Braille point display device and working method thereof

Abstract

The invention provides a braille point display device which comprises a shell, a braille dial plate, six braille contacts, a stepping motor with an encoder and a control panel, a top cover is installed on the top of the shell, the top cover is provided with six contact holes for installing the braille contacts respectively, and the braille dial plate and the stepping motor are installed on the control panel. The braille dial plate, the stepping motor and the control panel are mounted in the shell; the braille dial plate is in contact with the bottoms of the six braille contacts, and the state that the braille contacts protrude out of the top cover is changed in the rotating process of the braille watch; the stepping motor is in transmission connection with the circle center position of the bottom of the braille dial plate, and the control panel is electrically connected with the stepping motor and controls the rotating state of the stepping motor, so that the state of the six braille contacts protruding out of the top cover is changed, and different braille alphabets are formed. The invention further provides a working method of the braille point display device.

Description

Technical Field

[0001] The present invention relates to the technical field related to Braille reading equipment, and more precisely to a Braille point display device and a working method thereof. Background Art

[0002] Touch reading is the main reading method for the blind, with the advantages of high recognition and fast reading speed. Traditional Braille books have the disadvantages of expensive special paper, complicated production process, small amount of information, delayed information, inconvenient to carry, etc., which cannot meet the reading needs of the blind. Therefore, some Braille reading devices have been developed in this field to convert the information in traditional Braille books or electronic documents into dynamically changing Braille characters on the Braille reading device. The Braille reading device can increase the amount of reading information with a smaller volume and weight, which is convenient for the blind to carry and better meet the reading needs of the blind.

[0003] Existing Braille reading devices generally use magnetic, electrical, and temperature changes to drive the Braille contacts to switch between a raised or flat state to display Braille text. They are generally large in size and have a complex drive structure. They need to control multiple drive structures to drive the contacts to change states, and their production and maintenance costs are high.

[0004] It can be seen that there is a need in the art for a smaller and lower-cost Braille reading device to improve portability and ease of use. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a Braille display device, which uses a single motor to drive the Braille dial to rotate, thereby driving the corresponding Braille contacts to change the raised state, thereby realizing the Braille dynamic display function with a smaller volume and lower cost.

[0006] Another object of the present invention is to provide a working method of the Braille display device.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a braille display device, comprising a shell, a braille dial, six braille contacts, a stepper motor with an encoder and a control board, wherein a top cover is installed on the top of the shell, and the top cover has six contact holes for respectively installing the braille contacts, and the braille dial, the stepper motor and the control board are installed inside the shell; the braille dial contacts the bottom of the six braille contacts, and changes the state of several braille contacts protruding from the top cover during the rotation of the braille dial; the stepper motor is transmission-connected to the bottom center position of the braille dial, and the control board is electrically connected to the stepper motor to control the rotation state of the stepper motor, thereby changing the state of the six braille contacts protruding from the top cover to form different brailles.

[0008] Preferably, the Braille dial has six circles of concentric guide grooves, and the six circles of guide grooves are respectively connected to the six Braille contacts, and each circle of guide grooves is arranged at intervals. When the Braille contacts slide into the guide grooves, they are in a sunken state, and when the Braille contacts slide out of the guide grooves, they are in a convex state.

[0009] Preferably, each circle of the guide grooves of the braille dial is divided into 64 equal arc grids with the center of the braille dial as the center, and each arc grid corresponds to a different combination of the guide grooves, forming a total of 64 braille representations.

[0010] Preferably, each of the arc grids forms a six-digit binary number according to the depression state of the corresponding circle, the corresponding number is 0 when there is a depression, and the corresponding number is 1 when there is no depression, and the 64 Braille representations correspond to 64 of the six-digit binary numbers, the first digit of the six-digit binary number corresponds to the depression state of the innermost circle, and so on, the sixth digit corresponds to the depression state of the outermost circle, and the 64 six-digit binary numbers are arranged in clockwise order according to Gray code.

[0011] Preferably, the Braille contact comprises a contact body and a follower wheel, the contact body is rotatably connected to the central axis of the follower wheel through a connecting piece, the contact body is slidably installed in the contact hole, and the contact body is limited by the contact hole and cannot be separated from the contact hole; when the follower wheel slides into the guide rail groove, the contact body is in a sunken state; when the follower wheel slides out of the guide rail groove, the contact body is in a raised state.

[0012] Preferably, the control board has a controller, a motor drive module and a communication module, the motor drive module is electrically connected to the stepper motor, and the controller receives instructions from the communication module and controls the rotation of the stepper motor through the motor drive module.

[0013] Preferably, a battery is installed in the housing, and the battery is electrically connected to the control board.

[0014] Preferably, a power switch is installed on the housing, the power switch is electrically connected to the control board, and the power switch controls the on / off state of the battery.

[0015] Preferably, a reading button group is installed on the shell, and the reading button group includes a previous button and a next button to switch Braille.

[0016] The present invention provides a working method of a braille display device, using the braille display device, comprising the steps of:

[0017] (1) The communication module receives the Braille code to be displayed and transmits the Braille code to the controller;

[0018] (2) The controller identifies the received Braille code, converts the Braille code from Gray code to ordinary binary code N, and subtracts the current position code S from the ordinary binary code to calculate the difference D between N and S, D=NS;

[0019] (3) When D is a positive number, the controller controls the stepper motor to rotate counterclockwise by D unit arc grids; when D is a negative number, the controller controls the stepper motor to rotate clockwise by the absolute value unit arc grid of D, driving the braille dial to rotate to the corresponding position and displaying the corresponding braille;

[0020] (4) Update the current position code S=D and prepare to receive the new Braille code.

[0021] Compared with the prior art, the advantages of a Braille display device and a working method thereof disclosed in the present invention are: the Braille display device can display all Braille in a smaller volume, is easy to carry, and helps to improve the user experience of the blind; the Braille display device has a simple driving structure and a lower manufacturing cost; the Braille display device displays Braille based on a six-digit Gray code, and the rotation of the dial by one unit arc only changes the lifting state of one contact, and the control process is simple and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] like Figure 1 Shown is a schematic diagram of the split structure of a Braille display device of the present application.

[0024] like Figure 2 Shown is a schematic structural diagram of a Braille display device of the present application.

[0025] like Figure 3 Shown is a top view of a Braille dial of a Braille display device of the present application.

[0026] like Figure 4 The figure shows a structural schematic diagram of a Braille display device of the present application in which the Braille contacts are combined with the guide rail grooves.

[0027] like Figure 5 Shown is a flow chart of the working method of a Braille display device of the present application. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1 and Figure 2 As shown, a braille display device of the present application includes a housing 1, a braille dial 2, six braille contacts 3, a stepper motor 4 and a control board 5. A top cover 10 is installed on the top of the housing 1. The top cover 10 has six contact holes 101 arranged according to the positions of the braille contacts. The braille contacts 3 are slidably installed in the contact holes 101. The braille dial 2, the stepper motor 3 and the control board 5 are installed inside the housing 1. The braille dial 2 is located at the bottom of the braille contacts 3, and when the braille dial 2 rotates, the state of several braille contacts 3 protruding from the top cover 10 is changed. The stepper motor 3 is connected to the bottom center position of the braille dial 2 to drive the braille dial 2 to rotate. The control board 5 is electrically connected to the stepper motor 3 to control the rotation state of the stepper motor 3. The control board 5 controls the stepper motor 3 to drive the braille dial 2 to rotate clockwise or counterclockwise, changes the protruding state of the six braille contacts 3, and forms different braille. The Braille display device is driven by only one stepping motor, has a small size, is easy to carry, has a simple driving structure, and has a lower manufacturing cost, which is conducive to promotion and popularization.

[0030] Specifically, the control board 5 has a controller, a motor drive module and a communication module, the motor drive module is electrically connected to the stepper motor 3, and the controller receives instructions from the communication module and controls the rotation state of the stepper motor 3 through the motor drive module. Furthermore, a battery is also provided in the housing 1, and the battery is electrically connected to the control board 5, and the battery supplies power to the control board 5 and the stepper motor 3. The communication module can be a Bluetooth communication module or a 4G communication module, etc., and can communicate with a smart terminal.

[0031] The stepper motor 3 is provided with an encoder, and the motor drive module receives and parses the instructions from the controller, and then converts the parsed instructions into a format recognizable by the stepper motor 3, drives the braille dial 2 to rotate to the corresponding position, drives the corresponding braille contacts 3 to bulge or sink, and outputs the corresponding braille. In addition, the controller can also identify the current position code of the stepper motor 3, so as to control the stepper motor 3 to rotate to the corresponding position relative to the current position after receiving the signal.

[0032] The housing 1 is provided with a power switch 11 and a reading button group 12, which are both electrically connected to the control board 5. The power switch 11 controls the power-on state of the battery to realize the on / off function. The reading button group 12 includes two buttons, the previous button and the next button, for switching the display of braille.

[0033] See also Figure 3 and Figure 4 The braille dial 2 has six circles of concentric guide grooves 20, which are respectively connected to the six braille contacts 3. Each circle of guide grooves 20 is arranged at different intervals according to different rules. When the braille contacts 3 slide into the guide grooves 20, they are in a sunken state, and when the braille contacts 3 slide out of the guide grooves 20, they are in a convex state.

[0034] The braille contact 3 includes a contact body 31 and a follower wheel 32. The contact body 31 is rotatably connected to the central axis of the follower wheel 32 through a connecting piece 311. The contact body 31 is slidably installed in the contact hole 101, and the contact body 31 is limited by the contact hole 101 and cannot be separated from the contact hole 101. When the follower wheel 32 slides into the guide groove 29 and moves in the guide groove 29, the contact body 31 is in a sunken state; when the follower wheel 32 slides out of the guide groove 29 and moves on the surface of the braille dial 2, the contact body 31 is in a raised state. The six contact bodies 31 switch between the sunken and raised states to display different brailles.

[0035] The braille dial 2 is arranged corresponding to the contact holes 101. The center of the braille dial 2 is located inside the square frame formed by the six contact holes 101. The six contact holes 101 form a rectangular coordinate system. The coordinates of the six contact holes 101 are: (0,0), (0,1), (0,-1), (1,0), (1,1), (1,-1). Correspondingly, the coordinates of the center of the braille dial 2 are (0.79,-0.66).

[0036] Specifically, each circle of the guide groove 20 of the braille dial 2 is divided into 64 equal arc grids with the center of the braille dial 2 as the center. Each arc grid corresponds to a different combination of guide grooves 20, and each arc grid constitutes a braille representation, forming a total of 64 braille representations. Each guide groove 20 combination forms a six-digit binary number according to whether the corresponding circle has a depression. When the corresponding circle has a depression, the corresponding number is 0, and when the corresponding circle does not have a depression, the corresponding number is 1. The 64 braille representations correspond to 64 six-digit binary numbers. The first digit of the six-digit binary number corresponds to the depression state of the innermost circle, and the sixth digit corresponds to the depression state of the outermost circle. The 64 six-digit binary numbers are arranged clockwise in the order of Gray code to ensure that only one contact point rises and falls when the disc rotates an arc.

[0037] The 6-bit Gray code is arranged in order as follows:

[0038] 000000, 000001, 000011, 000010, 000110, 000111, 000101, 000100,

[0039] 001100, 001101, 001111, 001110, 001010, 001011, 001001, 001000,

[0040] 011000, 011001, 011011, 011010, 011110, 011111, 011101, 011100,

[0041] 010100, 010101, 010111, 010110, 010010, 010011, 010001, 010000,

[0042] 110000, 110001, 110011, 110010, 110110, 110111, 110101, 110100,

[0043] 111100, 111101, 111111, 111110, 111010, 111011, 111001, 111000, 101000, 101001, 101011, 101010, 101110, 101111, 101101, 101100, 100100, 100101, 100111, 100110, 100010, 100011, 100001, 100000.

[0044] See also Figure 5 The present application also discloses a working method of a Braille display device, using the Braille display device, comprising the steps of:

[0045] (1) The communication module receives the Braille code to be displayed and transmits the Braille code to the controller;

[0046] (2) The controller identifies the received Braille code, converts the Braille code from Gray code to ordinary binary code N, and subtracts the current position code S from the ordinary binary code to calculate the difference D between N and S, D=NS;

[0047] (3) When D is a positive number, the controller controls the stepper motor to rotate counterclockwise by D unit arc grids; when D is a negative number, the controller controls the stepper motor to rotate clockwise by the absolute value unit arc grid of D, driving the braille dial to rotate to the corresponding position and displaying the corresponding braille;

[0048] (4) Update the current position code S=D and prepare to receive the new Braille code.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Braille display device, characterized in that: The invention comprises a shell, a braille dial, six braille contacts, a stepper motor with an encoder and a control board. A top cover is installed on the top of the shell, and the top cover has six contact holes for installing the braille contacts respectively. The braille dial, the stepper motor and the control board are installed inside the shell. The braille dial contacts the bottom of the six braille contacts, and changes the state of several braille contacts protruding from the top cover during the rotation of the braille dial. The stepper motor is transmission-connected to the bottom center position of the braille dial, and the control board is electrically connected to the stepper motor to control the rotation state of the stepper motor, thereby changing the state of the six braille contacts protruding from the top cover to form different brailles.

2. The Braille display device according to claim 1, characterized in that: The Braille dial is provided with six circles of concentric guide grooves, which are respectively connected to the six Braille contacts. The guide grooves in each circle are arranged at intervals. When the Braille contacts slide into the guide grooves, they are in a sunken state, and when the Braille contacts slide out of the guide grooves, they are in a convex state.

3. The Braille display device according to claim 2, characterized in that: Each circle of the guide groove of the braille dial is divided into 64 equal arc grids with the center of the braille dial as the center, and each arc grid corresponds to a different guide groove combination, forming a total of 64 braille representations.

4. The Braille display device according to claim 3, characterized in that: Each arc grid forms a six-digit binary number according to the depression state of the corresponding circle. When there is a depression, the corresponding number is 0, and when there is no depression, the corresponding number is 1. The 64 Braille representations correspond to 64 of the six-digit binary numbers. The first digit of the six-digit binary number corresponds to the depression state of the innermost circle, and so on. The sixth digit corresponds to the depression state of the outermost circle. The 64 six-digit binary numbers are arranged in clockwise order according to Gray code.

5. The Braille display device according to claim 2, characterized in that: The Braille contact includes a contact body and a follower wheel, wherein the contact body is rotatably connected to the central axis of the follower wheel through a connecting piece, the contact body is slidably installed in the contact hole, and the contact body is limited by the contact hole and cannot be separated from the contact hole; when the follower wheel slides into the guide rail groove, the contact body is in a sunken state; when the follower wheel slides out of the guide rail groove, the contact body is in a raised state.

6. The Braille display device according to claim 4, characterized in that: The control board is provided with a controller, a motor drive module and a communication module. The motor drive module is electrically connected to the stepper motor. The controller receives instructions from the communication module and controls the rotation of the stepper motor through the motor drive module.

7. The Braille display device according to claim 6, characterized in that: A battery is installed in the housing, and the battery is electrically connected to the control board.

8. The Braille display device according to claim 7, characterized in that: A power switch is installed on the shell, the power switch is electrically connected to the control board, and the power switch controls the on and off state of the battery.

9. The Braille display device according to claim 6, characterized in that: A reading button group is installed on the shell, and the reading button group includes a previous button and a next button to switch braille.

10. A method for operating a Braille display device, characterized in that: The braille display device according to claim 4 comprises the following steps: (1) The communication module receives the Braille code to be displayed and transmits the Braille code to the controller; (2) The controller identifies the received Braille code, converts the Braille code from Gray code to ordinary binary code N, and subtracts the current position code S from the ordinary binary code to calculate the difference D between N and S, D=NS; (3) When D is a positive number, the controller controls the stepper motor to rotate D unit arc grids counterclockwise; When D is a negative number, the controller controls the stepper motor to rotate clockwise by the absolute value unit arc of D, driving the braille dial to rotate to the corresponding position and displaying the corresponding braille; (4) Update the current position code S=D and prepare to receive the new Braille code.

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