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Braille display device based on temperature control

A display device and temperature control technology, applied in semiconductor/solid-state device parts, instruments, semiconductor devices, etc., can solve the problems affecting the frequency change and durability of braille display screens, high manufacturing costs of braille display screens, and high prices of alloy materials , to achieve the effect of simple structure, prevention of heat transfer and low manufacturing cost

Inactive Publication Date: 2014-06-18
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alloy materials have the disadvantages of slow shape state change and weak mechanical strength, which seriously affect the frequency conversion and durability of Braille displays
In addition, due to the high price of alloy materials, the manufacturing cost of Braille display screens is high and it is not easy to promote

Method used

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  • Braille display device based on temperature control
  • Braille display device based on temperature control
  • Braille display device based on temperature control

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Embodiment Construction

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention discloses a Braille display device based on temperature control, belonging to the field of Braille display. A Braille display screen in the device comprises a temperature-indication display array layer composed of multiple temperature-indication display units, and a semiconductor chilling plate layer composed of multiple semiconductor chilling plates, wherein the lower surface of each temperature-indication display unit is provided with one semiconductor chilling plate; moreover, the Braille display device determines the set temperature of the cold end of each semiconductor chilling plate according to the Braille contacts corresponding to character information, and compares the current temperature of the cold end of the semiconductor chilling plate with the set temperature, by PID (Proportion Integration Differentiation) regulation, a PWM (Pulse-Width Modulation) generator generates multiple groups of PWM pulses and respectively loads the pulses at two ends of each semiconductor chilling plate, thus, cold state or hot state of corresponding temperature-indication display unit is displayed, wherein when the temperature-indication unit is extremely cold, the flat points of the Braille contacts are indicated, and when the temperature-indication unit is extremely hot, the convex points of the Braille contacts are indicated. The Braille display device is simple in structure, low in manufacturing cost, excellent in stability of Braille display process and high in conversion efficiency.

Description

technical field [0001] The invention relates to a braille display device, in particular to a temperature-controlled braille display device. Background technique [0002] People with severe visual impairment or blindness are quite inconvenient when reading the Internet or other electronic information due to physical defects. It is urgent for the society to provide them with simple and practical Braille e-readers. The commonly used braille readers are all designed based on the plano-convex changes of the braille contacts. This design often has complex mechanical devices and requires high deformation strength of materials, and the manufacturing cost remains high. [0003] Traditionally, the braille display adopts a mechanical control method. For example, in the patent No. CN200510105242.8, a piezoelectric sheet is used to control and display braille. This method has a complex structure, cumbersome process, and difficult production. [0004] With the advancement of material tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L23/367G09B21/00
CPCH01L2924/0002
Inventor 汪成亮张智海陈俊宏
Owner CHONGQING UNIV
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