CN102819975B - Braille display device based on temperature control - Google Patents
Braille display device based on temperature control Download PDFInfo
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- CN102819975B CN102819975B CN201210331804.0A CN201210331804A CN102819975B CN 102819975 B CN102819975 B CN 102819975B CN 201210331804 A CN201210331804 A CN 201210331804A CN 102819975 B CN102819975 B CN 102819975B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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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
The present invention relates to a kind of braille display unit, relate in particular to a kind of based on temperature controlled braille display unit.
Background technology
Eyesight be badly damaged or the crowd of blinding due to the defect on physical function, the inconvenience that seems suitable in the time reading the Internet or other electronic information, needs society badly for they provide simple and practical braille electronic reader.Existing conventional braille reader is all that the plano-convex based on braille contact changes to design, and this design often mechanical device is complicated and higher to material deformation requirement of strength, and manufacturing cost is high.
Traditionally, braille display screen adopts mechanical control method, as the mode control that adopts piezoelectric patches in the patent that is CN200510105242.8 in the patent No. shows braille, and this mode complex structure, technique is loaded down with trivial details, makes difficulty.
Along with the progress of material science and technology, the plano-convex that adopts special material can realize braille contact under the condition that there is no complicated mechanical structure changes.Change such as adopting one way memory alloy wire to control braille contact in the patent that is CN03256935.1 in the patent No., the patent that the patent No. is CN200810047306 has been improved material and has been adopted round trip memorial alloy thin slice control braille contact to change.But alloy material exists the shortcoming that shape state variation is slow and mechanical strength is weak, this has had a strong impact on Frequency and the durability of braille display screen.In addition,, because alloy material price is higher, make the manufacturing cost of braille display screen higher and be not easy to promote.
Summary of the invention
The present invention is intended to solve the technical problem existing in prior art, propose to special innovation a kind of based on temperature controlled braille display unit, the aobvious unit acting in conjunction of semiconductor chilling plate and temperature has realized based on temperature controlled braille and having shown, simple in structure and low cost of manufacture.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of based on temperature controlled braille display unit, comprise microprocessor and braille display screen, this microprocessor is used for receiving Word message, and convert this Word message to braille contact, show by this braille display screen, it is characterized in that: also comprise that PWM generator and this braille display screen comprise the aobvious array layer (1) of temperature and semiconductor refrigerating lamella (2), this temperature shows that array layer (1) is made up of the aobvious unit (5) of multiple spaced temperature and this semiconductor refrigerating lamella (2) is made up of multiple spaced semiconductor chilling plates (8), the lower surface of each aobvious unit (5) of temperature is provided with a semiconductor chilling plate (8) and connects with the cold junction of corresponding semiconductor chilling plate (8),
This microprocessor is for determining the design temperature of each semiconductor chilling plate cold junction according to this braille contact, this PWM generator generates many group pwm pulses according to this design temperature and is carried in respectively cold junction and the hot junction of each semiconductor chilling plate, recently change at direction and the duty of the pwm pulse at each semiconductor chilling plate two ends the cold and hot demonstration that corresponding temperature shows unit by controlled loading, when wherein the aobvious unit of temperature is the cold utmost point, represent the flat spot of braille contact, the aobvious unit of temperature represents the salient point of braille contact while being thermoae.
The present invention recently changes at pwm pulse direction and the duty at semiconductor refrigerating lamella two ends the cold and hot demonstration that temperature shows unit by controlled loading, and while being the cold utmost point in the aobvious unit of temperature, represent the flat spot of braille contact, the aobvious unit of temperature represents the salient point of braille contact while being thermoae, realize based on temperature controlled braille and having shown, the simple in structure and low cost of manufacture of the present invention.
Should also comprise temperature sensor, analog to digital converter and PID adjuster based on temperature controlled braille display unit, wherein this temperature sensor is for gathering the Current Temperatures of semiconductor chilling plate cold junction and sending to this analog to digital converter;
This analog to digital converter is for converting the Current Temperatures of semiconductor chilling plate cold junction digital signal form to and send to this microprocessor;
This microprocessor is for calculating the temperature deviation between Current Temperatures and its design temperature of semiconductor chilling plate cold junction and sending to this PID adjuster;
This PID adjuster is for obtaining and regulate parameter and send to PWM generator according to this temperature deviation;
This PWM generator is also carried in respectively cold junction and the hot junction of each semiconductor chilling plate (8) for generate many group pwm pulses according to this adjusting parameter.The present invention has considered the Current Temperatures of semiconductor chilling plate cold junction in the cold and hot procedure for displaying of the aobvious unit of temperature, and the cold and hot demonstration that makes the aobvious unit of temperature more accurately, stable and conversion efficiency is higher.
The hot junction of each semiconductor chilling plate (8) is provided with radiating fin (4), has improved radiating efficiency.
This temperature shows between the aobvious unit (5) of temperature of array layer (1) and is provided with heat insulation grid (7), can prevent the transfer of heat between the aobvious unit of temperature, makes the cold and hot demonstration of the aobvious unit of temperature more obvious.
Should also comprise the control substrate (3) that is arranged at semiconductor refrigerating lamella downside based on temperature controlled braille display unit, it is upper that this microprocessor, temperature sensor, analog to digital converter and PID adjuster and wiring thereof are all integrated in this control substrate (3), and the radiating fin (4) in each semiconductor chilling plate (8) hot junction passes from this control substrate (3).Control substrate and played the effect of supporting, and the radiating fin in each semiconductor chilling plate hot junction passes the further radiating efficiency that improved from this control substrate.
This temperature shows array layer (1) and is made up of 18*3 the aobvious unit (5) of temperature, and a square of every 2*3 temperature aobvious unit (5) formation, has met current numerous users' operating habit, is convenient to the popularization of product.
In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows:
1, the present invention recently changes at pwm pulse voltage direction and the duty at semiconductor refrigerating lamella two ends the cold and hot demonstration that temperature shows unit by controlled loading, and while being the cold utmost point in the aobvious unit of temperature, represent the flat spot of braille contact, the aobvious unit of temperature represents the salient point of braille contact while being thermoae, realize thus based on temperature controlled braille and having shown, the simple in structure and low cost of manufacture of the present invention; In addition, considered the Current Temperatures of semiconductor chilling plate cold junction in the cold and hot procedure for displaying of the aobvious unit of temperature, the cold and hot demonstration that makes the aobvious unit of temperature more accurately, stable and conversion efficiency is higher;
2, the hot junction of each semiconductor chilling plate is provided with radiating fin, has improved radiating efficiency;
3, between the aobvious unit of the temperature of the aobvious array layer of this temperature, be provided with heat insulation grid, can prevent the transfer of heat between the aobvious unit of temperature, make the cold and hot demonstration of the aobvious unit of temperature more obvious;
4, adopt control substrate to play the effect of supporting, and the radiating fin in each semiconductor chilling plate hot junction pass the further radiating efficiency that improved from this control substrate;
5, the aobvious array layer of this temperature is made up of 18*3 the aobvious unit of temperature, and every 2*3 aobvious square of cell formation of temperature, has met current numerous users' operating habit, is convenient to the popularization of product.
Brief description of the drawings
Fig. 1 is the perspective view of braille display screen of the present invention;
Fig. 2 is the end view of braille display screen in the present invention;
Fig. 3 is the vertical view of braille display screen in the present invention;
Fig. 4 is the circuit theory diagrams of controlling substrate in the present invention;
Fig. 5 is the first design sketch of braille display screen in the present invention;
Fig. 6 is the second design sketch of braille display screen in the present invention.
In figure: 1. the aobvious array layer of temperature, 2. semiconductor refrigerating lamella, 3. controls substrate, 4. radiating fin, the 5. aobvious unit of temperature, 6. braille shows square, 7. heat insulation grid, 8. semiconductor chilling plate.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " longitudinally ", " laterally ", " on ", orientation or the position relationship of the instruction such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
Should be formed by braille display screen and control substrate 3 based on temperature controlled braille display unit, as shown in Fig. 1～2, this braille display screen comprises that the aobvious array layer 1 of temperature, semiconductor refrigerating lamella 2 and radiating fin 4 form, the aobvious array layer 1 of this temperature is made up of the aobvious unit 5 of multiple spaced temperature and this semiconductor refrigerating lamella 2 is made up of multiple spaced semiconductor chilling plates 8, and the lower surface of each aobvious unit 5 of temperature is provided with a semiconductor chilling plate 8 and connects with the cold junction of corresponding semiconductor chilling plate 8.The hot junction of each semiconductor chilling plate 8 is provided with radiating fin 4, has improved radiating efficiency.
In addition, on this control substrate 3, be integrated with this microprocessor, PWM generator, temperature sensor, analog to digital converter, PID adjuster and wiring thereof, and this control substrate 3 is arranged at semiconductor refrigerating lamella 2 downsides, the radiating fin 4 in each semiconductor chilling plate 8 hot junctions passes in this substrate 3, has further improved radiating efficiency.
As shown in Figure 3, the temperature of the aobvious array layer 1 of this temperature is provided with heat insulation grid 7 between aobvious unit 5, prevents the transfer of heat between the aobvious unit of temperature, makes the cold and hot demonstration of the aobvious unit of temperature more obvious.
As shown in Figure 4, microprocessor receives Word message and converts this Word message to braille contact, and determines the set temperature of each semiconductor chilling plate cold junction according to this braille contact.Temperature sensor gathers the Current Temperatures of semiconductor chilling plate cold junction and sends to analog to digital converter, this analog to digital converter converts the Current Temperatures of semiconductor chilling plate cold junction digital signal form to and sends to microprocessor, temperature deviation between Current Temperatures and its design temperature of microprocessor calculating semiconductor chilling plate cold junction also sends to PID adjuster, PID adjuster obtains and regulates parameter and send to PWM generator according to this temperature deviation, this PWM generator generates many group pwm pulses according to this adjusting parameter and is carried in respectively cold junction and the hot junction of each semiconductor chilling plate, recently change at direction and the duty of the pwm pulse at each semiconductor chilling plate two ends the cold and hot demonstration that corresponding temperature shows unit by controlled loading, when wherein the aobvious unit of temperature is the cold utmost point, represent the flat spot of braille contact, the aobvious unit of temperature represents the salient point of braille contact while being thermoae.The present invention has considered the Current Temperatures of semiconductor chilling plate cold junction in the cold and hot procedure for displaying of the aobvious unit of temperature, and the cold and hot demonstration that makes the aobvious unit of temperature more accurately, stable and conversion efficiency is higher.
In order to meet current numerous users' operating habit, be convenient to the popularization of product, in the present invention, the aobvious array layer 1 of this temperature is that 18 row * 3 are listed as by 18*3() the aobvious unit A of individual temperature forms, and every 2*3(is that 2 row * 3 are listed as) the aobvious square 6 of cell formation of individual temperature.In addition, in the present invention, microprocessor is by external informations such as USB interface connecting Internet resources, more convenient.
In the first embodiment of the present invention, this temperature shows unit aluminium Heat Conduction Material processed, this microprocessor is selected the MCS-51 family chip of Intel company, it is the platinum resistance temperature sensor of PT1000 that this temperature sensor is selected model, these heat insulation grid adopt ultra-thin heat-barrier material FiberGC-10, and semiconductor chilling plate is selected the semiconductor chilling plate of TEC1-00715T125 type.
As shown in Fig. 5～6, the little box indicating temperature of black shows the thermoae of unit, the i.e. salient point of braille contact; The cold utmost point of the aobvious unit of colourless little box indicating temperature, i.e. the flat spot of braille contact, in Fig. 5, whole braille display unit represents " I " in braille; In Fig. 6, whole braille display unit represents " also I want also " in braille.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (5)
1. one kind based on temperature controlled braille display unit, it is characterized in that: comprise microprocessor, braille display screen, temperature sensor, analog to digital converter, PID adjuster and PWM(pulse width modulation) generator, braille display screen comprises the aobvious array layer (1) of temperature and semiconductor refrigerating lamella (2), this temperature shows that array layer (1) is made up of the aobvious unit (5) of multiple spaced temperature and this semiconductor refrigerating lamella (2) is made up of multiple spaced semiconductor chilling plates (8), the lower surface of each aobvious unit (5) of temperature is provided with a semiconductor chilling plate (8) and connects with the cold junction of corresponding semiconductor chilling plate (8),
This temperature sensor is for gathering the Current Temperatures of semiconductor chilling plate cold junction and sending to this analog to digital converter;
This analog to digital converter is for converting the Current Temperatures of semiconductor chilling plate cold junction digital signal form to and send to this microprocessor;
This microprocessor is used for receiving Word message, and converts this Word message to braille contact information, and the temperature deviation between Current Temperatures and its design temperature of calculating semiconductor chilling plate cold junction also sends to this PID adjuster;
This PID adjuster is for obtaining and regulate parameter and send to PWM generator according to this temperature deviation;
This PWM generator is also carried in respectively cold junction and the hot junction of each semiconductor chilling plate (8) for generate many group pwm pulses according to this adjusting parameter, recently change at direction and the duty of the pwm pulse at each semiconductor chilling plate (8) two ends the cold and hot demonstration that corresponding temperature shows unit (5) by controlled loading, when wherein warm aobvious unit (5) is for the cold utmost point, represent the flat spot of braille contact, the aobvious unit (5) of temperature represents the salient point of braille contact while being thermoae.
2. according to claim 1 based on temperature controlled braille display unit, it is characterized in that: the hot junction of each semiconductor chilling plate (8) is provided with radiating fin (4).
3. according to claim 1 based on temperature controlled braille display unit, it is characterized in that: this temperature shows between the aobvious unit (5) of temperature of array layer (1) and is provided with heat insulation grid (7).
4. according to claim 1 based on temperature controlled braille display unit, it is characterized in that: also comprise the control substrate (3) that is arranged at semiconductor refrigerating lamella downside, it is upper that this microprocessor, temperature sensor, analog to digital converter and PID adjuster and wiring thereof are all integrated in this control substrate (3), and the radiating fin (4) in each semiconductor chilling plate (8) hot junction passes from this control substrate (3).
5. according to claim 1 based on temperature controlled braille display unit, it is characterized in that: this temperature shows array layer (1) and is made up of 18*3 the aobvious unit (5) of temperature, and every 2*3 the aobvious unit (5) of temperature forms a square (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210331804.0A CN102819975B (en) | 2012-09-10 | 2012-09-10 | Braille display device based on temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210331804.0A CN102819975B (en) | 2012-09-10 | 2012-09-10 | Braille display device based on temperature control |
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| Publication Number | Publication Date |
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| CN102819975A CN102819975A (en) | 2012-12-12 |
| CN102819975B true CN102819975B (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210331804.0A Expired - Fee Related CN102819975B (en) | 2012-09-10 | 2012-09-10 | Braille display device based on temperature control |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104036672A (en) * | 2014-06-19 | 2014-09-10 | 游启麟 | Portable braille alphabet touch-pronouncing device with long battery life and low cost |
| CN104656892B (en) * | 2015-01-30 | 2017-06-09 | 上海理工大学 | Perceive reading device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2410688Y (en) * | 2000-02-18 | 2000-12-13 | 王大鹏 | Braille alphabet display device |
| DE10226746A1 (en) * | 2002-06-14 | 2003-12-24 | Wolfgang Wuenschmann | Mechanical display comprises picture element directly or indirectly produced with actuators made from expandable polymer networks with phase transfer behavior and phase transfer points which can be exceeded or not reached in controlled way |
| CN101133432A (en) * | 2005-03-01 | 2008-02-27 | 法国原子能委员会 | Method and devices for transmitting tactile data |
| CN101907922A (en) * | 2009-06-04 | 2010-12-08 | 智点科技（深圳）有限公司 | Touch system |
-
2012
- 2012-09-10 CN CN201210331804.0A patent/CN102819975B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2410688Y (en) * | 2000-02-18 | 2000-12-13 | 王大鹏 | Braille alphabet display device |
| DE10226746A1 (en) * | 2002-06-14 | 2003-12-24 | Wolfgang Wuenschmann | Mechanical display comprises picture element directly or indirectly produced with actuators made from expandable polymer networks with phase transfer behavior and phase transfer points which can be exceeded or not reached in controlled way |
| CN101133432A (en) * | 2005-03-01 | 2008-02-27 | 法国原子能委员会 | Method and devices for transmitting tactile data |
| CN101907922A (en) * | 2009-06-04 | 2010-12-08 | 智点科技（深圳）有限公司 | Touch system |
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| CN102819975A (en) | 2012-12-12 |
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