EXTENDED PERSISTENCE AND REDUCED FLICKER LIGHT SOURCES
First Claim
1. An illumination module for providing reduced flicker illumination, the illumination module comprising:
- an illumination source for converting electrical energy into emitted light, wherein the emitted light has a first percent flicker; and
a light capacitive filter for filtering the light emitted by the illumination source to produce the reduced flicker illumination provided by the illumination module,wherein the reduced flicker illumination has a percent flicker that is lower than the first percent flicker.
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Accused Products
Abstract
A light source is provided with extended persistence and reduced flicker characteristics by using a light capacitive filter. In general, a light source can include an illumination source which converts electrical energy into emitted light. The illumination source, however, is generally powered by an AC waveform, and the periodic variations inherent in the AC waveform may cause flicker in the emitted light. To reduce the flicker, a light capacitive filter is included in the light source to filter the light emitted by the illumination source and produce a light output with reduced flicker. In some examples, the light capacitive filter includes a medium persistence phosphor having a decay constant (or half-life) of between 1 milliseconds and 2 seconds.
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Citations
19 Claims
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1. An illumination module for providing reduced flicker illumination, the illumination module comprising:
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an illumination source for converting electrical energy into emitted light, wherein the emitted light has a first percent flicker; and a light capacitive filter for filtering the light emitted by the illumination source to produce the reduced flicker illumination provided by the illumination module, wherein the reduced flicker illumination has a percent flicker that is lower than the first percent flicker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A light having extended persistence, the light comprising:
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an illumination source for producing light by converting electrical energy into produced light; and a light persistent filter for absorbing light produced by the illumination source and re-emitting the absorbed light during a period of time when the illumination source does not produce light, wherein the light persistent filter re-emits the absorbed light with a half-life of between 1 millisecond and 2 seconds. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification