Displaying method for colour electrophoretic displaying device based on photo crystal concept

A technology of color electrophoresis and display method, which is applied in instruments, optics, nonlinear optics, etc. to achieve the effect of low energy consumption and high reflection

Inactive Publication Date: 2004-04-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the currently researched microcapsule electrophoretic displays can only display two colors (usually black and white), so it is of great application value to study high-efficiency and low-cost color electrophoretic displays.

Method used

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  • Displaying method for colour electrophoretic displaying device based on photo crystal concept
  • Displaying method for colour electrophoretic displaying device based on photo crystal concept
  • Displaying method for colour electrophoretic displaying device based on photo crystal concept

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Embodiment 1

[0029] Firstly, microcapsules whose walls are urea-formaldehyde polymers were synthesized by in-situ polymerization, and microcapsules with a median size of 20-60 μm were screened out. These microcapsules contained a large number of particles with a particle size of 370 μm. ±10nm polystyrene microspheres and water. Then these microcapsules with a particle size of 20-60 μm are coated between two electrode panels. One of the two electrodes is glass containing a patterned transparent indium tin oxide (ITO) conductive film, and the distance between the two electrode panels is microspheres. 1.5-2 times the diameter. The lead wire is used to apply voltage between the two electrode panels, and the microspheres are arranged in different ways by applying different voltages to different pixel units, thereby obtaining different reflected light. For example, in this embodiment, when the voltage applied to the pixel unit is 2V, the reflected light obtained in the direction perpendicular t...

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Abstract

The method imposes external electric field on microball cladded in microcapsule between two parallel electrode panel and the microballs are directional-moved and order-arranged under the action of the external electric field because of electric charge of itself so colour display can be obtained by totally reflecting light mating to the wavelength. Since the present invention applies method of varying external electric field i.e voltage to adjust ball arrangement state i.e ordering structure period of photon crystal, the aim of colour display can be achieved by generating different, reflection light.

Description

technical field [0001] The invention relates to a display method and a display for a color electrophoretic display based on the concept of photonic crystals, belonging to the technical field of electrophoretic displays. Background technique [0002] Since the electrophoretic display has performance advantages such as low energy consumption, high reflection, and wide viewing angle, extensive research has been done on this technology. However, in the initial research work, the electrophoretic display could not work stably due to particle agglomeration and migration, so it has not been commercially applied. In 1997, B.Comiskey et al. of E-INK Corporation of the United States proposed the method of constructing electrophoretic display (also known as electronic paper) with microcapsules. This method successfully solved the problem of particle agglomeration and migration, thus making electrophoretic display effective possibility of commercial application. Most of the currently r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167
Inventor 周济沈建红李勃蔡敏敏
Owner TSINGHUA UNIV
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