Vehicle-mounted make-up mirror light supplementing device

Abstract

The utility model discloses a vehicle-mounted make-up mirror light supplement device, belonging to the vehicle-mounted make-up mirror field, the vehicle-mounted make-up mirror light supplement device comprises a PCB acquisition board, a first light guide plate and a control chip, the first light guide plate is located on the front side of the PCB acquisition board, the PCB acquisition board is provided with at least one touch control sheet, and the control chip is arranged on the PCB acquisition board. The first light guide plate covers at least one touch control piece, the control chip is located on the back face of the PCB collection board, and at least one touch control piece is electrically connected with the control chip. The vehicle-mounted make-up mirror light supplementing device can independently generate acquisition signals processed by the chip, and can effectively prevent the acquisition signals from being interfered during transmission and prevent the situation that the acquisition circuit is easy to touch by mistake.

Description

Technical Field

[0001] This utility model relates to the field of car cosmetic mirrors, and in particular to a car cosmetic mirror supplementary lighting device. Background Technology

[0002] Car vanity mirrors are a common accessory in passenger cars. To adapt to different usage environments, they are usually equipped with supplemental lighting to enhance brightness and prevent them from being unusable in low-light conditions. To control the switching and brightness adjustment of the supplemental lighting, one or more touch-sensitive pads are typically installed on the mirror. These pads are electrically connected to the main control PCB board via a flexible PCB. Since the PCB board for vanity mirrors only contains copper plates for electrical conduction, it's difficult to install a dedicated sensor chip. Typically, the back of the vanity mirror lens has a metal layer, and the PCB board is located on one side of this metal layer. Because an electromagnetic field is formed between the metal layer and the PCB board, sometimes even without touching the touch-sensitive pads, simply placing a hand on or around the PCB board can cause the supplemental lighting to turn on, off, or adjust its brightness. This indicates weak anti-interference capability during the touch signal transmission process, making accidental touches likely.

[0003] Chinese patent document CN210809698U discloses a touch-sensitive LED-illuminated makeup mirror, including a main body and an illuminated makeup mirror main body that can be inserted into and detached from the main body. The illuminated makeup mirror main body, from bottom to top, includes: a mirror for makeup application, a light guide plate, and a top cover with an insertable ring at the bottom that connects to the upper part of the main body. A touch switch is provided on the lower surface of the mirror, and a circuit board, a lithium battery, and a wire with a USB interface are disposed between the upper surface of the mirror and the lower surface of the light guide plate. In the prior art, a touch switch is usually provided on the lower surface of the mirror, and the signal from the touch switch is then transmitted to the main control board. However, this signal transmission is easily interfered with. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a car-mounted makeup mirror supplementary lighting device that can independently generate the acquisition signal after chip processing, which can effectively avoid interference during the transmission of the acquisition signal and prevent the acquisition circuit from being easily touched accidentally.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model discloses a car-mounted makeup mirror supplementary lighting device, including a PCB acquisition board, a first light guide plate, and a control chip. The first light guide plate is located on the front of the PCB acquisition board, and at least one touch pad is provided on the PCB acquisition board. The first light guide plate covers at least one of the touch pads. The control chip is located on the back of the PCB acquisition board, and at least one of the touch pads is electrically connected to the control chip.

[0007] A further technical solution of this utility model is that it also includes a chip auxiliary circuit, which is electrically connected to the control chip and is located on the back of the PCB acquisition board.

[0008] A further technical solution of this utility model is that at least one LED bead is provided at the edge of the first light guide plate, and at least one of the LED beads is fixed on the front side of the PCB acquisition board.

[0009] A further technical solution of this utility model is that a light tooth layer is provided on the first light guide plate.

[0010] A further technical solution of this utility model is that at least one positioning hole is provided on the first light guide plate.

[0011] A further technical solution of this utility model is that it also includes a sponge pad, which is located on the back of the PCB acquisition board.

[0012] A further technical solution of this utility model is that the sponge pad is configured as a U-shaped pad, and the U-shaped pad is located at the edge of the back of the PCB acquisition board;

[0013] A further technical solution of this utility model is that the U-shaped pad has a receiving opening, and the acquisition chip and the chip auxiliary circuit are located inside the receiving opening.

[0014] A further technical solution of this utility model is that the control chip is configured as a data acquisition chip, and also includes a main control PCB board and at least one supplementary light board. The main control PCB board is provided with a main control chip without touch recognition. The PCB data acquisition board is electrically connected to the main control PCB board, and at least one supplementary light board is electrically connected to the main control PCB board.

[0015] A further technical solution of this utility model is that the control chip is configured as a main control chip with touch recognition, and also includes a driving PCB board and at least one supplementary light board. The driving PCB board is electrically connected to the control chip of the PCB acquisition board, and at least one supplementary light board is electrically connected to the driving PCB board.

[0016] A further technical solution of this utility model is that a second light guide plate is provided on the supplementary light plate, and the second light guide plate is integrally formed with the first light guide plate.

[0017] The beneficial effects of this utility model are as follows:

[0018] The in-vehicle vanity mirror supplementary lighting device provided by this utility model eliminates the PCB flexible board that acts as a conductor in the prior art. Instead, an independent acquisition chip is set on the PCB acquisition board. The acquisition chip can collect and digitize the analog signal of at least one touch pad and then transmit it to the main control PCB board. This effectively reduces the problem of interference in the transmission of the analog signal collected by the touch pad, thereby improving the accuracy and stability of the touch device. In addition, a positioning hole is provided on the first light guide plate. The front or back of the first light guide plate can be distinguished through at least one positioning hole to prevent incorrect installation of the first light guide plate. Attached Figure Description

[0019] Figure 1 This is a perspective view of the in-vehicle makeup mirror supplementary lighting device provided in Embodiment 1 of this patent;

[0020] Figure 2 This is a perspective view of the touch controller provided in Embodiment 1 of this patent;

[0021] Figure 3 This is a top view of the PCB acquisition board provided in Embodiment 1 of this patent;

[0022] Figure 4 This is a top view of the first light guide plate provided in Embodiment 1 of this patent;

[0023] Figure 5 This is a perspective view of the in-vehicle makeup mirror supplementary lighting device provided in Embodiment 2 of this patent;

[0024] Figure 6 This is a front view of the in-vehicle makeup mirror supplementary lighting device provided in Embodiment 2 of this patent;

[0025] Figure 7 This is a perspective view of the in-vehicle vanity mirror provided in a specific embodiment of this patent.

[0026] In the picture:

[0027] 2. Main control PCB board; 11. PCB acquisition board; 111. Acquisition chip; 112. Touch panel; 12. Sponge pad; 13. Receiving port; 14. First light guide plate; 15. Lamp bead; 141. Light tooth layer; 142. Positioning hole; 113. Wire interface; 3. Enamelled wire; 4. Fill light board; 143. Slot; 5. Outer glass; 6. Touch button; 7. Driver PCB board; 41. Second light guide plate. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figures 1 to 7 As shown, the in-vehicle makeup mirror supplementary lighting device provided in this embodiment includes a PCB acquisition board 11, a first light guide plate 14, and a control chip. The PCB acquisition board 11, the first light guide plate 14, and the control chip constitute a touch controller 1. The touch controller 1 is a separate component, usually set separately from the main control PCB board 2 mentioned below. The PCB acquisition board 11 is used to acquire touch signals, and the first light guide plate 14 is used to make the touch pad 112 on the PCB acquisition board 11 illuminate, so that the user can quickly find the touch button 6 on the outer glass 5. The control chip is used to process the touch signal of the touch pad 112, so that the supplementary lighting board 4 responds according to the touch signal. The control chip can be configured as an acquisition chip 111 or a main control chip with touch recognition. When it is an acquisition chip 111, it can receive... The touch signal from the touch pad 112 is converted into a digital signal that can be recognized by the main control PCB board 2. When it is a main control chip with touch recognition, it directly generates a control signal to control the usage state of the supplementary light board 4. The first light guide plate 14 is located on the front of the PCB acquisition board 11 and is fixed on the PCB acquisition board 11. At least one touch pad 112 is provided on the PCB acquisition board 11. The touch pad 112 is used to sense the user's touch behavior. The first light guide plate 14 covers at least one touch pad 112, usually two touch pads 112. The two touch pads 112 correspond to two touch buttons 6 on the outer glass 5. One button is used to adjust the brightness, and the other button is used to adjust the color temperature. The control chip is located on the back of the PCB acquisition board 11, and at least one touch pad 112 is electrically connected to the control chip. The touch pad 112 defines an effective touch area. After receiving the user's touch in this effective area, a touch signal is generated. When the user's touch deviates from this effective area, no touch signal is generated. The PCB acquisition board 11 can be a rigid board or a flexible board. More preferably, the PCB acquisition board 11 is a rigid board. When the PCB acquisition board 11 is a rigid board, it has a supporting function, which is more conducive to the installation of the control chip and facilitates the fixed connection with the first light guide plate 14 and the sponge pad 12 mentioned below. More importantly, the independent setting of the control chip means that the car makeup mirror supplementary light device provided in this embodiment can eliminate the wire-type PCB flexible board in the prior art and use the PCB acquisition board 11. An independent control chip is set on the PCB acquisition board 11. The control chip can digitize the analog signal generated by at least one touch pad 112, so that the touch signal transmitted to the main control PCB board 2 has stronger anti-interference ability and avoids interference from the metal layer of the outer glass 5 being touched.

[0031] To ensure the control chip performs well, the in-vehicle makeup mirror supplementary lighting device provided in this embodiment further includes a chip auxiliary circuit. The chip auxiliary circuit typically includes a power management circuit, a reset circuit, and a clock circuit. The chip auxiliary circuit is electrically connected to the control chip and is located on the back of the PCB acquisition board 11 to support the operation of the control chip.

[0032] Since the first light guide plate 14 is usually set on the front side of the PCB acquisition board 11, in order to prevent the control chip from occupying the space on the front side, preferably, the control chip is located on the back side of the PCB acquisition board 11, so that the size of the PCB acquisition board 11 is almost the same as that of the first light guide plate 14. In order to make the first light guide plate 14 adhere tightly to the back side of the outer glass 5, and to make the two touch pads 112 correspond to the two touch buttons 6, so that there is no light leakage when the illuminated touch buttons 6 are seen, the car-mounted makeup mirror supplementary lighting device provided in this embodiment further includes a sponge pad 12. The sponge pad 12 is located on the back side of the PCB acquisition board 11. The sponge pad 12 is elastic, so that the first light guide plate 1 adheres tightly to the back side of the makeup mirror. It is theoretically feasible to set a whole sponge pad 12 on the back side of the PCB acquisition board 11, but since the control chip and chip auxiliary circuit are already set on the back side of the PCB acquisition board 11. To accommodate the control chip and its auxiliary circuitry, the sponge pad 12 is preferably configured as a U-shaped pad located at the edge of the back side of the PCB acquisition board 11. The U-shaped pad has a receiving opening 13, within which the acquisition chip 111 and its auxiliary circuitry are located. This achieves the goal of accommodating the acquisition chip 111 and its auxiliary circuitry while reducing the area of ​​the PCB acquisition board 11, thus fully utilizing the space on the back side of the PCB acquisition board 11. To avoid the thickness of the control chip affecting the elastic support effect of the sponge pad 12, the thickness of the U-shaped pad is preferably greater than the thickness of the control chip, ensuring that the sponge pad 12 can effectively provide elastic support.

[0033] To ensure that the two touch buttons 6 are illuminated when viewed from the front of the outer glass 5 of the lens, thus facilitating user identification, the first light guide plate 14 is further made transparent. At least one LED bead 15 is disposed at the edge of the first light guide plate 14, and this LED bead 15 is fixed to the front of the PCB acquisition board 11, such that it is located within a groove 143 on one side of the first light guide plate 14. When the LED bead 15 is illuminated, the light guided by the first light guide plate 14 typically becomes softer and more uniform. More preferably, the first light guide plate 14 is provided with a light-tooth layer 141, located on one side of the touch panel 112. The light-tooth layer 141 enables the LED bead 15 to emit light with better diffused light. Since the first light guide plate 14 is transparent, it is not easy to observe whether the light tooth layer 141 is located on the front or the back. More preferably, the first light guide plate 14 is provided with at least one positioning hole 142. When the positioning hole 142 corresponds to a mark on the PCB acquisition board 11 or corresponds to a corner of the PCB acquisition board 11, it is considered that the installation position of the first light guide plate 14 is correct. In fact, it can be reasonably set according to the product assembly requirements and convenience. The positioning hole 142 can be a round hole, a triangular hole, etc. The positioning hole 142 helps to ensure that the first light guide plate 14 is correctly installed during installation.

[0034] The in-vehicle vanity mirror supplementary lighting device provided in this embodiment also includes a main control PCB board 2 and at least one supplementary lighting board 4. The at least one supplementary lighting board 4 is controlled by the main control PCB board 2. In this case, the control chip is only used for touch signal acquisition. The control chip is configured as an acquisition chip 111, which forwards the touch signal from the touch pad 112 to a digital signal easily received by the main control PCB board 2. This signal has better anti-interference capabilities during transmission. The main control PCB board 2 is equipped with a main control chip without touch recognition. The main control chip is mainly used to send instructions to the supplementary lighting board 4 to adjust brightness and color temperature. The PCB acquisition board 11 is electrically connected to the main control PCB board 2, and at least one supplementary lighting board 4 is also electrically connected to the main control PCB board 2. After the control chip on the PCB acquisition board 11 acquires the touch signal, it converts the touch signal into a highly anti-interference digital signal and transmits it to the main control PCB board 2. The main control PCB board 2 issues execution instructions based on the touch signal, and the execution instructions are implemented through the driving circuit of the supplementary lighting board 4 to achieve the purpose of changing the brightness and color temperature. More preferably, a wire interface 113 is provided at the front edge of the PCB acquisition board 11, and the wire interface 113 is electrically connected to the main control PCB board 2 via enameled wire 3. Replacing the existing wire-type flexible PCB board used for signal transmission with multiple enameled wires 3 reduces the likelihood of forming a large electromagnetic field between the enameled wires 3 and the metal layer inside the outer glass 5, further reducing the probability of accidental touches. Furthermore, product testing shows that the in-vehicle vanity mirror supplementary lighting device provided in this application has never experienced an accidental touch in 1000 touch tests.

[0035] Example 2

[0036] like Figure 5 and Figure 6 As shown, the in-vehicle makeup mirror supplementary lighting device provided in this embodiment includes a PCB acquisition board 11, a first light guide plate 14, and a control chip. The first light guide plate 14 is located on the front of the PCB acquisition board 11, and at least one touch pad 112 is disposed on the PCB acquisition board 11. The first light guide plate 14 covers at least one touch pad 112. The control chip is located on the back of the PCB acquisition board 11, and at least one touch pad 112 is electrically connected to the control chip. The difference between Embodiment 2 and Embodiment 1 is that:

[0037] The control chip is configured as a main control chip with touch recognition. The in-vehicle vanity mirror supplementary lighting device provided in this embodiment also includes a driver PCB board 7 and at least one supplementary light board 4. The input terminal of the driver PCB board 7 is electrically connected to the control chip of the PCB acquisition board 11, and the driver PCB board 7 is controlled by the control chip of the PCB acquisition board 11. At least one supplementary light board 4 is electrically connected to the output terminal of the driver PCB board 7, and at least one supplementary light board 4 is electrically connected to the driver PCB board. After receiving the execution command from the main control chip, the driver PCB board 7 will change the brightness and color temperature of the supplementary light board 4 according to the execution command. Compared with Embodiment 1, this embodiment eliminates the main control PCB board 2 and replaces it with the driver PCB board 7, thereby reducing the number of chips. While the price of a main control chip with touch recognition is higher than that without touch recognition, the two methods are slightly different, but the overall cost difference is not significant.

[0038] In addition, the driving PCB board 7 is usually independent of the touch controller 1. This is mainly because the power components on the driving PCB board 7 are relatively large. If the touch controller 1 and the driving PCB board 7 are combined, that is, the PCB acquisition board 11 and the driving PCB board 7 are combined into one PCB board, in principle, a circuit board can be saved. However, the height of the power components of the touch controller 1 and the driving PCB board 7 will make the overall thickness of the car makeup mirror supplementary lighting device provided in this embodiment relatively large, which is not conducive to the development path of product thinning.

[0039] Example 3

[0040] like Figure 5 and Figure 6As shown, the in-vehicle makeup mirror supplementary lighting device provided in this embodiment includes a PCB acquisition board 11, a first light guide plate 14, and a control chip. The first light guide plate 14 is located on the front of the PCB acquisition board 11, and at least one touch pad 112 is disposed on the PCB acquisition board 11. The first light guide plate 14 covers at least one touch pad 112. The control chip is located on the back of the PCB acquisition board 11, and at least one touch pad 112 is electrically connected to the control chip. The difference between Embodiment 3 and Embodiments 1 and 2 is that:

[0041] A second light guide plate 41 is provided on the supplementary light plate 4. The second light guide plate 41 is integrally formed with the first light guide plate 14, that is, the second light guide plate 41 and the first light guide plate 14 share a single plate. Sharing a single plate helps to save costs on the supplementary lighting device for the car vanity mirror. The above method is based on the premise that the distance between the touch controller 1 and the supplementary light plate 4 is as close as possible. If the distance between the two is too far, the touch controller 1 usually needs to be set up separately.

[0042] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A car-mounted vanity mirror supplementary lighting device, characterized in that, include: PCB acquisition board (11); A first light guide plate (14) is located on the front of a PCB acquisition board (11). At least one touch panel (112) is provided on the PCB acquisition board (11), and the first light guide plate (14) covers at least one of the touch panels (112). A control chip is located on the back of the PCB acquisition board (11); At least one of the touch pads (112) is electrically connected to the control chip.

2. The in-vehicle vanity mirror supplementary lighting device according to claim 1, characterized in that: It also includes chip auxiliary circuitry; The chip auxiliary circuit is electrically connected to the control chip; The chip auxiliary circuit is located on the back of the PCB acquisition board (11).

3. The in-vehicle vanity mirror supplementary lighting device according to claim 1, characterized in that: At least one LED bead (15) is provided at the edge of the first light guide plate (14); At least one of the LED beads (15) is fixed to the front side of the PCB acquisition board (11).

4. The in-vehicle vanity mirror supplementary lighting device according to claim 1, characterized in that: The first light guide plate (14) is provided with a light tooth layer (141).

5. The in-vehicle vanity mirror supplementary lighting device according to claim 4, characterized in that: The first light guide plate (14) is provided with at least one positioning hole (142).

6. The in-vehicle vanity mirror supplementary lighting device according to claim 2, characterized in that: It also includes a sponge pad (12); The sponge pad (12) is located on the back of the PCB acquisition board (11).

7. The in-vehicle vanity mirror supplementary lighting device according to claim 6, characterized in that: The sponge pad (12) is configured as a U-shaped pad; The U-shaped pad is located at the edge of the back of the PCB acquisition board (11); The U-shaped pad has a receiving opening (13), and the acquisition chip (111) and the chip auxiliary circuit are located in the receiving opening (13).

8. The in-vehicle vanity mirror supplementary lighting device according to claim 1, characterized in that: The control chip is configured as a data acquisition chip (111); It also includes a main control PCB board (2) and at least one supplementary lighting board (4); The main control PCB board (2) is equipped with a main control chip without touch recognition; The PCB acquisition board (11) is electrically connected to the main control PCB board (2); At least one of the supplementary lighting boards (4) is electrically connected to the main control PCB board (2).

9. The in-vehicle vanity mirror supplementary lighting device according to claim 1, characterized in that: The control chip is configured as a main control chip with touch recognition; It also includes a driving PCB board (7) and at least one supplementary lighting board (4); The driving PCB board (7) is electrically connected to the control chip of the PCB acquisition board (11); At least one of the supplementary lighting boards (4) is electrically connected to the driving PCB board.

10. The vehicle-mounted vanity mirror supplementary lighting device according to claim 8 or 9, characterized in that: The supplementary lighting plate (4) is provided with a second light guide plate (41); The second light guide plate (41) is integrally formed with the first light guide plate (14).

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