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. 12, 2010
Filed:
Oct. 16, 2007
Chun-seok Ko, Hwaseong-si, KR;
Baek-woon Lee, Yongin-si, KR;
Chun-seok Ko, Hwaseong-si, KR;
Baek-woon Lee, Yongin-si, KR;
Samsung Electronics Co., Ltd., Gyeonggi-do, KR;
Abstract
A display device capable of expressing gradations with improved accuracy is presented. The device includes: a switching thin film transistor (TFT) and a driving TFT on an insulating substrate; a first electrode electrically connected with the driving TFT; a light emitting layer; a second electrode that supplies a common voltage to the light emitting layer; and a data driver that supplies the switching TFT with a data voltage ranging from a first voltage to a second voltage. The first voltage, the second voltage and the common voltage satisfy the equations: 1) First voltage−common voltage−voltage dropped by light emitting layer=black voltage±0.1|black voltage−white voltage|; 2) Second voltage−common voltage−voltage dropped by light emitting layer=white voltage±0.1|black voltage−white voltage|. The black voltage and the white voltage refer to gate-source voltages (V) that express the lowest gradation and the highest gradation, respectively.