CN211826836U

CN211826836U - Straight following formula backlight unit that diffuser plate installation is stable

Info

Publication number: CN211826836U
Application number: CN202020631079.9U
Authority: CN
Inventors: 刘三妹; 姚志图; 罗增昌; 刘启玉; 彭环洋; 余辉
Original assignee: WAI CHI OPTOELECTRONIC Ltd
Current assignee: WAI CHI OPTOELECTRONIC Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-10-30
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a direct type backlight module with a stably installed diffusion plate, which comprises a lower shell, a direct type light source, a middle frame, a diffusion plate and an upper frame, wherein the direct type light source is fixedly bonded at the bottom of the inner side of the lower shell; the middle frame is arranged in the lower shell and pressed on the direct type light source; the upper frame is fixed on the lower shell; the diffusion plate is supported on the middle frame and clamped between the middle frame and the upper frame. The utility model discloses a straight following formula backlight unit supports the installation diffuser plate through increasing the center to press from both sides the diffuser plate and establish between upper ledge and center, thereby realize the stable installation of diffuser plate in straight following formula backlight unit.

Description

Straight following formula backlight unit that diffuser plate installation is stable

Technical Field

The utility model relates to a backlight technical field, concretely relates to stable straight following formula backlight unit of diffuser plate installation.

Background

The backlight module is a device for providing light source from the back, and can provide light source for a display which can not emit light autonomously, for example, a liquid crystal display. The direct type backlight module is a common backlight module, and the diffuser plate is an important component of the direct type backlight module, i.e. the light emitted from the point light source needs to be scattered to form a surface light source by the diffuser plate, and the diaphragm also needs to be supported by the diffuser plate, so that whether the diffuser plate is installed in the backlight module is stable or not directly affects whether the backlight module can be used normally or not. Present straight following formula backlight unit's diffuser plate generally direct mount is in the inferior valve, but the diffuser plate has certain thickness, and weight ratio is heavier, and the inferior valve generally is stamping forming's metal construction, and simple structure does not install the diffuser plate mounting structure specially to present diffuser plate is not stable enough of installation in general metal inferior valve, influences backlight unit long-term reliability of using.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to not enough in the background art, provide a stable straight following formula backlight unit of diffuser plate installation that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a direct type backlight module with a stably installed diffusion plate comprises a lower shell, a direct type light source, a middle frame, the diffusion plate and an upper frame, wherein the direct type light source is fixedly bonded at the bottom of the inner side of the lower shell; the middle frame is arranged in the lower shell and pressed on the direct type light source; the upper frame is fixed on the lower shell; the diffusion plate is supported on the middle frame and clamped between the middle frame and the upper frame.

Furthermore, bosses are arranged on the periphery of the outer side of the top of the middle frame, the diffusion plate is supported on the top of the middle frame, and the outer side of the diffusion plate is abutted to the inner side of the bosses.

Furthermore, the diffusion plate further comprises L-shaped soft clamping blocks, wherein the L-shaped soft clamping blocks are arranged at four corners of the top of the middle frame, and the L-shaped soft clamping blocks are clamped between the outer sides of the four corners of the diffusion plate and the inner sides of the four corners of the lower shell.

The device further comprises a membrane, wherein the membrane is stacked on the diffusion plate and clamped between the diffusion plate and the upper frame; the diaphragm is installed on the middle frame through the positioning structure.

Furthermore, the positioning structure comprises a first positioning lug on the middle frame and a positioning opening on the membrane, and the first positioning lug is inserted into the positioning opening.

Furthermore, the positioning structure further comprises a second positioning bump on the middle frame and a positioning hole on the membrane, and the second positioning bump is inserted in the positioning hole.

Further, straight following formula light source includes FPC, miniLED and stretches out the end, miniLED welds on FPC, it sets up in the FPC outside to stretch out the end.

Furthermore, the back of the middle frame is provided with an avoiding position, and the extending end extends out of the middle frame from the avoiding position and extends out of the lower shell from the opening on the lower shell.

Furthermore, the middle frame is clamped at the inner side part of the lower shell and is bonded at the bottom of the inner side of the lower shell through a double-sided adhesive tape; the direct type light source is bonded at the bottom of the inner side of the lower shell through a heat conducting double-sided adhesive tape.

Furthermore, an annular soft rubber mat is arranged at the top of the upper frame.

The utility model discloses the beneficial effect who realizes mainly has following several: the diffusion plate of the direct type backlight module is supported on the middle frame and clamped between the middle frame and the upper frame, so that the diffusion plate is installed through the support of the middle frame and can be stably installed in the direct type backlight module through the clamping of the middle frame and the upper frame, and the stability, reliability and visual effect of the backlight module are guaranteed.

Drawings

Fig. 1 is an exploded schematic view of a direct type backlight module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an upper surface of a middle frame of a direct type backlight module according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a lower surface of a middle frame of a direct type backlight module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a diaphragm of a direct type backlight module according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a direct light source of a direct backlight module according to an embodiment of the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 5, a direct type backlight module with a stable diffuser plate installation includes an additional middle frame to support and install the diffuser plate, and the diffuser plate is clamped between the upper frame and the middle frame, so as to realize the stable installation of the diffuser plate in the direct type backlight module. The direct type backlight module comprises a lower shell 1, a direct type light source 2, a middle frame 3, a diffusion plate 4 and an upper frame 5, wherein the lower shell 1 is of a cavity structure with an opening at the upper part, and the direct type light source 2, the middle frame 3 and the diffusion plate 4 are arranged in the cavity; the lower case 1 generally employs a metal member formed by press molding, thereby ensuring strength and heat dissipation performance of the backlight module. The direct type light source 2 is adhered and fixed at the bottom of the inner side of the lower casing 1 and can be adhered at the bottom of the inner side of the lower casing 1 through a heat conducting double-sided adhesive tape 24. The middle frame 3 is arranged in the lower shell 1 and pressed on the direct light source 2, preferably the inner side of the bottom of the middle frame 3 is pressed on the outer side of the direct light source 2, and the direct light source 2 is further pressed and fixed; the outer side of the bottom of the middle frame 3 is contacted with the bottom of the inner side of the lower shell 1, so that the middle frame 3 is convenient to install and fix in the lower shell 1. The upper frame 5 is fixed on the lower shell 1, the diffusion plate 4 is supported on the middle frame 3 and clamped between the middle frame 3 and the upper frame 5, so that the diffusion plate 4 can be stably installed in the direct type backlight module through the support of the middle frame 3 and the clamping of the middle frame 3 and the upper frame 5, and the stability, reliability and visual effect of the backlight module are guaranteed.

Referring to fig. 1 and 2, as a further preferred solution, in order to better fix the diffuser plate 4 in the direct type backlight module, bosses 31 are disposed on the outer sides of the top of the middle frame 3, and are used to limit the diffuser plate 4 around the diffuser plate when the diffuser plate 4 is installed on the top of the middle frame 3, the diffuser plate 4 is supported on the top of the middle frame 3 during installation, and the outer sides of the four sides of the diffuser plate 4 abut against the inner sides of the bosses 31, so that the diffuser plate 4 is stably installed on the middle frame 3, and further, the middle frame 3 and the lower casing 1 are stably installed together, so that the diffuser plate 4 can be stably fixed in the direct type backlight module. The middle frame 3 can be made of injection molded plastic, and the boss 31 can be integrally formed when the middle frame 3 is injection molded.

Referring to fig. 1 and 2, as a further preferred scheme, in order to further fix the diffuser plate 4 in the direct type backlight module better, four L-shaped soft clamping blocks 32 are further provided, the L-shaped soft clamping blocks 32 are disposed at four corners 36 of the top of the middle frame 3 (no boss 31 is disposed at the four corners 36 of the top of the middle frame 3, and an empty space is reserved for mounting the L-shaped soft clamping blocks 32), and the L-shaped soft clamping blocks 32 are clamped between the outer sides of the four corners of the diffuser plate 4 and the inner sides of the four corners of the lower housing 1, so that the diffuser plate 4 is clamped at the inner side of the lower housing 1, and the diffuser plate 4 is further stably fixed in the direct type backlight module. The L-shaped soft clamping blocks 32 can be directly placed on the four corners 36 at the top of the middle frame 3, are not fixed by double faced adhesive tapes and the like, and are directly abutted between the four corners of the lower shell 1 at the outer side and the four corners of the diffusion plate at the inner side; the L-shaped soft latch 32 may be made of soft silicone.

Referring to fig. 1, the middle frame 3 is clamped at the inner side of the lower shell 1, a clamping block can be arranged at the outer side of the middle frame 3, a clamping hole is arranged at the inner side of the lower shell 1, and the middle frame 3 is clamped at the inner side of the lower shell 1 through the matching of the clamping block and the clamping hole; and bond in inferior valve 1 inboard bottom through the double faced adhesive tape, inferior valve 1 inboard bottom bonds together, better fixes together center 3 and inferior valve 1. Inferior valve 1 also the joint together with upper ledge 5 can set up the fixture block in the inferior valve 1 outside, sets up the card hole in 5 inboards of upper ledge, is in the same place inferior valve 1 and 5 joints of upper ledge through the cooperation in fixture block and card hole. In addition, the top of the upper frame 5 is provided with an annular soft rubber pad 51 to facilitate the installation of the subsequent liquid crystal module, and the annular soft rubber pad 51 can be formed by connecting four pieces of foam rubber end to end or can be an integrated annular rubber pad.

Referring to fig. 1, originally, the lighting effect of the backlight module is further improved, and a diaphragm 6 is further provided, wherein the diaphragm 6 is stacked on the diffusion plate 4 and is clamped between the diffusion plate 4 and the upper frame 5; in addition, the diaphragm 6 is also arranged on the middle frame 3 through a positioning structure, so that the diaphragm 6 is stably fixed in the backlight module. The film 6 can adopt the membrane of adding lustre to, diffusion barrier etc. and quantity also can be selected as required, two-layer membrane 6 of adding lustre to about setting up in this embodiment, and upper strata membrane 6 of adding lustre to is folded and is established on lower floor's membrane 6 of adding lustre to.

Referring to fig. 1, 2 and 4, the positioning structure may adopt the following specific structure: the diaphragm positioning device comprises a first positioning lug 33 on the middle frame 3 and a positioning opening 61 on the diaphragm 6, wherein the size of the positioning opening 61 is slightly larger than that of the first positioning lug 33, the position and the shape of the positioning opening 61 are consistent with those of the first positioning lug 33, and the first positioning lug 33 is inserted into the positioning opening 61, so that the positioning and the fixing of the diaphragm 6 on the middle frame 3 are realized. In addition, the positioning structure is preferably further provided with a second positioning bump 34 on the middle frame 3 and a positioning hole 62 on the membrane 6, the size, shape and position of the second positioning bump 34 are consistent with those of the positioning hole 62, and the second positioning bump 34 is inserted into the positioning hole 62. The positioning hole 62 is a closed through hole, and the diaphragm 6 and the middle frame 3 can be stably fixed together by matching the second positioning bump 34 with the positioning hole 62; the positioning opening 61 is an open opening, and the positioning opening 61 and the first positioning bump 33 are matched to enable the diaphragm 6 to have a certain telescopic space on the middle frame 3, so that the diaphragm can adapt to the changing environments such as cold and heat. The positioning openings 61 and the positioning holes 62 are preferably arranged on opposite sides of the membrane 6 to better accommodate the mounting of the membrane on the middle frame.

Referring to fig. 1 and 5, the direct type light source 2 is a direct type light source with a small distance, and includes an FPC21, a miniLED22, and an extending end 23, the miniLED22 is soldered on the FPC21, and the extending end 23 is disposed outside the FPC 21. An avoiding position 35 is arranged on the back surface of the middle frame 3, and the extending end 23 extends out of the middle frame 3 from the avoiding position 35 and extends out of the lower shell 1 from the opening 11 on the lower shell 1, so that the middle frame is connected with an external power supply to supply power to the direct type light source 2; in the avoiding position 35, a soft silicone pad is preferably arranged between the extension end 23 and the middle frame 3, and the extension end 23 is clamped in the avoiding position 35 through the soft silicone pad, so that the extension end 23 is protected. The protruding end 23 protrudes from the opening 11 and is fixed to the back of the lower case 1 by adhesive bonding with a protective adhesive.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a stable straight following formula backlight unit of diffuser plate installation which characterized in that: the LED backlight module comprises a lower shell (1), a direct type light source (2), a middle frame (3), a diffusion plate (4) and an upper frame (5), wherein the direct type light source (2) is fixedly bonded at the bottom of the inner side of the lower shell (1); the middle frame (3) is arranged in the lower shell (1) and pressed on the direct type light source (2); the upper frame (5) is fixed on the lower shell (1); the diffusion plate (4) is supported on the middle frame (3) and is clamped between the middle frame (3) and the upper frame (5).

2. The direct type backlight module with stable installation of the diffusion plate as claimed in claim 1, wherein: bosses (31) are arranged on the periphery of the outer side of the top of the middle frame (3), the diffusion plate (4) is supported on the top of the middle frame (3), and the outer side of the diffusion plate (4) abuts against the inner side of the bosses (31).

3. The direct type backlight module with stable installation of the diffusion plate as claimed in claim 2, wherein: the LED lamp is characterized by further comprising L-shaped soft clamping blocks (32), wherein the L-shaped soft clamping blocks (32) are arranged on four corners (36) at the top of the middle frame (3), and the L-shaped soft clamping blocks (32) are clamped between the outer sides of the four corners of the diffusion plate (4) and the inner sides of the four corners of the lower shell (1).

4. The diffuser plate of any one of claims 1 to 3, wherein the diffuser plate has a stable mounting structure, and the backlight module comprises: the device also comprises a membrane (6), wherein the membrane (6) is overlapped on the diffusion plate (4) and is clamped between the diffusion plate (4) and the upper frame (5); the diaphragm (6) is arranged on the middle frame (3) through a positioning structure.

5. The direct type backlight module with stable installation of the diffusion plate as claimed in claim 4, wherein: the positioning structure comprises a first positioning lug (33) on the middle frame (3) and a positioning opening (61) on the diaphragm (6), and the first positioning lug (33) is inserted into the positioning opening (61).

6. The direct type backlight module with stable installation of the diffusion plate as claimed in claim 5, wherein: the positioning structure further comprises a second positioning lug (34) on the middle frame (3) and a positioning hole (62) on the membrane (6), and the second positioning lug (34) is inserted into the positioning hole (62).

7. The direct type backlight module with stable installation of the diffusion plate as claimed in claim 6, wherein: straight following formula light source (2) include FPC (21), miniLED (22) and stretch out end (23), miniLED (22) welding is on FPC (21), it sets up in FPC (21) outside to stretch out end (23).

8. The direct type backlight module with stable installation of the diffusion plate as claimed in claim 7, wherein: the back of the middle frame (3) is provided with an avoiding position (35), the extending end (23) extends out of the middle frame (3) from the avoiding position (35) and extends out of the lower shell (1) from the opening (11) in the lower shell (1).

9. The direct type backlight module with stable installation of the diffuser plate as claimed in claim 8, wherein: the middle frame (3) is clamped at the inner side part of the lower shell (1) and is bonded at the bottom of the inner side of the lower shell (1) through a double-sided adhesive tape; the direct type light source (2) is adhered to the bottom of the inner side of the lower shell (1) through a heat conducting double-sided adhesive tape (24).

10. The diffuser plate of claim 9, wherein the diffuser plate is mounted stably on a direct type backlight module comprising: the top of the upper frame (5) is provided with an annular soft rubber cushion (51).