Compact optical communication circuit

Abstract

The utility model belongs to the technical field of communication circuits, and particularly relates to a compact optical communication circuit. The receiving element is connected with the light-emitting element in parallel and is arranged in a direction opposite to that of the light-emitting element; the first control loop and the second control loop are connected to the two ends of the light-emitting element and the receiving element respectively; the two control loops are connected to the two ends of the light-emitting element and the receiving element respectively, so that only one loop is arranged, the number of product components and the number of loops are effectively reduced, and the size of a circuit board is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication circuits, in particular to a compact optical communication circuit. Background Art

[0002] An optical communication circuit consists of at least a light source and a light receiver. The light source can serve as an indicator or send optical signals to other light receivers, while the light receiver receives the optical signals emitted by the other light source. In existing optical communication circuits, the light source and light receiver are powered by independent circuits, resulting in a complex overall circuit and numerous components, which affects product costs. Summary of the Invention

[0003] The purpose of the utility model is to provide a compact optical communication circuit which effectively reduces the number of components.

[0004] The purpose of this utility model is achieved in this way:

[0005] A compact optical communication circuit, comprising:

[0006] Light-emitting element;

[0007] a receiving element connected in parallel with the light-emitting element and arranged in an opposite direction relative to the light-emitting element; and

[0008] A first control loop and a second control loop, which are connected to both ends of the light emitting element and the receiving element respectively;

[0009] The first control loop is used to control the start and stop of the light emitting element, and includes:

[0010] a first control transistor, wherein the collector of the first control transistor is connected to the anode of the light-emitting element, and the emitter of the first control transistor is grounded; the collector and base of the first control transistor are respectively connected to a first start input terminal and a first cutoff input terminal;

[0011] The second control loop is used to conduct the signal loop of the receiving element, and includes:

[0012] a second control transistor, wherein the collector of the second control transistor is connected to the positive electrode of the receiving element, and the emitter of the second control transistor is grounded; the collector of the second control transistor is further connected to the signal output terminal and the signal power supply, and the base of the second control transistor is connected to the second cutoff input terminal;

[0013] The light emitting element is started by turning the first control transistor into the off state and the second control transistor into the on state, or the signal circuit of the receiving element is turned on by turning the first control transistor into the on state and the second control transistor into the off state.

[0014] Furthermore, it also includes a signal output circuit, which includes a third control transistor, the emitter of the third control transistor is connected to the positive electrode of the light-emitting element, the collector thereof is connected to the power supply, and the base thereof is connected to the enhancement input terminal, which is used to power the third control transistor through the power supply by energizing the first enhancement input terminal.

[0015] Furthermore, the signal output circuit also includes a fourth control transistor, the light-emitting element includes a first signal lamp connected in parallel with the receiving element, and a second signal lamp connected to the emitter of the fourth control transistor, the collector of the fourth control transistor is connected to a power supply, and the enhanced input end is respectively connected to the base of the third control transistor and the base of the fourth control transistor.

[0016] Furthermore, the first signal light and the second signal light are red and green lights respectively.

[0017] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0018] Since the two control loops in this patent are respectively connected to the two ends of the light-emitting element and the receiving element, this patent only has one loop, which effectively saves the number of product components and the number of loops, thereby reducing the volume of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of Example 1.

[0020] Figure 2 This is a schematic diagram of Example 2.

[0021] The meaning of the numbers in the figure:

[0022] 1. First signal light; 2. Second signal light; 3. Receiving element; 4. First control transistor; 41. First start input; 42. First cutoff input; 5. Second control transistor; 51. Signal output; 52. Second cutoff input; 53. Signal power supply; 6. Third control transistor; 7. Fourth control transistor; 8. Enhance input DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with specific embodiments:

[0024] Example 1:

[0025] A compact optical communication circuit includes a light emitting element, a receiving element 3, a first control loop and a second control loop. The receiving element 3 is connected in parallel with the light emitting element and is arranged in the opposite direction to the light emitting element.

[0026] The optical communication circuit in this patent is used in an electric tool. The electric tool needs a light-emitting element to indicate whether the electric tool is operating normally, and also needs a receiving element 3 to receive external light signals to control the electric tool or modify the internal program of the electric tool. Figure 1 As shown, the light emitting element and the receiving element 3 are arranged in parallel, and the receiving element 3 is arranged in reverse relative to the light emitting element, that is, the positive electrode of the light emitting element is connected to the negative electrode of the receiving element 3, and the negative electrode of the light emitting element is connected to the positive electrode of the receiving element 3.

[0027] The first control loop and the second control loop are connected to the two ends of the light emitting element and the receiving element 3 respectively. Figure 1 As shown, the first control circuit is used to control the start and stop of the light-emitting element, which includes a first control transistor 4, the collector of the first control transistor 4 is connected to the positive electrode of the light-emitting element, and the emitter of the first control transistor 4 is grounded; the collector and base of the first control transistor 4 are respectively connected to the first start input terminal 41 and the first cut-off input terminal 42; the second control circuit is used to turn on the signal circuit of the receiving element 3, which includes a second control transistor 5, the collector of the second control transistor 5 is connected to the positive electrode of the receiving element 3, and the emitter of the second control transistor 5 is grounded; the collector of the second control transistor 5 is also connected to the signal output terminal 51 and the signal power supply 53, and the base of the second control transistor 5 is connected to the second cut-off input terminal 52.

[0028] Specifically, a power tool is typically equipped with a chip. The first start input 41, the first cutoff input 42, the signal output 51, and the second cutoff input 52 are connected to pins on the chip. When the chip controls the power tool, it simultaneously inputs signals to the first start input 41, the first cutoff input 42, and the second cutoff input 52 to control the light-emitting element and the receiving element 3. Normally, the power tool has a stopped state and an started state. In the stopped state, the receiving element 3 is required to operate, while in the started state, the light-emitting element is required to indicate the power tool's usage status. Therefore, the chip controls the first cutoff input 42 and the second cutoff input 52 to operate alternately to turn on the light-emitting element or to connect the signal circuit of the receiving element 3.

[0029] Specifically, the first control transistor 4 is an N-shaped transistor. When the light-emitting element is operating, a signal is input to the first start input terminal 41, no signal is input to the first cutoff input terminal 42, and a signal is input to the second cutoff input terminal 52. At this time, the base of the first control transistor 4 is at a low level, and the collector is at a high level, so the first control transistor 4 is in the cutoff state. The base of the second control transistor 5 is at a high level, and the collector is at a low level. At this time, the second control transistor 5 is in the on state. The first start input terminal 41 is at a high level under the control of the chip, which can directly power the light-emitting element until the emitter of the second control transistor 5 is connected. The light-emitting element is specifically the first signal light 1, which lights up to indicate the operating status of the power tool. However, because the wiring direction of the receiving element 3 is opposite to that of the light-emitting element, the receiving element 3 will not operate.

[0030] Similarly, the second control transistor 5 is an N-type transistor. When the receiving element 3 is required to operate, the first enable input terminal 41 has no input signal, the first disable input terminal 42 has a signal input, and the second disable input terminal 52 has no signal input. At this time, the base of the first control transistor 4 is at a high level, and the collector is at a low level, so the first control transistor 4 is in the on state. Meanwhile, the base of the second control diode is at a low level, and the collector is at a high level. The signal circuit of the receiving element 3 is conductive, i.e., it starts from the signal power supply 53, passes through the receiving element 3, reaches the first control transistor 4, and then reaches ground.

[0031] The receiving element 3 is specifically a phototransistor, which will be turned on after receiving light and will be turned off when it does not receive external light. When the receiving element 3 receives light, the entire signal circuit is turned on, and the signal output end 51 is short-circuited. When the receiving element 3 does not receive light, the entire signal circuit is turned on and disconnected due to the receiving element 3. At this time, the signal output end 51 will receive the signal from the signal power supply 53 to realize the reception of the optical signal.

[0032] Overall, since the two control loops in this patent are respectively connected to the two ends of the light-emitting element and the receiving element 3, this patent only has one loop, which effectively saves the number of product components and the number of loops, thereby reducing the volume of the circuit board.

[0033] Example 2:

[0034] This embodiment, based on Example 1, further includes a signal output circuit comprising a third control transistor 6. The emitter of the third control transistor 6 is connected to the anode of the light-emitting element, the collector is connected to the power supply, and the base is connected to the boost input terminal 8. The third control transistor 6 is configured to receive power from the power supply by energizing the first boost input terminal 8. The signal output circuit is configured to increase the power supplied to the light-emitting element, thereby varying or controlling its brightness and outputting an optical signal.

[0035] like Figure 2 As shown, in this embodiment, the light-emitting element includes a first signal light 1 and a second signal light 2. The first signal light 1 is connected in parallel with the receiving element 3. The first signal light 1 and the second signal light 2 are red and green, respectively, and are used to indicate various states of the power tool or to output light signals. The first signal light 1 and the second signal light 2 are respectively connected to a third control transistor 6 and a fourth control transistor 7 for controlling their operation. The emitter of the third control transistor 6 is connected to the anode of the light-emitting element, the collector is connected to a power supply, and the base is connected to a boost input terminal 8. The emitter of the fourth control transistor 7 is connected to the anode of the second signal light 2, the collector is connected to a power supply, and the boost input terminal 8 is also connected to the base of the fourth control transistor 7. The cathode of the second signal light 2 is connected to the cathode of the first signal light 1 and is connected to the second control loop.

[0036] The third and fourth control transistors 6 and 7 are P-type transistors. Under normal conditions, the boost input 8 is at a high level, turning the P-type transistors off. During operation, the boost input 8 is at a low level, turning on the third and fourth control transistors 6 and 7. This allows the power source to directly supply the first and second signal lights 1 and 2, thereby increasing the power of the first and second signal lights 1 and 2, thereby achieving the effect of outputting a light signal. In practice, the second signal light 2 is also connected to an independent control signal that controls its operation when the boost input 8 is not in use. When the boost input 8 is in operation, the independent control signal connected to the second signal light 2 and the first start input 41 are left floating to prevent them from affecting the normal operation of the boost input 8.

[0037] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compact optical communication circuit, characterized in that: include: Light-emitting element; a receiving element (3), connected in parallel with the light-emitting element and arranged in the opposite direction to the light-emitting element; as well as A first control loop and a second control loop, which are connected to both ends of the light emitting element and the receiving element (3) respectively; The first control loop is used to control the start and stop of the light emitting element, and includes: A first control transistor (4), the collector of the first control transistor (4) being connected to the positive electrode of the light-emitting element, and the emitter of the first control transistor (4) being grounded; the collector and base of the first control transistor (4) being respectively connected to a first start input terminal (41) and a first cutoff input terminal (42); The second control circuit is used to conduct the signal circuit of the receiving element (3), and includes: a second control transistor (5), wherein the collector of the second control transistor (5) is connected to the positive electrode of the receiving element (3), and the emitter of the second control transistor (5) is grounded; the collector of the second control transistor (5) is also connected to a signal output terminal (51) and a signal power supply (53), and the base of the second control transistor (5) is connected to a second cutoff input terminal (52); The light emitting element is started by making the first control transistor (4) enter the cut-off state and the second control transistor (5) enter the on-state, or the signal circuit of the receiving element (3) is turned on by making the first control transistor (4) enter the on-state and the second control transistor (5) enter the cut-off state.

2. The compact optical communication circuit according to claim 1, wherein: The invention also includes a signal output circuit, which includes a third control transistor (6), the emitter of the third control transistor (6) is connected to the positive electrode of the light-emitting element, the collector is connected to the power supply, and the base is connected to the enhanced input terminal (8), and is used to enable the third control transistor (6) to be powered by the power supply by energizing the first enhanced input terminal (8).

3. The compact optical communication circuit according to claim 2, wherein: The signal output circuit further includes a fourth control transistor (7), the light-emitting element includes a first signal lamp (1) connected in parallel with the receiving element (3), and a second signal lamp (2) connected to the emitter of the fourth control transistor (7), the collector of the fourth control transistor (7) is connected to a power supply, and the enhanced input terminal (8) is respectively connected to the base of the third control transistor (6) and the base of the fourth control transistor (7).

4. The compact optical communication circuit according to claim 3, wherein: The first signal light (1) and the second signal light (2) are a red light and a green light respectively.

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