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An electrowetting display device and its preparation method

An electro-wetting display and electro-wetting technology, applied in the directions of instruments, optical components, optics, etc., can solve the problems of easy ink overturning, uneven pixel opening, poor effect, etc., so as to improve the display effect and avoid oil film overturning. wall, the effect of improving the display effect

Active Publication Date: 2021-01-05
SHENZHEN GUOHUA OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional electrowetting display device is working, on the one hand, due to the lack of control over the opening and movement of the ink, the ink may move to any corner of the pixel, resulting in uneven opening of the pixel; The height can usually be increased to 5 times the original height, which is much larger than the height of the pixel wall. Because the hydrophilicity of the pixel wall is not enough or the shape is not sharp enough, the ink is easy to overturn the wall, further affecting the display effect
At present, some researchers have tried to set openings in the electrode to control the movement of the oil film, but the effect is not good
Some researchers use physical or chemical methods to treat the surface of the pixel wall, such as coating a layer of hydrophilic material on the surface of the pixel wall, but this method not only adds additional processes, but also easily brings new problems

Method used

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  • An electrowetting display device and its preparation method
  • An electrowetting display device and its preparation method
  • An electrowetting display device and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see Figure 4 , the present embodiment provides an electrowetting display device, including two supporting plates up and down, and a polar liquid 8 and a non-polar liquid 7 encapsulated therein by a plastic frame 9, and the non-polar liquid 7 is usually ink , the upper support plate includes an upper substrate 1 and an electrode layer 2, the lower support plate includes a lower substrate 3, an electrode layer 4, a hydrophobic layer 5, a pixel wall 6 and a columnar structure 10 arranged on the hydrophobic layer 5; the electrode layer 4 is provided with an opening 11, the pixel wall 6 encloses a pixel grid, and the columnar structure 10 is located in the pixel grid.

[0040]The position of the columnar structure 10 is preferably located in the corner area of ​​the pixel grid adjacent to the opening 11, which is surrounded by a horizontal and vertical symmetry line passing through the center of the pixel and two pixel walls surrounding the opening structure, accounting for...

Embodiment 2

[0051] see Figure 9 , the present embodiment provides an electrowetting display device, including two supporting plates up and down, and a polar liquid 8 and a non-polar liquid 7 encapsulated therein by a plastic frame 9, and the non-polar liquid 7 is usually ink , the lower support plate includes a lower substrate 3, an electrode layer 4 and an insulating layer 15 above it, a hydrophobic layer 5, and a pixel wall 6 and a columnar structure 10 arranged on the hydrophobic layer 5 arranged in sequence, and the pixel wall 6 encloses a pixel grid , the columnar structure 10 is located in the pixel grid, and the upper support plate includes an upper substrate 1 and an electrode layer 2 .

[0052] The columnar structures 10 and the insulating layer 15 are formed of insulating materials, preferably prepared by photolithography using a non-conductive photoresist material. The material of the photoresist may be the same as that of the photoresist of the pixel wall, or may be a differ...

Embodiment 3

[0060]The method and steps in this embodiment are basically the same as in Embodiments 1-2, the difference is that the pixel wall 6 and the columnar structure 10 are manufactured separately by two-step photolithography, so different materials can be used to set the pixel wall 6 and the column shaped structure 10, the height and hydrophilicity and hydrophobicity of the pixel wall 6 and the columnar structure 10 can be different, in order to increase the resolution of the electrowetting display device, the height of the columnar structure can be reduced, preferably, the columnar structure The height is 1 / 5 to 1 of the height of the pixel wall, more preferably 1 / 5 to 1 / 2 of the height of the pixel wall. At the same time, since different materials can be used, the hydrophilicity of the columnar structure 10 and the pixel wall 6 It can be different. The columnar structure 10 is made of a material with higher hydrophobicity. The ink is not easy to move to the pixel wall 6, and it is ...

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Abstract

An electrowetting display array substrate, an electrowetting display device, and a manufacturing method thereof. The electrowetting display array substrate comprises a lower substrate (3), a lower electrode layer (4), a hydrophobic layer (5), a pixel wall (6), and a columnar structure (10). The columnar structure is located within a pixel grid and arranged adjacent to a corner of the pixel grid. The invention adds the columnar structure to the pixel grid and controls the position of an opening of an oil-film by means of a coordinated configuration between the columnar structure, an aperture electrode, and an insulation layer (15). By control of the electrical field intensities of different regions consistency of the turn-on state of a pixel and an oil-film movement is realized, improving the display effect of the display accordingly.

Description

technical field [0001] The invention relates to the field of semiconductor devices, in particular to an electrowetting display device and a preparation method thereof. Background technique [0002] Traditional electrowetting devices use electrowetting display devices as described in patent CN 102792207A, etc., see figure 1 , it includes two support plates up and down, and a polar liquid 8 and a non-polar liquid 7 encapsulated in it by a plastic frame 9, the non-polar liquid 7 is usually ink, and the upper support plate includes an upper substrate 1 and an upper electrode Layer 2, the lower support plate includes a lower substrate 3, a lower electrode layer 4, a hydrophobic layer 5, and a pixel wall 6 arranged on the hydrophobic layer 5 in sequence. The pixel wall encloses the smallest display unit—the pixel grid, and the pixel grid is usually Takes a square shape. see figure 2 with image 3 ,in figure 2 is the pixel grid diagram of a conventional electrowetting device...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/00
CPCG02B26/005
Inventor 周国富李发宏窦盈莹
Owner SHENZHEN GUOHUA OPTOELECTRONICS