Large-format portable braille reader

Abstract

This application provides a large-format portable Braille reader, belonging to the technical field of tactile display for the blind. Specifically, it includes a control motherboard, an infrared detection device, a controller, and a tactile display device. The controller has a communication interface for communicating with an external host computer. The host computer sends control signals to the controller to control the touch points of the tactile display device to protrude or retract. The controller receives gesture marking information and analyzes it in conjunction with the state of each touch point of the tactile display device when the person marks the gesture to obtain touch point marking information. The touch point marking information includes the state of the touch points in the marked area when the person marks the gesture. The controller sends the touch point marking information to the host computer for storage. The host computer converts the touch point marking information into control signals to control the protrusion or retraction of the touch points in the corresponding area of ​​the tactile display device. This allows for the reproduction of the Braille in the marked area, enabling note archiving and rereading.

Description

Technical Field

[0001] This application relates to the field of tactile displays for the blind, and in particular to a large-format portable Braille reader. Background Technology

[0002] Blind people cannot see with their eyes like sighted people; they rely primarily on hearing and touch to obtain information from the outside world. Ordinary personal computers provide users with information mainly through graphics and text displayed on an LCD screen, which is unusable for blind people.

[0003] The conventional method for blind people to learn to read is through Braille embossed paper. Blind people learn by looking at the raised dots, but the paper is thick and heavy, making it inconvenient to carry and flip through. Furthermore, embossed paper requires specialized Braille printing equipment, which is not convenient for real-time reading. Especially when only a portion of the Braille on a sheet needs to be recorded, unwanted dots must be removed, leaving only the necessary dots. This process damages the rest of the Braille embossed paper, resulting in a significant waste of the paper. Summary of the Invention

[0004] In view of this, this application provides a large-format portable Braille reader that solves the problems in the prior art. It detects gesture marking information, parses and records the tactile marking information, and converts the tactile marking information into control signals for tactile protrusion and retraction through a host computer. The marking information is displayed on a tactile display device by electronically controlling the mechanical device, thus saving paper.

[0005] This application provides a large-format portable Braille reader using the following technical solution:

[0006] A large-format portable Braille reader includes a control motherboard, an infrared detection device, a controller, and a tactile display device. The infrared detection device and the controller are mounted on the control motherboard. The tactile display device and the infrared detection device are electrically connected to the controller through the circuitry of the control motherboard. The controller is equipped with a communication interface for communicating with an external host computer. The infrared detection device detects hand gesture marking information when a person marks on the tactile display device. The hand gesture marking information includes the coordinates of the person's fingers on the tactile display device and the gesture itself.

[0007] The host computer sends a control signal to the controller, and the controller controls the touch points of the tactile display device to protrude or retract according to the control signal.

[0008] The controller receives the gesture marking information and analyzes it in conjunction with the state of each touch point of the tactile display device when the person marks the gesture to obtain touch point marking information. The touch point marking information includes the state of the touch points in the marking area when the person marks the gesture. The controller sends the touch point marking information to the host computer for storage.

[0009] The host computer can convert the touch mark information into control signals that control the corresponding area of ​​the touch display device to raise or retract the touch points.

[0010] Optionally, the gesture marking information also includes page-turning gestures. The host computer has a pre-stored information table corresponding to page-turning gestures and page-turning execution signals. When the host computer receives a page-turning gesture detected by the infrared detection device through the controller, the host computer executes a control signal to input the content of the previous or next page to the controller, thereby changing the state of each touch point of the tactile display device.

[0011] Optionally, the large-format portable Braille reader further includes an upper housing with an opening for exposing all contacts. The infrared detection device includes an infrared detection rectangular mounting frame, wherein several infrared emitters are mounted on two adjacent frame sides evenly distributed along the length of the frame side, and several infrared receivers are mounted on two other adjacent frame sides. The infrared emitters and receivers on opposite frame sides correspond one-to-one. The infrared receiver receives the signal emitted by the corresponding infrared emitter. The signals emitted by all the infrared emitters cover all contacts, and the interval between adjacent infrared emitters is smaller than the interval between two adjacent contacts.

[0012] Optionally, the tactile display device includes several Braille modules arranged in an array. Each Braille module includes a main body and a base. The main body is inserted into the base, and the base is fixed to the control motherboard. The main body is provided with multiple rows and columns of retractable contacts.

[0013] Optionally, all contacts are equidistantly distributed;

[0014] The host computer or controller stores an interval mode program, which is used to control that after every certain number of columns, one column of contacts always remains in a retracted state, and after every certain number of rows, one row of contacts always remains in a retracted state.

[0015] Optionally, the number of contacts in each column of the Braille module is greater than the number of contacts in each row, and the Braille modules in adjacent columns are spaced apart, so that the distance between the contacts in two columns of Braille modules that are located on different Braille modules and are close to each other is greater than the distance between the contacts in two adjacent columns of Braille modules that are on the same Braille module, and the distance between the contacts in two rows of Braille modules that are located on different Braille modules and are close to each other is equal to the distance between the contacts in two adjacent rows of Braille modules that are on the same Braille module.

[0016] The host computer or controller stores an interval mode program, which is used to control that after every few rows of contacts, one row of contacts always remains in a retracted state.

[0017] Optionally, the large-format portable Braille reader further includes a module pressing frame and a module fixing mesh. The module fixing mesh is fixed on the inner frame of the module pressing frame. The module fixing mesh has several openings for the contacts to pass through. The module pressing frame is fixedly mounted on the control motherboard, and the module fixing mesh is pressed against the end face of the main body away from the base.

[0018] Optionally, the large-format portable Braille reader also includes a protective frame and a protective film. The protective film is installed on the inner frame of the protective frame, and the protective frame is detachably installed on the upper housing. The protective film covers the end face of the contacts facing away from the control motherboard in the retracted state.

[0019] Optionally, the protective film is adhered to the protective frame.

[0020] Optionally, the upper housing has a scale line protruding from the control motherboard on the edge near the opening, and the scale line is distributed in a direction parallel to the rows or columns of the Braille module.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] The controller receives gesture marking information and analyzes it in conjunction with the state of each touch point on the tactile display device when the person marks the gesture to obtain touch point marking information. This touch point marking information includes the touch point state of the marking area when the person marks the gesture. The controller sends the touch point marking information to a host computer for storage. The host computer can convert the touch point marking information into control signals that control the corresponding area of ​​the tactile display device to raise or lower the touch points; thereby reproducing the Braille in the marked area and enabling note archiving and rereading.

[0023] All contact points are evenly spaced; the contact point spacing is between 2.2 and 3 mm. This large-area arrangement of Braille modules can display graphic outlines and formulas. Simultaneously, the interval mode program controls every few columns of contact points to keep one column of contact points in a retracted state, and every few rows of contact points to keep one row of contact points in a retracted state, clearly distinguishing the rows and columns of Braille text for easy reading.

[0024] The reader has a removable protective film on its surface to prevent contamination from sweat, dust, and other foreign objects. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural block diagram of the large-format portable Braille reader of this application;

[0027] Figure 2 This is a schematic diagram of the control motherboard and tactile display device of this application;

[0028] Figure 3 This is a schematic diagram of the overall structure of the infrared detector in this application;

[0029] Figure 4 This is a schematic diagram of the specific structure of the infrared detector in this application;

[0030] Figure 5 This is a schematic diagram of the module fixing mesh, tactile display device and control motherboard of this application;

[0031] Figure 6 This is a schematic diagram of the protective film, infrared detection device, and upper housing of this application;

[0032] Figure 7 This is a schematic diagram illustrating how the equally spaced contacts in this application remain retracted during Braille reading.

[0033] Figure 8 A schematic diagram showing the retracted contact points of the Braille module, which is set for the spacing between adjacent lines in this application, during Braille reading.

[0034] Explanation of reference numerals in the attached diagram: 1. Control motherboard; 11. Power supply unit; 12. Battery unit; 13. Bluetooth module; 14. Function button; 15. Speaker; 16. Vibration motor; 2. Infrared detection device; 21. Infrared transmitter; 22. Infrared receiver; 23. Infrared detection rectangular mounting frame; 24. Touch point; 3. Controller; 31. Communication interface; 4. Tactile display device; 41. Base; 42. Braille module; 43. Contact point; 44. Main body; 5. Upper shell; 6. Module clamping frame; 61. Module fixing mesh; 7. Protective frame; 71. Protective film; 8. Scale line. Detailed Implementation

[0035] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0036] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0038] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0039] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0040] This application discloses a large-format portable Braille reader.

[0041] like Figure 1 As shown, a large-format portable Braille reader includes a control motherboard 1, an infrared detection device 2, a controller 3, and a tactile display device 4. The control motherboard 1 also houses a power supply unit 11, a battery unit 12, a communication interface 31, a Bluetooth module 13, function buttons 14, a speaker 15, and a vibration motor 16. The power supply unit 11 converts the voltage of an external adapter and manages the charging of the internal battery unit 12, which in turn powers the various components in the large-format portable Braille reader.

[0042] like Figure 2 and Figure 3 As shown, the infrared detection device 2 and the controller 3 are mounted on the control motherboard 1. The tactile display device 4 and the infrared detection device 2 are electrically connected to the controller 3 through the circuit of the control motherboard 1. The controller 3 is provided with a communication interface 31 for communicating with an external host computer. The infrared detection device 2 detects the gesture marking information when a person marks on the tactile display device 4. The gesture marking information includes the coordinates and gesture actions of the person's fingers when marking on the tactile display device 4.

[0043] like Figure 5 and Figure 7 As shown, the tactile display device 4 includes several Braille modules 42 arranged in an array. Each Braille module 42 includes a main body 44 and a base 41. The main body 44 is inserted into the base 41, and the base 41 is fixed to the control motherboard 1. The main body 44 has multiple rows and columns of retractable contacts 43. The main body 44 has a driving structure that corresponds one-to-one with each contact 43. The driving structure receives different signals to cause the contacts 43 to protrude and retract. The contacts 43 on the Braille module 42 can be arranged in a 2*3 or 2*4 pattern. The base 41 is directly soldered to the control motherboard 1 using SMT (Surface Mount Technology) soldering.

[0044] The host computer sends control signals to the controller 3, and the controller 3 sends corresponding electrical signals to the base 41 according to the control signals. The base 41 sends the electrical signals to the drive structure in the main body 44, thereby controlling the contact 43 of the tactile display device 4 to protrude or retract. The controller 3 can be an MCU controller 3, and the communication interface 31 of the MCU controller 3 can be a standard USB, serial port, network port, etc. The host computer can be a computer, tablet computer, mobile phone, etc. The software installed in the host computer interacts with the MCU controller 3 in the control motherboard 1 to read the current status and display the specified Braille module 42 to protrude or retract, thus realizing the reading of Braille. Among them, the English full name of MCU is Microcontroller Unit, and the Chinese name is single-chip microcomputer.

[0045] The controller 3 receives gesture marking information and analyzes it in conjunction with the state of each touch point 43 of the tactile display device 4 when the person marks the gesture to obtain touch point marking information. The touch point marking information includes the state of the touch points 43 in the marking area when the person marks the gesture. The controller 3 sends the touch point marking information to the host computer for storage. The host computer can convert the touch point marking information into control signals to control the corresponding touch points 43 on the tactile display device 4 to protrude or retract, thereby reproducing the Braille markings and realizing the functions of note archiving and rereading.

[0046] The gesture marking information also includes page-turning gestures. The host computer pre-stores an information table corresponding to page-turning gestures and page-turning execution signals. When the host computer receives a page-turning gesture detected by the infrared detection device 2 through the controller 3, the host computer executes a control signal corresponding to the previous or next page content to input to the controller 3, changing the state of each contact point 43 of the tactile display device 4. Specifically, page-turning gestures can include a previous page gesture and a next page gesture. The page-turning execution signals corresponding to the previous page gesture and the next page gesture are the control signal for outputting the previous page Braille content and the control signal for outputting the next page Braille content. The specific action of the previous page gesture can be waving the palm on the left side of the display area of ​​the large-format portable Braille reader, and the specific action of the next page gesture can be waving the palm on the right side of the display area of ​​the large-format portable Braille reader.

[0047] like Figure 3 and Figure 4As shown, the large-format portable Braille reader also includes an upper housing 5, which has an opening for exposing all contacts 43. The infrared detection device 2 includes an infrared detection rectangular mounting frame 23, which surrounds the display area of ​​the large-format portable Braille reader. Several infrared emitters 21, evenly distributed along the length of the frame, are mounted on two adjacent frames of the infrared detection rectangular mounting frame 23. Several infrared receivers 22 are mounted on two other adjacent frames. The infrared emitters 21 and receivers 22 on opposite frames correspond one-to-one. The infrared receivers 22 receive signals emitted by their corresponding infrared emitters 21. The infrared emitters 21 and receivers 22 are electrically connected to the control motherboard 1 and the controller 3. The signals emitted by all the infrared emitters 21 cover all contacts 43. The infrared emitters 21 on each frame edge are distributed from one end of the frame edge to the other end, and the interval between adjacent infrared emitters 21 is smaller than the interval between two adjacent contacts 43. The inner frame of the infrared detection rectangular mounting frame 23 is equipped with a PCB circuit board. The infrared transmitter 21 and the infrared receiver 22 are soldered onto the PCB circuit board. The distance between the signal line emitted by the infrared transmitter 21 and the top of the raised contact 43 can be 2-3mm.

[0048] like Figure 4 As shown, the infrared detection device 2 emits multiple intersecting infrared beams to detect and locate the user's touch point 24. The controller 3 controls each pair of infrared transmitters 21 and infrared receivers 22, but at any given time, only one infrared transmitter 21 and infrared receiver 22 are used for data acquisition. The infrared receiver 22 performs photoelectric conversion on the infrared light, and then performs analog-to-digital conversion before inputting the data to the controller 3. When an object (finger or other object) touches the screen, it blocks the infrared light emitted by the infrared transmitter 21 that passes through the touch location, causing a sharp reduction in the light signal received by the infrared receiver 22. During scanning, the controller 3 will detect that the infrared light on a certain coordinate axis (such as the X direction) is blocked, and then scan the infrared light on another coordinate axis. When it finds that the infrared light on that axis is also blocked, it can determine that a touch operation has occurred, and the position coordinates of the touch point can be calculated. The coordinate information of the touch point 43 can be transmitted to the main control board of the Braille controller 3 via a serial port. In one embodiment, the infrared transmitter 21 of the infrared detection device 2 performs polling scan detection, with a detection cycle of ≤5ms, and continuous detection.

[0049] This application designs an infrared detection device 2 to enable a Braille reader to function as an infrared touchscreen. Infrared touchscreens are inexpensive, easy to install, and convenient for users to operate, effectively detecting even slight and rapid touches. Because infrared touchscreens are unaffected by static electricity, voltage, and current, they are suitable for harsh environments. Furthermore, they do not drift due to usage time or environmental changes, exhibiting high stability. Touching requires no pressing and can be done with a finger or other opaque object. Compared to capacitive screens, infrared touchscreens eliminate the capacitor charging and discharging process, resulting in a faster response.

[0050] like Figure 5 As shown, the large-format portable Braille reader also includes a module frame 6 and a module fixing mesh 61. The module frame 6 surrounds the tactile display device 4, and the module fixing mesh 61 is fixed to the inner frame of the module frame 6. The module fixing mesh 61 has several openings for the contacts 43 to pass through. The module frame 6 is fixedly mounted on the control motherboard 1, and the module fixing mesh 61 is pressed against the end face of the main body 44 away from the base 41. The module frame 6 is fixed to the control motherboard 1 by screws. In this application, the interference fit between the main body 44 and the base 41 allows for precise fixing of the Braille module 42 in the X and Y directions. The module fixing mesh 61, pressed against the end face of the main body 44 away from the base 41, further secures the Braille module 42 in the Z direction. In one embodiment, the thickness of the module fixing mesh 61 is between 0.2mm and 0.5mm, and the inner diameter of the opening on the module fixing mesh 61 is larger than the outer diameter of the contact 43, ensuring that the contact 43 can extend and retract smoothly and preventing the Braille contact 43 from experiencing frictional resistance due to deviations in positioning accuracy.

[0051] like Figure 3 and Figure 6 As shown, the large-format portable Braille reader also includes a protective frame 7 and a protective film 71. The protective film 71 is installed on the inner frame of the protective frame 7, and the protective frame 7 is detachably installed on the upper housing 5. The protective film 71 covers the end face of the retracted contact 43 facing away from the control motherboard 1. The thickness of the protective film 71 can be in the range of 0.04-0.2mm. The protective film 71 is an elastic protective film made of polymer materials such as latex and polyurethane. The elastic protective film has elasticity and a smooth surface, which can reduce the wear of fingerprints by blind people. The distance between the protective film 71 and the top end face of the retracted contact 43 can be between 0.5-1mm. The protective film 71 is adhered to the protective frame 7, which can be manually removed. The protective film 71 is used to protect the Braille reading area from dust and stains. When the protective film 71 is damaged, the protective frame 7 can be manually removed and a matching protective film 71 can be replaced.

[0052] The upper housing 5 has a scale line 8 protruding from the control motherboard 1 on the edge near the opening. The scale line 8 is distributed in a direction parallel to the rows or columns of the Braille modules 42. The protruding scale is used to mark the spacing of each Braille module 42, enabling blind people to quickly and easily locate the modules.

[0053] like Figure 7 As shown, in one embodiment, all contacts 43 are equidistantly distributed; the spacing between contacts 43 is between 2.2-3mm. This large-area arrangement of Braille modules 42 can display graphic outlines and formulas.

[0054] When switching to Braille reading, to clearly distinguish the rows and columns of Braille text, an interval mode control signal can be stored in the host computer. This interval mode control signal controls all contacts 43 to maintain a retracted state after every certain number of columns, and also controls all contacts 43 to maintain a retracted state after every certain number of rows. For example... Figure 7 The contact point 43 in the dotted area always remains in the retracted state.

[0055] like Figure 8 As shown, in another embodiment, when switching to Braille reading, to clearly distinguish the rows and columns of Braille text, the following can be done: The number of touch points 43 in each column of the Braille module 42 is set to be greater than the number of touch points 43 in each row; adjacent columns of Braille modules 42 are spaced apart, so that the distance between two columns of touch points 43 located on different Braille modules 42 and close to each other in adjacent columns of Braille modules 42 is greater than the distance between two adjacent columns of touch points 43 on the same Braille module 42; the spacing between the spaced Braille modules 42 conforms to national standards, ensuring that the spacing between the displayed two columns of Braille is consistent with the spacing in current Braille textbooks; the distance between two rows of touch points 43 located on different Braille modules 42 and close to each other in adjacent rows of Braille modules 42 is equal to the distance between two adjacent rows of touch points 43 on the same Braille module 42; the host computer stores an interval mode control signal, which controls one row of touch points 43 to always remain in a retracted state after every few rows. Figure 8 The contact point 43 in the dotted area always remains in the retracted state.

[0056] The upper housing 5 has a scale line 8 protruding from the control motherboard 1 on the edge near the opening. The scale line 8 is distributed along the direction parallel to the arrangement of the Braille modules 42. The protruding scale is used to mark the spacing of each Braille module 42, enabling blind people to quickly and easily locate the Braille modules 42.

[0057] like Figure 7As shown, in one embodiment, all contacts 43 are equidistantly distributed; the spacing between contacts 43 is between 2.2-3mm. This large-area arrangement of Braille modules 42 can display graphic outlines and formulas.

[0058] When switching to Braille reading, to clearly distinguish the rows and columns of Braille text, an interval mode program can be stored in the host computer or controller 3. This interval mode program controls that after every certain number of columns, one column of contacts 43 remains in a retracted state, and after every certain number of rows, one row of contacts 43 remains in a retracted state. For example... Figure 7 The contact 43 in the dotted area remains in the retracted state. When the interval mode program is on the host computer, it can be started via the host computer's operating interface; when the interval mode program is on the controller 3, it can be started via the function key.

[0059] like Figure 8 As shown, in another embodiment, when switching to Braille reading, in order to clearly distinguish the rows and columns of Braille text, the number of touch points 43 in each column of the Braille module 42 is set to be greater than the number of touch points 43 in each row, and the Braille modules 42 in adjacent columns are spaced apart, so that the distance between two columns of touch points 43 located on different Braille modules 42 and close to each other in adjacent columns of Braille modules 42 is greater than the distance between two adjacent columns of touch points 43 on the same Braille module 42, and the spacing between the spaced Braille modules 42 conforms to National standards ensure that the spacing between the two columns of Braille displayed is consistent with the spacing in current Braille textbooks; the spacing between two rows of contacts 43 on adjacent Braille modules 42 that are close to each other is equal to the spacing between two adjacent rows of contacts 43 on the same Braille module 42, and all contacts 43 are equidistantly distributed; the host computer or controller 3 stores an interval mode program, which is used to control that after every certain number of rows, one row of contacts 43 always remains in a retracted state. Figure 8 The contact point 43 in the dotted area always remains in the retracted state.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A large-format portable Braille reader, characterized by, The application relates to a touch display device, which comprises a control mainboard (1), an infrared detection device (2), a controller (3) and a touch display device (4), the infrared detection device (2) and the controller (3) are installed on the control mainboard (1), the touch display device (4) and the infrared detection device (2) are electrically connected with the controller (3) through the circuit of the control mainboard (1), a communication interface (31) for communicating with an external host computer is arranged on the controller (3), the infrared detection device (2) detects gesture marking information when a person marks on the touch display device (4), and the gesture marking information comprises the coordinates of a finger of the person on the touch display device (4) and a gesture; The host computer sends a control signal to the controller (3), and the controller (3) controls the protrusion or retraction of the contact points (43) of the touch display device (4) according to the control signal; The controller (3) receives the gesture marking information and analyzes the state of each contact point (43) of the touch display device (4) when the person marks to obtain contact point marking information, the contact point marking information comprises the state of the contact points (43) of a marking area when the person marks, and the controller (3) sends the contact point marking information to the host computer for storage; The host computer can convert the contact point marking information into a control signal for controlling the protrusion or retraction of the contact points (43) of the corresponding area of the touch display device (4); The touch display device (4) comprises a plurality of array-arranged Braille modules (42), each Braille module (42) comprises a main body part (44) and a base (41), the main body part (44) is inserted into the base (41), the base (41) is fixed on the control mainboard (1), and a plurality of rows and columns of retractable contact points (43) are arranged on the main body part (44); All the contact points (43) are equidistantly distributed; An interval mode program is stored in the host computer or the controller, and the interval mode program is used for controlling all the contact points (43) to keep one column of contact points (43) in a retracted state after every interval of a plurality of columns, and controlling all the contact points (43) to keep one row of contact points (43) in a retracted state after every interval of a plurality of rows.

2. The large-format portable Braille reader of claim 1, wherein, The gesture marking information further comprises a page turning gesture, an information table corresponding to the page turning gesture and a page turning execution signal is pre-stored in the host computer, when the host computer receives the page turning gesture action detected by the infrared detection device (2) through the controller (3), the host computer inputs a control signal corresponding to the content of the previous page or the next page into the controller (3) to change the state of each contact point (43) of the touch display device (4).

3. The large-format portable Braille reader of claim 1, wherein, The large-format portable Braille reader further comprises an upper shell (5) provided with an opening for leaking all contacts (43), and the infrared detection device (2) comprises an infrared detection rectangular mounting frame (23), wherein two adjacent frame edges are provided with a plurality of infrared emitters (21) uniformly distributed along the length direction of the frame edge, and the other two adjacent frame edges are provided with a plurality of infrared receivers (22), and the infrared emitters (21) and the infrared receivers (22) on the opposite two frame edges correspond to each other, the infrared receiver (22) receives the signal emitted by the corresponding infrared emitter (21), all the signals emitted by the infrared emitters (21) cover all the contacts (43), and the interval between adjacent infrared emitters (21) is less than the interval between adjacent two contacts (43).

4. The large-format portable Braille reader of claim 1, wherein, The number of contacts (43) in each column of the Braille module (42) is greater than the number of contacts (43) in each row, and the Braille modules (42) in adjacent two columns are arranged at intervals, so that the interval between two columns of contacts (43) located on different Braille modules (42) and close to each other in the adjacent two columns of Braille modules (42) is greater than the interval between two columns of contacts (43) on the same Braille module (42), and the interval between two rows of contacts (43) located on different Braille modules (42) and close to each other in the adjacent two rows of Braille modules (42) is equal to the interval between two rows of contacts (43) on the same Braille module (42). The upper computer or controller stores an interval mode program, which is used to control all the contacts (43) to keep one row of contacts (43) retracted at intervals.

5. The large-format portable Braille reader of claim 1, wherein, The large-format portable Braille reader further comprises a module pressing frame (6) and a module fixing mesh (61), the module fixing mesh (61) is fixed on the inner frame of the module pressing frame (6), the module fixing mesh (61) is provided with a plurality of openings for the contacts (43) to pass through, the module pressing frame (6) is fixedly installed on the control mainboard (1), and the module fixing mesh (61) is pressed against the end face of the main body part (44) away from the base (41).

6. The large-format portable Braille reader of claim 3, wherein, The large-format portable Braille reader further comprises a protective frame (7) and a protective film (71), the protective film (71) is installed on the inner frame of the protective frame (7), the protective frame (7) is detachably installed on the upper shell (5), and the protective film (71) covers the end face of the contact (43) in the retracted state and away from the control mainboard (1).

7. The large-format portable Braille reader of claim 6, wherein, The protective film (71) is bonded to the protective frame (7).

8. The large-format portable Braille reader of claim 3, wherein, The upper shell (5) is provided with a scale line (8) protruding away from the control mainboard (1) on the edge close to the opening, and the scale line (8) is distributed in a direction parallel to the rows or columns of the Braille module (42).

Images