CN110033674A - Tactile sense reproduction rotary self-locking formula braille dot matrix display device - Google Patents
Tactile sense reproduction rotary self-locking formula braille dot matrix display device Download PDFInfo
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- CN110033674A CN110033674A CN201910045386.0A CN201910045386A CN110033674A CN 110033674 A CN110033674 A CN 110033674A CN 201910045386 A CN201910045386 A CN 201910045386A CN 110033674 A CN110033674 A CN 110033674A
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- bottom plate
- driving unit
- point driving
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- 239000011159 matrix material Substances 0.000 title claims abstract description 14
- 230000015541 sensory perception of touch Effects 0.000 title claims abstract description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000033001 locomotion Effects 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000004438 eyesight Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B21/00—Teaching, or communicating with, the blind, deaf or mute
- G09B21/001—Teaching or communicating with blind persons
- G09B21/003—Teaching or communicating with blind persons using tactile presentation of the information, e.g. Braille displays
- G09B21/004—Details of particular tactile cells, e.g. electro-mechanical or mechanical layout
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- User Interface Of Digital Computer (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display devices.Including bottom plate, middle plate, touch tablet and single-point driving unit, bottom plate, middle plate, touch tablet is from top to bottom sequentially connected by passing through the pin shaft of respective pin shaft hole, touch tablet, middle plate, bottom plate surrounds the space for being used to install single-point driving unit of inner hollow jointly, single-point driving unit includes contact pilotage, rotary body, permanent magnet, pedestal, base center pin and base edge pin, the pin of single-point driving unit bottom two is each passed through corresponding two pin bores of bottom plate and is fixed on bottom plate bottom surface, rotary motion is changed into linear motion by being threadedly coupled with rotary body by upper part contact pilotage, and the location hole of touch tablet is passed through to realize the raised and self-locking of braille point.The present invention has the characteristics that compact-sized, self-locking and each single-point driving unit independent control, and large area, intensive braille lattice arrangement may be implemented, provide hardware supported for braille and figure tactile display.
Description
Technical field
The present invention relates to tactile display technology fields, aobvious more particularly to a kind of tactile sense reproduction rotary self-locking formula braille dot matrix
Showing device.
Background technique
According to the World Health Organization (WHO) in population in the world data statistics in 2010 the results show that in worldwide,
The damage that about 2.85 hundred million people have eyesight different degrees of accounts for wherein damaging more serious blind person's quantity about 39,000,000
The 13.7% of vision impairment sum.And the country that China is most as population in the world, while being also that world blind person quantity is most
Country.The exacerbation of growing population and social senilization's situation, people's likes the thin of eye eyeshield consciousness, while in medical treatment
The problems such as aspect lacks the ophthalmic medical personnel of profession, and distribution of the medical resource between city is uneven.With such case
Increasingly develop, arrive the year two thousand twenty, Chinese blind person's sum will expand 4 times.
Due to visually impaired, blind person can only experience extraneous information by the sense of hearing and tactile.Currently, blind person is mainly still
Books printed in braille are touched by finger to learn, and traditional books printed in braille information delay and not portable.With the development of the times and
Science and technology progress, for improve blind person reading and education the problem of, be both to their rights respect and social equity justice
The justice that should have, be badly in need of a kind of accessible knowledge, information reading device.
Domestic and international researcher have developed various drive forms braille point show device, also have part achievement be converted to towards
The product in market, but the problems such as there are still for example power consumption is larger and can not be popularized because of at high price always.Therefore, band is researched and developed
There is the braille dot matrix display device for the features such as self-locking, cost is relatively cheap, small in size, portable, opening for device is shown for braille point
Hair has very important value.
Summary of the invention
In order to solve the problems, such as background technique, the present invention provides a kind of tactile sense reproduction rotary self-locking formula braille points
Battle array display device, the device provides a kind of by 8 points of the braille structure designs for a side, is easy extensive assembly, takes simultaneously
The mode of screw thread self-locking achievees the effect that low-power consumption.
The technical solution adopted by the present invention to solve the technical problems is:
The present invention includes bottom plate, middle plate, touch tablet and single-point driving unit, touch tablet, middle plate, bottom plate by across
The pin shaft of respective pin shaft hole is from top to bottom sequentially connected, touch tablet, middle plate, bottom plate surround jointly inner hollow for installing
Touch tablet, bottom plate are stretched out in the space of single-point driving unit, single-point driving unit upper end, lower end respectively.
The single-point driving unit includes contact pilotage, rotary body, permanent magnet and pedestal, and pedestal is fixed on bottom plate upper surface and is equipped with
Bottom plate groove in, base top surface is provided with center groove, is provided among the slot bottom of center groove logical equipped with base center pin
Hole, the base top surface around center groove are disposed with a circle annular sheet metal, the pedestal around annular sheet metal and center groove
In be equipped with base edge pin one end connection;In the center groove of pedestal, permanent magnet lower end is equipped with permanent magnet
In the location hole that core bar inserted base center pin one end is provided with;The base edge pin other end and the base center pin other end
It wears pedestal and bottom plate and is connected to external drive circuit;The square convex block insertion rotary body lower end that permanent magnet upper end is equipped with is provided with
Rotary body bottom square groove, rotary body upper surface is equipped with thread spindle, be set in the cavity that contact pilotage lower part is equipped with thread spindle and with
Thread spindle is connected by screw thread, and the contact pilotage circular shaft of contact pilotage upper end is movably placed in the square groove of touch tablet.
It include eight single-point driving units, eight single-point driving units are in 2*4 array distribution, i.e., in Braille display
One " side " is that unit can be optionally combined various sizes of display with one " side ", forms 8 braille touch-controls.
The installation through-hole that installation is matched with the contact pilotage of eight single-point driving units is provided among the touch tablet, installation is logical
Location hole docking of the hole mainly by square groove and positioned at square groove upper surface forms;The contact pilotage mainly by contact pilotage main body and is located at contact pilotage
The contact pilotage circular shaft of main body upper surface connects composition;The location hole clearance fit of contact pilotage circular shaft and touch tablet installation, contact pilotage main body with
The movement that rotates in a circumferential direction of square groove clearance fit installation limitation contact pilotage.
The bottom plate groove bottom surface is equipped with edge pin hole corresponding with eight single-point driving units and center pin hole,
The location hole of each bottom plate center pin hole and touch tablet is located at same axle center.
Each the base edge pin of the single-point driving unit, base center pin lower end are respectively through the edge of bottom plate
Pin bores, center pin hole are pierced by from bottom plate bottom surface.
The permanent magnetism physical efficiency is conductive.
The touch driving unit is all connected with control circuit board, and control circuit board controls electric current and flows into from base edge pin
It being flowed out through permanent magnet from base center pin, i.e., electric current is flowed into from permanent magnet center along each radial direction outflow of permanent magnet, or
It controls electric current and is flowed into from base center pin and flowed out through permanent magnet from base edge pin, is i.e. electric current is from permanent magnet lower end surface edge
It is flowed out along permanent magnet center after flowing into outer ring.Intrinsic axial magnetic field is mutually perpendicular to make permanent magnet side inside electric current and permanent magnet
Edge generates tangential Ampere force, and then drives permanent magnet axial-rotation, so that rotary body be driven to rotate.
The contact pilotage is transported the straight line up and down that the rotary motion of rotary body is changed into contact pilotage by being threadedly engaged with rotary body
It is dynamic, and screw thread self-locking structure is used between thread spindle and contact pilotage internal screw thread, there is screw thread self-locking characteristic.
Contact pilotage main body upper surface resists the upper limit of square groove top surface limitation contact pilotage linear motion, contact pilotage lower body face
Resist the lower limit of rotary body upper surface limitation contact pilotage linear motion.
The beneficial effects are mainly reflected as follows:
(1) present invention uses screw thread self-locking structure, increases reliability and stability when machine work, ensure that braille
The height of projection consistency of point, significantly reduces power consumption, and large area, intensive braille lattice arrangement may be implemented,
Hardware supported is provided for braille and figure tactile display.
(2) present invention devises single-point driving unit according to Ampere force generating principle, can drive a braille contact
It moves up and down.This single-point driving unit has the characteristics that mechanism is simple, small in size, fast response time.
Detailed description of the invention
Fig. 1 is apparatus of the present invention structure overall appearance figure.
Fig. 2 is apparatus of the present invention inside configuration installation diagram.
Fig. 3 is apparatus of the present invention structure sectional view.
Fig. 4 is single-point structure of driving unit schematic diagram of the invention.
Fig. 5 is base center pin and base edge pin configuration schematic diagram of the invention.
Fig. 6 is contact pin arrangement schematic diagram of the invention.
Fig. 7 is rotation body structure schematic diagram of the invention.
Fig. 8 is structural diagram of base plate of the invention.
Fig. 9 is touch tablet structural schematic diagram of the invention.
In figure: touch tablet 10, middle plate 20, bottom plate 30, single-point driving unit 40, contact pilotage 50, rotary body 60, permanent magnet
70, pedestal 80, base edge pin 90, base center pin 100, touch tablet lower end surface 101, location hole 102, square groove top surface
103, touch tablet pin shaft hole 104, square groove 105, bottom plate upper surface 301, bottom plate groove 302, bottom plate pin shaft hole 303, bottom plate center
Pin 304, bottom edge pin 305, contact pilotage circular shaft 501, contact pilotage main body upper surface 502, contact pilotage main body 503, contact pilotage internal screw thread
504, contact pilotage lower body face 505, thread spindle 601, rotary body upper surface 602, rotary body bottom square groove 603.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the present invention includes bottom plate 30, middle plate 20 and touch tablet 10, touch tablet 10, middle plate 20, bottom plate
30 are from top to bottom sequentially connected by pin shaft, and pin shaft sequentially passes through touch tablet pin shaft hole 104, middle plate pin shaft hole, bottom plate pin shaft
Hole 303, touch tablet lower end surface 101, middle plate 20 and bottom plate upper surface 301 surround jointly inner hollow for installing single-point
The space of driving unit 40.
As shown in Fig. 2, the invention also includes there is eight single-point driving units 40, eight single-point driving units 40 are in 2*4 times
Column distribution, i.e., one " side " in Braille display are that unit can be optionally combined various sizes of display with one " side ", form eight
Point braille touch-control.Touch tablet 10, bottom plate 30 are stretched out in eight 40 upper ends of single-point driving unit, lower end respectively.
As shown in figs. 4 and 7, single-point driving unit 40 includes contact pilotage 50, rotary body 60, permanent magnet 70 and pedestal 80, bottom
Seat 80 is fixed in the bottom plate groove 302 that 30 upper surface of bottom plate is equipped with, and 80 top surface of pedestal is provided with center groove, 70 upper end of permanent magnet
The rotary body bottom square groove 603 that square convex block insertion 60 lower end of rotary body being equipped with is provided with, 60 upper surface of rotary body is equipped with thread spindle
601, thread spindle 601 is set in the cavity that 50 lower part of contact pilotage is equipped with and is connected with thread spindle 601 by screw thread, 50 upper end of contact pilotage
Circular shaft 501 is movably placed in the square groove of touch tablet 10.
Such as Fig. 3 and as shown in figure 5,80 top surface of pedestal is provided with center groove, it is provided among the slot bottom of center groove the bottom of equipped with
The through-hole of seat center pin 100,80 top surface of pedestal around center groove are disposed with a circle annular sheet metal, annular sheet metal and
The one end for the base edge pin 90 being equipped in pedestal 80 around center groove connects;Permanent magnet 70 is in pedestal 80
In heart groove, in the location hole that 100 one end of core bar inserted base center pin that 70 lower end of permanent magnet is equipped with is provided with;Base edge
90 other end of pin and 100 other end of base center pin wear pedestal 80 and bottom plate 30 and are connected to external drive circuit.
As shown in fig. 6, the main contact pilotage circular shaft 501 by contact pilotage main body 503 and positioned at 503 upper surface of contact pilotage main body of contact pilotage 50
Connection composition;The location hole clearance fit of contact pilotage circular shaft 501 and touch tablet is installed, contact pilotage main body 503 and 105 clearance fit of square groove
The movement that rotates in a circumferential direction of installation limitation contact pilotage 70.
As shown in Figure 5 and Figure 6, contact pilotage main body upper surface 502 resists square groove top surface 103 and limits the upper of the linear motion of contact pilotage 70
Limit, contact pilotage lower body face 505 resist rotary body upper surface 602 and limit the lower limit that contact pilotage 70 moves along a straight line.
As shown in figure 8,302 bottom surface of bottom plate groove is equipped with edge pin hole corresponding with eight single-point driving units 40
305 and center pin hole 304, the location hole 102 of each bottom plate center pin hole 304 and touch tablet is located at same axle center.Each
Draw at edge of the base edge pin 90,100 lower end of base center pin of the single-point driving unit 40 respectively through bottom plate 30
Foot hole 305, center pin hole 304 are pierced by from 30 bottom surface of bottom plate.
As shown in figure 9, being provided with the installation for matching installation with the contact pilotage 50 of eight single-point driving units 40 among touch tablet
Through-hole, location hole 102 docking of the installation through-hole mainly by square groove 105 and positioned at 105 upper surface of square groove form.
In specific implementation, folk prescription braille structure constitutes eight braille points by the single-point driving unit that eight 2*4 are distributed, i.e.,
One " side ", when single-point driving unit 40 is in working position, braille point boss, when single-point driving unit 40 is in inoperative position
When, braille point recess, the bumps by controlling each point can arrange out Braille.By controlling base center pin 100
With the direction of the electric current inflow and outflow of base edge pin 90, contrary Ampere force, permanent magnet 70 can produce
Main story and reversion are realized, so two kinds of motion modes of raising and lowering may be implemented in contact pilotage 50.
Specific embodiment:
By taking one of single-point driving unit 40 as an example, when electric current is flowed into from base center pin 100, by permanent magnet 70
Conduction is flowed out from base edge pin 90, is the pole S, 70 inside magnetic induction line of permanent magnet since the upper end of permanent magnet 70 is the pole N lower end
Direction straight up, according to left hand rule it is found that 70 lower end surface marginal point of permanent magnet is by tangential Ampere force, permanent magnetism at this time
Body 70 is whole by Ampere force (overlooking visual angle from the top down) along clockwise direction, and permanent magnet 70 is driven to revolve along clockwise direction
Turn, so that rotary body 60 be driven to be rotated in a clockwise direction, since the thread spindle 601 of rotary body 60 is using right-handed thread,
So the rotation band moving contact pin 50 of thread spindle 601 moves upwards, when the square groove top surface 103 of contact pilotage upper surface 502 and touch tablet
Reach stroke upper limit, i.e. raised position when contact.Similarly, when electric current is flowed into from base edge pin 90, by permanent magnet 70
When conduction is flowed out from base center pin 100, permanent magnet 70 is by anticlockwise Ampere force, and contact pilotage 50 is transported downwards at this time
It is dynamic, reach lower travel limit position, i.e. etat lacunaire when contact pilotage lower end surface 505 is contacted with rotary body upper surface 602.This is blind for one
The text point complete duty cycle, as shown in figure 3, the single-point driving unit 40 on a left side 1 and a left side 3 indicates the work shape of single-point driving unit 40
The single-point driving unit 40 on state, a left side 2 and a left side 4 indicates 40 off working state of single-point driving unit.
It follows that the present invention can be realized the up and down motion of braille point and have self-locking function, greatly reduce power consumption, it can
To realize large area, intensive braille lattice arrangement, hardware supported is provided for braille and figure tactile display.
Claims (9)
1. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device, it is characterised in that: including bottom plate (30), middle plate
(20), touch tablet (10) and single-point driving unit (40), touch tablet (10), middle plate (20), bottom plate (30) are respective by passing through
The pin shaft of pin shaft hole is from top to bottom sequentially connected, and touch tablet (10), middle plate (20), bottom plate (30) surround inner hollow jointly
For installing the space of single-point driving unit (40), touch tablet (10), bottom are stretched out in single-point driving unit (40) upper end, lower end respectively
Plate (30);
The single-point driving unit (40) includes contact pilotage (50), rotary body (60), permanent magnet (70) and pedestal (80), pedestal (80)
It is fixed in the bottom plate groove (302) that bottom plate (30) upper surface is equipped with, pedestal (80) top surface is provided with center groove, center groove
The through-hole equipped with base center pin (100) is provided among slot bottom, pedestal (80) top surface around center groove is disposed with a circle
The one end for the base edge pin (90) being equipped in pedestal (80) around annular sheet metal, annular sheet metal and center groove connects
It connects;Permanent magnet (70) is flush-mounted in the center groove of pedestal (80), the core bar inserted base center that permanent magnet (70) lower end is equipped with
In the location hole that pin (100) one end is provided with;Base edge pin (90) other end and base center pin (100) other end are equal
It wears pedestal (80) and bottom plate (30) and is connected to external drive circuit;The square convex block that permanent magnet (70) upper end is equipped with is inserted into rotation
The rotary body bottom square groove (603) that body (60) lower end is provided with, rotary body (60) upper surface are equipped with thread spindle (601), contact pilotage (50)
It is set with thread spindle (601) in the cavity that lower part is equipped with and is connected with thread spindle (601) by screw thread, the touching of contact pilotage (50) upper end
Needle circular shaft (501) is movably placed in the square groove of touch tablet (10).
2. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 1, it is characterised in that: packet
Eight single-point driving units (40) are included, eight single-point driving units (40) are in 2*4 array distribution, form 8 braille touch-controls.
3. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 2, it is characterised in that: institute
State the installation through-hole for being provided among touch tablet and matching installation with the contact pilotage (50) of eight single-point driving units (40), installation through-hole
Mainly the location hole docking by square groove (105) and positioned at square groove (105) upper surface forms;The contact pilotage (50) is mainly by contact pilotage master
Body (503) and the contact pilotage circular shaft (501) for being located at contact pilotage main body (503) upper surface connect composition;Contact pilotage circular shaft (501) and touch tablet
The installation of location hole clearance fit, contact pilotage main body (503) and the circumferential of square groove (105) clearance fit installation limitation contact pilotage (70) are revolved
Transhipment is dynamic.
4. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 2, it is characterised in that: institute
Bottom plate (30) groove floor is stated equipped with edge pin hole (305) corresponding with eight single-point driving unit (40) and center pin
The location hole (102) of hole (304), each bottom plate center pin hole (304) and touch tablet is located at same axle center.
5. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 4, it is characterised in that: every
The base edge pin (90) of a single-point driving unit (40), base center pin (100) lower end are respectively through bottom plate
(30) edge pin hole (305), center pin hole (304) are pierced by from bottom plate (30) bottom surface.
6. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 1, it is characterised in that: institute
Stating permanent magnet (70) can be conductive.
7. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 1, it is characterised in that: institute
It states touch driving unit and is all connected with control circuit board, control circuit board controls electric current and flows into from base edge pin (90) through permanent magnetism
Body (70) from base center pin (100) flow out, or control electric current from base center pin (100) flow into through permanent magnet (70) from
Base edge pin (90) outflow, electric current and permanent magnet (70) internal intrinsic axial magnetic field are mutually perpendicular to make permanent magnet (70) side
Edge generates tangential Ampere force, and then drives permanent magnet (70) axial-rotation, so that rotary body (60) be driven to rotate.
8. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 7, it is characterised in that: institute
Contact pilotage (50) is stated by being threadedly engaged with rotary body (60), the rotary motion of rotary body (60) is changed into the upper and lower of contact pilotage (50)
Linear motion, and screw thread self-locking structure is used between thread spindle (601) and contact pilotage internal screw thread (504).
9. a kind of tactile sense reproduction rotary self-locking formula braille dot matrix display device according to claim 2, it is characterised in that: institute
State the upper limit that contact pilotage main body (503) upper surface resists square groove top surface (103) limitation contact pilotage (70) linear motion, contact pilotage main body
(503) lower end surface resists the lower limit of rotary body upper surface (602) limitation contact pilotage (70) linear motion.
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CN201910045386.0A CN110033674B (en) | 2019-01-17 | 2019-01-17 | Touch sense reproduction rotary self-locking braille lattice display device |
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CN201910045386.0A CN110033674B (en) | 2019-01-17 | 2019-01-17 | Touch sense reproduction rotary self-locking braille lattice display device |
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CN110033674B CN110033674B (en) | 2024-02-23 |
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Cited By (6)
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CN111402686A (en) * | 2020-05-09 | 2020-07-10 | 长春大学 | Cam piston type braille point display |
CN111697754A (en) * | 2020-06-03 | 2020-09-22 | 清华大学 | Touch display and terminal device |
CN111752408A (en) * | 2020-06-03 | 2020-10-09 | 清华大学 | Tactile display device |
CN113327489A (en) * | 2021-06-03 | 2021-08-31 | 西安工业大学 | Layered mechanical intelligent braille reader based on machine vision |
CN115171485A (en) * | 2022-08-04 | 2022-10-11 | 南京信息工程大学 | Electromagnetic drive type braille display device |
CN116719443A (en) * | 2023-08-02 | 2023-09-08 | 中清思源科技(北京)有限公司 | Touch display device |
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CN111402686A (en) * | 2020-05-09 | 2020-07-10 | 长春大学 | Cam piston type braille point display |
CN111697754A (en) * | 2020-06-03 | 2020-09-22 | 清华大学 | Touch display and terminal device |
CN111752408A (en) * | 2020-06-03 | 2020-10-09 | 清华大学 | Tactile display device |
CN111697754B (en) * | 2020-06-03 | 2021-10-29 | 清华大学 | Touch display and terminal device |
CN111752408B (en) * | 2020-06-03 | 2022-01-07 | 清华大学 | Tactile display device |
CN113327489A (en) * | 2021-06-03 | 2021-08-31 | 西安工业大学 | Layered mechanical intelligent braille reader based on machine vision |
CN115171485A (en) * | 2022-08-04 | 2022-10-11 | 南京信息工程大学 | Electromagnetic drive type braille display device |
CN116719443A (en) * | 2023-08-02 | 2023-09-08 | 中清思源科技(北京)有限公司 | Touch display device |
CN116719443B (en) * | 2023-08-02 | 2023-10-27 | 中清思源科技(北京)有限公司 | Touch display device |
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