The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 2004
Filed:
Nov. 20, 2001
Peter Brandt, Aschaffenburg, DE;
Wolfgang Siegel, Oberndorf, DE;
Siemens Aktiengesellschaft, München, DE;
Abstract
Display with a heater, a) the display having at least one display glass, b) the heater having an electrically operated heating element connected to a voltage supply (UB, GND), c) the heating element comprising a thin layer, d) the layer being made of a material forming an electrical resistance, and e) the layer being applied over a surface area to the at least one display glass or being embedded over a surface area in the display. f) A first measuring instrument ( ) is provided, which determines the resistance value of the heating element, g) a second measuring instrument ( ) is provided, which determines the level of the voltage present at the heating element, h) a third measuring instrument ( ) is provided, which senses the current ambient temperature at the display, i) a memory ( ) is provided, which stores the determined resistance value of the heating element, j) a logic unit ( ) is provided, which determines for the stored resistance value in accordance with the determined voltage and the determined ambient temperature a current-supplying period for the heating element necessary to produce that heat output which will heat up the display to a certain operating temperature within a predetermined time, and k) a switching element ( ) actuated by the logic unit ( ) is provided, which regulates the current flow through the heating element connected to the voltage supply (UB, GND) for the current-supplying period determined.