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. 25, 2011
Filed:
Jun. 27, 2007
Pak Hong NG, Kowloon, HK;
Shou Lung Chen, Shatin, HK;
Chen Jung Tsai, Hsinchu, TW;
Hong Kong Applied Science and Technology Research Institute Company Limited, New Territories, HK;
Abstract
Methods and apparatuses for backlight calibration are described. The apparatuscomprises a backlight unitcomprising a plurality of light sources, at least one photo-sensoradapted to measure the light emitted by the backlight unit, a photo-sensor controllercoupled to the photo-sensorfor controlling the photo-sensor(s), a backlight driving circuitcoupled to the light sourcesfor providing individual driving on each light source, a signal generatorcoupled to the photo-sensor controllerand the backlight driving circuitfor controlling the operation timing of photo-sensorsand each of the light sourcesuch that lighting conditions from each of the light source can be acquired, and a processing unitcoupled to the photo-sensorand the backlight driving circuitfor analyzing the measurement data from the photo-sensorsand providing an adjustment signal to the backlight driving circuitto achieve uniform lighting conditions of the backlight unit. Also described is a method comprising the steps of providing saved settings for backlight driver, providing a modified timing sequence to backlight driver and photo sensor, measuring light conditions of each individual light source or each individual group of light sources in backlight unit, comparing measurement data with predefined light conditions, calculating the adjustment required on backlight drivel to achieve desired light conditions, and saving calculated adjustment as new settings for backlight driver