Wavelength converting system
AssigneeEpistar Corporation
InventorsChien-Yuan Wang, Min-Hsun Hsieh, Chih-Chiang Lu
Life of this patent
Estimating the term…
Abstract
An embodiment of the invention discloses a wavelength converting system capable of emitting a second electromagnetic radiation having a second wavelength in response to a first electromagnetic radiation having a first wavelength, wherein an energy level of the first electromagnetic radiation is higher than that of the second electromagnetic level, and a positive correlation is between the first wavelength and the second wavelength.
Claims22
A wavelength converting system comprising:
- a wavelength converter, responsive to an illumination by a first electromagnetic radiation having a first wavelength, and providing a second electromagnetic radiation having a second wavelength in a positive correlation to the first wavelength, wherein the first electromagnetic radiation having a higher energy level than the second electromagnetic radiation.
A wavelength converting system comprising:
- a first excitation wavelength emitted from a first light emitter;
- a first emission wavelength greater than the first excitation wavelength;
- a second excitation wavelength emitted from a second light emitter;
- and
- a second emission wavelength greater than the second excitation wavelength;
- wherein each of the first excitation wavelength, the first emission wavelength, the second excitation wavelength, and the second emission wavelength has chromaticity coordinates locating on a perimeter of a CIE chromaticity diagram, and a first line connects the first excitation wavelength and the first emission wavelength, a second line connects the second excitation wavelength and the second emission wavelength wherein the first line and the second line intersects in a region of the CIE chromaticity diagram.
A wavelength converting system comprising:
- a radiation source;
- a first fluorescent material capable of being excited by the radiation source in a wavelength spectrum having a short wavelength and a long wavelength;
- and
- a second fluorescent material capable of being excited by the radiation source in the wavelength spectrum;
- wherein the first fluorescent material has a higher excitation efficiency than the second fluorescent material when being excited by the short wavelength, and a lower excitation efficiency than the second fluorescent material when being excited by the long wavelength.
A wavelength converting system comprising:
- at least two of the light sources having a wavelength difference not less than 1 nm and not greater than 20 nm;
- and
- a wavelength converter on light paths of the at least two light sources and capable of being excited by one of the at least two light sources to provide a first mixed light having a first color temperature and by another one to provide a second mixed light having a second color temperature,
- wherein a difference between the first and second color temperatures is not greater than 100K.
A wavelength converting system comprising:
- a light-emitting semiconductor structure comprising an electron provider, a hole provider, a light-emitting layer between the electron provider and the hole provider, and a light extraction interface;
- and
- a wavelength converter on the light extraction interface and providing an output light in response to an excitation of an input light;
- wherein a positive correlation is between the input light and the output light.
A wavelength converting system comprising:
- a light-emitting source freely selected from any one of applicable light-emitting diode units on a wafer wherein the light emitting source comprising a light extraction interface;
- and
- a wavelength converter on the light extraction interface and providing an output light in response to an input light;
- wherein a mixed color light is generated by the presence of the input light and the output light.
Dependencies are inferred from the claim text.