CMOS-controlled color-tunable smart display

Shuailong Zhang; Zheng Gong; Jonathan J.D. McKendry; Scott Watson; Andrew Cogman; Enyuan Xie; Pengfei Tian; Erdan Gu; Zhizhong Chen; Guoyi Zhang; Anthony E. Kelly; Robert K. Henderson; Martin D. Dawson

doi:10.1109/JPHOT.2012.2212181

CMOS-controlled color-tunable smart display

Shuailong Zhang, Zheng Gong, Jonathan J.D. McKendry, Scott Watson, Andrew Cogman, Enyuan Xie, Pengfei Tian, Erdan Gu^*, Zhizhong Chen, Guoyi Zhang, Anthony E. Kelly, Robert K. Henderson, Martin D. Dawson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

We demonstrate a color-tunable smart display system based on a micropixelated light-emitting diode (μLED) array made from one InGaN epitaxial structure with high (0.4) indium mole fraction. When integrated with custom complementary metal-oxide-semiconductor (CMOS) electronics and a CMOS driving board with a field-programmable gate array (FPGA) configuration, this μLED device is computer controllable via a simple USB interface and is capable of delivering programmable dynamic images with emission colors changeable from red to green by tailoring the current densities applied to the μLED pixels. The color tunability of this CMOS-controlled device is attributed to the competition between the screening of piezo-electric field and the band filling effect. Comparable brightness of the μLED pixels emitting at different colors was achieved by adjusting the duty cycle. Further measurement suggests that this microdisplay system can also be used for high-speed visible light communications.

Original language	English
Article number	6262439
Pages (from-to)	1639-1646
Number of pages	8
Journal	IEEE Photonics Journal
Volume	4
Issue number	5
DOIs	https://doi.org/10.1109/JPHOT.2012.2212181
Publication status	Published - 2012
Externally published	Yes

Keywords

Complementary metal-oxide-semiconductor (CMOS)
InGaN
color tunability
microdisplay
microlight-emitting diodes (μLEDs)
visible light communications (VLC)

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10.1109/JPHOT.2012.2212181

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title = "CMOS-controlled color-tunable smart display",

abstract = "We demonstrate a color-tunable smart display system based on a micropixelated light-emitting diode (μLED) array made from one InGaN epitaxial structure with high (0.4) indium mole fraction. When integrated with custom complementary metal-oxide-semiconductor (CMOS) electronics and a CMOS driving board with a field-programmable gate array (FPGA) configuration, this μLED device is computer controllable via a simple USB interface and is capable of delivering programmable dynamic images with emission colors changeable from red to green by tailoring the current densities applied to the μLED pixels. The color tunability of this CMOS-controlled device is attributed to the competition between the screening of piezo-electric field and the band filling effect. Comparable brightness of the μLED pixels emitting at different colors was achieved by adjusting the duty cycle. Further measurement suggests that this microdisplay system can also be used for high-speed visible light communications.",

keywords = "Complementary metal-oxide-semiconductor (CMOS), InGaN, color tunability, microdisplay, microlight-emitting diodes (μLEDs), visible light communications (VLC)",

author = "Shuailong Zhang and Zheng Gong and McKendry, {Jonathan J.D.} and Scott Watson and Andrew Cogman and Enyuan Xie and Pengfei Tian and Erdan Gu and Zhizhong Chen and Guoyi Zhang and Kelly, {Anthony E.} and Henderson, {Robert K.} and Dawson, {Martin D.}",

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doi = "10.1109/JPHOT.2012.2212181",

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AU - Gong, Zheng

AU - McKendry, Jonathan J.D.

AU - Watson, Scott

AU - Cogman, Andrew

AU - Xie, Enyuan

AU - Tian, Pengfei

AU - Gu, Erdan

AU - Chen, Zhizhong

AU - Zhang, Guoyi

AU - Kelly, Anthony E.

AU - Henderson, Robert K.

AU - Dawson, Martin D.

PY - 2012

Y1 - 2012

N2 - We demonstrate a color-tunable smart display system based on a micropixelated light-emitting diode (μLED) array made from one InGaN epitaxial structure with high (0.4) indium mole fraction. When integrated with custom complementary metal-oxide-semiconductor (CMOS) electronics and a CMOS driving board with a field-programmable gate array (FPGA) configuration, this μLED device is computer controllable via a simple USB interface and is capable of delivering programmable dynamic images with emission colors changeable from red to green by tailoring the current densities applied to the μLED pixels. The color tunability of this CMOS-controlled device is attributed to the competition between the screening of piezo-electric field and the band filling effect. Comparable brightness of the μLED pixels emitting at different colors was achieved by adjusting the duty cycle. Further measurement suggests that this microdisplay system can also be used for high-speed visible light communications.

AB - We demonstrate a color-tunable smart display system based on a micropixelated light-emitting diode (μLED) array made from one InGaN epitaxial structure with high (0.4) indium mole fraction. When integrated with custom complementary metal-oxide-semiconductor (CMOS) electronics and a CMOS driving board with a field-programmable gate array (FPGA) configuration, this μLED device is computer controllable via a simple USB interface and is capable of delivering programmable dynamic images with emission colors changeable from red to green by tailoring the current densities applied to the μLED pixels. The color tunability of this CMOS-controlled device is attributed to the competition between the screening of piezo-electric field and the band filling effect. Comparable brightness of the μLED pixels emitting at different colors was achieved by adjusting the duty cycle. Further measurement suggests that this microdisplay system can also be used for high-speed visible light communications.

KW - Complementary metal-oxide-semiconductor (CMOS)

KW - InGaN

KW - color tunability

KW - microdisplay

KW - microlight-emitting diodes (μLEDs)

KW - visible light communications (VLC)

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EP - 1646

JO - IEEE Photonics Journal

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CMOS-controlled color-tunable smart display

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Keywords

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