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System-cascaded cross-stage LED driving data transmission circuit

A data transmission circuit, LED driving technology, applied in the direction of instruments, static indicators, etc., can solve the problem of large LED lamp beads not working normally, and achieve the effect of avoiding abnormal display and improving the fault tolerance rate.

Active Publication Date: 2022-04-05
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 cross-level LED drive data transmission circuit, which avoids the problem that large LED lamp beads cannot work normally in the prior art

Method used

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

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Embodiment

[0028] A system cascaded cross-level LED drive data transmission circuit, see figure 1 , including a plurality of sequentially connected LED driver chips 1;

[0029] The Xth LED driver chip 1 includes a first input terminal, a second input terminal and an output terminal, the first input terminal of the Xth LED driver chip 1 is connected to the output terminal of the X-1th LED driver chip 1, the first The second input terminal of the X LED driver chip 1 is connected to the input terminal of the Y LED driver chip 1, the output terminal of the X LED driver chip 1 is connected to the first input terminal of the X+1 LED driver chip 1, The output terminals of the Zth LED driver chip 1 are respectively connected; wherein, X, Y, Z∈N+, Z-X=X-Y≥2;

[0030] The Xth LED driver chip 1 is configured to simultaneously acquire the first drive data output from the output terminal of the X-1th LED driver chip 1 and the second drive data received by the input terminal of the Yth LED driver chi...

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Abstract

The invention provides a system-cascaded cross-stage LED driving data transmission circuit. The system-cascaded cross-stage LED driving data transmission circuit comprises a plurality of LED driving chips which are connected in sequence, the first input end of the Xth LED driving chip is connected with the output end of the (X-1) th LED driving chip, the second input end of the Xth LED driving chip is connected with the input end of the Yth LED driving chip, and the output end of the Xth LED driving chip is respectively connected with the first input end of the (X + 1) th LED driving chip and the output end of the Zth LED driving chip; and the Xth LED driving chip is configured to acquire the first driving data and the second driving data at the same time, select target driving data and output the driving data obtained according to the target 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, a chip is kept to acquire driving data with excellent signal strength to drive the LED lamp beads, meanwhile, the phenomenon of abnormal display caused by temporary damage of the chip can be avoided, and the error-tolerant rate is increased.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a system-cascaded cross-level 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 connect...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCY02B20/40
Inventor 林剑辉冯勇奇吴思雨
Owner SHENZHEN FM ELECTRONICS GRP CO LTD