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Active-Matrix Pixelated-LED Control System for Automotive Headlamps
- Source :
- IEEE Access, Vol 10, Pp 45553-45561 (2022)
- Publication Year :
- 2022
- Publisher :
- IEEE, 2022.
-
Abstract
- This paper presents a driving circuitry system for high-resolution, pixelated-LED automotive headlamps. The system consists of an array of pixel drivers, and a row/column driver suitable for an active-matrix array configuration with the individual dimming control capabilities on each pixelated-LED. An asynchronous serial communication protocol is introduced to minimize the number of data transmission interface signals between the row/column driver and pixel drivers. The proposed pixel driver is designed to drive each pixelated-LED with constant current and pulse width modulation (PWM). It contains a memory cell for dimming data, and a sample-and-hold driver stage to minimize the static power consumption of the pixel driver. The proposed system has been fabricated by using a 0.18- $\mu \text{m}$ CMOS process. The test chip includes a $2\times16$ pixel array with an embedded row/column driver. The functional operation has been verified with an $8\times16$ LED array system prototype.
Details
- Language :
- English
- ISSN :
- 21693536
- Volume :
- 10
- Database :
- Directory of Open Access Journals
- Journal :
- IEEE Access
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.6e78ce8545f54be49c397711857081a2
- Document Type :
- article
- Full Text :
- https://doi.org/10.1109/ACCESS.2022.3170113