DISPLAY UNIT AND ELECTRONIC APPARATUS

• US 20130147858A1
• Filed: 11/16/2012
• Published: 06/13/2013
• Est. Priority Date: 12/08/2011
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Omoto, Keisuke
• Granted Patent: US 9,583,037 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0295 by monitoring each display pixel
• CPC Class Codes: G09G 2330/10 Dealing with defective pixels
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

A display unit includes: a display panel including, for each pixel, four or more types of sub-pixels that are different from one another in luminescent colors; and a driving circuit applying a pulse based on an image signal to each of the sub-pixels, and applying, when the sub-pixels include a sub-pixel of a defect dot, a compensated pulse configured to correct the defect dot to the sub-pixels that are adjacent or close to the sub-pixel of the defect dot.

Claims

1. A display unit, comprising:

a display panel including, for each pixel, four or more types of sub-pixels that are different from one another in luminescent colors; and

a driving circuit applying a pulse based on an image signal to each of the sub-pixels, and applying, when the sub-pixels include a sub-pixel of a defect dot, a compensated pulse configured to correct the defect dot to the sub-pixels that are adjacent or close to the sub-pixel of the defect dot.

2. The display unit according to claim 1, wherein the compensated pulse is configured to allow a total luminance of the sub-pixels, adjacent or close to the sub-pixel of the defect dot and to which the compensated pulse is applied, to have a magnitude that corrects the defect dot.

3. The display unit according to claim 2, wherein the compensated pulse is configured to allow the total luminance to be same or substantially same as a luminescence that is supposed to be obtained by the sub-pixel of the defect dot at the time when the sub-pixel of the defect dot emits light.

4. The display unit according to claim 2, wherein each of the pixels includes, as the four or more types of sub-pixels, three first sub-pixels and one or more second sub-pixels, the three first sub-pixels emitting light of respective three primary colors, and the one or more second sub-pixels emitting color light obtained by additive color mixing.

5. The display unit according to claim 4, wherein the driving circuit applies the compensated pulse to the second sub-pixels that are adjacent or close to the sub-pixel of the defect dot, in carrying out a monochromatic display using the first sub-pixels in a region that includes the defect dot.

6. The display unit according to claim 4, wherein the driving circuit applies the compensated pulse to the first sub-pixels that are adjacent or close to the sub-pixel of the defect dot, in carrying out a monochromatic display using the one or more second sub-pixels in a region that includes the defect dot.

7. The display unit according to claim 4, wherein the driving circuit applies, in carrying out a monochromatic display using one of the first sub-pixels and the one or one of the second sub-pixels in a region that includes the defect dot, the compensated pulse to the first sub-pixels that are adjacent or close to the sub-pixel of the defect dot and that are unused in the monochromatic display.

8. The display unit according to claim 1, wherein the pixels included in the display panel are arranged two-dimensionally, and the sub-pixels are arranged two-dimensionally in each of the pixels.

9. The display unit according to claim 8, wherein the sub-pixels are arranged to prevent the sub-pixels of same type among the four or more types from being placed next to each other.

10. The display unit according to claim 1, wherein

the pixels included in the display panel are arranged two-dimensionally in a row direction and a column direction, and the sub-pixels are arranged in the row direction in each of the pixels, and

the driving circuit applies, when the sub-pixels include the sub-pixel of the defect dot, the compensated pulse to the sub-pixels that interpose the sub-pixel of the defect dot therebetween in the row direction.

11. An electronic apparatus with a display unit, the display unit comprising:

a display panel including, for each pixel, four or more types of sub-pixels that are different from one another in luminescent colors; and

a driving circuit applying a pulse based on an image signal to each of the sub-pixels, and applying, when the sub-pixels include a sub-pixel of a defect dot, a compensated pulse configured to correct the defect dot to the sub-pixels that are adjacent or close to the sub-pixel of the defect dot.