An oil breakdown controlled opening system for efd device and its manufacturing method

An oil breakdown and electrode technology, applied in the field of EFD display, can solve the problems of unpredictable oil layer movement, small hysteresis effect, and different oil layer breakdown points, etc., and achieve the effect of improving display effect, reducing hysteresis effect, and easy gray scale

Active Publication Date: 2017-02-08
SOUTH CHINA NORMAL UNIVERSITY +2
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Problems solved by technology

[0008] 1) The breakdown point of the oil layer of different pixels may be different;
[0009] 2) The movement of the oil layer thus penetrated is unpredictable
However, it is generally desired that the hysteresis effect in EFD display devices be small, whereby the pixel gray level (which corresponds proportionally to the pixel's open area size) can be easily modulated by the applied voltage

Method used

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  • An oil breakdown controlled opening system for efd device and its manufacturing method
  • An oil breakdown controlled opening system for efd device and its manufacturing method
  • An oil breakdown controlled opening system for efd device and its manufacturing method

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Embodiment Construction

[0040] Such as image 3 As shown, in the existing EFD pixel design, the height of the pixel wall 3 is uniform, which makes the operation of the pixel more sensitive to the defects of the existing EFD display structure described in this paper, such as the inconsistent direction of oil layer movement and hysteresis effect . From an electrical point of view, an EFD pixel can be seen as a combination of two capacitances: C1 is the first liquid (e.g. oil layer) capacitance representing the inert liquid, and C2 is the dielectric layer capacitance representing the dielectric layer. Therefore, the total capacitance C=C1*C2 / (C1+C2). The charge accumulated on the interface is proportional to the total capacitance. In the following embodiments according to the present invention, this principle will be used to manufacture a novel pixel wall 3 structure and solve the above-mentioned problems.

[0041] Such as Figure 4a and Figure 4b Shown is an EFD display structure with pixel walls...

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Abstract

The invention discloses an oil breakdown controlled opening system for an EFD device and a manufacturing method thereof, in which a step is arranged on the base below the lower electrode, so that the second thickness of the first liquid on the step is smaller than the second thickness of the first liquid on the step The first thickness beyond the steps is small. This thickness difference makes when a preset lower voltage is applied between the upper electrode and the lower electrode, the first liquid on the step is firstly broken down by the second liquid, and the first liquid is pushed by the second liquid, and the second liquid The zone moves towards the first zone. Thus, in the EFD pixel unit, the breakdown point of the oil layer as an inert liquid is in the required ideal area, and is less affected by too much or too little filling of the oil layer; in order to break down the oil layer, only a lower The potential difference, therefore, mitigates the hysteresis effect, which makes the gray scale of the pixel easy to control.

Description

technical field [0001] The invention relates to an oil breakdown controlled opening system for EFD devices and a manufacturing method thereof, belonging to the technical field of EFD displays. Background technique [0002] At present, the display unit used for text, image, video and interactive interface generally adopts flat panel display structure. In this field, widely used are, for example, microfluidic display system (Electro fluidic display system, EFD), electrophoretic display System (Electrophoretic display system), plane switching (In-Plane-Switching, IPS), electro-osmosis display system (Elctro-osmosis display system), and liquid crystal display LCD, etc. Part of the display structure adopts reflective display, for example, EFD applied to electronic ink (E ink) or electronic paper. EFD can also be called an electrowetting display (Electrowetting display). Electrowetting refers to changing the wettability of the droplet on the substrate by changing the voltage betw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/02
Inventor 周国富李发宏罗伯特·安德鲁·海耶斯
Owner SOUTH CHINA NORMAL UNIVERSITY
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