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Braille display device based on VO2 double-layer actuating film

A display device, VO2 technology, applied in teaching aids, educational tools, instruments, etc., can solve problems such as complex mechanical structures, and achieve smooth reading, fast response and refreshing effects

Active Publication Date: 2021-05-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the display of a character in the prior art needs the support of multiple piezoelectric units, and the mechanical structure is complicated.

Method used

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  • Braille display device based on VO2 double-layer actuating film
  • Braille display device based on VO2 double-layer actuating film
  • Braille display device based on VO2 double-layer actuating film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Key 521 (VO 2 Double-layer actuation film) preparation method, bond position 521 includes VO 2 The actuation layer 5211 and the support layer 5212, where the support layer 5212 is an expanded polymer layer, specifically include the following steps:

[0051] (1) Paste the copper foil tape with a size of 25mm×75mm on the glass sheet 2, fix the wire 4 on the copper foil 1 with silver paste to form an electrode, and connect a high-voltage power supply to apply an external electric field, wherein the electric field strength is 1000V / cm, such as figure 1 shown.

[0052] (2) will VO 2 Nanorod and graphene hybrid, VO 2 The mass ratio of nanorods to graphene is 1:1, dispersed in N,N-dimethylacetamide to form a dispersion, VO 2 The ratio of the mass of nanorods and graphene as a solute to the volume of N,N-dimethylacetamide is 5 mg:1 mL. Next, 4ml of dispersion liquid is dripped on the glass substrate 53 under the electric field in step (1), and dried on a heating platform...

Embodiment 2

[0056] The difference between this embodiment and Embodiment 1 is: VO 2 The mass ratio of nanorods to graphene is 2:1.

Embodiment 3

[0058] The difference between this embodiment and embodiment 1 is that the expanded polymer is PI.

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Abstract

The invention discloses a Braille display device based on a VO2 double-layer actuating film, and relates to the technical field of Braille display. The Braille display device comprises a Braille display assembly and a light source assembly. The braille display assembly comprises a covering panel, a braille display unit and a substrate, the braille display unit comprises a key position, the key position comprises a VO2 actuating layer and a supporting layer which are overlapped, and the supporting layer is an expansion polymer layer; the covering panel is located on the substrate, a through hole is formed in the surface of the covering panel, the key position is located in the through hole, and the VO2 actuating layer is located on the surface of the substrate; and the light source assembly comprises a light source, the light source is located below the key position, and the key position responds under the light source and protrudes towards the upper portion of the through hole. The beneficial effects are that the light source controls the button to respond to the projection, the projection displays braille information, rapid response and refreshing are realized, and smooth reading can be provided.

Description

technical field [0001] The invention relates to the technical field of braille display, in particular to a VO-based 2 Braille display device with double-layer actuated film. Background technique [0002] As of 2019, the number of blind people in my country is about 17 million, and the number is increasing by about 450,000 every year. It is the country with the largest number of blind people in the world. At present, the number of Braille book publishing houses in my country is small, and the publication of Braille books is mainly concentrated in the teaching of skills. Books For books with a single category and the same content, Braille books usually require several times the volume and dozens of times the price; there are few institutions that can obtain Braille books, the circulation capacity of Braille books is poor, and it is difficult for the blind to accurately obtain the Braille books they need. [0003] Braille display devices, or Braille terminals and Braille displa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B21/00
CPCG09B21/004
Inventor 胡颖王枭杰潘家乐沈锦杰常龙飞刘家琴吴玉程
Owner HEFEI UNIV OF TECH
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