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A fast full color electrophoretic display with improved driving

A display, color electrophoretic technology, applied in the field of color electrophoretic display, which can solve the problems of complex and expensive, slow update speed, limited brightness and/or color saturation

Inactive Publication Date: 2006-11-29
ADREA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, current designs either have limited brightness and / or color saturation, or are very complex and expensive, and thus are often associated with slow update speeds

Method used

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  • A fast full color electrophoretic display with improved driving
  • A fast full color electrophoretic display with improved driving
  • A fast full color electrophoretic display with improved driving

Examples

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Embodiment Construction

[0045] figure 1 The entire spectrum of visible light is illustrated, including the red region 101, the green region 102, and the blue region 103. The cyan filter 107 absorbs the red area, the magenta filter 108 absorbs the green area, and the yellow filter 109 absorbs the blue area. This type of color filter is often referred to as subtractive color, because one specific color is eliminated, while other colors remain unaffected. In comparison, the red 105 color filter absorbs the green and blue regions (so that red light is not affected), the green 106 color filter absorbs the red and blue regions, and the blue 104 color filter absorbs the red and green regions.

[0046] figure 2 The cross-section of the pixel 200 is schematically shown, and the pixel includes cyan 210, magenta 220, and yellow 230 sub-pixels. That particular pixel turns to display pure green light. Therefore, the green light is reflected and the remaining light is absorbed. The cyan sub-pixel 210 cannot displa...

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Abstract

The present invention provides a novel design for color electrophoretic displays. In the display, each pixel (200) comprises at least two sub-pixels (210, 220, 230), and each sub pixel is fitted with a color filter (211, 221, 231) and contains an electrophoretic media comprising two particle types (201, 202, 203). The color filters (211, 221, 231) in the sub-pixels of each pixel have essentially non-overlapping absorption bands, and together cover essentially all of the wavelengths over which the display is operative. Furthermore, the absorption bands of the particles in each sub-pixel (210, 220, 230) each cover a portion of the wavelengths that is not covered by the filter (211, 221, 231) in the respective sub-pixel. The wavelength bands typically correspond to different colors. Thereby each wavelength band, or color, can be emitted by more than one sub-pixel in each pixel, resulting in increased brightness. According to one particular embodiment, each pixel comprises three sub-pixels having a cyan, magenta, and yellow absorbing filter, respectively.

Description

Technical field [0001] The present invention relates to an electrophoretic display, and particularly to a color electrophoretic display that provides high brightness, high update speed, and easy manufacturing. Background technique [0002] Using a monochromatic display in combination with a structured RGB (red, green, blue) color filter can provide a full-color electrophoretic display-this has been demonstrated with an E-Ink display. The structured RGB filter transmits red, green, and blue light via the corresponding R, G, and B parts. The light that is not transmitted is absorbed in the filter and is substantially converted into heat. The general problem with using this full-color scheme is that the brightness of the display is limited. Essentially, due to absorption in the RGB filter, a full-color display is only 1 / 3 brighter than the monochrome version. The remaining 2 / 3 of the light is absorbed in the color filter. The prior art system based on black and white particles with ...

Claims

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Application Information

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IPC IPC(8): G02F1/167G02F1/1677
CPCG02F2001/1678G02F1/167G09G2320/0252G09G3/3446G02F1/1677
Inventor M·T·约翰逊L·J·M·舒兰根P·J·贝斯朱G·周
Owner ADREA LLC
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