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. 05, 2012
Filed:
Sep. 28, 2010
Sang-jin Pak, Yongin-si, KR;
Kee-han Uh, Yongin-si, KR;
Ho-suk Maeng, Seoul, KR;
Man-seung Cho, Seoul, KR;
Young-ok Cha, Gwangmyeong-si, KR;
Sang-Jin Pak, Yongin-si, KR;
Kee-Han Uh, Yongin-si, KR;
Ho-Suk Maeng, Seoul, KR;
Man-Seung Cho, Seoul, KR;
Young-Ok Cha, Gwangmyeong-si, KR;
Abstract
In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in response to a sensing signal output from the output node. A test pixel part includes pixels selected from a plurality of pixels arranged in the display panel and receives the driving signal from the test circuit to display a gray-scale corresponding to the driving signal. A brightness measurer measures a brightness corresponding to the gray-scale displayed in the test pixel part to compare the measured brightness with a predetermined brightness, thereby testing whether the light sensor built in the display panel is normally operated.