CN114911339A - Braille display device for touch screen application and reading direction guiding method - Google Patents
Braille display device for touch screen application and reading direction guiding method Download PDFInfo
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- CN114911339A CN114911339A CN202111586025.0A CN202111586025A CN114911339A CN 114911339 A CN114911339 A CN 114911339A CN 202111586025 A CN202111586025 A CN 202111586025A CN 114911339 A CN114911339 A CN 114911339A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000523 sample Substances 0.000 claims abstract description 72
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 5
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 210000003811 finger Anatomy 0.000 description 21
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000005224 forefinger Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0441—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0442—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
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Abstract
The invention discloses a Braille display device applied to a touch screen and a reading direction guiding method, belonging to the technical field of Braille display devices and comprising a control unit and a Braille display unit connected with the control unit; the control unit comprises a control module, a Bluetooth communication module and a power module which are all arranged in the control box; the Braille display unit comprises a main body frame, a probe array module, a capacitance contact, an attitude detection module and four piezoelectric actuators; the device can quickly and efficiently convert the characters on the touch screen into the braille through the probe array, can meet the reading speed and reading habit of the blind, and can replace the blind documents to become a tool for the blind to learn the characters in daily life; the portable fingerstall type touch screen is easy to carry and high in flexibility, and the practicability is greatly improved by combining the portable fingerstall type device with the touch screen with refreshable data; the piezoelectric actuators distributed in different directions provide direction guidance for the movement of the fingers of the blind on the touch screen, and help the blind to accurately and continuously read according to the typesetting sequence of characters.
Description
Technical Field
The invention belongs to the technical field of Braille display devices, and relates to a Braille display device and a reading direction guiding method for touch screen application.
Background
In the current information age, reading is increasingly accessible to the average person. The blind still reads mostly by touching the blind document. The traditional braille books have the defects of high manufacturing cost, heavy weight, inconvenience in carrying and the like. How to help the blind to quickly and efficiently read becomes an urgent need of blind groups. At present, the blind people are mostly helped to use intelligent products in the market by adopting a blind people voice broadcasting mode, but under certain specific conditions, the blind people cannot well enjoy the convenience brought by the technologies. For example, when the blind people use the electronic device without the assistance, the blind people have difficulty in reading information and are difficult to send the information to others by themselves, the risk of revealing personal privacy exists when the blind people listen to the voice information in public places, the blind people without healthy hearing cannot receive the voice broadcast information, and the braille reader is expensive and difficult to purchase.
In recent years, mobile intelligent equipment provides great convenience for people to read on a touch screen, but the blind cannot normally use the touch screen because the blind cannot acquire visual information. Therefore, it would be very significant to develop a braille display device for the blind to help them perceive the literal information in the touch screen. In addition, considering that the touch screen is a featureless plane, how to help the blind to independently and continuously read according to the typesetting sequence of the characters is also important to consider.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a miniaturized braille display device having braille display and direction guide functions. The device provides refreshable Braille information for the blind to read by utilizing the probe array driven by electromagnetic force, and provides motion direction guide based on vibration tactile feedback for the movement of the fingers of the blind on the touch screen through the piezoelectric actuators distributed in four directions. The invention provides the following technical scheme: a Braille display device applied to a touch screen comprises a control unit and a Braille display unit connected with the control unit; the control unit comprises a control module, a Bluetooth communication module and a power module which are all arranged in the control box; the Braille display unit comprises a main body frame, a probe array module, a capacitance contact, an attitude detection module and four piezoelectric actuators;
the capacitance contact is installed right below the main body frame, the attitude detection module is installed at the top end of the main body frame, a finger hole is formed in the upper portion of the main body frame, the probe array module is installed in the main body frame, the top end of the probe array module is located in the finger hole, the four piezoelectric actuators are installed on the front side face, the rear side face, the left side face and the right side face of the main body frame respectively, and the probe array module, the piezoelectric actuators and the attitude detection module are connected with the control module respectively;
the capacitance contact contacts with text information on a touch screen of the mobile terminal; the mobile terminal sends the text information to the control module through the Bluetooth communication module; the control module encodes the received text information and controls the probe array module to reproduce the braille.
Preferably, the upper part in the finger hole is provided with a fixing belt.
Preferably, the main body frame is provided with an interface, and control lines of the probe array module, the piezoelectric actuator and the attitude detection module are connected with the control unit through connecting lines from the interface.
Preferably, the probe array module comprises six probe units and six electromagnetic actuator units, the electromagnetic actuator units are used for driving the probe units to move up and down, and the top ends of the six probe units respectively penetrate through the bottoms of the finger holes.
Preferably, the probe unit includes the probe and the iron core of being connected with the probe, the electromagnetic actuating unit includes the sleeve, magnet is installed at telescopic upper and lower both ends, the sleeve middle part cover is equipped with the coil of being connected with power module, telescopic one side is connected with the second sleeve, the bottom activity of probe sets up in the second sleeve, the iron core activity sets up in the sleeve.
Preferably, the movement stroke of the up-and-down movement of the probes is 2mm, the diameter of the probes is 1.5mm, the distance between the probes is 2.5mm, and the six probes form a standard Braille array.
Preferably, both ends are provided with the boss about the sleeve, magnet includes at least one porose ring slice neodymium iron boron permanent magnet in center, ring slice neodymium iron boron permanent magnet cover is established on the boss with muffjoint.
Based on a reading direction guiding method of a Braille display device applied to a touch screen, in the process that a capacitive contact slides on the touch screen, a gesture detection module detects the gesture of a Braille display unit in real time and sends detection information to a control module through a Bluetooth communication module; the control module drives the piezoelectric actuator to generate directional vibration prompt according to the detected gesture of the Braille display unit, guides a user to move the capacitive contact to a correct character row, and then continues to read the character row until the row is finished; the above process is repeated until the reading is finished.
Has the advantages that: the device can quickly and efficiently convert the characters on the touch screen into the braille through the probe array, can meet the reading speed and reading habit of the blind, and can replace the blind documents to become a tool for the blind to learn the characters in daily life; the portable fingerstall type touch screen has the advantages that the size is small, the carrying is easy, the flexibility is high, and the practicability is greatly improved by combining the portable fingerstall type device with the touch screen with refreshable data; the piezoelectric actuators distributed in different directions provide direction guidance for the movement of the fingers of the blind on the touch screen, and help the blind to accurately and continuously read according to the typesetting sequence of characters.
Drawings
FIG. 1 is a schematic view of a scene in which the device interacts with a touch screen in a use state;
FIG. 2 is a schematic view of the contact state between the user's finger and the device in the use state;
FIG. 3 is a schematic view of the overall structure of the present invention;
FIG. 4 is a schematic diagram of a control unit of the present invention;
FIG. 5 is a schematic view of a Braille display unit of the present invention;
FIG. 6 is a schematic view of a probe array module of the present invention;
FIG. 7 is a schematic structural diagram of a probe unit according to the present invention;
FIG. 8 is a schematic diagram of an electromagnetic actuator according to the present invention;
FIG. 9 is a schematic view of the sleeve construction of the present invention;
fig. 10 is a schematic diagram of the circuit connection relationship of the present invention.
The symbols in the drawings illustrate that: 1: a control unit; 2: a Braille display unit; 3: a connecting wire; 4: a main body frame; 5: a probe array module; 6: a capacitive contact; 7: an interface; 8: a finger hole; 9: a probe unit; 10: an electromagnetic actuator unit; 11: a probe; 12: an iron core; 13: a sleeve; 1302: a second sleeve; 1303: a boss; 14: a magnet; 15: a coil; 16: a control module; 17: a Bluetooth communication module; 18: a power supply module; 19: a control box; 20: a piezoelectric actuator; 21: an attitude detection module; and 30, mobile terminal.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate orientations or positional relationships based on those shown in the drawings, only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second", etc. do not represent an important degree of the component, and thus, are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
Example 1:
referring to fig. 1 to 10, the present invention provides a technical solution, a braille display device for touch screen application, including a control unit 1 and a braille display unit 2 connected to the control unit 1; the control unit 1 comprises a control module 16, a Bluetooth communication module 17 and a power supply module 18 which are all arranged in a control box 19; the Braille display unit 2 comprises a main body frame 4, a probe array module 5, a capacitance contact 6, a posture detection module 21 and four piezoelectric actuators 20;
the capacitance contact 6 is installed right below the main body frame 4, the attitude detection module 21 is installed at the top end of the main body frame 4, the finger hole 8 is formed in the upper portion of the main body frame 4, the probe array module 5 is installed in the main body frame 4, the top end of the probe array module is located in the finger hole 8, the four piezoelectric actuators 20 are installed on the front side face, the rear side face, the left side face and the right side face of the main body frame 4 respectively, and the probe array module 5, the piezoelectric actuators 20 and the attitude detection module 21 are connected with the control module 16 respectively;
the capacitance contact 6 is contacted with the character information on the touch screen of the mobile terminal; the mobile terminal sends the text information to the control module 16 through the Bluetooth communication module 17; the control module 16 encodes the received character information and controls the probe array module 5 to reproduce the braille.
When the Braille display device is used, the middle finger of a user is put into the finger hole 8 and put on the Braille display unit 2, and the finger belly is in contact with the probe array module 5; the forefinger and the ring finger are respectively contacted with the piezoelectric actuators 20 at two sides of the main body frame 4, and the back of the thumb is contacted with the inner side piezoelectric actuator 20; the control unit 1 is fixed on the arm, and the Braille display unit 2 exchanges data with the mobile terminal 30 through the Bluetooth communication module 17;
the capacitive contact 6 is in contact with a touch screen in the mobile terminal 30, when the capacitive contact 6 slides along the character reading direction, the touch screen reads the contact position of the capacitive contact 10, the touch screen detects character information of an interaction occurrence position in real time, the mobile terminal 30 sends the Braille character information corresponding to the contact position to the control module 16 through the Bluetooth communication module 17, the control module 16 performs Braille coding processing on the received character information, and the refreshable probe array module 5 is used for reproducing the character information in the touch screen for the blind;
in the process that the capacitive contact 6 slides on the touch screen, the gesture detection module 21 detects the gesture of the Braille display unit 2 in real time and sends detection information to the control module 16 through the Bluetooth communication module 17, and the control module 16 drives one or two piezoelectric actuators 20 corresponding to the typesetting direction of a row of characters on the touch screen to generate directional vibration prompt according to the detected gesture of the Braille display unit 2; if the sliding direction of the capacitor contact 6 deviates from the typesetting direction of the text in the row, the control module 16 drives the piezoelectric actuator 20 to generate an upward or downward directional vibration prompt to guide the capacitor contact 6 to return to the row where the correct text is located, and then continues to read the text in the row until the row is finished; the left and right piezoelectric actuators 20 and the inner piezoelectric actuator 20 are in direct contact with fingers, and the vibration prompt generated by the outer piezoelectric actuator 20 can be indirectly sensed, so that the fingers of the blind can be guided to read according to the correct character typesetting sequence.
Further, the upper part in the finger hole 8 is provided with a fixing belt 22, which is convenient for fixing the finger.
Furthermore, the main body frame 4 is provided with an interface 7, and control lines of the probe array module 5, the piezoelectric actuator 20 and the posture detection module 21 are connected with the control unit 1 through the connecting line 3 from the interface 7, so that the interface 7 is arranged, the connecting line 3 is convenient to arrange, and the influence on the use of the blind person is prevented.
Further, the gesture detection module 21 employs an MPU6050 chip.
Example 2:
referring to fig. 1-10, on the basis of embodiment 1, when the blind person wears the braille display unit 2 and directly places the capacitive contact 6 on the touch screen of the mobile terminal 30, the mobile terminal transmits the position information of the capacitive contact 6 and the position of the first line of text beginning information to the control module 16 through the bluetooth communication module 17, the control module 16 judges the positions of the position information and the first line of text beginning information, and controls the piezoelectric actuator 20 to vibrate to guide the user hand of the blind person to move the capacitive contact 6 to the position of the first line of text beginning, at this time, the blind person can place the other hand at the leftmost side as an external reference system, and drive the braille display unit 2 to read according to the typesetting sequence of the page; when the reading of the first row is finished, the other hand moves downwards for one row, and the capacitance contact 6 is moved to the leftmost side of the second row by using the hand driving device to continue the reading; when a reading direction deviation occurs, guidance correction is performed in the same manner as in example 1.
Example 3:
referring to fig. 1-10, the present invention provides a technical solution, in embodiment 1, a probe array module 5 includes six probe units 9 and six electromagnetic actuator units 10, where the electromagnetic actuator units 10 are used to drive the probe units 9 to move up and down, and the top ends of the six probe units 9 respectively pass through the bottoms of the finger holes 8; the probe unit 9 comprises a probe 11 and an iron core 12 connected with the probe, the electromagnetic actuating unit 10 comprises a sleeve 13, magnets 14 are installed at the upper end and the lower end of the sleeve 13, a coil 15 connected with a power module 18 is sleeved in the middle of the sleeve 13, one side of the sleeve 13 is connected with a second sleeve 1302, the bottom of the probe 11 is movably arranged in the second sleeve 1302, and the iron core 12 is movably arranged in the sleeve 13; the core 12 is made of electrical pure iron with the model number DT4C,
when the probe 11 moves up and down, the power module 18 is required to supply forward or reverse current to the coil 15, the iron core 12 is magnetized to form a magnetic pole in a corresponding direction, the probe 11 is driven to move up and down in the second sleeve 1302 and penetrates through the bottom of the finger hole 8, the fingers of the blind feel the probe 11, and the six probes 11 are combined to display braille; the locking function of the braille display unit 2 is realized based on the attraction force of the magnet 14 to the iron core 12; when the braille is not displayed, the coil 15 is not energized, and the iron core 12 is locked at the lowest position by the attraction force of the lower magnet 14; when displaying braille, the coil 15 is energized to magnetize the iron core 12 and move upward, and the iron core 12 is locked at the highest position by the attraction of the upper end magnet 14 to the iron core 12.
The upper part of the magnet 14 at the upper end of the sleeve 13 is an N pole, the lower part of the magnet 14 at the lower end is an S pole, and the upper part of the magnet 14 at the lower end is an S pole and the lower part of the magnet is an N pole; the clockwise winding of the coil 15 is set as an example: when the probe 11 needs to move upwards, forward current is introduced to the coil 15, the iron core 12 is magnetized instantly, the upper part of the iron core 12 is an N pole, the lower part of the iron core 12 is an S pole, and the magnetized iron core 12 is simultaneously attracted upwards by the upper end magnet 14 and pushed upwards by the lower end magnet 14, so that the probe 11 is driven to move upwards;
when the upward movement is not needed, the coil 15 is electrified with reverse current, the iron core 12 is magnetized instantly, and the upper part of the iron core 12 is an S pole, and the lower part of the iron core 12 is an N pole; the iron core 12 magnetized at this time is simultaneously subjected to the downward thrust of the upper end magnet 14, the downward attraction of the lower end magnet 14, and the self gravity; under the combined action of the three forces, iron core 12 drives probe 11 to move downwards to return to the initial state.
Further, the moving stroke of the up-and-down movement of the probe 11 is 2mm, the diameter of the probe 11 is 1.5mm, the interval between the probes 11 is 2.5mm, and six probes 11 constitute a standard braille array.
Further, bosses 1303 are arranged at the upper end and the lower end of the sleeve 13, and the magnet 14 includes at least one circular-ring-shaped sheet-shaped neodymium-iron-boron permanent magnet with a hole in the center, which is sleeved on the bosses 1303 and connected with the sleeve 13.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Various equivalents may be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalents all belong to the protection scope of the present invention.
Claims (8)
1. A braille display device for touch screen application is characterized in that: the braille display device is characterized by comprising a control unit (1) and a braille display unit (2) connected with the control unit (1); the control unit (1) comprises a control module (16), a Bluetooth communication module (17) and a power module (18) which are all arranged in a control box (19); the Braille display unit (2) comprises a main body frame (4), a probe array module (5), a capacitor contact (6), a posture detection module (21) and four piezoelectric actuators (20);
the capacitance contact (6) is installed right below the main body frame (4), the posture detection module (21) is installed at the top end of the main body frame (4), a finger hole (8) is formed in the upper portion of the main body frame (4), the probe array module (5) is installed in the main body frame (4), the top end of the probe array module is located in the finger hole (8), the four piezoelectric actuators (20) are installed on the front side face, the rear side face, the left side face and the right side face of the main body frame (4) respectively, and the probe array module (5), the piezoelectric actuators (20) and the posture detection module (21) are connected with the control module (16) respectively;
the capacitance contact (6) is in contact with text information on a touch screen of the mobile terminal; the mobile terminal sends the text information to the control module (16) through the Bluetooth communication module (17); the control module (16) encodes the received character information and controls the probe array module (5) to reproduce Braille.
2. A braille display device oriented for touch-screen applications according to claim 1, characterized in that: and a fixing band (22) is arranged at the inner upper part of the finger hole (8).
3. A braille display device oriented for touch-screen applications according to claim 1, characterized in that: an interface (7) is installed on the main body frame (4), and control lines of the probe array module (5), the piezoelectric actuator (20) and the posture detection module (21) are connected with the control unit (1) from the interface (7) through a connecting line (3).
4. A braille display device oriented for touch-screen applications according to claim 1, characterized in that: the probe array module (5) comprises six probe units (9) and six electromagnetic actuator units (10), wherein the electromagnetic actuator units (10) are used for driving the probe units (9) to move up and down, and the top ends of the six probe units (9) penetrate through the bottoms of the finger holes (8) respectively.
5. A braille display device for touch-screen applications according to claim 4, characterized in that: probe unit (9) include probe (11) and iron core (12) be connected with the probe, electromagnetism actuating unit (10) are including sleeve (13), magnet (14) are installed at the upper and lower both ends of sleeve (13), sleeve (13) middle part cover is equipped with coil (15) be connected with power module (18), one side of sleeve (13) is connected with second sleeve (1302), the bottom activity of probe (11) sets up in second sleeve (1302), iron core (12) activity sets up in sleeve (13).
6. A braille display device for touch-screen applications according to claim 5, characterized in that: the motion stroke of probe (11) up-and-down motion is 2mm, the diameter of probe (11) is 1.5mm, interval between probe (11) is 2.5mm, and six probe (11) constitute standard braille array.
7. A braille display device for touch-screen applications according to claim 5, characterized in that: both ends are provided with boss (1303) about sleeve (13), magnet (14) include at least one porose ring slice neodymium iron boron permanent magnet in center, ring slice neodymium iron boron permanent magnet cover is established and is connected with sleeve (13) on boss (1303).
8. A reading direction guiding method of a braille display device oriented to touch-screen application based on any one of claims 1 to 7 characterized in that:
in the process that the capacitive contact (6) slides on the touch screen, the gesture detection module (21) detects the gesture of the Braille display unit (2) in real time and sends detection information to the control module (16) through the Bluetooth communication module (17); the control module (16) drives the piezoelectric actuator (20) to generate directional vibration prompts according to the detected gesture of the Braille display unit (2), guides a user to move the capacitor contact (6) to a line where correct characters are located, and then continues to read the characters of the line until the line is finished; the above process is repeated until the reading is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586025.0A CN114911339B (en) | 2021-12-21 | Braille display device for touch screen application and reading direction guiding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586025.0A CN114911339B (en) | 2021-12-21 | Braille display device for touch screen application and reading direction guiding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114911339A true CN114911339A (en) | 2022-08-16 |
| CN114911339B CN114911339B (en) | 2024-07-26 |
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