Optoelectronics Letters

, Volume 13, Issue 2, pp 84–89 | Cite as

Effects of unit size on current density and illuminance of micro-LED-array

  • Chao Tian (田超)
  • Shu-xu Guo (郭树旭)
  • Jing-qiu Liang (梁静秋)
  • Zhong-zhu Liang (梁中翥)
  • Feng-li Gao (郜峰利)


A 300 μm×300 μm light emitting diode (LED) chip is divided into nine 80 μm×80 μm units with 30 μm spacing between adjacent ones. After arraying, the total saturation light output power and the maximum injection current are enhanced by 5.19 times and nearly 7 times, respectively. In addition, the test results demonstrate that the illuminance uniformity on the receiving surface reaches the optimum when the spacing between the arrays is equal to the maximum flat condition. The larger the number of arrays, the greater the area with uniform illuminance on the receiving surface.

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Copyright information

© Tianjin University of Technology and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Chao Tian (田超)
    • 1
    • 2
  • Shu-xu Guo (郭树旭)
    • 1
  • Jing-qiu Liang (梁静秋)
    • 3
  • Zhong-zhu Liang (梁中翥)
    • 3
  • Feng-li Gao (郜峰利)
    • 1
  1. 1.State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and EngineeringJilin UniversityChangchunChina
  2. 2.Semiconductor Manufacturing North China (Beijing) CorporationBeijingChina
  3. 3.Changchun Institute of Optics, Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina

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