CN211207925U - GPRS full-color control circuit - Google Patents
GPRS full-color control circuit Download PDFInfo
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- CN211207925U CN211207925U CN201921892771.0U CN201921892771U CN211207925U CN 211207925 U CN211207925 U CN 211207925U CN 201921892771 U CN201921892771 U CN 201921892771U CN 211207925 U CN211207925 U CN 211207925U
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Abstract
The utility model discloses a GPRS full-color control circuit, including the controller, L ED display screen drive circuit, the information storage circuit that are connected with the controller, the power DC-DC control circuit that is connected with the controller, the DC-DC circuit can step down input power 5V to 4V,3.3V,1.8V or 1.2V, L ED display screen drive circuit is based on SDIO interface mode drive display screen, and converts the drive protocol of display screen into through the protocol of reading SD card content.
Description
Technical Field
The utility model relates to a full-color control circuit of GPRS.
Background
At present, social information is rapidly spread, a taxi L ED display screen and a bus rear window information screen have higher and higher requirements on information resources, and the requirements on simple text propaganda and brightness decoration, pictures, GIF animation and color propaganda are completely not met, the content of programs is rich, the content is conveniently and rapidly transmitted, thousands of taxi display screens in a city are synchronously played, the requirements on the real-time performance and the synchronism of wireless transmission are high, the patent is in the control on vehicle safety and vehicle information at the same time, analysis and processing are required to be carried out on camera, taximeter and GPS position information, and great contribution and effect are achieved by combining big data analysis, so that the benefits of advertisers, taxi companies, drivers and the like are properly distributed, and social civilization harmony is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a full-color control circuit of GPRS.
The utility model provides a technical scheme as follows that above-mentioned technical problem took:
a GPRS full-color control circuit comprises:
a controller;
l ED display screen drive circuit, information memory circuit connected with controller;
the power supply DC-DC control circuit is connected with the controller and can step down 5V of an input power supply to 4V,3.3V,1.8V or 1.2V;
the L ED display screen driving circuit drives the display screen based on SDIO interface mode, and converts the protocol of reading SD card content into the driving protocol of the display screen.
Preferably, the controller is an ARM7 integrated chip.
Preferably, the controller is further connected with a serial RS232 communication interface, and is in communication with computer software to realize network parameter and L ED display screen parameter setting;
the wireless transmission module is used for realizing 2G or 4G wireless data transmission;
the system comprises an external trigger input module, and is triggered by high level and low level to realize alarm information and empty/passenger information switching.
Preferably, the information storage circuit is used for realizing network parameters, L ED display screen parameters and storage information of the advertising programs.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The present invention will be described in detail with reference to the accompanying drawings so that the above advantages of the present invention can be more clearly understood.
Fig. 1 is a schematic structural diagram of a GPRS full-color control circuit of the present invention;
fig. 2 is a schematic circuit diagram of the GPRS full-color control circuit of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following specific embodiments.
As shown in fig. 1 and 2, a GPRS full-color control circuit includes:
a controller;
l ED display screen drive circuit, information memory circuit connected with controller;
the power supply DC-DC control circuit is connected with the controller and can step down 5V of an input power supply to 4V,3.3V,1.8V or 1.2V;
the L ED display screen driving circuit drives the display screen based on SDIO interface mode, and converts the protocol of reading SD card content into the driving protocol of the display screen.
Preferably, the controller is an ARM7 integrated chip.
Preferably, the controller is further connected with a serial RS232 communication interface, and is in communication with computer software to realize network parameter and L ED display screen parameter setting;
the wireless transmission module is used for realizing 2G or 4G wireless data transmission;
the system comprises an external trigger input module, and is triggered by high level and low level to realize alarm information and empty/passenger information switching.
Preferably, the information storage circuit is used for realizing network parameters, L ED display screen parameters and storage information of the advertising programs.
More specifically, in one embodiment, a domestic ARM7 integrated chip is used as the controller:
the DC-DC control circuit comprises a power supply DC-DC control circuit, wherein the DC-DC control circuit can step down 5V of an input power supply into 4V,3.3V,1.8V,1.2V and the like, and provides a required working power supply for each component of the system;
the device comprises serial ports RS232 for communication, and can be communicated with computer software to realize network parameter and L ED display screen parameter setting.
The wireless transmission module part is included, and 2G or 4G wireless data transmission is realized.
The system comprises an external trigger input, and can realize special functions such as alarm information, empty/passenger information switching and the like by high level triggering and low level triggering.
The information storage circuit realizes network parameters, L ED display screen parameters and storage information of the advertisement programs.
And the storage circuit of the program information realizes the storage of the character picture GIF animation.
Data transmission processing mechanism the core key technology of this patent.
The camera/taximeter/GPS Beidou connecting circuit realizes the connection between an external functional device and the system
L ED display screen driving circuit can realize tens of different parameter display screen driving by different program design.
The power supply part of the patent comprises a display screen driving voltage of 5V, a GPRS module working power supply of 4.0V and a main control power supply of 3.3V
The GPRS module/4G module adopts a 4-frequency global universal module and can be suitable for most areas.
The GPS module adopts a big Dipper dual mode and supports 2 formats of GPS data acquisition
F L ASH storage circuit for storing program information by using general NORF L ASH chip
And the DS1302 clock circuit provides program playing requirement attributes such as date and time for the system.
The display screen driving circuit and the L ED display screen interface circuit support a common 8-scan 12-scan and standard 75 interface.
The common scheme is that port IO of high-end performance ARM is adopted for direct driving, or an ARM + FPGA mode is adopted, and high-speed performance parallel output is achieved through the FPGA. And the utility model discloses a with ARM's SDIO interface mode drive display screen, SDIO is general SD card reading agreement, and the functioning speed is fast, and is not high to ARM performance requirement, and we convert this kind of agreement that reads SD card content into the drive protocol of display screen, greatly reduced to ARM's high-end demand or to FPGA's dependence, higher-end display effect is realized to less cost.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A GPRS full-color control circuit is characterized by comprising:
a controller;
l ED display screen drive circuit, information memory circuit connected with controller;
the power supply DC-DC control circuit is connected with the controller and can step down 5V of an input power supply to 4V,3.3V,1.8V or 1.2V;
the L ED display screen driving circuit drives the display screen based on SDIO interface mode, and converts the protocol of reading SD card content into the driving protocol of the display screen.
2. The GPRS full-color control circuit according to claim 1, wherein the controller is an ARM7 integrated chip.
3. The GPRS full-color control circuit according to claim 1, wherein the controller is further connected with a serial RS232 communication interface, and the serial RS232 communication interface is communicated with computer software to realize network parameter and L ED display screen parameter setting;
the wireless transmission module is used for realizing 2G or 4G wireless data transmission;
the system comprises an external trigger input module, and is triggered by high level and low level to realize alarm information and empty/passenger information switching.
4. The GPRS full-color control circuit according to claim 1, wherein the information storage circuit realizes network parameters, L ED display screen parameters, and storage information of advertisement programs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921892771.0U CN211207925U (en) | 2019-11-05 | 2019-11-05 | GPRS full-color control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921892771.0U CN211207925U (en) | 2019-11-05 | 2019-11-05 | GPRS full-color control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211207925U true CN211207925U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921892771.0U Active CN211207925U (en) | 2019-11-05 | 2019-11-05 | GPRS full-color control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211207925U (en) |
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2019
- 2019-11-05 CN CN201921892771.0U patent/CN211207925U/en active Active
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