Fabrication of LED full-color display matrix with small pixel

Jing Li; Bin Xue; Hua Yang; Lili Liu; Haizhong Xie; Yanrong Pei; Pengzhi Lu; Guohong Wang; Junxi Wang; Jinmin Li

doi:10.1117/12.2187643

17 September 2015 Fabrication of LED full-color display matrix with small pixel

Jing Li, Bin Xue, Hua Yang, Lili Liu, Haizhong Xie, Yanrong Pei, Pengzhi Lu, Guohong Wang, Junxi Wang, Jinmin Li

Proceedings Volume 9571, Fourteenth International Conference on Solid State Lighting and LED-based Illumination Systems; 95710Y (2015) https://doi.org/10.1117/12.2187643
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

With the development in material growth, device fabrication and packaging of LEDs, emission spectral of LED is able to cover the visible spectrum. In addition to the well-known lighting applications of LED, display is also one of the important applications of LED. In contrast with LCD, LEDs display has better contrast ratio, higher response rate, etc., which makes LEDs along with other self-illumination technologies an ideal candidate in making display panel. With the popularization of HD and Ultra HD standard, display panel with better image quality is needed. The number of pixels of the panel needs to be increased and the size of each pixel needs to be minimized. In this paper, we prepared a LED full-color display panel based on a 32×32 LED matrix with typical pixel size of 0.5mm. LED full-color display array with small pixel was obtained by mounting red LEDs, green LEDs and blue LEDs directly onto an isolating substrate such as sapphire . In addition, the substrate has metalized pads and connection before the matrix was connected to control unit. The control line and the column data line are prepared on the substrate, and there is an effective electrical insulation layers between them. The isolation layers consists of a SiO₂ layer of 1000nm and polyimide layer of 3000nm. Polyimide as an important electrical insulating layer, we study some properties of it, such as :PI amination rate as a function of the curing temperature, PI resistivity as a function of the curing temperature and the punction electric field intensity of PI as a function of the film thickness of PI.

Citation Download Citation

Jing Li, Bin Xue, Hua Yang, Lili Liu, Haizhong Xie, Yanrong Pei, Pengzhi Lu, Guohong Wang, Junxi Wang, and Jinmin Li "Fabrication of LED full-color display matrix with small pixel", Proc. SPIE 9571, Fourteenth International Conference on Solid State Lighting and LED-based Illumination Systems, 95710Y (17 September 2015); https://doi.org/10.1117/12.2187643

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KEYWORDS

Light emitting diodes

LED displays

LCDs

Dielectrics

LED lighting

Blue light emitting diodes

Silica

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