Braille display device based on electrorheological fluid

Abstract

The invention belongs to the field of special equipment manufacturing for the disabled people, specifically, a braille display device based on an electrorheological fluid. The braille display device comprises a power supply unit, a control unit, a display unit and a protection unit, wherein the power supply unit supplies power for the control unit, the display unit and the protection unit; the power supply unit is formed by a power supply module; the power supply module is provided with two input ports and three output ports; the control unit is composed of a braille input module, an MCU module, a decoding module, a latch module and an optocoupler isolation module; the display unit is a lattice material formed by weaving of high-strength non-conductive anti-permeation fibers; and the protection unit comprises a current sensor and an alarm device.

Description

technical field [0001] The invention belongs to the field of manufacturing special equipment for disabled persons, and in particular relates to a braille display device based on electrovariable fluid. Background technique [0002] Reading for the blind is a special education issue for the disabled: learning and education are necessary for all human beings, and education fairness and the right to education are the basic rights of all human beings. The congenital defects of the blind make it impossible for the blind to read any image-related media such as normally printed books, drawing books, film and television programs. In order to solve the problem of reading for the blind, the Frenchman Louis Blair created Braille in 1824. Braille, or Braille or embossed characters, is a text specially designed for the blind and perceived by touch. Braille is a type of phonetic writing. Each block of Braille is composed of six dots. The left side is 123 from top to bottom, and the right ...

AI Technical Summary

Problems solved by technology

[0002] Reading for the blind is a special education issue for the disabled: learning and education are necessary for all human beings, and education fairness and the right to education are the basic rights of all human beings. Congenital defects of the blind, which prevent the blind from reading normally printed books, drawing books, film and television programs and any image-related media media

[0013] It can be seen from Table 1 that the voice-based braille display is cheap and the device is simple, but it cannot display images. Blind people will damage their hearing if they listen for a long time, and they are easily disturbed by the surrounding sound; the piezoelectric ceramic braille display is fast, but the structure of the device is complicated. The structure of memory alloy braille display is simple, but the rate of temperature change is slow, so the real-time performance of the device is poor; Braille displays require air pumps, complex devices, large volume, and inconvenient to carry; electrical stimulation braille displays are small in size and simple in structure, but each person or the same person has different sensitivity at the fingertips at different times, so the reliability of the device is poor, and it cannot Display images; the structure of the temperature-controlled braille display is novel, but the temperature change rate is slow, and the real-time performance of the system is poor

Images