| Patent application number | Description | Published |
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| 20100258419 | LIGHT GUIDE FILM WITH CUT LINES - A light guide for an optical keypad is described. The light guide includes a light interface surface, top and bottom surfaces, a surface feature pattern, and a cut line. The light interface surface receives light into the light guide from a light source. The light received through the light interface surface reflects according to total internal reflection (TIR) within the light guide between portions of the top and bottom surfaces. The surface feature pattern disrupts the TIR and scatters at least some of the light outside of at least one surface of the top and bottom surfaces. The cut line redirects at least some of the light from a first direction to a second direction within the light guide. The first direction is a direction other than towards the surface feature pattern, while the second direction is a direction substantially towards the surface feature pattern. | 10-14-2010 |
| 20100271839 | LIGHT GUIDE DISPLAY WITH MULITPLE LIGHT GUIDE LAYERS - A light guide display includes a printed overlay layer, a first light guide layer, and a second light guide layer. The printed overlay layer includes an input region with a symbol that is at least partially translucent. The first light guide layer is disposed on a back side of the printed overlay layer to illuminate the symbol of the printed overlay layer in response to illumination of the first light guide layer. The second light guide layer is disposed on a front side of the printed overlay layer, opposite the first light guide layer. The second light guide layer includes a separate symbol that is distinct from the symbol of the printed overlay layer. The second light guide layer illuminates the separate symbol of the second light guide layer in response to illumination of the second light guide layer. | 10-28-2010 |
| 20100288608 | ILLUMINATED KEYPAD - An illuminated keypad is disclosed herein. And embodiment of the keypad comprises a first zone and a second zone; a substrate comprising a substrate surface; a first switch located on the substrate in the first zone; a first light guide having a first light guide first side and a first light guide second side, wherein the first light guide first side faces the first switch; a second light guide having a second light guide first side and a second light guide second side, wherein the second light guide first side faces the substrate surface; a masking layer having a masking layer first side and a masking layer second side, the masking layer first side facing the substrate surface; and at least one cut in the masking layer, wherein the masking layer blocks a light path between the light guides. | 11-18-2010 |
| 20110083951 | FITTING A LIGHT GUIDE SHEET TO A KEYPAD USING PROTRUSIONS - In an embodiment, the invention provides a keypad assembly comprising a keypad, a light guide sheet, a dome sheet, and a board. The keypad comprises at least one protrusion and at least one rib. The light guide sheet has openings that are smaller than a first portion of the at least one protrusion. The dome sheet and the board have openings that are larger than a first portion of the at least one protrusion. The at least one protrusion is compressible such that the first portion of the at least one protrusion is extendable through the openings in the light guide sheet, the dome sheet and the board. The at least one rib physically contacts at least a portion of the light guide sheet. | 04-14-2011 |
| Patent application number | Description | Published |
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| 20090129049 | Segmented Light Guide - An exemplary embodiment of a segmented light guide includes a light channeling layer having at least one slit dividing the light channeling layer into a plurality of segments, and at least one LED associated with the light channeling layer. The slit substantially prevents light from migrating in the segmented light guide between adjacent segments that are divided by the slit. | 05-21-2009 |
| 20090310355 | Segmented Light Guide - An exemplary embodiment of a segmented light guide includes a light channeling layer having a plurality of regions, with multiple slits in the light channeling layer dividing neighboring regions. The segmented light guide also includes at least one light source associated with the light channeling layer. | 12-17-2009 |
| 20100232098 | KEYPAD DEVICE WITH LIGHT SOURCE AND REFLECTOR - A device is disclosed having a keypad and an adjacent light guide with at least one light source. At least one reflector is provided, having at least an area thereof adjacent to the light source. At least a portion of the reflector is located either between the light source and the keypad or between the light guide and the keypad. | 09-16-2010 |
| 20110079497 | KEYPAD ILLUMINATION APPARATUS - A keypad illumination apparatus having a key plate member, a flexible light guide film, a reflective layer, a plurality of metal domes, a light source and a substrate. The key plate member may have a plurality of keys formed thereon. The flexible light guide film is configured to transmit light from the light source and has a plurality of plunging structures and apertures to accommodate the plurality of metal domes, which may be configured to actuate a plurality of electrical switches on the substrate. | 04-07-2011 |
