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:
Feb. 05, 2019
Filed:
Jan. 24, 2018
Joled Inc., Tokyo, JP;
Hiroshi Takahara, Osaka, JP;
Hitoshi Tsuge, Tokyo, JP;
JOLED INC., Tokyo, JP;
Abstract
An electroluminescent (EL) display apparatus and method of control are provided. A display screen includes gate signal lines which intersect source signal lines. A pixel provided with an EL device corresponds to each intersection of the gate and source signal lines. A driving transistor is provided for each pixel to supply a current to the EL device. A first switch transistor is provided on a current path through which the current is supplied to the EL device. A gate driver circuit is connected to the gate signal lines. The gate driver circuit includes a shift register circuit, and outputs a select or non-select signal for the gate signal lines. The gate driver circuit turns the first switch transistor on and off to control a duty ratio of the display screen. The duty ratio is controlled by a start pulse fed to the shift register circuit.