CN110570827A - train platform ground wireless intelligent display terminal - Google Patents
train platform ground wireless intelligent display terminal Download PDFInfo
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- CN110570827A CN110570827A CN201910858522.8A CN201910858522A CN110570827A CN 110570827 A CN110570827 A CN 110570827A CN 201910858522 A CN201910858522 A CN 201910858522A CN 110570827 A CN110570827 A CN 110570827A
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- chip microcomputer
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
the invention provides a wireless intelligent display terminal for the ground of a train platform, which comprises a solar power supply unit, a brightness control unit and a display unit, wherein the solar power supply unit is connected with the brightness control unit; the solar power supply unit is connected with the brightness control unit and the display unit and is used for supplying power to the brightness control unit and the display unit; the solar power supply unit comprises a photovoltaic module, a controller and a storage battery pack; the brightness control unit comprises a brightness control module, a single chip microcomputer, an ambient brightness sensor, an infrared detection module and a timing awakening module. According to the invention, the ambient brightness is sensed by the ambient brightness sensor, and further, the brighter the environment and clearer the display screen are realized through the synergistic effect of the brightness control module and the single chip microcomputer, so that the situation that the display screen is unclear in a highlight environment is avoided.
Description
Technical Field
the invention relates to the technical field of display terminals, in particular to a ground wireless intelligent display terminal for a train platform.
Background
At present, the display terminal on the ground of the train platform has the following defects:
1) need external 220V power supply, inconvenient construction is unfavorable for the installation.
2) unsafe factors exist in external 220V power supply.
disclosure of Invention
The object of the present invention is to solve at least one of the technical drawbacks mentioned.
therefore, the invention aims to provide a wireless intelligent display terminal for the ground of a train platform, which does not need an external power supply and can automatically change the brightness of a display screen according to ambient illumination.
in order to achieve the above object, the present invention provides a wireless intelligent display terminal for a train platform ground, comprising: the device comprises a solar power supply unit, a brightness control unit and a display unit; the solar power supply unit is connected with the brightness control unit and the display unit and is used for supplying power to the brightness control unit and the display unit;
the solar power supply unit comprises a photovoltaic module, a controller and a storage battery pack;
the photovoltaic module is connected with the controller and used for absorbing sunlight and directly converting solar energy into electric energy;
the controller is respectively connected with the photovoltaic module and the storage battery pack and is used for storing electric energy output by the photovoltaic module into the storage battery pack and controlling the storage battery pack to supply power to the brightness control unit and the display unit;
The storage battery pack is used for storing and outputting the electric energy generated by the photovoltaic module;
The display unit comprises 1 or more display screens and is used for automatically displaying corresponding train number platform information;
the brightness control unit comprises a brightness control module, a single chip microcomputer, an ambient brightness sensor, an infrared detection module and a timing awakening module;
The single chip microcomputer is used for determining the brightness of a display screen in the display unit according to signals output by the ambient brightness sensor, the infrared detection module and the timing awakening module and outputting a control signal to the brightness control module;
The output end of the ambient brightness sensor is connected with the first input end of the single chip microcomputer, and is used for sensing ambient brightness, converting the ambient brightness into a corresponding electric signal and outputting the electric signal to the single chip microcomputer;
The output end of the infrared detection module is connected with the second input end of the single chip microcomputer and used for detecting whether people exist around and converting the signals into corresponding electric signals to be output to the single chip microcomputer;
the output end of the timing awakening module is electrically connected with the third input end of the single chip microcomputer and used for setting whether the display screen displays according to the work and rest time of the platform, converting the work and rest time into corresponding electric signals and outputting the electric signals to the single chip microcomputer.
in any of the above schemes, preferably, the battery pack at least includes overcharge protection, overdischarge protection and overcurrent protection.
In any of the above schemes, preferably, the display unit further includes a display control module, a storage module, and a wireless communication module;
One input end of the display control module is electrically connected with the output end of the wireless communication module, and the other input end of the display control module is electrically connected with the output end of the storage module, and the display control module is used for reading the train number platform information from the wireless communication module or the storage module and sending a display control instruction to a display screen to realize the dynamic display of the train number platform information;
The wireless communication module is used for being in wireless communication connection with a communication server of an external platform information display management center and receiving real-time train number platform information sent by the external platform information display management center;
the storage module is used for locally storing train number platform information for a long time.
In any of the above schemes, preferably, the display control module preferentially receives and transmits the information output by the wireless communication module.
In any of the above schemes, preferably, the wireless communication module is a lora wireless communication module.
in any of the above schemes, preferably, the timing wake-up module sets the display time of each display screen according to the platform work and rest time, and outputs the display time to the single chip microcomputer, and the single chip microcomputer outputs the display time of each display screen to the display control module through the brightness control module.
In any of the above schemes, preferably, an energy consumption management program is set inside the controller, and when the illumination is sufficient, the controller controls the photovoltaic module to output electric energy to the storage battery pack, the brightness control unit and the display unit; when the illumination is insufficient, the controller controls the storage battery pack to output electric energy to the brightness control unit and the display unit.
in any of the above aspects, preferably, the number of the ambient brightness sensors corresponds to the number of the display screens, and each of the ambient brightness sensors is installed around the corresponding display screen and is configured to detect ambient brightness information around the corresponding display screen.
In any of the above schemes, preferably, each ambient brightness sensor transmits ambient brightness information corresponding to the display screen to the single chip, the single chip determines whether to perform brightness adjustment, and when brightness adjustment is required, the brightness control module is controlled to output a brightness adjustment signal to the display control module, and the display control module adjusts the brightness of the corresponding display screen.
In any of the above schemes, preferably, the number of the ambient brightness sensors is 1, the ambient brightness sensors are used for sensing ambient brightness and outputting the ambient brightness to the single chip, the single chip determines whether brightness adjustment is performed, and when brightness adjustment is required, the brightness control module is controlled to output a brightness adjustment signal to the display control module, so as to adjust the brightness of all the display screens.
the train platform ground wireless intelligent display terminal has the following beneficial effects:
1. The solar photovoltaic power generation system uses a solar technology, converts common solar energy into electric energy by using the photovoltaic module as a system energy source, does not need external 220V power supply, is simple in construction, is beneficial to installation, and can greatly save the installation cost.
2. according to the invention, the ambient brightness is sensed by the ambient brightness sensor, and further, the brighter the environment and clearer the display screen are realized through the synergistic effect of the brightness control module and the single chip microcomputer, so that the situation that the display screen is unclear in a highlight environment is avoided.
3. according to the invention, an energy consumption management program is set in the controller, the controller is provided with a rechargeable battery, and when the illumination is sufficient, the controller controls the photovoltaic module to output electric energy to the storage battery pack, the brightness control unit and the display unit; when the illumination is insufficient, the controller controls the storage battery pack to output electric energy to the brightness control unit and the display unit, and the application of the continuous insufficient illumination condition can be met.
4. the invention adopts the LORA wireless communication technology, the communication distance reaches 3 kilometers, and the invention has 433M application-free frequency band and can realize remote data transmission.
5. The running current of the whole machine is within 100uA, so that the whole power consumption can be further reduced.
6. The communication server of the platform information display management center can output a control instruction to the display control module through wireless communication, and wirelessly changes the carriage number displayed by the liquid crystal display.
7. The timing awakening module can set whether the display screen displays according to the work and rest time of the platform and converts the display screen into an available output signal, and the singlechip, the brightness control unit and the display control module cooperatively display the current corresponding platform number according to different train numbers, so that passengers are prevented from missing the carriage.
additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block diagram of the present invention;
In the figure, 1, a solar power supply unit; 2. a brightness control unit; 3. a display unit;
11. a photovoltaic module; 12. a controller; 13. a battery pack;
21. a brightness control module; 22. a single chip microcomputer; 23. an ambient light sensor; 24. an infrared detection module; 25. a timing wake-up module;
31. A display screen; 32. a display control module; 33. a storage module; 34. a wireless communication module;
Detailed Description
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention provides a wireless intelligent display terminal for the ground of a train platform, as shown in figure 1, comprising: the solar energy power supply unit 1, the brightness control unit 2 and the display unit 3; the solar power supply unit 1 is connected with the brightness control unit 2 and the display unit 3 and used for supplying power to the brightness control unit 2 and the display unit 3;
the solar power supply unit 1 comprises a photovoltaic module 11, a controller 12 and a storage battery pack 13;
The photovoltaic module 11 is connected with the controller 12 and used for absorbing sunlight and directly converting the solar energy into electric energy;
the controller 12 is respectively connected with the photovoltaic module 11 and the storage battery pack 13, and is used for storing the electric energy output by the photovoltaic module 11 into the storage battery pack 13 and controlling the storage battery pack 13 to supply power to the brightness control unit 2 and the display unit 3;
The storage battery pack 13 is used for storing and outputting electric energy generated by the photovoltaic module 11;
The display unit 3 comprises 1 or more display screens 31 for automatically displaying corresponding train number platform information;
The brightness control unit 2 comprises a brightness control module 21, a singlechip 22, an ambient brightness sensor 23, an infrared detection module 24 and a timing awakening module 25;
The single chip microcomputer 22 is used for determining the brightness of the display screen 31 in the display unit 3 according to the signals output by the ambient brightness sensor 23, the infrared detection module 24 and the timing wake-up module 25, and outputting a control signal to the brightness control module 21;
The output end of the ambient brightness sensor 23 is connected with the first input end of the single chip microcomputer 22, and is used for sensing ambient brightness, converting the ambient brightness into a corresponding electric signal and outputting the electric signal to the single chip microcomputer 22;
the output end of the infrared detection module 24 is connected with the second input end of the single chip microcomputer 22, and is used for detecting whether people are around, converting the detected signals into corresponding electric signals and outputting the electric signals to the single chip microcomputer 22;
the output end of the timing awakening module 25 is electrically connected with the third input end of the single chip microcomputer 22, and is used for setting whether the display screen 31 displays according to the platform work and rest time, converting the display screen into a corresponding electric signal and outputting the electric signal to the single chip microcomputer 22.
The display unit 3 further comprises a display control module 32, a storage module 33 and a wireless communication module 34;
One input end of the display control module 32 is electrically connected to the output end of the wireless communication module 34, and the other input end thereof is electrically connected to the output end of the storage module 33, and is used for reading the train number platform information from the wireless communication module 34 or the storage module 33 and sending a display control instruction to the display screen 31, so as to realize dynamic display of the train number platform information;
the wireless communication module 34 is used for wirelessly communicating with a communication server of an external platform information display management center and receiving real-time train number platform information sent by the external platform information display management center;
the storage module 33 is used for locally storing train number platform information for a long time.
The working principle is as follows: the photovoltaic module 11 absorbs sunlight, directly converts the solar energy into electric energy, and stores the electric energy in the storage battery pack 13, and the controller 12 controls the storage battery pack 13 to supply power to the brightness control unit 2 and the display unit 3.
When the ambient brightness sensor 23 detects that the ambient brightness is higher than the preset value, the single chip microcomputer 22 sends a highlight adjusting signal to the brightness control module 21, and the display control module 32 controls the display screen to be highlighted after receiving the highlight adjusting signal; otherwise, the dark screen of the display screen is controlled, so that the brighter the environment is, the clearer the display screen is, and the situation that the display screen is in a highlight environment and is displayed indistinctly is avoided.
when the infrared detection module 24 detects that a person approaches, the detection signal is transmitted to the single chip microcomputer, the single chip microcomputer controls the brightness control module 21 to send out a highlight adjusting signal, and the display control module 32 controls the display screen to be highlighted after receiving the highlight adjusting signal; on the contrary, when the infrared detection module 24 does not detect that a person approaches, the display screen is dark; thereby reducing energy consumption and saving electric energy.
the timing wake-up module 25 sets the display time of each display screen 31 according to the platform work and rest time, and outputs the display time to the single chip microcomputer 22, and the single chip microcomputer 22 outputs the display time of each display screen 31 to the display control module 32 through the brightness control module 21, so that the working time of each display screen 31 is consistent with the platform work and rest time, and low power consumption is achieved.
the communication server of the external platform information display management center can also control the display content, the working time, the display brightness and the like of each display screen 31 to the display control module 32 through the wireless communication module.
In another embodiment of the present invention, in order to further improve the power supply safety, at least an overcharge protection, an overdischarge protection, and an overcurrent protection are included in the battery pack 13.
In another embodiment of the present invention, in order to ensure real-time performance between the display screen and the external station information display management center, the display control module 32 preferentially receives and transmits the output information of the wireless communication module 34.
In another embodiment of the present invention, the wireless communication module 34 is a lora wireless communication module 34, the communication distance thereof reaches 3 km, and the wireless communication module has a 433M application-free frequency band, so as to realize remote data transmission.
In another embodiment of the present invention, in order to further save energy consumption, an energy consumption management program is set inside the controller 12, and when the illumination is sufficient, the controller 12 controls the photovoltaic module 11 to output electric energy to the storage battery pack 13, the brightness control unit 2 and the display unit 3; when the light is insufficient, the controller 12 controls the storage battery pack 13 to output electric energy to the brightness control unit 2 and the display unit 3.
in another embodiment of the present invention, in order to manage the brightness of the display screen according to the surrounding environment of each display screen, the number of the ambient brightness sensors 23 corresponds to the number of the display screens 31, and each ambient brightness sensor 23 is installed at the periphery of the corresponding display screen 31 for detecting the surrounding ambient brightness information of the corresponding display screen 31.
Each ambient brightness sensor 23 transmits ambient brightness information corresponding to the display screen 31 to the single chip microcomputer 22, the single chip microcomputer 22 determines whether brightness adjustment is performed, and when brightness adjustment is required, the brightness control module 21 is controlled to output a brightness adjustment signal to the display control module 32, and the display control module 32 adjusts the brightness of the corresponding display screen 31.
In another embodiment of the present invention, in order to perform unified management on all the display screens, the number of the ambient brightness sensors 23 is 1, which is used for sensing ambient brightness and outputting the ambient brightness to the single chip microcomputer 22, the single chip microcomputer 22 determines whether to perform brightness adjustment, and when brightness adjustment is required, the brightness control module 21 is controlled to output a brightness adjustment signal to the display control module 32, so as to perform brightness adjustment on all the display screens 31.
in another embodiment of the present invention, the storage module 33 is connected to the wireless communication module 34, and the communication server of the external platform information display management center can also store the information to be displayed on the display screen and some control information in the storage module through the wireless communication module, which is favorable for realizing real-time update and transmission of information.
The timing awakening module can set whether the display screen displays according to the work and rest time of the platform and converts the display screen into an available output signal, and the singlechip, the brightness control unit and the display control module cooperatively display the current corresponding platform number according to different train numbers, so that passengers are prevented from missing the carriage.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a train platform ground wireless intelligent display terminal, includes: the device comprises a solar power supply unit, a brightness control unit and a display unit; the solar power supply unit is connected with the brightness control unit and the display unit and is used for supplying power to the brightness control unit and the display unit;
the solar power supply unit comprises a photovoltaic module, a controller and a storage battery pack;
The photovoltaic module is connected with the controller and used for absorbing sunlight and directly converting solar energy into electric energy;
The controller is respectively connected with the photovoltaic module and the storage battery pack and is used for storing electric energy output by the photovoltaic module into the storage battery pack and controlling the storage battery pack to supply power to the brightness control unit and the display unit;
The storage battery pack is used for storing and outputting the electric energy generated by the photovoltaic module;
The display unit comprises 1 or more display screens and is used for automatically displaying corresponding train number platform information;
The brightness control unit comprises a brightness control module, a single chip microcomputer, an ambient brightness sensor, an infrared detection module and a timing awakening module;
the single chip microcomputer is used for determining the brightness of a display screen in the display unit according to signals output by the ambient brightness sensor, the infrared detection module and the timing awakening module and outputting a control signal to the brightness control module;
The output end of the ambient brightness sensor is connected with the first input end of the single chip microcomputer, and is used for sensing ambient brightness, converting the ambient brightness into a corresponding electric signal and outputting the electric signal to the single chip microcomputer;
The output end of the infrared detection module is connected with the second input end of the single chip microcomputer and used for detecting whether people exist around and converting the signals into corresponding electric signals to be output to the single chip microcomputer;
The output end of the timing awakening module is electrically connected with the third input end of the single chip microcomputer and used for setting whether the display screen displays according to the work and rest time of the platform, converting the work and rest time into corresponding electric signals and outputting the electric signals to the single chip microcomputer.
2. the train platform ground wireless intelligent display terminal of claim 1, wherein the battery pack at least comprises an overcharge protection, an overdischarge protection and an overcurrent protection.
3. the train platform ground wireless intelligent display terminal of claim 1, wherein the display unit further comprises a display control module, a storage module, a wireless communication module;
one input end of the display control module is electrically connected with the output end of the wireless communication module, and the other input end of the display control module is electrically connected with the output end of the storage module, and the display control module is used for reading the train number platform information from the wireless communication module or the storage module and sending a display control instruction to a display screen to realize the dynamic display of the train number platform information;
The wireless communication module is used for being in wireless communication connection with a communication server of an external platform information display management center and receiving real-time train number platform information sent by the external platform information display management center;
The storage module is used for locally storing train number platform information for a long time.
4. The ground wireless intelligent display terminal for train platforms according to claim 3, wherein the display control module preferentially receives and transmits the information outputted from the wireless communication module.
5. the ground wireless intelligent display terminal for train platform according to claim 3, wherein the wireless communication module is a lora wireless communication module.
6. the ground wireless intelligent display terminal for train platform according to claim 3, wherein the timing wake-up module sets the display time of each display screen according to the work and rest time of the platform and outputs the set display time to the single chip microcomputer, and the single chip microcomputer outputs the display time of each display screen to the display control module through the brightness control module.
7. The train platform ground wireless intelligent display terminal of claim 1, wherein the controller is internally configured with an energy consumption management program, and when the illumination is sufficient, the controller controls the photovoltaic module to output electric energy to the storage battery pack, the brightness control unit and the display unit; when the illumination is insufficient, the controller controls the storage battery pack to output electric energy to the brightness control unit and the display unit.
8. The train platform ground wireless intelligent display terminal according to claim 1, wherein the number of the ambient light sensors corresponds to the number of the display screens, and each of the ambient light sensors is installed at the periphery of the corresponding display screen for detecting the ambient light information of the periphery of the corresponding display screen.
9. The train platform ground wireless intelligent display terminal of claim 8, wherein each ambient brightness sensor transmits ambient brightness information of the corresponding display screen to the single chip, the single chip determines whether brightness adjustment is performed, when brightness adjustment is required, the brightness control module is controlled to output a brightness adjustment signal to the display control module, and the display control module adjusts the brightness of the corresponding display screen.
10. The train platform ground wireless intelligent display terminal according to claim 1, wherein the number of the ambient brightness sensors is 1, the ambient brightness sensors are used for sensing ambient brightness and outputting the ambient brightness to the single chip microcomputer, the single chip microcomputer judges whether brightness adjustment is performed, and when brightness adjustment is required, the brightness control module is controlled to output a brightness adjustment signal to the display control module, so that brightness adjustment is performed on all display screens.
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| CN201910858522.8A CN110570827A (en) | 2019-09-11 | 2019-09-11 | train platform ground wireless intelligent display terminal |
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| CN201910858522.8A CN110570827A (en) | 2019-09-11 | 2019-09-11 | train platform ground wireless intelligent display terminal |
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| CN115394215A (en) * | 2022-09-23 | 2022-11-25 | 桂林海威科技股份有限公司 | Movable LED information board |
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Application publication date: 20191213 |
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| RJ01 | Rejection of invention patent application after publication |