LED array integrated with Si driving circuits for LED printer printhead

Ogihara, Mitsuhiko; Fujiwara, H.; Mutoh, M.; Suzuki, Toshimitsu; Igari, T.; Sagimori, T.; Kurokawa, Haruhisa; Kaneto, T.; Furuta, H.; Abiko, I.; Sakuta, Masaaki

doi:10.1049/el:20061226

Cited by 22 publications

(15 citation statements)

References 6 publications

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“…4. We add a latch circuit, a control circuit and an MOSFET as a driver to control the brightness [8], [9]. There are different halftone patterns that drive the LED array; all control circuits can be integrated in a single chip [10].…”

Section: B Led Latch and Drivermentioning

confidence: 99%

Design and implementation of a digital LED desk lamp using the halftone method and a touch pad

Hung

Bai

Tsai

2011

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE)

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In this paper we propose a design of a digital LED desk lamp (DLDL) which consists of two parts: an LED array and a control unit with a touch pad. The LED array includes both LEDs and a constant current source not only to ensure that every LED receives a fixed current and but also to provide a uniform brightness. We use the halftone method which provides an on/off control for each LED of the array, transforms different gray levels into LED array patterns and uses those patterns to maintain digital levels of brightness. Our halftone method is similar to the PWM method of adjusting the brightness; however, it provides a digital control for the brightness of the LED array. In the digital control panel we use the capacitive sensor to design the touch pad and to replace the traditional mechanical button to provide a user-friendly interface.

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Section: B Led Latch and Drivermentioning

confidence: 99%

Design and implementation of a digital LED desk lamp using the halftone method and a touch pad

Hung

Bai

Tsai

2011

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE)

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“…A number of packaging technologies have been investigated including metal wiring, soldering, flip chip bonding, and anisotropic conductive film (ACF) bonding . Metal wiring and soldering are simple processes, but unsuitable for high resolution display . Flip chip bonding is preferred due to its short process time and reliable integration of microsized LEDs .…”

Section: Introductionmentioning

confidence: 99%

Micro Light‐Emitting Diodes for Display and Flexible Biomedical Applications

Lee

Shin

Park

et al. 2019

Adv Funct Materials

163

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Inorganic-based micro light-emitting diodes (µLEDs) have witnessed significant improvements in terms of display and biomedical applications, which can shift the paradigm of future optoelectronic systems. In particular, µLED displays are on the verge of becoming the next big interface platform for visual communications, expanding to various internet of things and wearable/bioapplications. Novel µLED concepts need to be upgraded to be able to satisfy their potential optoelectric applications, such as virtual reality, smart watches, and medical sensors for individual computing in this hyperconnected society. Here, representative progresses in the field of flexible µLEDs are reviewed with regard to device structures, massive µLED transfers, methods for performance enhancement, and applications.

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“…The integration of the light source and Si optical components is promising for future optical MEMS. In the integration of Si device and light source, monolithic and bonding technologies have been investigated [1,2]. Recently for GaN-based crystal growth on Si substrate, good crystals were reported [3,4].…”

Section: Introductionmentioning

confidence: 99%

GaN-LED grown on Si substrate by MBE/MOCVD and monolithic fabrication of a light distribution variable device

Wakui

Ito

Sameshima

et al. 2009

TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference

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Monolithic integration of GaN-based semiconductor with Si MEMS is demonstrated from a GaN/Si wafer, in which GaN crystal is grown by molecular beam epitaxy (MBE). A Light emitting diode is fabricated on the grown GaN crystal and the blue electro-luminescence is obtained. The GaN crystal property of is improved by using a template grown by metal organic chemical vapor deposition (MOCVD). A light distribution variable device with Si comb actuator is monolithically fabricated.

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LED array integrated with Si driving circuits for LED printer printhead

Cited by 22 publications

References 6 publications

Design and implementation of a digital LED desk lamp using the halftone method and a touch pad

Design and implementation of a digital LED desk lamp using the halftone method and a touch pad

Micro Light‐Emitting Diodes for Display and Flexible Biomedical Applications

GaN-LED grown on Si substrate by MBE/MOCVD and monolithic fabrication of a light distribution variable device

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