Patent · US Expired

Liquid crystal display with heater

US6678033B1 · kind B1 · utility

3Cited by

9References

29Claims

0Family size

Assignee

Mannesmann VDO AG · DE

Inventors

Peter Brandt · Berghausen, DE
Dietmar Tippl · Kelkheim, DE

Key dates

Filing date	Mar 9, 2000
Grant date	Jan 13, 2004
Priority date	—
Expiry date	Mar 9, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG02F2203/09
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A display device, in particular for a vehicle, having a screen which has a liquid crystal cell, with the liquid crystal cell having a front and a rear cell wall and a liquid crystal substance arranged in the cell space between these cell walls, and having a heating apparatus by which the display device can be heated. In order to ensure reliable operation of the display device even at low temperatures, the heating apparatus is arranged in the cell space of the liquid crystal cell directly or indirectly on the front and/or, on the rear cell wall, and that the heating apparatus is operated with a pure AC voltage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.