Backlight structure capable of improving heat dissipation effect

Abstract

The backlight structure capable of improving the heat dissipation effect comprises a supporting frame, a heat insulation piece, an optical element and an LED lamp strip, the supporting frame comprises a metal frame, a containing cavity is formed in the metal frame, and the heat insulation piece is arranged at the bottom of the containing cavity; the optical element comprises a light guide plate and a reflector plate, the light guide plate and the reflector plate are contained in the containing cavity, and the reflector plate is located on the side face, close to the heat insulation piece, of the light guide plate. The LED light bar is installed on one side wall of the containing cavity, and heat conducting glue is arranged on the face, facing the side wall of the containing cavity, of the LED light bar. The heat-conducting glue is arranged on the LED light bar, heat of the LED light bar is conducted to the metal frame through the heat-conducting glue, rapid heat dissipation is achieved, meanwhile, the heat insulation part is arranged at the bottom of the containing cavity, heat conducted to the optical element from the metal frame is reduced through the heat insulation part, then heat conducted to the surface of the display screen is reduced, and the problem of temperature rise of the surface of the display screen is solved; and the heat dissipation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screen production, in particular to a backlight structure capable of improving heat dissipation effect. Background Art

[0002] With the continuous advancement and development of science and technology, display devices are widely used in various fields, wherein the backlight structure in the display screen is used to provide light source for the display screen.

[0003] For example, in-vehicle displays are required to be visible under strong light, so the brightness is generally required to be above 1000 nit. As the brightness requirement increases, the backlight power consumption also increases, but the touch experience of the touch screen requires that the surface temperature rise should not be too high. Therefore, while providing backlight brightness and power, the temperature of the display surface cannot be increased.

[0004] In view of the above, a backlight structure capable of improving the heat dissipation effect is proposed, so as to reduce the temperature of the display area of ​​the display screen and solve the problem of temperature rise on the surface of the display screen. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a backlight structure capable of improving the heat dissipation effect, thereby reducing the temperature of the display area of ​​the display screen to solve the problem of temperature rise on the surface of the display screen.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A backlight structure capable of improving heat dissipation effect comprises: a support frame, a heat insulating member, an optical element and an LED light strip, wherein the support frame comprises a metal frame, a receiving cavity is provided on the metal frame, and the heat insulating member is arranged at the bottom of the receiving cavity; the optical element comprises a light guide plate and a reflective sheet, the light guide plate and the reflective sheet are respectively received in the receiving cavity, and the reflective sheet is located on a side surface of the light guide plate close to the heat insulating member; the LED light strip is installed on a side wall of the receiving cavity, and a heat conductive adhesive is arranged on a side of the LED light strip facing the side wall of the receiving cavity.

[0008] In one embodiment, the metal frame is an aluminum alloy frame.

[0009] In one of the embodiments, the support frame further includes a plastic frame, a avoidance cavity is formed on the plastic frame, the metal frame is accommodated in the avoidance cavity, and the opening side of the metal frame faces the bottom of the avoidance cavity.

[0010] In one embodiment, two inner side walls of the plastic rack are respectively provided with guiding inclined surfaces.

[0011] In one embodiment, the thermal insulation element is a thermal insulation film.

[0012] In one of the embodiments, the LED light strip includes an FPC and an LED lamp, the LED lamp is arranged on the FPC, and the FPC is installed on a side wall of the accommodating cavity, and the thermal conductive adhesive is arranged on a surface of the FPC facing the side wall of the accommodating cavity.

[0013] In one embodiment, the optical element further includes an optical film, and the optical film is disposed on a side surface of the light guide plate away from the reflective sheet.

[0014] In one embodiment, the optical film includes a diffusion film, a lower brightness enhancement sheet and an upper brightness enhancement sheet, the diffusion film, the lower brightness enhancement sheet and the upper brightness enhancement sheet are stacked in sequence, and the diffusion film is located on a side surface of the lower brightness enhancement sheet close to the light guide plate.

[0015] In one of the embodiments, a light-shielding rubber pad is further included, and the light-shielding rubber pad is attached to the outer side of the rubber frame.

[0016] In one of the embodiments, the shading pad is a black foam shading pad.

[0017] Compared with the prior art, the utility model has at least the following advantages:

[0018] The utility model discloses a backlight structure capable of improving the heat dissipation effect by setting a support frame, a heat insulating member, an optical element and an LED light strip. Since the LED light strip is the main heat generating body, a thermal conductive adhesive is set on the LED light strip, and the heat of the LED light strip is conducted to the metal frame through the thermal conductive adhesive to achieve rapid heat dissipation. At the same time, a heat insulating member is set at the bottom of the accommodating cavity, and the heat conduction on the metal frame to the optical element is reduced through the heat insulating member, thereby reducing the heat conduction to the surface of the display screen. In this way, the temperature of the display area of ​​the display screen can be reduced to solve the problem of temperature rise on the surface of the display screen and improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0020] Figure 1 This is a schematic diagram of the front structure of a backlight structure capable of improving the heat dissipation effect in one embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the back structure of a backlight structure capable of improving the heat dissipation effect in one embodiment of the utility model;

[0022] Figure 3It is a schematic diagram of a stacked structure of a backlight structure capable of improving heat dissipation effect in an embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0024] See also Figure 1 , Figure 2 and Figure 3 As shown, a backlight structure 10 capable of improving heat dissipation effect includes: a support frame 100, a heat insulating member 200, an optical element 300 and an LED light strip 400, the support frame 100 includes a metal frame 110, a receiving cavity is opened on the metal frame 110, and the heat insulating member 200 is arranged at the bottom of the receiving cavity; the optical element 300 includes a light guide plate 310 and a reflective sheet 320, the light guide plate 310 and the reflective sheet 320 are respectively accommodated in the receiving cavity, and the reflective sheet 320 is located on a side surface of the light guide plate 310 close to the heat insulating member 200; the LED light strip 400 is installed on a side wall of the receiving cavity, and a thermal conductive adhesive 410 is arranged on a side of the LED light strip 400 facing the side wall of the receiving cavity.

[0025] It should be noted that in the backlight structure, the LED light bar is the core heat source, so in the present invention, a thermal conductive adhesive 410 is arranged on the side of the side wall of the LED light bar 400 facing the accommodating cavity, and the heat is conducted to the metal frame 110 through the thermal conductive adhesive 410. The metal frame 110 dissipates part of the heat into the air through thermal radiation, and the other part of the heat is conducted to the display area of ​​the display screen through the optical element 300. Therefore, in order to block the heat on the metal frame 110 from being conducted from the direction of the optical element 300, a heat insulating member 200 is arranged at the bottom of the accommodating cavity of the metal frame 110. The heat insulating member 200 reduces the heat conduction from the metal frame to the optical element, and then reduces the heat conduction to the surface of the display screen. In this way, the temperature of the display area of ​​the display screen can be reduced to solve the problem of temperature rise on the surface of the display screen and improve the heat dissipation effect. For example, the thermal conductivity of the heat insulating member 200 is below 0.1W / mK. Preferably, the heat insulating member is a heat insulating film. Similarly, the heat insulating member may also be made of other heat insulating materials, such as heat insulating foam and heat insulating board. Since the specific materials of the heat insulating member are prior art, they are not described here. Specifically, the LED light bar 400 includes an FPC 420 and an LED lamp 430. The LED lamp 430 is arranged on the FPC 420, and the FPC 420 is installed on a side wall of the accommodating cavity. A heat conductive adhesive 410 is arranged on the side wall of the FPC 420 facing the accommodating cavity. That is, the FPC 420 and the LED lamp 430 are transferred to the metal frame 110 through the heat conductive adhesive 410.

[0026] Preferably, the metal frame 110 is an aluminum alloy frame, which can ensure the heat dissipation effect.

[0027] Furthermore, the support frame 100 also includes a plastic frame 120, and a avoidance cavity is provided on the plastic frame 120, and the metal frame is accommodated in the avoidance cavity, and the opening side of the metal frame faces the bottom of the avoidance cavity. The connection and fixation of the backlight structure and the display screen are achieved through the plastic frame 120. Furthermore, guide slopes 121 are respectively provided on the two inner side walls of the plastic frame 120, and the opening end of the plastic frame 120 is enlarged by the guide slopes 121, so that the metal frame can be quickly loaded into the avoidance cavity of the plastic frame 120.

[0028] Furthermore, the optical element 300 further includes an optical film 330, which is disposed on a side surface of the light guide plate 310 away from the reflective sheet 320, and the brightness and uniformity of the light are further improved by the optical film 330. Specifically, the optical film 330 includes a diffusion film, a lower brightness enhancement sheet, and an upper brightness enhancement sheet, which are stacked in sequence, and the diffusion film is located on a side surface of the lower brightness enhancement sheet close to the light guide plate.

[0029] Furthermore, the backlight structure further includes a light shielding rubber pad 500, which is attached to the outer side of the rubber frame 120. That is, the light shielding rubber pad 500 is located between the backlight structure and the display screen, and the light shielding rubber pad 500 plays a light shielding role to prevent light from leaking sideways. Preferably, the light shielding rubber pad 500 is a black foam light shielding rubber pad.

[0030] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A backlight structure capable of improving heat dissipation effect, characterized in that: include: The support frame comprises a metal frame, and a receiving cavity is provided on the metal frame. A heat insulating member, the heat insulating member being arranged at the bottom of the accommodating cavity; An optical element, wherein the optical element comprises a light guide plate and a reflective sheet, wherein the light guide plate and the reflective sheet are respectively accommodated in the accommodation cavity, and the reflective sheet is located on a side surface of the light guide plate close to the heat insulating member; and An LED light bar is installed on a side wall of the accommodating cavity, and a heat-conducting adhesive is arranged on a surface of the LED light bar facing the side wall of the accommodating cavity.

2. The backlight structure capable of improving heat dissipation effect according to claim 1, characterized in that: The metal frame is an aluminum alloy frame.

3. The backlight structure capable of improving heat dissipation effect according to claim 2, characterized in that: The support frame also includes a glue frame, a avoidance cavity is opened on the glue frame, the metal frame is accommodated in the avoidance cavity, and the opening side of the metal frame faces the bottom of the avoidance cavity.

4. The backlight structure capable of improving heat dissipation effect according to claim 3, characterized in that: The two inner side walls of the rubber frame are respectively provided with guiding inclined surfaces.

5. The backlight structure capable of improving heat dissipation effect according to claim 1, characterized in that: The heat insulating member is a heat insulating film.

6. The backlight structure capable of improving heat dissipation effect according to claim 1, characterized in that: The LED light bar includes an FPC and an LED light, wherein the LED light is arranged on the FPC, and the FPC is installed on a side wall of the accommodating cavity, and the thermal conductive adhesive is arranged on a surface of the FPC facing the side wall of the accommodating cavity.

7. The backlight structure capable of improving heat dissipation effect according to claim 1, characterized in that: The optical element further comprises an optical film, and the optical film is arranged on a side surface of the light guide plate away from the reflective sheet.

8. The backlight structure capable of improving heat dissipation effect according to claim 7, characterized in that: The optical film comprises a diffusion film, a lower brightness enhancement sheet and an upper brightness enhancement sheet, which are stacked in sequence, and the diffusion film is located on a side surface of the lower brightness enhancement sheet close to the light guide plate.

9. The backlight structure capable of improving heat dissipation effect according to claim 3, characterized in that: It also includes a light-shielding rubber pad, which is attached to the outer side of the rubber frame.

10. The backlight structure capable of improving heat dissipation effect according to claim 9, characterized in that: The shading rubber pad is a black foam shading rubber pad.

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