Vehicle-mounted LED lamp capable of automatically dimming along with external light

Abstract

The utility model discloses a vehicle-mounted LED lamp capable of automatically adjusting light along with external light. The vehicle-mounted LED lamp comprises a barrel-shaped structure shell, an LED light source, a plane mirror, an atmosphere lamp light-emitting plate and an adjusting mechanism. The atmosphere lamp light-emitting plate is arranged in the cylindrical structure shell and is close to the plane mirror, the atmosphere lamp light-emitting plate is of an annular structure, and light of the LED light source passes through an inner hole of the atmosphere lamp light-emitting plate. The adjusting mechanism comprises a convex lens assembly and a driving mechanism in driving connection with the convex lens assembly, and the linear distance between the convex lens assembly and the LED light source can be controlled through the driving mechanism. The vehicle-mounted LED lamp further comprises a driving circuit which automatically adjusts along with external light and controls the brightness of the LED light source. The vehicle-mounted LED lamp is arranged on the roof rack, the driving circuit capable of automatically adjusting light according to external light is added, ambient light can be sensed through the driving circuit, then the brightness of the LED light source is adjusted, requirements are met, and electricity can be saved.

Description

Technical Field

[0001] The utility model relates to an in-vehicle LED lamp, in particular to an in-vehicle LED lamp that automatically adjusts the light according to the external light. Background Art

[0002] In off-road vehicles, LED lamps are often installed on the roof luggage rack for lighting. The in-vehicle LED is installed on the roof bracket and is turned on for lighting when in use.

[0003] In the prior art, there are various structures of in-vehicle LED lamps installed on the roof luggage rack, such as downlights and spotlights. The utility model improves the existing spotlight. The existing spotlight does not have a dimming circuit. Especially in summer, the dusk stage is long and the ambient light gradually becomes darker over time. And during the preparation for camping during this period, in-vehicle LED is also required to provide lighting. If the in-vehicle LED lamp without a dimming circuit is directly used, the power consumption is large.

[0004] In the prior art, the lighting light of the in-vehicle LED lamp installed on the roof luggage rack is adjusted by changing the position of the reflector cup at the front end of the in-vehicle LED lamp. Although this adjustment method can adjust the light, it is easy to cause the loosening of the reflector cup, and when the off-road vehicle is moving, it is easy to make the reflector cup fall off.

[0005] Therefore, it is necessary to improve the in-vehicle LED lamp installed on the roof luggage rack in the prior art. Summary of the Utility Model

[0006] Aiming at the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an in-vehicle LED lamp that automatically adjusts the light according to the external light. The purpose of designing this in-vehicle LED lamp is: one is to add a drive circuit that automatically adjusts the light according to the external light, and the other is to add an adjustment mechanism to adjust the light.

[0007] To solve the above technical problems, the utility model is realized through the following solutions: An in-vehicle LED lamp that automatically adjusts the light according to the external light of the utility model includes a cylindrical structure housing, an LED light source arranged in the cylindrical structure housing, and a plane mirror arranged at the light-emitting end of the cylindrical structure housing. The in-vehicle LED lamp further includes:

[0008] An atmosphere lamp light-emitting plate arranged in the cylindrical structure housing and close to the plane mirror. The atmosphere lamp light-emitting plate is of a ring structure, and the inner hole thereof allows the light of the LED light source to pass through;

[0009] An adjustment mechanism, including a convex lens assembly and a drive mechanism that is drivingly connected to the convex lens assembly, and the linear distance between the convex lens assembly and the LED light source can be controlled through the drive mechanism;

[0010] The vehicle-mounted LED lamp further includes a driving circuit that automatically adjusts and controls the brightness of the LED light source according to the external light.

[0011] Further, the cylindrical structure housing includes a front housing with an inclined opening and a rear housing connected to the front housing. A waterproof structure is provided at the connection between the front housing and the rear housing. At the mouth end in the light-emitting direction of the rear housing, a first step and a second step are provided adjacent to each other. The first step is outside the second step.

[0012] Still further, the plane mirror is provided on the first step, the atmosphere lamp light-emitting plate is provided on the second step and fixed by a plurality of guide rods, and the convex lens assembly is sleeved on the plurality of guide rods in a linearly movable manner.

[0013] Still further, the convex lens assembly includes a bracket and a convex lens. The bracket is a circular ring structure, the convex lens is fixed at the circular hole of the bracket, and the bracket is sleeved on the plurality of guide rods and can move along the plurality of guide rods.

[0014] Still further, the rear housing has a receiving cavity and a guiding groove;

[0015] The driving mechanism includes:

[0016] A rotating handle, which is rotatably but immovably installed in the receiving cavity, and a convex column is provided on the outer wall of its cylinder and near the end of the cylinder;

[0017] A movable member, which has a column cavity for the cylinder of the rotating handle to enter, an obliquely running sliding hole provided on the outer wall surface, and a guiding strip provided on the outer wall surface. The convex column is limited within the area of the sliding hole, and the guiding strip is placed in the guiding groove;

[0018] A connecting rod, one end of which is fixed to the end of the movable member, and the other end of which is fixed to the bracket.

[0019] Further, the vehicle-mounted LED lamp further includes an angle adjustment mechanism, and the angle adjustment mechanism is connected to the cylindrical structure housing.

[0020] Further, the driving circuit includes a light sensing module U1 and a single-chip microcomputer U2 that automatically adjust the light-emitting brightness of the LED light source according to the external light;

[0021] The connection structure of each pin of the light sensing module U1 is:

[0022] Pin SCL-7 is connected to a resistor R3, and the other end of the resistor R3 is connected to the VDD circuit;

[0023] Pin PWM_SEG-6 is connected to a resistor R2, and the other end of the resistor R2 is connected to the VDD circuit;

[0024] The EN_LED SEG - 4 pin is connected to the PWM4 - 3 pin of the single - chip microcomputer U2;

[0025] The ZC SEG - 5 pin is connected to a resistor R6, and the other end of the resistor R6 is respectively connected to the CLKO - 2 pin of the single - chip microcomputer U2, a capacitor C6, the negative terminal of a voltage - regulating diode D1, a resistor R4, and a capacitor C5. The other ends of the capacitor C6, the voltage - regulating diode D1, the resistor R4, and the capacitor C5 are respectively grounded;

[0026] The GND - 9 pin is grounded;

[0027] The VREG - 3 pin is respectively connected to a capacitor C1 and a capacitor C2, and the other ends of the capacitor C1 and the capacitor C2 are respectively grounded;

[0028] The VDDHI - 8 pin is respectively connected to a capacitor C3 and a capacitor C4, the other ends of the capacitor C3 and the capacitor C4 are respectively grounded, and the VDDHI - 8 pin is also connected to the VDD circuit;

[0029] Between the VDD - 1 pin and the GND - 8 pin of the single - chip microcomputer U2, two parallel capacitors are connected. Among them, the GND - 8 pin of the single - chip microcomputer U2 is grounded. The PWM - 4 pin of the single - chip microcomputer U2 is connected to a resistor R1, and the other end of the resistor R1 is connected to the 3 - rd pin of the double - row socket P1. The 5 - th pin of the double - row socket P1 is connected to a resistor R10, and the other end of the resistor R10 is connected to the PWM3 - 5 pin of the single - chip microcomputer U2. The 6 - th pin of the double - row socket P1 is connected to the positive electrode of a diode D2, and the negative electrode of the diode D2 is connected to a resistor R9. The other end of the resistor R9 is connected to the VDD circuit and the negative electrode of a voltage - regulating diode D3, and the positive terminal of the voltage - regulating diode D3 is grounded. The PA0 - 7 pin of the single - chip microcomputer U2 is connected to a resistor R7, and the other end of the resistor R7 is connected to the ZC_SEG - 5 pin of the light - sensing module U1. The PA1 - 6 pin of the single - chip microcomputer U2 is connected to a resistor R8, and the other end of the resistor R8 is connected to the PWM_SEG - 6 pin of the light - sensing module U1.

[0030] Compared with the prior art, the beneficial effects of the present utility model are:

[0031] 1. The on - vehicle LED lamp of the present utility model is arranged on the roof luggage rack, and it adds a driving circuit for automatically adjusting the light according to the external light. Through this driving circuit, the ambient light can be sensed, and then the brightness of the LED light source can be adjusted to meet the requirements, thereby saving electricity.

[0032] 2. The on-vehicle LED lamp of the present utility model is provided with an adjusting mechanism to adjust the light. By changing the position of the convex lens, the outgoing light of the LED light source is changed. Moreover, the manual adjustment position of the adjusting mechanism of the present utility model is set at the tail of the cylindrical structure shell, and it will not become loose due to the movement of the off-road vehicle. Description of the Drawings

[0033] Figure 1 It is an exploded view of the on-vehicle LED lamp of the present utility model.

[0034] Figure 2 It is a cross-sectional view of the on-vehicle LED lamp of the present utility model.

[0035] Figure 3 It is a structural diagram of the adjusting mechanism of the present utility model.

[0036] Figures 4 - 8 After the circuit connections are made, the overall driving circuit diagram of the present utility model is formed.

[0037] Reference numerals in the drawings: rotating handle 1, movable part 2, connecting rod 3, rear shell 4, bracket 5, atmosphere lamp light-emitting plate 6, guide rod 7, plane mirror 8, front shell 9, L-shaped bracket 10, chuck 11, connecting part 12, LED light source 13, convex lens 14, convex column 101, sliding hole 201, guiding strip 202. Detailed Embodiment

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0039] Embodiment 1: The specific structure of the present utility model is as follows:

[0040] Please refer to the attached Figures 1 - 8 , An on-vehicle LED lamp that automatically adjusts the light according to the external light of the present utility model includes a cylindrical structure shell, an LED light source 13 provided in the cylindrical structure shell, and a plane mirror 8 provided at the light-emitting end of the cylindrical structure shell. The cylindrical structure shell includes a front shell 9 with an inclined opening and a rear shell 4 connected to the front shell 9. A waterproof structure is provided at the connection between the front shell 9 and the rear shell 4. At the mouth end in the light-emitting direction of the rear shell 4, a first step and a second step are provided adjacent to each other, and the first step is outside the second step. The waterproof structure is to provide a sealing ring at the connection between the front shell 9 and the rear shell 4. The outer end of the front shell 9 is an inclined opening structure, and its inner end is buckled to the rear shell 4.

[0041] The vehicle-mounted LED lamp further includes an atmosphere lamp light-emitting panel 6 and an adjusting mechanism.

[0042] The atmosphere lamp light-emitting panel 6 is arranged inside the cylindrical structure housing and close to the plane mirror 8. The atmosphere lamp light-emitting panel 6 is of an annular structure, and the inner hole thereof allows the light of the LED light source 13 to pass through. The atmosphere lamp light-emitting panel 6 is provided with an RGB three-color LED patch array. By controlling the RGB three-color LED patches, gorgeous colored light can be emitted. When lighting is not required during camping, the atmosphere lamp light-emitting panel 6 can be turned on, and the atmosphere lamp light-emitting panel 6 emits dazzling light, such as stage lights, to create an atmosphere.

[0043] The rear shell 4 has a receiving cavity and a guiding groove.

[0044] The adjusting mechanism includes a convex lens assembly and a driving mechanism for driving and connecting the convex lens assembly. By means of this driving mechanism, the linear distance between the convex lens assembly and the LED light source 13 can be controlled; the plane mirror 8 is arranged on the first step, the atmosphere lamp light-emitting panel 6 is arranged on the second step and fixed by a plurality of guide rods 7, and the convex lens assembly is sleeved on the plurality of guide rods 7 in a linearly movable manner. Specifically, four guide rods 7 of the present utility model are provided, and the four guide rods 7 are distributed in a rectangular shape on the rear shell 4. The convex lens assembly includes a bracket 5 and a convex lens 14. The bracket 5 is of a circular ring structure, the convex lens 14 is fixed at the circular hole of the bracket 5, and the bracket 5 is sleeved on the plurality of guide rods 7 and can move along the plurality of guide rods 7. The bracket 5 is provided with four through holes, and the four through holes are respectively sleeved on the 4 guide rods 7, and the bracket 5 can move linearly along the 4 guide rods 7.

[0045] Since the LED light source 13 is fixed inside the rear shell 4 and is a fixed light source, the convex lens 14 moves with the bracket 5. By changing the position of the convex lens 14, the outgoing light rays can be changed. Therefore, a driving mechanism is provided in the rear shell 4.

[0046] The driving mechanism includes:

[0047] A rotating handle 1, which is rotatably but non-displaceably installed in the receiving cavity. A convex column 101 is arranged at a position close to the end of the outer wall of its cylinder; a sealing ring is also provided between the rotating handle 1 and the rear shell 4 to form a waterproof structure, and the outside of the rotating handle 1 is a handle;

[0048] A movable member 2, which has a column cavity for the cylinder of the rotating handle 1 to enter, an obliquely running sliding hole 201 arranged on the outer wall surface, and a guiding strip 202 arranged on the outer wall surface. The convex column 101 is limited within the area of the sliding hole 201, and the guiding strip 202 is placed in the guiding groove;

[0049] A connecting rod 3, one end of which is fixed to the end of the movable member 2, and the other end of which is fixed to the bracket 5.

[0050] Operating mode of the driving mechanism: As Figure 1 shown, rotate the rotary handle 1 counterclockwise, the convex column 101 rotates to the left, and the convex column 101 has a forward acting force on the sliding hole 201, and this acting force makes the moving part 2 move forward.

[0051] One end of the connecting rod 3 moves forward together with the moving part 2, the other end of the moving part 2 drives the bracket 5 to move forward, and further makes the convex lens 14 move forward. Since the position of the LED light source 13 is fixed and the position of the convex lens 14 changes, the light is changed accordingly.

[0052] Conversely, rotate the rotary handle 1 clockwise, and the convex lens 14 moves towards the direction of the LED light source 13.

[0053] Embodiment 2:

[0054] The vehicle-mounted LED lamp further includes an angle adjustment mechanism, and this angle adjustment mechanism is connected to the cylindrical structure housing. As Figure 1 and Figure 2 shown, the angle adjustment mechanism includes an L-shaped bracket 10, a chuck 11, and a connecting member 12. The outer side of the first plate surface of the L-shaped bracket 10 is fixed to the rear housing 4, and the inner side of its second plate surface is provided with first convex teeth distributed in a circular array. The chuck 11 is connected to the second plate surface of the L-shaped bracket 10 through bolts and nuts. The chuck 11 has second convex teeth distributed in a circular array on the surface opposite to the second plate surface, and the first convex teeth and the second convex teeth are engaged. By rotating the L-shaped bracket 10, the angle of the vehicle-mounted LED lamp can be changed. The connecting member 12 is installed on the column part of the chuck 11, and this connecting member 12 is fixed to the roof luggage rack.

[0055] Embodiment 3:

[0056] The vehicle-mounted LED lamp further includes a drive circuit that automatically adjusts and controls the brightness of the LED light source 13 according to the external light. The drive circuit includes a light sensing module U1 and a single-chip microcomputer U2 that automatically adjust the light emission brightness of the LED light source according to the external light;

[0057] The connection structure of each pin of the light sensing module U1 is:

[0058] The SCL-7 pin is connected with a resistor R3, and the other end of the resistor R3 is connected to the VDD circuit;

[0059] The PWM_SEG-6 pin is connected with a resistor R2, and the other end of the resistor R2 is connected to the VDD circuit;

[0060] The EN_LED SEG-4 pin is connected to the PWM4-3 pin of the single-chip microcomputer U2;

[0061] The 5th pin of ZC SEG is connected to a resistor R6, and the other end of the resistor R6 is respectively connected to the CLKO-2 pin of the single-chip microcomputer U2, a capacitor C6, the negative terminal of a voltage-regulator diode D1, a resistor R4, and a capacitor C5. The other ends of the capacitor C6, the voltage-regulator diode D1, the resistor R4, and the capacitor C5 are respectively grounded;

[0062] The 9th pin of GND is grounded;

[0063] The 3rd pin of VREG is respectively connected to a capacitor C1 and a capacitor C2, and the other ends of the capacitor C1 and the capacitor C2 are respectively grounded;

[0064] The 8th pin of VDDHI is respectively connected to a capacitor C3 and a capacitor C4, the other ends of the capacitor C3 and the capacitor C4 are respectively grounded, and the 8th pin of VDDHI is also connected to the VDD circuit;

[0065] Two parallel capacitors are connected between the VDD-1 pin and the GND-8 pin of the single-chip microcomputer U2. Among them, the GND-8 pin of the single-chip microcomputer U2 is grounded. The PWM-4 pin of the single-chip microcomputer U2 is connected to a resistor R1, and the other end of the resistor R1 is connected to the 3rd pin of the double-row socket P1. The 5th pin of the double-row socket P1 is connected to a resistor R10, and the other end of the resistor R10 is connected to the PWM3-5 pin of the single-chip microcomputer U2. The 6th pin of the double-row socket P1 is connected to the positive electrode of a diode D2, and the negative electrode of the diode D2 is connected to a resistor R9. The other end of the resistor R9 is connected to the VDD circuit and the negative electrode of a voltage-regulator diode D3. The positive electrode of the voltage-regulator diode D3 is grounded. The PA0-7 pin of the single-chip microcomputer U2 is connected to a resistor R7, and the other end of the resistor R7 is connected to the ZC_SEG-5 pin of the light-sensing module U1. The PA1-6 pin of the single-chip microcomputer U2 is connected to a resistor R8, and the other end of the resistor R8 is connected to the PWM_SEG-6 pin of the light-sensing module U1.

[0066] The PA1-6 pin of the single-chip microcomputer U2 is connected to the 3rd pin of the single-row socket P2, and its PA0-7 pin is connected to the 2nd pin of the single-row socket P2. The 1st pin of the single-row socket P2 is connected to the VDD circuit, and its 4th pin is grounded.

[0067] The light-sensing module U1 of the present utility model is a photosensitive chip of the IQS813-OLGA model. It senses the ambient light and darkness level through a light probe. The single-chip microcomputer U2 is provided with a dimming protocol. It cooperates with the light-sensing module U1 to process the optical signal, and judges the power that the LED light source 13 should receive. Furthermore, the light-sensing module U1 controls the voltage output of the LED lamp group, so that the LED light source 13 emits light with appropriate brightness according to the ambient light.

[0068] In summary, the on-vehicle LED lamp of the present utility model is arranged on the roof luggage rack, and it is provided with a driving circuit for automatically adjusting the light according to the external light. Through this driving circuit, the ambient light can be sensed, and then the brightness of the LED light source can be adjusted to meet the requirements, thereby saving electricity. The on-vehicle LED lamp of the present utility model is added with an adjusting mechanism to adjust the light. By changing the position of the convex lens, the outgoing light of the LED light source can be changed, and the manual adjustment position of the adjusting mechanism of the present utility model is arranged at the tail of the cylindrical structure shell, and it will not be loosened due to the movement of the off-road vehicle.

[0069] The above is only the preferred embodiment of the present utility model, and it does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A vehicle-mounted LED lamp that automatically adjusts its brightness according to external light, comprising a cylindrical structure shell, an LED light source (13) arranged in the cylindrical structure shell, and a plane mirror (8) arranged at the light-emitting end of the cylindrical structure shell, characterized in that: The vehicle-mounted LED lamp also includes: An ambient light emitting panel (6) is arranged in the cylindrical structure shell and close to the plane mirror (8), the ambient light emitting panel (6) being an annular structure, and an inner hole of which is used for light from the LED light source (13) to pass through; An adjustment mechanism, comprising a convex lens assembly and a driving mechanism driving the convex lens assembly, wherein the linear distance between the convex lens assembly and the LED light source (13) can be controlled by the driving mechanism; The vehicle-mounted LED lamp also includes a driving circuit which automatically adjusts and controls the brightness of the LED light source (13) according to external light.

2. The vehicle-mounted LED lamp that automatically adjusts its brightness according to external light according to claim 1, characterized in that: The cylindrical structural shell comprises a front shell (9) with an oblique opening and a rear shell (4) connected to the front shell (9); a waterproof structure is provided at the connection between the front shell (9) and the rear shell (4); and a first step and a second step are respectively provided adjacent to each other at the opening end in the light emitting direction of the rear shell (4), and the first step is outside the outer side of the second step.

3. The vehicle-mounted LED lamp that automatically adjusts light according to external light according to claim 2, characterized in that: The plane mirror (8) is arranged on the first step, the atmosphere light emitting panel (6) is arranged on the second step and is fixed by a plurality of guide rods (7), and the convex lens assembly can be sleeved on the plurality of guide rods (7) in a linearly movable manner.

4. The vehicle-mounted LED lamp that automatically adjusts light according to external light according to claim 3, characterized in that: The convex lens assembly comprises a bracket (5) and a convex lens (14); the bracket (5) is a circular ring structure; the convex lens (14) is fixed to a circular hole of the bracket (5); and the bracket (5) is sleeved on a plurality of guide rods (7) and can move along the plurality of guide rods (7).

5. The vehicle-mounted LED lamp that automatically adjusts light according to external light according to claim 4, characterized in that: The rear shell (4) has a receiving cavity and a guide groove; The driving mechanism comprises: A rotating handle (1), which is installed in the receiving cavity in a rotatable manner but does not change its position, and a protruding column (101) is provided on the outer wall of the cylinder near the end of the cylinder; A movable part (2), the movable part (2) comprising a column cavity for the cylindrical portion of the rotary handle (1) to enter, an oblique sliding hole (201) provided on the outer wall surface, and a guide strip (202) provided on the outer wall surface, the convex column (101) being confined within the region of the sliding hole (201), and the guide strip (202) being disposed within the guide groove; A connecting rod (3) has one end fixed to the end of the movable member (2) and the other end fixed to the bracket (5).

6. The vehicle-mounted LED lamp that automatically adjusts brightness according to external light according to claim 1, characterized in that: The vehicle-mounted LED lamp further comprises an angle adjustment mechanism, which is connected to the cylindrical structural shell.

7. The vehicle-mounted LED lamp that automatically adjusts brightness according to external light according to claim 1, characterized in that: The driving circuit includes a light sensing module U1 and a single chip microcomputer U2 which automatically adjust the brightness of the LED light source according to the external light; The pin connection structure of the light sensing module U1 is: The SCL-7 pin is connected to a resistor R3, and the other end of the resistor R3 is connected to a VDD circuit; The PWM_SEG-6 pin is connected to a resistor R2, and the other end of the resistor R2 is connected to the VDD circuit; The EN_LED SEG-4 pin is connected to the PWM4-3 pin of the microcontroller U2; The ZC SEG-5 pin is connected to a resistor R6, the other end of the resistor R6 is respectively connected to the CLKO-2 pin of the single chip computer U2, a capacitor C6, the negative end of a voltage zener diode D1, a resistor R4 and a capacitor C5, and the other ends of the capacitor C6, the voltage zener diode D1, the resistor R4 and the capacitor C5 are respectively grounded; GND-9 pin is grounded; The VREG-3 pin is connected to a capacitor C1 and a capacitor C2 respectively, and the other ends of the capacitor C1 and the capacitor C2 are grounded respectively; The VDDHI-8 pin is connected to capacitor C3 and capacitor C4 respectively, the other ends of the capacitor C3 and capacitor C4 are grounded respectively, and the VDDHI-8 pin is also connected to the VDD circuit; Two parallel capacitors are connected between the VDD-1 pin and the GND-8 pin of the single-chip microcomputer U2, wherein the GND-8 pin of the single-chip microcomputer U2 is grounded, the PWM-4 pin of the single-chip microcomputer U2 is connected to a resistor R1, the other end of the resistor R1 is connected to the 3rd pin of the double-row socket P1, the 5th pin of the double-row socket P1 is connected to a resistor R10, the other end of the resistor R10 is connected to the PWM3-5 pin of the single-chip microcomputer U2, the 6th pin of the double-row socket P1 is connected to the The positive electrode of the diode D2 is connected to a resistor R9, the other end of the resistor R9 is connected to the VDD circuit and the negative electrode of a voltage-stabilizing diode D3, the positive end of the voltage-stabilizing diode D3 is grounded, the PA0-7 pin of the single-chip microcomputer U2 is connected to a resistor R7, the other end of the resistor R7 is connected to the ZC_SEG-5 pin of the light sensing module U1, the PA1-6 pin of the single-chip microcomputer U2 is connected to a resistor R8, and the other end of the resistor R8 is connected to the PWM_SEG-6 pin of the light sensing module U1.

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