DISPLAY SYSTEMS INCLUDING ILLUMINATION AND OPTICAL TOUCHSCREEN
First Claim
Patent Images
1. A display device comprising:
- a light guide having a forward and a rearward surface, the light guide including a plurality of edges between the forward and the rearward surfaces and a plurality of turning features configured to direct light propagating through the light guide towards the rearward surface of the light guide;
a plurality of light modulating elements disposed rearward of the light guide;
at least one light source disposed to inject light into the light guide such that light propagates through the light guide;
one or more sensors disposed rearward of the plurality of light modulating elements;
a first light redirector portion disposed to receive light from the at least one light source and direct at least a first portion of the received light such that it propagates forward of the light guide; and
a second light redirector portion disposed to receive and direct light propagating forward of the light guide towards the one or more sensors.
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Accused Products
Abstract
This disclosure provides systems, methods and apparatus for a display device having a front light to provide front illumination to the display element included in the display device and an optical touch screen to provide a touch input to the display device. In one aspect, the display device includes a light source disposed to inject light into a backplate of the display device rearward of the display elements and a light redirector disposed to receive light from the backplate and redirect the received light forward of the display elements for optical touch purpose.
20 Citations
31 Claims
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1. A display device comprising:
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a light guide having a forward and a rearward surface, the light guide including a plurality of edges between the forward and the rearward surfaces and a plurality of turning features configured to direct light propagating through the light guide towards the rearward surface of the light guide; a plurality of light modulating elements disposed rearward of the light guide; at least one light source disposed to inject light into the light guide such that light propagates through the light guide; one or more sensors disposed rearward of the plurality of light modulating elements; a first light redirector portion disposed to receive light from the at least one light source and direct at least a first portion of the received light such that it propagates forward of the light guide; and a second light redirector portion disposed to receive and direct light propagating forward of the light guide towards the one or more sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A display device comprising:
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a first means for guiding light having a forward and a rearward surface, the light guiding means including a plurality of edges between the forward and the rearward surfaces and a plurality of means for turning light configured to direct light propagating through the light guiding means towards the rearward surface of the light guiding means; a plurality of means for modulating light disposed rearward of the light guiding means; at least one means for illumination disposed to inject light into the light guiding means such that light propagates through the light guiding means; one or more means for detecting light disposed rearward of the plurality of light modulating means; a first means for redirecting light disposed to receive light from the at least one illumination means and direct at least a first portion of the received light such that it propagates forward of the light guiding means; and a second means for redirecting light disposed to receive and direct light propagating forward of the light guiding means towards the one or more detecting means. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A method of manufacturing a display device, the method comprising:
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disposing a light guide having a forward and a rearward surface, the light guide including a plurality of edges between the forward and the rearward surfaces and a plurality of turning features configured to direct light propagating through the light guide towards the rearward surface of the light guide; disposing a plurality of light modulating elements rearward of the light guide; providing at least one light source configured to inject light into the light guide such that light propagates through the light guide; providing one or more sensors disposed rearward of the plurality of light modulating elements; disposing a first light redirector adjacent a first edge of the light guide such that light from the at least one light source is received by the first light redirector and a first portion of the received light is redirected such that it propagates forward of the light guide; and disposing a second light redirector adjacent a second edge of the light guide such that light propagating forward of the light guide is received by the second light redirector and redirected towards the one or more sensors. - View Dependent Claims (31)
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Specification