Avoiding optical effects of touch on liquid crystal display
First Claim
1. A user interface device, comprising:
- a body comprising a support surface;
a light source disposed within the body;
a liquid crystal display configured to receive and dynamically modulate light produced by the light source to create an image displayable on one or more display surfaces coupled with the body;
a support sheet joined to a light exit surface of the liquid crystal display, the support sheet comprising a perimeter region that extends beyond an outer edge of the liquid crystal display and over the support surface of the body; and
a light delivery system positioned optically between the light source and the liquid crystal display to deliver light produced by the light source to the liquid crystal display, the light delivery system comprising a light exit surface spaced from the liquid crystal display to form a gap positioned between the light exit surface of the light delivery system and a light input surface of the liquid crystal display, wherein the liquid crystal display is positioned between the support sheet and the light delivery system.
2 Assignments
0 Petitions
Accused Products
Abstract
Embodiments are disclosed herein related to the avoidance of undesirable optical effects in a liquid crystal display used with a touch-sensitive display input device. For example, one embodiment provides a user interface comprising a body, a light source disposed within the body, and a liquid crystal display configured to create an image displayable on one or more display surfaces coupled to the body. The user interface device further includes a light delivery system positioned optically between the light source and the liquid crystal display to deliver light produced by the light source to the liquid crystal display. The light delivery system comprises a light exit surface spaced from the liquid crystal display to form a gap positioned between the light exit surface of the light delivery system and the liquid crystal display.
84 Citations
17 Claims
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1. A user interface device, comprising:
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a body comprising a support surface; a light source disposed within the body; a liquid crystal display configured to receive and dynamically modulate light produced by the light source to create an image displayable on one or more display surfaces coupled with the body; a support sheet joined to a light exit surface of the liquid crystal display, the support sheet comprising a perimeter region that extends beyond an outer edge of the liquid crystal display and over the support surface of the body; and a light delivery system positioned optically between the light source and the liquid crystal display to deliver light produced by the light source to the liquid crystal display, the light delivery system comprising a light exit surface spaced from the liquid crystal display to form a gap positioned between the light exit surface of the light delivery system and a light input surface of the liquid crystal display, wherein the liquid crystal display is positioned between the support sheet and the light delivery system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A user interface device, comprising:
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a body; a keypad comprising a plurality of actuatable keys; a light source; a liquid crystal display configured to receive and dynamically modulate light produced by the light source to create a plurality of display images that are respectively projected onto the plurality of actuatable keys; and an optical waveguide positioned optically between the light source and the liquid crystal display to deliver light produced by the light source to the liquid crystal display, the optical waveguide comprising a light exit surface spaced from the liquid crystal display to form a gap positioned between the light exit surface of the optical waveguide and a light input surface of the liquid crystal display; and a support sheet joined to a light exit surface of the liquid crystal display, the support sheet comprising one or more graded index lenses and a perimeter region that interfaces with the body to space the liquid crystal display from the optical waveguide. - View Dependent Claims (12, 13, 14, 15)
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16. A user interface device, comprising:
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a body comprising an opening with a seal-supporting surface; a seal disposed on the seal-supporting surface; a keypad disposed within the opening of the body and comprising a plurality of actuatable keys; a light source disposed within the body; a liquid crystal display configured to receive and dynamically modulate light produced by the light source to create a plurality of display images that are respectively projected onto the plurality of actuatable keys; a support sheet joined to a light exit surface of the liquid crystal display, the support sheet comprising an optical coating that comprises one or more of a hot minor and an anti-reflective coating and a perimeter region that extends beyond an outer edge of the liquid crystal display and that contacts the seal; and an optical waveguide positioned optically between the light source and the liquid crystal display to deliver light produced by the light source to the liquid crystal display, the optical waveguide comprising a light exit surface spaced from the liquid crystal display to form a gap positioned between the light exit surface of the optical waveguide and a light input surface of the liquid crystal display. - View Dependent Claims (17)
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Specification