Light source brightness gear control circuit

Abstract

The invention discloses a light source brightness gear control circuit, and relates to the technical field of LED illumination. The light source brightness gear control circuit comprises a main control module, a light source module and a light source brightness adjusting module, the light source module comprises m LED light sources; the light source brightness adjusting module comprises n brightness adjusting sub-modules; each brightness adjusting sub-module comprises m current limiting units; the main control module comprises n brightness adjusting signal output ends; in the same brightness adjusting sub-module, the first ends of the current limiting units are electrically connected with the same brightness adjusting signal output end, and the second ends of the current limiting units are electrically connected with the LED light sources in a one-to-one correspondence mode. The main control module is used for providing a brightness adjustment control signal for each brightness adjustment sub-module; and the brightness adjusting sub-module is used for controlling the current signal brightness gear provided for each LED light source according to the brightness adjusting control signal. According to the invention, the manufacturing cost of the control circuit is reduced, and the flexibility and stability of brightness gear adjustment are improved.

Description

Technical Field

[0001] This invention relates to the field of LED lighting technology, and in particular to a light source brightness level control circuit. Background Technology

[0002] LED brightness adjustment technology is widely used in optical aiming devices, especially in internal red / green dot sights. By precisely controlling the brightness of the LED light source, a clear aiming pattern can be achieved under different ambient light conditions, thereby improving aiming accuracy and user experience.

[0003] Existing LED light source brightness level control circuits for internal red / green dot sights typically employ a design where each brightness level of each light source corresponds to a separate physical I / O port on a microcontroller unit (MCU). For example, eight physical I / O ports are used to control four brightness levels for two light sources. However, since each brightness level of each light source requires an independent physical I / O port, the number of required physical I / O ports increases exponentially with the number of light source paths and brightness levels. This results in high control circuit costs, difficulty in miniaturizing the circuit board, and complex wiring designs, thus limiting the miniaturization and reliability improvement of internal red / green dot sights. Using an MCU with fewer physical I / O ports necessitates sacrificing the number of light source paths or brightness levels, impacting product functionality. Summary of the Invention

[0004] This invention provides a light source brightness level control circuit, which enables simultaneous multi-level brightness control of multiple LED light sources through a limited brightness adjustment signal output terminal, thereby reducing the manufacturing cost of the control circuit and improving the flexibility and stability of brightness level adjustment.

[0005] The first aspect of the present invention provides a light source brightness level control circuit, which includes: a main control module, a light source module, and a light source brightness adjustment module;

[0006] The light source module includes m LED light sources; m is a positive integer greater than or equal to 1;

[0007] The light source brightness adjustment module includes n brightness adjustment sub-modules; each brightness adjustment sub-module includes m current limiting units; the main control module includes n brightness adjustment signal output terminals; n is a positive integer greater than or equal to 2;

[0008] In the same brightness adjustment submodule, the first end of each current limiting unit is electrically connected to the same brightness adjustment signal output end, and the second end of each current limiting unit is electrically connected to each LED light source in a corresponding manner.

[0009] The main control module is used to provide brightness adjustment control signals to each of the brightness adjustment sub-modules respectively;

[0010] The brightness adjustment submodule is used to control the brightness level of the current signal provided to each of the LED light sources according to the brightness adjustment control signal.

[0011] Optionally, the current limiting unit includes a current limiting resistor;

[0012] The resistance values ​​of the current-limiting resistors in each of the brightness adjustment submodules electrically connected to the same LED light source are different.

[0013] Optionally, the n brightness adjustment sub-modules are respectively the first brightness adjustment sub-module to the nth brightness adjustment sub-module;

[0014] In each of the brightness adjustment sub-modules electrically connected to the same LED light source, the resistance value of the current limiting resistor in the i-th brightness adjustment sub-module is greater than the resistance value of the current limiting resistor in the (i+1)-th brightness adjustment sub-module.

[0015] Where 1≤i≤n-1, and i is a positive integer.

[0016] Optionally, the light source brightness level control circuit further includes: m switching modules corresponding one-to-one with each of the m LED light sources;

[0017] The switching module is electrically connected between the current limiting unit and the LED light source;

[0018] The main control module also includes m switch signal output terminals, each of which is electrically connected to a corresponding switch module; the main control module is also used to provide switch control signals to each switch module to control the on / off state of each LED light source.

[0019] Optionally, the switching module includes a transistor;

[0020] The first terminal of the transistor is electrically connected to the current limiting unit, and the second terminal of the transistor is electrically connected to the LED light source; the gate of the transistor is electrically connected to the corresponding switch signal output terminal.

[0021] Optionally, the light source brightness level control circuit further includes: n anti-reverse modules, each corresponding to one of the n brightness adjustment sub-modules;

[0022] The anti-reverse module is electrically connected between the brightness adjustment signal output terminal and each current limiting unit of the same brightness adjustment submodule.

[0023] Optionally, the anti-reverse module includes an anti-reverse diode;

[0024] The cathode of the LED light source is grounded, and the anode of the LED light source is electrically connected to the current limiting unit;

[0025] The anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the cathode of the anti-reverse diode is electrically connected to the current limiting unit.

[0026] Optionally, the anti-reverse module includes an anti-reverse diode; the main control module also includes m switch control terminals corresponding one-to-one with each of the m LED light sources;

[0027] The cathode of the LED light source is electrically connected to the switch control terminal, and the anode of the LED light source is electrically connected to the current limiting unit.

[0028] The anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the cathode of the anti-reverse diode is electrically connected to the current limiting unit.

[0029] Optionally, the anti-reverse module includes an anti-reverse diode;

[0030] The anode of the LED light source is electrically connected to an external power supply terminal, and the cathode of the LED light source is electrically connected to the current limiting unit.

[0031] The cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the anode of the anti-reverse diode is electrically connected to the current limiting unit.

[0032] Optionally, the anti-reverse module includes an anti-reverse diode; the main control module also includes m switch control terminals corresponding one-to-one with each of the m LED light sources;

[0033] The anode of the LED light source is electrically connected to the switch control terminal, and the cathode of the LED light source is electrically connected to the current limiting unit.

[0034] The cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the anode of the anti-reverse diode is electrically connected to the current limiting unit.

[0035] The technical solution of this invention sets up a main control module, a light source module, and a light source brightness adjustment module in the light source brightness level control circuit. Furthermore, it sets up m LED light sources in the light source module, n brightness adjustment sub-modules in the light source brightness adjustment module, and m current limiting units in each brightness adjustment sub-module. This allows the second terminal of each current limiting unit in each brightness adjustment sub-module to be electrically connected to each LED light source in a one-to-one correspondence. Consequently, the brightness adjustment sub-module can adjust the brightness level of the LED light source by limiting the current flowing through it. Meanwhile, by setting n brightness adjustment signal output terminals in the main control module 1, each brightness adjustment signal output terminal of the main control module can be electrically connected to each brightness adjustment sub-module in a one-to-one correspondence. In the same brightness adjustment sub-module, the first terminal of each current limiting unit is electrically connected to the same brightness adjustment signal output terminal. This allows the main control module to provide brightness adjustment control signals to each brightness adjustment sub-module through each brightness adjustment signal output terminal. The brightness adjustment sub-module can then control the brightness level of the current signal provided to each LED light source according to the brightness adjustment control signal. This achieves synchronous multi-level brightness control of each LED light source through a limited number of brightness adjustment signal output terminals, reducing the manufacturing cost of the control circuit and improving the flexibility and stability of brightness level adjustment.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of a light source brightness level control circuit provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Figure 1 This is a schematic diagram of a light source brightness level control circuit provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the light source brightness level control circuit includes: a main control module 1, a light source module 2, and a light source brightness adjustment module 3; the light source module 2 includes m LED light sources 01; m is a positive integer greater than or equal to 1; the light source brightness adjustment module 3 includes n brightness adjustment sub-modules 31; each brightness adjustment sub-module 31 includes m current limiting units 02; the main control module 1 includes n brightness adjustment signal output terminals 11; n is a positive integer greater than or equal to 2; in the same brightness adjustment sub-module 31, the first terminal of each current limiting unit 02 is electrically connected to the same brightness adjustment signal output terminal 11, and the second terminal of each current limiting unit 02 is electrically connected to each LED light source 01 in a one-to-one correspondence; the main control module 1 is used to provide brightness adjustment control signals to each brightness adjustment sub-module 31 respectively; the brightness adjustment sub-module 31 is used to control the brightness level of the current signal provided to each LED light source 01 according to the brightness adjustment control signal.

[0046] The light source module 2 includes m LED light sources 01, where m is a positive integer greater than or equal to 1. The LED light sources 01 are specifically used to generate aiming patterns for the inner red / green dot sight. For example, each LED light source 01 can be used to generate patterns such as "dot," "cross," and "circle" to assist users in accurately aiming at targets in different scenarios. The light source brightness adjustment module 3 includes n brightness adjustment sub-modules 31, where n is a positive integer greater than or equal to 2. Each brightness adjustment sub-module 31 includes m current limiting units 02, so that the second end of each current limiting unit 02 in each brightness adjustment sub-module 31 can be electrically connected to each LED light source 01 in a one-to-one correspondence. For example, the current limiting unit 02 may include a current limiting resistor so that the brightness adjustment submodule 31 can limit the current flowing through the LED light source 01 through the resistance value of the current limiting unit 02, ensuring that the current flowing through each LED light source 01 is precisely matched to the target brightness level, thereby realizing the brightness level adjustment of the LED light source 01, so that the inner red / green dot sight can adapt to different ambient light conditions, such as strong light, weak light, and night.

[0047] Meanwhile, the main control module 1 includes n brightness adjustment signal output terminals 11, so that each brightness adjustment signal output terminal 11 of the main control module 1 can be electrically connected to each brightness adjustment sub-module 31 in a one-to-one correspondence. In the same brightness adjustment sub-module 31, the first terminal of each current limiting unit 02 is electrically connected to the same brightness adjustment signal output terminal 11. This allows the main control module 1 to provide brightness adjustment control signals to each brightness adjustment sub-module 31 through each brightness adjustment signal output terminal 11, so that the brightness adjustment sub-module 31 can control the brightness level of the current signal provided to each LED light source 01 according to the brightness adjustment control signal, thereby realizing the adjustment of the brightness level of each LED light source 01.

[0048] For example, the main control module 1 may include an MCU U1, where n pins can correspond to n brightness adjustment signal output terminals 11. Figure 2 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention, as shown below. Figure 2As shown, pins 1-16, 1-15, 1-14, and 1-13 of U1 can be four brightness adjustment signal output terminals 11. Pins 1-16, 1-15, 1-14, and 1-13 of U1 are electrically connected to the first brightness adjustment submodule 311, the second brightness adjustment submodule 312, the third brightness adjustment submodule 313, and the fourth brightness adjustment submodule 314 of the light source brightness adjustment module 3, respectively. This allows the main control module 1 to control the output of high-level or low-level signals from each brightness adjustment signal output terminal 11, thereby controlling the circuit between each light source brightness adjustment module 3 and its corresponding LED light source 01 to be in a conducting or disconnected state, and thus controlling the brightness level of the current signal provided to each LED light source 01.

[0049] Optionally, the current limiting unit 02 includes a current limiting resistor; the resistance values ​​of the current limiting resistors in each brightness adjustment submodule electrically connected to the same LED light source are different. (Continue to refer to...) Figure 2The light source module 2 includes a first LED light source 011, a second LED light source 012, and a third LED light source 013; the first brightness adjustment submodule 311 includes a first first resistor R11, a first second resistor R12, and a first third resistor R13; the second brightness adjustment submodule 312 includes a second first resistor R21, a second second resistor R22, and a second third resistor R23; the third brightness adjustment submodule 313 includes a third first resistor R31, a third second resistor R22, and a third third resistor R33; and the fourth brightness adjustment submodule 314 includes a fourth first resistor R41, a fourth second resistor R42, and a fourth third resistor R43. The resistance values ​​of the first first resistor R11, the second first resistor R21, the third first resistor R31, and the fourth first resistor R41, which are electrically connected to the first LED light source 011, are different; the resistance values ​​of the first second resistor R12, the second second resistor R22, the third second resistor R32, and the fourth second resistor R42, which are electrically connected to the second LED light source 012, are different; and the resistance values ​​of the first third resistor R13, the second third resistor R23, the third third resistor R33, and the fourth third resistor R43, which are electrically connected to the third LED light source 013, are different. Therefore, when the main control module 1 controls the on / off state of the circuit between each light source brightness adjustment module 3 and each LED light source 01 through each brightness adjustment signal output terminal 11 in a combined coding manner, the brightness level of the current signal provided to each LED light source 01 will change in multiple gradients, so as to realize the multi-gradient brightness level adjustment of each LED light source 01. For example, the main control module 1 can control the circuit between the first brightness adjustment submodule 311 and each LED light source 01 through each brightness adjustment signal output terminal 11, and the circuits between the second brightness adjustment submodule 312, the third brightness adjustment submodule 313, the fourth brightness adjustment submodule 314 and each LED light source 01 are all connected. Disconnect; the main control module 1 can also control the circuit between the second brightness adjustment submodule 312 and each LED light source 01 to be connected through each brightness adjustment signal output terminal 11, and the circuit between the first brightness adjustment submodule 311, the third brightness adjustment submodule 313, the fourth brightness adjustment submodule 314 and each LED light source 01 is disconnected; the main control module 1 can also control the circuit between the first brightness adjustment submodule 311 and the second brightness adjustment submodule 312 and each LED light source 01 to be connected through each brightness adjustment signal output terminal 11, and the circuit between the third brightness adjustment submodule 313 and the fourth brightness adjustment submodule 314 and each LED light source 01 is disconnected.

[0050] By setting n brightness adjustment signal output terminals 11 in the main control module 1, n brightness adjustment sub-modules 31 in the light source brightness adjustment module 3, and m current limiting units 02 in each brightness adjustment sub-module 31, multi-gradient brightness level adjustment of each LED light source 01 can be achieved through a combination coding method via the brightness adjustment signal output terminals 11. Simultaneously, each current limiting unit 02 independently controls the current flowing through one LED light source 01, ensuring that the brightness level adjustment of each LED light source 01 is independent and accurate, thereby improving the flexibility and stability of brightness level adjustment. Furthermore, compared to the traditional brightness level control circuit where each brightness level of each light source requires an independent physical I / O port, this embodiment achieves simultaneous multi-level brightness control of multiple LED light sources through a limited number of brightness adjustment signal output terminals 11, reducing the manufacturing cost of the control circuit and providing an efficient, low-cost, and miniaturized solution for internal red / green dot sights.

[0051] In this embodiment, a main control module, a light source module, and a light source brightness adjustment module are set in the light source brightness level control circuit. Furthermore, m LED light sources are set in the light source module, n brightness adjustment sub-modules are set in the light source brightness adjustment module, and m current limiting units are set in each brightness adjustment sub-module. This allows the second terminal of each current limiting unit in each brightness adjustment sub-module to be electrically connected to each LED light source in a one-to-one correspondence. Consequently, the brightness adjustment sub-module can adjust the brightness level of the LED light source by limiting the current flowing through it. Meanwhile, by setting n brightness adjustment signal output terminals in the main control module 1, each brightness adjustment signal output terminal of the main control module can be electrically connected to each brightness adjustment sub-module in a one-to-one correspondence. In the same brightness adjustment sub-module, the first terminal of each current limiting unit is electrically connected to the same brightness adjustment signal output terminal. This allows the main control module to provide brightness adjustment control signals to each brightness adjustment sub-module through each brightness adjustment signal output terminal. The brightness adjustment sub-module can then control the brightness level of the current signal provided to each LED light source according to the brightness adjustment control signal. This achieves synchronous multi-level brightness control of each LED light source through a limited number of brightness adjustment signal output terminals, reducing the manufacturing cost of the control circuit and improving the flexibility and stability of brightness level adjustment.

[0052] Optionally, the n brightness adjustment sub-modules are respectively the first brightness adjustment sub-module to the nth brightness adjustment sub-module; among the brightness adjustment sub-modules electrically connected to the same LED light source, the resistance value of the current limiting resistor in the i-th brightness adjustment sub-module is greater than the resistance value of the current limiting resistor in the (i+1)-th brightness adjustment sub-module; where 1≤i≤n-1, and i is a positive integer.

[0053] Specifically, the n brightness adjustment submodules are designated as brightness adjustment submodule 1 to brightness adjustment submodule n, and are electrically connected one-to-one with the brightness adjustment output terminals 11 of the n brightness adjustment signal output terminals 11 of the main control module 1. Each of the brightness adjustment submodules 1 to n includes m current-limiting resistors, and in each brightness adjustment submodule electrically connected to the same LED light source, the resistance value of the current-limiting resistor in the i-th brightness adjustment submodule is greater than the resistance value of the current-limiting resistor in the (i+1)-th brightness adjustment submodule. Where 1≤i≤n-1, and i is a positive integer, that is, in each brightness adjustment submodule electrically connected to the same LED light source, the resistance value of the current limiting resistor decreases sequentially from the first brightness adjustment submodule to the nth brightness adjustment submodule. Therefore, when the circuit between the first brightness adjustment submodule to the nth brightness adjustment submodule and each LED light source 01 is connected, the current value flowing through the LED light source 01 will increase sequentially, so that the multi-gradient brightness level adjustment of each LED light source 01 can be realized through the combined coding method of each brightness adjustment signal output terminal 11.

[0054] For example, continue to refer to Figure 2 The resistance values ​​of the first first resistor R11, the second first resistor R21, the third first resistor R31, and the fourth first resistor R41, which are electrically connected to the first LED light source 011, decrease sequentially; the resistance values ​​of the first second resistor R12, the second second resistor R22, the third second resistor R32, and the fourth second resistor R42, which are electrically connected to the second LED light source 012, decrease sequentially; and the resistance values ​​of the first third resistor R13, the second third resistor R23, the third third resistor R33, and the fourth third resistor R43, which are electrically connected to the third LED light source 013, decrease sequentially. This ensures that when the circuit between the first brightness adjustment submodule 311 and the LED light source 01 is only controlled by each brightness adjustment signal output terminal 11, the current flowing through each LED light source 01... The current flowing through LED light source 01 can be I0. When only the loop between the second brightness adjustment submodule 312 and LED light source 01 is controlled by each brightness adjustment signal output terminal 11, the current flowing through each LED light source 01 can be 2I0. When only the loop between the third brightness adjustment submodule 313 and LED light source 01 is controlled by each brightness adjustment signal output terminal 11, the current flowing through each LED light source 01 can be 4I0. When only the loop between the fourth brightness adjustment submodule 314 and LED light source 01 is controlled by each brightness adjustment signal output terminal 11, the current flowing through each LED light source 01 can be 8I0. I0 can be understood as the current value corresponding to the lowest brightness level of LED light source 01. Thus, 15 levels of brightness adjustment for each LED light source 01 can be achieved through a combination coding method using each brightness adjustment signal output terminal 11, with current values ​​corresponding to I0 to 15I0 respectively, to cover various brightness requirements.

[0055] Through n brightness adjustment signal output terminals 11, n brightness adjustment sub-modules 31, and m current limiting units 02 in each brightness adjustment sub-module 31, it is possible to achieve 2 n The -1 level brightness adjustment improves the flexibility and stability of brightness level adjustment, while reducing the manufacturing cost of the control circuit, providing an efficient, low-cost, and miniaturized solution for internal red / green dot sights.

[0056] Optional, continue to refer to Figure 2 The light source brightness level control circuit also includes: m switch modules 4 corresponding one-to-one with m LED light sources 01; the switch modules 4 are electrically connected between the current limiting unit 02 and the LED light sources 01; the main control module 1 also includes m switch signal output terminals 12, each switch signal output terminal 12 being electrically connected one-to-one with each switch module 4; the main control module 1 is also used to provide switch control signals to each switch module 4 respectively to control the opening and closing state of each LED light source 01.

[0057] Specifically, each of the m switch modules 4 is electrically connected to one of the m current limiting units 02 and m LED light sources 01 in each brightness adjustment submodule 31. The main control module 1 also includes m switch signal output terminals 12, and each switch signal output terminal 12 is electrically connected to each switch module 4. For example, the m switch modules 4 include a first switch module 41 electrically connected to the first LED light source 011, a second switch module 42 electrically connected to the second LED light source 012, and a third switch module 43 electrically connected to the third LED light source 013. Pins 1-4, 1-5, and 1-7 in U1 can be three switch signal output terminals 12, and pins 1-4, 1-5, and 1-7 are electrically connected to the first switch module 41, the second switch module 42, and the third switch module 43, respectively. This allows the main control module 1 to provide switch control signals to each switch module 4 via each switch signal output terminal 12, thereby controlling the on / off state of the circuit between each LED light source 01 and the brightness adjustment module 3. This enables independent control of the on / off state of each LED light source 01 as needed, allowing users to flexibly select "dot," "cross," or "circle" graphic paths to adapt to different aiming scenarios, enhancing the practicality of the red / green dot sight. The switch module 4 collaborates with the brightness adjustment module 3. When an LED light source 01 is activated by the switch module 4, the brightness adjustment module 3 can adjust the current flowing through that LED light source 01 via the current limiting unit 02, achieving multi-level brightness adjustment of the LED light source 01. This allows users to select specific graphic paths and brightness levels according to their aiming needs, improving the flexibility and stability of brightness level adjustment.

[0058] Optional, continue to refer to Figure 2The switching module 4 includes a transistor; the first terminal of the transistor is electrically connected to the current limiting unit 02, and the second terminal of the transistor is electrically connected to the LED light source 01; the gate of the transistor is electrically connected to the corresponding switching signal output terminal 12.

[0059] Specifically, the switching module 4 includes a transistor, enabling the main control module 1 to control the conduction state of the transistor via the switching signal output terminal 12, thereby controlling the on / off state of the LED light source 01. For example, the transistor may include an N-type MOSFET, the drain of which may be electrically connected to the current limiting unit 02, the source of which may be electrically connected to the LED light source 01, and the gate of which may be electrically connected to the switching signal output terminal 12. The first switch module 4, the second switch module 42, and the third switch module 43 can be the first transistor Q1, the second transistor Q2, and the third transistor Q3, respectively. When pins 1-4, 1-5, and 1-7 of U1 output a high level to the gates of the first transistor Q1, the second transistor Q2, and the third transistor Q3, respectively, the first LED light source 011, the second LED light source 012, and the third LED light source 013 will be turned on; when pins 1-4, 1-5, and 1-7 of U1 output a low level to the gates of the first transistor Q1, the second transistor Q2, and the third transistor Q3, respectively, the first LED light source 011, the second LED light source 012, and the third LED light source 013 will be turned off. The transistors enable precise control of the on / off state of the LED light source 01, reducing the manufacturing cost of the control circuit and supporting miniaturized design.

[0060] Meanwhile, when the first LED light source 011, the second LED light source 012, and the third LED light source 01 are turned on, each brightness adjustment signal output terminal 11 can dynamically adjust the current flowing from the drain to the source of the first transistor Q1, the second transistor Q2, and the third transistor Q3 by using a combination encoding method of outputting a high level to control the circuit between the corresponding brightness adjustment submodule 31 and the LED light source 01 and outputting a low level to control the circuit between the corresponding brightness adjustment submodule 31 and the LED light source 01. This allows for adjustment of the current value flowing through the first LED light source 011, the second LED light source 012, and the third LED light source 013, thereby achieving multi-level brightness adjustment of each LED light source 01 and improving the flexibility and stability of brightness level adjustment.

[0061] Optional, continue to refer to Figure 2 The light source brightness level control circuit also includes: n anti-reverse modules 5, each corresponding to one of the n brightness adjustment sub-modules 31; the anti-reverse modules 5 are electrically connected between the brightness adjustment signal output terminal 11 and each current limiting unit 02 of the same brightness adjustment sub-module 31.

[0062] Specifically, the anti-reverse module 5 is used to ensure unidirectional current flow in the brightness level control circuit of the light source, preventing reverse current interference. Specifically, n anti-reverse modules are configured one-to-one with n brightness adjustment sub-modules 31, and the anti-reverse module 5 is electrically connected between the brightness adjustment signal output terminal 11 and each current limiting unit 02 of the same brightness adjustment sub-module 31. This ensures that the anti-reverse module 5 can ensure that the current between the brightness adjustment signal output terminal 11 and the current limiting unit 02 can only flow from high potential to low potential, effectively isolating reverse current. This avoids errors in the current value flowing through each LED light source 01 due to current backflow, improving the accuracy and safety of brightness level adjustment.

[0063] Optional, continue to refer to Figure 2 The anti-reverse module 5 includes an anti-reverse diode; the cathode of the LED light source 01 is grounded, and the anode of the LED light source 01 is electrically connected to the current limiting unit 02; the anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the cathode of the anti-reverse diode is electrically connected to the current limiting unit 02.

[0064] Specifically, the anti-reverse module 5 may include anti-reverse diodes. These diodes may include a first anti-reverse diode D1, a second anti-reverse diode D2, a third anti-reverse diode D3, and a fourth anti-reverse diode D4, respectively, which are configured to isolate reverse current from the first brightness adjustment submodule 311, the second brightness adjustment submodule 312, the third brightness adjustment submodule 313, and the fourth brightness adjustment submodule 314. Simultaneously, the cathode of the LED light source 01 is grounded, and the anode of the LED light source 01 is electrically connected to the current limiting unit 02, meaning all LED light sources 01 are connected with a common cathode. At this time, the anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the cathode of the anti-reverse diode is electrically connected to the current limiting unit 02. When the brightness adjustment signal output terminal 11 outputs a high level, the anti-reverse diode will conduct in the forward direction. For example, when pins 1-16 of U1 output a high level, current will flow sequentially through the first anti-reverse diode D1 and the first brightness adjustment submodule 311 into the first LED light source 011, the second LED light source 012, and the third LED light source 013, ensuring that the current flowing through each LED light source 01 is I0. The anti-reverse diode can prevent reverse current interference, reduce the risk of failure, and at the same time ensure precise control of the current value flowing through each LED light source 01, improving the accuracy and safety of brightness level adjustment.

[0065] Optional, Figure 3 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention, as shown below. Figure 3As shown, the anti-reverse module 5 includes an anti-reverse diode; the main control module 1 also includes m switch control terminals 13 corresponding one-to-one with the m LED light sources 01; the cathode of the LED light source 01 is electrically connected to the switch control terminal 13, and the anode of the LED light source 01 is electrically connected to the current limiting unit 02; the anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the cathode of the anti-reverse diode is electrically connected to the current limiting unit 02.

[0066] Specifically, the anti-reverse module 5 may include anti-reverse diodes, which may include a first anti-reverse diode D1, a second anti-reverse diode D2, a third anti-reverse diode D3, and a fourth anti-reverse diode D4 respectively, corresponding to the first brightness adjustment submodule 311, the second brightness adjustment submodule 312, the third brightness adjustment submodule 313, and the fourth brightness adjustment submodule 314, so as to isolate reverse current through each anti-reverse diode. At the same time, the main control module 1 also includes m switch control terminals 13 corresponding one-to-one with m LED light sources 01, so that the cathode of the LED light source 01 can be electrically connected to the corresponding switch control terminal 13, and the anode of the LED light source 01 is electrically connected to the current limiting unit 02. Pins 1-4, 1-5, and 1-7 in U1 can be three switch control terminals 13, and pins 1-4, 1-5, and 1-7 are respectively electrically connected to the first LED light source 011, the second LED light source 012, and the third LED light source 013. At this time, the LED light source 01 can be configured with independent positive and negative lead pads, so that the opening and closing state of each LED light source 01 can be directly controlled by the switch control terminal 13. There is no need to set up m switch modules 4 to control the opening and closing state of each LED light source 01, which can further simplify the structure of the control circuit and reduce the manufacturing cost of the control circuit.

[0067] The anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the cathode is electrically connected to the current limiting unit 02. When the brightness adjustment signal output terminal 11 outputs a high level and the switch control terminal 13 outputs a low level, the anti-reverse diode will conduct in the forward direction. For example, when pins 1-16 of U1 output a high level and pins 1-4 output a low level, current will flow into the first LED light source 011 sequentially through the first anti-reverse diode D1 and the first resistor R11, so that the current flowing through the first LED light source 011 is I0. The anti-reverse diode can prevent reverse current interference, reduce the risk of failure, and at the same time ensure precise control of the current value flowing through each LED light source 01, improving the accuracy and safety of brightness level adjustment.

[0068] Optional, Figure 4 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention, as shown below. Figure 4As shown, the anti-reverse module 5 includes an anti-reverse diode; the anode of the LED light source 01 is electrically connected to the external power supply terminal, and the cathode of the LED light source 01 is electrically connected to the current limiting unit 02; the cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the anode of the anti-reverse diode is electrically connected to the current limiting unit 02.

[0069] Specifically, the anti-reverse module 5 may include anti-reverse diodes. These anti-reverse diodes may include a first anti-reverse diode D1, a second anti-reverse diode D2, a third anti-reverse diode D3, and a fourth anti-reverse diode D4, respectively, which are respectively configured to isolate reverse current through the first brightness adjustment submodule 311, the second brightness adjustment submodule 312, the third brightness adjustment submodule 313, and the fourth brightness adjustment submodule 314. Simultaneously, the anode of the LED light source 01 is electrically connected to the external power supply terminal, and the cathode of the LED light source 01 is electrically connected to the current limiting unit 02, meaning all LED light sources 01 are connected with a common anode. At this time, the cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the anode of the anti-reverse diode is electrically connected to the current limiting unit 02. When the brightness adjustment signal output terminal 11 outputs a low level, the anti-reverse diode will conduct in the forward direction. For example, when pins 1-16 of U1 output a low level, current will flow sequentially through the external power supply, each LED light source 01, the first brightness adjustment submodule 311, and the first anti-reverse diode D1 into the main control module 1, ensuring that the current flowing through each LED light source 01 is I0. The anti-reverse diode can prevent reverse current interference, reduce the risk of failure, and at the same time ensure precise control of the current value flowing through each LED light source 01, improving the accuracy and safety of brightness level adjustment.

[0070] Optional, Figure 5 This is a schematic diagram of another light source brightness level control circuit provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the anti-reverse module 5 includes an anti-reverse diode; the main control module 1 also includes m switch control terminals 13 corresponding one-to-one with the m LED light sources 01; the anode of the LED light source 01 is electrically connected to the switch control terminal 13, and the cathode of the LED light source 01 is electrically connected to the current limiting unit 02; the cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the anode of the anti-reverse diode is electrically connected to the current limiting unit 02.

[0071] Specifically, the anti-reverse module 5 may include anti-reverse diodes, which may include a first anti-reverse diode D1, a second anti-reverse diode D2, a third anti-reverse diode D3, and a fourth anti-reverse diode D4 respectively, corresponding to the first brightness adjustment submodule 311, the second brightness adjustment submodule 312, the third brightness adjustment submodule 313, and the fourth brightness adjustment submodule 314, so as to isolate reverse current through each anti-reverse diode. At the same time, the main control module 1 also includes m switch control terminals 13 corresponding one-to-one with m LED light sources 01, so that the anode of the LED light source 01 can be electrically connected to the corresponding switch control terminal 13, and the cathode of the LED light source 01 is electrically connected to the current limiting unit 02. Pins 1-4, 1-5, and 1-7 in U1 can be three switch control terminals 13, and pins 1-4, 1-5, and 1-7 are respectively electrically connected to the first LED light source 011, the second LED light source 012, and the third LED light source 013. At this time, the LED light source 01 can be configured with independent positive and negative lead pads, so that the opening and closing state of each LED light source 01 can be directly controlled by the switch control terminal 13. There is no need to set up m switch modules 4 to control the opening and closing state of each LED light source 01, which can further simplify the structure of the control circuit and reduce the manufacturing cost of the control circuit.

[0072] The cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal 11, and the anode is electrically connected to the current limiting unit 02. When the brightness adjustment signal output terminal 11 outputs a low level and the switch control terminal 13 outputs a high level, the anti-reverse diode will conduct in the forward direction. For example, when pins 1-16 of U1 output a low level and pins 1-4 output a high level, the current will flow back to the main control module 1 through the first LED light source 011, the first resistor R11, and the first anti-reverse diode D1 in sequence, so that the current flowing through the first LED light source 011 is I0. The anti-reverse diode can prevent reverse current interference, reduce the risk of failure, and at the same time ensure precise control of the current value flowing through each LED light source 01, improving the accuracy and safety of brightness level adjustment.

[0073] Optional, continue to refer to Figure 2 The light source brightness level control circuit also includes: a vibration sensing module 6; the vibration signal output terminal of the vibration sensing module 6 is electrically connected to the vibration signal input terminal of the main control module 1; the main control module 1 is also used to start adjusting the brightness level of each LED light source 01 according to the vibration signal provided by the vibration sensing module 6.

[0074] Specifically, the vibration sensing module 6 may include a vibration sensor M1, and the vibration signal output terminal of the vibration sensing module 6 is electrically connected to the vibration signal input terminal of the main control module 1, so that the vibration sensor M1 can provide a vibration signal to the main control module 1. For example, pins 1-2 of U1 can be the vibration signal input terminal of the main control module 1. The vibration sensor M1 is electrically connected to pins 1-2 of U1 through an RC oscillation circuit, so that when the vibration sensor M1 detects a vibration signal, such as when the inner red / green dot sight is picked up or moved, it generates a vibration signal, such as a high-level signal, and outputs it to the main control module 1. This allows the main control module 1 to adjust the brightness level of each LED light source 01 through the brightness adjustment signal output terminal 11 and adjust the on / off state of each LED light source through the switch signal output terminal 12 or the switch control terminal 13 after receiving the vibration signal. When the vibration sensor M1 does not detect a vibration signal, such as when the inner red / green dot sight is stationary, the vibration sensor M1 will output a low level or zero signal. At this time, the main control module 1 enters standby mode to reduce the power consumption of the control circuit and improve the flexibility and efficiency of brightness level adjustment.

[0075] Optional, continue to refer to Figure 2 The light source brightness level control circuit also includes: an interaction module 7; the level signal output terminal of the interaction module 7 is electrically connected to the level signal input terminal of the main control module 1; the main control module 1 is also used to adjust the brightness level of each LED light source 01 to the preset brightness level corresponding to the level signal according to the level signal provided by the interaction module 7.

[0076] Specifically, the interaction module 7 may include a first button SW1 and a second button SW2, and the gear position signal output terminal of the interaction module 7 is electrically connected to the gear position signal input terminal of the main control module 1, so that the first button SW1 and the second button SW2 can provide gear position signals to the main control module 1. For example, pins 1-9 and 1-10 of U2 can be the level signal input terminals of the main control module 1. The first button SW1 is electrically connected to pins 1-10 of U2, and the second button SW2 is electrically connected to pins 1-9 of U1, so that the user can select the brightness level and on / off state of each LED light source 01 by using the first button SW1 and the second button SW2 respectively. The first button SW1 and the second button SW2 can generate level signals and provide them to the main control module 1, so that the main control module 1 can adjust the output of each brightness adjustment signal output terminal 11 to output a high-level signal or a low-level signal according to the level signal, and can adjust the output of each switch signal output terminal 12 or each switch control terminal 13 to output a high-level signal or a low-level signal according to the level signal, so as to adjust the brightness level of each LED light source 01 to the preset brightness level corresponding to the level signal. Users can control the generation of patterns such as "dot", "cross" and "circle" in the inner red / green dot sight as needed through the interactive module 7, and can also control the brightness level of the generated aiming pattern as needed, so that the inner red / green dot sight can adapt to different ambient light conditions, such as strong light, weak light and night, improving the flexibility and stability of brightness level adjustment.

[0077] Optional, continue to refer to Figure 2 The light source brightness level control circuit also includes: a power supply module 8; the power supply module 8 is electrically connected to the main control module 1 and is used to supply power to the main control module 1.

[0078] Specifically, the power supply module 8 may include an external power supply device, such as an industrial power supply. Pins 1-3 of U1 can be the positive power supply port of the main control module 1, and pins 1-6 of U1 can be the negative power supply port of the main control module 1. The power supply module 8 can be electrically connected to pins 1-3 and pins 1-6 of U1 respectively, so that the power supply module 8 can provide a stable power supply to the main control module 1, ensuring the stable operation of each functional module in the light source brightness level control circuit and improving the performance and stability of the light source brightness level control circuit.

[0079] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this invention can be achieved, and this is not limited herein.

[0080] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A light source brightness level control circuit, characterized in that, include: Main control module, light source module, and light source brightness adjustment module; The light source module includes m LED light sources; m is a positive integer greater than or equal to 1; The light source brightness adjustment module includes n brightness adjustment sub-modules; each brightness adjustment sub-module includes m current limiting units; the main control module includes n brightness adjustment signal output terminals; n is a positive integer greater than or equal to 2; In the same brightness adjustment submodule, the first end of each current limiting unit is electrically connected to the same brightness adjustment signal output end, and the second end of each current limiting unit is electrically connected to each LED light source in a corresponding manner. The main control module is used to provide brightness adjustment control signals to each of the brightness adjustment sub-modules respectively; The brightness adjustment submodule is used to control the brightness level of the current signal provided to each of the LED light sources according to the brightness adjustment control signal.

2. The light source brightness level control circuit according to claim 1, characterized in that, The current limiting unit includes a current limiting resistor; The resistance values ​​of the current-limiting resistors in each of the brightness adjustment submodules electrically connected to the same LED light source are different.

3. The light source brightness level control circuit according to claim 2, characterized in that, The n brightness adjustment sub-modules are respectively the first brightness adjustment sub-module to the nth brightness adjustment sub-module; In each of the brightness adjustment sub-modules electrically connected to the same LED light source, the resistance value of the current limiting resistor in the i-th brightness adjustment sub-module is greater than the resistance value of the current limiting resistor in the (i+1)-th brightness adjustment sub-module. Where 1≤i≤n-1, and i is a positive integer.

4. The light source brightness level control circuit according to claim 1, characterized in that, Also includes: m switching modules corresponding one-to-one with each of the m LED light sources; The switching module is electrically connected between the current limiting unit and the LED light source; The main control module also includes m switch signal output terminals, each of which is electrically connected to a corresponding switch module; the main control module is also used to provide switch control signals to each switch module to control the on / off state of each LED light source.

5. The light source brightness level control circuit according to claim 4, characterized in that, The switching module includes transistors; The first terminal of the transistor is electrically connected to the current limiting unit, and the second terminal of the transistor is electrically connected to the LED light source; the gate of the transistor is electrically connected to the corresponding switch signal output terminal.

6. The light source brightness level control circuit according to claim 1, characterized in that, Also includes: Each of the n brightness adjustment sub-modules has an anti-reverse module; The anti-reverse module is electrically connected between the brightness adjustment signal output terminal and each current limiting unit of the same brightness adjustment submodule.

7. The light source brightness level control circuit according to claim 6, characterized in that, The anti-reverse module includes an anti-reverse diode; The cathode of the LED light source is grounded, and the anode of the LED light source is electrically connected to the current limiting unit; The anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the cathode of the anti-reverse diode is electrically connected to the current limiting unit.

8. The light source brightness level control circuit according to claim 6, characterized in that, The anti-reverse module includes an anti-reverse diode; the main control module also includes m switch control terminals corresponding one-to-one with each of the m LED light sources; The cathode of the LED light source is electrically connected to the switch control terminal, and the anode of the LED light source is electrically connected to the current limiting unit. The anode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the cathode of the anti-reverse diode is electrically connected to the current limiting unit.

9. The light source brightness level control circuit according to claim 6, characterized in that, The anti-reverse module includes an anti-reverse diode; The anode of the LED light source is electrically connected to an external power supply terminal, and the cathode of the LED light source is electrically connected to the current limiting unit. The cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the anode of the anti-reverse diode is electrically connected to the current limiting unit.

10. The light source brightness level control circuit according to claim 6, characterized in that, The anti-reverse module includes an anti-reverse diode; the main control module also includes m switch control terminals corresponding one-to-one with each of the m LED light sources; The anode of the LED light source is electrically connected to the switch control terminal, and the cathode of the LED light source is electrically connected to the current limiting unit. The cathode of the anti-reverse diode is electrically connected to the brightness adjustment signal output terminal, and the anode of the anti-reverse diode is electrically connected to the current limiting unit.

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