Display apparatus and driving method therefor

Patent metadata

Field	Value
Publication number	US-9262967-B2
Application number	US-7679008-A
Country	US
Kind code	B2
Filing date	Mar 24, 2008
Priority date	Mar 30, 2007
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A display apparatus disclosed herein includes a plurality of pixel circuits, each having a plurality of switches configured to receive a driving signal of a predetermined period and to be controlled for opening and closing operation by the driving signal, a drive circuit configured to control the open/closed state of the switches, being operable to scan the pixel circuits and open and close the switches in periods independent of each other.

First claim

What is claimed is:

1. A display apparatus comprising:
a pixel array section having a plurality of pixel circuits, at least one of the plurality of pixel circuits including:
a light-emitting device;
a capacitor,
a drive transistor having a gate, a first current terminal, and a second current terminal, the first current terminal of the drive transistor connected to the light-emitting device;
a first switching transistor configured to supply a data signal from a data line to the capacitor; and
a second switching transistor configured to connect the second current terminal of the drive transistor and a power supply line; and

a peripheral section having a drive circuit configured to supply a first scanning signal and a second scanning signal,
wherein the first switching transistor is configured to be turned on once according to the first scanning signal within a field period, and
wherein the second switching transistor is configured to be turned on four times according to the second scanning signal within the field period.

2. The display apparatus according to claim 1 , wherein the first scanning signal and the second scanning signal are supplied from the peripheral section disposed on one side of the pixel array section.

3. The display apparatus according to claim 1 , wherein the drive circuit includes a plurality of shift registers connected in series.

4. The display apparatus according to claim 3 , wherein the drive circuit includes a plurality of inverters; and a decoder configured to provide a plurality of select signal lines to the plurality of inverters.

5. The display apparatus according to claim 4 , wherein each of the plurality of inverters is configured to provides the second scanning signal.

6. The display apparatus according to claim 4 , the drive circuit is configured to successively select a number of divisional regions according to a number of the plurality of select signals.

7. The display apparatus according to claim 4 , the drive circuit is configured to control the first switching transistor and the second switching transistor in response to input and output states of the plurality of shift registers.

8. The display apparatus according to claim 3 , wherein the plurality of shift registers is configured to receive a clock signal of the same period.

9. The display apparatus according to claim 3 , wherein a start signal of a period equal to four times a period of light emission of the light-emitting device is inputted to one of the plurality of shift registers.

Assignees

• Asano Mitsuru
• Tanikame Takao
• Joled Inc

Inventors

• Asano Mitsuru
• Tanikame Takao

Classifications

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G3/3266 Primary

  Details of drivers for scan electrodes · CPC title

• G09G2300/0852

  being a dynamic memory with more than one capacitor · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title