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a vo-based 2 Braille display device with double-layer actuated film

A display device, VO2 technology, applied in teaching aids, educational aids, instruments, etc., can solve problems such as complex mechanical structure, achieve fast response, and enhance shrinkage ability.

Active Publication Date: 2022-06-07
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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  • a vo-based <sub>2</sub> Braille display device with double-layer actuated film
  • a vo-based <sub>2</sub> Braille display device with double-layer actuated film
  • a vo-based <sub>2</sub> Braille display device with double-layer actuated film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0051] (1) Stick 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 turn on the 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) Put VO 2 Nanorods 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 the nanorods and graphene as the solute to the volume of N,N-dimethylacetamide was 5 mg:1 mL. Next, drop 4 ml of the dispersion liquid on the glass substrate 53 under the action of the electric field in step (1), and dry it...

Embodiment 2

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

Embodiment 3

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

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Abstract

The invention discloses a VO based 2 A braille display device with a double-layer actuated film relates to the technical field of braille display. The invention includes a braille display assembly and a light source assembly; the braille display assembly includes a cover panel, a braille display unit, and a substrate. VO 2 The actuation layer and the support layer, the support layer is an expanded polymer layer; the cover panel is located on the substrate, and a through hole is opened on the surface of the cover panel, and the key is located in the through hole, VO 2 The actuation layer is located on the surface of the substrate; the light source component includes a light source, the light source is located under the key position, and the key position responds under the light source and protrudes toward the top of the through hole. The beneficial effect of the present invention is that: the light source control button responds to the protrusion, and Braille information is displayed on the protrusion, and at the same time, fast response and refreshing can provide smooth reading.

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 actuated film. Background technique [0002] As of 2019, the number of blind people in my country is about 17 million, and the number of blind people is increasing every year by about 450,000. It is the country with the largest number of blind people in the world. At present, there are few Braille book publishers in my country. For books with a single type 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, and the circulation capacity of Braille books is poor. It is difficult for the blind to obtain the required Braille books accurately. [0003] Braille display devices, or braille terminals and braille displays, are electronic and mechanical devices that can output information in the form of braille. The speci...

Claims

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Application Information

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Patent Type & Authority Patents(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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