CN205961346U - Extended infrared remote control circuit - Google Patents

Abstract

The utility model discloses an extended infrared remote control circuit, which includes an infrared remote control receiving module and a remote control switching circuit; the remote control switching circuit includes a first interface; the infrared remote control receiving module includes a second interface; the first interface is provided with a second interface. The third pin and the fifth pin; when the first interface is not connected to the second interface, the third pin is connected to the fifth pin, and the fifth pin will receive the The infrared remote control signal is transmitted to the MCU through the third pin; when the first interface is connected to the second interface, the third pin and the fifth pin are disconnected, and the infrared The infrared remote control signal received by the remote control receiving module is transmitted to the MCU through the third pin. The utility model can realize that the equipment equipped with the extended infrared remote control circuit can learn from other external equipment through infrared, realize remote controller sharing, reduce the types of remote controllers, and simplify daily use operations.

Description

An extended infrared remote control circuit

technical field

The utility model belongs to the technical field of remote control and specifically designs an infrared remote control circuit extended on non-infrared remote control equipment.

Background technique

With the development of digital TV, there are more and more digital TVs, but the early non-digital TV still has a certain market share. In order to realize digital TV, end users or telecom operators will add a digital set-top box to realize digital TV functions.

Refer to Figure 1. Non-digital TV remote control and digital set-top box remote control are generally controlled by infrared. The non-digital TV remote control can learn from the infrared remote control of the digital set-top box at home, read the code value of the set-top box remote control, and share a remote control. Simplify the operation of the remote control and reduce the types of remote control at home.

However, with the development of 2.4G wireless technology, 2.4G transmission distance is longer, the angle is wider, and the sensitivity is higher. There are more and more TVs using 2.4G wireless remote control, but 2.4G remote control cannot be connected with external devices such as set-top boxes. Shared remote control, if this function is to be realized, an infrared switching circuit must be added. It is more complicated to add this switching circuit to the whole machine, and the software and hardware have to be changed a lot.

Utility model content

The technical problem to be solved by the utility model is to provide an extended infrared remote control circuit, which can realize the sharing of remote controls between devices equipped with the extended infrared remote control circuit and other external devices through infrared learning, reduce the types of remote controls, and simplify daily use operate.

In order to solve the above problems, the utility model provides an extended infrared remote control circuit, including an infrared remote control receiving module and a remote control switching circuit; the remote control switching circuit includes a first interface; the infrared remote control receiving module includes a second interface; through the The first interface is connected to the second interface so that the remote control switching circuit is connected to the infrared remote control receiving module;

The first interface is provided with a third pin and a fifth pin;

When the first interface is not connected to the second interface, the third pin is connected to the fifth pin, the fifth pin is used to receive non-infrared remote control signals, and the third pin Transmitting the non-infrared remote control signal to the MCU;

When the first interface is connected to the second interface, the second interface disconnects the connection between the third pin and the fifth pin, and the infrared remote control signal received by the infrared remote control receiving module transmitted to the MCU through the third pin.

Compared with the prior art, the utility model provides an extended infrared remote control circuit, by adding the first interface as an infrared interface on the equipment of non-infrared remote control signal, using the pin detection of the first interface, when connected to the infrared When the remote control receiving module is used, the switching from non-infrared remote control to infrared remote control is realized. Without adding a complex infrared switching circuit to the device and making major changes to the device's hardware and software, the device equipped with the extended infrared remote control circuit can learn from other external devices through infrared to realize the sharing of remote controls and reduce the types of remote controls , to simplify daily use operations.

Further, the non-infrared remote control signal is a 2.4G remote control signal.

Preferably, the first interface is an earphone jack; the second interface is an earphone plug.

As a preferred option of the present utility model, the pins of the earphone socket are skillfully used to detect the connected infrared remote control receiving equipment provided with the earphone plug, so as to realize switching from non-infrared remote control to infrared remote control. Small changes.

Preferably, the fifth pin is provided with a metal shrapnel, and when the first interface is not connected to the second interface, the metal shrapnel contacts the third pin to realize the fifth pin Communication with the third pin; when the first interface is connected to the second interface, the second interface prompts the metal shrapnel to bounce off the third pin.

As a preference of the present utility model, the fifth pin is provided with a metal shrapnel, and the fifth pin contacts the third pin through the metal shrapnel to realize the connection between the third pin and the fifth pin, and the non-infrared control signal is transmitted from the fifth lead After the receiving pin is received, it is sent to the MCU through the third pin. When the first interface is connected to the second interface, the second interface prompts the metal shrapnel to bounce off the third pin, and the infrared remote control signal received by the infrared remote control receiving module passes through the third pin. The pins are transmitted to the MCU, and the switch from non-infrared remote control to infrared remote control can be realized through this design. The structure is simple and easy to implement.

Further, the extended infrared remote control circuit also includes a rectification and filtering circuit and a pull-up circuit; the third pin is connected to the MCU by connecting the rectification and filtering circuit and the pull-up circuit.

Further, the rectification filter circuit includes a filter capacitor and a rectifier diode; wherein

One end of the filter capacitor is connected to the third pin, and the other end of the filter capacitor is grounded;

The cathode of the rectifier diode is connected to the third pin, and the anode of the rectifier diode is grounded.

Further, the pull-up circuit also includes a pull-up resistor, a voltage divider resistor and a standby power supply;

One end of the pull-up resistor is connected to the third pin, and the other end of the pull-up resistor is connected to the standby power supply;

One end of the voltage dividing resistor is connected to the third pin, and the other end of the voltage dividing resistor is connected to the MCU.

Further, the first interface further includes a first pin and a fourth pin; wherein, the first pin is grounded, and the fourth pin is connected to a DC power supply.

Further, when the first interface is connected to the second interface, the fourth pin is connected to the power supply end of the infrared remote control receiving module.

Further, the first interface is further provided with a second pin and a sixth pin, and both the second pin and the sixth pin are floating pins.

Description of drawings

Fig. 1 is the block diagram of non-digital TV and digital set-top box independent remote controller that adopt infrared remote control in the prior art;

Fig. 2 is a module schematic diagram of an embodiment of an extended infrared remote control of the present invention;

Fig. 3 is a circuit structure diagram of an embodiment of an extended infrared remote control of the present invention, which is sequentially connected to a remote control switching circuit, a filter rectifier circuit and a pull-up circuit;

Fig. 4 is a block diagram of an embodiment of an infrared remote control of the present invention applied to a common remote control of a non-digital TV and a digital set-top box using 2.4G remote control.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 2 , an embodiment of the present invention provides an extended infrared remote control circuit. This embodiment includes a remote control switching circuit 1 and an infrared remote control receiving module 2; the infrared remote control receiving module is used to receive infrared remote control signals, and the carrier frequency is 38kHz.

The remote control switching circuit 1 includes an earphone jack 11; the infrared remote control receiving module 2 includes an earphone plug 21;

Referring to Fig. 3, the earphone jack 11 is provided with first pin 101, second pin 102, third pin 103, fourth pin 104, fifth pin 105 and sixth pin 106; The pin 101 is grounded; the second pin 102 and the sixth pin 106 are suspended; the fourth pin 104 is connected to the DC power supply; the fifth pin 105 is provided with a metal shrapnel.

When the earphone socket 11 is not connected to the earphone plug 21, the metal shrapnel provided on the fifth pin 105 contacts with the third pin 103, and at this moment, the fifth pin 105 and the third pin 103 are connected; The pin 105 is used to receive non-infrared remote control signals, and the non-infrared remote control signals received by the fifth pin 105 are transmitted to the MCU through the third pin 103 .

When the earphone socket 11 is connected to the earphone plug 21, the earphone plug 21 prompts the metal shrapnel provided on the fifth pin 105 to bounce off the third pin 103, that is, the earphone plug 21 disconnects the third pin 103 and the fifth pin. The connection of the pin 105; at this moment, only the infrared remote control signal received by the infrared remote control receiving module 2 is transmitted to the MCU through the third pin 103;

The fourth pin 104 is connected to the power supply end of the connected infrared remote control receiving module 2 .

Referring to FIG. 2 , the extended infrared remote control circuit 1 also includes a rectification and filtering circuit 3 and a pull-up circuit 4 ; the third pin 103 is connected to the MCU by sequentially connecting the rectification and filtering circuit 3 and the pull-up circuit 4 .

Referring to Fig. 3, the rectification and filtering circuit 3 includes a filter capacitor CK6 and a rectification diode DK9; wherein

One end of the filter capacitor CK6 is connected to the third pin 103, and the other end of the filter capacitor CK6 is grounded;

The cathode of the rectifier diode DK9 is connected to the third pin 103 , and the anode of the rectifier diode DK9 is grounded.

Specifically, the pull-up circuit 4 also includes a pull-up resistor RK18, a voltage dividing resistor RK19 and a standby power supply STB;

One end of the pull-up resistor RK18 is connected to the third pin 103, and the other end of the pull-up resistor RK18 is connected to the standby power supply STB;

One end of the voltage dividing resistor RK19 is connected to the third pin 103 , and the other end of the voltage dividing resistor RK19 is connected to the MCU.

During specific implementation, when the earphone jack 11 is not connected to the earphone plug 21, that is, when the remote control switching circuit 1 is not connected to the infrared remote control receiving module 2, the metal shrapnel provided with the fifth pin 105 realizes the third pin by contacting the third pin 103. The connection between the pin 103 and the fifth pin 105, the fifth pin passes the received non-infrared remote control signal through the third pin 103, and the non-infrared remote control signal passed through the third pin 103 passes through the filter rectifier circuit 3 and pull-up After processing by circuit 4, it is transmitted to the MCU.

When the earphone socket 11 is connected to the earphone plug 21, that is, when the remote control switching circuit 1 is connected to the infrared remote control receiving module 2, the metal shrapnel provided on the fifth pin 105 is pushed away from the third pin 103 due to the intervention of the earphone plug 21 , the connection between the third pin 103 and the fifth pin 105 is disconnected; at this time, only the infrared remote control signal received by the infrared remote control receiving module 2 passes through the third pin 103; the infrared remote control signal through the third pin 103 passes through The filtering and rectifying circuit 3 and the pull-up circuit 4 are processed and then transmitted to the MCU.

Referring to Fig. 4, this embodiment of Fig. 4 is applicable to non-digital TVs adopting 2.4G wireless remote control, and the extended infrared remote control circuit provided by this embodiment is added on non-digital TVs adopting 2.4G wireless remote control. When the remote control switching circuit is connected to the infrared remote control receiving module, the remote control mode of the non-digital TV that uses 2.4G wireless remote control is switched to infrared remote control. Through the learning function of the remote control, the infrared remote control of the set-top box or other household equipment can be used to control the TV. control, thereby reducing the types of remote controls and simplifying daily operations.

In addition, in an embodiment of an extended infrared remote control circuit of the present invention, only a headphone socket 11 and an infrared remote control receiving module 2 need to be cleverly added to the non-digital TV adopting 2.4G remote control, and the pins of the headphone socket 11 are connected to Infrared remote control receiver module 2 detects, and the earphone plug 21 prompts the third pin 103 and the fifth pin 105 that were connected to be disconnected, so that the third pin 103 is converted from transmitting 2.4G remote control signals to infrared remote control signals ; Realize the switch from non-infrared remote control to infrared remote control, the method is simple, without adding complex switching circuits and modifying software inside the TV, the function of remote control learning and sharing can be achieved.

In addition, through the implementation form of the earphone interface, end customers can freely choose whether to multiplex the remote controllers of non-digital TVs and set-top boxes. Earphone jack 11 is inserted into the earphone plug 21 that infrared remote control receiving module 2 is provided with; The operation is convenient and simple, which improves the user experience.

In this embodiment, the remote control switching circuit 1 is connected to the infrared remote control receiving module 2 by connecting the earphone jack 11 to the earphone plug 21. In addition, the remote control switching circuit 1 can be connected to the infrared remote control receiving module through other types of The interface implements the switching of the remote control mode in this embodiment, so as to achieve the purpose of this embodiment, which is also within the protection scope of the present utility model.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and deformations can also be made, these improvements and deformations It is also regarded as the protection scope of the present utility model.

Claims (10)

1. An extended infrared remote control circuit, characterized in that, the extended infrared remote control circuit comprises an infrared remote control receiving module and a remote control switching circuit; the remote control switching circuit comprises a first interface; the infrared remote control receiving module comprises a second interface; accessing the second interface through the first interface, so as to realize the access of the remote control switching circuit to the infrared remote control receiving module; The first interface is provided with a third pin and a fifth pin; When the first interface is not connected to the second interface, the third pin is connected to the fifth pin, the fifth pin is used to receive non-infrared remote control signals, and the third pin Transmitting the non-infrared remote control signal to the MCU; When the first interface is connected to the second interface, the second interface disconnects the connection between the third pin and the fifth pin, and the infrared remote control signal received by the infrared remote control receiving module transmitted to the MCU through the third pin. 2. The extended infrared remote control circuit according to claim 1, wherein the non-infrared remote control signal is a 2.4G remote control signal. 3. The extended infrared remote control circuit according to claim 1, wherein the first interface is an earphone jack; the second interface is an earphone plug. 4. The extended infrared remote control circuit according to claim 1, wherein the fifth pin is provided with a metal shrapnel, and when the first interface is not connected to the second interface, through the metal shrapnel contacting the third pin so as to realize the communication between the fifth pin and the third pin; when the first interface is connected to the second interface, the second interface prompts the metal dome pop off the third pin. 5. The extended infrared remote control circuit according to claim 1, characterized in that, the extended infrared remote control circuit also includes a rectification filter circuit and a pull-up circuit; the third pin connects the rectification filter circuit and the The pull-up circuit thus realizes the connection with the MCU. 6. The extended infrared remote control circuit as claimed in claim 5, wherein the rectification filter circuit comprises a filter capacitor and a rectifier diode; wherein One end of the filter capacitor is connected to the third pin, and the other end of the filter capacitor is grounded; The cathode of the rectifier diode is connected to the third pin, and the anode of the rectifier diode is grounded. 7. The extended infrared remote control circuit as claimed in claim 5, wherein the pull-up circuit also includes a pull-up resistor, a voltage dividing resistor and a standby power supply; One end of the pull-up resistor is connected to the third pin, and the other end of the pull-up resistor is connected to the standby power supply; One end of the voltage dividing resistor is connected to the third pin, and the other end of the voltage dividing resistor is connected to the MCU. 8. The extended infrared remote control circuit according to claim 1, wherein the first interface further comprises a first pin and a fourth pin; wherein, the first pin is grounded, and the fourth pin The pin is connected to a DC power supply. 9. The extended infrared remote control circuit according to claim 8, wherein when the first interface is connected to the second interface, the fourth pin is connected to the power supply terminal of the infrared remote control receiving module. 10. The extended infrared remote control circuit according to claim 1, wherein the first interface is also provided with a second pin and a sixth pin, and both the second pin and the sixth pin are For the floating pin.