Brightness control device, control method thereof and vehicle

Abstract

The invention discloses a brightness control device and method and a vehicle, and relates to the technical field of brightness control devices.The brightness control device comprises a control assembly and a linear constant-current chip, the linear constant-current chip comprises a first resistor, a second resistor and a third resistor, and the first resistor, the second resistor and the third resistor are connected with the control assembly; the first resistor, the second resistor and the third resistor are respectively connected with the rear combined lamp group, the rear combined lamp group is electrically connected with a power supply anode of a vehicle, and the control assembly is electrically connected with a power supply cathode of the vehicle; when the tail gate is closed, the first resistor is electrically connected with the control assembly; when the tail gate is opened, the first resistor and the second resistor are electrically connected with the control assembly. When the vehicle is braked, the first resistor, the second resistor and the third resistor are all electrically connected with the control assembly. Through the opening and closing condition of the tail door and the braking condition of the vehicle, the rear combined lamp set generates different brightness changes, so that the rear vehicle is reminded, and danger is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of brightness control devices, and particularly to a brightness control device, a control method thereof, and a vehicle. Background Art

[0002] In a vehicle lighting system, as an important safety component, the rear taillight not only needs to provide a basic lighting function, but also needs to transmit clear warning signals in scenarios such as braking and tailgate operation. The rear taillight must comply with the following two regulations: "GB5920-2019 Photometric Characteristics of Front and Rear Position Lamps, Clearance Lamps and Stop Lamps for Motor Vehicles and Trailers" and "GB 4785-2019 Installation Regulations for External Lighting and Light Signalling Devices of Motor Vehicles and Trailers". These two regulations stipulate the photometric requirements. In order to meet the visual effect, there are proportional requirements for brightness. When the vehicle is produced, in order to meet the styling, there are requirements for the area and shape of the rear taillight. These factors affect each other.

[0003] The brightness of existing rear taillights is usually a fixed value and cannot be dynamically adjusted according to the vehicle state. For example, when the tailgate is opened, the rear through lamp is set on the tailgate, and the rear through lamp will not play a lighting role. In this case, the brightness of the rear combination lamp group needs to be higher to play a warning role. However, the traditional rear combination lamp group still maintains the normal brightness, resulting in insufficient lighting effect and thus prone to danger. When braking, there is no brightness change in the rear through lamp and the rear combination lamp group, and the vehicle behind cannot know the braking situation of the vehicle in front, which is also prone to danger.

[0004] Therefore, it is necessary to provide a new brightness control device, a control method thereof, and a vehicle to solve the above technical problems. Summary of the Invention

[0005] The main object of the present invention is to propose a brightness control device, a control method thereof, and a vehicle, aiming to improve the technical problem that the fixed brightness of the rear taillight of an automobile in the prior art is prone to danger.

[0006] To achieve the above object, according to one aspect of the present invention, the present invention proposes a brightness control device for controlling the brightness of the rear taillight of a vehicle. The rear taillight includes a rear combination lamp group and a rear through lamp. The rear combination lamp group includes a left rear combination lamp and a right rear combination lamp. Both the left rear combination lamp and the right rear combination lamp are used to be set at the rear of the vehicle, and the rear through lamp is used to be set on the tailgate of the vehicle. The brightness control device includes:

[0007] A control component;

[0008] Linear constant current chip, the linear constant current chip includes a first resistor, a second resistor and a third resistor, the first resistor, the second resistor and the third resistor are respectively connected to the control component, the first resistor, the second resistor and the third resistor are respectively connected to the rear combination lamp group, the rear combination lamp group is used for electrically connecting to the positive pole of the vehicle power supply, and the control component is used for electrically connecting to the negative pole of the vehicle power supply;

[0009] The brightness control device has at least a first working state, a second working state and a third working state:

[0010] When the tailgate is closed, the brightness control device is in the first working state, and the first resistor is electrically connected to the control component;

[0011] When the tailgate is opened, the brightness control device is in the second working state, and both the first resistor and the second resistor are electrically connected to the control component;

[0012] When the vehicle is braking, the brightness control device is in the third working state, and the first resistor, the second resistor and the third resistor are all electrically connected to the control component.

[0013] In one embodiment, the brightness control device further includes a first induction sensor, the first induction sensor is signal-connected to the control component, and the first induction sensor is used to detect whether the tailgate is opened.

[0014] In one embodiment, the control component further includes a signal switch, a zone controller and a logic switch, the zone controller is respectively signal-connected to the first induction sensor and the logic switch, the zone controller is used to send high and low levels, and the logic switch is signal-connected to the signal switch.

[0015] In one embodiment, the brightness control device further includes a second induction sensor, the second induction sensor is signal-connected to the signal switch, and the second induction sensor is used to detect whether the vehicle is braking.

[0016] In one embodiment, the signal switch includes a first contact, a second contact, a third contact and a common contact, the common contact is used for electrically connecting to the negative pole of the vehicle power supply, the first contact is connected to the first resistor, the second contact is connected to the second resistor, and the third contact is connected to the third resistor;

[0017] When the brightness control device is in the first working state, the common contact is electrically connected to the first contact;

[0018] When the brightness control device is in the second working state, the total contact is electrically connected to the first contact and the second contact respectively;

[0019] When the brightness control device is in the third working state, the total contact is electrically connected to the first contact, the second contact and the third contact respectively.

[0020] In one embodiment, the brightness control device further includes a switch circuit, and the switch circuit is used to be connected in series between the rear combination lamp group and the power supply of the vehicle.

[0021] In one embodiment, the signal switch is a three-way relay.

[0022] According to another aspect of the present invention, the present invention further provides a brightness control method, which is applied to the brightness control device as described above, and the brightness control method includes the following steps:

[0023] Obtain the current state of the tailgate;

[0024] If the tailgate is in the closed state, control the first resistor to be electrically connected to the negative electrode of the power supply of the vehicle; if the tailgate is in the open state, control the first resistor and the second resistor to be electrically connected to the negative electrode of the power supply of the vehicle respectively;

[0025] Obtain the braking state of the vehicle;

[0026] If the vehicle is in the braking state, control the first resistor, the second resistor and the third resistor to be electrically connected to the negative electrode of the power supply of the vehicle respectively.

[0027] According to another aspect of the present invention, the present invention further provides a vehicle, including a taillight, a tailgate, a housing and the brightness control device as described above, the tailgate is rotatably installed on the housing, the taillight includes a rear combination lamp group and a rear through lamp, the rear combination lamp group includes a left rear combination lamp and a right rear combination lamp, both the left rear combination lamp and the right rear combination lamp are used to be arranged at the rear of the vehicle, the rear through lamp is used to be arranged on the tailgate of the vehicle, and the brightness control device is electrically connected to the rear combination lamp group.

[0028] In one embodiment, a plurality of LEDs with equal numbers are arranged in both the left rear combination lamp, the right rear combination lamp and the rear through lamp.

[0029] In the above solution, the brightness control device is used for controlling the brightness of the taillights of a vehicle. The taillights include a rear combination lamp group and a rear through lamp. The rear combination lamp group includes a left rear combination lamp and a right rear combination lamp. Both the left rear combination lamp and the right rear combination lamp are used to be arranged at the rear of the vehicle. The rear through lamp is used to be arranged on the tailgate of the vehicle. The brightness control device includes a control component and a linear constant current chip. The linear constant current chip includes a first resistor, a second resistor, and a third resistor. The first resistor, the second resistor, and the third resistor are respectively connected to the control component. The first resistor, the second resistor, and the third resistor are respectively connected to the rear combination lamp group. The rear combination lamp group is used to be electrically connected to the positive pole of the vehicle power supply. The control component is used to be electrically connected to the negative pole of the vehicle power supply. The brightness control device has at least a first working state, a second working state, and a third working state: when the tailgate is closed, the brightness control device is in the first working state, and the first resistor is electrically connected to the control component; when the tailgate is opened, the brightness control device is in the second working state, and both the first resistor and the second resistor are electrically connected to the control component; when the vehicle is braking, the brightness control device is in the third working state, and the first resistor, the second resistor, and the third resistor are all electrically connected to the control component.When the vehicle is in normal operation, the tailgate is closed. At this time, the first resistor is electrically connected to the negative pole of the vehicle's power supply. The rear combination lamp group includes a left rear combination lamp and a right rear combination lamp. The left rear combination lamp and the right rear combination lamp are respectively electrically connected to the first resistor. In this way, the negative pole of the vehicle's power supply, the control component, the first resistor, the left rear combination lamp, the right rear combination lamp, and the positive pole of the vehicle's power supply form a powered circuit. In this way, the left rear combination lamp and the right rear combination lamp will emit light, and at this time, the brightness of the left rear combination lamp and the brightness of the right rear combination lamp are both the same as the brightness of the rear through lamp, the brightness meets the regulatory requirements, and it can remind the following vehicles; when the tailgate is opened, the rear through lamp on the tailgate rises with the tailgate. At this time, the light emitted by the rear through lamp cannot be seen behind the vehicle. In order to be able to remind the following vehicles, at this time, the first resistor and the second resistor are respectively electrically connected to the negative pole of the vehicle's power supply. In this way, the negative pole of the vehicle's power supply, the control component, the first resistor, the second resistor, the left rear combination lamp, the right rear combination lamp, and the positive pole of the vehicle's power supply form a powered circuit. In this way, the left rear combination lamp and the right rear combination lamp will emit light. Among them, the first resistor and the second resistor are in parallel. Since the first resistor and the second resistor are in parallel, the total resistance value decreases, and the voltage value of the vehicle's power supply does not change. In this way, the current of the entire circuit will increase. In this way, the brightness of the left rear combination lamp and the right rear combination lamp will increase, so that the brightness of the left rear combination lamp and the right rear combination lamp meets the regulatory requirements and can remind the following vehicles; when the vehicle brakes, in order to remind the following vehicles, it is necessary to further increase the brightness of the rear combination lamp group. At this time, the first resistor, the second resistor, and the third resistor are respectively electrically connected to the negative pole of the vehicle's power supply. In this way, the negative pole of the vehicle's power supply, the control component, the first resistor, the second resistor, the third resistor, the left rear combination lamp, the right rear combination lamp, and the positive pole of the vehicle's power supply form a powered circuit. In this way, the left rear combination lamp and the right rear combination lamp will emit light. Among them, the first resistor, the second resistor, and the third resistor are in parallel. Since the first resistor, the second resistor, and the third resistor are in parallel, the total resistance value further decreases, and the voltage value of the vehicle's power supply does not change. In this way, the current of the entire circuit will further increase. In this way, the brightness of the left rear combination lamp and the right rear combination lamp will further increase. In this way, when braking, there will be an obvious brightness change in the left rear combination lamp and the right rear combination lamp, which can remind the following vehicles that the vehicle is braking, so as to avoid danger; through such a structure, the rear combination lamp group can generate different brightness changes according to the opening and closing of the tailgate and the braking of the vehicle, so as to remind the following vehicles and avoid danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0031] Figure 1 Schematic diagram of the overall structure of an embodiment of the brightness control device provided by the present invention;

[0032] Figure 2 Schematic circuit diagram of an embodiment of the brightness control device provided by the present invention;

[0033] Figure 3 Schematic signal diagram of an embodiment of the brightness control device provided by the present invention;

[0034] Figure 4 Schematic circuit signal diagram of an embodiment of the brightness control device provided by the present invention;

[0035] Figure 5 Schematic diagram of the structure of an embodiment of the taillight provided by the present invention;

[0036] Figure 6 Schematic flowchart of the brightness control method according to the first embodiment of the present invention.

[0037] Explanation of the reference numerals in the drawings:

[0038] 100, brightness control device; 101, power supply; 102, taillight; 103, rear combination lamp group; 103a, left rear combination lamp; 103b, right rear combination lamp; 104, rear through lamp; 1, control component; 11, signal switch; 111, first contact; 112, second contact; 113, third contact; 114, main contact; 12, area controller; 13, logic switch; 2, linear constant current chip; 21, first resistor; 22, second resistor; 23, third resistor; 3, first induction sensor; 4, second induction sensor; 5, switch circuit.

[0039] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if the embodiments of the present invention involve descriptions such as "first" and "second", the descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] To achieve the above object, according to one aspect of the present invention, please refer to Figures 1 to 4, the present invention provides a brightness control device 100 for controlling the brightness of the taillights 102 of a vehicle. The taillights 102 include a rear combination lamp group 103 and a rear through lamp 104. The rear combination lamp group 103 includes a left rear combination lamp 103a and a right rear combination lamp 103b. Both the left rear combination lamp 103a and the right rear combination lamp 103b are used to be arranged at the rear of the vehicle. The rear through lamp 104 is used to be arranged on the tailgate of the vehicle. The brightness control device 100 includes a control component 1 and a linear constant current chip 2. The linear constant current chip 2 includes a first resistor 21, a second resistor 22, and a third resistor 23. The first resistor 21, the second resistor 22, and the third resistor 23 are respectively connected to the control component 1, and the first resistor 21, the second resistor 22, and the third resistor 23 are respectively connected to the rear combination lamp group 103. The rear combination lamp group 103 is used to be electrically connected to the positive pole of the vehicle power supply 101, and the control component 1 is used to be electrically connected to the negative pole of the vehicle power supply 101; The brightness control device 100 has at least a first working state, a second working state, and a third working state: when the tailgate is closed, the brightness control device 100 is in the first working state, and the first resistor 21 is electrically connected to the control component 1; when the tailgate is opened, the brightness control device 100 is in the second working state, and both the first resistor 21 and the second resistor 22 are electrically connected to the control component 1; when the vehicle is braking, the brightness control device 100 is in the third working state, and the first resistor 21, the second resistor 22, and the third resistor 23 are all electrically connected to the control component 1. When the vehicle is in a normal running state, the tailgate is closed. At this time, the first resistor 21 is electrically connected to the negative pole of the vehicle power supply 101. The rear combination lamp group 103 includes a left rear combination lamp 103a and a right rear combination lamp 103b. The left rear combination lamp 103a and the right rear combination lamp 103b are respectively electrically connected to the first resistor 21. In this way, the negative pole of the vehicle power supply 101, the control component 1, the first resistor 21, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive pole of the vehicle power supply 101 form an energized circuit. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light, and at this time, the brightness of the left rear combination lamp 103a and the brightness of the right rear combination lamp 103b are both the same as the brightness of the rear through lamp 104. The brightness meets the regulatory requirements and can remind the following vehicles;When the tailgate is opened, the rear through lamp 104 on the tailgate rises with the tailgate. At this time, the light emitted by the rear through lamp 104 cannot be seen behind the vehicle. In order to be able to remind the vehicles behind, at this time, the first resistor 21 and the second resistor 22 are respectively electrically connected to the negative pole of the vehicle power supply 101. In this way, the negative pole of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the left rear combination lamp 103a, the right rear combination lamp 103b and the positive pole of the vehicle power supply 101 form an energized circuit. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Among them, the first resistor 21 and the second resistor 22 are connected in parallel. Since the first resistor 21 and the second resistor 22 are connected in parallel, the total resistance value decreases, and the voltage value of the vehicle power supply 101 will not change. In this way, the current of the entire circuit will increase, and the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will increase, so that the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b meets the regulatory requirements and can remind the vehicles behind; when the vehicle brakes, in order to remind the vehicles behind, it is necessary to further increase the brightness of the rear combination lamp group 103. At this time, the first resistor 21, the second resistor 22 and the third resistor 23 are respectively electrically connected to the negative pole of the vehicle power supply 101. In this way, the negative pole of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the third resistor 23, the left rear combination lamp 103a, the right rear combination lamp 103b and the positive pole of the vehicle power supply 101 form an energized circuit. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Among them, the first resistor 21, the second resistor 22 and the third resistor 23 are connected in parallel. Since the first resistor 21, the second resistor 22 and the third resistor 23 are connected in parallel, the total resistance value is further reduced, and the voltage value of the vehicle power supply 101 will not change. In this way, the current of the entire circuit will further increase, and the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will further increase. In this way, when braking, there will be an obvious brightness change in the left rear combination lamp 103a and the right rear combination lamp 103b, which can remind the vehicles behind that the vehicle is braking, so as to avoid danger; through such a structure, the rear combination lamp group 103 can generate different brightness changes according to the opening and closing of the tailgate and the braking of the vehicle, so as to remind the vehicles behind and avoid danger.

[0044] Please refer to Figure 3 and Figure 4, in one embodiment, the brightness control device 100 further includes a first induction sensor 3. The first induction sensor 3 is signal-connected to the control component 1 and is used to detect whether the tailgate is opened. When the tailgate is opened, the position of the rear through lamp 104 rises, which may exceed the line of sight of the driver behind, thus affecting the warning effect on the vehicles behind. By using the first induction sensor 3 to detect the state of the tailgate, when the first induction sensor detects that the tailgate is opened, the first induction sensor 3 transmits a signal to the control component 1. At this time, the control component 1 electrically connects the first resistor 21 and the second resistor 22 to the negative pole of the vehicle power supply 101 respectively. In this way, a powered circuit is formed by the negative pole of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the left rear combination lamp 103a, the right rear combination lamp 103b and the positive pole of the vehicle power supply 101. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Among them, for the first resistor 21 and the second resistor 22, since the first resistor 21 and the second resistor 22 are in parallel, the total resistance value decreases. In this way, the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will increase, so that the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b meets the regulatory requirements and can remind the vehicles behind, reducing the risk of traffic accidents. Through the first induction sensor 3, the system can automatically adjust the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b according to the opening and closing state of the tailgate without manual intervention. This intelligent design makes the vehicle's lighting system more flexible and efficient, and can self-adjust according to the actual situation to meet different needs. The automation function improves the convenience and comfort of vehicle use. Users do not need to worry about the problem of insufficient brightness of the taillight 102 due to the change of the tailgate state, and the system will automatically make the best adjustment, enhancing the user's driving experience.

[0045] Please refer to Figure 3 and Figure 4, in one embodiment, the control component 1 further includes a signal switch 11, a zone controller 12, and a logic switch 13. The zone controller 12 is respectively signal-connected to the first induction sensor 3 and the logic switch 13. The zone controller 12 is used to send high and low levels, and the logic switch 13 is signal-connected to the signal switch 11. When the tailgate is closed and the first induction sensor 3 does not sense the opening of the tailgate, the zone controller 12 will send a low level to the logic switch 13. The logic switch 13 controls the signal switch 11 to be connected, so that the first resistor 21 is electrically connected to the negative electrode of the vehicle power supply 101. The left rear combination lamp 103a and the right rear combination lamp 103b are respectively electrically connected to the first resistor 21. In this way, the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101 form a powered circuit. Thus, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light, and at this time, the brightness of the left rear combination lamp 103a and the brightness of the right rear combination lamp 103b are both the same as the brightness of the rear through lamp 104, the brightness meets the regulatory requirements, and it can remind the following vehicles; when the tailgate is opened, the first induction sensor 3 detects the opening of the tailgate, and the first induction sensor 3 transmits the signal to the zone controller 12. The zone controller 12 emits a high level, and the logic switch 13 receives the high level and controls the signal switch 11 to be connected, so that the first resistor 21 and the second resistor 22 are respectively electrically connected to the negative electrode of the vehicle power supply 101. In this way, the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101 form a powered circuit. Thus, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Since the first resistor 21 and the second resistor 22 are in parallel, the total resistance value decreases, so that the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will increase, making the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b meet the regulatory requirements, and it can remind the following vehicles, reducing the risk of traffic accidents. By sending high and low level signals by the zone controller 12 to control the working state of the brightness adjustment device, the brightness of the vehicle tail lamp 102 can be accurately adjusted. Different level signals correspond to different working modes, ensuring the most appropriate lighting intensity in various situations. The presence of the logic switch 13 allows the system to make more complex decisions according to different input conditions, such as adjusting the brightness of the rear combination lamp group 103 in combination with the opening and closing state of the tailgate. This not only helps to improve the visibility of the vehicle itself but also better reminds other road users of the state change of the vehicle, thereby reducing the occurrence of traffic accidents. The design scheme of adopting the signal switch 11, the zone controller 12, and the logic switch 13 provides higher flexibility and scalability for the system.

[0046] Further, the first induction sensor 3 may be a Hall sensor or a micro switch;

[0047] Please refer to Figure 3 and Figure 4 In one embodiment, the brightness control device 100 further includes a second induction sensor 4. The second induction sensor 4 is signal-connected to the signal switch 11 and is used to detect whether the vehicle is braking. When the vehicle brakes, the second induction sensor 4 detects the vehicle braking, and the second induction sensor 4 transmits a signal to the signal switch 11. At this time, the signal switch 11 electrically connects the first resistor 21, the second resistor 22, and the third resistor 23 to the negative electrode of the vehicle power supply 101 respectively. In this way, the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the third resistor 23, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101 form a powered circuit. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Among them, the first resistor 21, the second resistor 22, and the third resistor 23 are connected in parallel. Since the first resistor 21, the second resistor 22, and the third resistor 23 are connected in parallel, the total resistance is further reduced, and the voltage value of the vehicle power supply 101 does not change. In this way, the current of the entire circuit will further increase, and the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will further increase. In this way, when braking, there will be an obvious brightness change in the left rear combination lamp 103a and the right rear combination lamp 103b, which can remind the following vehicle that the vehicle is braking, thus avoiding danger. When the vehicle brakes, a timely and obvious brightness change can more effectively remind the driver of the following vehicle, thereby reducing the risk of rear-end collisions. By accurately detecting the braking state through the second induction sensor 4 and correspondingly adjusting the brightness of the taillight 102, it can ensure sufficient warning effect in case of emergency. The second induction sensor 4 can monitor the braking situation of the vehicle in real time and quickly transmit information to the signal switch 11, thereby triggering the corresponding brightness adjustment mechanism. This rapid response mechanism can enhance the brightness of the taillight 102 in the first time and provide an immediate warning for the following vehicle. Combining the first induction sensor 3 and the second induction sensor 4, the brightness control device 100 can achieve more precise brightness adjustment according to the specific situation of the vehicle. Whether the tailgate is closed, opened, or the vehicle is braking, the system can automatically adjust to the optimal brightness setting to meet the regulatory requirements and ensure driving safety.

[0048] Furthermore, the second induction sensor 4 can be a brake pedal position sensor or a brake light circuit signal;

[0049] Please refer to Figure 2 and Figure 4, in one embodiment, the signal switch 11 includes a first contact 111, a second contact 112, a third contact 113, and a common contact 114. The common contact 114 is used for electrically connecting to the negative electrode of the vehicle power supply 101. The first contact 111 is connected to the first resistor 21, the second contact 112 is connected to the second resistor 22, and the third contact 113 is connected to the third resistor 23;

[0050] When the brightness control device 100 is in the first working state, the common contact 114 is electrically connected to the first contact 111;

[0051] When the brightness control device 100 is in the second working state, the common contact 114 is electrically connected to the first contact 111 and the second contact 112 respectively;

[0052] When the brightness control device 100 is in the third working state, the main contact 114 is electrically connected to the first contact 111, the second contact 112, and the third contact 113 respectively. When the tailgate is closed, the first induction sensor 3 does not sense that the tailgate is opened. At this time, the area controller 12 will send a low level to the logic switch 13. The logic switch 13 controls the main contact 114 of the signal switch 11 to be electrically connected to the first contact 111. In this way, the first resistor 21 is electrically connected to the negative electrode of the vehicle power supply 101. The left rear combination lamp 103a and the right rear combination lamp 103b are respectively electrically connected to the first resistor 21. In this way, the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101 form an energized circuit. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. And at this time, the brightness of the left rear combination lamp 103a and the brightness of the right rear combination lamp 103b are both the same as the brightness of the rear through lamp 104. The brightness meets the regulatory requirements and can remind the following vehicles. When the tailgate is opened, the position of the rear through lamp 104 rises, which may exceed the line of sight of the driver behind, thus affecting the warning effect on the following vehicles. At this time, the first induction sensor 3 detects that the tailgate is opened. The first induction sensor 3 transmits the signal to the area controller 12. The area controller 12 sends a high level. The logic switch 13 receives the high level and controls the main contact 114 of the signal switch 11 to be electrically connected to the first contact 111 and the second contact 112 respectively. In this way, the first resistor 21 and the second resistor 22 are respectively electrically connected to the negative electrode of the vehicle power supply 101. In this way, the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101 form an energized circuit. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Since the first resistor 21 and the second resistor 22 are in parallel, the total resistance value decreases. In this way, the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will increase. In this way, it can remind the following vehicles by increasing the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b, reducing the risk of traffic accidents;When the vehicle brakes, the second induction sensor 4 detects the vehicle braking. The second induction sensor 4 transmits a signal to the signal switch 11. At this time, the main contact 114 of the signal switch 11 is electrically connected to the first contact 111, the second contact 112, and the third contact 113 respectively. In this way, the first resistor 21, the second resistor 22, and the third resistor 23 are respectively electrically connected to the negative pole of the vehicle power supply 101. Thus, the negative pole of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the third resistor 23, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive pole of the vehicle power supply 101 form a powered circuit. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Among them, the first resistor 21, the second resistor 22, and the third resistor 23 are connected in parallel. Since the first resistor 21, the second resistor 22, and the third resistor 23 are connected in parallel, the total resistance is further reduced. And the voltage value of the vehicle power supply 101 does not change. In this way, the current of the entire circuit will further increase. In this way, the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will further increase. In this way, when braking, there will be an obvious brightness change in the left rear combination lamp 103a and the right rear combination lamp 103b, which can remind the following vehicle that the vehicle is braking, thus avoiding danger. By different contact combinations, that is, the main contact 114 is electrically connected to the first, second, or third contact 113, the brightness of the rear combination lamp group 103 can be flexibly adjusted. This design can provide appropriate brightness according to the actual situation to ensure the best visibility and safety. By using the contact switching mechanism of the signal switch 11, the access situation of the resistor can be dynamically adjusted without changing the circuit structure, thereby changing the magnitude of the current flowing through the rear combination lamp group 103. This method avoids complex circuit design and possible fault points, simplifies the overall architecture of the system, and is also convenient for maintenance and upgrade.

[0053] Please refer to Figure 2 and Figure 4 , in an embodiment, the brightness control device 100 further includes a switch circuit 5. The switch circuit 5 is used to be connected in series between the rear combination lamp group 103 and the vehicle power supply 101. By setting the switch circuit 5, the voltage of the entire circuit system can be reduced from 12V to 6.5V. Reducing the voltage helps to reduce power consumption, especially more obvious when using LED lamps. Since the efficiency of LED lamps is relatively high, when the working voltage is appropriately reduced, sufficient brightness can still be maintained while reducing unnecessary energy waste.

[0054] In one embodiment, the signal switch 11 is a three-way relay. A three-way relay is a mechanical switch device with a relatively simple structure and a mature and reliable working principle. Compared with complex electronic switches or solid-state switches, the three-way relay has stronger anti-interference ability and stability in the automotive environment. Especially in complex working conditions such as vibration and temperature changes, it can operate stably for a long time. The three-way relay can switch different contact connection methods by controlling the on / off of the control coil. This flexibility enables the system to dynamically adjust the brightness of the rear combination lamp group 103 according to the vehicle state, thereby meeting the lighting requirements in different scenarios.

[0055] According to another aspect of the present invention, please refer to Figure 6 , Figure 6 FIG. is a schematic flowchart of the brightness control method for the first embodiment. The present invention also provides a brightness control method. The brightness control method is applied to the brightness control device 100 as described above. The brightness control method includes the following steps:

[0056] S1. Obtain the current state of the tailgate;

[0057] The switch state of the tailgate is detected by the first induction sensor 3, and then the first induction sensor 3 transmits the signal to the area controller 12. The area controller 12 issues a high level or a low level according to the switch state of the tailgate.

[0058] S2. If the tailgate is in the closed state, control the first resistor 21 to be electrically connected to the negative electrode of the vehicle power supply 101; if the tailgate is in the open state, control the first resistor 21 and the second resistor 22 to be respectively electrically connected to the negative electrode of the vehicle power supply 101

[0059] When the tailgate is in the closed state, the first induction sensor 3 transmits a signal to the area controller 12. The area controller 12 issues a low level. The logic switch 13 receives the low level and controls the main contact 114 of the signal switch 11 to be electrically connected to the first contact 111. In this way, the first resistor 21 is electrically connected to the negative electrode of the vehicle power supply 101. The left rear combination lamp 103a and the right rear combination lamp 103b are respectively electrically connected to the first resistor 21. Thus, a power-on circuit is formed by the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light, and at this time, the brightness of the left rear combination lamp 103a and the brightness of the right rear combination lamp 103b are both the same as the brightness of the rear through lamp 104, meeting the regulatory requirements and being able to alert the following vehicles. When the tailgate is in the open state, the position of the rear through lamp 104 rises, which may exceed the line of sight of the following driver, thus affecting the warning effect on the following vehicles. At this time, the first induction sensor 3 detects that the tailgate is open. The first induction sensor 3 transmits a signal to the area controller 12. The area controller 12 issues a high level. The logic switch 13 receives the high level and controls the main contact 114 of the signal switch 11 to be electrically connected to the first contact 111 and the second contact 112 respectively. In this way, the first resistor 21 and the second resistor 22 are respectively electrically connected to the negative electrode of the vehicle power supply 101. Thus, a power-on circuit is formed by the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101. In this way, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Since the first resistor 21 and the second resistor 22 are in parallel, the total resistance value decreases. In this way, the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will increase. In this way, it is possible to alert the following vehicles by increasing the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b, reducing the risk of traffic accidents.

[0060] S3. Obtain the braking state of the vehicle;

[0061] Detect the braking state of the vehicle through the second induction sensor 4, and then the second induction sensor 4 transmits a signal to the signal switch 11.

[0062] S4. If the vehicle is in the braking state, control the first resistor 21, the second resistor 22, and the third resistor 23 to be respectively electrically connected to the negative electrode of the vehicle power supply 101;

[0063] When the second induction sensor 4 detects that the vehicle is braking, the second induction sensor 4 transmits a braking signal to the signal switch 11. In this way, the main contact 114 of the signal switch 11 is electrically connected to the first contact 111, the second contact 112, and the third contact 113 respectively. Thus, the first resistor 21, the second resistor 22, and the third resistor 23 are respectively electrically connected to the negative electrode of the vehicle power supply 101. In this way, the negative electrode of the vehicle power supply 101, the control component 1, the first resistor 21, the second resistor 22, the third resistor 23, the left rear combination lamp 103a, the right rear combination lamp 103b, and the positive electrode of the vehicle power supply 101 form an energized circuit. Thus, the left rear combination lamp 103a and the right rear combination lamp 103b will emit light. Among them, the first resistor 21, the second resistor 22, and the third resistor 23 are connected in parallel. Since the first resistor 21, the second resistor 22, and the third resistor 23 are connected in parallel, the total resistance value is further reduced compared with the resistance value of a single resistor, and the voltage value of the vehicle power supply 101 does not change. In this way, the current of the entire circuit will further increase, and the brightness of the left rear combination lamp 103a and the right rear combination lamp 103b will increase. Thus, when braking, there will be an obvious brightness change in the left rear combination lamp 103a and the right rear combination lamp 103b, which can remind the following vehicle that the vehicle is braking, and thus can avoid danger.

[0064] In the above embodiments of the present invention, by sensing the opening and closing of the induction tailgate and the braking situation of the vehicle, the resistance in the circuit is automatically switched, so that the rear combination lamp group 103 can generate different brightness changes, thereby reminding the following vehicle and avoiding danger.

[0065] According to another aspect of the present invention, please refer to Figure 5 , the present invention also provides a vehicle, including a taillight 102, a tailgate, a housing, and the above-mentioned brightness control device 100. The tailgate is rotatably installed on the housing. The taillight 102 includes a rear combination lamp group 103 and a rear through lamp 104. The rear combination lamp group 103 includes a left rear combination lamp 103a and a right rear combination lamp 103b. The left rear combination lamp 103a and the right rear combination lamp 103b are both used to be arranged at the rear of the vehicle. The rear through lamp 104 is used to be arranged on the tailgate of the vehicle. The brightness control device 100 is electrically connected to the rear combination lamp group 103. Since the vehicle includes all the implementation manners of all the above embodiments of the brightness control device 100, it has at least all the beneficial effects brought by all the above implementation manners, which will not be elaborated one by one here.

[0066] In one embodiment, a plurality of LEDs with equal numbers are provided in each of the left rear combination lamp 103a, the right rear combination lamp 103b, and the rear through lamp 104. By setting this structure, the consistency of the brightness of each lamp under the passing current is ensured.

[0067] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A brightness control device for controlling the brightness of the taillights of a vehicle, the taillights including a rear combination lamp group and a rear through lamp, the rear combination lamp group including a left rear combination lamp and a right rear combination lamp, both the left rear combination lamp and the right rear combination lamp being configured to be disposed at the rear of the vehicle, and the rear through lamp being configured to be disposed on the tailgate of the vehicle, characterized in that, Including: A control component; A linear constant current chip, which includes a first resistor, a second resistor, and a third resistor. The first resistor, the second resistor, and the third resistor are respectively connected to the control component, and the first resistor, the second resistor, and the third resistor are respectively connected to the rear combination lamp group. The rear combination lamp group is used to be electrically connected to the positive pole of the vehicle power supply, and the control component is used to be electrically connected to the negative pole of the vehicle power supply; The brightness control device has at least a first working state, a second working state, and a third working state: When the tailgate is closed, the brightness control device is in the first working state, and the first resistor is electrically connected to the control component; When the tailgate is opened, the brightness control device is in the second working state, and both the first resistor and the second resistor are electrically connected to the control component; When the vehicle is braking, the brightness control device is in the third working state, and the first resistor, the second resistor, and the third resistor are all electrically connected to the control component.

2. The brightness control device according to claim 1, wherein, The brightness control device further includes a first induction sensor, which is signal-connected to the control component, and the first induction sensor is used to detect whether the tailgate is opened.

3. The brightness control device according to claim 2, characterized in that, The control component further includes a signal switch, a zone controller, and a logic switch. The zone controller is respectively signal-connected to the first induction sensor and the logic switch. The zone controller is used to send high and low levels, and the logic switch is signal-connected to the signal switch.

4. The brightness control device according to claim 3, wherein The brightness control device further includes a second induction sensor, which is signal-connected to the signal switch, and the second induction sensor is used to detect whether the vehicle is braking.

5. The brightness control device according to claim 4, characterized in that, The signal switch includes a first contact, a second contact, a third contact, and a common contact. The common contact is used to be electrically connected to the negative pole of the vehicle power supply. The first contact is connected to the first resistor, the second contact is connected to the second resistor, and the third contact is connected to the third resistor; When the brightness control device is in the first working state, the common contact is electrically connected to the first contact; When the brightness control device is in the second working state, the common contact is respectively electrically connected to the first contact and the second contact; When the brightness control device is in the third working state, the common contact is respectively electrically connected to the first contact, the second contact, and the third contact.

6. The brightness control device according to any one of claims 1 to 5, characterized in that, The brightness control device further includes a switch circuit, which is used to be connected in series between the rear combination lamp group and the vehicle power supply.

7. The brightness control device according to claim 3, wherein The signal switch is a three-way relay.

8. A brightness control method, which is applied to the brightness control device according to any one of claims 1 to 7 above, characterized in that, The brightness control method includes the following steps: Obtain the current state of the tailgate; If the tailgate is in the closed state, control the first resistor to be electrically connected to the negative pole of the vehicle power supply; if the tailgate is in the open state, control the first resistor and the second resistor to be respectively electrically connected to the negative pole of the vehicle power supply; Obtain the braking state of the vehicle; If the vehicle is in a braking state, control the first resistor, the second resistor, and the third resistor to be electrically connected to the negative electrode of the vehicle's power supply respectively.

9. A vehicle, characterized in that, It includes a taillight, a tailgate, a housing, and the brightness control device according to any one of claims 1 to 7 above. The tailgate is rotatably installed on the housing. The taillight includes a rear combination lamp group and a rear through lamp. The rear combination lamp group includes a left rear combination lamp and a right rear combination lamp. Both the left rear combination lamp and the right rear combination lamp are used to be arranged at the rear of the vehicle. The rear through lamp is used to be arranged on the tailgate of the vehicle. The brightness control device is electrically connected to the rear combination lamp group.

10. The vehicle according to claim 9, characterized in that, A plurality of LEDs with equal numbers are provided in both the left rear combination lamp, the right rear combination lamp, and the rear through lamp.

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