Apparatus and method for reducing perceived color shift
AssigneeQUALCOMM MEMS Technologies, Inc.
InventorsBrian J. Gally, Manish Kothari
Life of this patent
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Abstract
An apparatus and method for reducing perceived color shift as a function of viewing angle is disclosed. One embodiment is a display device that includes a color light modulator and a color filter. The filter is configured to filter wavelengths of light that would be perceived as color shifted light when reflected by the modulator at an off-axis viewing angle. Another embodiment includes a color light modulator and a color light source configured to provide light having a spectral content that lacks the wavelengths that would be perceived as color shifted light by a view of the display at an off-axis viewing angle. Another embodiment are methods of making such display devices.
Claims47
1-15. (canceled)
A display device comprising:
- at least one light-modulating element configured to selectively reflect ambient light, the light-modulating element including an optical resonant cavity associated with a first spectral response having a first spectral peak;
- and
- a filter configured to selectively transmit certain visible wavelengths and to substantially filter other visible wavelengths when illuminated with white light, the filter positioned to filter light modulated by the light-modulating element, the filter having a second spectral response associated with the selectively transmitted visible wavelengths, the second spectral response having a second spectral peak,
- wherein the second spectral response in the vicinity of the second spectral peak substantially overlaps the first spectral response in the vicinity of the first spectral peak.
A display device comprising:
- means for modulating incident light configured to selectively reflect ambient light, the light-modulating means including an optical resonant cavity associated with a first spectral response having a first spectral peak;
- and
- means for selectively transmitting certain visible wavelengths and substantially filtering other visible wavelengths when illuminated with white light, the means for selectively transmitting positioned to filter light modulated by the light-modulating means, the means for selectively transmitting having a second spectral response associated with the selectively transmitted visible wavelengths, the second spectral response having a second spectral peak,
- wherein the second spectral response in the vicinity of the second spectral peak substantially overlaps the first spectral response in the vicinity of the first spectral peak.
A method of fabricating a display device, the method comprising:
- forming at least one light-modulating element configured to selectively reflect ambient light, the light-modulating element including an optical resonant cavity associated with a first spectral response having a first spectral peak;
- and
- positioning a filter configured to selectively transmit certain visible wavelengths and to substantially filter other visible wavelengths when illuminated with white light, the filter positioned to filter light modulated by the light-modulating element, the filter having a second spectral response associated with the selectively transmitted visible wavelengths, the second spectral response having a second spectral peak,
- wherein the second spectral response in the vicinity of the second spectral peak substantially overlaps the first spectral response in the vicinity of the first spectral peak.
Dependencies are inferred from the claim text.