Display
First Claim
1. A display comprising:
- a transmissive pixellated spatial light modulator; and
a backlight;
wherein the backlight has a light-transmissive waveguide, a first face of the waveguide being opposed to the spatial light modulator;
wherein the first face of the waveguide comprises a plurality of regions that are not totally internally reflective for at least one polarisation of light propagating within the waveguide, the remainder of the first face of the waveguide being totally internally reflective for light propagating within the waveguide;
wherein the pitch of the regions is substantially an integer multiple of the pitch of the pixels of the spatial light modulator along a given direction; and
wherein the regions are configured such that substantially no light emitted from the backlight is incident on a spacing between adjacent pixels along the given direction.
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Accused Products
Abstract
A display comprises: a transmissive pixellated spatial light modulator (21); and a backlight (22). The backlight has a light-transmissive waveguide (26), with a first face of the waveguide being opposed to the spatial light modulator (21). The first face of the waveguide comprises a plurality of regions that are not totally internally reflective for at least one polarisation of light propagating within the waveguide, and the remainder of the first face of the waveguide is totally internally reflective for light propagating within the waveguide. Light is extracted from the waveguide at the regions where first face of the waveguide is not totally internally reflective. The pitch of the regions where first face of the waveguide is not totally internally reflective is substantially an integer multiple of the pitch of the pixels of the spatial light modulator.
29 Citations
55 Claims
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1. A display comprising:
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a transmissive pixellated spatial light modulator; and a backlight; wherein the backlight has a light-transmissive waveguide, a first face of the waveguide being opposed to the spatial light modulator; wherein the first face of the waveguide comprises a plurality of regions that are not totally internally reflective for at least one polarisation of light propagating within the waveguide, the remainder of the first face of the waveguide being totally internally reflective for light propagating within the waveguide; wherein the pitch of the regions is substantially an integer multiple of the pitch of the pixels of the spatial light modulator along a given direction; and wherein the regions are configured such that substantially no light emitted from the backlight is incident on a spacing between adjacent pixels along the given direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification