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An improved alignment method for efd assembly

A substrate and cover technology, applied in the field of EFD display, can solve the problems of misalignment, low yield, and inability to correct unaligned defects, so as to improve yield, reduce errors and deformation, and improve reversibility and reliability. The effect of modifiability

Active Publication Date: 2017-10-10
SOUTH CHINA NORMAL UNIVERSITY +2
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large-area displays, the requirements for alignment and lamination equipment are very high. Once the adhesive sealing material is in contact with the cover or substrate, it will not be possible to correct any misalignment defects, resulting in a low yield rate of the process.
Depending on the quality of the sealing interface and the parallelism between the substrate and cover, this misalignment defect can occur when there is a very large separation between the color filter and the cover or substrate

Method used

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  • An improved alignment method for efd assembly
  • An improved alignment method for efd assembly
  • An improved alignment method for efd assembly

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Embodiment Construction

[0030] Regarding the application of the electrowetting display principle, its schematic structure diagram is as follows Figure 1a , 1b As shown, the EFD display unit includes a pixel wall 13, a substrate 14, a transparent electrode 15, and a cover plate (not shown) containing a sealing material. Figure 1a It is shown that when no voltage V is applied, the colored oil layer 11 completely covers the hydrophobic coating 12; Figure 1b It is shown that after the voltage V is applied, the colored oil layer 11 is pushed to one side. When a voltage V is applied to the electrodes, charges accumulate on the lower surface of the polarized liquid layer 10, and then its electrostatic force F el Overcome the capacitive force F cap The colored oil layer 11 is broken down to cover the hydrophobic coating 12 on the substrate, so that the polarized liquid layer 10 is in contact with the original hydrophobic coating under the action of the voltage V. By further increasing the voltage V, the...

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Abstract

The invention discloses an improved alignment method for EFD assembly, comprising the steps of: (1) completely immersing the substrate in a container filled with liquid; (2) completely immersing the cover plate with the seal attached in the A container filled with liquid and placed on the substrate, the cover plate and the substrate are combined to form an EFD cell assembly, wherein the seal on the cover plate is not in direct contact with the substrate; (3) Take out the EFD cell assembly from the container, A liquid layer is maintained between the sealing member on the cover plate and the base; (4) aligning the cover plate and the base; (5) forming a permanent seal between the sealing member on the cover plate and the base. The reversibility and modifiability of the alignment are greatly improved, thereby increasing the yield rate while maintaining the alignment accuracy.

Description

technical field [0001] The invention relates to an improved alignment method for EFD assembly, which belongs to the technical field of EFD display. Background technique [0002] EFD technology, also known as electrowetting display (Electrowetting display) technology, the technology is based on the movement of the interface between the colored non-polar oil and polar liquid controlled by the voltage, this technology and the current industry standard LCD displays are different. However, although the materials used are different, the EFD can be processed using basically the same process equipment as that used to manufacture LCDs. In EFD manufacturing technology, what is different from current LCD manufacturing technology is the equipment and process method used to dose the liquid and assemble the EFD. [0003] Filling and encapsulation of EFD devices is unavoidable in water during the manufacturing process. In the case of color displays by color filters or superimposed color...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/00
CPCG02B26/00
Inventor 罗伯特·安德鲁·海耶斯窦盈莹吴昊郭媛媛唐彪周国富
Owner SOUTH CHINA NORMAL UNIVERSITY
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