Multilayer light modulator
First Claim
1. A multilayer light modulator comprising:
- a light modulating stack operable to transform an electrical control signal into a modulated optical signal, the light modulating stack comprising;
one or more optically reflecting layers;
one or more optically transmitting layers;
one or more optically variable layers, the optically variable layers comprising a plurality of electrophoretic particles supported in a fluid contained within at least two parallel surfaces;
a bias generator coupled to the optically variable layers and responsive to the electrical control signal, wherein the bias generator creates a bias that changes the reflectance of the light modulating stack by causing the electrophoretic particles to substantially cover a first surface of the at least two parallel surfaces based on the bias and to substantially cover a second surface of the at least two parallel surfaces based on a reverse bias.
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Accused Products
Abstract
A multilayer light modulator includes, a light modulating stack operable to transform an electrical control signal into a modulated optical signal. The light modulating stack comprises one or more optically reflecting layers, optically transmitting layers, and optically variable layers. The optically variable layer comprises a plurality of electrophoretic particles supported in a fluid. The multilayer light modulator also includes a bias generator coupled to the optically variable layers. The bias generator is responsive to the electrical control signal, wherein the bias generator creates a bias that changes the reflectance of the light modulating stack by causing the electrophoretic particles to move within the fluid.
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Citations
14 Claims
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1. A multilayer light modulator comprising:
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a light modulating stack operable to transform an electrical control signal into a modulated optical signal, the light modulating stack comprising; one or more optically reflecting layers; one or more optically transmitting layers; one or more optically variable layers, the optically variable layers comprising a plurality of electrophoretic particles supported in a fluid contained within at least two parallel surfaces; a bias generator coupled to the optically variable layers and responsive to the electrical control signal, wherein the bias generator creates a bias that changes the reflectance of the light modulating stack by causing the electrophoretic particles to substantially cover a first surface of the at least two parallel surfaces based on the bias and to substantially cover a second surface of the at least two parallel surfaces based on a reverse bias. - View Dependent Claims (2, 3)
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4. A device comprising:
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a first layer having a first index of refraction; a second layer having a second index of refraction; a fluid having a third index of refraction enclosed between the first layer and the second layer; a plurality of electrically charged particles having a fourth index of refraction suspended in the fluid; and a variable voltage source coupled to the first and second layer and operable to cause the plurality of particles to move within the fluid. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification