Electronic equipment compatible with infrared control

Abstract

The utility model discloses an electronic device compatible with infrared control, which comprises a circuit board, and a control circuit, a light distance circuit and an infrared lamp are integrated on the circuit board. The light distance circuit is connected with the control circuit and the infrared lamp; when the control circuit detects that the infrared key icon is pressed, the light distance circuit is controlled to start an infrared mode; the light distance circuit controls the infrared lamp to emit an infrared signal; the control circuit controls the light distance circuit to start a light distance sensing mode after detecting that the infrared key icon is loosened, and the light distance circuit stops supplying power to the infrared lamp. According to the light distance circuit, on the basis that an existing light distance sensing mode is reserved, the infrared lamp control function is added, compatibility of the infrared emission function and the light distance sensing function is achieved, a special infrared emission drive circuit does not need to be arranged, and cost and occupied space on a circuit board are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic technical field especially is a kind of electronic equipment compatible with infrared control. BACKGROUND

[0002] In existing smart phone, infrared emission function is paid more and more attention, this function can replace remote controller, just a mobile phone can easily operate household appliance, bring more convenience for life.But the infrared emission function designed at present generally adopts independent circuit.The drive circuit design for infrared emission function in smart phone is as shown in Figure 1 When IR_TX signal is low level, NMOS tube Q is cut off, at this time, infrared tube LED is closed;IR_TX signal is high level, NMOS tube Q is turned on, at this time, infrared tube LED is opened light.The drive circuit needs the interface of special purpose that main control chip (such as SOC chip) leads to output IR_TX signal, this interface needs to support PWM waveform output function;The drive circuit needs to set the NMOS tube of large volume, set resistance and capacitance for current-limiting protection;Increase the cost of drive circuit and the space occupation on circuit board.Moreover, the current-limiting of resistance leads to the current of passing through infrared tube LED fixed, so as to adjust the distance of infrared emission.

[0003] Thus, the prior art remains to be improved and improved. CONTENT OF UTILITY MODEL

[0004] In view of the above deficiencies of prior art, the purpose of the utility model is to provide a kind of electronic equipment compatible with infrared control, use the existing light distance sensing circuit on mobile phone to combine development, to solve the problem of the cost of existing infrared emission and the space occupation on circuit board that drive circuit is set.

[0005] In order to achieve the above purpose, the utility model takes the following technical scheme:

[0006] A kind of electronic equipment compatible with infrared control, including a circuit board, the control circuit is integrated on the circuit board, wherein, the light distance circuit and infrared lamp are also integrated on the circuit board;The light distance circuit is connected control circuit and infrared lamp;

[0007] The control circuit detects when infrared key icon is pressed to control light distance circuit to start infrared mode;Light distance circuit controls infrared lamp to emit infrared signal;

[0008] The control circuit detects after infrared key icon is released to control light distance circuit to start light distance sensing mode, and light distance circuit stops power supply to infrared lamp.

[0009] The compatible infrared control electronic device, the optical distance circuit includes an optical distance sensor, the SCL pin, the SDA pin and the INTN pin of the optical distance sensor are connected with the control circuit; the VDD pin of the optical distance sensor is connected with the second power supply end, the LEDA pin of the optical distance sensor is connected with the positive pole of the infrared lamp and the first power supply end, the LEDK pin of the optical distance sensor is connected with the negative pole of the infrared lamp, and the GND pin of the optical distance sensor is grounded.

[0010] The compatible infrared control electronic device, the optical distance circuit further includes a first capacitor, one end of the first capacitor is connected with the positive pole of the infrared lamp and the first power supply end, and the other end of the first capacitor is grounded.

[0011] The compatible infrared control electronic device, the optical distance circuit further includes a first resistor and a second capacitor, one end of the first resistor is connected with one end of the second capacitor and the VDD pin of the optical distance sensor, the other end of the first resistor is connected with the second power supply end, and the other end of the second capacitor is grounded.

[0012] The compatible infrared control electronic device, the optical distance circuit further includes a first anti-static diode, a second anti-static diode and a third anti-static diode; one end of the first anti-static diode is connected with the SCL pin of the optical distance sensor, one end of the second anti-static diode is connected with the SDA pin of the optical distance sensor, and one end of the third anti-static diode is connected with the INTN pin of the optical distance sensor; the other end of the first anti-static diode is connected with the other end of the second anti-static diode, the other end of the third anti-static diode and the ground.

[0013] Compared with the prior art, the compatible infrared control electronic device provided by the utility model, including a circuit board, the control circuit, the optical distance circuit and the infrared lamp are integrated on the circuit board, the optical distance circuit is connected with the control circuit and the infrared lamp, the control circuit detects the infrared key icon is pressed and controls the optical distance circuit to start the infrared mode, the optical distance circuit controls the infrared lamp to emit the infrared signal, the control circuit detects the infrared key icon is released and controls the optical distance circuit to start the optical distance sensing mode, and the optical distance circuit stops power supply to the infrared lamp. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the circuit diagram of the existing infrared emission function driving circuit.

[0015] Figure 2 It is the circuit diagram of the compatible infrared control electronic device provided by the utility model. DETAILED DESCRIPTION

[0016] The utility model provides a kind of electronic equipment compatible with infrared control. To make the purpose, technical scheme and advantage of the utility model more clear, definite, the utility model is further explained in detail below with reference to drawing and example. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0017] Please refer to Figure 2 The utility model provides a kind of electronic equipment compatible with infrared control including a circuit board, the control circuit 10, optical distance circuit 20 and infrared lamp L are integrated on the circuit board;The optical distance circuit 20 is connected control circuit 10 and infrared lamp L.The control circuit 10 detects the I2C signal output when infrared key icon is pressed to control optical distance circuit 20 to start infrared mode;Optical distance circuit 20 controls infrared lamp L to emit infrared signal.Control circuit 10 detects after infrared key icon is released, control optical distance circuit 20 to start optical distance sensing mode, optical distance circuit 20 stops to infrared lamp L power supply, also will not emit infrared signal.Optical distance circuit 20 has increased infrared lamp L control function on the basis of reserving existing optical distance sensing mode, realizes the compatibility of infrared emission and optical distance sensing function, need not to set the drive circuit of special infrared emission, saves cost and space occupation on the circuit board.

[0018] In the embodiment, the control circuit 10 is the existing SOC chip (preferably model is MTK mobile phone platform chip MT6835) and its peripheral circuit composition, it has infrared control function (detects the drive signal output when infrared key icon is pressed to start infrared emission function) and optical distance sensing function.The improvement of the embodiment is, cancel the existing drive circuit (also need not to output IR_TX signal from the interface of control chip special), utilize existing optical distance circuit to improve, so that SOC chip realizes the compatibility of infrared emission and optical distance sensing function by controlling the mode switching of optical distance circuit.SOC chip and its peripheral circuit are not described here.

[0019] Please continue to refer to Figure 2 The optical distance circuit 20 includes optical distance sensing sensor U, the SCL foot, SDA foot and INTN foot of optical distance sensing sensor U are connected control circuit 10 (specifically SCL foot, SDA foot, INTN foot and the special communication protocol serial clock line foot, serial data line foot, interrupt pin of SOC chip one-to-one connection);The VDD foot of optical distance sensing sensor U is connected second power end VIO18_PMU, the LEDA foot of optical distance sensing sensor U is connected the anode of infrared lamp L and first power end VIO28_PMU, the LEDK foot of optical distance sensing sensor U is connected the cathode of infrared lamp L, the GND foot of optical distance sensing sensor U is grounded.

[0020] The light distance sensor U is also called ambient light sensor, and its model is preferably LS9801 of LIFELABS. The light distance sensor U switches the infrared emission and the light distance sensing function according to the I2C signal (SCL1 signal and SDA1 signal) and the enable signal EINT_ALSPS output by the control circuit 10. The specific working principle is as follows:

[0021] Under normal circumstances, the SOC chip outputs the enable signal EINT_ALSPS in high level to control the light distance sensor U to enter the enabled state. The light distance sensor U enables the light distance sensing function according to the data (corresponding to the pulse waveform) of the SCL1 signal and the SDA1 signal. At this time, the LEDK pin of the light distance sensor U is in high impedance state, and the negative electrode of the infrared lamp L is not grounded, so the infrared signal cannot be emitted.

[0022] When the SOC chip detects that the infrared key icon is pressed, it is identified that the infrared needs to be emitted. The SOC chip changes the data content of the SCL1 signal and the SDA1 signal. The light distance sensor U recognizes and disables the light distance sensing function, and switches to the infrared mode, and pulls the LEDK pin of the light distance sensor U to the ground. At this time, the positive and negative electrodes of the infrared lamp L form a current loop, and the infrared lamp L emits light.

[0023] When the SOC chip detects that the infrared key icon is released, it is identified that the infrared emission is paused. At this time, the SOC chip restores the data content of the SCL1 signal and the SDA1 signal. The light distance sensor U recognizes and restores the light distance sensing function.

[0024] The data of the SCL1 signal and the SDA1 signal output by the SOC chip when the infrared key icon is pressed is used to execute the infrared emission control. When the infrared key icon is released, the SOC chip outputs the data of the SCL1 signal and the SDA1 signal according to the existing setting, which is used to execute the light distance sensing function. The existing light distance sensor is fully utilized to be compatible with the infrared emission function, and there is no need to additionally set the existing infrared emission driving circuit. According to the different data of the I2C signal, the automatic switching between the infrared emission and the light distance sensing function can be realized.

[0025] Preferably, considering the case that the controlled object is far away and the infrared device is not responsive due to low emission power, the current flowing through the infrared lamp L is increased to improve the emission power. In the specific implementation, the SOC chip can detect that the infrared key icon is pressed, and the light distance sensing sensor U adjusts the current to 10 mA according to the output of the I2C signal control. The SOC chip detects that the infrared key icon is pressed for more than a first preset time, and the controlled object reacts slowly, indicating that the distance is far away. Then, the light distance sensing sensor U automatically increases the current to 20 mA according to the second data according to the output of the I2C signal control. The current of 20 mA can ensure that the infrared lamp L controls the infrared device within a distance of 8-10 meters.

[0026] Preferably, the light distance circuit 20 further comprises a first capacitor C1, one end of the first capacitor C1 is connected to the positive electrode of the infrared lamp L and the first power supply end VIO28_PMU, and the other end of the first capacitor C1 is grounded. The first capacitor C1 is a filter capacitor for filtering the power supply voltage of the infrared lamp L, so that it is more stable when lit and does not flicker.

[0027] Preferably, the light distance circuit 20 further comprises a first resistor R1 and a second capacitor C2, one end of the first resistor R1 is connected to one end of the second capacitor C2 and the VDD pin of the light distance sensing sensor U, the other end of the first resistor R1 is connected to the second power supply end VIO18_PMU, and the other end of the second capacitor C2 is grounded. The first resistor R1 and the second capacitor C2 constitute an RC filter for filtering the power supply voltage of the light distance sensing sensor U, so that the light distance sensing sensor U works more stably.

[0028] Preferably, the light distance circuit 20 further comprises a first anti-static diode D1, a second anti-static diode D2, and a third anti-static diode D3; one end of the first anti-static diode D1 is connected to the SCL pin of the light distance sensing sensor U, one end of the second anti-static diode D2 is connected to the SDA pin of the light distance sensing sensor U, and one end of the third anti-static diode D3 is connected to the INTN pin of the light distance sensing sensor U; the other end of the first anti-static diode D1 is connected to the other end of the second anti-static diode D2, the other end of the third anti-static diode D3, and the ground. The D1-D3 are used for static protection.

[0029] In summary, the electronic device compatible with infrared control, through detecting whether the infrared key icon is pressed down to output corresponding data I2C signal, the optical distance sensor automatically switches the infrared emission function and the optical distance sensor function according to the data of I2C signal, fully utilizes the existing optical distance sensor to compatible with infrared emission function, without additional setting the existing infrared emission drive circuit, saves the cost, reduces the space occupation on the circuit board;It can also automatically adjust the current flowing through the infrared lamp according to the number of times of pressing the key, change the infrared emission power, meet the demand of long-distance infrared control.

[0030] It should be understood that the application of the utility model is not limited to the above examples, and those skilled in the art can improve or change according to the above description, and all these improvements and changes shall belong to the protection scope of the utility model claims.

Claims

1. An infrared-compatible electronic device, comprising a circuit board on which a control circuit is integrated, characterized in that, The circuit board also integrates a light-diffusing circuit and an infrared lamp; the light-diffusing circuit is connected to the control circuit and the infrared lamp. When the control circuit detects that the infrared button icon is pressed, it controls the optical distance circuit to activate the infrared mode; the optical distance circuit controls the infrared lamp to emit an infrared signal. The control circuit detects when the infrared button icon is released and controls the optical distance circuit to start the optical distance sensing mode, and the optical distance circuit stops supplying power to the infrared lamp.

2. The infrared-compatible electronic device according to claim 1, characterized in that, The optical distance circuit includes an optical distance sensor. The SCL, SDA, and INTN pins of the optical distance sensor are all connected to the control circuit. The VDD pin of the optical distance sensor is connected to the second power supply terminal. The LEDA pin of the optical distance sensor is connected to the positive terminal of the infrared lamp and the first power supply terminal. The LEDK pin of the optical distance sensor is connected to the negative terminal of the infrared lamp. The GND pin of the optical distance sensor is grounded.

3. The infrared-compatible electronic device according to claim 2, characterized in that, The optical distance circuit also includes a first capacitor, one end of which is connected to the positive terminal of the infrared lamp and the first power supply terminal, and the other end of which is grounded.

4. The infrared-compatible electronic device according to claim 2, characterized in that, The optical distance circuit also includes a first resistor and a second capacitor. One end of the first resistor is connected to one end of the second capacitor and the VDD pin of the optical distance sensor. The other end of the first resistor is connected to the second power supply terminal, and the other end of the second capacitor is grounded.

5. The infrared-compatible electronic device according to claim 2, characterized in that, The optical distance circuit also includes a first anti-static diode, a second anti-static diode, and a third anti-static diode; one end of the first anti-static diode is connected to the SCL pin of the optical distance sensor, one end of the second anti-static diode is connected to the SDA pin of the optical distance sensor, and one end of the third anti-static diode is connected to the INTN pin of the optical distance sensor; the other end of the first anti-static diode is connected to the other end of the second anti-static diode, the other end of the third anti-static diode, and ground.

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