Multipath input / output control signal conversion circuit and television thereof
By designing a multi-input and output control signal conversion circuit, the RS232 signal is converted into an IR signal, which solves the problem that modern devices that do not support RS232 communication cannot realize RS232 control, and achieves strong compatibility and multi-function control.
Patent Information
- Application Number
- CN202421750533.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The prior art is difficult to enable modern devices that do not support RS232 communications, such as smart TVs, to implement RS232 control, resulting in problems of single compatibility and functionality.
A multi-channel input and output control signal conversion circuit is designed, and the RS232 signal is converted into a TTL signal through the first control chip U1, and the second control chip U2 converts the TTL signal into an IR signal to realize control of the TV motherboard.
It realizes compatibility of the RS232 protocol, can be compatible with modern devices that do not support the RS232 protocol, and expands control functions, allowing users to perform multiple control methods through the RS232 protocol, remote control or other infrared signals.
Smart Images
Figure CN222996599U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a multi-channel input / output control signal conversion circuit, belonging to the field of electronic technology. Background Art
[0002] As a long-established serial communication standard, the RS232 interface still plays an irreplaceable role in some fields even today when modern high-speed communication technologies emerge in an endless stream. With its characteristics of stability, reliability and relatively low requirements for devices, it maintains a certain market share in the fields of industrial automation, remote monitoring, data acquisition, etc.
[0003] The RS232 interface can achieve full-duplex communication, that is, send and receive data simultaneously, which makes it very suitable for real-time data exchange. Due to the clarity of its electrical characteristics and protocol definitions, the RS232 interface can provide a clear and reliable data channel when connecting a computer and external devices. For example, in an environmental monitoring system, sensors connected through the RS232 interface can transmit environmental parameters such as temperature, humidity, and pressure to the computer in real time for data recording and analysis.
[0004] However, with the development of technology, some new devices, such as smart TVs (TVs), may no longer provide the traditional RS232 interface and instead adopt more modern communication protocols, such as HDMI-CEC, network communication, etc. This poses some challenges for users who hope to use the RS232 interface for control and monitoring. To address this issue, this patent enables devices that originally do not support RS232 communication to achieve RS232 control through an innovative conversion circuit.
[0005] Currently, mainstream TV devices adopt more modern communication interfaces, such as USB, Ethernet or Wi-Fi, etc., instead of using RS232 to transmit data, which has some deficiencies:
[0006] 1. For old devices or systems that still use the RS232 interface, devices without the RS232 interface may not be able to directly connect and communicate. Additional adapters or converters are required, increasing complexity and cost;
[0007] 2. Compared with RS232, some modern interfaces (such as USB) may be limited in transmission distance. If long-distance communication is required, additional network infrastructure or relay devices may be needed;
[0008] 3. The functions are relatively single, and the TV can only be controlled with the TV remote control. Summary of the Utility Model
[0009] To overcome the deficiencies of the prior art, the present utility model provides a multi-channel input / output control signal conversion circuit. The technical solution of the present utility model is as follows:
[0010] A multi-channel input / output control signal conversion circuit includes a first control chip U1, a second control chip U2, a PC host, a TV main board, and a DVD. The PC host and the DVD are both connected to the TV main board. The PC host is connected to the input port of interface J8 through the RS232 protocol. The second output port of this interface J8 is connected to the 13th input port of the first control chip U1, and the third output port of this interface J8 is connected to the 14th input port of the first control chip U1. The 11th output port of the first control chip U1 is connected to the 17th input port of the second control chip U2, the 12th output port of the first control chip U1 is connected to the 16th input port of the second control chip U2, the 13th output port of the second control chip U2 is connected to the fourth port of interface J6, and the output port of this interface J6 is connected to the TV main board mentioned above. The first control chip U1 converts the RS232 signal into a TTL signal, and the second control chip U2 converts the TTL signal into an IR signal and outputs the IR signal to the TV main board, realizing the control of the TV main board through the RS232 protocol.
[0011] It further includes a remote control. The infrared signal emitted by this remote control is input to the second input port of the second control chip U2 through the fourth output port of interface J7. After the second control chip U2 processes the infrared signal, it is connected to the fourth input port of interface J6 through the 13th output port and outputs the infrared signal to the TV main board through interface J6.
[0012] The infrared signal emitted by the remote control is connected to the input port of interface J7. The fourth output port of this interface J7 is connected to the second input port of the second control chip U2. The fourth output port of this second control chip U2 is connected to the fourth input port of interface J3 and is connected to the TV main board through the said interface J3.
[0013] It further includes an external IR head for receiving infrared signals. After receiving the infrared signal, this external IR head outputs it to interface J2. The fourth output port of this interface J2 is connected to the fifth input port of the second control chip U2. The fourth output port of this second control chip U2 is connected to the fourth input port of interface J3. The external IR head receives the infrared signal and is connected to the control device through interface J3.
[0014] The model of the first control chip U1 is MAX3232ESE.
[0015] The model of the second control chip U2 is PY32F003F16P6TV.
[0016] A television set, including a multiplex input / output control signal conversion circuit.
[0017] The advantages of the present utility model are as follows:
[0018] 1. The RS232 interface has a long history and wide applications, and is compatible with many old devices and systems. This enables the device with this conversion circuit to easily integrate with the existing infrastructure through the serial port;
[0019] 2. This conversion circuit can achieve RS232 communication control and use standards by connecting an external serial port, and has good anti-interference ability and stability. It is suitable for long-distance transmission and can still maintain high-quality data transmission in a busy electromagnetic environment;
[0020] 3. This conversion circuit can achieve more diverse functions. For example, it can not only control the TV with the TV remote control, but also send instructions to control the TV through the computer using this conversion circuit, and can also control the corresponding device with other remote controls. Description of the Drawings
[0021] Figure 1 is a schematic diagram of the main structure of the present utility model.
[0022] Figure 2 is Figure 1 a schematic diagram of the connection relationship between interface J8, interface J6 and the first control chip and the second control chip in
[0023] Figure 3 is Figure 1 a schematic diagram of a connection relationship between interface J7 and interface J6 and the second control chip in
[0024] Figure 4 is Figure 1 a schematic diagram of the connection relationship between interface J7 and J3 and the second control chip in
[0025] Figure 5 is Figure 1 a schematic diagram of the connection relationship between interface J2 and J3 and the second control chip in
[0026] Figure 6 is Figure 1 a circuit diagram of the first control chip in
[0027] Figure 7 is Figure 1 a circuit diagram of the second control chip in
[0028] Figure 8 is Figure 1 a circuit diagram of interface J7 in
[0029] Figure 9 isFigure 1 Circuit diagram of interface J6. Specific implementation mode
[0030] The present utility model will be further described below in conjunction with specific embodiments, and the advantages and features of the present utility model will become clearer as the description progresses. However, these embodiments are merely exemplary and do not constitute any limitation to the scope of the present utility model. Those skilled in the art should understand that without departing from the spirit and scope of the present utility model, modifications or substitutions can be made to the details and forms of the technical solution of the present utility model, but such modifications and substitutions all fall within the protection scope of the present utility model.
[0031] See Figures 1 to 9 , the present utility model relates to a multi-channel input / output control signal conversion circuit, including a first control chip U1, a second control chip U2, a PC host, a TV main board and a DVD. The PC host and the DVD are both connected to the TV main board. As Figure 2 shown, the PC host accesses the input port of interface J8 through the RS232 protocol. The second output port of this interface J8 accesses the 13th input port of the first control chip U1, and the third output port of this interface J8 accesses the 14th input port of the first control chip U1; the 11th output port of this first control chip U1 accesses the 17th input port of the second control chip U2, the 12th output port of this first control chip U1 accesses the 16th input port of the second control chip U2, the 13th output port of this second control chip U2 accesses the 4th port of interface J6, and the output port of this interface J6 accesses the said TV main board; the first control chip U1 converts the RS232 signal into a TTL signal, and the second control chip U2 converts the TTL signal into an IR signal and outputs the IR signal to the TV main board, realizing the control of the TV main board through the RS232 protocol.
[0032] Based on the above structural settings, the following are achieved:
[0033] Strong compatibility: By converting the RS232 signal into a TTL signal and then into an IR signal, this circuit can be compatible with a variety of devices, including modern devices that do not support the RS232 protocol, such as smart TVs.
[0034] High expandability: The first control chip U1 and the second control chip U2 in the design can be configured and programmed according to needs to adapt to different signal conversion requirements, improving the flexibility and expandability of the circuit.
[0035] Easy to integrate: Due to the clear circuit design and the clear interfaces between each component, this makes the circuit easy to integrate into the existing system without large-scale modification of the existing equipment.
[0036] User-friendly: It is controlled using the RS232 protocol. Users can utilize existing computer software and hardware resources without having to learn a new communication protocol, reducing the user's threshold for use.
[0037] As Figure 3 shown, it also includes a remote control. The infrared signal emitted by the remote control is input into the second input port of the second control chip U2 through the fourth output port of interface J7. After the second control chip U2 processes the infrared signal, it is connected to the fourth input port of interface J6 through the thirteenth output port and outputs the infrared signal to the TV main board through interface J6. The setting of this structure realizes:
[0038] Dual control mode: The circuit not only supports control using the RS232 protocol through the PC host, but also can be controlled by the infrared signal emitted by the remote control, providing users with flexible and diverse control options.
[0039] Enhanced user experience: Users can choose to use the remote control or the PC for control according to their habits and environment, improving the convenience and comfort of operation.
[0040] Improved system compatibility: Through the processing of the infrared signal by the second control chip U2, it can ensure that signals emitted by different remote controls can be correctly recognized and converted, improving the system's compatibility.
[0041] Extended control range: The use of the remote control allows users to control the TV at a greater distance without being restricted by the location of the PC host.
[0042] Enhanced signal processing ability: The second control chip U2 simultaneously processes the TTL signal from the PC host and the infrared signal from the remote control, demonstrating its powerful signal processing ability.
[0043] As Figure 4 shown, the infrared signal emitted by the remote control is connected to the input port of interface J7. The fourth output port of this interface J7 is connected to the second input port of the second control chip U2. The fourth output port of this second control chip U2 is connected to the fourth input port of interface J3 and is connected to the TV main board through the said interface J3. The setting of this structure realizes:
[0044] Direct connection: The remote control signal is directly connected through interface J7, simplifying the circuit connection and reducing losses and interference during signal transmission.
[0045] Signal processing ability: The second control chip U2 has signal processing ability, performs necessary conversion and amplification on the infrared signal emitted by the remote control, and ensures the stability and reliability of the signal.
[0046] Enhanced compatibility: Through the processing of the second control chip U2, it can be compatible with remote controls of different brands and models, improving the versatility of the system.
[0047] Flexible signal routing: Through the settings of interfaces J7 and J3, the signal can be flexibly routed to the TV main board, facilitating circuit design and expansion.
[0048] As Figure 5 shown, it also includes an external IR head for receiving infrared signals. After receiving the infrared signals, the external IR head outputs them to interface J2. The 4th output port of interface J2 is connected to the 5th input port of the second control chip U2. The 4th output port of the second control chip U2 is connected to the 4th input port of interface J3. The external IR head receives the infrared signals and accesses the control device through interface J3. Among them, the model of the first control chip U1 is MAX3232ESE; the model of the second control chip U2 is PY32F003F16P6TV. The setting of this structure realizes:
[0049] Modular design: The external IR head is used as a separate module and can be flexibly added or replaced according to needs, facilitating maintenance and upgrading.
[0050] Compatibility: By using standard model control chips U1 (MAX3232ESE) and U2 (PY32F003F16P6TV), the compatibility and interoperability with other devices are ensured.
[0051] Signal conversion efficiency: The MAX3232ESE chip converts the RS232 signal into a TTL level signal, while the PY32F003F16P6TV chip converts the TTL or infrared signal into a signal suitable for the control device. This conversion has high efficiency and low signal loss.
[0052] Flexibility: The external IR head can receive signals from the remote control or other infrared emission sources, increasing the diversity of the control signal sources.
[0053] Easy integration: Interfaces J2 and J3 provide clear connection paths, simplifying the integration process between the external IR head and the control chip.
[0054] The present utility model also relates to a television, including a multi-channel input-output control signal conversion circuit.
[0055] The working principle of the present utility model is:
[0056] RS232 signal access: The PC host sends signals through the RS232 protocol, and these signals access the circuit through interface J8. The 2nd and 3rd output ports of interface J8 are respectively connected to the 13th and 14th input ports of the first control chip U1.
[0057] Signal conversion: The first control chip U1 (model MAX3232ESE) is responsible for converting the received RS232 signal into a TTL signal. MAX3232ESE is a level conversion chip that can convert RS232 level into TTL level suitable for microcontrollers or logic circuits.
[0058] TTL signal transmission: The converted TTL signal is sent to the 17th and 16th input ports of the second control chip U2 through the 11th and 12th output ports of the first control chip U1.
[0059] IR signal generation: The second control chip U2 (model PY32F003F16P6TV) receives the TTL signal and converts it into an infrared (IR) signal. PY32F003F16P6TV is a microcontroller capable of converting TTL signal into an infrared signal.
[0060] IR signal output: The 13th output port of the second control chip U2 sends the generated IR signal to the 4th port of interface J6, and then outputs it to the TV main board through interface J6 to control the TV.
[0061] Remote control: The infrared signal emitted by the remote control is input through the 4th output port of interface J7, and then connected to the 2nd or 5th input port of U2 (the specific port depends on the specific routing of the remote control signal). U2 processes these infrared signals and sends them to interface J6 again through the 13th output port, and finally outputs them to the TV main board.
[0062] External IR head: The external IR head receives infrared signals from the environment or other infrared emission sources and outputs these signals to interface J2. The 4th output port of interface J2 sends the signal into the 5th input port of U2. After U2 processes it, it accesses interface J3 through the 4th output port, and finally sends the signal into the TV main board through interface J3.
[0063] Control device: Whether it is the RS232 signal from the PC host, the infrared signal from the remote control, or the infrared signal received by the external IR head, they are finally processed by U2 and output to the TV main board to control the TV set.
[0064] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present utility model.
Claims
1. A multi-channel input and output control signal conversion circuit, characterized in that: The invention comprises a first control chip U1, a second control chip U2, a PC host, a TV mainboard and a DVD. The PC host and the DVD are both connected to the TV mainboard. The PC host is connected to the input port of the interface J8 through the RS232 protocol. The second output port of the interface J8 is connected to the 13th input port of the first control chip U1, and the third output port of the interface J8 is connected to the 14th input port of the first control chip U1; the 11th output port of the first control chip U1 is connected to the 17th input port of the second control chip U2, the 12th output port of the first control chip U1 is connected to the 16th input port of the second control chip U2, the 13th output port of the second control chip U2 is connected to the 4th port of the interface J6, and the output port of the interface J6 is connected to the TV mainboard; the first control chip U1 converts the RS232 signal into a TTL signal, the second control chip U2 converts the TTL signal into an IR signal, and outputs the IR signal to the TV mainboard, so as to realize the RS232 protocol to control the TV mainboard.
2. The multi-channel input and output control signal conversion circuit according to claim 1, characterized in that: It also includes a remote control, the infrared signal emitted by the remote control is input to the second input port of the second control chip U2 through the fourth output port of the interface J7. After the second control chip U2 processes the infrared signal, it is connected to the fourth input port of the interface J6 through the thirteenth output port, and the infrared signal is output to the TV mainboard through the interface J6.
3. The multi-channel input and output control signal conversion circuit according to claim 2, characterized in that: The infrared signal emitted by the remote control is connected to the input port of interface J7, the 4th output port of interface J7 is connected to the 2nd input port of the second control chip U2, the 4th output port of the second control chip U2 is connected to the 4th input port of interface J3, and connected to the TV mainboard through the interface J3.
4. The multi-channel input and output control signal conversion circuit according to claim 2, characterized in that: It also includes an external IR head for receiving infrared signals, which outputs the received infrared signals to the interface J2. The 4th output port of the interface J2 is connected to the 5th input port of the second control chip U2. The 4th output port of the second control chip U2 is connected to the 4th input port of the interface J3. The external IR head receives the infrared signal and connects to the control device through the interface J3.
5. The multi-channel input and output control signal conversion circuit according to claim 2, characterized in that: The model of the first control chip U1 is MAX3232ESE.
6. The multi-channel input and output control signal conversion circuit according to claim 2, characterized in that: The model of the second control chip U2 is PY32F003F16P6TV.
7. A television set, characterized in that: A multi-channel input / output control signal conversion circuit comprising any one of claims 1 to 6.