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Driving method of display device

A driving method and technology for display devices, which are applied to static indicators, cathode ray tube indicators, instruments, etc., can solve problems such as video signals cannot be accurately input, low image display quality, etc., achieve good image display, simplify peripheral The effect of the circuit structure

Inactive Publication Date: 2006-08-09
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that video signals cannot be accurately input into the panel, which results in low display quality of images

Method used

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  • Driving method of display device
  • Driving method of display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0033] will refer to figure 1 , 2A Embodiment 1 is described with 2B. figure 1 is a timing chart showing a driving method of the display device. Figure 2A and 2B shows the use of figure 1 The timing diagram shown in the drive method shows the structure of the device.

[0034] exist Figure 2A Among them, a display device 100 includes a panel 101 and a peripheral circuit 102 . The peripheral circuit 102 includes a controller 104 and a memory 103 . The source video signal SVD input into the display device is input into the peripheral circuit 102 (in Figure 2A is indicated by "IN"). The source video signal SVD input into the peripheral circuit 102 is written into the memory 103 through the controller 104 . The video signal written in the memory 103 is read out by the controller 104 and output from the peripheral circuit 102 as a video signal VD (in Figure 2A is indicated by "OUT"). A video signal VD is input into panel 101 . Panel 101 performs image display using v...

Embodiment approach 2

[0054] The following will refer to Figure 3A , 3B and Figure 4 A description of Embodiment Mode 2 is made. Figure 3A and 3B Shown is a more specific structure of the memory 103 in the display device shown in FIG. 2, and the driven state of the memory 103 in each of two consecutive frame periods Fi and F(i+1). Figure 4 is shown in use Figure 3A and 3B The timing chart of the driving method of the display device in the case of the memory shown in FIG. 2 as the memory 103. It should be noted that, figure 1 and Figure 4 Common parts among them are denoted by common reference numerals, and descriptions thereof will be omitted.

[0055] Such as Figure 3A and 3B As shown in , the memory 103 has a first memory area 301 and a second memory area 302 . Each of the first memory area 301 and the second memory area 302 has a storage capacity capable of storing video signals corresponding to a plurality of pixels in the panel 101 .

[0056] During the frame period Fi, the ...

Embodiment approach 3

[0062] In Embodiment 3, reference will be made to Figure 5A and 5B A description is made of an example of the panel 101 in FIG. 2 . exist Figure 5A , the panel 101 has a pixel portion 501 including a plurality of pixels 500 arranged in a matrix. The pixel portion 501 may have an active matrix arrangement in which a switching element such as a thin film transistor is provided in each pixel 500 . As a display element of the pixel 500 , a light emitting element such as an electroluminescent element may be provided or a liquid crystal element may be provided.

[0063] It should be noted that if Figure 5B As shown in , a driver circuit for driving the pixel portion 501 may be provided on the same substrate as the pixel portion 501 . It should be noted that, Figure 5A and 5B Common parts therebetween are denoted by common reference numerals, and descriptions thereof will be omitted. exist Figure 5B In , the first driver circuit 503 and the second driver circuit 504 are...

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Abstract

A driving method of a display device for performing time-division gray scale display is disclosed, which is capable of inputting accurate data into a panel by using one memory. M groups each having a pair of a first period and a second period are provided in one frame period. Video signals are written into a memory in the first period of at least one group among the m groups, while video signals are read out from the memory in the respective second periods of the m groups. The start timing of reading out video signals from the memory is synchronized with the start timing of each of the n sub-frame periods.

Description

technical field [0001] The present invention relates to a driving method of an active matrix display device having a switching element in each pixel and a memory for storing a video signal input into each pixel. More particularly, the present invention relates to a driving method of a display device that expresses gray scales by controlling a light emitting period of each pixel. Background technique [0002] As a driving method of a display device, there have been proposed methods such as expressing gradation by dividing one frame period into a plurality of subframe periods and selecting light emission or non-light emission of each pixel by inputting a video signal thereto in each subframe period. A driving method of a display device (hereinafter also referred to as time-division grayscale display) (see Patent Document 1). [0003] For example, one frame period is divided into first to third subframe periods, and (light emission length of the first subframe period): (light ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20
CPCG09G5/393G09G5/399G09G2360/126
Inventor 远藤正己
Owner SEMICON ENERGY LAB CO LTD
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