Lateral incidence type backlight source device

Abstract

The utility model aims to provide a side entry type backlight source device, which solves the problem that lamp beads are easy to damage, and comprises a supporting assembly and a light source assembly, the light source assembly comprises a lamp strip and a heat conduction strip, the heat conduction strip is arranged around a back plate, the lamp strip is arranged on the inner side of the heat conduction strip, and a front frame is connected with the heat conduction strip; light rays of the lamp beads point to the side wall of the light guide plate, the light guide plate is used for reflecting lamplight, the heat conduction strip surrounds the back plate, the lamp strip is arranged on the inner side of the heat conduction strip, and the circuit board is used for being connected with a power source. The light guide plate is clamped in the multiple supporting columns, the lamp beads emit light towards the side wall of the light guide plate, the supporting columns are longer than the lamp post, in this way, extrusion between the lamp beads and the light guide plate is avoided, the space where the lamp beads are located is not reduced, the lamp beads are protected in a multi-layer mode, touch to the lamp beads is reduced, and therefore the problem that the lamp beads are prone to being damaged is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight sources, in particular to a side-entry backlight source device. Background Art

[0002] Edge-type backlight is a common backlight technology for LCD displays. It encapsulates the backlight module on the side of the LCD panel and uses a light guide plate to refract light to the entire screen area. A major advantage of edge-type backlight is that it can significantly reduce the overall thickness of the device. Since the light source is located at the edge of the screen rather than directly under the liquid crystal layer, this makes the device lighter and thinner.

[0003] However, the disadvantages of the side-entry type are also obvious. The space available for placing the light source on the side is limited. The light of the lamp beads will generate heat, which is difficult to dissipate in the limited space, resulting in heating. At the same time, because of its light weight, the lamp beads are easily damaged during transportation or installation. Utility Model Content

[0004] The utility model aims to provide a side-entry backlight device, which solves the problem that lamp beads are easily damaged.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides an edge-lit backlight device, comprising a support assembly and a light source assembly, wherein the support assembly comprises a frame, a back plate and a front frame, and the back plate is arranged on the frame;

[0007] The light source assembly includes a light bar and a heat-conducting bar, the heat-conducting bar is arranged around the back plate, the light bar is arranged inside the heat-conducting bar, and the front frame is connected to the heat-conducting bar;

[0008] The light source assembly also includes a light guide plate. The inner surface of the light bar has multiple lamp beads and multiple pillars. The light guide plate is arranged on the inner side of the light bar. The lamp beads and the pillars are located on the same side. The length of the pillars is longer than the lamp beads. The multiple pillars support the outer periphery of the light guide plate. The light from the lamp beads is directed to the side wall of the light guide plate. The light guide plate is used to reflect light.

[0009] Optionally, the light source assembly includes reflective paper, and the reflective paper is arranged between the light guide plate and the back plate.

[0010] Furthermore, the light source assembly includes an optical film, and the optical film is arranged between the front frame and the thermal conductive strip.

[0011] Optionally, the light source assembly further includes a protective cover, which is disposed on the top of the back plate and covers the light bar.

[0012] Optionally, a plurality of bending ears are provided on the front frame, and the bending ears are connected to the heat conducting strips via bolts.

[0013] Optionally, a rectangular hole is provided on the back plate, and the heat conducting strip can be lifted and lowered in the rectangular hole.

[0014] Optionally, the pillar is 0.4-0.6 mm higher than the lamp bead in the vertical direction, and the pillar is 1.4-1.6 mm longer than the lamp bead in the horizontal direction.

[0015] Optionally, a reinforcing plate is provided on the back panel, the reinforcing plate and the circuit board are located on the same side, a reinforcing strip is provided on the reinforcing plate, an angle is formed between the reinforcing strip and the reinforcing plate, and the reinforcing plate is connected to the frame.

[0016] Optionally, the frame has a first baffle and a second baffle on both sides, the first baffle is provided with a first air hole, the second baffle is provided with a second air hole, and the first air hole and the second air hole are used for gas circulation.

[0017] Optionally, the light bar and the heat conductive bar are connected via a double-sided adhesive tape that can conduct heat.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] The utility model provides a side-entry backlight device, in which the light bar is arranged on the inner side of the heat-conducting bar, the light guide plate is arranged on the inner side of the light bar, the light guide plate is clamped in a plurality of pillars, the lamp beads emit light facing the side wall of the light guide plate, and the pillars are longer than the lamp posts. In this way, there will be no squeezing between the lamp beads and the light guide plate, the space where the lamp beads are located will not be reduced, the lamp beads are protected by multiple layers, and the lamp beads are less likely to be touched, thereby solving the problem of easy damage to the lamp beads. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0021] Figure 1 This is a three-dimensional view of an edge-lit backlight device according to an embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 An exploded view of a portion of the light source assembly structure is shown;

[0023] Figure 3 This is a structural diagram of the light bar, heat conduction bar and light guide plate;

[0024] Figure 4 yes Figure 1 Another perspective view shown;

[0025] Figure 5 yes Figure 4 An enlarged view of section A is shown;

[0026] Figure 6 This is a structural diagram of the first positioning block and the second positioning block on the front frame;

[0027] Figure 7 is an enlarged view of the first positioning block;

[0028] Figure 8 This is an enlarged view of the second positioning block.

[0029] The description of the accompanying drawings is as follows:

[0030] 1. Support assembly; 2. Light source assembly; 3. First positioning block; 4. Second positioning block; 411. Frame; 12. Back panel; 13. Front frame; 14. Bending ear; 15. Rectangular hole; 16. Reinforcement plate; 17. Reinforcement strip; 19. First baffle; 20. Second baffle; 21. Light bar; 22. Heat conduction strip; 23. Circuit board; 24. Lamp beads; 25. Pillar; 26. Reflective paper; 27. Optical film; 28. Protective cover; 29. ​​Light guide plate; 31. First limiting hole; 32. Second limiting hole; 33. First sinking platform; 34. Second sinking platform; 40. Clamping surface; 190. First air hole; 200. Second air hole. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 and Figure 2 and Figure 3 As shown, an edge-type backlight device includes a support assembly 1 and a light source assembly 2. The support assembly 1 is used to fix and support the light source assembly 2, and the light source assembly 2 is used to emit light.

[0035] The support assembly 1 includes a frame 11 , a back plate 12 and a front frame 13 . The back plate 12 is vertically arranged on the frame 11 .

[0036] The light source assembly 2 includes a light bar 21 and a thermally conductive bar 22. The thermally conductive bar 22 is arranged around the back panel 12. In this application, the thermally conductive bar 22 is arranged in a rectangular shape, and the light bar 21 is arranged on the inner side of the thermally conductive bar 22. The light source assembly 2 also includes a circuit board 23. The circuit board 23 is arranged on the back panel 12. The circuit board 23 is arranged back to back with the thermally conductive bar 22. The circuit board 23 is used to connect to the power supply. The light bar 21 is electrically connected to the circuit board 23. The circuit board 23 is used to supply power to the light bar 21.

[0037] The front frame 13 is connected to the thermal conductive strip 22. The front frame 13 is set in contact with the thermal conductive strip 22. The front frame 13 covers the light bar 21 in the thermal conductive strip 22. The light source assembly 2 also includes a light guide plate 29. The inner surface of the light bar 21 has multiple lamp beads 24 and multiple pillars 25. The pillars 25 are made of rubber pillars. The pillars 25 have a slight elasticity. The light guide plate 29 is set on the inner side of the light bar 21. The lamp beads 24 and the pillars 25 are located on the same side. The length of the pillars 25 is longer than that of the lamp beads 24. Multiple pillars 25 are used to support the outer periphery of the light guide plate 29. In this way, multiple pillars 25 abut on the outer periphery of the light guide plate 29. There is a gap between the lamp beads 24 and the light guide plate 29. The light of the lamp beads 24 is directed to the side wall of the light guide plate 29, and the light is evenly distributed on the light guide plate 29.

[0038] The light bar 21 is disposed between the heat conducting bar 22 and the light guide plate 29 , and the front frame 13 also covers the heat conducting bar 22 .

[0039] The light source assembly 2 includes a reflective paper 26 , which is disposed between the light guide plate 29 and the back plate 12 . The reflective paper 26 is adhered to the back plate 12 , and the reflective paper 26 increases light reflection.

[0040] The light source assembly 2 includes an optical film 27 . The optical film 27 and the reflective paper 26 are respectively arranged on both sides of the light guide plate 29 . The optical film 27 can atomize the light to make the light more uniform.

[0041] The light source assembly 2 also includes a protective cover 28, which is arranged on the top of the back plate 12. The light bar 21 is within the coverage of the protective cover 28. The protective cover 28 can prevent condensed water from entering the area where the light bar 21 is located, thereby avoiding water ingress and short circuit of the lamp beads 24.

[0042] A plurality of bending ears 14 are provided on the front frame 13 , and the bending ears 14 are connected to the heat conducting strips 22 by bolts.

[0043] A rectangular hole 15 is provided on the back plate 12 . The rectangular hole 15 has a high side and a low side, so that the heat conducting strip 22 can be raised and lowered in the rectangular hole 15 .

[0044] The light bar 21 can be set vertically or horizontally. In the vertical direction, the pillars 25 on the light bar 21 are 0.4-0.6mm longer than the lamp beads 24. In the horizontal direction, the pillars 25 on the light bar 21 are 0.4-0.6mm longer than the lamp beads 24. The above distance has the best optical effect and reserves space for the expansion and deformation of the light guide plate 29 after being heated or moistened.

[0045] A reinforcing plate 16 is provided on the back panel 12, and the reinforcing plate 16 and the circuit board 23 are located on the same side. A reinforcing strip 17 is provided on the reinforcing plate 16, and an angle is formed between the reinforcing strip 17 and the reinforcing plate 16. The reinforcing plate 16 is connected to the frame 11, and the frame 11 supports the back panel 12 by supporting the reinforcing plate 16, so that the back panel 12 is not easy to bend, and the reinforcing strip 17 and the reinforcing plate 16 are formed as one piece.

[0046] like Figure 4 and Figure 5 As shown, the frame 11 has a first baffle 19 and a second baffle 20 on both sides, the first baffle 19 is provided with a first air hole 190, and the second baffle 20 is provided with a second air hole 200. The first air hole 190 and the second air hole 200 are used for gas circulation. The first air hole 190 and the second air hole 200 are aligned with both sides of the light bar 21. The first air hole 190 and the second air hole 200 can let cool air in to cool down the light bar 21 in the luminous state. In addition, fans can be set in the first air hole 190 and the second air hole 200 to blow air. The number of the first air hole 190 and the second air hole 200 is not limited.

[0047] The light bar 21 is connected to the heat-conducting bar 22 by a double-sided adhesive tape that can conduct heat. The heat-conducting bar 22 is made of aluminum, so that the heat-conducting bar 22 can not only dissipate heat but also reduce weight.

[0048] like Figure 6 and Figure 7 and Figure 8As shown, a first positioning block 3 and a second positioning block 4 are provided on the front frame 13, at least two first positioning blocks 3 are respectively provided on both side frames of the front frame 13, and at least two second positioning blocks 4 are respectively provided on the top and bottom of the front frame 13. The first positioning block 3 and the second positioning block 4 are used to jointly fix the display screen.

[0049] The first positioning block 3 has a first limiting hole 31 and a second limiting hole 32 . A first sinking platform 33 is provided in the first limiting hole 31 , and a second sinking platform 34 is provided in the second limiting hole 32 .

[0050] The second positioning block 4 is different from the first positioning block 3 in structure in that the second positioning block 4 has a clamping surface 40 , and the two clamping surfaces 40 are arranged opposite to each other, and the two clamping surfaces 40 are used to clamp the display screen together.

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An edge-lit backlight device, comprising a support assembly (1) and a light source assembly (2), characterized in that: The support assembly (1) comprises a frame (11), a back plate (12) and a front frame (13), wherein the back plate (12) is arranged on the frame (11); The light source assembly (2) comprises a light bar (21) and a heat-conducting bar (22), the heat-conducting bar (22) being arranged around the back plate (12), the light bar (21) being arranged inside the heat-conducting bar (22), and the front frame (13) being connected to the heat-conducting bar (22); The light source assembly (2) further comprises a light guide plate (29), the inner surface of the light bar (21) comprises a plurality of lamp beads (24) and a plurality of pillars (25), the light guide plate (29) is arranged on the inner side of the light bar (21), the lamp beads (24) and the pillars (25) are located on the same side, the length of the pillars (25) is longer than that of the lamp beads (24), the plurality of pillars (25) support the outer periphery of the light guide plate (29), the light of the lamp beads (24) is directed toward the side wall of the light guide plate (29), and the light guide plate (29) is used to reflect light.

2. The edge-lit backlight device according to claim 1, wherein: The light source assembly (2) comprises a reflective paper (26), and the reflective paper (26) is arranged between the light guide plate (29) and the back plate (12).

3. The edge-type backlight device according to claim 2, wherein: The light source assembly (2) comprises an optical film (27), and the optical film (27) and the reflective paper (26) are respectively arranged on both sides of the light guide plate (29).

4. The edge-lit backlight device according to claim 1, wherein: The light source assembly (2) further comprises a protective cover (28), wherein the protective cover (28) is arranged on the top of the back plate (12), and the light bar (21) is within the coverage of the protective cover (28).

5. The edge-type backlight device according to claim 1, wherein: A plurality of bending ears (14) are provided on the front frame (13), and the bending ears (14) are connected to the heat conducting strip (22) via bolts.

6. The edge-type backlight device according to claim 1, wherein: A rectangular hole (15) is provided on the back plate (12), and the heat conducting strip (22) is arranged in the rectangular hole (15) so as to be able to be raised and lowered.

7. The edge-type backlight device according to claim 1, wherein: The light bar (21) has two modes of vertical setting and horizontal setting. In the vertical direction, the pillar (25) on the light bar (21) is 0.4-0.6 mm longer than the lamp bead (24). In the horizontal direction, the pillar (25) on the light bar (21) is 0.4-0.6 mm longer than the lamp bead (24).

8. The edge-lit backlight device according to claim 1, wherein: The light source assembly (2) further comprises a circuit board (23); a reinforcing plate (16) is provided on the back plate (12); the reinforcing plate (16) and the circuit board (23) are located on the same side; a reinforcing strip (17) is provided on the reinforcing plate (16); an angle is formed between the reinforcing strip (17) and the reinforcing plate (16); and the reinforcing plate (16) is connected to the frame (11).

9. The edge-lit backlight device according to claim 1, wherein: The frame (11) has a first baffle (19) and a second baffle (20) on both sides, the first baffle (19) is provided with a first air hole (190), the second baffle (20) is provided with a second air hole (200), and the first air hole (190) and the second air hole (200) are used for gas circulation.

10. The edge-lit backlight device according to claim 1, wherein: The light bar (21) and the heat conducting bar (22) are connected via a double-sided adhesive tape capable of conducting heat.

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