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Proceedings Paper

A three-channel LED driver with single line transportation technique
Author(s): Caideng Yu; Yiying Du; Qiao Jiang; Yun Zhou; Jian Lv
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Paper Abstract

Designed a three-channel LED driver, realized the single-wire transmission of cascade signal between the drive IC of LED. Including the MCU digital interface, date register, clock synchronization, PWM grayscale adjustment circuit, as well as high voltage driver circuit for LED, etc… The driver control LED displaying 256 gray. Chip will generate synchronous sampling clock signals according to the received serial signals, when 24 bits dates have been received, the output pin begins to transport the dates followed-up which are automotive shaped to the input of the next chip. When the date receiving becomes low level that represent RESET, the red, green and blue channels will export different signals based on different input dates. Through the external MCU, it is realized the Separate luminance, and by connecting chips in series it achieved the control of outdoor big screen’ colorful display. The automatic shaping forward technique makes the number of chips cascading immune to the limitations of signal transmission, but only limited by the refresh speed.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8419, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy, 841929 (15 October 2012); doi: 10.1117/12.971209
Show Author Affiliations
Caideng Yu, Univ. of Electronic Science and Technology of China (China)
Yiying Du, Univ. of Electronic Science and Technology of China (China)
Qiao Jiang, Univ. of Electronic Science and Technology of China (China)
Yun Zhou, Univ. of Electronic Science and Technology of China (China)
Jian Lv, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 8419:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy
Yadong Jiang; Junsheng Yu; Zhifeng Wang, Editor(s)

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