A three-channel LED driver with single line transportation technique

Caideng Yu; Yiying Du; Qiao Jiang; Yun Zhou; Jian Lv

doi:10.1117/12.971209

15 October 2012 A three-channel LED driver with single line transportation technique

Caideng Yu, Yiying Du, Qiao Jiang, Yun Zhou, Jian Lv

Proceedings Volume 8419, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy; 841929 (2012) https://doi.org/10.1117/12.971209
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

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.

Citation Download Citation

Caideng Yu, Yiying Du, Qiao Jiang, Yun Zhou, and Jian Lv "A three-channel LED driver with single line transportation technique", 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); https://doi.org/10.1117/12.971209

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