CN211826834U

CN211826834U - High-brightness backlight module

Info

Publication number: CN211826834U
Application number: CN202020630826.7U
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 high-brightness backlight module, which comprises a back plate, a direct type light source, a lower shell, a diffusion plate and a middle frame, wherein the lower shell is provided with an opening which is communicated up and down; the direct type light source is clamped between the lower shell and the back plate and is arranged at an opening at the lower side of the lower shell; the diffusion plate is clamped between the lower shell and the middle frame and is arranged at an opening at the upper side of the lower shell; the back plate is an aluminum plate, and a heat dissipation block is arranged on the back plate; the direct type light source comprises a lamp panel and a reflecting device, and the reflecting device is arranged on the lamp panel. The utility model discloses a backlight unit is through adopting the powerful high bright LED lamp of height to set up the reflex reflector on the LED lamp and come gathering more to backlight unit's the place ahead of light that the LED lamp sent, improve backlight unit's luminance from this.

Description

High-brightness backlight module

Technical Field

The utility model relates to a backlight technical field, concretely relates to backlight unit of hi-lite.

Background

Backlight unit provides the part of light source for display device or instrument and meter from the back, just can normally show the picture through backlight display device, and the instrument and meter can normally watch the use. Some display devices or instruments and meters need high brightness and can meet the requirement only through a high-brightness backlight module. To realize high-brightness light emission of the backlight module, on one hand, a light source with higher power is adopted, and the heat dissipation problem of the high-power light source needs to be considered at the moment; on the other hand, the light emitted by the light source can be collected to the front of the backlight module to improve the brightness of the front of the backlight module, but the general backlight module adopts a simple reflective film to reflect the light emitted by the light source to the front of the backlight module, so that the light emitted by the light source cannot be collected to the front of the backlight module.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to not enough in the background art, provide the backlight unit of hi-lite that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a high-brightness backlight module comprises a back plate, a direct type light source, a lower shell, a diffusion plate and a middle frame, wherein the lower shell is provided with an opening communicated up and down; the direct type light source is clamped between the lower shell and the back plate and is arranged at an opening at the lower side of the lower shell; the diffusion plate is clamped between the lower shell and the middle frame and is arranged at an opening at the upper side of the lower shell; the back plate is an aluminum plate, and a heat dissipation block is arranged on the back plate; the direct type light source comprises a lamp panel and a reflecting device, and the reflecting device is arranged on the lamp panel.

Furthermore, the heat dissipation block is arranged on one side of the back plate, and a plurality of heat dissipation fins are arranged on the outer side of the heat dissipation block.

Further, the lamp plate bonds on the backplate through heat-conducting glue, reflector folds and establishes on the lamp plate to lamp plate and reflector all press from both sides and establish between inferior valve and backplate.

Further, all be provided with the screw of looks adaptation on backplate, lamp plate, reflex reflector and the inferior valve, backplate, lamp plate, reflex reflector and inferior valve pass through screw or bolt fastening together.

Further, be provided with a plurality of LED lamps on the lamp plate, reflex reflector includes a plurality of anti-light cup, each all set up a anti-light cup on the LED lamp.

Further, a supporting step is provided on the upper side of the lower case, and the diffusion plate is supported on the supporting step.

Furthermore, the upper frame is fixed on the lower shell, and the middle frame is pressed and fixed on the supporting step.

Furthermore, an annular soft rubber mat is further arranged on the middle frame.

The utility model discloses the beneficial effect who realizes mainly has following several: the back plate of the backlight module adopts the aluminum plate with better heat dissipation performance, and the heat dissipation block is arranged on the back plate, so that the heat dissipation requirement of the LED lamp when the high-power high-brightness LED lamp is adopted is met, and the stability, the reliability and the service life of the backlight module in long-time use are guaranteed while the backlight module realizes high-brightness luminescence. The direct type light source comprises a lamp plate and a reflecting device, the reflecting device is arranged on the lamp plate, and the reflecting device can reflect light emitted by the LED lamps on the lamp plate to the front of the backlight module, so that the brightness of the backlight module is further improved.

Drawings

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

fig. 2 is a schematic structural view illustrating a back plate, a direct light source, a lower case and a diffusion plate of a backlight module according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a light reflecting device of a backlight module according to an embodiment of the present invention;

fig. 4 is a schematic view of a longitudinal cross-sectional structure of a center of a reflective cup of a reflective device of a backlight module according to an embodiment of the present invention;

fig. 5 is a schematic structural view illustrating a backlight module according to an embodiment of the present invention when a lower case is placed right side by side;

fig. 6 is a schematic structural view illustrating a case of the 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 6, a high-brightness backlight module adopts a high-power high-brightness LED lamp, and a light reflecting device is disposed on the LED lamp to concentrate more light emitted from the LED lamp to the front of the backlight module, thereby improving the brightness of the backlight module.

Referring to fig. 1 to 6, the backlight module includes a back plate 1, a direct light source 2, a lower case 3, a diffusion plate 4 and a middle frame 5. The backboard 1 is made of aluminum plates with good heat dissipation performance, and the heat dissipation block 11 is arranged on the backboard 1, so that the heat dissipation requirement of the LED lamp when a high-power high-brightness LED lamp is adopted is met, and the stability, the reliability and the service life of the backlight module for long-time use are guaranteed while the backlight module is high-brightness light emitting. Lower casing 3 is provided with communicating opening from top to bottom, and diffuser plate 4 and straight following formula light source 2 are installed respectively to communicating opening from top to bottom, and communicating opening from top to bottom makes the light that straight following formula light source 2 sent can shine to lower casing 3 upside by lower casing 3 downside to it is even to diffuse through diffuser plate 4 of lower casing 3 upside. Straight following formula light source 2 includes lamp plate 21 and reflex reflector 22, reflex reflector 22 sets up on lamp plate 21, can be with more reflection of the light that LED lamp sent on lamp plate 21 to backlight unit's the place ahead to further improve backlight unit's luminance. The lower shell 3 is fixed on the back plate 1, and the direct type light source 2 is clamped between the lower shell 3 and the back plate 1 and is arranged at an opening at the lower side of the lower shell 3; so that the direct type light source 2 can be stably installed at the lower opening of the back plate 1 through the lower case 3 and the back plate 1. The middle frame 5 is arranged on the lower shell 3, and the diffusion plate 4 is clamped between the lower shell 3 and the middle frame 5 and is arranged at the opening at the upper side of the lower shell 3; so that the diffusion plate 4 can be stably installed at the upper opening of the lower case 3 through the lower case 3 and the middle frame 5.

Referring to fig. 1, inferior valve 3 can adopt injection moulding's plastic part, only sets up diffuser plate 4 in this embodiment, does not adopt membrane frameworks such as membrane of adding lustre to, diffusion barrier, therefore with the higher of inferior valve 3's height setting for the light that straight following formula light source 2 sent has sufficient distance scattering even in inferior valve 3, makes the light that reaches diffuser plate 4 will be more even, thereby guarantees the luminous visual effect of backlight unit. The middle frame 5 may also be made of injection molded plastic.

Referring to fig. 1 and 2, as a further preferred scheme, the heat dissipation block 11 is disposed at one side of the back plate 1, and is disposed in parallel with the integral structure formed by the direct light source 2 and the lower case 3, so that the heat dissipation block 11 is not disposed at the back of the back plate 1, thereby reducing the thickness of the backlight module. In addition, a plurality of heat dissipation fins 111 are arranged on the outer side of the heat dissipation block 11, so that the heat dissipation area is increased through the heat dissipation fins, the heat dissipation effect is enhanced, and the brightness of the backlight module can be improved by adopting a high-power high-brightness LED lamp. The heat dissipation block 11 and the back plate 1 can be made of an integrally formed aluminum casting, and the area of the back plate 1 can be larger than that of the direct type light source 2, so that the heat dissipation performance is enhanced.

Referring to fig. 1, in order to further enhance the heat dissipation performance of the backlight module when the high-brightness LED lamp is used, the lamp panel 21 is bonded on the back plate 1 through the heat conducting glue 23, so that the heat transfer efficiency between the lamp panel 21 and the back plate is higher, the heat emitted by the lamp panel 21 can be rapidly transmitted to the back plate 1 through the heat conducting glue 23, and then transmitted to the heat dissipation block 11 through the back plate 1, and finally, the heat is dissipated to the air through the heat dissipation block 11. The heat conductive adhesive 23 may be a commercially available double-sided adhesive.

Referring to fig. 1 to 6, the light reflecting device 22 is stacked on the lamp panel 21, and the lamp panel 21 and the light reflecting device 22 are both clamped between the lower shell 3 and the back panel 1, so that the light reflecting device 22 of the direct type light source 2 and the lamp panel 21 can be fixed on the back panel 1. Specifically, the back plate 1, the lamp panel 21, the light reflecting device 22 and the lower shell 3 may be provided with screw holes 7 which are matched with each other, the back plate 1, the lamp panel 21, the light reflecting device 22 and the lower shell 3 are fixed together by screws or bolts, for example, in this embodiment, three screw holes are provided in the back plate 1, the lamp panel 21, the light reflecting device 22 and the lower shell 3, and finally the back plate 1, the lamp panel 21, the light reflecting device 22 and the lower shell 3 are fixed together by three screws or bolts; the backlight module with the fixing structure is convenient to assemble and reliable and stable.

Referring to fig. 1, 3 and 4, the lamp panel 21 may have the following structure: a plurality of LED lamps 211 are welded on the PCB, each LED lamp 211 is communicated through a circuit in the PCB, and the lamp panel 21 can be lightened by connecting the PCB to a power supply; the arrangement of the LED lamps 211 on the PCB board can be selected according to actual needs, and generally, a matrix arrangement can be adopted. The reflector 22 includes a plurality of reflective cups 221, each of the LED lamps 211 has a reflective cup 221, and each of the reflective cups 221 reflects light emitted from one of the LED lamps 211 to the front of the backlight module. The reflecting cup 221 of the reflector 22 is matched with the LED lamp 211 of the lamp panel 21, and the size and arrangement of the reflecting cup can be adapted to the LED lamp 211 on the lamp panel 21. The interior of the reflective cup 221 is preferably configured as a bowl-shaped structure as shown in fig. 4, and the LED lamp 211 is disposed at an opening with a smaller opening of the bowl-shaped structure, so that the light emitted by the LED lamp 211 can be reflected more to the front of the backlight module by the reflective cover of the structure, thereby improving the brightness of the front of the backlight module. In addition, the upper surface of the lamp panel 21 and the inner surface of the reflector cup 221 are preferably coated with a reflective material, such as chrome, to further improve the reflectivity of the light emitted from the LED lamp 211.

Referring to fig. 1, 2 and 5, as a further preferred solution, the upper side of the lower case 3 is preferably provided with a supporting step 31, and the diffuser plate 4 is supported on the supporting step 31, thereby facilitating the installation of the diffuser plate 4 on the lower case 3. In addition, an upper frame 6 can be further arranged, the upper frame 6 can be clamped and fixed above the lower shell 3 through a clamping structure and pressed on the outer side of the middle frame 5, and therefore the middle frame 5 is pressed and fixed on the supporting step 31; and the diffuser plate 4 is pressed under the middle frame 5, so that the diffuser plate 4 can be fixed between the lower case 3 and the middle frame 5 by the fixation of the upper frame 6 and the lower case 3. Meanwhile, a space can be reserved between the upper frame 6 and the middle frame 5 for installing the liquid crystal display module, and the liquid crystal display module is clamped and fixed through the upper frame 6 and the middle frame 5; the middle frame 5 is preferably provided with an annular soft rubber pad 51 for supporting and protecting the liquid crystal display module. The ring-shaped soft rubber pad 51 may be formed of a plurality of pieces of foam rubber spliced together.

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 backlight unit of hi-lite which characterized in that: the LED backlight module comprises a back plate (1), a direct type light source (2), a lower shell (3), a diffusion plate (4) and a middle frame (5), wherein the lower shell (3) is provided with an opening which is communicated up and down; the lower shell (3) is fixed on the back plate (1), and the direct type light source (2) is clamped between the lower shell (3) and the back plate (1) and is arranged at an opening at the lower side of the lower shell (3); the middle frame (5) is arranged on the lower shell (3), and the diffusion plate (4) is clamped between the lower shell (3) and the middle frame (5) and is arranged at an opening on the upper side of the lower shell (3); the back plate (1) is an aluminum plate, and a heat dissipation block (11) is arranged on the back plate (1); straight following formula light source (2) include lamp plate (21) and reflex reflector (22), reflex reflector (22) set up on lamp plate (21).

2. A high brightness backlight module according to claim 1, wherein: the heat dissipation block (11) is arranged on one side of the back plate (1), and a plurality of heat dissipation fins (111) are arranged on the outer side of the heat dissipation block (11).

3. A high brightness backlight module according to claim 1, wherein: the lamp plate (21) is bonded on the backboard (1) through the heat conducting glue (23), the reflecting device (22) is overlapped on the lamp plate (21), and the lamp plate (21) and the reflecting device (22) are both clamped between the lower shell (3) and the backboard (1).

4. A high brightness backlight module according to claim 3, wherein: screw (7) that all are provided with the looks adaptation on backplate (1), lamp plate (21), reflex reflector (22) and inferior valve (3), backplate (1), lamp plate (21), reflex reflector (22) and inferior valve (3) are in the same place through screw or bolt fastening.

5. A high brightness backlight module according to claim 1, wherein: the LED lamp is characterized in that a plurality of LED lamps (211) are arranged on the lamp panel (21), the reflecting device (22) comprises a plurality of reflecting cups (221), and each LED lamp (211) is provided with one reflecting cup (221).

6. A high brightness backlight module according to any one of claims 1 to 5, wherein: the upper side of the lower shell (3) is provided with a supporting step (31), and the diffusion plate (4) is supported on the supporting step (31).

7. A high brightness backlight module according to claim 6, wherein: the upper frame (6) is fixed on the lower shell (3), and the middle frame (5) is pressed and fixed on the supporting step (31).

8. A high brightness backlight module according to claim 7, wherein: the middle frame (5) is also provided with an annular soft rubber cushion (51).