CN211979373U

CN211979373U - Vehicle-mounted backlight heat dissipation structure

Info

Publication number: CN211979373U
Application number: CN202020509036.3U
Authority: CN
Inventors: 殷雄
Original assignee: Xingyuan Electronic Technology Shenzhen Co Ltd
Current assignee: Xingyuan Electronic Technology Shenzhen Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-11-20
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a vehicle-mounted backlight radiating structure, which comprises an outer frame, a middle frame, a circuit board and LED lamps, wherein the outer frame is arranged on the middle frame, the circuit board is adhered to the side surface of the outer frame through heat-conducting double-sided adhesive, the LED lamps are uniformly distributed on the circuit board, heat-sensitive resistors are arranged on the circuit board, a heat homogenizing sheet, a reflecting sheet and a light guide plate are arranged on the bottom surface of the outer frame, the light guide plate is opposite to the LED lamps, and a brightness enhancement sheet and a diffusion sheet are arranged on the light guide plate; the utility model discloses a vehicle-mounted heat radiation structure in a poor light has the good characteristics of heat conduction radiating effect, can conduct most heat in the backlight rapidly, guarantees the luminous life-span of LED lamp.

Description

Vehicle-mounted backlight heat dissipation structure

Technical Field

The utility model relates to a technical field that the TFT module heat dissipation was handled especially relates to an on-vehicle heat radiation structure in a poor light.

Background

Along with the continuous rapid development of science and technology, the economic living standard is improved, the automobile is increasingly demanded as a travel tool for people, the demand on the liquid crystal display industry is increased along with the increase of the water level, the market demand on products is enlarged, the requirements on various aspects are more and more strict, and the continuous improvement of the heat dissipation effect of the backlight product of the vehicle-mounted module is a subject worth researching in the industry.

The module finished product improves backlight heat dissipation, and it is especially crucial problem to improve the reliability under different environmental conditions in a poor light, and vehicle-mounted backlight heat dissipation structure technical research compares in traditional backlight: 1. compared with the traditional metal outer frame used in the backlight, the metal outer frame with high heat conductivity is required to be used; 2. in the traditional product assembling process, the LED lamp strip light-emitting and heat-generating source is generally fixed by double faced adhesive tape or liquid adhesive tape, the vehicle-mounted backlight structure is technically required to be fixed by heat-conducting double faced adhesive tape, heat generated by LED light emission is simply and effectively and directly conducted away 3, a brighter LED is searched, the backlight brightness is adjusted, the current is well controlled by matching with a heat sensitive resistor, the customer demand is met, and the market competitiveness is increased.

In summary, because high brightness and reliability of the vehicle-mounted module are required, a high-power LED is required to be used for improving the brightness, and because the LED generates a large amount of heat in the process of emitting light, if the heat is not well conducted away, the whole module has a certain quality influence, and then the reliability is relatively poor. The LED lamp is welded on the FPC and then fixed inside the metal outer frame. In the traditional module structure, because the brightness requirement is not high, the power consumption requirement of the LED is not so large, and the heat generation is also small, the trouble caused by the heat dissipation problem is rarely considered. Some manufacturers consider the heat dissipation problem, mainly paste a layer of heat conduction material outside the metal, or adopt unsaturated power supply mode to reduce and generate heat, and the module heat dissipation problem all has certain limitation in the above traditional mode solution.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a vehicle-mounted backlight radiating structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses an on-vehicle heat radiation structure in a poor light, including frame, center, circuit board and LED lamp, the frame is located on the center, wherein, the circuit board passes through the two-sided sticky subsides of heat conduction in the frame side, LED lamp evenly distributed is on the circuit board, be equipped with the heat-sensitive resistance on the circuit board, the frame bottom surface is equipped with even heat piece, reflector plate and light guide plate, the light guide plate is relative with LED lamp position, be equipped with brightness enhancement piece and diffusion piece on the light guide plate.

Preferably, the outer frame is an aluminum profile outer frame, and the middle frame is a plastic middle frame.

Preferably, the even heat sheet is laid on the whole bottom surface of the outer frame.

Preferably, the circuit board is an FPC board.

Preferably, the thickness of the light guide plate is greater than the width of the LED lamp.

Compared with the prior art, the beneficial effects of the utility model are that:

a uniform heating sheet is pasted on the front area where the LED emits light and generates heat, a heat conduction double-sided adhesive tape is pasted on the back area of the circuit board where the LED is welded, and heat dissipated from the front and the back of the LED is rapidly conducted out to distribute heat. Through welding heat-sensitive resistance on the circuit board, the balance matching of inside heat of control and electric current, through the metal frame that thermal conductivity is good, lead away the heat of lamp strip front and back output fast, two-way expansion utilizes internal and external structural change, reaches novel on-vehicle radiating effect in a poor light.

Drawings

Fig. 1 is a schematic view of a vehicular backlight heat dissipation structure according to an embodiment of the present invention;

fig. 2 is a schematic heat conduction diagram of a vehicle-mounted backlight heat dissipation structure according to an embodiment of the present invention;

fig. 3 is a schematic view of an outer frame and a heat conducting material of a vehicle-mounted backlight heat dissipation structure according to an embodiment of the present invention.

In the figure: the LED backlight module comprises an outer frame 1, a middle frame 2, a circuit board 3, a heat-conducting double-sided adhesive tape 31, a heat-sensitive resistor 32, an LED lamp 4, a heat-homogenizing sheet 5, a reflector sheet 6, a light guide plate 7, a brightness enhancement sheet 8 and a diffusion sheet 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a vehicle-mounted backlight heat dissipation structure comprises an outer frame 1, a middle frame 2, a circuit board 3 and an LED lamp 4, wherein the circuit board 3 is an FPC circuit board, the outer frame 1 is arranged on the middle frame 2, the outer frame is an aluminum profile outer frame, the middle frame is a plastic middle frame, the outer frame and the middle frame mainly play a role in supporting and protecting, the outer frame is made of an aluminum plate, and the aluminum plate is light in weight, moderate in hardness, low in cost and capable of conducting heat quickly after absorbing heat and guiding the heat out to the outside of the vehicle-mounted backlight heat dissipation structure compared with the traditional stainless steel galvanized aluminum. The LED lamp is the light emitting source, and the circuit board main function is electrically conductive for the LED lamp, simultaneously connects control panel.

The circuit board 3 is adhered to the side face of the outer frame 1 through the heat-conducting double-sided adhesive tape 31, the LED lamps 4 are uniformly distributed on the circuit board 3, the circuit board 3 is provided with heat-sensitive resistors 32, the bottom face of the outer frame 1 is provided with a uniform heating sheet 5, a reflector sheet 6 and a light guide plate 7, the uniform heating sheet 5 is paved on the bottom face of the whole outer frame 1, the light guide plate 7 is opposite to the LED lamps 4, the thickness of the light guide plate 7 is larger than the width of the LED lamps 4, and the light guide plate 7 is provided with a light intensifying sheet 8 and. The light guide plate 7 has the function of collecting all light beams in other directions and then converting the light beams into light beams which are emitted upwards uniformly to improve the utilization rate of the light; the brightness enhancement film 8 secondarily enhances the utilization rate of light; the diffuser 9 is used to homogenize and soften the light in different areas.

Because the heat-conducting double-sided adhesive tape 31 has the characteristics of high temperature resistance, super heat conduction and non-conductivity, the heat conduction between the heat of the lamp strip and the metal aluminum frame can be well promoted, the heat accumulation on the lamp strip is reduced, and the inherent fixing effect is kept. When the LED lamp is used, the front heat and the back heat are large, and when the metal aluminum frame absorbs the heat, a certain amount of heat is gathered, so that the whole uniform heating sheet 5 is paved at the bottom of the outer frame, the gathered heat is rapidly dispersed through the uniform heating sheet, and the internal material and the external structure are protected better.

A heat conduction double faced adhesive tape for welding LED lamp, the circuit is walked the line and is openly, and a whole copper face is walked to back circuit, because of the heat conductivility of copper is good, can guarantee like this the stability of circuit board under the high temperature condition, can be fine again with the heat to lead the back.

The light guide plate 7 and the film are made of relatively thick high temperature resistant materials, which are required to withstand the inherent temperature conditions of the backlight itself and other environmental conditions brought by the automobile.

Referring to fig. 2, it can be known that the LED lamp is the source of heat production, lays the heat conduction material in the back below of lamp strip and guides thermal transmission, can be with the heat outside the quick derivation module.

Referring to fig. 3, a heat sensitive resistor is welded on the LED light bar, and is mainly located in the center of the whole backlight heat source, and the electrical aspect is independently connected with the control main board. The working principle of the thermistor is as follows: the temperature change in the middle of the heat source of the sensing module changes the resistance value of the sensing module, and the current supplied by the main board can be correspondingly adjusted, so that the balance and stability of the temperature in the backlight are kept.

The utility model discloses a heat dissipation vehicle-mounted backlight structure, in high low temperature environmental condition: the adaptability at high temperature and low temperature is 10-15 ℃, the brightness is 5 times higher than that of the vehicle-mounted backlight with the conventional structure, and even the space is increased.

The utility model discloses radiating industry is to the LED lamp strip to the on-vehicle heat radiation structure in a poor light, is fit for needing, and it is the hi-lite demand to mainly be directed to, and the LED heat dissipation of big consumption type has solved for a long time and has leaded to the material to present bad problem because of generating heat, has further optimized the whole radiating effect of product simultaneously, and stable product property can improve the product quality.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a vehicle-mounted heat radiation structure in a poor light, includes frame, center, circuit board and LED lamp, the frame is located on the center, its characterized in that: the LED lamp heat dissipation device comprises a circuit board, LED lamps, a heat-conducting double-sided adhesive, a reflecting sheet, a light guide plate and a light-intensifying sheet, wherein the circuit board is adhered to the side face of an outer frame through the heat-conducting double-sided adhesive, the LED lamps are uniformly distributed on the circuit board, a heat sensitive resistor is arranged on the circuit board, the bottom face of the outer.

2. The vehicular backlight heat dissipation structure according to claim 1, characterized in that: the frame is the aluminium alloy frame, and the center is the plastic center.

3. The vehicular backlight heat dissipation structure according to claim 1, characterized in that: the even heat piece is laid on the bottom surface of the whole outer frame.

4. The vehicular backlight heat dissipation structure according to claim 1, characterized in that: the circuit board is an FPC circuit board.

5. The vehicular backlight heat dissipation structure according to claim 1, characterized in that: the thickness of the light guide plate is larger than the width of the LED lamp.