Display backlight module and equipment

Abstract

The utility model provides a display backlight module and equipment, the display backlight module comprises a lower iron frame and a middle iron frame, the middle iron frame is covered on the lower iron frame, a reflecting film, a light guide plate, a lower diffusion film, a lower BEF film, an upper BEF film and a DBEF film are arranged between the lower iron frame and the middle iron frame from bottom to top, one inner side wall of the lower iron frame is connected with an LED light bar through an adhesive tape, and the other inner side wall of the lower iron frame is connected with a light guide plate. The LED lamp strip comprises a plurality of LED lamp beads and a plurality of thermistors, and a first limiting column and a plurality of second limiting columns are arranged on the face, facing the lower diffusion film, of the light guide plate. By arranging the lower BEF film, the upper BEF film and the DBEF film, the display performance of the display backlight module is greatly improved; the thermistor is arranged, so that the reliability of the display backlight module at extreme air temperature is improved; by arranging the first limiting column and the second limiting column, the multiple layers of membranes are limited, and the structural stability of the display backlight module is improved.

Description

Technical Field

[0001] The utility model relates to the field of display technology, in particular to a display backlight module and equipment. Background Art

[0002] With the development of display devices and intelligent technologies, display devices are being used in more and more fields. Among them, cars are increasingly equipped with large-screen display devices.

[0003] In-vehicle display devices need to have high reliability. Not only are they required to be able to emit light stably while the vehicle is driving, but they are also required to be able to emit light normally even in extreme weather conditions. In addition to reliability, in-vehicle display devices should also meet certain display requirements, such as large size, uniform light emission, high color gamut, etc., to meet users' entertainment, navigation and other needs.

[0004] Existing in-vehicle display devices improve the stability of the device by setting a buffer body between the device support frame and the backlight film, but the film in the backlight module is often more than one layer, and the connection stability between the film also affects the overall reliability of the device. If there is slippage or misalignment between the film, it will have a negative impact on the uniformity and stability of the light emission. The stability of existing in-vehicle display devices still needs to be improved. In addition, the reliability of existing in-vehicle display devices at different temperatures also needs to be improved, and existing in-vehicle display devices still have deficiencies in display performance such as high brightness and high contrast. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a display backlight module and a device, aiming to solve the problem that the reliability and display performance of the vehicle-mounted display backlight module in the prior art are still insufficient.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A display backlight module comprises a lower iron frame and a middle iron frame, wherein the middle iron frame is covered on the lower iron frame, a reflective film, a light guide plate, a lower diffusion film, a lower BEF film, an upper BEF film and a DBEF film are arranged between the lower iron frame and the middle iron frame from bottom to top, an inner side wall of the lower iron frame is connected to an LED light bar through a rubber strip, the LED light bar comprises a plurality of LED lamp beads and a plurality of thermistors, the LED lamp beads are electrically connected to the thermistor and an FPC, the FPC is connected to the bottom of the lower iron frame, and a first limiting column and a first limiting column are arranged on a side of the light guide plate facing the lower diffusion film. A plurality of second limiting columns, a first limiting groove and a plurality of second limiting grooves are arranged on the lower diffusion membrane, a third limiting groove and a plurality of fourth limiting grooves are arranged on the lower BEF membrane, a fifth limiting groove and a plurality of sixth limiting grooves are arranged on the upper BEF membrane, a seventh limiting groove and a plurality of eighth limiting grooves are arranged on the DBEF membrane, the first limiting groove, the third limiting groove, the fifth limiting groove and the seventh limiting groove are all adapted to the first limiting column, and the second limiting groove, the fourth limiting groove, the sixth limiting groove and the eighth limiting groove are all adapted to the second limiting column.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: by setting the lower BEF film, the upper BEF film and the DBEF film, that is, three layers of films with a brightening function, the display performance of the display backlight module is greatly improved, and the performance goals of high color gamut, high brightness and high contrast are achieved; by setting the thermistor, the current between the LED lamp beads is adjusted and controlled according to the temperature, thereby improving the reliability of the display backlight module under extreme temperatures; by setting the first limit column and the second limit column, the multi-layer film is limited to prevent the multi-layer film and the light guide plate from slipping and dislocation during vehicle driving, thereby improving the integrity of the backlight assembly, improving the structural stability of the display backlight module, and enabling the display device to emit light stably and evenly with good reliability.

[0009] Furthermore, film fixing glue is respectively arranged between the light guide plate and the lower diffusion film, between the lower diffusion film and the lower BEF film, between the lower BEF film and the upper BEF film, and between the upper BEF film and the DBEF film.

[0010] Furthermore, a matching groove is provided on the diaphragm fixing adhesive, and the matching groove is adapted to the first limiting column.

[0011] Furthermore, the side wall of the light guide plate is concave to form a plurality of matching parts, the matching parts are connected to the silicone parts, and the silicone parts are connected to the middle iron frame on a side facing away from the light guide plate.

[0012] Furthermore, the inner side wall of the lower iron frame is connected to a side reflection film, and one side of the side reflection film is connected to the reflection film.

[0013] Furthermore, a side of the reflective film facing the light guide plate is connected to a fixing film, and a plurality of air-avoiding grooves are provided on the fixing film, and the air-avoiding grooves are adapted to the LED lamp beads.

[0014] Furthermore, a side of the middle iron frame facing away from the DBEF membrane is connected to a plurality of retaining walls. Furthermore, an inner side wall of the retaining wall is connected to a plurality of foam rubber strips.

[0015] Furthermore, a light-shielding adhesive is provided between the middle iron frame and the DBEF film.

[0016] A display device comprises the display backlight module described in the above technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram showing the structure of a backlight module in an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram showing a partial structure of a backlight module in an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram showing a partial structure of a backlight module in an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram showing a partial structure of a backlight module in an embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram showing a partial structure of a backlight module in an embodiment of the utility model;

[0022] Figure 6 It is a schematic diagram of a partially disassembled structure of a display backlight module in an embodiment of the utility model;

[0023] Figure 7 It is a schematic diagram showing a partial structure of a backlight module in an embodiment of the utility model;

[0024] Figure 8 This is a schematic diagram showing the structure of the lower iron frame in the backlight module in the embodiment of the utility model; description of the main component symbols:

[0025]

[0026]

[0027] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] See also Figures 1 to 8The display backlight module in the embodiment of the utility model includes a lower iron frame 100 and a middle iron frame 900, the middle iron frame 900 is covered on the lower iron frame 100, and a reflective film 200, a light guide plate 300, a lower diffusion film 400, a lower BEF film 500, an upper BEF film 600 and a DBEF film 700 are arranged between the lower iron frame 100 and the middle iron frame 900 from bottom to top, and a light-shielding glue 800 is arranged between the middle iron frame 900 and the DBEF film 700. Preferably, a plurality of snap parts are arranged on the outer wall of the lower iron frame 100, and a plurality of snap grooves matching the snap parts are arranged on the side wall of the middle iron frame 900, so that the lower iron frame 100 is connected and fastened to the middle iron frame 900, and the shapes of the light guide plate 300 and the multi-layer film are adapted to the lower iron frame 100, and the light-shielding glue 800 is in the shape of a square frame and is pasted on all sides of the DBEF film. Furthermore, corner light-shielding glue is respectively arranged at the four corners of the light-shielding glue 800 to further enhance the light-shielding effect. The BEF (Brightness Enhancement Film) film has a brightening effect, and the upper BEF film 600 and the lower BEF film 500 are orthogonal to the prism direction, and the thickness of both is 0.1 mm. It can be understood that the combination of multi-layer BEF films and two BEF films with orthogonal prism directions can more than double the brightness. When used in conjunction with DBEF film, the brightness can be further improved, greatly improving the display performance of the display backlight module. The display backlight module has high brightness, high color gamut, and high contrast, meeting the needs of today's consumers for vehicle-mounted display devices.

[0032] Preferably, a plurality of stud areas 101 are provided at the bottom of the lower iron frame 100 . The stud areas 101 are locations for fixing studs for fixing the assembly housing. A plurality of double-sided adhesive areas 102 and a plurality of edging adhesive areas 103 are also provided at the bottom of the lower iron frame 100 .

[0033] An inner side wall of the lower iron frame 100 is connected to an LED light strip through a rubber strip 130. The LED light strip includes a plurality of LED lamp beads 120 and a plurality of thermistors 121. The LED lamp beads 120 are electrically connected to the thermistors 121 and FPC110. The FPC110 is connected to the bottom of the lower iron frame 100. The reflective film 200 is connected to a fixed film 210 on one side facing the light guide plate 300. A plurality of air avoidance grooves 211 are provided on the fixed film 210. The air avoidance grooves 211 are adapted to the LED lamp beads 120. The inner side wall of the lower iron frame 100 is connected to a side reflective film 220. One side of the side reflective film 220 is connected to the reflective film 200. Preferably, the thermistor 121 is located between adjacent LED lamp beads 120. When the temperature rises, the resistance of the thermistor 121 increases, reducing the current during backlighting, thereby reducing heat generation to adapt to high temperature climates. When in low temperature climates, the resistance decreases. The shape of the rubber strip 130 is adapted to the shape of the inner wall of the lower iron frame 100. The fixing film 210 is located on the side of the reflective film 200 close to the LED lamp beads 120. The fixing film 210 is beneficial to increasing the stability between the light guide plate 300 and the reflective film 200. The side reflective film 220 is perpendicular to the reflective film 200, and the reflective film 200 is connected to the side reflective film 220 except for a side wall close to the LED lamp beads 120.

[0034] The light guide plate 300 is provided with a first limiting column 301 and a plurality of second limiting columns 302 on a side facing the lower diffusion film 400, the side wall of the light guide plate 300 is concave to form a plurality of matching parts 303, the matching part 303 is connected to the silicone part 320, and the silicone part 320 is connected to the middle iron frame 900 on a side facing away from the light guide plate 300, the lower diffusion film 400 is provided with a first limiting groove 401 and a plurality of second limiting grooves 402, the lower BEF film 500 is provided with a third limiting groove 501 and a plurality of fourth limiting grooves 502, the upper BEF film 600 is provided with a fifth limiting groove 601 and a plurality of sixth limiting grooves, the DBEF film 700 is provided with a seventh limiting groove 701 and a plurality of eighth limiting grooves, and the first The limiting groove 401, the third limiting groove 501, the fifth limiting groove 601 and the seventh limiting groove 701 are all adapted to the first limiting column 301, the second limiting groove 402, the fourth limiting groove 502, the sixth limiting groove and the eighth limiting groove are all adapted to the second limiting column 302, and a diaphragm fixing glue 310 is respectively arranged between the light guide plate 300 and the lower diffusion film 400, between the lower diffusion film 400 and the lower BEF film 500, between the lower BEF film 500 and the upper BEF film 600, and between the upper BEF film 600 and the DBEF film 700, and a matching groove 311 is arranged on the diaphragm fixing glue 310, and the matching groove 311 is adapted to the first limiting column 301. Preferably, the matching part 303 is located at the corner of the light guide plate 300, and the silicone part 320 can effectively prevent the light guide plate 300 from hitting the iron frame, thereby protecting the light guide plate 300 and preventing the light guide plate 300 from loosening during vehicle driving or loosening due to thermal expansion and contraction. The first limiting column 301 is located on the side of the light guide plate 300 close to the LED lamp bead 120, and the opposite sides of the light guide plate 300 are respectively connected to a second limiting column 302, and the top of the first limiting column 301 and the top of the second limiting column 302 are both flush with the DBEF film 700. The side of the light guide plate 300 facing the LED lamp bead 120 is concave to form a light guide plate air avoidance groove, and the diaphragm fixing glue 310 is located on the side of the diaphragm or light guide plate close to the LED lamp bead 120. It can be understood that the cooperation between the first limiting column 301 and the second limiting column 302 and the corresponding limiting grooves can fix the multi-layer diaphragm and the light guide plate as a whole. In conjunction with the diaphragm fixing glue 310, it can effectively prevent slippage and misalignment between the diaphragms, so that the display backlight module can always remain stable during the driving process of the vehicle even if it is affected by acceleration, deceleration and bumps, which is beneficial to the display backlight module to always emit light stably and evenly, thereby improving the reliability of the display backlight module.

[0035] The side of the middle iron frame 900 facing away from the DBEF film 700 is connected to a plurality of retaining walls 910, and the inner sidewalls of the retaining walls 910 are connected to a plurality of foam adhesive strips 920. Preferably, the retaining walls 910 connecting the long sides of the middle iron frame 900 are consistent in length with the inner sidewalls of the long sides of the middle iron frame 900, and the foam adhesive strips 920 are composed of two long adhesive strips and two short adhesive strips, the long adhesive strips correspond to the long sides of the middle iron frame 900, and the short adhesive strips correspond to the short sides of the middle iron frame 900, and double-sided adhesive strips 930 are provided on the short adhesive strips to fix the LCD screen.

[0036] The utility model also provides a display device, which includes the display backlight module described in the above embodiment.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these 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 display backlight module, characterized in that: The invention comprises a lower iron frame and a middle iron frame, wherein the middle iron frame is covered on the lower iron frame, and a reflective film, a light guide plate, a lower diffusion film, a lower BEF film, an upper BEF film and a DBEF film are arranged between the lower iron frame and the middle iron frame from bottom to top, an inner side wall of the lower iron frame is connected to an LED light bar through a rubber strip, the LED light bar comprises a plurality of LED lamp beads and a plurality of thermistors, the LED lamp beads are electrically connected to the thermistor and an FPC, the FPC is connected to the bottom of the lower iron frame, and a first limiting column and a plurality of second limiting columns are arranged on a side of the light guide plate facing the lower diffusion film. Two limiting columns, a first limiting groove and a plurality of second limiting grooves are arranged on the lower diffusion membrane, a third limiting groove and a plurality of fourth limiting grooves are arranged on the lower BEF membrane, a fifth limiting groove and a plurality of sixth limiting grooves are arranged on the upper BEF membrane, a seventh limiting groove and a plurality of eighth limiting grooves are arranged on the DBEF membrane, the first limiting groove, the third limiting groove, the fifth limiting groove and the seventh limiting groove are all adapted to the first limiting column, and the second limiting groove, the fourth limiting groove, the sixth limiting groove and the eighth limiting groove are all adapted to the second limiting column.

2. The display backlight module according to claim 1, characterized in that: Film fixing glue is respectively arranged between the light guide plate and the lower diffusion film, between the lower diffusion film and the lower BEF film, between the lower BEF film and the upper BEF film, and between the upper BEF film and the DBEF film.

3. The display backlight module according to claim 2, characterized in that: A matching groove is arranged on the diaphragm fixing adhesive, and the matching groove is adapted to the first limiting column.

4. The display backlight module according to claim 1, characterized in that: The side wall of the light guide plate is concave to form a plurality of matching parts, the matching parts are connected to the silicone parts, and the silicone parts are connected to the middle iron frame on a side facing away from the light guide plate.

5. The display backlight module according to claim 1, characterized in that: The inner side wall of the lower iron frame is connected to the side reflection film, and one side of the side reflection film is connected to the reflection film.

6. The display backlight module according to claim 1, characterized in that: The side of the reflective film facing the light guide plate is connected to a fixing film, and a plurality of air-avoiding grooves are provided on the fixing film, and the air-avoiding grooves are adapted to the LED lamp beads.

7. The display backlight module according to claim 1, characterized in that: A surface of the middle iron frame facing away from the DBEF membrane is connected to a plurality of retaining walls.

8. The display backlight module according to claim 7, characterized in that: The inner side wall of the retaining wall is connected with a plurality of foam rubber strips.

9. The display backlight module according to claim 1, characterized in that: Light-shielding glue is arranged between the middle iron frame and the DBEF film.

10. A display device, characterized in that: It comprises the display backlight module as claimed in any one of claims 1 to 9.

Images