LED backlight: design, fabrication, and testing

Daniel M. Brown; Robert N. Dean Jr.; Jeremiah D. Brown

doi:10.1117/12.382830

17 April 2000 LED backlight: design, fabrication, and testing

Daniel M. Brown, Robert N. Dean Jr., Jeremiah D. Brown

Proceedings Volume 3938, Light-Emitting Diodes: Research, Manufacturing, and Applications IV; (2000) https://doi.org/10.1117/12.382830
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

This paper reports on work to determine the feasibility of fabricating a liquid crystal display (LCD) backlight using an array of LEDs. The purpose of this backlight is to overcome the efficiency loss of the absorptive color filters in the LCD. Two types of arrays were fabricated and tested. An array of white LEDs was designed for use with an interference color separation filter. An array of red, green, and blue LEDs was designed for use with a cylindrical lenslet array which focuses the three colors onto the appropriate color apertures of the LCD. Although promising results were achieved with standard off-the-shelf LEDs, significant improvements in surface radiance uniformity and efficiency could be obtained with special beam-shaping lenses on the LEDs.

Citation Download Citation

Daniel M. Brown, Robert N. Dean Jr., and Jeremiah D. Brown "LED backlight: design, fabrication, and testing", Proc. SPIE 3938, Light-Emitting Diodes: Research, Manufacturing, and Applications IV, (17 April 2000); https://doi.org/10.1117/12.382830

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