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US 8,013,949 B2Granted
Liquid crystal display device with optoelectronic component and method for controlling backlighting of such a display device
AssigneeContinental Automotive GmbH
InventorsKlaus Class-Dieter, Robert Eckmüller, Johannes Kraus
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Abstract
An LC display is disclosed that comprises a light source (5) that provides the background illumination, that emits light of only a part of the spectrum and that is disposed on the back (9) of the liquid crystal layer (10) so as to be protected and covered while it still is able to detect or emit light through the liquid crystal layer (10). The detected light is evaluated to control the background illumination and the inventive device enables data communication with an external device.
Claims11
A liquid crystal display comprising:
- front and back glass substrates having a liquid crystal layer sealed therebetween,
- a light guide positioned behind the back glass substrate and running substantially the entire length of said substrate,
- a reflector positioned behind the light guide and running the entire length of the light guide, said reflector reflecting light through said liquid crystal layer in a first direction;
- a light source located adjacent to a first side of the light guide not underneath the back substrate, said light source emitting light in a second direction perpendicular to said first direction, and
- an optoelectric component located adjacent to a second side of the light guide, said component located directly underneath the back glass substrate and not in contact with the back substrate, said optoelectric component detecting light emitted in a direction perpendicular to said first direction,
- wherein the light source emits only part of the spectrum, and the optoelectronic component is aligned to that spectrum that is not emitted by the light source.
3 more elements
Dependencies are inferred from the claim text.