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:
Oct. 21, 2003
Filed:
Aug. 23, 2001
Other;
Abstract
A liquid crystal display device includes a liquid crystal display panel and a lighting device. The lighting device is supplied with alternately a first current during a period t and a second current during a second period t such that electric power E is lower than electric power E . E is defined as (t ×i (1)×V (1))/2+(t ×i (2)×V (2))/2, where i (1)=a peak-to-peak value of the first current, V (1)=a peak-to-peak value of a voltage across the light source during the period t1, i (2)=a peak-to-peak value of the second current, and V (2)=a peak-to-peak value of a voltage across the light source during the period t . E is defined as (t +t )×I ×V , where I and V are effective values of the current and voltage of the light source, respectively.