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:
Jun. 11, 2002
Filed:
Jul. 05, 2000
Motorola Inc., Schaumburg, IL (US);
Abstract
A method for controlling an emission current ( ) in a field emission display ( ) includes measuring an emission current ( ), measuring a portion of the plurality of pixels receiving emission current ( ) as a percentage of the plurality of pixels on the anode ( ) to define a set point, comparing measured value to set point value and adjusting gate voltage to cause emission current to approach set point value. A field emission display ( ) includes a control circuit ( ), which has an analog-to-digital converter ( ), a current controller ( ), as display timing controller ( ) and a gate voltage source ( ). Analog-to-digital converter ( ) is designed to be connected to power supply ( ). Gate voltage source ( ) is connected to gate extraction electrode ( ) and applies thereto the offset voltage, which is manipulated by current controller ( ) in response to an output signal ( ) of analog-to-digital converter ( ) and an output signal of display timing controller ( ).