CN103268720A

CN103268720A - Electrode type Braille displayer

Info

Publication number: CN103268720A
Application number: CN2013101511423A
Authority: CN
Inventors: 张居晓; 胡作进; 王乃和
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-27
Filing date: 2013-04-27
Publication date: 2013-08-28

Abstract

The invention provides a Braille displayer based on an electrode, and belongs to the field of Braille display. An electrical stimulation technology is adopted, namely low-frequency and medium-frequency high-voltage electronic pulses are adopted. A blind person touches the displayer with fingers, an electrical stimulation feeling is generated, and therefore the blind person recognizes Braille. The electrode type Braille displayer is composed of a Braille conversion module, a Braille information display control module and a terminal display module (as shown in the figure). The Braille conversion module is used for receiving text information or image information and converting the text information or the image information into Braille, the terminal display module is used for determining electronic pulses on an electrode, 2*3 in an electrode array layer (a plurality of electrode units) displays one side of the Braille, black solid points show that pulses are possessed, hollow points show that the pulses are not possessed, and left side points on the bottom row are used for public electrodes. The electrode type Braille displayer is simple in structure, low in manufacturing cost, good in stability in the process of Braille display, high in conversion efficiency, suitable for large-scale integrated circuit control, and capable of conveniently achieving large screen Braille display.

Description

The electric pole type Braille point word display

Technical field

The present invention relates to Braille point word display, using electrode to produce electronic impulse stimulates, and makes the blind person identify the display device of literal or image.

Background technology

China more and more payes attention to disabled person's education, and this is the embodiment of progress of social civilization.

Braille is international braille by the round dot of six projectioies is that basic structure is formed, and is to specialize in the blind person to touch the letter symbol of reading, writing.At present, the books read of blind person etc. all are the Brailles that carves solid (projection) with the braille imprinter; And when online or reading electronic book nationality, then use and read to shield software, this also is present the most frequently used method.

Some information (as music symbol, mathematical formulae etc.) can't be read aloud, and it is helpless to read to shield software.Scientific and technical personnel just should provide simple and practical Braille point word display for them.

At present, the plano-convex that domestic Braille point word display (as the Mai Tai gram) commonly used is based on the braille contact changes to design, this design often mechanical hook-up is complicated and higher to the material deformation requirement of strength, also makes its manufacturing cost remain high (point that restrains 40 sides as Mai Tai shows device price 20,000).

The Braille point word display state of the art:

1. adopt mechanical control method (as in the patent No. being the mode that adopts piezoelectric patches in the patent of CN200510105242.8).

Shortcoming: complex structure, technology is loaded down with trivial details, makes difficulty.

2. adopt electromagnetic mode control plano-convex to change (as CN1O2184662A and CN201110058989.8).

Shortcoming: be not easy to large-scale circuit and drive, just can not form the multirow screen.

3. adopt special material can realize under not having the condition of complex mechanical construction that the plano-convex of braille contact changes (adopting round trip memorial alloy thin slice as adopting one way memory alloy wire and patent CN200810047306 among the patent CN03256935.1).

Shortcoming: a little less than alloy material exists the slow and physical strength of shape state variation, so the refreshing frequency of braille display screen is low and durability is low, the price height, manufacturing cost is higher and be not easy to promote.

Adopt the difference of temperature to represent braille (as CN 102819975A).

Shortcoming: temperature can not fast rise and decline, and in time display effect is bad, and finger is bigger to the face of temperature perceptibility, so this device finger perceptibility is bad.

At present, the relevant report of still not having multirow braille display.

Summary of the invention

The object of the present invention is to provide a kind of Braille point word display, be that a kind of dependence electrode produces the electronic impulse stimulation, make the blind person identify the display device of literal or image, for the crowd of dysopia provides a kind of reading electronic literature instrument of (comprising literal, image).

1. the electrode of having created the electrical acupuncture field is used for the Braille demonstration.

2. the electric pole type Braille point word display comprises conversion Braille module, braille information display control module and terminal display module.Conversion Braille module is used for receiving Word message or image information, and converts this literal information or image information to Braille, according to the directly corresponding Braille that shows of lining by line scan.

3. the terminal display module is for the electronic impulse of determining according to this braille contact on the electrode, the salient point of representing the braille contact when electro photoluminescence sense (electronic impulse is namely arranged) is wherein arranged, represent the flat spot of braille contact during no electro photoluminescence sense (electronic impulse is namely arranged), and can regulate the electronic impulse size as required.

4. electric pole type Braille point word display, it is characterized in that: this electrod-array layer is made up of a plurality of electrode units, and per 2 * 4 electrode units constitute a square, 2 * 3rd, show braille one side (as the braille electrode among Fig. 1), the solid dot black table has pulse, and hollow dots represents there is not pulse; The most descending left side point is used for public electrode (as the public electrode of Fig. 1), is the common return of all the other 7 electrodes of a square, and corresponding point just produces electronic impulse; The most descending the right point is used for expression cursor position (as the cursor electrode of Fig. 1).

Outstanding feature of the present invention:

1. employing electrode, the nervous organ of irritate human skin, the nerve endings that makes blind person's armrest refer to is felt Braille point position.

2. the electrode technology in the acupuncture is comparatively ripe, is conducive to reduce the cost of electrical acupuncture Braille point word display.

3. two kinds of thinkings, Chinese character, symbol etc. are translated into braille and are shown, braille itself adopts and lines by line scan, and realize the demonstration of multirow braille.

4. image can be converted into black white image, changes into Braille then, just can realize the demonstration of the Braille of black white image.

Description of drawings

Fig. 1 is electric pole type Braille point word display principle assumption diagram.

Embodiment

Describe embodiments of the invention below in detail, the embodiment that is described with reference to the drawings is exemplary, only is used for explaining the present invention, and can not be interpreted as limitation of the present invention.

Native system comprises three modules, is respectively: conversion Braille module, braille information display control module and terminal display module.

Wherein change the Braille functions of modules and accept Word message or image information, through microprocessor processes, convert Word message or image information to Braille, according to the directly corresponding Braille that shows of lining by line scan.

Braille information display control module comprises following components:

1. level shifting circuit: level shifting circuit is realized the conversion of computing machine and decoding circuit plate rs 232 serial interface signal level.

2. decoding circuit: decoding circuit receives from the braille information of computing machine and is decoded into the IO signal.

3.MOS gating switch: the MOS gating switch is the break-make control that realizes under the control of decoding circuit the pulse signal of trigger electrode.

4. pulse producer: pulse producer is formed the continuous impulse oscillatory circuit by 555 timer chips and its peripheral circuit.By regulate correlation parameter can change the width of output pulse and frequency with the pulse that produces two different frequencies and width to satisfy the needs of basic function.In addition, thus satisfy different user to the demand of different pole strengths by the regulating impulse amplitude.

Terminal display module: generate many group pulses and be loaded on the electrode formation electronic impulse respectively according to regulating parameter (frequency, amplitude).Have pulse that the electro photoluminescence sense is just arranged, the blind person is the salient point of energy perception braille contact just, represents the flat spot of braille contact during no electro photoluminescence sense (electronic impulse is namely arranged).

Of the present invention simple in structure, the good stability of low cost of manufacture and braille procedure for displaying, the conversion efficiency height, and be suitable for large scale integrated circuit control, be convenient to realize giant-screen braille Display Realization.

Microprocessor connects external informations such as Internet resources among the present invention by USB interface, and is more convenient.

The electric pole type Braille point word display also has a control panel, and its basic function comprises:

1. frequency control, amplitude control

2. line feed (lastrow, next line)

3. (page up, following one page) skips

4. homepage, endpage

5. get back to editor position etc.

Claims

2. the electric pole type Braille point word display comprises conversion Braille module, braille information display control module and terminal display module.

3. conversion Braille module is used for receiving Word message or image information, and converts this literal information or image information to Braille, according to the directly corresponding Braille that shows of lining by line scan.

4. the terminal display module is for the electronic impulse of determining according to this braille contact on the electrode, the salient point of representing the braille contact when electro photoluminescence sense (electronic impulse is namely arranged) is wherein arranged, represent the flat spot of braille contact during no electro photoluminescence sense (electronic impulse is namely arranged), and can regulate the electronic impulse size as required.

5. electric pole type Braille point word display, it is characterized in that: this electrod-array layer is made up of a plurality of electrode units, and square of per 2 * 4 electrode units formation, and 2 * 3rd, show braille one side (as the braille electrode among Fig. 1), the solid dot black table has pulse, and hollow dots represents there is not pulse; The most descending left side point is used for public electrode (as the public electrode of Fig. 1), and public electrode is the common return of other 7 electrodes in the square, forms electrode, and corresponding point just produces electronic impulse; The most descending the right point is used for expression cursor position (as the cursor electrode of Fig. 1).