Laser control circuit of holographic sighting telescope and holographic sighting telescope

Abstract

The utility model provides a laser control circuit of a holographic sighting telescope and the holographic sighting telescope, and relates to the technical field of sighting telescopes. The circuit comprises a complementary switch unit, a single-chip microcomputer chip, a laser tube driving unit, a first button unit and a second button unit. Wherein the complementary switch unit, the laser tube driving unit, the first key unit and the second key unit are electrically connected with the single chip microcomputer chip, the first key unit is further electrically connected with the complementary switch unit, the input end of the complementary switch unit is used for being connected with direct current, and the output end of the complementary switch unit is used for being electrically connected with a laser tube. And the laser tube driving unit is also electrically connected with the complementary switch unit and is used for being electrically connected with the laser tube. According to the circuit, the cruising ability and the energy management efficiency of the holographic sighting telescope can be improved.

Description

Technical Field

[0001] This application relates to the technical field of aiming sights, and more particularly, to a laser control circuit and a holographic aiming sight for a holographic aiming sight. Background Art

[0002] A holographic aiming sight, as an advanced aiming device, can superimpose a virtual reticle image (such as a crosshair, aiming point, etc.) on the field of view through an internal optical system and electronic display technology, enabling the shooter to quickly and accurately aim at the target. To ensure the long-term use of the holographic aiming sight, a single-chip microcomputer is commonly used for energy-saving control in the current market. Through the intelligent management of the single-chip microcomputer, the holographic aiming sight can automatically enter the standby state when not in use, thereby effectively reducing power consumption and extending the battery life. This solution alleviates the problem of energy consumption to a certain extent, making the holographic aiming sight more reliable in the wild or long-term combat environments.

[0003] However, although the single-chip microcomputer energy-saving control solution improves the battery life of the holographic aiming sight to a certain extent, some circuits still maintain a certain power consumption in the standby state. Although these power consumptions are lower than those in the working state, the long-term accumulation will still have an adverse impact on the long-term use or energy management of the holographic aiming sight. Summary of the Utility Model

[0004] To solve the above problems, this application provides a laser control circuit and a holographic aiming sight for a holographic aiming sight, which can improve its battery life and energy management efficiency.

[0005] This application is implemented as follows:

[0006] In a first aspect, the present application provides a laser control circuit for a holographic sight, which includes a complementary switch unit, a microcontroller chip, a laser tube driving unit, a first button unit, and a second button unit. Among them, the complementary switch unit, the laser tube driving unit, the first button unit, and the second button unit are all electrically connected to the microcontroller chip respectively. The first button unit is also electrically connected to the complementary switch unit. The input end of the complementary switch unit is used to access direct current, and the output end of the complementary switch unit is used to be electrically connected to the laser tube. The laser tube driving unit is also electrically connected to the complementary switch unit and is used to be electrically connected to the laser tube. Among them, the first button unit is used to receive button operations to control the conduction of the direct current accessed to the complementary switch unit, and when the direct current accessed to the complementary switch unit is conducting, after receiving a button operation, it sends a power-off voltage signal to the microcontroller chip; the second button unit is used to send a gear-shifting voltage signal to the microcontroller chip after receiving a button operation; the microcontroller chip is used to output a first signal to the complementary switch unit to control the complementary switch unit to maintain conduction in the powered state, and is also used to receive the power-off voltage signal to control the cut-off of the direct current accessed to the complementary switch unit, and receive the gear-shifting voltage signal to output PWM signals with different duty cycles; the laser tube driving unit is used to drive the laser tube to output laser according to the received PWM signal.

[0007] In some implementation manners, the circuit further includes an anti-reverse connection unit. One end of the anti-reverse connection unit is connected to the input end of the complementary switch unit, and the other end is used to access direct current.

[0008] In some implementation manners, the anti-reverse connection unit includes a wiring terminal J4, a wiring terminal J5, a capacitor C3, and a MOS transistor Q3. The gate of the MOS transistor Q3 is connected to the wiring terminal J5. The gate of the MOS transistor Q3 is also connected to the drain of the MOS transistor Q3 through the capacitor C3. The drain of the MOS transistor Q3 is connected to the wiring terminal J4, and the source of the MOS transistor Q3 is connected to the input end of the complementary switch unit.

[0009] In some implementations, the complementary switch unit includes a resistor R8, a resistor R14, a resistor R15, a diode D1, a P-type MOS transistor Q2, and an N-type MOS transistor M1. The source of the P-type MOS transistor Q2 is used to connect to direct current power. The source of the P-type MOS transistor Q2 is also connected to the drain of the N-type MOS transistor M1 through the resistor R8. The gate of the P-type MOS transistor Q2 is connected to the drain of the N-type MOS transistor M1. The gate of the P-type MOS transistor Q2 is also connected to the anode of the diode D1. The cathode of the diode D1 is connected to the first button unit and the single-chip microcomputer chip. The drain of the P-type MOS transistor Q2 is used to generate a DC voltage VCC_3.3V. The source of the N-type MOS transistor M1 is connected to the gate of the N-type MOS transistor M1 through the resistor R14. The source of the N-type MOS transistor M1 is also grounded. The gate of the N-type MOS transistor M1 is connected to the laser tube driving unit and the single-chip microcomputer chip through the resistor R15.

[0010] In some implementations, the complementary switch unit further includes a capacitor C4 and a capacitor C8; the drain of the P-type MOS transistor Q2 is grounded through the parallel-connected capacitor C4 and the capacitor C8.

[0011] In some implementations, the single-chip microcomputer chip is a chip U9 of the STM8L151G6U6 model. The pin PB0 of the chip U9 is connected to the cathode of the diode D1. The pin PD1 of the chip U9 is connected to the resistor R15. The pin VDD of the chip U9 is connected to the DC voltage VCC_3.3V. The pins PB1 and PB2 of the chip U9 are connected to the second button unit.

[0012] In some implementations, the first button unit includes a tactile switch SW10 and a resistor R34. One end of the tactile switch SW10 is grounded, and the other end is connected to the cathode of the diode D1. The cathode of the diode D1 is also connected to the DC voltage VCC_3.3V through the resistor R34.

[0013] In some implementations, the laser tube driving unit includes a triode Q1, a triode Q5, a resistor R2, and a resistor R1. The base of the triode Q1 is connected to the pin PD2 of the chip U9. The base of the triode Q1 is connected to the pin PD1 of the chip U9 through the resistor R2. The base of the triode Q1 is also connected to the collector of the triode Q5. The emitter of the triode Q1 is connected to the base of the triode Q5. The emitter of the triode Q1 is connected to the emitter of the triode Q5 through the resistor R1. The emitter of the triode Q5 is grounded. The collector of the triode Q1 is used for electrical connection with one end of the laser tube, and the other end of the laser tube is used for connection with the DC voltage VCC_3.3V.

[0014] In a second aspect, the present application provides a holographic sight, which includes the laser control circuit of any one of the holographic sights in the first aspect.

[0015] Compared with the prior art, the present application has at least the following advantages or beneficial effects:

[0016] The laser control circuit of the holographic sight is controlled to start / turn off through the first key unit. Pressing the first key unit for the first time starts the circuit, and the single-chip microcomputer chip makes the N-MOSFET in the complementary switch unit conduct, maintaining the circuit powered on; pressing the first key unit again, the single-chip microcomputer chip makes the N-MOSFET in the complementary switch unit cut off, and the circuit is powered off. Its operation is simple and efficient, and the power consumption during circuit operation is low, which can effectively improve the battery life and energy management efficiency of the holographic sight. Moreover, when the single-chip microcomputer chip is working, the second key unit can adjust the laser output. That is, by increasing or decreasing the gear button, the single-chip microcomputer chip outputs PWM signals with different duty cycles to the laser tube driving unit, thereby adjusting the laser output power and frequency to achieve fine control and further improving the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a structural block diagram of an embodiment of the laser control circuit of a holographic sight of the present application;

[0019] Figure 2 It is a structural block diagram of another embodiment of the laser control circuit of a holographic sight of the present application;

[0020] Figure 3Schematic diagram of the complementary switch unit, the first button unit, and the reverse connection prevention unit in an embodiment of the laser control circuit of a holographic sight in the present application;

[0021] Figure 4 Schematic diagram of the structure of the single-chip microcomputer chip in an embodiment of the laser control circuit of a holographic sight in the present application;

[0022] Figure 5 Schematic diagram of the circuit of the laser tube driving unit and the laser tube in an embodiment of the laser control circuit of a holographic sight in the present application.

[0023] Icons: 100, complementary switch unit; 200, single-chip microcomputer chip; 300, laser tube driving unit; 400, first button unit; 500, second button unit; 600, reverse connection prevention unit. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Generally, the components of the embodiments of the present application described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0026] Some implementation manners of the present application will be described in detail below with reference to the accompanying drawings. Without conflict, the following various embodiments and the various features in the embodiments can be combined with each other.

[0027] Embodiment:

[0028] In shooting sports, holographic sights have been widely used due to their advantages of high precision and fast aiming. However, with the continuous enhancement of their functions, the power consumption of holographic sights during long-term use has increased significantly, becoming an important factor restricting their use efficiency. Currently, single-chip microcontrollers are commonly used in the market for energy-saving control. Through intelligent management, the sight automatically enters the standby state when not in use, thus reducing power consumption to a certain extent and extending the battery life. However, after in-depth analysis, the inventor found that even in the standby state, some circuits inside the holographic sight still continue to work, resulting in a certain amount of power consumption. Although this standby power consumption is lower than that in the working state, when accumulated over a long time, it will still significantly affect the battery life and energy management efficiency of the sight, especially in the field or during long-term combat environments, this problem is particularly prominent.

[0029] Therefore, this application provides a laser control circuit for a holographic sight. By cleverly designing the circuit connection logic, it can control the opening and closing of the laser tube and adjust its brightness with low power consumption, thereby improving the battery life and energy management efficiency of the holographic sight.

[0030] Please refer to Figure 1 , the laser control circuit of a holographic sight includes a complementary switch unit 100, a single-chip microcontroller chip 200, a laser tube driving unit 300, a first button unit 400, and a second button unit 500. Among them, the complementary switch unit 100, the laser tube driving unit 300, the first button unit 400, and the second button unit 500 are all electrically connected to the single-chip microcontroller chip 200 respectively. The first button unit 400 is also electrically connected to the complementary switch unit 100. The input end of the complementary switch unit 100 is used to connect to direct current, and the output end of the complementary switch unit 100 is used to be electrically connected to the laser tube. The laser tube driving unit 300 is also electrically connected to the complementary switch unit 100 and is used to be electrically connected to the laser tube. Among them, the first button unit 400 is used to receive button operations to control the conduction of the direct current connected to the complementary switch unit 100, and when the direct current connected to the complementary switch unit 100 is conducting, it sends a power-off voltage signal to the single-chip microcontroller chip 200 after receiving a button operation; the second button unit 500 is used to send a gear-shifting voltage signal to the single-chip microcontroller chip 200 after receiving a button operation; the single-chip microcontroller chip 200 is used to output a first signal to the complementary switch unit 100 to control the complementary switch unit 100 to maintain conduction when in the powered state, and is also used to receive the power-off voltage signal to control the cut-off of the direct current connected to the complementary switch unit 100, and receive the gear-shifting voltage signal to output PWM signals with different duty cycles; the laser tube driving unit 300 is used to drive the laser tube to output laser according to the received PWM signal.

[0031] It should be noted that the complementary switch unit 100 is a complementary switch circuit composed of two complementary switch devices. One of the switch devices is an N-type metal oxide semiconductor field effect transistor (N-MOSFET), and the other is a P-type metal oxide semiconductor field effect transistor (P-MOSFET). When one of the switch devices is in the on / off state, the other switch device must also be in the on / off state, achieving the purpose of controlling power on and off, and at the same time, it can also reduce power consumption. Exemplarily, the basic working principle of the complementary switch unit 100 can be: when the input signal is at a low level, the N-MOSFET is turned off, the output signal is at a high level, and the P-MOSFET is turned off; when the input signal is at a high level, the N-MOSFET is turned on, the output signal is at a low level, and the P-MOSFET is turned on.

[0032] In this way, when the entire circuit is not powered on and started, pressing the first button unit 400 will pull down the gate potential of the P-MOSFET in the complementary switch unit 100, and the entire circuit will be powered on and started. At the same time, the single-chip microcomputer chip 200 is connected to the PWRON network of the circuit, and the single-chip microcomputer chip 200 provides a high-potential signal to reach the N-MOSFET, making the N-MOSFET turn on and output a low-potential signal. Therefore, even if the first button unit 400 is released at this time, the low-potential signal output by the N-MOSFET can still keep the P-MOSFET turned on, and the entire circuit will continue to be in the powered-on and started state. When power off is required, pressing the first button unit 400 again, the powered-on single-chip microcomputer chip 200 will recognize the power-off voltage signal and provide a low-potential signal to the gate of the N-MOSFET in the complementary switch unit 100, making the N-MOSFET turn off, thereby pulling up the gate potential of the P-MOSFET, and the P-MOSFET turns off, and the entire circuit will be powered off.

[0033] That is to say, the laser control circuit of the entire holographic sight can be started by pressing the first button unit 400, and when starting, pressing the first button unit 400 again can power off the laser control circuit of the entire holographic sight. In the process of starting and power off, not only the operation is simple and efficient, but also the two switch devices in the complementary switch unit 100 can compensate each other, so the power consumption can be effectively reduced, and the battery life of the entire circuit can be extended. At the same time, the switching speed of the complementary switch unit 100 is very fast, and high-frequency switching operations can be realized, which is particularly important for the laser control circuit of the holographic sight that requires fast response. In addition, although the existing single-chip microcomputer energy-saving control scheme has improved the battery life of the holographic sight to a certain extent, some circuits still maintain a certain power consumption in the standby state. However, in this application, by using the low-power complementary switch unit 100 to cut off the power, the power consumption caused by standby can be avoided, thereby improving its energy management efficiency and battery life.

[0034] In addition, when the signal of the single-chip microcomputer is in the working state, different duty cycle PWM signals can be output by receiving the gear-shifting voltage signal generated by the second button unit 500, so as to adjust the laser output pulse of the laser tube driving unit 300 with the PWM signals of different duty cycles. The laser output pulse is used to drive the laser tube. If the laser output pulses are different, the output power and frequency of the laser tube will change accordingly. In other methods of directly adjusting the brightness of the laser tube by adjusting the strength of the current, a relatively high current is required, resulting in poor battery life. In this application, the display brightness of the laser tube is controlled by adjusting the duty cycle of the current. The current value is always the optimal working current, and only the duty cycle is different in different gears, and the current is small, so the battery life will be longer. Moreover, by finely adjusting the duty cycle, smoother and more precise brightness adjustment can be achieved. That is, while keeping the current stable, the brightness can be finely adjusted by changing the time ratio of current on and off, thus avoiding the problems of sudden brightness change or instability that may be caused by directly adjusting the current.

[0035] Exemplarily, the second button unit 500 can be set to include two buttons, one is the gear + button, and the other is the gear - button, and PWM signals of multiple gears (PWM signals of multiple duty cycles) are preset. Then, the single-chip microcomputer can be used to recognize the plus and minus commands of the gears by counting, so as to output PWM signals with corresponding duty cycles.

[0036] In summary, the signal interaction among the first button unit 400, the second button unit 500, the single-chip microcomputer chip 200, and the laser tube driving unit 300 is mainly as follows: Among them, the first button unit 400 is mainly responsible for receiving the button operations of the user, and these operations are directly related to the conduction and cut-off of the direct current connected to the complementary switch unit 100. When the user presses the first button unit 400, if the connected direct current is currently in the cut-off state (that is, the laser tube is not turned on), the direct current is controlled to conduct, so that the laser tube can be started. If the direct current has been conducted (that is, the laser tube has been turned on), pressing the first button unit 400 again will generate a power-off voltage signal to prepare to turn off the laser tube. At startup, the single-chip microcomputer chip 200 also gets powered on and starts to work. Thus, when receiving the power-off voltage signal, the complementary switch unit 100 can be controlled by the single-chip microcomputer chip 200 to disconnect the direct current supply, turning off the laser tube. Since the user can turn on and off the laser tube with a single button, the convenience of operation is enhanced.

[0037] In addition, the second button unit 500 also receives the user's button operations. Different from the first button unit 400, it is mainly used to generate a voltage signal for adjusting the gear of the laser tube output. These voltage signals for adjusting the gear are sent to the single-chip microcomputer chip 200, and the single-chip microcomputer chip 200 outputs PWM signals with different duty cycles according to the instructions. In this way, after receiving the PWM signals with different duty cycles from the single-chip microcomputer chip 200, the laser tube driving unit 300 will adjust the output pulses of the laser tube according to these signals. By changing the duty cycle of the PWM signal, the laser tube driving unit 300 can control parameters such as the output power and frequency of the laser tube, thereby realizing precise adjustment of the laser output.

[0038] In this embodiment, the circuit structures of the first button unit 400 and the second button unit 500 can refer to Figure 3 the circuit structure of the first button unit 400 therein. The SW1 port is connected to the corresponding ports of other circuits (such as the single-chip microcomputer chip 200, etc.); SW10 represents the button; R34 is a resistor. When SW10 is pressed, the voltage at the SW1 port is low; when SW10 is released, the voltage at the SW1 port becomes high, and other circuits connected thereto can judge the button operation through the voltage change at the port and execute the corresponding commands. The aforementioned "power-off voltage signal" and "voltage signal for adjusting the gear" are both realized through the voltage change of the button switch circuit.

[0039] Please refer to Figure 2 , in some embodiments of the present application, the circuit further includes an anti-reverse connection unit 600. One end of the anti-reverse connection unit 600 is connected to the input end of the complementary switch unit 100, and the other end is used to access direct current.

[0040] It should be noted that the main function of the anti-reverse connection unit 600 is to prevent the positive and negative poles of the DC power supply from being wrongly connected to the circuit, ensuring that the circuit can only work when the power supply is correctly connected. Exemplarily, the anti-reverse connection unit 600 can be composed of one or more diodes (such as Schottky diodes or rectifier diodes), and these diodes have unidirectional conductivity. When the DC power supply is correctly connected (i.e., the positive pole is connected to one end of the anti-reverse connection unit 600 and the negative pole is connected to the other end), the diode is in the forward bias state, and the current can flow smoothly, providing the required direct current for the circuit. If the DC power supply is wrongly reversely connected (i.e., the negative pole is connected to one end of the anti-reverse connection unit 600 and the positive pole is connected to the other end), the diode will be in the reverse bias state, and at this time, the diode hardly conducts electricity, effectively preventing the current from flowing into the circuit and protecting the subsequent components from damage.

[0041] In addition, the anti-reverse connection unit 600 can also be designed with MOS transistors. Exemplarily, please refer to Figure 3, in some embodiments of the present application, the reverse connection prevention unit 600 includes a terminal block J4, a terminal block J5, a capacitor C3, and a MOS transistor Q3. The gate of the MOS transistor Q3 is connected to the terminal block J5, the gate of the MOS transistor Q3 is also connected to the drain of the MOS transistor Q3 through the capacitor C3, the drain of the MOS transistor Q3 is connected to the terminal block J4, and the source of the MOS transistor Q3 is connected to the input end of the complementary switch unit 100.

[0042] It should be noted that the terminal block J4 is used to connect to the positive pole of the DC power supply, and the terminal block J5 is used to connect to the negative pole of the DC power supply. Since the gate of the MOS transistor Q3 is connected to the terminal block J5, it means that the gate potential of the MOS transistor Q3 will be directly affected by the potential of the negative pole of the connected DC power supply. The capacitor C3 is connected across the gate and drain of the MOS transistor Q3, playing a role in stabilizing the gate potential and preventing transient voltage impact.

[0043] Specifically, when the DC power supply is correctly connected (the terminal block J4 is connected to the positive pole and the terminal block J5 is connected to the negative pole), the gate potential of the MOS transistor Q3 is negative relative to its source (because the source is ultimately connected to the rest of the circuit, and its potential may be positive or zero depending on the specific working state of the circuit). This causes the MOS transistor Q3 to be in the conducting state, allowing current to flow from the drain (J4) through the MOS transistor Q3 to the source (the input end of the complementary switch unit 100). At the same time, the capacitor C3 helps to stabilize the gate potential of the MOS transistor Q3 during this process, preventing malfunction caused by voltage fluctuations.

[0044] Please refer to Figure 3 , in some embodiments of the present application, the complementary switch unit 100 includes a resistor R8, a resistor R14, a resistor R15, a diode D1, a P-type MOS transistor Q2, and an N-type MOS transistor M1. The source of the P-type MOS transistor Q2 is used to connect to the direct current, the source of the P-type MOS transistor Q2 is also connected to the drain of the N-type MOS transistor M1 through the resistor R8, the gate of the P-type MOS transistor Q2 is connected to the drain of the N-type MOS transistor M1, the gate of the P-type MOS transistor Q2 is also connected to the anode of the diode D1, the cathode of the diode D1 is connected to the first key unit 400 and the single-chip microcomputer chip 200, and the drain of the P-type MOS transistor Q2 is used to generate a DC voltage VCC_3.3V. The source of the N-type MOS transistor M1 is connected to the gate of the N-type MOS transistor M1 through the resistor R14, the source of the N-type MOS transistor M1 is also grounded, and the gate of the N-type MOS transistor M1 is connected to the laser tube driving unit 300 and the single-chip microcomputer chip 200 through the resistor R15.

[0045] It should be noted that when the circuit is not powered on, pressing the first key unit 400 will turn on the diode D1, thereby pulling down the gate potential of the P-type MOS transistor Q2, causing the P-type MOS transistor Q2 to turn on, and the single-chip microcomputer chip 200 will also start accordingly. The single-chip microcomputer is connected to the PWRON network of the circuit, so that a high-potential signal can be provided to the N-type MOS transistor M1, causing the N-type MOS transistor M1 to turn on and output a low-potential signal. At this time, even if the first key unit 400 is released, this low-potential signal can still keep the P-type MOS transistor Q2 in the on state, and the entire circuit enters the normal working state. Among them, the resistors R14 and R15 play a role in current limiting and voltage limiting to protect the N-type MOS transistor M1 and the single-chip microcomputer chip 200. When shutdown is required, press the first key unit 400 again, and the single-chip microcomputer chip 200 will recognize the power-off command and provide a low-potential signal to the gate of the N-type MOS transistor M1, causing the N-type MOS transistor M1 to turn off. At the same time, the resistor R8 pulls up the gate potential of the P-type MOS transistor Q2, and the P-type MOS transistor Q2 turns off, and the circuit powers off and stops working.

[0046] Please refer to Figure 3 , in some embodiments of the present application, the complementary switch unit 100 further includes a capacitor C4 and a capacitor C8; the drain of the P-type MOS transistor Q2 is grounded through the parallel-connected capacitor C4 and the capacitor C8.

[0047] It should be noted that after the capacitors C4 and C8 are connected in parallel, a low-pass filter is formed. When there are high-frequency noises or ripples in the DC voltage VCC_3.3V (generated by the drain of the P-type MOS transistor Q2), these capacitors can absorb and store this high-frequency energy, thereby reducing or eliminating their influence on the subsequent circuit. In addition, the capacitors C4 and C8 can also help stabilize the output voltage of the DC voltage VCC_3.3V. When the load current changes suddenly, the capacitor can quickly release or absorb charge to compensate for the transient change of the voltage, thereby maintaining the relative stability of the output voltage.

[0048] Please refer to Figure 1 and Figure 4 , in some embodiments of the present application, the single-chip microcomputer chip 200 is a chip U9 of the STM8L151G6U6 model. The pin PB0 of the chip U9 is connected to the cathode of the diode D1, the pin PD1 of the chip U9 is connected to the resistor R15, the pin VDD of the chip U9 is connected to the DC voltage VCC_3.3V, and the pins PB1 and PB2 of the chip U9 are connected to the second key unit 500.

[0049] It should be noted that the single-chip microcomputer chip 200 is connected to the PWRON network and the PWM network of the laser tube driving unit 300, so that when the single-chip microcomputer chip 200 starts up, the driving voltage can be provided through the PWRON network, and the laser output pulse output by the laser tube driving unit 300 can be adjusted through the PWM network. When the user selects different gears by using the second button unit 500, the single-chip microcomputer chip 200 identifies the gear signal through the pin PB1 and the pin PB2, emits PWM signals with different duty cycles, controls the laser output pulse output by the laser tube driving unit 300, controls the duty cycle of the laser tube current, and realizes the adjustment of the display brightness of the laser tube.

[0050] Please refer to Figure 3 , in some embodiments of the present application, the first button unit 400 includes a tactile switch SW10 and a resistor R34. One end of the tactile switch SW10 is grounded, and the other end is connected to the cathode of the diode D1. The cathode of the diode D1 is also connected to the DC voltage VCC_3.3V through the resistor R34.

[0051] It should be noted that when the entire circuit is not started, pressing the tactile switch SW10 at this time will result in a low voltage at the port of the tactile switch SW10, thereby pulling down the gate potential of the P-type MOS transistor Q2 and causing the P-type MOS transistor Q2 to conduct, and the single-chip microcomputer chip 200 will also start up accordingly. When the tactile switch SW10 is released, this low-potential signal can still keep the P-type MOS transistor Q2 in a conducting state, and the entire circuit enters the normal working state. When shutdown is required, pressing the first button unit 400 again, the single-chip microcomputer chip 200 will recognize the power-off command and provide a low-potential signal to the gate of the N-type MOS transistor M1, causing the N-type MOS transistor M1 to cut off.

[0052] Please refer to Figure 5 , in some embodiments of the present application, the laser tube driving unit 300 includes a triode Q1, a triode Q5, a resistor R2, and a resistor R1. The base of the triode Q1 is connected to the pin PD2 of the chip U9. The base of the triode Q1 is connected to the pin PD1 of the chip U9 through the resistor R2. The base of the triode Q1 is also connected to the collector of the triode Q5. The emitter of the triode Q1 is connected to the base of the triode Q5. The emitter of the triode Q1 is connected to the emitter of the triode Q5 through the resistor R1. The emitter of the triode Q5 is grounded. The collector of the triode Q1 is used to be electrically connected to one end of the laser tube, and the other end of the laser tube is used to be connected to the DC voltage VCC_3.3V.

[0053] It should be noted that Figure 5The LD1 in it is an exemplary laser tube. This laser tube is composed of two diodes connected in reverse. One is used for emitting light and the other is used for detection. The two are integrated in one laser tube. Among them, the resistor R2 is used to adjust the magnitude of the voltage reaching the base of the triode Q1; the combined use of the resistor R1 and the triode Q5 can make the triode Q5 conduct when the current in the circuit is higher than the set threshold, so that the voltage reaching the base of the triode Q1 decreases, and the current flowing through the laser tube becomes smaller, thereby stabilizing the maximum working current of the laser tube.

[0054] The embodiment of the present application also provides a holographic sight, which includes the laser control circuit of any one of the above holographic sights. This holographic sight controls the laser tube to be turned on / off and the brightness to change through the laser control circuit of the holographic sight provided by the present application.

[0055] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present application, the present application can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A laser control circuit for a holographic sight, characterized in that, It includes a complementary switch unit, a single-chip microcomputer chip, a laser tube driving unit, a first button unit, and a second button unit; the complementary switch unit, the laser tube driving unit, the first button unit, and the second button unit are all electrically connected to the single-chip microcomputer chip respectively. The first button unit is also electrically connected to the complementary switch unit. The input end of the complementary switch unit is used to access direct current, and the output end of the complementary switch unit is used to be electrically connected to the laser tube. The laser tube driving unit is also electrically connected to the complementary switch unit and is used to be electrically connected to the laser tube; Among them, the first button unit is used to receive button operations to control the conduction of the direct current accessed to the complementary switch unit, and when the direct current accessed to the complementary switch unit is conducted, it receives button operations and sends a power-off voltage signal to the single-chip microcomputer chip; The second button unit is used to send a gear-shifting voltage signal to the single-chip microcomputer chip after receiving a button operation; The single-chip microcomputer chip is used to output a first signal to the complementary switch unit to control the complementary switch unit to maintain conduction in the powered state, and is also used to receive the power-off voltage signal to control the cut-off of the direct current accessed to the complementary switch unit, and receive the gear-shifting voltage signal to output PWM signals with different duty cycles; The laser tube driving unit is used to drive the laser tube to output laser according to the received PWM signal.

2. The circuit according to claim 1, wherein The circuit further includes an anti-reverse connection unit. One end of the anti-reverse connection unit is connected to the input end of the complementary switch unit, and the other end is used to access direct current.

3. The circuit according to claim 2, wherein The anti-reverse connection unit includes a terminal block J4, a terminal block J5, a capacitor C3, and a MOS transistor Q3; The gate of the MOS transistor Q3 is connected to the terminal block J5. The gate of the MOS transistor Q3 is also connected to the drain of the MOS transistor Q3 through the capacitor C3. The drain of the MOS transistor Q3 is connected to the terminal block J4, and the source of the MOS transistor Q3 is connected to the input end of the complementary switch unit.

4. The circuit according to claim 1, wherein The complementary switch unit includes a resistor R8, a resistor R14, a resistor R15, a diode D1, a P-type MOS transistor Q2, and an N-type MOS transistor M1; The source of the P-type MOS transistor Q2 is used to access direct current. The source of the P-type MOS transistor Q2 is also connected to the drain of the N-type MOS transistor M1 through the resistor R8. The gate of the P-type MOS transistor Q2 is connected to the drain of the N-type MOS transistor M1. The gate of the P-type MOS transistor Q2 is also connected to the anode of the diode D1. The cathode of the diode D1 is connected to the first button unit and the single-chip microcomputer chip. The drain of the P-type MOS transistor Q2 is used to generate a DC voltage VCC_3.3V; The source of the N-type MOS transistor M1 is connected to the gate of the N-type MOS transistor M1 through the resistor R14. The source of the N-type MOS transistor M1 is also grounded. The gate of the N-type MOS transistor M1 is connected to the laser tube driving unit and the single-chip microcomputer chip through the resistor R15.

5. The circuit according to claim 4, wherein The complementary switch unit further includes a capacitor C4 and a capacitor C8; the drain of the P-type MOS transistor Q2 is grounded through the parallel-connected capacitor C4 and capacitor C8.

6. The circuit according to claim 4 or 5, characterized in that, The single-chip microcomputer chip is the chip U9 of the model STM8L151G6U6; The pin PB0 of the chip U9 is connected to the cathode of the diode D1, the pin PD1 of the chip U9 is connected to the resistor R15, the pin VDD of the chip U9 is connected to the DC voltage VCC_3.3V, and the pins PB1 and PB2 of the chip U9 are connected to the second button unit.

7. The circuit according to claim 6, characterized in that, The first button unit includes a tactile switch SW10 and a resistor R34; One end of the tactile switch SW10 is grounded, and the other end is connected to the cathode of the diode D1. The cathode of the diode D1 is also connected to the DC voltage VCC_3.3V through the resistor R34.

8. The circuit according to claim 7, wherein The laser tube driving unit includes a triode Q1, a triode Q5, a resistor R2, and a resistor R1; The base of the triode Q1 is connected to the pin PD2 of the chip U9. The base of the triode Q1 is connected to the pin PD1 of the chip U9 through the resistor R2. The base of the triode Q1 is also connected to the collector of the triode Q5. The emitter of the triode Q1 is connected to the base of the triode Q5. The emitter of the triode Q1 is connected to the emitter of the triode Q5 through the resistor R1. The emitter of the triode Q5 is grounded. The collector of the triode Q1 is used to be electrically connected to one end of the laser tube, and the other end of the laser tube is used to be connected to the DC voltage VCC_3.3V.

9. A holographic sight, characterized in that, It includes a laser control circuit of a holographic sight according to any one of claims 1-8.

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