Liquid crystal display temperature measuring in adhesion material
AssigneeTelefonaktiebolaget LM Ericsson
InventorSturla Lutnaes
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Abstract
The present invention discloses an liquid crystal display (LCD) device comprising temperature measuring means. An adhesion material (5), situated either between the top (2) and bottom (3) sheets of the LCD (1) itself or between the LCD and a covering sheet, such as a printed circuit board or a touch screen, having a temperature dependent electrical property, is used as the temperature probe. The electrical property is preferably the electrical conductivity and the adhesion material (5) preferably encircles substantially the active area (4) of the LCD (1). Manufacturing and operational methods for such devices are also disclosed.
Claims57
A liquid crystal display (LCD) device comprising a top sheet, a bottom sheet adhered to said top sheet by adhesion material, liquid crystals disposed between said top sheet and said bottom sheet, and means for temperature sensing, said means for temperature sensing including at least a part of said adhesion material, having a temperature dependent electrical property.
A liquid crystal display (LCD) device, comprising a liquid crystal display (LCD) in turn comprising a volume of liquid crystals, and a covering sheet adhered to said LCD by adhesion material and means for temperature sensing, said means for temperature sensing includes at least a part of said adhesion material, having a temperature dependent electrical property.
A portable electronic device, comprising a liquid crystal display (LCD), which in turn comprises a top sheet, a bottom sheet adhered to said top sheet by adhesion material, liquid crystals disposed between said top sheet and said bottom sheet, and means for temperature sensing, said means for temperature sensing includes at least a part of said adhesion material, having a temperature dependent electrical property.
A portable electronic device, comprising a liquid crystal display (LCD), which in turn comprises a volume of liquid crystals, and a covering sheet adhered to said LCD by adhesion material, and means for temperature sensing, said means for temperature sensing includes at least a part of said adhesion material, having a temperature dependent electrical property.
A method for manufacturing of a liquid crystal display (LCD) comprising the step of connecting a top sheet and a bottom sheet to enclose liquid crystals, said connecting step comprises adhesion of said top sheet to said bottom sheet by adhesion material, whereby at least a part of said adhesion material, having a temperature dependent electrical property, is arranged included in a temperature sensing means.
A method for manufacturing of a liquid crystal display (LCD) unit comprising the step of connecting a liquid crystal display (LCD) to a covering sheet, said connecting step comprises adhesion of LCD to said covering sheet by adhesion material whereby at least a part of said adhesion material, having a temperature dependent electrical property, is arranged included in a temperature sensing means.
A temperature measurement method for a liquid crystal display (LCD) unit, comprising the steps of:
- measuring a value of a temperature dependent electrical property of at least a part of an adhesion layer in said LCD unit;
- and
- correlating said measured value to a temperature associated with said LCD unit.
A control method for controlling a liquid crystal display (LCD) unit, comprising the steps of:
- measuring a value of a temperature dependent electrical property of at least a part of an adhesion layer in said LCD unit;
- correlating said measured value to a temperature associated with said LCD unit, and
- controlling operation conditions for said LCD unit in response to said temperature.
Dependencies are inferred from the claim text.