White light emitting diodes
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsYuan-Hao Jin, Qun-Qing Li, Shou-Shan Fan
Life of this patent
Estimating the term…
Abstract
A white LED includes a red light emitting unit, a green light emitting unit, a blue light emitting unit, and an optical grating located on a same plane. The red light emitting unit, the green light emitting unit and the blue light emitting unit are located around the optical grating. Each light emitting unit includes a first semiconductor layer, an active layer, a second semiconductor layer and a first reflector layer stacked in that order. The optical grating includes a first semiconductor layer, an active layer, and a second semiconductor layer stacked in that order. The first semiconductor layer of the optical grating and the first semiconductor layers of the light emitting units are a continuous integrated structure.
Claims19
A white light emitting diode, comprising:
- a red light emitting unit, a green light emitting unit, a blue light emitting unit, and an optical grating which are located on a same plane;
- and the red light emitting unit, the green light emitting unit, and the blue light emitting unit are located around the optical grating;
- each of the red light emitting unit, the green light emitting unit, and the blue light emitting unit comprises a first semiconductor layer, an first active layer, a second semiconductor layer, a first reflector layer, a first electrode, and a second electrode;
- the first semiconductor layer, the first active layer, the second semiconductor layer and the first reflector layer are stacked in that order;
- the first electrode is electrically connected with the first semiconductor layer;
- and the second electrode is electrically connected with the second semiconductor layer;
- the optical grating comprises a third semiconductor layer, a second active layer, a fourth semiconductor layer stacked in that order;
- wherein, the third semiconductor layer and the first semiconductor layers of the red light emitting unit, the green light emitting unit, and the blue light emitting unit are a continuous integrated structure.
Dependencies are inferred from the claim text.