A side-entry backlight module

Abstract

The invention discloses a side-entry backlight module, including a back cavity, a side-entry light bar, a front-light reflective bar, a reflective film, a light-scattering component and a fixing frame, wherein the side-entry light bar is arranged on the inner side wall of the back cavity, the reflective film is arranged on the inner bottom of the back cavity, the front-light reflective bar is arranged at a position between the side-entry light bar and the reflective film at the inner bottom of the back cavity, the light-scattering component is stacked on the reflective film, the fixing frame is fixed on the back cavity, and the light-scattering component is fixed in the back cavity; the side-entry light bar includes a PCB board and a plurality of LED lamps, each LED lamp is arranged in parallel on the PCB board, and the front-light reflective bar increases the brightness of the position between adjacent LED lamps in front of the PCB board, and reduces the brightness directly in front of the LED lamp on the PCB board. The invention arranges the front-light reflective bar at a position between the side-entry light bar and the reflective film at the inner bottom of the back cavity, which can improve the phenomenon of alternating light and dark at a position near the side-entry light bar of the side-entry backlight module, thereby improving the uniformity of light emission of the side-entry backlight module.

Description

Technical Field

[0001] The present invention relates to the technical field of backlight modules, and in particular to a side-entry backlight module. Background Art

[0002] Liquid crystal displays have many advantages such as thin body, power saving, and no radiation, so they have been widely used, such as computer monitors, televisions, car displays, etc. However, liquid crystal displays cannot emit light on their own and need to be provided with backlight sources by backlight modules. The white light emitted by the backlight modules is processed by the liquid crystal display to form colorful patterns, thereby realizing the display function of the liquid crystal display. Therefore, the backlight module is an important part of the liquid crystal display. The backlight module includes a direct-type backlight module and an edge-type backlight module. The edge-type backlight module is thinner than the direct-type backlight module. Using the edge-type backlight module as the backlight source of the liquid crystal display can reduce the thickness of the liquid crystal display, so the edge-type backlight module is more widely used in liquid crystal displays. The side light emitted by the side-entry backlight module through the side-entry light bar is processed by the light guide plate, diffusion film, etc. to form a uniform backlight. The side-entry light bar includes a PCB board and multiple LED lights lined up on the PCB board. There is a certain distance between adjacent LED lights. When the backlight module is illuminated, the light in front of the LED light is brighter, and the position between adjacent LED lights is darker because there is no direct LED light. As a result, there is a phenomenon of alternating light and dark near the side-entry light bar of the side-entry backlight module, which affects the uniformity of the light emission of the side-entry backlight module, and then affects the display effect of the LCD display. There are also some technical solutions in the prior art that take some measures to improve the bright and dark alternating phenomenon near the side-entry light bar of the side-entry backlight module. For example, in the patent document "CN201410811966.3 Side-entry backlight module and its light guide plate", a microstructure is set on the light guide plate near the side-entry light bar to improve the bright and dark alternating phenomenon near the side-entry light bar of the side-entry backlight module. Although this method can improve the bright and dark alternating phenomenon near the side-entry light bar of the side-entry backlight module, it is necessary to make a microstructure on the light guide plate, which is complicated in process and has high production cost. Summary of the invention

[0003] The technical problem solved by the present invention is to provide an edge-entry backlight module that can solve the technical problem that the edge-entry backlight module has a light-dark alternation phenomenon near the edge-entry light bar, which affects the uniformity of the light emission of the edge-entry backlight module.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a side-entry backlight module, including a back cavity, a side-entry light bar, a front-light reflective bar, a reflective film, a light-scattering component and a fixing frame, wherein the side-entry light bar is arranged on the inner wall of the back cavity, the reflective film is arranged at the inner bottom of the back cavity, the front-light reflective bar is arranged at a position between the side-entry light bar and the reflective film at the inner bottom of the back cavity, the light-scattering component is stacked on the reflective film, the fixing frame is fixed on the back cavity, and the light-scattering component is fixed in the back cavity; the side-entry light bar includes a PCB board and a plurality of LED lamps, each of the LED lamps is arranged in parallel on the PCB board, and the front-light reflective bar increases the brightness of the position between adjacent LED lamps in front of the PCB board, and reduces the brightness directly in front of the LED lamp on the PCB board.

[0005] Furthermore, the front-lamp reflector strip includes a plurality of convex structures and groove structures, the convex structures and groove structures are arranged at intervals from each other, each of the convex structures is arranged between adjacent LED lamps in front of the PCB board, and each of the groove structures is arranged directly in front of the LED lamp.

[0006] Furthermore, a first card block is provided on the outside of the fixed frame, a first plug hole is provided on the first card block, a first card slot is provided on the front side of the back cavity, a first plug block is provided in the first card slot, the first card block is adapted to the first card slot, the first plug hole is adapted to the first plug block, the first card block is adhesively fixed in the first card slot, and the first plug block is plugged into the first plug hole.

[0007] Furthermore, the first card slot is arranged on the other side of the back cavity except where the side-entry light strip is located, a second card slot is arranged on the outer side of the side where the side-entry light strip is located on the back cavity, a second plug-in block is arranged in the second card slot, a second card block is arranged on the outer side of the fixed frame, a second card block is arranged on the second card block, the second card slot is adapted to the second card block, the second plug-in block is adapted to the second plug-in hole, the second card block is clamped and fixed in the second card slot, and the second plug-in block is plugged into the second plug-in hole.

[0008] Furthermore, a third card slot is provided on the inner side wall of the back cavity, a third card block is provided on the outer side of the fixed frame, the third card slot is matched with the third card block, and the third card block is connected in the third card slot.

[0009] Furthermore, the light-scattering component includes a light guide plate and a multi-layer film, the light guide plate is stacked on the reflective film, and each of the film sheets is stacked on the light guide plate in turn; a positioning protrusion is provided on the light guide plate, and a positioning slot is provided on each of the film sheets, the positioning protrusion is adapted to the positioning slot, and the positioning protrusion is inserted into the positioning slot.

[0010] Furthermore, it also includes film fixing glue, and the light guide plate, the film and the adjacent film are bonded and fixed together by the film fixing glue.

[0011] Furthermore, the light guide plate is also provided with a fixing protrusion, the back cavity is provided with a fixing socket, the fixing protrusion is adapted to the fixing socket, and the fixing protrusion is plugged into the fixing socket.

[0012] Furthermore, the light guide plate is also provided with supporting bumps, the PCB board is provided with reinforcing pads, the supporting bumps are matched with the reinforcing pads, and the light guide plate is supported on the reinforcing pads through the supporting bumps.

[0013] Furthermore, it also includes a clamping block, which clamps the light guide plate in the back cavity.

[0014] The beneficial effects achieved by the present invention are mainly as follows: the side-entry backlight module sets a front-light reflective strip at a position between the side-entry light bar and the reflective film at the bottom of the inner side of the back cavity, and increases the brightness between adjacent LED lights in front of the PCB board through the front-light reflective strip, and reduces the brightness directly in front of the LED lights on the PCB board, so that the brightness near the side-entry light bar of the side-entry backlight module is more uniform, thereby improving the problem of alternating brightness near the side-entry light bar of the side-entry backlight module through the front-light reflective strip, improving the uniformity of the light emission of the side-entry backlight module, and further optimizing the display effect of the liquid crystal display. In addition, the front-light reflective strip and the reflective film are independently set, so that the reflective film is far away from the side-entry light bar, avoiding the heat generated when the side-entry light bar emits light, causing the reflective film to expand due to heat and causing the reflective film to wrinkle unevenly, thereby further ensuring the uniformity of the light emission of the backlight module and the display effect of the liquid crystal display. Moreover, the reflective strip in front of the lamp can be made of reflective film, which has low material cost, easy production and convenient assembly. The use of the reflective strip in front of the lamp to improve the problem of alternating light and dark near the side-entry light bar of the side-entry backlight module can reduce production costs, thereby reducing the cost of the side-entry backlight module and improving the market competitiveness of the side-entry backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the exploded structure of the edge-type backlight module in an embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the front reflector strip of the edge-lit backlight module in an embodiment of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the installation of the back cavity of the edge-type backlight module, the edge-type light bar, the front reflective bar of the light and the light guide plate in an embodiment of the present invention;

[0018] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0019] Figure 5 for Figure 3 The enlarged structural diagram of the middle B part;

[0020] Figure 6 It is a schematic diagram of the structure of the back cavity of the edge-type backlight module in an embodiment of the present invention;

[0021] Figure 7 for Figure 6 The enlarged structural diagram of the middle C part;

[0022] Figure 8 Schematic diagram of the structure of the edge-type backlight module fixing frame in an embodiment of the present invention;

[0023] Fig. 9 for Figure 8 The enlarged structural diagram of the middle D part;

[0024] Fig.10 for Figure 8 The enlarged structural diagram of the middle E part;

[0025] Fig.11 for Figure 8 The enlarged structural diagram of the middle F part;

[0026] Fig.12 It is a schematic diagram of the structure of the side-type light bar of the side-type backlight module in an embodiment of the present invention;

[0027] Fig.13 This is the enlarged structural diagram of the G section in Question 12;

[0028] Fig.14 Schematic diagram of the structure of the light guide plate of the edge-type backlight module in an embodiment of the present invention;

[0029] Fig.15 This is a schematic diagram of the enlarged structure of the H part in Question 14;

[0030] Fig.16 Schematic diagram of the structure of the edge-type backlight module film in an embodiment of the present invention;

[0031] Fig.17 This is a schematic diagram of the enlarged structure of Part I in Question 16.

[0032] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0033] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] Embodiment 1

[0035] See also Figures 1 to 17 , a side-entry backlight module, in which a front-lamp reflective strip 3 is arranged between a side-entry light strip 2 and a reflective film 4 at the bottom inner side of a back cavity 1, which can improve the phenomenon of alternating light and dark near the side-entry light strip of the side-entry backlight module, thereby improving the uniformity of light emission of the side-entry backlight module. The side-entry backlight module comprises a back cavity 1, a side-entry light strip 2, a front-lamp reflective strip 3, a reflective film 4, a light diffusion component 5 and a fixing frame 6. The back cavity 1 is a structure for mounting various parts of the side-entry backlight module, and can be manufactured by stamping or die-casting. The side-entry light strip 2 is arranged on the inner side wall of the back cavity 1, and can be fixed to the inner side wall of the back cavity 1 by bonding with a heat-conducting double-sided adhesive 23. The reflective film 4 is arranged at the inner bottom of the back cavity 1, and can be fixed to the inner bottom of the back cavity 1 by bonding with a double-sided adhesive. The light diffusion component 5 is stacked on the reflective film 4, converting the edge-entry light bar 2 into a backlight that emits light forward, and evenly diffuses the light emitted by the edge-entry light bar 2. The fixing frame 6 is fixed on the back cavity 1, and the light diffusion component 5 is fixed in the back cavity 1, so that the edge-entry backlight module forms an integral structure.

[0036] See also Figure 2 and Figure 3The front-light reflective strip 3 is arranged at a position between the side-entry light strip 2 and the reflective film 4 at the inner bottom of the back cavity 1. The front-light reflective strip 3 can be bonded to the inner bottom of the back cavity 1 or to the light guide plate by double-sided adhesive. The side-entry light strip 2 includes a PCB board 21 and a plurality of LED lights 22. Each of the LED lights 22 is arranged in a row on the PCB board 21. The front-light reflective strip 3 increases the brightness of the position between adjacent LED lights 22 in front of the PCB board 21, and reduces the brightness in front of the LED lights 22 on the PCB board 21, so that the brightness near the side-entry light strip of the side-entry backlight module is more uniform. Therefore, the front-light reflective strip 3 can be used to improve the problem of alternating brightness near the side-entry light strip of the side-entry backlight module, improve the uniformity of the light emission of the side-entry backlight module, and thus optimize the display effect of the liquid crystal display. In addition, the reflective strip 3 in front of the lamp is independently arranged from the reflective film 4, so that the reflective film 4 is far away from the side-entry light strip 2, so as to avoid the heat generated by the side-entry light strip 2 when emitting light, which causes the reflective film 4 to expand due to heat and cause the reflective film 4 to wrinkle and become uneven, thereby further ensuring the uniformity of the light emission of the backlight module and the display effect of the liquid crystal display. Moreover, the reflective strip 3 in front of the lamp can be made of a reflective film, which has low material cost, is easy to make and assemble. The use of the reflective strip 3 in front of the lamp can improve the problem of alternating light and dark near the side-entry light strip of the side-entry backlight module, thereby reducing the cost of the side-entry backlight module and improving the market competitiveness of the side-entry backlight module.

[0037] See also Figure 2 and Figure 3 The front-light reflective strip 3 includes a plurality of convex structures 31 and a groove structure 32, and the convex structures 31 and the groove structure 32 are arranged at intervals from each other, and can be specifically produced by cutting a whole strip of reflective film. Each of the convex structures 31 is respectively arranged between adjacent LED lamps 22 in front of the PCB board 21, thereby enhancing the reflection effect of the position between adjacent LED lamps 22 in front of the PCB board 21 on the edge-entry backlight module through the convex structures 31 of the front-light reflective strip 3, thereby increasing the brightness of the position between adjacent LED lamps 22 in front of the PCB board 21 on the edge-entry backlight module. Each of the groove structures 32 is respectively arranged in front of the LED lamp 22. The groove structure 32 cannot reflect light in front of the LED lamp 22 on the side-entry backlight module, which can reduce the brightness in front of the LED lamp 22 on the PCB board 21, so that the brightness near the side-entry light bar of the side-entry backlight module is more uniform. Therefore, the problem of alternating brightness and darkness near the side-entry light bar of the side-entry backlight module can be improved by the front-lamp reflection strip 3, thereby improving the uniformity of the light emission of the side-entry backlight module, and thus optimizing the display effect of the liquid crystal display.

[0038] See also Figures 1 to 17When assembling the edge-entry backlight module of this embodiment, the edge-entry light bar 2 is bonded and fixed to the inner wall of the back cavity 1 by double heat-conducting double-sided adhesive 23, the front reflective bar 3 and the reflective film 4 are bonded and fixed in sequence to the front of the edge-entry light bar 2 at the bottom of the inner side of the back cavity 1, the diffuser component 5 is stacked on the reflective film 4, the fixing frame 6 is fixed on the back cavity 1, and the diffuser component 5 is fixed in the back cavity 1. When the edge-entry backlight module is working, the edge-entry light bar 2 is connected to the power supply and lit, and the light of the edge-entry light bar 2 is processed by the diffuser component 5 to form a backlight module with uniform light emission. When the side-entry backlight module is working, the reflective strip 3 in front of the lamp increases the brightness of the position between the adjacent LED lamps 22 in front of the PCB board 21, and reduces the brightness directly in front of the LED lamp 22 on the PCB board 21, so that the brightness near the side-entry light bar of the side-entry backlight module is more uniform. Therefore, the reflective strip 3 in front of the lamp can be used to improve the problem of alternating brightness near the side-entry light bar of the side-entry backlight module, thereby improving the uniformity of light emission of the side-entry backlight module.

[0039] Embodiment 2

[0040] See also Figures 1 to 17 The overall structure of the edge-entry backlight module of this embodiment is the same as that of the first embodiment, and the mounting structure of the fixing frame 6 and the back cavity 1 is improved on the basis of the first embodiment, thereby improving the overall stability of the edge-entry backlight module.

[0041] See also Figure 3 , 5 , 8 and 9, a first card block 61 is provided on the outside of the fixing frame 6, and a first plug hole 62 is provided on the first card block 61. A first card slot 11 is provided on the front side of the back cavity 1, and a first plug block 12 is provided in the first card slot 11. The first card block 61 is adapted to the first card slot 11, that is, the position, size and number of the first card block 61 are consistent with the position, size and number of the first card slot 11, so that the first card block 61 can be just snapped into the first card slot 11. In addition, a double-sided adhesive tape 17 is provided in the first card slot 11, and the first card block 61 is further bonded and fixed in the first card slot 11 by the double-sided adhesive tape 17, so that the fixing frame 6 is stably fixed on the back cavity 1 in a three-dimensional direction, and then the diffusing component 5 is fixed in the back cavity 1. The first jack 62 is adapted to the first plug block 12, that is, the position, size and number of the first jack 62 are consistent with the position, size and number of the first plug block 12, so that the first plug block 12 is just plugged into the first jack 62, thereby stably fixing the first card block 61 in the first card slot 11, and then better fixing the fixing frame 6 on the back cavity 1, so that the side-entry backlight module is more stable to use.

[0042] See also Figures 3 to 10In order to prevent the installation structure of the fixed frame 6 and the back cavity 1 from affecting the installation and operation of the side-entry light strip 2, the first card slot 11 is arranged on the other side of the back cavity 1 except the side-entry light strip 2. A second card slot 13 is arranged on the outer side of the side-entry light strip 2 on the back cavity 1, and a second plug block 14 is arranged in the second card slot 13. A second card block 63 is arranged on the outer side of the fixed frame 6, and a second plug hole 64 is arranged on the second card block 63. The second card slot 13 is adapted to the second card block 63, that is, the position, size and number of the second card slot 13 are consistent with the position, size and number of the second card block 63, so that the second card block 63 is just snapped and fixed in the second card slot 13. The second plug block 14 is adapted to the second plug hole 64, that is, the position, size and number of the second card block 14 are consistent with the position, size and number of the second plug hole 64, so that the second plug block 14 is just plugged into the second plug hole 64. Thus, the fixing frame 6 can be stably installed on the side of the back cavity 1 where the side-entry light strip 2 is located, so that each side of the fixing frame 6 is stably installed on the back cavity 1, so that the diffuser component 5 is more stably fixed in the back cavity 1, and the overall structure of the side-entry backlight module is also more stable.

[0043] See also Figure 3 , 5 , 8 and 11, in order to prevent the fixing frame 6 from being pulled out when installed on the back cavity 1, a third card slot 15 is provided on the inner wall of the back cavity 1, and a third card block 65 is provided on the outer side of the fixing frame 6. The third card slot 15 is adapted to the third card block 65, that is, the position, size and number of the third card slot 15 are consistent with the position, size and number of the third card block 65, so that the third card block 65 is just connected to the third card slot 15, and the fixing frame 6 is stably installed on the inner side of the back cavity 1, and the fixing frame 6 can be blocked by the side wall of the back cavity 1 to prevent the fixing frame 6 from being pulled out. The fixing frame 6 can be made by stamping, so as to facilitate the manufacture of the card blocks, jacks and other structures thereon.

[0044] See also Figures 1 to 17When assembling the edge-entry backlight module of this embodiment, the edge-entry light bar 2 is bonded and fixed to the inner wall of the back cavity 1 by double heat-conducting double-sided adhesive 23, the front reflective bar 3 and the reflective film 4 are bonded and fixed in sequence to the front of the edge-entry light bar 2 at the bottom of the inner side of the back cavity 1, the diffuser component 5 is stacked on the reflective film 4, the fixing frame 6 is fixed on the back cavity 1, and the diffuser component 5 is fixed in the back cavity 1. When the edge-entry backlight module is working, the edge-entry light bar 2 is connected to the power supply and lit, and the light of the edge-entry light bar 2 is processed by the diffuser component 5 to form a backlight module with uniform light emission. When the side-entry backlight module is working, the front reflective strip 3 increases the brightness of the position between the adjacent LED lights 22 in front of the PCB board 21, and reduces the brightness in front of the LED lights 22 on the PCB board 21, so that the brightness near the side-entry light bar of the side-entry backlight module is more uniform. Therefore, the problem of alternating brightness near the side-entry light bar of the side-entry backlight module can be improved by the front reflective strip 3, and the uniformity of the light emission of the side-entry backlight module is improved. When the fixed frame 6 is fixedly installed with the back cavity 1, the first card block 61 is bonded and fixed in the first card slot 11 by the double-sided adhesive 17, the first plug block 12 is plugged into the first jack 62, the second card block 63 is fixed in the second card slot 13, and the third card block 65 is plugged into the third card slot 15.

[0045] Embodiment 3

[0046] See also Figures 1 to 17 The overall structure of the edge-entry backlight module of this embodiment is the same as that of the first or second embodiment, and the structure of the light-scattering component 5 and its installation in the edge-entry backlight module are improved on the basis of the first or second embodiment.

[0047] See also Figure 1 , Figures 14 to 17 The light diffusion component 5 includes a light guide plate 51 and a multi-layer film 52. The light guide plate 51 is stacked on the reflective film 4, and each of the film sheets 52 is sequentially stacked on the light guide plate 51. Each layer of the film sheets 52 can be set as needed. In this embodiment, it is set to a structure of a light diffusion film, a light enhancement film and a DBEF film. The light diffusion film, the light enhancement film and the DBEF film are sequentially stacked on the light guide plate 51. The light guide plate 51 is provided with a positioning protrusion 511, and each of the film sheets 52 is provided with a positioning card slot 521. The positioning protrusion 511 is adapted to the positioning card slot 521, that is, the number, position, size, and shape of the positioning protrusion 511 are consistent with the number, position, size, and shape of the positioning card slot 521, so that the positioning protrusion 511 can be just plugged into the positioning card slot 521, so that each layer of the film sheets 52 is stably fixed on the light guide plate 51. The positioning slots 521 are preferably provided on the left and right sides of each of the membrane sheets 52 and on the side where the side-entry light bar 2 is located, so that each layer of the membrane sheets 52 is fixed on the light guide plate 51 more stably.

[0048] See also Figure 1In order to make each layer of membrane 52 fixed on the light guide plate 51 more stably, a membrane fixing glue 7 is further provided, and the light guide plate 51 and the membrane 52 and the adjacent membranes 52 are bonded and fixed together by the membrane fixing glue 7. The membrane fixing glue 7 can be made of double-sided adhesive, which is bonded between the light guide plate 51 and the membrane 52 and between the adjacent membranes 52, so that each layer of membrane is bonded and fixed to the light guide plate. The membrane fixing glue 7 can also be made of single-sided adhesive, and an escape opening is provided on the membrane 52, and the escape opening of the upper membrane is larger than the escape opening of the lower membrane, so that all membranes are bonded and fixed to the light guide plate 51 by a single-sided adhesive on the uppermost membrane.

[0049] See also Fig.14 and Fig.15 The light guide plate 51 is also provided with a fixing protrusion 512, and the back cavity 1 is provided with a fixing socket (not shown in the figure), and the fixing protrusion 512 is adapted to the fixing socket, that is, the size, shape, number and position of the fixing protrusion 512 are consistent with the size, shape, number and position of the fixing socket, so that the fixing protrusion 512 can be just plugged into the fixing socket, and the light guide plate 51 is positioned and fixed in the back cavity 1, so that the side-entry backlight module is more stable.

[0050] See also Figures 12 to 15 The light guide plate 51 is also provided with a supporting protrusion 513, and the PCB board 21 is provided with a reinforcing pad 211. The supporting protrusion 513 is adapted to the reinforcing pad 211, that is, the size, shape, number and position of the supporting protrusion 513 are consistent with the size, shape, number and position of the reinforcing pad 211, so that the light guide plate 51 is just supported on the reinforcing pad 211 through the supporting protrusion 513, thereby preventing the light guide plate 51 from being directly supported on the PCB board 21 and damaging the PCB board 21.

[0051] See also Figure 1 In order to further stably install the light guide plate 51 in the back cavity 1, a clamping block 8 is further provided, and the clamping block 8 clamps the light guide plate 51 in the back cavity 1. The clamping block 8 is a silicone pad, and can be set as an L-shaped clamping block and a straight-shaped clamping block. The L-shaped clamping block is clamped at the corner of the light guide plate 51, and the straight-shaped clamping block is clamped outside the side of the light guide plate 51, so that the light guide plate 51 is clamped in the back cavity 1 outside the side and outside the corner of the light guide plate 51.

[0052] See also Figure 1The edge-entry backlight module also includes a surface protection film 91, a surface double-sided adhesive 92, a light shielding adhesive 93 and a protective film fixing adhesive 94. The surface protection film 91 is bonded to the outermost film through the protective film fixing adhesive 94 to prevent the film of the edge-entry backlight module from being contaminated by dust. The surface protection film 91 is torn off when in use. The surface double-sided adhesive 92 is bonded to the outside of the back cavity 1 to bond and fix the liquid crystal display. The light shielding adhesive 93 is bonded to the intersection of the outer side of the film and the fixed frame 6 to prevent light leakage from the edge-entry backlight module.

[0053] See also Figures 1 to 17 The assembly and working process of the edge-entry backlight module of this embodiment are the same as those of the first or second embodiment. For the same points, please refer to the first or second embodiment. When the layers of the membrane sheets 52 of this embodiment are installed on the light guide plate 51, the positioning protrusions 511 on the light guide plate 51 are clamped and fixed with the positioning grooves 521 on each membrane sheet 52. The light guide plate 51 and the membrane sheets 52 and the adjacent membrane sheets 52 are bonded and fixed together by the membrane fixing glue 7. The light guide plate 51 is plugged and fixed with the fixed socket of the back cavity 1 by the fixing protrusions 512, and is supported on the reinforcing pad 211 of the edge-entry light bar 2 by the supporting protrusions 513. The outer side of the light guide plate 51 is clamped to the inner side of the back cavity 1 by the clamping block 8.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An edge-type backlight module, characterized in that: The invention comprises a back cavity (1), a side-entry light bar (2), a front-light reflective bar (3), a reflective film (4), a light-scattering component (5) and a fixing frame (6), wherein the side-entry light bar (2) is arranged on the inner side wall of the back cavity (1), the reflective film (4) is arranged on the inner bottom of the back cavity (1), the front-light reflective bar (3) is arranged at a position between the side-entry light bar (2) and the reflective film (4) at the inner bottom of the back cavity (1), the light-scattering component (5) is stacked on the reflective film (4), and the fixing frame (6) is provided. The frame (6) is fixed on the back cavity (1), and the light diffusion component (5) is fixed in the back cavity (1); the side-entry light bar (2) comprises a PCB board (21) and a plurality of LED lights (22), each of the LED lights (22) being arranged in parallel on the PCB board (21); the front light reflection bar (3) increases the brightness of the position between adjacent LED lights (22) in front of the PCB board (21), and reduces the brightness in front of the LED lights (22) on the PCB board (21); The front-lamp reflector strip (3) comprises a plurality of convex block structures (31) and concave block structures (32), the convex block structures (31) and the concave block structures (32) being arranged at intervals from each other, each of the convex block structures (31) being arranged at a position between adjacent LED lamps (22) in front of the PCB board (21), and each of the concave block structures (32) being arranged at a position directly in front of the LED lamp (22); The light-scattering component (5) comprises a light guide plate (51) and a multilayer film (52), wherein the light guide plate (51) is stacked on the reflective film (4), and each of the films (52) is stacked on the light guide plate (51) in sequence; The light guide plate (51) is further provided with a supporting protrusion (513), the PCB board (21) is provided with a reinforcing pad (211), the supporting protrusion (513) is adapted to the reinforcing pad (211), and the light guide plate (51) is supported on the reinforcing pad (211) via the supporting protrusion (513).

2. The edge-lit backlight module according to claim 1, characterized in that: A first card block (61) is arranged on the outside of the fixing frame (6), a first plug hole (62) is arranged on the first card block (61), a first card slot (11) is arranged on the front side of the back cavity (1), a first plug block (12) is arranged in the first card slot (11), the first card block (61) is matched with the first card slot (11), the first plug hole (62) is matched with the first plug block (12), the first card block (61) is adhesively fixed in the first card slot (11), and the first plug block (12) is plugged in the first plug hole (62).

3. The edge-lit backlight module according to claim 2, characterized in that: The first card slot (11) is arranged on the other side of the back cavity (1) except the position where the side-entry light strip (2) is located; a second card slot (13) is arranged on the outer side of the side-entry light strip (2) on the back cavity (1); a second plug block (14) is arranged in the second card slot (13); a second card block (63) is arranged on the outer side of the fixing frame (6); a second plug hole (64) is arranged on the second card block (63); the second card slot (13) is matched with the second card block (63); the second plug block (14) is matched with the second plug hole (64); the second card block (63) is fixed in the second card slot (13); and the second plug block (14) is plugged in the second plug hole (64).

4. The edge-lit backlight module according to claim 3, characterized in that: A third card slot (15) is provided on the inner side wall of the back cavity (1), a third card block (65) is provided on the outer side of the fixed frame (6), the third card slot (15) is adapted to the third card block (65), and the third card block (65) is engaged in the third card slot (15).

5. The edge-lit backlight module according to claim 1, characterized in that: The light guide plate (51) is provided with a positioning protrusion (511), and each of the membranes (52) is provided with a positioning slot (521); the positioning protrusion (511) is matched with the positioning slot (521), and the positioning protrusion (511) is inserted into the positioning slot (521).

6. The edge-lit backlight module according to claim 5, characterized in that: It also comprises a film fixing glue (7), and the light guide plate (51) and the film (52) and the adjacent film (52) are bonded and fixed together by the film fixing glue (7).

7. The edge-lit backlight module according to claim 5, characterized in that: The light guide plate (51) is also provided with a fixing protrusion (512), the back cavity (1) is provided with a fixing plug hole, the fixing protrusion (512) is adapted to the fixing plug hole, and the fixing protrusion (512) is plugged into the fixing plug hole.

8. The edge-lit backlight module according to claim 7, characterized in that: It also comprises a clamping block (8), wherein the clamping block (8) clamps the light guide plate (51) in the back cavity (1).

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