Online backlight unit tester based on area CCD

Author

Wei, Tzu-Hsuan ; Wen, Jen-Yu ; Chiang, Wei-Chieh ; Tsai, Ruei-Hung ; Huang, Ting-Ming ; Tsay, Ho-Lin ; Liao, Tai-Shan

Author_Institution

Nat. Appl. Res. Labs., Instrum. Technol. Res. Center, Taipei

fYear

2008

fDate

9-11 April 2008

Firstpage

498

Lastpage

501

Abstract

Concept of using charge coupled device camera embedded with a calibrated image-processing algorithm as a two-dimensional luminance meter was successfully realized and verified with a small-scale backlight unit tester. This built apparatus takes only 3 seconds to get data of 10,000 points spreading uniformly in a 4-inches target, with target arbitrarily oriented. These merits make the tester more attractive and suitable for an online measurement system than other BLU testers based on area CCD.

Keywords

CCD image sensors; brightness; charge-coupled devices; image processing; liquid crystal displays; optical variables measurement; CCD; charge coupled device camera; image-processing algorithm; luminance meter; online backlight unit tester; Area measurement; Cameras; Cathode ray tubes; Charge coupled devices; Charge-coupled image sensors; Flat panel displays; Liquid crystal displays; Manufacturing; Monitoring; System testing; AOI; CCD; backlight unit;

fLanguage

English

Publisher

ieee

Conference_Titel

Smart Manufacturing Application, 2008. ICSMA 2008. International Conference on

Conference_Location

Gyeonggi-do

Print_ISBN

978-89-950038-8-6

Electronic_ISBN

978-89-962150-0-4

Type

conf

DOI

10.1109/ICSMA.2008.4505574

Filename

4505574