Dielectric enhanced mirror for IMOD display
First Claim
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1. A display device comprising:
- a partially transparent and partially reflective layer;
a first dielectric layer having a first thickness and a first index of refraction characteristic;
a second dielectric layer having a second thickness and a second index of refraction characteristic, wherein an optical path length of the first dielectric layer through the first thickness is about the same as an optical path length of the second dielectric layer through the second thickness, and wherein the first index of refraction characteristic is greater than the second index of refraction characteristic;
a reflective layer, wherein the second dielectric layer is disposed between the reflective layer and the first dielectric layer; and
an optically resonant cavity defined between the partially transparent and partially reflective layer and the reflective layer.
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Abstract
This disclosure provides systems, methods, and apparatus for display device including a dielectric stack positioned between a first electrically conductive layer and a second movable electrically conductive layer. In one aspect, the dielectric stack includes alternating dielectric layers of high and low indices of refraction. By controlling the refractive indices and thicknesses of layers within the dielectric stack, the display device'"'"'s states of light reflection may be reversed, such that light is reflected when the movable layer is positioned in proximity to the first electrically conductive layer.
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Citations
24 Claims
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1. A display device comprising:
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a partially transparent and partially reflective layer; a first dielectric layer having a first thickness and a first index of refraction characteristic; a second dielectric layer having a second thickness and a second index of refraction characteristic, wherein an optical path length of the first dielectric layer through the first thickness is about the same as an optical path length of the second dielectric layer through the second thickness, and wherein the first index of refraction characteristic is greater than the second index of refraction characteristic; a reflective layer, wherein the second dielectric layer is disposed between the reflective layer and the first dielectric layer; and an optically resonant cavity defined between the partially transparent and partially reflective layer and the reflective layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A display device comprising:
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means for partially reflecting and partially transmitting light; first dielectric means having a first thickness and a first index of refraction characteristic; second dielectric means having a second thickness and a second index of refraction characteristic, wherein an optical path length of the first dielectric means through the first thickness is about the same as an optical path length of the second dielectric means through the second thickness, wherein the first index of refraction characteristic is greater than the second index of refraction characteristic, wherein the first dielectric means is disposed between the partially reflective and partially transmissive means and the second dielectric means; means for reflecting light, wherein the second dielectric means is disposed between the reflective means and the first dielectric means; and optically resonant means defined between the partially reflective and partially transmissive means and the reflective means. - View Dependent Claims (18, 19, 20)
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21. A method of manufacturing a display device, the method comprising:
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providing a substrate; forming a partially reflective and partially transmissive layer on the substrate; forming a sacrificial layer on the partially transparent and partially reflective layer; forming a first dielectric layer on the sacrificial layer, the first dielectric layer having a first thickness and a first index of refraction characteristic; forming a second dielectric layer on the first dielectric layer, the second dielectric layer having a second thickness and a second index of refraction characteristic, wherein an optical path length of the first dielectric layer through the first thickness is about the same as an optical path length of the second dielectric layer through the second thickness, wherein the first index of refraction characteristic is greater than the second index of refraction characteristic; forming a reflective layer on the second dielectric layer; and removing the sacrificial layer. - View Dependent Claims (22, 23, 24)
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Specification