Level conversion circuit and mouse

Abstract

The utility model discloses a level conversion circuit and a mouse, relates to level conversion technical field, the mouse includes photoelectric sensor and master control module, photoelectric sensor has first signal transmission terminal, master control module has second signal transmission terminal, level conversion circuit includes switch tube circuit and one-way conduction circuit, the one-way conduction circuit is connected to the switch tube circuit, the one-way conduction circuit is connected to the one-way conduction circuit. The input end of the switching tube circuit is electrically connected with the second signal transmission end, the output end of the switching tube circuit is electrically connected with the first signal transmission end, a first voltage is connected to the controlled end of the switching tube circuit, the input end of the one-way conduction circuit is electrically connected with the first signal transmission end, and the output end of the one-way conduction circuit is electrically connected with the second signal transmission end; the utility model aims to realize level conversion between the photoelectric sensor and the main control module by adopting a plurality of simple discrete components, so that the cost of the applied mouse is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of level conversion, in particular to a level conversion circuit and a mouse. Background Art

[0002] A mouse typically consists of a photoelectric sensor and an MCU. The photoelectric sensor's primary function is to track mouse movement and convert it into electrical signals. When the user moves the mouse, the photoelectric sensor quickly captures the mouse's motion and converts it into electrical signals that can be recognized by the computer. These electrical signals are then transmitted to the MCU, which decodes and processes them according to a pre-set program. The MCU then packages the processed data into a specific format and transmits it to the computer via the mouse's interface (such as USB or Bluetooth). The computer then uses this data to update information such as the cursor position on the screen.

[0003] However, since the operating voltage of the photoelectric sensor is generally lower than that of the MCU, the photoelectric sensor cannot be directly connected to the MCU. Direct connection may cause signal mismatch or even damage the device. The common solution on the market is to set up a level conversion module. The level conversion module can convert the low-level signal output by the photoelectric sensor into a high-level signal that the MCU can recognize and process, or convert the high-level control signal output by the MCU into a low-level signal that the photoelectric sensor can accept. However, since the level conversion module is a highly integrated component, its cost is usually high and it is not suitable for use in low-priced mice. Utility Model Content

[0004] The main purpose of the utility model is to provide a level conversion circuit and a mouse, aiming to use a plurality of simple discrete components to realize the level conversion between the photoelectric sensor and the main control module, so as to reduce the cost of the applied mouse.

[0005] To achieve the above-mentioned object, the level conversion circuit proposed in the present invention is applied to a mouse, wherein the mouse includes a photoelectric sensor and a main control module, wherein the photoelectric sensor has a first signal transmission terminal, and the main control module has a second signal transmission terminal, wherein the first signal transmission terminal is connected to a first voltage, and the second signal transmission terminal is connected to a second voltage; the level conversion circuit includes:

[0006] a switching tube circuit, wherein an output terminal of the switching tube circuit is electrically connected to the second signal transmission terminal, an input terminal of the switching tube circuit is electrically connected to the first signal transmission terminal, and a controlled terminal of the switching tube circuit is connected to a first voltage;

[0007] A unidirectional conducting circuit, wherein the output end of the unidirectional conducting circuit is electrically connected to the first signal transmission end, and the input end of the unidirectional conducting circuit is electrically connected to the second signal transmission end; wherein the first voltage is less than the second voltage.

[0008] In one embodiment, the switch circuit includes:

[0009] A first switching tube, wherein the output end of the first switching tube is electrically connected to the second signal transmission end, the input end of the first switching tube is electrically connected to the first signal transmission end, and the controlled end of the first switching tube is connected to a first voltage.

[0010] In one embodiment, the first switch tube is an NPN transistor.

[0011] In one embodiment, the switch tube circuit further includes:

[0012] An acceleration capacitor circuit includes a first resistor and a first capacitor, wherein the first end of the first resistor and the first end of the first capacitor are both electrically connected to the controlled end of the first switching tube, and the second end of the first resistor and the second end of the first capacitor are both connected to a first voltage.

[0013] In one embodiment, the unidirectional conducting circuit includes:

[0014] A first diode, wherein an anode of the first diode is electrically connected to the first signal transmission end, and a cathode of the first diode is electrically connected to the second signal transmission end.

[0015] The utility model also provides a mouse, which includes a photoelectric sensor, a main control module and the above-mentioned level conversion circuit.

[0016] In one embodiment, the mouse also includes multiple unidirectional conduction circuits, the photoelectric sensor has multiple signal receiving ends, the multiple signal receiving ends are all connected to the first voltage, the multiple signal receiving ends are also electrically connected one by one to the multiple unidirectional conduction circuit output ends, and the multiple unidirectional conduction circuit input ends are all electrically connected to the main control module.

[0017] In one embodiment, the mouse further comprises:

[0018] An LED lamp and a filter circuit, wherein the input end of the filter circuit is connected to a first voltage, the output end of the filter circuit is connected to one end of the LED lamp, and the other end of the LED lamp is electrically connected to the photoelectric sensor.

[0019] In one embodiment, the LED lamp is an infrared light emitting diode.

[0020] The technical solution of the present utility model includes a switching tube circuit and a unidirectional conduction circuit. The photoelectric sensor has a first signal transmission end, and the main control module has a second signal transmission end. The first signal transmission end is connected to a first voltage, and the second signal transmission end is connected to a second voltage. The first voltage is the working voltage of the photoelectric sensor, and the second voltage is the working voltage of the main control module. Since the voltage of the input end of the unidirectional conduction circuit is greater than the voltage of the output end, and the voltage of the controlled end and the voltage of the input end of the switching tube circuit are equal, the switching tube circuit is disconnected and the unidirectional conduction circuit is cut off, thereby avoiding the phenomenon that the photoelectric sensor is connected to the second voltage, causing communication abnormalities or even damage. When the main control module needs to transmit data to the photoelectric sensor, the main control module pulls down the voltage of the second signal transmission end to 0. Since the voltage of the first signal transmission end is greater than 0 at this time, the unidirectional circuit is turned on, and the voltage of the first signal transmission end is pulled down to nearly 0 by the second signal transmission end. The main control circuit outputs the corresponding signal to the photoelectric sensor through the unidirectional conduction circuit; when the photoelectric sensor needs to transmit a signal to the main control module, the photoelectric sensor pulls down the voltage of the first signal transmission end to 0, so that the voltage of the input end of the switch tube circuit is pulled down to nearly 0, and the switch tube circuit is turned on. Since the switch tube circuit is in an amplified state rather than a saturated state at this time, the photoelectric sensor can transmit the corresponding signal to the main control through the switch tube circuit. The circuit is configured in this way. When the main control module and the photoelectric sensor do not need to transmit signals to each other, the unidirectional conduction function of the unidirectional conduction circuit and the disconnection state of the switch tube circuit can effectively prevent the photoelectric sensor and the main control module from being directly connected, thereby avoiding abnormal communication between the two. When data needs to be transmitted, it is only necessary to pull down the voltage of the corresponding signal transmission end to 0, and the voltage of the other signal transmission end is also pulled down to close to 0. That is, the corresponding signal can be output through the unidirectional conduction circuit or the switch tube circuit through level conversion. Compared with the existing mouse that uses a level conversion circuit, the present invention can be implemented by using at least one diode and at least one switch tube, which can effectively reduce the cost of the mouse used by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a module diagram of an embodiment of a level conversion circuit and a mouse provided by the present utility model;

[0023] Figure 2 This is a circuit structure diagram of an embodiment of a level conversion circuit and a mouse provided by the present invention.

[0024] Description of Figure Numbers:

[0025] 10. Photoelectric sensor; 20. Main control module; 30. One-way conduction circuit; 40. Switching tube circuit.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] A mouse typically consists of a photoelectric sensor and an MCU. The photoelectric sensor's primary function is to track mouse movement and convert it into electrical signals. When the user moves the mouse, the photoelectric sensor quickly captures the mouse's motion and converts it into electrical signals that can be recognized by the computer. These electrical signals are then transmitted to the MCU, which decodes and processes them according to a pre-set program. The MCU then packages the processed data into a specific format and transmits it to the computer via the mouse's interface (such as USB or Bluetooth). The computer then uses this data to update information such as the cursor position on the screen.

[0031] However, since the operating voltage of the photoelectric sensor is generally lower than that of the MCU, the photoelectric sensor cannot be directly connected to the MCU. Direct connection may cause signal mismatch or even damage the device. The common solution on the market is to set up a level conversion module. The level conversion module can convert the low-level signal output by the photoelectric sensor into a high-level signal that the MCU can recognize and process, or convert the high-level control signal output by the MCU into a low-level signal that the photoelectric sensor can accept. However, since the level conversion module is a highly integrated component, its cost is usually high and it is not suitable for use in low-priced mice.

[0032] To this end, the present invention proposes a level conversion circuit and a mouse, which aim to use multiple discrete components to achieve level conversion between a photoelectric sensor and a main control module, so as to reduce the cost of the applied mouse.

[0033] refer to Figure 1 In one embodiment of the present invention, a level conversion circuit is applied to a mouse, wherein the mouse includes a photoelectric sensor 10 and a main control module 20, wherein the photoelectric sensor 10 has a first signal transmission terminal AO1, and the main control module 20 has a second signal transmission terminal AO2, wherein the first signal transmission terminal is connected to a first voltage, and the second signal transmission terminal is connected to a second voltage;

[0034] The level conversion circuit includes:

[0035] a switch tube circuit 40, wherein the output end of the switch tube circuit 40 is electrically connected to the second signal transmission end, the input end of the switch tube circuit 40 is electrically connected to the first signal transmission end, and the controlled end of the switch tube circuit 40 is connected to the first voltage;

[0036] A unidirectional conducting circuit 30, wherein the output end of the unidirectional conducting circuit 30 is electrically connected to the first signal transmission end, and the input end of the unidirectional conducting circuit 30 is electrically connected to the second signal transmission end; wherein the first voltage is less than the second voltage.

[0037] In this embodiment, the unidirectional conducting circuit 30 may be a field effect transistor, a Schottky barrier diode or a unidirectional thyristor.

[0038] In this embodiment, the first signal transmission end is connected to the first voltage via a resistor, and the second signal transmission end is connected to the second voltage via a resistor.

[0039] In this embodiment, the main control module 20 can be implemented by a main controller, such as an MCU (Microcontroller Unit), a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), a SOC (System On Chip), etc.

[0040] In this embodiment, the switch circuit 40 may be a transistor, a MOS transistor or an IGBT transistor.

[0041] In this embodiment, specifically, the technical solution of the present invention includes a switching tube circuit 40 and a unidirectional conduction circuit 30, the photoelectric sensor 10 has a first signal transmission end, the main control module 20 has a second signal transmission end, the first signal transmission end is connected to a first voltage, and the second signal transmission end is connected to a second voltage, wherein the first voltage is the working voltage of the photoelectric sensor 10, and the second voltage is the working voltage of the main control module 20. Since the voltage at the input end of the unidirectional conduction circuit 30 is greater than the voltage at the output end, and the voltage at the controlled end and the voltage at the input end of the switching tube circuit 40 are equal, the switching tube circuit 40 is disconnected and the unidirectional conduction circuit 30 is cut off, thereby avoiding the phenomenon that the photoelectric sensor 10 is connected to the second voltage, causing communication abnormalities or even damage. When the main control module 20 needs to transmit data to the photoelectric sensor 10, the main control module 20 pulls down the voltage of the second signal transmission end to 0. Since the voltage of the first signal transmission end is greater than 0 at this time, the unidirectional circuit is turned on, and the voltage of the first signal transmission end is pulled down to nearly 0 by the second signal transmission end. The main control circuit outputs the corresponding signal to the photoelectric sensor 10 through the unidirectional conduction circuit 30; when the photoelectric sensor 10 needs to transmit a signal to the main control module 20, the photoelectric sensor 10 pulls down the voltage of the first signal transmission end to 0, so that the voltage of the input end of the switch tube circuit 40 is pulled down to nearly 0, and the switch tube circuit 40 is turned on. Since the switch tube circuit 40 is in an amplified state rather than a saturated state at this time, the photoelectric sensor 10 can transmit the corresponding The signal is transmitted to the main control circuit. With such a configuration, when the main control module 20 and the photoelectric sensor 10 do not need to transmit signals to each other, the unidirectional conduction function of the unidirectional conduction circuit 30 and the disconnection state of the switch tube circuit 40 can effectively prevent the photoelectric sensor 10 and the main control module 20 from being directly connected, thereby avoiding abnormal communication between the two. When data needs to be transmitted, it is only necessary to lower the voltage of the corresponding signal transmission end to 0, and the voltage of the other signal transmission end will also be pulled down to close to 0, that is, the corresponding signal can be output through the unidirectional conduction circuit 30 or the switch tube circuit 40 through level conversion. Compared with the existing mouse using a level conversion circuit, the present invention can be implemented using at least one diode and at least one switch tube, which can effectively reduce the cost of the mouse used by the present invention.

[0042] refer to Figure 2 In one embodiment of the present invention, the switch tube circuit 40 includes:

[0043] The first switch tube Q1 has an output terminal electrically connected to the second signal transmission terminal, an input terminal electrically connected to the first signal transmission terminal, and a controlled terminal of the first switch tube Q1 connected to a first voltage.

[0044] In this embodiment, the first switch tube Q1 can be a transistor, a MOS tube or an IGBT tube.

[0045] In this embodiment, the first switch Q1 is an NPN transistor. When the photoelectric sensor 10 does not need to transmit a signal to the main control module 20, the voltage at the emitter of the first switch Q1 is equal to the voltage at the base, and therefore the first switch Q1 is in the off state. This prevents the photoelectric sensor 10 from being connected to the second voltage, which may cause communication anomalies or even damage. When the photoelectric sensor 10 needs to transmit a signal to the main control module 20, the photoelectric sensor 10 pulls down the voltage at the first signal transmission terminal to 0. Since the emitter voltage of the first switch Q1 is also pulled down at this time, that is, the emitter voltage is less than the base voltage, the first switch Q1 is turned on. After being turned on, the voltage at the second signal transmission terminal is also pulled down to nearly 0. The photoelectric sensor 10 can output a corresponding signal to the second signal transmission terminal via the first signal transmission terminal and the first switch Q1. With this arrangement, compared with the existing mouse that uses a level conversion circuit, the present invention can be implemented using at least one diode and at least one switch, which can effectively reduce the cost of the mouse used by the present invention.

[0046] refer to Figure 2 In one embodiment of the present invention, the switch tube circuit 40 further includes:

[0047] An accelerating capacitor circuit includes a first resistor R1 and a first capacitor C1, wherein the first end of the first resistor R1 and the first end of the first capacitor C1 are both electrically connected to the controlled end of the first switching tube Q1, and the second end of the first resistor R1 and the second end of the first capacitor C1 are both connected to a first voltage.

[0048] In this embodiment, the first switch Q1 is an NPN transistor, and the accelerating capacitor circuit is used to accelerate the on / off response of the first switch Q1. When the control pulse input to the controlled terminal of the first switch Q1 is at a low level, the circuit reaches a steady state, the first switch Q1 is in the off state, and the voltage across the first capacitor C1 is zero. When the control pulse becomes high, the capacitor voltage cannot change suddenly, so the capacitor needs to maintain a zero voltage state. This causes the voltage at the controlled terminal of the first switch Q1 to suddenly rise to a high level, thereby quickly turning on the first switch Q1.

[0049] When the control pulse returns to a low level, the capacitor voltage cannot change suddenly, so the first capacitor C1 needs to continue to maintain the pulse level voltage, causing the voltage at the controlled terminal of the first switch tube Q1 to jump from zero to a negative pulse level voltage. This quickly switches the controlled terminal of the first switch tube Q1 from a saturated state to a cut-off state, and thus quickly turns on the first switch tube Q1. This configuration accelerates the transition of the first switch tube Q1 from the on state to the off state.

[0050] refer to Figure 2 In one embodiment of the present invention, the unidirectional conducting circuit 30 includes:

[0051] A first diode D1 , wherein an anode of the first diode D1 is electrically connected to the first signal transmission end, and a cathode of the first diode D1 is electrically connected to the second signal transmission end.

[0052] In this embodiment, when the main control module 20 does not need to transmit a signal to the photoelectric sensor 10, the cathode voltage of the first diode D1 is greater than the anode voltage, so the first diode D1 is cut off, thereby preventing the photoelectric sensor 10 from being connected to the second voltage, causing communication abnormalities or even damage; when the main control module 20 wants to send an output to the photoelectric sensor 10, the main control module 20 pulls down the voltage of the second signal transmission end to 0. Since the voltage value of the first signal transmission end is greater than the first voltage, the first diode D1 is turned on, and the voltage of the first signal transmission end is also pulled down to close to 0 by the second signal transmission end. At this time, the main control circuit can output a corresponding signal to the photoelectric sensor 10. With this arrangement, compared with the existing mouse that uses a level conversion circuit, the present invention can be implemented using at least one diode and at least one switch tube, which can effectively reduce the cost of the mouse used by the present invention.

[0053] The present invention further provides a mouse, comprising a photoelectric sensor 10 , a main control module 20 and the level conversion circuit as described above.

[0054] It is worth noting that since the mouse of the present invention is based on the above-mentioned level conversion circuit, the embodiments of the mouse of the present invention include all technical solutions of all embodiments of the above-mentioned level conversion circuit, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0055] refer to Figure 2 In one embodiment of the present invention, the mouse also includes multiple unidirectional conduction circuits 30, the photoelectric sensor 10 has multiple signal receiving ends, and the multiple signal receiving ends are all connected to the first voltage. The multiple signal receiving ends are also electrically connected one by one to the output ends of the multiple unidirectional conduction circuits 30, and the input ends of the multiple unidirectional conduction circuits 30 are all electrically connected to the main control module 20.

[0056] In this embodiment, the photoelectric sensor 10 has multiple signal receiving ends, such as a clock end. The clock end is used to receive the clock signal input by the main control module 20 to ensure that the data transmission between the main control module 20 and the photoelectric sensor 10 is synchronized. When the photoelectric sensor 10 needs to receive the clock signal input by the main control module 20, the photoelectric sensor 10 pulls down the voltage of the clock end to 0, and the voltage of the corresponding port of the main control module 20 is also pulled down to close to 0. The unidirectional conduction circuit 30 is turned on so that the main control module 20 outputs the clock signal to the clock end of the photoelectric sensor 10. When the photoelectric sensor 10 does not need to receive the clock signal, the unidirectional conduction circuit 30 can effectively prevent the current of the second voltage from flowing back into the photoelectric sensor 10, causing damage to the photoelectric sensor 10.

[0057] refer to Figure 2 In one embodiment of the present invention, the mouse further comprises:

[0058] The LED lamp D2 and the filter circuit, the input end of the filter circuit is connected to the first voltage, the output end of the filter circuit is connected to one end of the LED lamp D2, and the other end of the LED lamp D2 is electrically connected to the photoelectric sensor 10.

[0059] In this embodiment, the LED lamp D2 is an infrared light-emitting diode. The main function of the infrared light-emitting diode (IRLED) in the mouse is to serve as a light source to illuminate the working surface of the mouse. By emitting infrared rays, the IR light-emitting diode can help the photoelectric sensor 10 of the mouse accurately read the trajectory of the mouse movement. The LED lamp D2 is connected to the first voltage through a filtering circuit. The filtering circuit is composed of at least one resistor and a capacitor. The filtering circuit can ensure that the voltage across the LED lamp D2 remains stable, preventing the LED lamp D2 from flickering or performance degradation due to voltage fluctuations.

[0060] refer to Figure 2 In one embodiment of the present invention, the photoelectric sensor 10 further includes a first power supply terminal VCC and a second power supply terminal VCCREG. The first power supply terminal is connected to the first voltage via multiple capacitors, and the second power supply terminal is grounded via multiple capacitors. The filtering effect of the capacitor can make the photoelectric sensor 10 work more stably.

[0061] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A level conversion circuit, applied to a mouse, the mouse comprising a photoelectric sensor and a main control module, the photoelectric sensor having a first signal transmission end, the main control module having a second signal transmission end, characterized in that: The first signal transmission end is connected to a first voltage, and the second signal transmission end is connected to a second voltage; The level conversion circuit includes: a switching tube circuit, wherein an output terminal of the switching tube circuit is electrically connected to the second signal transmission terminal, an input terminal of the switching tube circuit is electrically connected to the first signal transmission terminal, and a controlled terminal of the switching tube circuit is connected to a first voltage; A unidirectional conducting circuit, wherein the output end of the unidirectional conducting circuit is electrically connected to the first signal transmission end, and the input end of the unidirectional conducting circuit is electrically connected to the second signal transmission end; wherein the first voltage is less than the second voltage.

2. The level conversion circuit according to claim 1, wherein: The switch tube circuit includes: A first switching tube, wherein the output end of the first switching tube is electrically connected to the second signal transmission end, the input end of the first switching tube is electrically connected to the first signal transmission end, and the controlled end of the first switching tube is connected to a first voltage.

3. The level conversion circuit according to claim 2, wherein: The first switching tube is an NPN transistor.

4. The level conversion circuit according to claim 2, wherein: The switch tube circuit further includes: An acceleration capacitor circuit includes a first resistor and a first capacitor, wherein the first end of the first resistor and the first end of the first capacitor are both electrically connected to the controlled end of the first switching tube, and the second end of the first resistor and the second end of the first capacitor are both connected to a first voltage.

5. The level conversion circuit according to claim 1, wherein: The unidirectional conducting circuit comprises: A first diode, wherein an anode of the first diode is electrically connected to the first signal transmission end, and a cathode of the first diode is electrically connected to the second signal transmission end.

6. A mouse, characterized in that: The device comprises a photoelectric sensor, a main control module and the level conversion circuit according to any one of claims 1 to 5.

7. The mouse according to claim 6, wherein: The mouse also includes multiple unidirectional conduction circuits, the photoelectric sensor has multiple signal receiving ends, the multiple signal receiving ends are all connected to the first voltage, the multiple signal receiving ends are also electrically connected one by one to the multiple unidirectional conduction circuit output ends, and the multiple unidirectional conduction circuit input ends are all electrically connected to the main control module.

8. The mouse according to claim 6, wherein: The mouse further comprises: An LED lamp and a filter circuit, wherein the input end of the filter circuit is connected to a first voltage, the output end of the filter circuit is connected to one end of the LED lamp, and the other end of the LED lamp is electrically connected to the photoelectric sensor.

9. The mouse according to claim 8, wherein: The LED lamp is an infrared light emitting diode.

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