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Visible-Light Communications Using a CMOS-Controlled Micro-LightEmitting-Diode Array
Jonathan J. D. McKendry, David Massoubre, Shuailong Zhang, Bruce R. Rae, Richard P. Green, Erdan Gu, Robert K. Henderson, A. E. Kelly, and Martin D. Dawson, Fellow, IEEE
rescindâ€"We report the high-frequency conversion of individual pixels in 8 8 militarys of III-nitride-based micro-pixellated light-emitting diodes, where the pixels within the array range from 14 to 84 m in diameter. The peak emission wavelengths of the devices ar 370, 405, 450 and 520 nm, respectively. Smaller welkin micro-LED pixels generally exhi point higher modulation bandwidths than their larger area counterparts, which is attributed to their ability to be driven at higher actual densities. The highest optical dB modulation bandwidths from these devices are shown to be in excess of 400 MHz, which, to our knowledge, are the highest bandwidths yet reported for GaN LEDs. These devices are also integrated with a complementary metal-oxide-semiconductor (CMOS) driver array chip, allowing for simple computer control of individual micro-LED pixels.
The bandwidth of the integrated micro-LED/CMOS pixels is shown to be up to 185 MHz; data transmission at bit rates up to 512 Mbit/s is demonstrated using on-off keying non return-to-zero modulation with a bit-error ratio of less than , using a 450 nm-emitting 24 m diameter CMOS-controlled micro-LED. As the CMOS chip allows for up to 16 independent data inputs, this device demonstrates the potential for multi-Gigabit/s latitude data transmission using CMOS-controlled micro-LEDs. Index Termsâ€"complementary metal-oxide-semiconductor (CMOS), GaN, micro-light-emitting diodes (micro-LEDs), modulation, visible light communications (VLC).
I. INTRODUCTION IGHT-EMITTING diodes based on the AlInGaN alloy system promise energy-ef?cient light generation crossways the visible spectrum and beyond. In particular,...If you want to get a abounding essay, order it on our website: Orderessay
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