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System-cascaded LED driving data transmission circuit

A technology of data transmission circuit and LED drive, which is applied in the direction of electrical components, etc., can solve the problem that large LED lamp beads cannot work normally, and achieve the effect of avoiding abnormal display

Pending Publication Date: 2022-04-01
SHENZHEN FM ELECTRONICS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the present invention provides a system-cascaded LED drive data transmission circuit, which avoids the problem that the large LED beads in the prior art cannot work normally

Method used

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  • System-cascaded LED driving data transmission circuit
  • System-cascaded LED driving data transmission circuit
  • System-cascaded LED driving data transmission circuit

Examples

Experimental program
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Embodiment

[0027] A system cascaded LED drive data transmission circuit, see figure 1 , including a first driver chip 2 and a plurality of driver chips 3 connected in sequence;

[0028] The number of data input terminals of the first driver chip 2 is one, the data input terminals are connected to the external control card 1, and the data input terminals receive the LED driving data of the transmission circuit sent by the external control card 1;

[0029] Each driving chip 3 includes a data output terminal, and the driving chip 3 simultaneously obtains the LED driving data output by the data output terminals of at least two driving chips 3 forward, selects the target LED driving data from at least two of the LED driving data, and Through the data output end, the LED driving data obtained by driving the chip 3 backward is obtained according to the target LED driving data.

[0030] In this embodiment, it should be noted that the "external control card 1" described in this embodiment is "ex...

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PUM

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Abstract

The invention provides a system-cascaded LED driving data transmission circuit. The system-cascaded LED driving data transmission circuit comprises a first driving chip and a plurality of driving chips which are connected in sequence, the number of the data input end of the first driving chip is one, the data input end is connected with an external control card, and the data input end receives LED driving data, sent by the external control card, of the transmission circuit; each driving chip comprises a data output end, the driving chips forward and simultaneously acquire LED driving data output by the data output ends of the at least two driving chips, target LED driving data are selected from the at least two pieces of LED driving data, and the data output ends output LED driving data of the backward driving chips according to the target LED driving data. According to the circuit, the condition that large-area LED lamp beads in the LED lighting device are not turned on is reduced, the chip is kept to acquire LED driving data with relatively good signal intensity to drive the LED lamp beads, and meanwhile, the phenomenon of abnormal display caused by temporary damage of the chip can be avoided.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a system cascaded LED driving data transmission circuit. Background technique [0002] At present, in the field of LED lighting technology, each LED driver chip is usually connected in series. After the first LED driver chip receives the LED driving data, it will use the LED driver data to drive the LED lamp bead corresponding to the first LED driver chip. , and send the processed LED driving data to the next LED driving chip, the next LED driving chip receives the processed LED driving data, and processes the processed LED in a similar way as the first LED driving chip Drive data, and so on, to ensure that each LED driver chip can drive the corresponding LED lamp bead. [0003] Although this method can realize the driving of LED lamp beads with fewer chip pins, when there are external electrical influences in multiple LED driver chips connected in series, the LED dr...

Claims

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Application Information

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IPC IPC(8): H05B45/30H05B45/50
Inventor 冯勇奇吴思雨张敏
Owner SHENZHEN FM ELECTRONICS GRP CO LTD