Pixel driving circuit of organic-light emitting diode

Patent metadata

Field	Value
Publication number	US-8982020-B2
Application number	US-201314084619-A
Country	US
Kind code	B2
Filing date	Nov 20, 2013
Priority date	Aug 14, 2013
Publication date	Mar 17, 2015
Grant date	Mar 17, 2015

Abstract

A pixel driving circuit of an organic light emitting diode includes a first transistor including a first terminal, a control terminal and a second terminal and a capacitor including a first terminal and a second terminal. The first terminal and the second terminal of the capacitor are electrically coupled to the first terminal and the control terminal of the first transistor at a first node and a second node respectively. In a first period, a power source does not provide a power supply voltage to the first node, and a data voltage and a variable voltage are written in the first node and the second node respectively. In a second period, the power source provides the power supply voltage to the first node. The first transistor provides a driving current to an organic light emitting diode based on the voltage of the first node and the second node.

First claim

What is claimed is:

1. A pixel driving circuit of an organic light-emitting diode, comprising:
a first transistor, comprising:
a first terminal, electrically coupled to a power source;
a control terminal; and
a second terminal, electrically coupled to an organic light-emitting diode; and

a capacitor, comprising:
a first terminal, electrically coupled to the first terminal of the first transistor at a first node; and
a second terminal, electrically coupled to the contro…

Assignees

• Chunghwa Picture Tubes Ltd

Inventors

• Sun Bo-Jhang
• Huang Chin-Hai
• Huang Szu-Chi

Classifications

• G09G2310/0251

  Physics · mapped topic

• G09G3/3233 Primary

  Physics · mapped topic

• G09G2320/043

  Physics · mapped topic

• G09G2300/0866

  Physics · mapped topic