Light absorbers and methods
First Claim
Patent Images
1. A light absorbing, anti-reflecting filter comprising:
- a total reflective layer;
a dielectric layer formed on the total reflective layer;
a partially reflective layer formed on the dielectric layer;
a first compensator layer formed on the first partially reflective layer; and
a second compensator layer formed on the first compensator layer;
wherein the first and second compensator layers have different indicies of refraction.
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Accused Products
Abstract
For one embodiment, a reflection is reduced to substantially zero regardless of a wavelength of incident light that produced the reflection.
43 Citations
53 Claims
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1. A light absorbing, anti-reflecting filter comprising:
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a total reflective layer;
a dielectric layer formed on the total reflective layer;
a partially reflective layer formed on the dielectric layer;
a first compensator layer formed on the first partially reflective layer; and
a second compensator layer formed on the first compensator layer;
wherein the first and second compensator layers have different indicies of refraction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A micro-display comprising:
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one or more total reflectors separated from a partially reflective layer by a selectively adjustable gap;
a first compensator layer overlying the partially reflective layer; and
a second compensator layer overlying the first compensator layer, and having a greater index of refraction than the first compensator layer;
wherein when the gap is adjusted to produce an OFF or light absorbing state of the micro-display, the first and second compensator layers cause a reflectance of the micro-display to be substantially independent of wavelength of light incident on the micro-display. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A micro-display comprising:
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a plurality of total reflectors;
a plurality of stacks, each stack separated from a respective one of the total reflectors by a selectively adjustable gap, each of the stacks comprising;
a partially reflective layer overlying one of the adjustable gaps;
a first compensator layer overlying the partially reflective layer; and
a second compensator layer overlying the first dielectric layer, and having a greater index of refraction than the first compensator layer;
wherein when that adjustable gap is adjusted to produce an OFF state of the micro-display, the first and second compensators layers cause a reflectance of the micro-display to be substantially independent of wavelength of light incident on the micro-display;
a transparent stiffening layer having a first portion overlying the second compensator layer; and
a light absorbing, anti-reflective filter overlying a second portion of the transparent stiffening layer that is located between adjacent stacks. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A fabrication method comprising:
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forming a first compensator layer on a partially reflective layer; and
forming second compensator layer on the first compensator layer;
wherein forming the first and second compensator layers comprises adjusting a thickness of the first compensator layer or the thickness of the second compensator layer or both if a thickness of the partially reflective layer is determined to be in error. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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41. A method of operating a micro-display, comprising:
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reflecting incident light off a total reflector;
passing the reflected light through a dielectric material;
passing the reflected light through a partially reflecting layer to reduce an intensity of the reflected light to a first intensity; and
passing the light at the first intensity through a compensator to reduce the first intensity to a second intensity that is substantially zero regardless of a wavelength of the incident light. - View Dependent Claims (42, 43, 44, 45)
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46. A micro-display comprising:
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a means for reducing an intensity of incident light to a first intensity; and
a means for reducing the first intensity to a second intensity that is substantially zero irrespective of a wavelength of the incident light. - View Dependent Claims (47)
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48. A micro-display comprising:
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a plurality of pixels;
a light absorbing, anti-reflective filter overlying the plurality of pixels, the light absorbing, anti-reflective filter comprising;
a total reflective layer;
a dielectric layer formed on the total reflective layer;
a partially reflective layer formed on the dielectric layer;
a first compensator layer formed on the first partially reflective layer; and
a second compensator layer formed on the first compensator layer;
wherein the first and second compensator layers have different indicies of refraction. - View Dependent Claims (49, 50, 51, 52, 53)
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Specification