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Braille display device based on temperature control

A display device and temperature control technology, applied in the directions of instruments, semiconductor devices, circuits, etc., can solve the problems affecting the variable frequency and durable performance of the braille display screen, the high manufacturing cost of the braille display screen, and the high price of alloy materials, and achieve a simple structure, The effect of preventing the transfer of heat and reducing the manufacturing cost

Inactive Publication Date: 2012-12-12
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] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, not It indicates or implies that the pointe...

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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 braille display device based on temperature control. Background technique [0002] People with severely impaired eyesight or blindness are quite inconvenient when reading the Internet or other electronic information due to physical defects, and there is an urgent need for society to provide them with simple and practical Braille e-readers. The existing commonly used braille readers are all designed based on the plano-convex changes of the braille contacts. Such designs are often complicated in mechanical devices and require high deformation strength of materials, and the manufacturing cost remains high. [0003] Traditionally, the braille display screen adopts a mechanical control method. For example, in the patent No. CN200510105242.8, a piezoelectric film is used to control and display Braille. This method has a complicated structure, a cumbersome process and a difficult production. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B21/00H01L23/367
CPCH01L2924/0002H01L2924/00
Inventor 汪成亮张智海陈俊宏
Owner CHONGQING UNIV
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