Built-in sensor of liquid crystal display screen

Abstract

The utility model discloses a liquid crystal display screen built-in sensor which comprises a PCB base plate, an aluminum protective cover, an LED light source and a photosensitive chip, a first light-transmitting circular plate and a second light-transmitting circular plate are arranged at an opening in the top end of the aluminum protective cover, and the first light-transmitting circular plate and the second light-transmitting circular plate correspond to the LED light source and the photosensitive chip respectively. A heat dissipation base strip is arranged at the position of an opening in the front end of the aluminum protection cover, a closed liquid heat conduction cavity is formed in the front end between the first enclosure frame and the second enclosure frame, and a plurality of heat conduction rods are arranged at the front end of the closed liquid heat conduction cavity. The front end between the first enclosure frame and the second enclosure frame is provided with the closed liquid heat conduction cavity, the closed liquid heat conduction cavity is in contact connection with the contacts of the heat dissipation base strip through the multiple heat conduction rods, the advantage that the specific heat capacity of water is large is used for achieving contact type water-cooling heat conduction and dissipation, and the heat dissipation effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to a sensor built in a liquid crystal display screen, belonging to the technical field of sensors. Background Technique

[0002] A light sensor, also called a brightness sensor, with the English name Light-Sensor, is equipped in many tablet computers and mobile phones. Generally located above the screen of a handheld device, it can automatically adjust the screen brightness of the handheld device according to the current light brightness of the handheld device, bringing the best visual effect to the user. For example, in a dark environment, the backlight of the handheld device screen will automatically dim, otherwise it will be very dazzling. The light sensor includes a light source, a photosensitive chip, a PCB substrate, etc. Patent No. CN201920456616.8 discloses a light sensor, including a substrate, an LED light source, a photosensitive chip, and further including a groove, a retaining ring, a light-shielding heat dissipation frame, a cover, a reflector, a first light-transmitting plate, and a second light-transmitting plate arranged on the upper surface of the substrate. The light-shielding heat dissipation frame and the retaining ring are made of pure aluminum, and the heat generated by the LED light source during operation can be transferred to the light-shielding heat dissipation frame and the retaining ring through the substrate, thereby increasing the heat dissipation area; the retaining ring is embedded in the groove on the substrate, and the light-shielding heat dissipation frame is inserted into the retaining ring to prevent light from leaking out from the lower end of the substrate. Similarly, by inserting the light-shielding heat dissipation frame into the card slot on the cover and setting the reflector, the light emitted by the LED light source can all be emitted through the first light-transmitting plate, effectively preventing light from leaking out from the upper end of the substrate. The device has a simple structure, can form an effective enclosure, making the light emitted by the LED light source not easy to leak out, effectively improving the detection accuracy, and effectively increasing the heat dissipation area and improving the heat dissipation performance.

[0003] The disadvantages of the above-mentioned disclosed light sensor are as follows: in terms of heat dissipation, relying solely on heat conduction and dissipation through the light-shielding heat dissipation frame and the retaining ring is difficult to ensure the heat dissipation effect. Therefore, we designed a sensor built in a liquid crystal display screen. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sensor built in a liquid crystal display screen to solve the problems raised in the above background technique.

[0005] To achieve the above object, the present utility model provides the following technical solution: A built-in sensor for a liquid crystal display screen, comprising a PCB base plate, an aluminum protective cover, an LED light source, and a photosensitive chip. The aluminum protective cover is hermetically arranged at the square area of the PCB base plate. A first enclosing frame and a second enclosing frame are arranged inside the aluminum protective cover. The LED light source and the photosensitive chip are respectively located inside the first enclosing frame and the second enclosing frame. At the opening at the top of the aluminum protective cover, a first light-transmitting circular plate and a second light-transmitting circular plate are arranged. The first light-transmitting circular plate and the second light-transmitting circular plate respectively correspond to the LED light source and the photosensitive chip. At the front opening of the aluminum protective cover, a heat dissipation base strip is arranged. At the front end between the first enclosing frame and the second enclosing frame, a closed liquid heat conduction cavity is arranged. At the front end of the closed liquid heat conduction cavity, a plurality of heat conduction rods are arranged. All the plurality of heat conduction rods are in contact connection with the contacts of the heat dissipation base strip.

[0006] In the above-mentioned built-in sensor for a liquid crystal display screen, insulating card seats are arranged at two card slots of the PCB base plate. Circuit board insulating connection strips are arranged at the bottoms of both insulating card seats.

[0007] In the above-mentioned built-in sensor for a liquid crystal display screen, an insulating card sheath is arranged at one side of the bottom end of the PCB base plate. External connection terminals connected to the LED light source and the photosensitive chip are arranged inside the insulating card sheath.

[0008] In the above-mentioned built-in sensor for a liquid crystal display screen, the axes of the first light-transmitting circular plate and the second light-transmitting circular plate respectively coincide with the axes of the LED light source and the photosensitive chip.

[0009] In the above-mentioned built-in sensor for a liquid crystal display screen, a plurality of connecting bumps are arranged at the top end of the heat dissipation base strip. The heat dissipation base strip is movably connected to the front opening of the aluminum protective cover through the plurality of connecting bumps.

[0010] In the above-mentioned built-in sensor for a liquid crystal display screen, the liquid inside the closed liquid heat conduction cavity is water.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] 1. The present utility model relates to an in - built sensor for a liquid crystal display screen. By arranging a heat - dissipation base strip at the front - end opening of an aluminum protection cover, a closed - type liquid heat - conduction cavity is arranged at the front end between a first enclosing frame and a second enclosing frame. The closed - type liquid heat - conduction cavity is in contact connection with the contacts of the heat - dissipation base strip through a plurality of heat - conduction rods. By utilizing the advantage of the large specific heat capacity of water, contact - type water - cooled heat - conduction and heat - dissipation are realized, greatly improving the heat - dissipation effect. By arranging insulating card holders at two bayonet openings of a PCB base plate and arranging a circuit - board insulating connection strip at the bottom end of the insulating card holders, it is convenient to better install the PCB base plate at the internal circuit board of the liquid crystal display screen, having good convenience and stability. Brief Description of the Drawings

[0013] Figure 1 is a three - dimensional structural schematic diagram of an in - built sensor for a liquid crystal display screen according to the present utility model.

[0014] Figure 2 is an internal structural schematic diagram of an aluminum protection cover of an in - built sensor for a liquid crystal display screen according to the present utility model.

[0015] Figure 3 is a structural schematic diagram of a PCB base plate of an in - built sensor for a liquid crystal display screen according to the present utility model.

[0016] In the figure: 1. PCB base plate; 2. Aluminum protection cover; 3. First light - transmitting circular plate; 4. Second light - transmitting circular plate; 5. Heat - dissipation base strip; 6. Connection bump; 7. Insulating card sheath; 8. External terminal; 9. Circuit - board insulating connection strip; 10. Insulating card holder; 11. First enclosing frame; 12. LED light source; 13. Second enclosing frame; 14. Photosensitive chip; 15. Closed - type liquid heat - conduction cavity; 16. Heat - conduction rod. Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0018] Please refer to Figures 1-3 , the present utility model provides a technical solution for an in - built sensor for a liquid crystal display screen:

[0019] Embodiment: The sensor includes a PCB base plate 1, an aluminum protective cover 2, an LED light source 12, and a photosensitive chip 14. The aluminum protective cover 2 is hermetically arranged at the square area of the PCB base plate 1. A first enclosing frame 11 and a second enclosing frame 13 are arranged inside the aluminum protective cover 2. The LED light source 12 and the photosensitive chip 14 are respectively located inside the first enclosing frame 11 and the second enclosing frame 13. At the opening at the top of the aluminum protective cover 2, a first light-transmitting circular plate 3 and a second light-transmitting circular plate 4 are arranged. The first light-transmitting circular plate 3 and the second light-transmitting circular plate 4 respectively correspond to the LED light source 12 and the photosensitive chip 14. Among them, the axes of the first light-transmitting circular plate 3 and the second light-transmitting circular plate 4 respectively coincide with the axes of the LED light source 12 and the photosensitive chip 14.

[0020] Embodiment 2: At the front opening of the aluminum protective cover 2, a heat dissipation base strip 5 is arranged. At the top of the heat dissipation base strip 5, a plurality of connecting bumps 6 are arranged. The heat dissipation base strip 5 is movably connected to the front opening of the aluminum protective cover 2 through the plurality of connecting bumps 6. At the front end between the first enclosing frame 11 and the second enclosing frame 13, a closed liquid heat conduction cavity 15 is arranged. At the front end of the closed liquid heat conduction cavity 15, a plurality of heat conduction rods 16 are arranged. The plurality of heat conduction rods 16 are all in contact connection with the contacts of the heat dissipation base strip 5.

[0021] Among them: The liquid inside the closed liquid heat conduction cavity 15 is water. The water can also be a coolant or other liquids with a large specific heat capacity.

[0022] In this embodiment, in order to better install the PCB base plate 1 to the internal circuit board of the liquid crystal display, it has good convenience and stability. Insulating card holders 10 are arranged at the two card slots of the PCB base plate 1. Circuit board insulating connection strips 9 are arranged at the bottom ends of the two insulating card holders 10.

[0023] In this embodiment, in order to better access the power terminal part of the circuit board, an insulating card sheath 7 is arranged at one side of the bottom end of the PCB base plate 1. An external terminal 8 connected to the LED light source 12 and the photosensitive chip 14 is arranged inside the insulating card sheath 7.

[0024] Working principle: The external terminal 8 is connected to the power terminal part of the circuit board, so that the PCB base plate 1 is installed inside the liquid crystal display. The heat dissipation base strip 5 is movably connected to the front opening of the aluminum protective cover 2 through the plurality of connecting bumps 6, which makes the plurality of heat conduction rods 16 of the closed liquid heat conduction cavity 15 in contact connection with the contacts of the heat dissipation base strip 5. When the LED light source 12 and the photosensitive chip 14 are powered on and start to work, heat is generated. Since the closed liquid heat conduction cavity 15 is connected to the first enclosing frame 11 and the second enclosing frame 13, the advantage of the large specific heat capacity of water is utilized to achieve contact-type water-cooled heat conduction and heat dissipation, greatly improving the heat dissipation effect.

[0025] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A built-in sensor for a liquid crystal display screen, comprising a PCB base plate (1), an aluminum protective cover (2), an LED light source (12) and a photosensitive chip (14), characterized in that: The aluminum protective cover (2) is sealed and arranged in a square area of ​​the PCB base plate (1); a first enclosure frame (11) and a second enclosure frame (13) are arranged inside the aluminum protective cover (2); the LED light source (12) and the photosensitive chip (14) are located inside the first enclosure frame (11) and inside the second enclosure frame (13), respectively; a first light-transmitting circular plate (3) and a second light-transmitting circular plate (4) are arranged at the opening at the top end of the aluminum protective cover (2); the first light-transmitting circular plate (11) and the second light-transmitting circular plate (13) are arranged at the top end of the aluminum protective cover (2); (3) and the second light-transmitting circular plate (4) correspond to the LED light source (12) and the photosensitive chip (14) respectively; a heat dissipation base strip (5) is arranged at the front end opening of the aluminum protective cover (2); a closed liquid heat conduction cavity (15) is arranged at the front end between the first enclosure frame (11) and the second enclosure frame (13); a plurality of heat conduction rods (16) are arranged at the front end of the closed liquid heat conduction cavity (15); and the plurality of heat conduction rods (16) are all in contact with and connected to the contact points of the heat dissipation base strip (5).

2. The built-in sensor for a liquid crystal display according to claim 1, characterized in that: Insulating sockets (10) are arranged at two sockets of the PCB base plate (1), and circuit board insulating strips (9) are arranged at the bottom ends of the two insulating sockets (10).

3. The built-in sensor for a liquid crystal display according to claim 1, characterized in that: An insulating card sleeve (7) is provided on one side of the bottom end of the PCB base plate (1), and an external terminal (8) connected to the LED light source (12) and the photosensitive chip (14) is provided inside the insulating card sleeve (7).

4. The built-in sensor for a liquid crystal display according to claim 1, characterized in that: The axis of the first light-transmitting circular plate (3) and the axis of the second light-transmitting circular plate (4) coincide with the axis of the LED light source (12) and the axis of the photosensitive chip (14), respectively.

5. The built-in sensor for a liquid crystal display according to claim 1, characterized in that: The top end of the heat dissipation base strip (5) is provided with a plurality of connection protrusions (6), and the heat dissipation base strip (5) is movably connected to the front end opening of the aluminum protective cover (2) via the plurality of connection protrusions (6).

6. The built-in sensor for a liquid crystal display according to claim 1, characterized in that: The liquid inside the closed liquid heat-conducting cavity (15) is water.

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