ELECTRO-OPTICAL DEVICE, METHOD FOR DRIVING ELECTRO-OPTICAL DEVICE, AND ELECTRONIC APPARATUS

• US 20070229413A1
• Filed: 03/22/2007
• Published: 10/04/2007
• Est. Priority Date: 03/28/2006
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Hara, Hiroyuki
• Application Number:
  US11/689,944
• Publication Number:
  US 20070229413A1
• Time in Patent Office: Days
• US Class Current: 345/76
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/0283 Arrangement of drivers for different directions of scanning
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/2014 by modulation of the duration of a single pulse during which the logic level remains constant
• CPC Class Codes: G09G 3/3258 with pixel circuitry controlling the voltage across the light-emitting element
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes

Abstract

An electro-optical device includes a plurality of pixels, a plurality of write scan lines including a predetermined number of the plurality of pixels as a unit, and a drive device driving the plurality of write scan lines non-sequentially and adjusting a light-emission period of the plurality of pixels in accordance with a luminance ratio of an image.

Claims

1. An electro-optical device, comprising:

a plurality of pixels;

a plurality of write scan lines including a predetermined number of the plurality of pixels as a unit; and

a drive device driving the plurality of write scan lines non-sequentially and adjusting a light-emission period of the plurality of pixels in accordance with a luminance ratio of an image.

6. The electro-optical device according to claim 1, further comprising:

a plurality of erase scan lines formed corresponding to the plurality of write scan lines; and

a plurality of data lines formed with respect to the predetermined number of the plurality of pixels and extending in a direction intersecting with the plurality of write scan lines and the plurality of erase scan lines, wherein the drive device makes the plurality of pixels emit light via the plurality of write scan lines and not emit light via the plurality of erase scan lines.

7. The electro-optical device according to claim 6, wherein the drive device drives the plurality of erase scan lines non-sequentially in response to a driving of the plurality of write scan lines.

8. The electro-optical device according to claim 6, wherein the plurality of write scan lines are divided into zones every predetermined number as a unit in a sequential order and individually driven with respect to each zone by the drive device so as to be driven non-sequentially.

9. The electro-optical device according to claim 8, wherein the plurality of erase scan lines are divided into zones corresponding to the zones of the plurality of write scan lines and individually driven with respect to each zone by the drive device so as to be driven non-sequentially.

10. The electro-optical device according to claim 9, wherein the drive device shifts scan start timing of the plurality of write scan lines and scan start timing of the plurality of erase scan lines by a time period obtained by dividing a predetermined period by the number of zones, the plurality of write scan lines and the plurality of erase scan lines being driven independently with respect to each zone.

11. The electro-optical device according to claim 9, wherein the drive device drives each of the plurality of write scan lines and the plurality of erase scan lines a plurality of times during a predetermined period by driving the plurality of write scan lines and the plurality of erase scan lines during each period obtained by dividing the predetermined period into a plurality of periods.

12. The electro-optical device according to claim 11, wherein the drive device adjusts the light-emission period of the plurality of pixels during each period obtained by dividing the predetermined period into the plurality of periods.

13. The electro-optical device according to claim 6, wherein each of the plurality of pixels includes a drive element making each of the plurality of pixels emit light based on a signal from the plurality of write scan lines and the plurality of data lines, and a compensation circuit compensating variance of a characteristic of the drive element.

2. An electro-optical device, comprising:

a plurality of pixels; and

a drive device adjusting a light-emission period of the plurality of pixels in accordance with a luminance ratio of an image.

3. The electro-optical device according to claim 2, wherein the electro-optical device is an organic electroluminescent (EL) device having a light-emitting element included in each of the plurality of pixels.

4. The electro-optical device according to claim 2, wherein the electro-optical device is a liquid crystal device including:

the plurality of pixels each having a pixel electrode;

a counter electrode; and

a liquid crystal interposed between the pixel electrode and the counter electrode.

5. The electro-optical device according to claim 2, wherein the drive device adjusts non-light-emission timing of the plurality of pixels so as to adjust the light-emission period of the plurality of pixels.

14. The electro-optical device according to claim 2, wherein the plurality of pixels include a red pixel emitting red light, a green pixel emitting green light, and a blue pixel emitting blue light, and the drive device makes each of the red pixel, the green pixel, and the blue pixel emit light with identical light-emission timing, and not emit light with identical non-light-emission timing.

15. The electro-optical device according to claim 2, wherein the drive device adjusts the light-emission period of the plurality of pixels in a way that luminance of the plurality of pixels is nonlinear with respect to the luminance ratio of the image to be displayed.

22. An electronic apparatus, comprising the electro-optical device according to claim 2.

16. A method for driving an electro-optical device, comprising:

driving a plurality of write scan lines non-sequentially; and

adjusting a light-emission period of the plurality of pixels according to a luminance ratio of an image, wherein the electro-optical device includes a plurality of pixels and the plurality of write scan lines including a predetermined number of the plurality of pixels as a unit.

19. The method for driving an electro-optical device according to claim 16, wherein the electro-optical device includes a plurality of erase scan lines corresponding to the plurality of write scan lines, and the plurality of erase scan lines are non-sequentially driven in response to a driving of the plurality of write scan lines.

20. The method for driving an electro-optical device according to claim 19, wherein the plurality of write scan lines are divided into zones every predetermined number as a unit in a sequential order and individually driven with respect to each zone so as to be driven non-sequentially.

21. The method for driving an electro-optical device according to claim 20, wherein the plurality of erase scan lines divided into zones corresponding to the zones of the plurality of write scan lines are driven individually with respect to each zone so as to be driven non-sequentially.

17. A method for driving an electro-optical device, comprising adjusting a light-emission period of a plurality of pixels included in the electro-optical device in accordance with a luminance ratio of an image.

18. The method for driving an electro-optical device according to claim 17, wherein the light-emission period of the plurality of pixels is adjusted by adjusting non-light emission timing of the plurality of pixels.