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, a 6.6 × 5 mm 2 large 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.
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Wang et al. (2015) studied this question.
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