Electro-optical device, driving method thereof, and electronic apparatus

• US 20070176869A1
• Filed: 12/19/2006
• Published: 08/02/2007
• Est. Priority Date: 02/02/2006
• Status: Abandoned Application

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Sanyo Epson Imaging Devices Corporation (Seiko Group)
• Inventors: Fujita, Shin
• Application Number:
  US11/640,838
• Publication Number:
  US 20070176869A1
• Time in Patent Office: Days
• US Class Current: 345/88
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources

Abstract

An electro-optical device which has a display region including a plurality of pixels each of which has a plurality of sub-pixels displaying different monochromes, the sub-pixels having scan lines, data lines, pixel electrodes and switching elements arranged at intersections of the scan lines and the data lines. The electro-optical device includes: a data line driving circuit that drives the data lines, wherein the plurality of pixels is constituted by the sub-pixels that are arranged in two or more rows in a direction that the data lines extend and in two or more columns in a direction that the scan lines extend, wherein the data line driving circuit has a demultiplexer having a plurality of output terminals relative to one input terminal and connecting the selected output terminal of the plurality of output terminals to the input terminal so that it distributes image signals supplied as time division signals to the data lines.

Claims

1. An electro-optical device having a display region including a plurality of pixels each of which has a plurality of sub-pixels displaying different monochromes, the sub-pixels having scan lines, data lines, pixel electrodes, and switching elements arranged at intersections of the scan lines and the data lines, the apparatus comprising:

a data line driving circuit that drives the data lines, wherein the plurality of pixels is constituted by the sub-pixels that are arranged in two or more rows in a direction that the data lines extend and in two or more columns in a direction that the scan lines extend, wherein the data line driving circuit has a demultiplexer having a plurality of output terminals relative to one input terminal and connecting a selected output terminal of the plurality of output terminals to the input terminal so that it distributes image signals supplied as time division signals to the data lines.

2. The electro-optical device according to claim 1, further comprising a scan line driving circuit supplying scan signals sequentially to the scan lines, wherein each of the plurality of pixels is constituted by the sub-pixels arranged in two columns in the direction that the scan lines extend, wherein the scan line driving circuit supplies scan signals at a duty ratio of twice that in the case of the plurality of pixels having the sub-pixels arranged in one column in the direction that the scan lines extend.

3. The electro-optical device according to claim 2, wherein the scan line driving circuit supplies the scan signals at 120 Hz.

6. An electronic apparatus having the electro-optical device according to claim 1.

4. A method of driving an electro-optical device having a display region constituted by a plurality of pixels that is constituted by a plurality of sub-pixels each displaying different monochromes, the sub-pixels having scan lines, data lines, pixel electrodes and a switching element arranged at intersections of the scan lines and the data lines, the method comprising:

forming the plurality of pixels by arranging the sub-pixels in two or more rows in a direction that the data lines extend and in two or more columns in a direction that the scan lines extend;

making one column as a first sub-pixel group and the other column as a second sub-pixel group among the sub-pixels in two columns arranged in a direction that the scan lines extend;

supplying scan signals to the scan lines to make switching elements associated with the first sub-pixel group enter a conducting state and in this state, supplying image signals to the data lines to supply the image signals to pixel electrodes associated with the first sub-pixel group; and

supplying scan signals to the scan lines to make switching elements associated with the second sub-pixel group enter a conducting state and in this state, supplying image signals to the data lines to supply image signals to pixel electrodes associated with the second sub-pixel group.

5. The method of driving an electro-optical device according to claim 4, further comprising:

constituting each of the plurality of pixels by arranging the sub-pixels in two columns in a direction that the scan lines extend, during supply of the image signals to pixel electrodes in the first sub-pixel group and the second sub-pixel group; and

supplying scan signals during supply of image signals to pixel electrodes in the first sub-pixel group and the second sub-pixel group at a duty ratio of twice in writing that in the case in which each of the plurality of pixels are formed by arranging the sub-pixels in one column in the direction that the scan lines extend.