Color control by alteration of wavelenght converting element
First Claim
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1. A method for fabricating a light emitting diode (LED) device comprising:
- providing an LED die on a support substrate;
providing an optical element affixed over the LED die;
depositing a wavelength converting material as a layer over the optical element;
energizing the LED die after depositing the wavelength converting material as a layer over the optical element;
optically testing a light emission from the LED die and wavelength converting material;
comparing the light emission to a desired light emission; and
after comparing the light emission to a desired light emission, depositing additional wavelength converting material over the optical element if such additional wavelength converting material is needed to achieve the desired light emission.
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Abstract
A light emitting device is produced by depositing a layer of wavelength converting material over the light emitting device, testing the device to determine the wavelength spectrum produced and correcting the wavelength converting member to produce the desired wavelength spectrum. The wavelength converting member may be corrected by reducing or increasing the amount of wavelength converting material. In one embodiment, the amount of wavelength converting material in the wavelength converting member is reduced, e.g., through laser ablation or etching, to produce the desired wavelength spectrum.
62 Citations
13 Claims
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1. A method for fabricating a light emitting diode (LED) device comprising:
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providing an LED die on a support substrate; providing an optical element affixed over the LED die; depositing a wavelength converting material as a layer over the optical element; energizing the LED die after depositing the wavelength converting material as a layer over the optical element; optically testing a light emission from the LED die and wavelength converting material; comparing the light emission to a desired light emission; and after comparing the light emission to a desired light emission, depositing additional wavelength converting material over the optical element if such additional wavelength converting material is needed to achieve the desired light emission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification