappearing potential is adjusted, that is, the row disappearing potential can be adjusted according to the row disappearing potential. The control of the shadow disappearing control circuit can be adjusted up, and it can also b...

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PUM

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Abstract

The invention discloses an LED display drive system, a control method and an LED display. The system comprises a lamp bead detection circuit which is used for detecting the working state (open-circuit or short-circuit) of the lamp beads in an LED display system, a line shadow elimination control circuit which is electrically connected with the lamp bead detection circuit and used for generating control information according to the working state of the lamp beads, and a line shadow elimination circuit which is electrically connected with the line shadow elimination control circuit and used for making the shadow elimination potential rise or fall according to the control information generated by the line shadow elimination control circuit. The technical problem in the prior art that mistaken switching on-off of other lamp beads due to open circuit or short circuit of an LED lamp bead in the LED display system cannot be solved at the same time is solved.

Description

technical field [0001] The invention relates to the field of display screens, in particular to an LED display driving system, a control method and an LED display screen. Background technique [0002] figure 1 It is a structural schematic diagram of a display screen according to the prior art, figure 2 It is a schematic diagram of potential changes when a display screen performs line switching according to the prior art. When performing row switching, the potentials V1 and V2 on row line 1 and row line 2 are as follows: figure 2 shown. combine figure 1 and figure 2 As shown, the reason for line smear can be known: figure 1 The LED driver chip in the LED driver chip includes a PMOS switch tube. Since the opening and closing of the PMOS switch tube and the discharge of the charge on the parasitic capacitance of the row line all take a period of time, in figure 2 During the time period t shown in the figure, the potentials of V1 and V2 are both sufficient to light up ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/00
CPCG09G3/006G09G3/32
Inventor 唐永生王勇张汉儒
Owner CHIPONE TECH BEIJINGCO LTD
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