Source switching circuit with low‐gate‐driving loss in high‐voltage buck light emitting diode driver

2013 ◽  
Vol 6 (4) ◽  
pp. 663-671 ◽  
Author(s):  
Tse‐Ju Liao ◽  
Chia‐Chieh Hung ◽  
Chern‐Lin Chen
Keyword(s):  
High Voltage ◽  
Light Emitting Diode ◽  
Switching Circuit ◽  
Light Emitting ◽  
Gate Driving

scholarly journals A 3 W High-Voltage Single-Chip Green Light-Emitting Diode with Multiple-Cells Network

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
W. Wang ◽  
Y. Cai ◽  
Y. B. Zhang ◽  
H. J. Huang ◽  
W. Huang ◽  
...  
Keyword(s):  
High Voltage ◽  
Light Emitting Diode ◽  
Light Output ◽  
Green Light ◽  
Current Crowding ◽  
Single Chip ◽  
Light Output Power ◽  
Large Area ◽  
Light Emitting ◽  
Multiple Cells

A parallel and series network structure was introduced into the design of the high-voltage single-chip (HV-SC) light-emitting diode to inhibit the effect of current crowding and to improve the yield. Using such a design, a6.6×5 mm2large area LED chip of 24 parallel stages was demonstrated with 3 W light output power (LOP) at the current of 500 mA. The forward voltage was measured to be 83 V with the same current injection, corresponding to 3.5 V for a single stage. The LED chip’s average thermal resistance was identified to be 0.28 K/W by using infrared thermography analysis.

scholarly journals Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yen-Chih Chiang ◽  
Bing-Cheng Lin ◽  
Kuo-Ju Chen ◽  
Sheng-Huan Chiu ◽  
Chien-Chung Lin ◽  
...  
Keyword(s):  
High Voltage ◽  
Flip Chip ◽  
Light Emitting Diode ◽  
Bragg Reflector ◽  
Light Extraction ◽  
Efficiency Enhancement ◽  
Distributed Bragg Reflector ◽  
Light Emitting ◽  
Current Voltage ◽  
Current Voltage Characteristics

The GaN-based high-voltage flip chip light-emitting diode (HVFC-LED) is designed and developed for the purpose of efficiency enhancement. In our design, the distributed Bragg reflector (DBR) is deposited at the bonded substrate to increase the light extraction. After the flip chip process, the general current-voltage characteristics between the flip chip sample and the traditional sample are essentially the same. With the help of great thermal conductive silicon substrate and the bottom DBR, the HVFC-LED is able to enhance the power by 37.1% when compared to the traditional high-voltage LEDs. The wall-plug efficiencies of the HVFC-LED also show good droop reduction as high as 9.9% compared to the traditional devices.

scholarly journals The preparation and performance analysis of GaN-based high-voltage DC light emitting diode

2012 ◽  
Vol 61 (13) ◽  
pp. 138502
Author(s):  
Cao Dong-Xing ◽  
Guo Zhi-You ◽  
Liang Fu-Bo ◽  
Yang Xiao-Dong ◽  
Huang Hong-Yong
Keyword(s):  
Performance Analysis ◽  
High Voltage ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
And Performance

High Efficiency GaN-based High-voltage Light-emitting Diode Chips and Its Chip-on-board Packaging

2015 ◽  
Vol 36 (6) ◽  
pp. 692-698
Author(s):  
黄晓升 HUANG Xiao-sheng ◽  
黄华茂 HUANG Hua-mao ◽  
王洪 WANG Hong ◽  
李静 LI Jing
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Light Emitting

Effects of Electrostatic-Discharge on GaN-Based High Voltage Light-Emitting Diode

2014 ◽  
Vol 43 (8) ◽  
pp. 823003
Author(s):  
韩禹 HAN Yu ◽  
郭伟玲 GUO Wei-ling ◽  
樊星 FAN Xing ◽  
俞鑫 YU Xin ◽  
白俊雪 BAI Jun-xue
Keyword(s):  
High Voltage ◽  
Electrostatic Discharge ◽  
Light Emitting Diode ◽  
Light Emitting

Electrical and Optical Properties of a High-Voltage Large Area Blue Light-Emitting Diode

2013 ◽  
Vol 52 (8S) ◽  
pp. 08JG08 ◽  
Author(s):  
Wang Wang ◽  
Wei Wei ◽  
Cai Cai ◽  
Yong Yong ◽  
Huang Huang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
High Voltage ◽  
Light Emitting Diode ◽  
Large Area ◽  
Electrical And Optical Properties ◽  
Light Emitting

scholarly journals Research on the relationship between ideality factor and number of units of GaN-based high voltage light-emitting diode

2015 ◽  
Vol 64 (1) ◽  
pp. 017303
Author(s):  
Bai Jun-Xue ◽  
Guo Wei-Ling ◽  
Sun Jie ◽  
Fan Xing ◽  
Han Yu ◽  
...  
Keyword(s):  
High Voltage ◽  
Ideality Factor ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
The Relationship
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