Display device and photomask therefor
AssigneeEnvisics Ltd
InventorsAlexander Cole, Neil Collings
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Abstract
A display device, a photomask for a display device and a method for fabricating a display device comprising the photomask is described. The display device comprises a plurality of pixels arranged to spatially modulate light having a first characteristic. The display device further comprises a pixel mask structure. The pixel mask structure comprises a diffractive pattern that is configured to diffract light having the first characteristic and to transmit light having a second characteristic (without diffraction). The diffractive pattern of the pixel mask structure substantially surrounds the plurality of pixels.
Claims13
A display device configured to spatially modulate light having a first characteristic, wherein the display device comprises a Liquid Crystal on Silicon Spatial Light Modulator (LCOS SLM), and wherein the display device comprises:
- a plurality of pixels on a substrate, the plurality of pixels having a pixel area;
- and
- a pixel mask structure comprising a diffractive pattern that is configured to diffract light having the first characteristic and to transmit light having a second characteristic, wherein the pixel mask structure substantially surrounds the pixel area of the plurality of pixels to form a central aperture for light which does not contain a diffractive pattern, and wherein the first characteristic is a first wavelength or range of wavelengths of light and the second characteristic is a second wavelength or range of wavelengths of light.
A method of fabricating a display device comprising:
- forming a display device comprising a plurality of pixels on a substrate, wherein the display device is arranged to spatially modulate light having a first characteristic, and wherein the display device comprises a Liquid Crystal on Silicon Spatial Light Modulator (LCOS SLM);
- forming a photomask on a plane parallel to a first major surface of the display device, wherein the photomask has a pixel mask structure comprising a diffractive pattern that is configured to diffract light having the first characteristic and to transmit light having a second characteristic, wherein the pixel mask structure substantially surrounds the plurality of pixels of the display device to form a central aperture for light which does not contain a diffractive pattern, wherein the first characteristic is a first wavelength or range of wavelengths of light and the second characteristic is a second wavelength or range of wavelengths of light;
- and
- treating the display device, wherein treating the display device comprises exposing the first major surface of the display device to light having the second characteristic.
Dependencies are inferred from the claim text.