A serial port screen device and display equipment
By introducing RS422 to serial port module and signal processing module into the serial port screen device, the problem that the serial port screen cannot communicate directly with RS422 bus is solved, and direct RS422 communication is realized, improving the practicality of the device.
Patent Information
- Application Number
- CN202421241392.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing serial port screen cannot communicate directly using the RS422 bus, and requires an additional signal converter, which is inconvenient to use and low practicality.
A serial port screen device is designed, including RS422 to serial port module, signal processing module and display module. The RS422 signal is converted into a TTL level signal through the RS422 to serial port chip, and then processed through the signal processing module and output to the display module.
The RS422 communication capability of the serial port screen is realized, avoiding the addition of additional conversion modules, and improving the practicality of the serial port screen.
Smart Images
Figure CN222705167U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of display screens, and in particular to a serial port screen device and a display apparatus. Background Art
[0002] The serial port screen is an intelligent serial port control display screen that can be redeveloped in a configurable manner. It refers to a TFT (Thin Film Transistor) color LCD display control module with serial port communication. It can be connected to external devices such as PLC (Programmable Logic Controller), inverter, temperature control instrument, data acquisition module, etc., use the display screen to display relevant data, write parameters or input operation instructions through input units such as touch screen, buttons, mouse, etc., so as to realize information interaction between users and machines.
[0003] Generally, serial screens only support TTL / 232 / 485 communication and cannot use other communication methods, so the market for serial screens is relatively single. Some large equipment in the field of industrial automation will use RS422 bus communication to connect sensors, PLC modules, etc. These industrial equipment with RS422 bus interfaces need to use serial screens after data visualization, but because of the RS422 interface, serial screens cannot be used directly, and additional signal converters are required, which is inconvenient to use and has low practicality. Utility Model Content
[0004] The purpose of this application is to provide a serial port screen device and a display device, which can achieve the technical effect of improving the practicality of the serial port screen.
[0005] In a first aspect, the present application provides a serial port screen device, including an RS422 to serial port module, a signal processing module and a display screen module;
[0006] The RS422 to serial port module comprises an RS422 to serial port chip, the input end of the RS422 to serial port chip is connected to the RS422 bus, the output end of the RS422 to serial port chip is connected to the input end of the signal processing module, and the RS422 to serial port chip outputs a TTL level signal to the signal processing module;
[0007] The output end of the signal processing module is connected to the display screen module, and the signal processing module outputs a video signal to the display screen module.
[0008] In the above implementation process, the serial port screen device is provided with an RS422 to serial port module. Through the RS422 to serial port chip in the RS422 to serial port module, the received RS422 signal can be converted into a TTL level signal. After the TTL level signal is processed accordingly by the signal processing module, it can be directly transmitted to the display screen module to realize the screen display of the signal. Compared with the traditional serial port screen, the serial port communication of the serial port screen device can directly use RS422 communication, without changing the original serial port screen architecture or adding additional conversion modules, thereby achieving the technical effect of improving the practicality of the serial port screen.
[0009] Furthermore, the RS422 to serial port module also includes an RS422 interface socket, which is connected to the RS422 bus and the RS422 to serial port chip respectively, and the RS422 bus transmits RS422 signals to the RS422 to serial port chip through the RS422 interface socket.
[0010] In the above implementation process, the RS422 interface socket is provided to enable the RS422 to serial port module 100 to receive the RS422 signal of the RS422 bus 400 .
[0011] Furthermore, the RS422 to serial port module also includes a protection circuit, and the protection circuit is connected to the RS422 interface socket and the RS422 to serial port chip respectively.
[0012] In the above implementation process, the current limiting protection of the RS422 to serial port chip is achieved by setting a protection circuit.
[0013] Furthermore, the protection circuit is provided with a plurality of protection current limiting devices, and the RS422 interface socket is connected to the RS422 bus via the plurality of protection current limiting devices.
[0014] Furthermore, the protective current limiting device is a resettable fuse.
[0015] Furthermore, the signal processing module includes a SOC chip, the output end of the RS422 to serial port chip is connected to the input end of the SOC chip, and the output end of the SOC chip is connected to the display screen module.
[0016] In the above implementation process, by setting the SOC chip, the TTL level signal is converted into a video signal and output to the display screen module.
[0017] Furthermore, the RS422 to serial port chip is provided with a first output pin and a second output pin, the SOC chip is provided with a first input pin and a second input pin, the first output pin is connected to the first input pin, and the second output pin is connected to the second input pin.
[0018] Furthermore, the display screen module includes a TFT display screen, and the TFT display screen is connected to the output end of the signal processing module.
[0019] Furthermore, the TFT display screen is provided with a plurality of connection ports, and the TFT display screen is connected to the output end of the signal processing module through the plurality of connection ports.
[0020] In a second aspect, the present application provides a display device, comprising a serial port screen device as described in any one of the first aspects.
[0021] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.
[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 A schematic diagram of the structure of the serial port screen device provided in the embodiment of the present application;
[0025] Figure 2 A circuit diagram of an RS422 to serial port chip provided in an embodiment of the present application;
[0026] Figure 3 A circuit diagram of the RS422 interface provided in the embodiment of the present application;
[0027] Figure 4 A schematic diagram of the connection between the SOC chip and the display screen module provided in an embodiment of the present application. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.
[0029] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0030] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.
[0031] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0032] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.
[0033] RS422 bus, also known as EIA-422 bus, is a series of data transmission protocols that use 4-wire, full-duplex, differential transmission, and multi-point communication. RS422 bus uses balanced transmission and uses unidirectional / non-reversible transmission lines with or without enable ends.
[0034] The embodiment of the present application provides a serial port screen device and a display device, which can be applied to the serial port communication process of the serial port screen; the serial port screen device is provided with an RS422 to serial port module, and the received RS422 signal can be converted into a TTL (Transistor-Transistor Logic) level signal through the RS422 to serial port chip in the RS422 to serial port module, and then the TTL level signal is processed accordingly by the signal processing module, and then directly transmitted to the display screen module to realize the screen display of the signal; compared with the traditional serial port screen, the serial port communication of the serial port screen device can directly use RS422 communication, without changing the original serial port screen architecture, and without adding additional conversion modules, thereby achieving the technical effect of improving the practicality of the serial port screen.
[0035] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the serial port screen device provided in the embodiment of the present application. Figure 2 A circuit diagram of an RS422 to serial port chip provided in an embodiment of the present application; the serial port screen device includes an RS422 to serial port module 100, a signal processing module 200, a display screen module 300, and an RS422 bus 400;
[0036] Exemplarily, the RS422 to serial port module 100 includes an RS422 to serial port chip, the input end of the RS422 to serial port chip is connected to the RS422 bus 400, the output end of the RS422 to serial port chip is connected to the input end of the signal processing module 200, and the RS422 to serial port chip outputs a TTL level signal to the signal processing module;
[0037] Exemplarily, an RS422 to serial port chip is provided through the RS422 to serial port module 100, the input end of the RS422 to serial port chip is used to receive the RS422 signal of the RS422 bus, the output end of the RS422 to serial port chip is used to output a TTL level signal, and the TTL level signal is output to the signal processing module 200, and the signal processing module 200 completes the processing of the TTL level signal;
[0038] Exemplarily, the output end of the signal processing module 200 is connected to the display screen module 300 , and the signal processing module 200 outputs a video signal to the display screen module 300 .
[0039] Exemplarily, after the signal processing module 200 completes processing of the TTL level signal, the signal processing module 200 outputs the video signal to the display screen module 300, and finally the display screen module 300 realizes screen display of the signal;
[0040] In some embodiments, the serial port screen device is provided with an RS422 to serial port module 100. Through the RS422 to serial port chip in the RS422 to serial port module 100, the received RS422 signal can be converted into a TTL (Transistor-Transistor Logic) level signal. After the TTL level signal is processed accordingly by the signal processing module 200, it can be directly transmitted to the display screen module 300 to realize the screen display of the signal. Compared with the traditional serial port screen, the serial port communication of the serial port screen device can directly use RS422 communication, without changing the original serial port screen architecture or adding additional conversion modules, thereby achieving the technical effect of improving the practicality of the serial port screen.
[0041] See also Figure 3 , Figure 3 A circuit diagram of the RS422 interface provided in an embodiment of the present application.
[0042] Exemplarily, the RS422 to serial port module 100 further includes an RS422 interface socket, which is respectively connected to the RS422 bus 400 and the RS422 to serial port chip, and the RS422 bus 400 transmits RS422 signals to the RS422 to serial port chip via the RS422 interface socket.
[0043] Exemplarily, by providing an RS422 interface socket, the RS422 to serial port module 100 can receive the RS422 signal of the RS422 bus 400 .
[0044] Exemplarily, the RS422-to-serial port module further includes a protection circuit, which is respectively connected to the RS422 interface socket and the RS422-to-serial port chip.
[0045] Exemplarily, by setting a protection circuit, current limiting protection for the RS422 to serial port chip is achieved.
[0046] Exemplarily, the protection circuit is provided with a plurality of protection current limiting devices, and the RS422 interface socket is connected to the RS422 bus via the plurality of protection current limiting devices.
[0047] Exemplarily, the protective current limiting device is a resettable fuse.
[0048] Exemplarily, the signal processing module includes a SOC chip, the output end of the RS422 to serial port chip is connected to the input end of the SOC chip, and the output end of the SOC chip is connected to the display screen module.
[0049] Exemplarily, by setting a SOC chip, the TTL level signal is converted into a video signal and output to the display screen module.
[0050] Exemplarily, the RS422 to serial port chip is provided with a first output pin and a second output pin, the SOC chip is provided with a first input pin and a second input pin, the first output pin is connected to the first input pin, and the second output pin is connected to the second input pin.
[0051] See also Figure 4 , Figure 4 A schematic diagram of the connection between the SOC chip and the display screen module provided in the embodiment of the present application; Figure 4 In the figure, LCD is represented as the display screen module 300.
[0052] Exemplarily, the display screen module 300 includes a TFT display screen, and the TFT display screen is connected to the output end of the signal processing module 200 .
[0053] Exemplarily, the TFT display screen is provided with a plurality of connection ports, and the TFT display screen is connected to the output end of the signal processing module through the plurality of connection ports.
[0054] For example, Figure 4 As shown, the TFT display screen is connected to the SOC chip through multiple connection ports (Red0-7, Blue0-7, Green0-7).
[0055] In some implementations, the present application also provides a display device, the display device comprising: Figures 1 to 4 The serial port screen device shown.
[0056] In some implementation scenarios, combined with Figures 1 to 4 As shown, the RS422 bus signal is converted into a TTL level signal through the RS422 to serial port chip, and the TTL level signal is given to the SOC chip. The SOC chip can parse and process the signal through program logic and generate a video signal, and transmit the video signal to the display screen module 300 for display;
[0057] Alternatively, if Figure 2 , Figure 3 As shown, F5, F6, F7, and F8 at the input end of the RS422 bus interface are resettable fuses (current limiting, protection devices), and D1, D13, D15, and D17 are TVS diodes for overvoltage protection;
[0058] Optionally, after passing through the protection circuit, the RS422 signal is input from pins 5, 6, 7, and 8 of U8, and then converted internally into a TTL level signal and output from pins 2 and 3 of the chip to pins 41 and 42 of the SOC main chip.
[0059] Exemplarily, the serial port screen device provided in the embodiment of the present application has at least the following advantages:
[0060] 1. Compared with the traditional serial port screen, the serial port communication has been changed to RS422 bus interface, and RS422 communication can be used directly;
[0061] 2. Low cost, only need to add an RS422 to serial port chip, no need to change the original serial port screen architecture, and add additional conversion modules.
[0062] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.
[0063] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.
[0064] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
[0065] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A serial port screen device, characterized in that: Including RS422 to serial port module, signal processing module and display screen module; The RS422 to serial port module comprises an RS422 to serial port chip, the input end of the RS422 to serial port chip is connected to the RS422 bus, the output end of the RS422 to serial port chip is connected to the input end of the signal processing module, and the RS422 to serial port chip outputs a TTL level signal to the signal processing module; The output end of the signal processing module is connected to the display screen module, and the signal processing module outputs a video signal to the display screen module.
2. The serial port screen device according to claim 1, characterized in that: The RS422 to serial port module also includes an RS422 interface seat, which is connected to the RS422 bus and the RS422 to serial port chip respectively. The RS422 bus transmits RS422 signals to the RS422 to serial port chip through the RS422 interface seat.
3. The serial port screen device according to claim 2, characterized in that: The RS422 to serial port module also includes a protection circuit, and the protection circuit is connected to the RS422 interface seat and the RS422 to serial port chip respectively.
4. The serial port screen device according to claim 3, characterized in that: The protection circuit is provided with a plurality of protection current limiting devices, and the RS422 interface socket is connected to the RS422 bus via the plurality of protection current limiting devices.
5. The serial port screen device according to claim 4, characterized in that: The protective current limiting device is a resettable fuse.
6. The serial port screen device according to claim 1, characterized in that: The signal processing module includes a SOC chip, the output end of the RS422 to serial port chip is connected to the input end of the SOC chip, and the output end of the SOC chip is connected to the display screen module.
7. The serial port screen device according to claim 6, characterized in that: The RS422 to serial port chip is provided with a first output pin and a second output pin, and the SOC chip is provided with a first input pin and a second input pin, the first output pin is connected to the first input pin, and the second output pin is connected to the second input pin.
8. The serial port screen device according to claim 7, characterized in that: The display screen module includes a TFT display screen, and the TFT display screen is connected to the output end of the signal processing module.
9. The serial port screen device according to claim 8, characterized in that: The TFT display screen is provided with a plurality of connection ports, and the TFT display screen is connected to the output end of the signal processing module through the plurality of connection ports.
10. A display device, characterized in that: It comprises the serial port screen device as described in any one of claims 1 to 9.