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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.:

US 9959809 B1

PDFFull Text
Date of Patent:
May. 01, 2018

Filed:

Apr. 20, 2017

El display apparatus

Applicant:

Joled Inc., Tokyo, JP;

Inventors:

Hiroshi Takahara, Osaka, JP;

Hitoshi Tsuge, Tokyo, JP;

Assignee:

JOLED INC., Tokyo, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Jennifer Mehmood

Assistant Examiner:

Krishna Neupane

Int. Cl.
CPC ...
G09G 3/20 (2006.01); G06F 3/03 (2006.01); G09G 3/3275 (2016.01); G09G 3/36 (2006.01); G09G 3/325 (2016.01); G09G 3/3233 (2016.01); G09G 3/3266 (2016.01); H01L 27/12 (2006.01); H01L 27/32 (2006.01); H01L 27/15 (2006.01); H01L 51/52 (2006.01); H01L 33/56 (2010.01); H01L 29/786 (2006.01); H01L 33/58 (2010.01);
U.S. Cl.
CPC ...
G09G 3/325 (2013.01); G09G 3/2003 (2013.01); G09G 3/3233 (2013.01); G09G 3/3266 (2013.01); G09G 3/3275 (2013.01); H01L 27/124 (2013.01); H01L 27/127 (2013.01); H01L 27/1251 (2013.01); G09G 2300/0413 (2013.01); G09G 2300/0809 (2013.01); G09G 2310/0251 (2013.01); G09G 2310/0289 (2013.01); G09G 2320/0646 (2013.01); H01L 27/156 (2013.01); H01L 27/3216 (2013.01); H01L 27/3262 (2013.01); H01L 29/78645 (2013.01); H01L 29/78672 (2013.01); H01L 33/56 (2013.01); H01L 33/58 (2013.01); H01L 51/5253 (2013.01); H01L 51/5259 (2013.01); H01L 51/5281 (2013.01);
Abstract

An EL display apparatus according to the present invention includes an EL device adapted to emit light at a luminance corresponding to a current fed thereto. A source driver outputs a current higher than a current corresponding to an analog video signal to the EL device through a source signal line. This operation charges/discharges a parasitic capacitance present in the source signal line. A second gate driver circuit controls a transistor formed between the EL device and the source driver to operate so that the EL device is fed with the current for only a part of a one-frame period. As a result, the El device emits light for only the part of the period.

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