Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2011-01-18
2011-01-18
Patel, Ashok (Department: 2889)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S112000
Reexamination Certificate
active
07872409
ABSTRACT:
A white light LED is disclosed. The white light LED includes a dual-wavelength chip and an optical thin film. The dual-wavelength chip generates a first wavelength light and a second wavelength light. The optical thin film is disposed above the dual-wavelength chip. The optical thin film can partially be a quantum well thin film. Therefore, the quantum well thin film can be excited by the first wavelength light and/or second wavelength light to generate a third wavelength light. The optical thin film further comprises a plurality of windows to let the first and second wavelength lights pass through. By predetermining a ratio of the quantum well thin film area and the window area that belong to the optical thin film, a lumen ratio of the first, the second, and the third wavelength lights can be adjusted to realize white lights of different color temperatures.
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Light-emitting Devices Based on InGaN/GaN Nano-structures, Horng-Shyang Chen, Jul. 2006.
Chi Wu-sheng
Wang Chih-Lin
AU Optronics Corp.
Kirton & McConkie
Patel Ashok
Witt Evan R.
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