Display apparatus, display method and method of manufacturing a display apparatus

• US 20050007355A1
• Filed: 05/12/2004
• Published: 01/13/2005
• Est. Priority Date: 05/26/2003
• Status: Active Grant

• Current Assignee: EL Technology Fusion Godo Kaisha
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Miura, Hirotsuna
• Granted Patent: US 7,336,246 B2
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G09G 2300/0819 used for counteracting undesired variations, e.g. feedback or autozeroing
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/088 using a non-linear two-terminal element
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 2360/148 the light being detected by light detection means within each pixel
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

To precisely reduce fluctuations in brightness of respective light emitters when displaying an image by having a plurality of light emitters emit light, and thereby improve image quality. A display apparatus can be made of an arrangement of a plurality of pixels respectively composed of a predetermined driving circuit and a light emitter that emits light when driven by the driving circuit. Each pixel can include a correction circuit that detects an amount of light for the light emitter using a light receiver made of the same type of material as the light emitter and implements feedback control over the driving circuit based on a detection result.

Claims

1. A display apparatus composed of an arrangement of a plurality of pixels respectively composed of a predetermined driving circuit and a light emitter that emits light when driven by the driving circuit,

each pixel including a correction circuit that detects an amount of light for the light emitter using a light receiver made of a same type of material as the light emitter and that implements feedback control over the driving circuit based on a detection result.

2. A display apparatus according to claim 1, the correction circuit detecting an amount of external light and implementing feedback control of the driving circuit based on a detection result.

3. A display apparatus according to claim 1, the correction circuit being composed of a resistor and a photodiode whose resistance changes in accordance with an amount of received light, and being a series circuit that is coupled in parallel to a data voltage holding capacitor that is a component in the driving circuit.

4. A display apparatus according to claim 1, light receiver being formed of an organic EL display material.

5. A display apparatus according to claim 1, light emitter being formed of an organic EL display material.

6. A display apparatus according to claim 1, the organic EL display apparatus being composed of a plurality of the pixels arranged in two dimensions.

7. A display apparatus according to claim 1 that displays in color.

8. A display method that displays an image by individually driving light emitters provided corresponding to a plurality of arranged pixels,

an amount of light being detected individually for respective light emitters using light receivers composed of a same type of material as the light emitters and feedback control being implemented for driving the light emitters based on detection results.

9. A display method according to claim 8, external light being detected and feedback control being implemented for the driving circuits based on detection results thereof.

10. A display method according to claim 8, the light emitter being formed of an organic EL material.

11. A display method according to claim 8, the plurality of pixels being arranged in two dimensions.

12. A display method according to claim 8, a color display being achieved.

13. A display method according to claim 8, the light emitters and the light receivers being formed using an ink jet method.