Display device based on phase-change materials

A display device, 3D display technology, applied in the direction of instruments, electrical components, optical components, etc., can solve the problems of high energy consumption, unable to display video, complicated preparation, etc., and achieve the effect of simple manufacturing

Active Publication Date: 2016-08-10
OXFORD UNIV INNOVATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some display technologies, such as backlit color displays, have relatively high energy consumption and are complex to manufacture
Different technologies provide non-backlit black and white displays, but have slower switching speeds, cannot display video footage, and of course lack color
Other technologies require high drive voltages that are not easy to generate and tend to have high energy consumption
With all of these technologies, there is also the problem of producing high-resolution displays

Method used

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  • Display device based on phase-change materials
  • Display device based on phase-change materials
  • Display device based on phase-change materials

Examples

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Embodiment Construction

[0023] will refer to figure 1 An embodiment of a display device, which shows a layered structure in cross-section, will be described. Portions 10 of solid material are arranged in layers. The material of this layer has a refractive index that can be changed permanently and reversibly by applying an appropriate voltage. Such materials, known as phase change materials (PCMs), undergo dramatic changes in both real and imaginary indices of refraction when transitioning between amorphous and crystalline phases. In a preferred embodiment, the material is Ge 2 Sb 2 Te 5 (GST).

[0024] The portion 10 of material is disposed on a reflector 12, wherein in this embodiment the reflector 12 is a layer of metal such as platinum or aluminium. A spacer layer 14 is sandwiched between the material 10 and the reflector 12 . A cover layer 16 is disposed on top of the material layer 10 . In this particular embodiment, the upper surface 18 of the cover layer 16 constitutes the viewing surf...

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PUM

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Abstract

A display device comprises a plurality of pixels, each pixel having a portion (10) of a solid-state, phase-change material such as germanium-antimonium-telluride (GST) or vanadium dioxide, wherein the phase-change material can be reversibly brought into an amorphous state or a crystaline state and has a refractive index that is reversibly, electrically controllable. A plurality of electrodes (14, 16) are provided, at least two of which contact said portion of material (10). A controller (19) is provided that is adapted to apply at least one voltage to said material (10), via said electrodes (14, 16), to change said refractive index. An array of such portions of material can be arranged to make a pixellated display, for example a stereoscopic display of the volumetric type.

Description

technical field [0001] The invention relates to a display device. Background technique [0002] Display technology has made considerable progress, for example in the field of portable computing and communication devices. Some display technologies, such as backlit color displays, have relatively high energy consumption and are complex to manufacture. Different technologies provide non-backlit black and white displays, but have slower switching speeds, cannot display video footage, and of course lack color. Other technologies require high drive voltages that are not easy to generate, and tend to have high energy consumption. With all of these technologies, there is also the problem of producing high resolution displays. Contents of the invention [0003] The present invention has been made in view of the above problems. [0004] Therefore, the present invention provides a display device, comprising: [0005] multiple electrodes; [0006] a portion of a solid state mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01G02F1/19G02B27/22
CPCG02F1/0147G02F2203/34G02F1/19G02F1/0105G02F1/0107G02B30/52H10N70/231
Inventor 哈里什·巴斯卡兰培曼·胡赛尼
Owner OXFORD UNIV INNOVATION LTD
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