CN219574551U - Curved surface Local dimming backlight module - Google Patents

Abstract

The utility model discloses a curved surface Local dimming backlight module which comprises a back plate, a lamp plate, a reflecting shade, an optical film plate component and a fixing frame, wherein the lamp plate is fixedly adhered in the back plate through heat conduction glue; the lamp panel comprises a plurality of light emitting areas which are used for adjusting light independently, a plurality of light sources are arranged in each light emitting area, a plurality of light reflecting cups are arranged on the light reflecting cover, each light source is matched with each light reflecting cup, and a light source is arranged in each light reflecting cup; the reflector is provided with a first fixing mechanism, a second fixing mechanism is arranged on the backboard, the first fixing mechanism is matched with the second fixing mechanism, and the reflector is fixed in the backboard through the first fixing mechanism and the second fixing mechanism. The utility model is used for the backlight source of the display.

Description

Curved surface Local dimming backlight module

Technical Field

The utility model relates to the technical field of backlight modules, in particular to a curved surface Local dimming backlight module.

Background

The display is an electrical device commonly used in life and work, such as a computer display, a mobile phone, a television and the like, the current display is generally a liquid crystal display, the liquid crystal display needs to be provided with a backlight module as a backlight source of a liquid crystal display screen, the current display has higher requirements on display performance such as contrast and the like, and the use experience is optimized by adopting a curved surface display, so that the backlight source of the current display usually adopts a Local dimming backlight module (namely a regional light control backlight module). In order to optimize the regional light control effect, the direct type backlight module is generally provided with a reflector to divide each light source on the backboard into independent light emitting units, but the reflector of the current Local dimming backlight module is generally directly placed in the backboard, no special structure is arranged to fix the reflector in the backboard, the stability of the reflector of the Local dimming backlight module installed in the backboard is poor, the reflector easily moves in the backboard to influence the light emitting visual effect of the Local dimming backlight module, for example, the reflector in the direct type backlight module with reflector of patent document CN201920062881.8 is directly placed in the backboard, no special structure is arranged to fix the reflector in the backboard, the stability of the reflector installed in the backboard is poor, and the position of the reflector easily moves in the backboard to influence the light emitting visual effect of the direct type backlight module.

Disclosure of Invention

The utility model provides a curved surface Local dimming backlight module which aims at solving the technical problems that a reflector of a current Local dimming backlight module is directly placed in a back plate, a special structure is not arranged for fixing the reflector in the back plate, the stability of the installation of the reflector in the back plate is poor, and the reflector is easy to move in the back plate, so that the luminous visual effect of the direct type backlight module is affected.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the curved surface Local dimming backlight module comprises a back plate, a lamp plate, a reflecting cover, an optical film plate component and a fixing frame, wherein the lamp plate is fixedly adhered in the back plate through heat conduction glue, the reflecting cover is adhered on the lamp plate through fixing glue, the optical film plate component is arranged on the reflecting cover, and the lamp plate, the reflecting cover and the optical film plate component are pressed and fixed in the back plate through the fixing frame; the lamp panel comprises a plurality of light emitting areas which are used for adjusting light independently, a plurality of light sources are arranged in each light emitting area, a plurality of light reflecting cups are arranged on the light reflecting cover, each light source is matched with each light reflecting cup, and a light source is arranged in each light reflecting cup; the reflector is provided with a first fixing mechanism, a second fixing mechanism is arranged on the backboard, the first fixing mechanism is matched with the second fixing mechanism, and the reflector is fixed in the backboard through the first fixing mechanism and the second fixing mechanism.

Further, the first fixing mechanism on the reflector comprises a first limiting insert block, the second fixing mechanism on the backboard comprises a first limiting slot, the first limiting insert block is matched with the first limiting slot, and the first limiting insert block is inserted into the first limiting slot.

Further, the first fixing mechanism on the reflector further comprises a first fixing clamping block, the second fixing mechanism on the backboard further comprises a first fixing clamping groove, the first fixing clamping block is matched with the first fixing clamping groove, and the first fixing clamping block is clamped in the first fixing clamping groove.

Further, a second limiting inserting groove is formed in the back plate, a second limiting inserting block is arranged on the fixing frame, the second limiting inserting groove is matched with the second limiting inserting block, and the second limiting inserting block is adhered in the second limiting inserting groove through first double-sided adhesive tape.

Further, the backboard is further provided with a second fixing clamping groove, the fixing frame is further provided with a second fixing clamping block, the second fixing clamping groove is matched with the second fixing clamping block, and the second fixing clamping block is clamped in the second fixing clamping groove.

Further, still be provided with the spacing slot of third on the backplate, be provided with the fixed fixture block of third in the spacing slot of third, be provided with the spacing cartridge of third on the fixed frame, be provided with the fixed draw-in groove of third on the spacing cartridge of third, the spacing slot of third and the fixed cartridge looks adaptation of third, the fixed fixture block of third and the fixed draw-in groove looks adaptation of third, the spacing cartridge of third is pegged graft in the spacing slot of third, the fixed fixture block joint of third is in the fixed draw-in groove of third.

Further, the optical film plate component comprises a diffusion plate, a light-diffusing film, a brightness enhancement film and a DBEF film, and the diffusion plate, the light-diffusing film, the brightness enhancement film and the DBEF film are sequentially overlapped on the reflector; the diffusion plate, the light scattering film, the light intensifying film and the DBEF film are all provided with fourth limiting inserting blocks, the back plate is provided with fourth limiting inserting grooves, the fourth limiting inserting blocks are matched with the fourth limiting inserting grooves, and the fourth limiting inserting blocks are inserted into the fourth limiting inserting grooves.

Further, limiting openings are formed in the diffusion plate, the light scattering film, the light intensifying film and the DBEF film, limiting columns are arranged on the back plate, the limiting openings are matched with the limiting columns, and the limiting columns are inserted into the limiting openings.

Further, the device also comprises a diffusion plate fixing clamping block, and the diffusion plate is clamped and fixed in the back plate through the diffusion plate fixing clamping block.

Further, the diffusion plate is adhered and fixed on the back plate through a second double-sided adhesive, and the diffusion plate is adhered and fixed with the light diffusion film, the light intensifying film and the DBEF film through a third double-sided adhesive.

The beneficial effects achieved by the utility model mainly comprise the following points: the curved surface Local dimming backlight module comprises a back plate, a lamp panel and a reflecting shade, wherein the lamp panel comprises a plurality of light-emitting areas which are independently dimmed, so that the brightness of each light-emitting area can be respectively adjusted to different brightness, and the display performance such as the contrast ratio of a liquid crystal display using the backlight module is improved. Each luminous area is provided with a plurality of light sources, the reflecting cover is provided with a plurality of reflecting cups, each reflecting cup is respectively provided with one light source, each light source on the lamp panel can be separated into independent light sources through the reflecting cup of the reflecting cover, the mutual influence among the light sources is avoided, and the regional light control effect of the backlight module is optimized; and the reflector can fully reflect light emitted by the light source on the lamp panel to the front of the backlight module, so that the efficiency and the brightness of the backlight module are improved. The reflector is provided with first fixed establishment, be provided with second fixed establishment on the backplate, the reflector passes through first fixed establishment stable fixed on the second fixed establishment of backplate, and the stability of reflector installation is good in the backplate, is difficult to the internal shift position of backplate to guarantee the luminous visual effect of curved surface Local dimming backlight unit.

Drawings

Fig. 1 is an exploded view of a curved Local dimming backlight module according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a back plate of a curved Local dimming backlight module according to an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of the portion A in FIG. 2;

FIG. 4 is an enlarged schematic view of the portion B in FIG. 2;

FIG. 5 is a schematic view of a reflector of a curved Local dimming backlight module according to an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the portion C in FIG. 5;

fig. 7 is a schematic structural diagram of a fixing frame of a curved Local dimming backlight module according to an embodiment of the present utility model;

FIG. 8 is an enlarged schematic view of the portion D in FIG. 7;

FIG. 9 is a schematic view of a diffuser plate of a curved Local dimming backlight module according to an embodiment of the present utility model;

fig. 10 is a schematic structural diagram of a curved Local dimming backlight module light-diffusing film, a brightness enhancement film and a DBEF film according to an embodiment of the present utility model.

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated 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 components; the terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present patent.

Detailed Description

For the purposes of explanation, numerous practical details are set forth in the following description, taken in conjunction with the accompanying drawings, to facilitate understanding of those of skill in the art. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. In addition, for ease of understanding, some well known and conventional structures and components are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture such as that shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly. The use of terms such as "comprising," "including," "having," and variations thereof herein, are intended to encompass the elements listed thereafter and equivalents thereof as well as additional elements. Unless otherwise indicated, terms such as "mounted," "connected," "supported," and "coupled" and variations thereof are used in the broadest sense and encompass both direct and indirect combinations, connections, supports, and couplings. Furthermore, the terms "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

The description herein as relating to "first," "second," etc. is for descriptive purposes only and is not intended to specifically refer to order or sequence nor to limit the utility model, but is merely intended to distinguish between components or operations that are described in the same technical term and is not to be interpreted as indicating or implying a relative importance or implying any particular order of number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Example 1

Referring to fig. 1 to 10, a curved surface Local dimming backlight module comprises a back plate 1, a lamp panel 2, a reflector 3, an optical film plate component 4 and a fixing frame 5, wherein the back plate 1 is a structure for installing the lamp panel 2, the reflector 3 and the optical film plate component 4, the fixing frame 5 is a structure for fixing the lamp panel 2, the reflector 3 and the optical film plate component 4, the lamp panel 2, the reflector 3 and the optical film plate component 4 are installed in an installation cavity of the back plate 1, and the optical film plate component 4 is pressed and fixed in the back plate 1 through the fixing frame 5, so that an integral direct type backlight module is formed. The backboard 1 adopts die casting, and the fixed frame 5 adopts a metal frame formed by stamping or a plastic frame formed by injection molding.

Referring to fig. 1, the lamp panel 2 is adhered and fixed in the back plate 1 by the heat-conducting glue 21, so that the lamp panel 2 can be fixed in the back plate 1, and heat generated when the lamp panel 2 is lighted can be dissipated to the back plate 1. The heat conductive adhesive 21 is preferably a heat conductive double sided adhesive. The reflector 3 is adhered to the lamp panel 2 through the fixing glue 33, so that the reflector 3 and the lamp panel 2 are fixed together, and light emitted by a light source on the lamp panel 2 is reflected to the front face of the backlight module through the reflector 3. The fixing adhesive 33 is a double sided adhesive. The optical film plate component 4 is arranged on the reflecting shade 3, and further homogenizes the light reflected by the reflecting shade 3 to form the backlight module with uniform light emission.

Referring to fig. 1 to 3 and 5, the lamp panel 2 includes a plurality of light emitting areas with independent dimming, so that the brightness of each light emitting area can be respectively adjusted to different brightness, and the contrast ratio and other display performances of the liquid crystal display using the backlight module are improved. Each light-emitting area is provided with a plurality of light sources, the reflector 3 is provided with a plurality of light-reflecting cups, each light source is matched with the corresponding light-reflecting cup, namely, the positions and the numbers of the light sources on the lamp panel 2 are consistent with those of the light-reflecting cups on the reflector 3, so that each light source is just contained in each light-reflecting cup, each light source on the lamp panel 2 can be separated into independent light sources through the light-reflecting cup of the reflector 3, the mutual influence among the light sources is avoided, and the regional light control effect of the backlight module is optimized; and the light emitted by the light source on the lamp panel 2 can be fully reflected to the front of the backlight module, so that the efficiency and the brightness of the backlight module are improved. The reflector 3 is provided with a first fixing mechanism, a second fixing mechanism is arranged on the back plate 1, the first fixing mechanism is matched with the second fixing mechanism, the reflector 3 is stably fixed on the second fixing mechanism of the back plate 1 through the first fixing mechanism, the reflector 3 is good in stability in installation in the back plate 1 and is not easy to move in the back plate, and therefore the luminous visual effect of the direct type backlight module is guaranteed.

Referring to fig. 2, 3, 5 and 6, the first fixing mechanism on the reflector 3 includes a first limiting insert block 31, the second fixing mechanism on the back plate 1 includes a first limiting insert groove 11, the first limiting insert block 31 is adapted to the first limiting insert groove 11, that is, the number, position and size of the first limiting insert block 31 are consistent with those of the first limiting insert groove 11, so that the first limiting insert block 31 can be just inserted into the first limiting insert groove 11, and the installation of the reflector 3 on the back plate 1 is limited. The first limiting insert 31 and the first limiting slot 11 are preferably disposed on each side of the backlight module.

Referring to fig. 2, 3, 5 and 6, the first fixing mechanism on the reflector 3 further includes a first fixing clamping block 32, the second fixing mechanism on the back plate 1 further includes a first fixing clamping groove 12, and the first fixing clamping block 32 is matched with the first fixing clamping groove 12, that is, the number, the position and the size of the first fixing clamping blocks 32 are consistent with those of the first fixing clamping grooves 12, so that the first fixing clamping blocks 32 can be just clamped in the first fixing clamping grooves 12, the reflector 3 is fixed on the back plate 1, and the stability of installation and fixation of the reflector 3 on the back plate 1 is further improved.

Referring to fig. 1 to 10, when the curved surface Local dimming backlight module of the present embodiment is assembled, the lamp panel 2 is adhered and fixed in the back plate 1 by the heat-conducting glue 21; the reflector 3 is adhered to the lamp panel 2 through the fixing glue 33, is spliced and fixed in the first limiting slot 11 through the first limiting insert block 31, and is clamped in the first fixing clamping groove 12 through the first fixing clamping block 32; the optical diaphragm plate assembly 4 is arranged above the reflecting cover 3, and the fixed frame 5 is fixed on the back plate 1, so that the back plate 1, the lamp panel 2, the reflecting cover 3, the optical diaphragm plate assembly 4 and the fixed frame 5 are arranged into an integral curved surface Local dimming backlight module. When the curved surface Local dimming backlight module is used, the curved surface Local dimming backlight module is arranged on the back surface of the liquid crystal display screen and used as a backlight source of the liquid crystal display screen.

Example two

Referring to fig. 1 to 10, the curved surface Local dimming backlight module in this embodiment is the same as the first embodiment, and the mounting structure of the fixing frame 5 and the back plate 1 is optimized and improved based on the first embodiment, and the same point of this embodiment as the first embodiment is the first embodiment, and the improvement will be further described.

Referring to fig. 1 to 4, 7 and 8, the upper side of the back plate 1 is provided with a second limiting slot 13, the outer side of the fixed frame 5 is provided with a second limiting insert block 51, the second limiting slot 13 is matched with the second limiting insert block 51, that is, the size, position and number of the second limiting slot 13 are consistent with those of the second limiting insert block 51, so that the second limiting insert block 51 can be just inserted into the second limiting slot 13. In addition, the second limiting insert 51 is adhered to the second limiting slot 13 by the first double sided adhesive tape 511, so as to further adhere and fix the fixing frame 5 and the back plate 1 together. In addition, the fixing frame 5 and the backboard 1 can be adhered and fixed together through the edge-covering glue.

Referring to fig. 1 to 4, 7 and 8, the inner side wall of the back plate 1 is further provided with a second fixing slot 14, the outer side of the fixing frame 5 is further provided with a second fixing block 52, the second fixing slot 14 is matched with the second fixing block 52, that is, the size, the position and the number of the second fixing slots 14 are consistent with those of the second fixing block 52, so that the second fixing block 52 can be just clamped in the second fixing slot 14, and the fixing frame 5 is further clamped and fixed on the inner side of the back plate 1, and the outer scraping of the fixing frame 5 is avoided.

Referring to fig. 1 to 4, 7 and 8, a third limiting slot 15 is further provided on the outer sidewall of the back plate 1, a third limiting insert 53 is provided on the outer side of the fixed frame 5, and the third limiting slot 15 is adapted to the third limiting insert 53, that is, the size, position and number of the third limiting slots 15 are consistent with those of the third limiting insert 53, so that the third limiting insert 53 can be just inserted into the third limiting slot 15. The third limiting slot 15 is internally provided with a third fixing clamping block 16, the third limiting insert block 53 is provided with a third fixing clamping groove 54, and the third fixing clamping block 16 is matched with the third fixing clamping groove 54, that is, the size, the position and the number of the third fixing clamping block 16 are consistent with those of the third fixing clamping groove 54, so that the third fixing clamping block 16 can be just clamped in the third fixing clamping groove 54, and the fixing frame 5 and the backboard 1 are fixed together.

The second limiting inserting groove 13 and the second fixing clamping groove 14 are formed in the inner side walls of the three sides of the backboard 1, and the second limiting inserting block 51 and the second fixing clamping block 52 are arranged on the outer sides of the three sides of the fixing frame 5, so that the three sides of the fixing frame 5 are fixed in the second limiting inserting groove 13 and the second fixing clamping groove 14 of the three sides of the backboard 1 through the second limiting inserting block 51 and the second fixing clamping block 52. The third limiting inserting groove 15 and the third fixing clamping block 16 are arranged on the outer side wall of the other side edge of the back plate 1, and the third limiting inserting block 53 and the third fixing clamping groove 54 are arranged on the outer side of the other side edge of the fixing frame 5, so that the other side edge of the fixing frame 5 is fixed on the third limiting inserting groove 15 and the third fixing clamping block 16 of the other side edge of the back plate 1 through the third limiting inserting block 53 and the third fixing clamping groove 54.

Referring to fig. 1 to 10, when the curved surface Local dimming backlight module of the present embodiment is assembled, the lamp panel 2 is adhered and fixed in the back plate 1 by the heat-conducting glue 21; the reflector 3 is adhered to the lamp panel 2 through the fixing glue 33, is spliced and fixed in the first limiting slot 11 through the first limiting insert block 31, and is clamped in the first fixing clamping groove 12 through the first fixing clamping block 32; the optical diaphragm plate assembly 4 is arranged above the reflecting cover 3; the three sides of the fixed frame 5 are fixed in the second limiting inserting grooves 13 and the second fixing clamping grooves 14 on the three sides of the backboard 1 through the second limiting inserting blocks 51 and the second fixing clamping blocks 52, and the other side of the fixed frame 5 is fixed on the third limiting inserting grooves 15 and the third fixing clamping blocks 16 on the other side of the backboard 1 through the third limiting inserting blocks 53 and the third fixing clamping grooves 54; thereby the back plate 1, the lamp panel 2, the reflecting shade 3, the optical film plate component 4 and the fixed frame 5 are assembled into an integral curved surface Local dimming backlight module. When the curved surface Local dimming backlight module is used, the curved surface Local dimming backlight module is arranged on the back surface of the liquid crystal display screen and used as a backlight source of the liquid crystal display screen.

Example III

Referring to fig. 1 to 10, the curved surface Local dimming backlight module in this embodiment is the same as that in the embodiment, and the structure of the optical film plate assembly 4 and its installation on the back plate 1 are further improved based on the second embodiment, and the same points as those in the second embodiment are referred to in the embodiment, and the improvement is further described below.

Referring to fig. 1, the optical film plate assembly 4 includes a diffusion plate 41, a light diffusing film 42, a brightness enhancement film 43 and a DBEF film 44, and the diffusion plate 41, the light diffusing film 42, the brightness enhancement film 43 and the DBEF film 44 are sequentially stacked on the reflector 3.

Referring to fig. 1 to 3, 9 and 10, the diffusion plate 41, the light-diffusing film 42, the light-intensifying film 43 and the DBEF film 44 are all provided with a fourth spacing insert 45, the back plate 1 is provided with a fourth spacing slot 17, the fourth spacing insert 45 is matched with the fourth spacing slot 17, i.e. the position, the size and the number of the fourth spacing insert 45 are consistent with those of the fourth spacing slot 17, so that the fourth spacing insert 45 is just inserted into the fourth spacing slot 17 to fix the diffusion plate 41, the light-diffusing film 42, the light-intensifying film 43 and the DBEF film 44 on the back plate 1.

Referring to fig. 1 to 3, 9 and 10, the diffusion plate 41, the light-diffusing film 42, the light-intensifying film 43 and the DBEF film 44 are provided with limiting openings 46, the back plate 1 is provided with limiting posts 18, and the limiting openings 46 are matched with the limiting posts 18, that is, the positions, sizes and numbers of the limiting openings 46 are consistent with those of the limiting posts 18, so that the limiting posts 18 are just inserted into the limiting openings 46, and the diffusion plate 41, the light-diffusing film 42, the light-intensifying film 43 and the DBEF film 44 are positioned and mounted on the back plate 1. A notch may be provided as a limiting opening 46 outside the diffusion plate 41, the diffusion film 42, the brightness enhancement film 43, and the DBEF film 44.

Referring to fig. 1 to 3, 9 and 10, a diffuser plate fixing block 412 is further provided, and the diffuser plate 41 is fastened in the installation cavity of the back plate 1 through the diffuser plate fixing block 412; the diffuser plate fixing block 412 may be a silica gel block.

Referring to fig. 1, the diffusion plate 41 is adhered and fixed to the back plate 1 by the second double-sided adhesive 411, and the diffusion plate 41 and the diffusion film 42, the diffusion film 42 and the intensifying film 43, and the intensifying film 43 and the DBEF film 44 are adhered and fixed together by the third double-sided adhesive 421, so that the diffusion plate 41, the diffusion film 42, the intensifying film 43, and the DBEF film 44 can be adhered and integrated, and the stability of the diffusion plate 41, the diffusion film 42, the intensifying film 43, and the DBEF film 44 mounted on the back plate 1 can be improved.

Referring to fig. 1 to 10, when the curved surface Local dimming backlight module of the present embodiment is assembled, the lamp panel 2 is adhered and fixed in the back plate 1 by the heat-conducting glue 21; the reflector 3 is adhered to the lamp panel 2 through the fixing glue 33, is spliced and fixed in the first limiting slot 11 through the first limiting insert block 31, and is clamped in the first fixing clamping groove 12 through the first fixing clamping block 32; the diffusion plate 41, the light diffusion film 42, the light enhancement film 43 and the DBEF film 44 of the optical film plate assembly 4 are sequentially overlapped on the reflector 3, are inserted into the fourth limiting inserting groove 17 through the fourth limiting inserting block 45, are inserted into the limiting opening 46 through the limiting column 18, and are adhered and fixed together through the second double-sided adhesive 411 and the third double-sided adhesive 421; the three sides of the fixed frame 5 are fixed in the second limiting inserting grooves 13 and the second fixing clamping grooves 14 on the three sides of the backboard 1 through the second limiting inserting blocks 51 and the second fixing clamping blocks 52, and the other side of the fixed frame 5 is fixed on the third limiting inserting grooves 15 and the third fixing clamping blocks 16 on the other side of the backboard 1 through the third limiting inserting blocks 53 and the third fixing clamping grooves 54; thereby the back plate 1, the lamp panel 2, the reflecting shade 3, the optical film plate component 4 and the fixed frame 5 are assembled into an integral curved surface Local dimming backlight module. When the curved surface Local dimming backlight module is used, the curved surface Local dimming backlight module is arranged on the back surface of the liquid crystal display screen and used as a backlight source of the liquid crystal display screen.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A curved surface Local dimming backlight module is characterized in that: the LED lamp comprises a back plate (1), a lamp panel (2), a reflecting shade (3), an optical film plate component (4) and a fixing frame (5), wherein the lamp panel (2) is adhered and fixed in the back plate (1) through a heat-conducting adhesive (21), the reflecting shade (3) is adhered on the lamp panel (2) through a fixing adhesive (33), the optical film plate component (4) is arranged on the reflecting shade (3), and the lamp panel (2), the reflecting shade (3) and the optical film plate component (4) are pressed and fixed in the back plate (1) through the fixing frame (5); the lamp panel (2) comprises a plurality of light emitting areas which are used for adjusting light independently, a plurality of light sources are arranged in each light emitting area, a plurality of light reflecting cups are arranged on the light reflecting cover (3), each light source is matched with each light reflecting cup, and a light source is arranged in each light reflecting cup; the reflector (3) is provided with a first fixing mechanism, a second fixing mechanism is arranged on the backboard (1), the first fixing mechanism is matched with the second fixing mechanism, and the reflector (3) is fixed in the backboard (1) through the first fixing mechanism and the second fixing mechanism.

2. The curved surface Local dimming backlight module according to claim 1, wherein: the first fixing mechanism on the reflector (3) comprises a first limiting insert block (31), the second fixing mechanism on the backboard (1) comprises a first limiting slot (11), the first limiting insert block (31) is matched with the first limiting slot (11), and the first limiting insert block (31) is inserted into the first limiting slot (11).

3. The curved surface Local dimming backlight module according to claim 2, wherein: the first fixing mechanism on the reflector (3) further comprises a first fixing clamping block (32), the second fixing mechanism on the backboard (1) further comprises a first fixing clamping groove (12), the first fixing clamping block (32) is matched with the first fixing clamping groove (12), and the first fixing clamping block (32) is clamped in the first fixing clamping groove (12).

4. A curved surface Local dimming backlight module according to any of claims 1 to 3, wherein: be provided with second spacing slot (13) on backplate (1), be provided with second spacing insert (51) on fixed frame (5), second spacing slot (13) and second spacing insert (51) looks adaptation, second spacing insert (51) bond in second spacing slot (13) through first double faced adhesive tape (511).

5. The curved surface Local dimming backlight module according to claim 4, wherein: the backboard (1) is further provided with a second fixing clamping groove (14), the fixing frame (5) is further provided with a second fixing clamping block (52), the second fixing clamping groove (14) is matched with the second fixing clamping block (52), and the second fixing clamping block (52) is clamped in the second fixing clamping groove (14).

6. The curved surface Local dimming backlight module according to claim 5, wherein: still be provided with third spacing slot (15) on backplate (1), be provided with third fixed fixture block (16) in third spacing slot (15), be provided with third spacing cartridge (53) on fixed frame (5), be provided with third fixed draw-in groove (54) on third spacing cartridge (53), third spacing slot (15) and third spacing cartridge (53) looks adaptation, third fixed fixture block (16) and third fixed draw-in groove (54) looks adaptation, third spacing cartridge (53) are pegged graft in third spacing slot (15), third fixed fixture block (16) joint is in third fixed draw-in groove (54).

7. The curved surface Local dimming backlight module according to claim 6, wherein: the optical film plate component (4) comprises a diffusion plate (41), a light diffusion film (42), a brightness enhancement film (43) and a DBEF film (44), wherein the diffusion plate (41), the light diffusion film (42), the brightness enhancement film (43) and the DBEF film (44) are sequentially overlapped on the reflecting cover (3); the diffusion plate (41), the light diffusion film (42), the light enhancement film (43) and the DBEF film (44) are all provided with fourth limiting inserting blocks (45), the back plate (1) is provided with fourth limiting inserting grooves (17), the fourth limiting inserting blocks (45) are matched with the fourth limiting inserting grooves (17), and the fourth limiting inserting blocks (45) are inserted into the fourth limiting inserting grooves (17).

8. The curved surface Local dimming backlight module according to claim 7, wherein: limiting openings (46) are formed in the diffusion plate (41), the light diffusion film (42), the light enhancement film (43) and the DBEF film (44), limiting columns (18) are arranged on the back plate (1), the limiting openings (46) are matched with the limiting columns (18), and the limiting columns (18) are inserted into the limiting openings (46).

9. The curved surface Local dimming backlight module of claim 8, wherein: the diffusion plate fixing clamp block (412) is further included, and the diffusion plate (41) is clamped and fixed in the back plate (1) through the diffusion plate fixing clamp block (412).

10. The curved surface Local dimming backlight module according to claim 7, wherein: the diffusion plate (41) is adhered and fixed on the back plate (1) through a second double-sided adhesive (411), and the diffusion plate (41) is adhered and fixed with the light diffusion film (42), the light diffusion film (42) and the light enhancement film (43) and the DBEF film (44) through a third double-sided adhesive (421).