Interface access wake-up circuit

Abstract

The utility model discloses an interface access wake-up circuit, which relates to the field of equipment wake-up, and comprises an access signal receiving module used for receiving an input access signal and sending an electric signal to a signal feedback module when an interface of external equipment is accessed; the signal feedback module is used for changing the magnitude of the voltage signal output to the main chip after receiving the input of the access signal, and the main chip wakes up the equipment; the self-locking anti-interference module is used for maintaining the working state of the signal feedback module after the equipment is awakened; the access signal receiving module is connected with the signal feedback module, and the self-locking anti-interference module is connected with the signal feedback module; compared with the prior art, the utility model has the beneficial effects that: when the display equipment is in a standby state, the equipment can be awakened through the access of an external high-definition video interface, and screen projection speech is realized through one-key access, automatic power-on and automatic signal source jump; and a single chip microcomputer and software are not involved, the cost is low, and the logic is simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of equipment awakening, specifically an interface access awakening circuit. BACKGROUND

[0002] The display, TV, advertising machine, education machine, conference machine and other equipment on the market need to be frequently accessed when demonstrating at the exhibition meeting, and the cost is large and the logic is complex by using single-chip microcomputer or software control, which needs to be improved. UTILITY MODEL CONTENT

[0003] The utility model aims at providing an interface access awakening circuit to solve the problems in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] An interface access awakening circuit comprises:

[0006] An access signal receiving module is used for receiving the input access signal when the interface of the external equipment is accessed, and sending the electric signal to the signal feedback module;

[0007] A signal feedback module is used for changing the voltage signal size output to the main chip after the access signal is input, and awakening the equipment by the main chip;

[0008] A self-locking anti-interference module is used for maintaining the working state of the signal feedback module after the equipment is awakened;

[0009] The access signal receiving module is connected with the signal feedback module, and the self-locking anti-interference module is connected with the signal feedback module.

[0010] As a further scheme of the utility model, the external equipment is accessed through the type-C interface, HDMI interface and DP interface.

[0011] As a further scheme of the utility model, the access signal receiving module comprises double-input diodes QC13 and QC14, the first input end of the double-input diode QC13 is connected with the input signal CC_Connect of the type-C interface through the resistance RU38, the second input end of the double-input diode QC13 is connected with the input signal +5V_HDMI3 of the HDMI interface through the resistance RU29, the first input end of the double-input diode QC14 is connected with the input signal DPAUXN1 of the DP interface through the resistance RU37, and the output end of the double-input diode QC13 is connected with the output end of the double-input diode QC14 and the signal feedback module.

[0012] As a further scheme of the utility model: the signal feedback module includes resistance RU31, capacitor CL44, triode QE10, one end of resistance RU31 is connected with one end of capacitor CL44, accesses the signal receiving module, the other end of resistance RU31 is grounded, the other end of capacitor CL44 is connected with one end of resistance RU32 and one end of resistance RU33, the other end of resistance RU32 is grounded, the other end of resistance RU33 is connected with self-locking anti-interference module and the base of triode QE10, the emitter of triode QE10 is grounded, and the collector of triode QE10 is connected with main chip.

[0013] As a further scheme of the utility model: the self-locking anti-interference module includes MOS tube QE9, the S pole of MOS tube QE9 is grounded, the G pole of MOS tube QE9 is connected with signal + 3.3V_Normal through resistance RU34, and the D pole of MOS tube QE9 is connected with signal feedback module through resistance RU36.

[0014] Compared with the prior art, the utility model has the advantages that: the utility model can realize the wake-up of the device through the external high-definition video interface access in the standby condition of the display device, realizes the one-key access, automatic start, signal source automatic jump and screen projection speech, and does not involve single-chip microcomputer and software, so the cost is low and the logic is simple. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a circuit diagram of interface access wake-up circuit.

[0016] Figure 2 It is a circuit diagram of type-C interface.

[0017] Figure 3 It is a circuit diagram of HDMI interface.

[0018] Figure 4 It is a circuit diagram of DP interface. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.

[0020] Please refer to Figure 1 An interface access wake-up circuit, comprising:

[0021] The signal receiving module is used for receiving the input access signal when the interface of the external device is accessed, and sending the electric signal to the signal feedback module.

[0022] signal feedback module, for receiving the input of access signal, changing the size of voltage signal output to main chip, and waking up the device by main chip;

[0023] self-locking anti-interference module, for maintaining the working state of signal feedback module after the device is woken up;

[0024] The access signal receiving module is connected with the signal feedback module, and the self-locking anti-interference module is connected with the signal feedback module.

[0025] In the embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the external device is accessed through the type-C interface, the HDMI interface and the DP interface.

[0026] In the embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the access signal receiving module includes double-input diode QC13 and double-input diode QC14, the first input end of the double-input diode QC13 is connected with the input signal CC_Connect of the type-C interface through the resistance RU38, the second input end of the double-input diode QC13 is connected with the input signal +5V_HDMI3 of the HDMI interface through the resistance RU29, the first input end of the double-input diode QC14 is connected with the input signal DPAUXN1 of the DP interface through the resistance RU37, and the output end of the double-input diode QC13 is connected with the output end of the double-input diode QC14 and the signal feedback module.

[0027] Please refer to Figure 2 , Figure 2 , which is the circuit diagram of the type-C interface. When the external device is accessed through the type-C interface, the CC_Connect will be set to high as 3.3V.

[0028] Please refer to Figure 3 , Figure 3 , which is the circuit diagram of the HDMI interface. When the external device is accessed through the HDMI interface, the 18th pin of the HDMI interface, +5V_HDMI3, will be set to high as 5V positive voltage.

[0029] Please refer to Figure 4 , Figure 4 , which is the circuit diagram of the DP interface. When the external device is accessed through the DP interface, the 17th pin DPAUXN1 of the DP interface is low by default, and is high as 3.3V when accessed.

[0030] Therefore, when the interface of the display, TV, advertising machine, education machine, conference machine and the like accesses the display device through the type-C interface or the HDMI interface or the DP interface, the double-input diode QC13 or the double-input diode QC14 has one output high level to the signal feedback module.

[0031] In the embodiment, please refer to Figure 1 The signal feedback module comprises the resistor RU31, the capacitor CL44 and the triode QE10, one end of the resistor RU31 is connected to one end of the capacitor CL44 and accesses the signal receiving module, the other end of the resistor RU31 is grounded, the other end of the capacitor CL44 is connected to one end of the resistor RU32 and one end of the resistor RU33, the other end of the resistor RU32 is grounded, the other end of the resistor RU33 is connected to the self-locking anti-interference module and the base of the triode QE10, the emitter of the triode QE10 is grounded, and the collector of the triode QE10 is connected to the main chip.

[0032] In the transient state of the type-c interface or the HDMI interface or the DP interface, the capacitor CL44 is instantaneously conducted, a capacitive charging transient pulse is formed and flows to the base of the triode QE10, the triode QE10 is turned on, the KEY1_in becomes low level, the main chip detection foot detects the low level signal, and the display device is switched from the standby state to the on state, and the device is woken up.

[0033] In the embodiment, please refer to Figure 1 The self-locking anti-interference module comprises the MOS tube QE9, the S pole of the MOS tube QE9 is grounded, the G pole of the MOS tube QE9 is connected to the signal +3.3V_Normal through the resistor RU34, and the D pole of the MOS tube QE9 is connected to the signal feedback module through the resistor RU36.

[0034] After the device is woken up, the +3.3V_Normal is a 3.3V positive voltage (0V voltage when not woken up) input to the G pole of the MOS tube QE9, the MOS tube QE9 is turned on, the resistors RU33 and RU36 form a voltage divider circuit to pull down the base voltage of the triode QE10, the base voltage of the triode QE10 is divided to be less than 0.7V, in the on state, no matter how many times the type-c interface or the HDMI interface or the DP interface is accessed, the pulse formed by the charging of the capacitor CL44 will be divided to be less than 0.7V by the resistors RU33 and RU36, and the MOS tube QE9 is turned on to the ground, forming a voltage divider circuit, which will not affect the on state of the triode QE10, only in the standby state, the standby wake-up on state is formed, the interference is reduced, and the triode QE10 is prevented from being turned on by mistake.

[0035] The working principle of the utility model is: the access signal receiving module is used for receiving the input access signal when the interface of the external device is accessed, and sending the electric signal to the signal feedback module; the signal feedback module is used for changing the voltage signal size output to the main chip after the access signal is input, and the main chip wakes up the device; the self-locking anti-interference module is used for maintaining the working state of the signal feedback module after the device is woken up.

[0036] The prior art interface access wake-up utilizes single-chip microcomputer or software control, needs to keep working all the time in standby condition, consumes energy, generates serious heat, has large standby power; has large cost and complex logic; cannot realize one-key access, wake-up device, signal source automatic switching and screen projection.

[0037] The utility model discloses a display device in standby condition can realize waking up the device through the external high-definition video interface access, achieve one-key access, automatic start, signal source automatic switching to realize screen projection speech, and do not involve single-chip microcomputer and software, low cost, simple logic.

[0038] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting.

[0039] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by those skilled in the art.

Claims

1. An interface access wake-up circuit, characterized in that, The interface connects to the wake-up circuit, including: The access signal receiving module is used to receive the input access signal and send an electrical signal to the signal feedback module when an external device's interface is connected. The signal feedback module is used to receive the voltage signal that changes the output to the main chip after the input signal is received, and the main chip wakes up the device. The self-locking anti-interference module is used to maintain the working state of the signal feedback module after the device is woken up; The signal receiving module is connected to the signal feedback module, and the self-locking anti-interference module is also connected to the signal feedback module.

2. The interface access wake-up circuit according to claim 1, characterized in that, External devices can be connected via Type-C, HDMI, or DisplayPort interfaces.

3. The interface access wake-up circuit according to claim 1 or 2, characterized in that, The signal receiving module includes dual-input diodes QC13 and QC14. The first input terminal of dual-input diode QC13 is connected to the input signal CC_Connect of the Type-C interface through resistor RU38. The second input terminal of dual-input diode QC13 is connected to the input signal +5V_HDMI3 of the HDMI interface through resistor RU29. The first input terminal of dual-input diode QC14 is connected to the input signal DPAUXN1 of the DP interface through resistor RU37. The output terminal of dual-input diode QC13 is connected to the output terminal of dual-input diode QC14 and the signal feedback module.

4. The interface access wake-up circuit according to claim 1, characterized in that, The signal feedback module includes a resistor RU31, a capacitor CL44, and a transistor QE10. One end of the resistor RU31 is connected to one end of the capacitor CL44 and connected to the signal receiving module. The other end of the resistor RU31 is grounded. The other end of the capacitor CL44 is connected to one end of the resistor RU32 and one end of the resistor RU33. The other end of the resistor RU32 is grounded. The other end of the resistor RU33 is connected to the self-locking anti-interference module and the base of the transistor QE10. The emitter of the transistor QE10 is grounded. The collector of the transistor QE10 is connected to the main chip.

5. The interface access wake-up circuit according to claim 1, characterized in that, The self-locking anti-interference module includes a MOSFET QE9. The source (S) of the MOSFET QE9 is grounded, the gate (G) of the MOSFET QE9 is connected to the signal +3.3V_Normal through a resistor RU34, and the drain (D) of the MOSFET QE9 is connected to the signal feedback module through a resistor RU36.

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