DISPLAY AND A METHOD OF DRIVING THE SAME

• US 20100259533A1
• Filed: 03/25/2010
• Published: 10/14/2010
• Est. Priority Date: 04/09/2009
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Uchino, Katsuhide, Yamashita, Junichi, Kato, Masakazu
• Application Number:
  US12/731,750
• Publication Number:
  US 20100259533A1
• Time in Patent Office: Days
• US Class Current: 345/213
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/046 Dealing with screen burn-in prevention or compensation of the effects thereof
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

A display includes: a pixel circuit array section including a plurality of light-emitting elements and a plurality of pixel circuits; a scanning line drive circuit sequentially selecting the plurality of light-emitting elements and the plurality of the pixel circuits; a signal line drive circuit writing a light emission potential corresponding to a signal potential to a selected pixel circuit; and a control circuit, in which in each frame period, the control circuit outputs a light-off control signal at a lapse of a first period after writing the light emission potential to the selected pixel circuit by the signal line drive circuit, and then the control circuit outputs a light-on control signal at a lapse of a second period, and after that, the control circuit outputs a light-off control signal at a lapse of a third period which is longer than the first period.

Claims

1. A display comprising:

a pixel circuit array section including a plurality of scanning lines and a plurality of light-on/off control lines which are arranged in a row direction, a plurality of signal lines which are arranged in a column direction, and a plurality of light-emitting elements and a plurality of pixel circuits which are arranged in a matrix form corresponding to intersections between the scanning lines and the signal lines, respectively;

a scanning line drive circuit sequentially applying a selection pulse to the plurality of scanning lines so as to sequentially select the plurality of light-emitting elements and the plurality of the pixel circuits;

a signal line drive circuit applying a signal potential corresponding to a picture signal to each of the signal lines so as to write a light emission potential corresponding to the signal potential to a selected pixel circuit; and

a control circuit sequentially applying a light-on control signal to the plurality of light-on/off control lines so as to allow a steady current corresponding to the light emission potential to flow into a selected light-emitting element, and sequentially applying a light-off control signal to the plurality of light-on/off control lines so as to stop the steady current flowing through the selected light-emitting element,

wherein in each frame period, the control circuit outputs the light-off control signal (a first light-off control signal) at a lapse of a first period after writing the light emission potential to the selected pixel circuit by the signal line drive circuit, and then the control circuit outputs the light-on control signal at a lapse of a second period, and after that, the control circuit outputs the light-off control signal (a second light-off control signal) at a lapse of a third period which is longer than the first period.

2. The display according to claim 1, wherein

the control circuit outputs the second light-off control signal at a boundary between an nth frame period (where n is a positive integer) and an n+1 frame period, and then the control circuit outputs a correction start signal for starting correction of a potential of a part to which the light emission potential is to be written in the pixel circuit at a lapse of a fourth period.

3. The display according to claim 2, wherein

the fourth period is 1 millisecond or less.

4. The display according to claim 1, wherein

the first period is too short to reach the time when the light-emitting element starts emitting light by writing the light emission potential, or the first period is too short for a viewer to discriminate between light emission from the light-emitting element by writing the light emission potential and light emission from the light-emitting element by outputting the light-on control signal.

5. The display according to claim 4, wherein

the control circuit outputs the first light-off control signal immediately before, at the moment, or immediately after when the light-emitting element starts emitting light.

6. A method of driving a display, the display including:

a pixel circuit array section including a plurality of scanning lines and a plurality of light-on/off control lines which are arranged in a row direction, a plurality of signal lines which are arranged in a column direction, and a plurality of light-emitting elements and a plurality of pixel circuits which are arranged in a matrix form corresponding to intersections between the scanning lines and the signal lines, respectively;

a scanning line drive circuit sequentially applying a selection pulse to the plurality of scanning lines so as to sequentially select the plurality of light-emitting elements and the plurality of the pixel circuits;

a signal line drive circuit applying a signal potential corresponding to a picture signal to each of the signal lines so as to write a light emission potential corresponding to the signal potential to a selected pixel circuit; and

a control circuit sequentially applying a light-on control signal to the plurality of light-on/off control lines so as to allow a steady current corresponding to the light emission potential to flow into a selected light-emitting element, and sequentially applying a light-off control signal to the plurality of light-on/off control lines so as to stop the steady current flowing through the selected light-emitting element, the method comprising the step of;

in the display, in each frame period, outputting the light-off control signal (a first light-off control signal) at a lapse of a first period after writing the light emission potential to the selected pixel circuit by the signal line drive circuit, and then outputting the light-on control signal at a lapse of a second period, and after that, outputting the light-off control signal (a second light-off control signal) at a lapse of a third period which is longer than the first period.