Method and device for compensating for color shift as a function of angle of view
First Claim
Patent Images
1. A display comprising:
- at least one interferometric modulator configured to reflect incident light, the at least one interferometric modulator having an optical response that depends at least in part on angle of view and wavelength of the incident light; and
a diffuser positioned in an optical path to the at least one interferometric modulator, the diffuser having an optical response that is substantially matched to the optical response of the interferometric modulator to maintain substantially the same composition of color at different angles of view.
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Abstract
In one embodiment of the invention, a display is provided and includes a plurality of interferometric display elements. The display further includes at least one diffuser. Optical properties of the diffuser are selected to reduce color shift of the display when viewed from at least one angle.
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Citations
43 Claims
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1. A display comprising:
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at least one interferometric modulator configured to reflect incident light, the at least one interferometric modulator having an optical response that depends at least in part on angle of view and wavelength of the incident light; and
a diffuser positioned in an optical path to the at least one interferometric modulator, the diffuser having an optical response that is substantially matched to the optical response of the interferometric modulator to maintain substantially the same composition of color at different angles of view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A display comprising:
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at least one interferometric modulator having a spectral responsivity that varies with angle of view, θ
, such that color varies with angle of view; and
a non-lambertian diffuser positioned in an optical path to the at least one interferometric modulator, the non-lambertian diffuser having an optical response that varies with angle of view, said diffuser substantially reducing variation of color with angle of view. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of fabricating a display comprising:
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selecting a diffuser having an optical response; and
disposing the diffuser in front of an interferometric modulator array, the interferometric modulator array having an optical response that depends on angle of view, wherein selecting the diffuser comprises substantially matching the optical response of the diffuser and the optical response of the interferometric modulator array to reduce angular color shift with angle-of-view of the display. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A method of tailoring optical properties of a display comprising an interferometric modulator having a spectral responsivity and a diffuser having an optical response, the method comprising:
selecting at least one property of the diffuser with reference to the spectral responsivity of the interferometric modulator so as to reduce color shift of the display. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A display system for producing an image, the system comprising:
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at least one interferometric modulator having a spectral responsivity that depends at least in part on angle of view of the display; and
a diffuser positioned in at least one optical path through the at least one interferometric modulator, wherein the interferometric modulator is configured to at least partially encrypt the image from view and wherein the diffuser is configured to decrypt the image. - View Dependent Claims (41)
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42. A method of limiting view of a display to authorized viewers, the method comprising:
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selecting at least one interferometric modulator having a spectral responsivity that depends at least in part on angle of view of the display;
reflecting light indicative of an image from the at least one interferometric modulator, the interferometric modulator being configured to at least partially obscure the image from view; and
diffusing the reflected light from the at least one interferometric modulator with a diffuser having an optical response, wherein the optical response of the diffuser is configured to so as to decrypt the image. - View Dependent Claims (43)
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Specification