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Electronic paper display device and driving method thereof

A display device and electronic paper technology, applied in the field of electronic paper, can solve the problems of inability to realize, multi-grayscale display, less combination, etc., and achieve the effect of accelerating refresh speed, fast grayscale display, and reducing requirements

Active Publication Date: 2012-09-05
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the screen refresh frequency is basically fixed (about 50Hz), the frequency of each pixel voltage refresh is also fixed (that is, it is consistent with the screen refresh frequency), that is, the interval between pulses is fixed, and each refresh The pixel voltage is also fixed (such as 0V, ±15V or ±30V), so there are fewer possible combinations, and more grayscale displays cannot be achieved

Method used

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  • Electronic paper display device and driving method thereof
  • Electronic paper display device and driving method thereof
  • Electronic paper display device and driving method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 As shown, the electronic paper display device includes pixel 1, pixel 2 ... pixel 16, pixel 1 includes TFT11 and TFT12, pixel 2 includes TFT21 and TFT22, pixel 3 includes TFT31 and TFT32, pixel 4 includes TFT41 and TFT42, pixel 5 Including TFT51 and TFT52, pixel 6 includes TFT61 and TFT62, pixel 7 includes TFT71 and TFT72, pixel 8 includes TFT81 and TFT82, pixel 9 includes TFT91 and TFT92, pixel 10 includes TFT101 and TFT102, pixel 11 includes TFT111 and TFT112, pixel 12 includes TFT 121 and TFT 122 , pixel 13 includes TFT 131 and TFT 132 , pixel 14 includes TFT 141 and TFT 142 , pixel 15 includes TFT 151 and TFT 152 , and pixel 16 includes TFT 161 and TFT 162 .

[0044] The data line Data1 is electrically connected to TFT11, TFT51, TFT91 and TFT131, the data line Data2 is electrically connected to TFT12, TFT52, TFT92 and TFT132, the data line Data3 is electrically connected to TFT21, TFT61, TFT101 and TFT141, and the data line Data4 is electrically connec...

Embodiment 2

[0057] In this embodiment, the turn-on periods of the at least two TFTs are the same, that is, as long as the at least two TFTs are turned on once within a refresh period, the turn-on periods of each TFT are the same.

[0058] by figure 1 As shown, each pixel contains two independently controllable TFTs, and there are 4 rows of pixels of 4*4 in total. One refresh cycle includes 4 refresh times. For example, each row of pixels has 2 gate lines, and there are 8 Gate lines in total. The gate lines Gate1 and Gate2 respectively control the two TFTs of the first row of pixels, the gate lines Gate3 and Gate4 respectively control the two TFTs of the second row of pixels, the gate lines Gate5 and Gate6 respectively control the two TFTs of the third row of pixels, and the gate lines Gate3 and Gate4 respectively control the two TFTs of the third row of pixels. Lines Gate7 and Gate8 respectively control the two TFTs of the pixels in the fourth row. At the first time in a refresh cycle, t...

Embodiment 3

[0060] When the at least two TFTs are driven with different turn-on period intervals, more grayscale combinations can be realized, especially in combination with the above-mentioned application of different voltages to the at least two TFTs, then a high voltage can be provided to the pixel After that, a low voltage will be given soon, and then finer grayscale control can be performed after a fast response.

[0061] also with figure 1 As shown, each pixel contains two independently controllable TFTs, and there are 4 rows of pixels of 4*4 in total. One refresh cycle includes 4 refresh times. For example, each row of pixels has 2 gate lines, and there are 8 Gate lines in total. The gate lines Gate1 and Gate2 respectively control the two TFTs of the first row of pixels, the gate lines Gate3 and Gate4 respectively control the two TFTs of the second row of pixels, the gate lines Gate5 and Gate6 respectively control the two TFTs of the third row of pixels, and the gate lines Gate3 an...

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Abstract

The invention relates to an electronic paper display device and a driving method thereof. The electronic paper display device comprises a plurality of pixels, wherein each pixel comprises at least two thin-film transistors which are respectively and electrically connected with a data line and a grid line, and each thin-film transistor is opened once in one refresh period. The electronic paper display device is characterized in that at each time, at least two lines of TFTs (Thin Film Transistor) are opened simultaneously and are at least updated twice; and the twice updating can be matched with different voltage and period intervals. According to the invention, the refreshing speed is accelerated, the requirement for storage capacitance can be reduced, and faster gray-level updating can be realized; and by arrangement of different refresh period intervals, more pulse combination schemes are provided, so that more and faster gray-level display is realized.

Description

technical field [0001] The invention relates to the technical field of electronic paper, in particular to an electronic paper display device and a driving method. Background technique [0002] Electronic paper display devices, generally referred to as electronic paper, also known as digital paper, are the combination of the characteristics of ordinary paper display information and the characteristics of computer display screens. Existing printing products are mainly realized by paper, and the rapid increase of paper consumption has caused great damage to the environment. In this case, electronic paper display devices came into being. The thickness of electronic paper display devices can be equivalent to that of ordinary paper, which can replicate the display characteristics of paper and can be reused. Moreover, electronic paper display devices can display dynamic images, so electronic paper display devices Display devices are considered to be expected to replace existing pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G02F1/167G02F1/16766
CPCG02F1/167G09G3/2081G09G3/344G09G2310/0205G09G2310/0224G09G2310/0262G09G2320/0252G02F1/16766G09G5/10G09G3/2003G09G3/2074G09G2300/0426G09G2300/0809G09G2320/0233
Inventor 张卓盖翠丽
Owner BOE TECH GRP CO LTD
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