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Display driving chip and LED lamp panel

A technology of display driver and LED light string, applied in the direction of electrical components, etc., can solve the problems of unreasonable output voltage of power chip LED light board, LED array LED can not be lit normally, display driver chip heats up, etc., to avoid channel voltage Too low, realize automatic detection, reduce the effect of channel voltage

Pending Publication Date: 2022-05-06
XIAN TIBORS ELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, there are often situations where the output voltage of the power chip is unreasonable and causes problems with the LED light board. For example, the output voltage of the power chip is too high, which leads to the high voltage of the output point of a certain channel in the LED array, resulting in increased power consumption. , showing the problem of serious heating of the driver chip, and because each LED needs a certain turn-on voltage to emit light, when the output voltage of the power chip is too low, some LEDs in the LED array will not be able to be lit normally

Method used

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  • Display driving chip and LED lamp panel
  • Display driving chip and LED lamp panel
  • Display driving chip and LED lamp panel

Examples

Experimental program
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no. 1 example

[0039] like figure 1 As shown, the first embodiment of the present invention discloses a display driver chip 10 , which includes, for example: a plurality of voltage detection circuits 12 and detection output circuits 13 . figure 1 Two voltage detection circuits 12 are shown, but the present invention is not limited thereto.

[0040] Wherein, multiple voltage detection circuits 12 are used to connect corresponding multiple LED light strings, and the detection output circuit 13 is connected to multiple voltage detection circuits 12 . Wherein, each voltage detection circuit 12 is used to detect the voltage value of the correspondingly connected LED light string to obtain a measured voltage value, and compare the measured voltage value with the target voltage threshold value to obtain a voltage comparison signal and output it to the detection output circuit 13. The output circuit 13 is for generating a voltage detection signal output based on the voltage comparison signal output...

no. 2 example

[0058] like Figure 7 As shown, the second embodiment of the present invention discloses a display driver chip, for example including: a plurality of voltage detection circuits 22 , a detection output circuit 23 , a control circuit 24 , an output control circuit 25 and a first port 26 . Figure 7 Two voltage detection circuits 22 are shown, but the present invention is not limited thereto.

[0059] Wherein, a plurality of voltage detection circuits 22 are used to connect a plurality of corresponding LED light strings, and a detection output circuit 23 is connected to a plurality of voltage detection circuits 22 . A control circuit 24 is connected to each voltage detection circuit 22 . The threshold selection circuit 221 connects the control circuit 24 and the plurality of voltage detection circuits 22 . The output control circuit 25 is connected between the detection output circuit 23 and the first port 26 . Each voltage detection circuit 22 is used to detect the voltage va...

no. 3 example

[0080] like Figure 11 As shown, the third embodiment of the present invention discloses a display driver chip, for example including: a plurality of voltage detection circuits 32, a detection output circuit 33, a control circuit 34, a threshold selection circuit 321, an output control circuit 35, and a third port 36 , a current regulation circuit 37 , a fourth port 38 and a driving enhancement circuit 39 . Figure 11 Two voltage detection circuits 32 are shown, but the present invention is not limited thereto.

[0081] Wherein, multiple voltage detection circuits 32 are used to connect corresponding multiple LED lamp panels, and the detection output circuit 33 is connected to multiple voltage detection circuits 32 . A control circuit 34 is connected to each voltage detection circuit 32 . The threshold selection circuit 321 connects the control circuit 34 and each voltage detection circuit 32 . The output control circuit 35 is connected between the detection output circuit ...

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Abstract

The embodiment of the invention discloses a display driving chip and an LED lamp panel. The display driving chip comprises a plurality of voltage detection circuits used for connecting a plurality of corresponding LED lamp strings; the detection output circuit is connected with the plurality of voltage detection circuits; wherein each voltage detection circuit is used for detecting a voltage value of the corresponding LED lamp string to obtain a measured voltage value, comparing the measured voltage value with a target voltage threshold to obtain a voltage comparison signal, and outputting the voltage comparison signal to the detection output circuit; the detection output circuit is configured to generate a voltage detection signal output based on the voltage comparison signal output by each of the voltage detection circuits. According to the display driving chip disclosed by the embodiment of the invention, the channel voltage can be automatically detected.

Description

technical field [0001] The invention relates to the technical field of display control, in particular to a display driving chip and an LED light board. Background technique [0002] At present, the LED light board is equipped with an LED array, a power chip and a display driver chip. Both the display driver chip and the power chip are connected to the LED array. Light is emitted under driving control to realize image display. However, in the actual application process, there are often situations where the output voltage of the power chip is unreasonable and causes problems with the LED light board. For example, the output voltage of the power chip is too high, which leads to the high voltage of the output point of a certain channel in the LED array, resulting in increased power consumption. , showing the problem of serious heating of the driver chip, and because each LED needs a certain turn-on voltage to emit light, when the output voltage of the power chip is too low, som...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/345H05B45/50
CPCH05B45/345H05B45/50
Inventor 李晓王伙荣
Owner XIAN TIBORS ELECTRONIC TECH CO LTD