DISPLAY METHOD OF DISPLAY DEVICE

• US 20110181802A1
• Filed: 01/18/2011
• Published: 07/28/2011
• Est. Priority Date: 01/20/2010
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Wakimoto, Kenichi, Hayakawa, Masahiko
• Granted Patent: US 8,947,406 B2
• Time in Patent Office: Days
• US Class Current: 349/19
• CPC Class Codes: G09G 2320/10 Special adaptations of display systems for operation with variable images
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/02 Handling of images in compressed format, e.g. JPEG, MPEG
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A display method suitable for an image provided by a digital data file and/or a display method of a display device in which the image quality and power consumption are adjusted in accordance with the state of the display device or at user'"'"'s request to display an image. The image is displayed on the display device in which a plurality of pixels having a pixel electrode connected to a switching element whose off-state current is reduced, using the image provided by the digital data file and data which is provided by the digital data file and is correlated to an operation of the display device.

Claims

1. A display method comprising:

displaying an image on a display device, using the image provided by a digital data file and data which is provided by the digital data file and is correlated to an operation of the display device, the display device including a plurality of pixels, each of the pixels including a pixel electrode connected to a switching element.

3. The display method of a display device according to claim 1 or claim 2, wherein the data is an extension of the digital data file.

4. The display method of a display device according to claim 1 or claim 2, wherein the data is a script of the digital data file.

5. The display method of a display device according to claim 1 or claim 2, wherein the data is a header of the digital data file.

6. The display method of a display device according to claim 1, wherein the switching element comprises an oxide semiconductor layer.

8. The display method of a display device according to claim 6 or claim 7, wherein a carrier concentration of the oxide semiconductor layer is 1×

10¹⁴/cm³ or less.

9. The display method of a display device according to claim 1, wherein off-state current of the switching element is reduced.

2. A display method of a display device, the display device comprising:

a display panel; and

an image processing circuit,

wherein the display panel includes a plurality of pixels, each of the pixels being connected to a scan line and a signal line and having a transistor and a pixel electrode connected to the transistor,

the display method comprising;

controlling an alignment of liquid crystals in the pixel electrode,

holding data which is provided by a digital data file and is correlated to an operation of the display device in a memory circuit of the image processing circuit, and

outputting an image signal and a control signal to the display panel in accordance with the data in a display control circuit of the image processing circuit.

7. The display method of a display device according to claim 2, wherein the transistor comprises an oxide semiconductor layer.

10. The display method of a display device according to claim 2, wherein off-state current of the transistor is reduced.

11. A display device comprising:

a display panel; and

an image processing circuit,

wherein the display panel includes a plurality of pixels, each of the pixels being connected to a scan line and a signal line and having a transistor and a pixel electrode connected to the transistor,

wherein the pixel electrode controls an alignment of liquid crystals, and

wherein the image processing circuit includes a memory circuit configured to hold data which is provided by a digital data file and is correlated to an operation of the display device and a display control circuit configured to output an image signal and a control signal to the display panel in accordance with the data.

12. An electronic device having the display device according to claim 11, wherein the electronic device is selected from the group consisting of an electronic book reader and a solar battery.