Light uniform distribution backlight source structure capable of eliminating bright side effect

Abstract

The invention provides a light uniform distribution backlight source structure capable of eliminating a bright side effect, and belongs to the technical field of backlight modules. Comprising a back frame and a liquid crystal panel, a reflecting plate, a light guide plate, a diffusion sheet and two brightness enhancement sheets are sequentially stacked in the back frame, a side light source is installed in the back frame and attached to the side face of the light guide plate, and a heat conduction ring is installed on the side, close to the liquid crystal panel, of the back frame. Through the arrangement of the sealing ring, the heat transfer piece and the heat transfer clamping piece, heat generated at the light guide plate can be timely transferred to the heat dissipation cover through the heat transfer elastic piece and the heat transfer clamping piece after being transferred to the sealing ring, effective heat dissipation of the sealing ring is achieved, the influence of the heat on the sealing ring is reduced, and the aging time of the sealing ring is greatly prolonged; stable attachment of the sealing ring and the light guide plate is guaranteed, light distribution is more uniform, the probability of light leakage between the sealing ring and the light guide plate is greatly reduced, and therefore the bright edge phenomenon is effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of backlight modules, and in particular to a light uniformly distributed backlight source structure for eliminating bright edge effects. Background Art

[0002] The display backlight structure is the backlight module of the display. The backlight module is a light source component located behind the liquid crystal display, which is used to provide uniform backlight to the liquid crystal display panel so that the liquid crystal display can display images normally. The backlight module is mainly composed of a frame, a reflector, a light guide, a light source, a diffuser and two brightening films. The frame is pressed on the light guide to position the light guide and prevent light leakage.

[0003] After searching, a Chinese patent with authorization announcement number CN110456568B discloses a backlight source bright edge removal structure, including a back plate, the back plate is provided with a placement groove, a reflective sheet is provided at the bottom of the placement groove, a light guide plate is provided above the reflective sheet, a frame is fixed in the placement groove, the frame is pressed on the edge of the light guide plate, a light source is provided on one side of the light guide plate, and the frame covers the light source; the frame is formed by metal stamping, an elastic arm is provided on the inner side of the frame, the end of the elastic arm is covered with an elastic pad, and the elastic pad abuts against the surface of the edge of the light guide plate.

[0004] In the above patent, an elastic pad is used to abut the surface of the edge of the light guide plate to prevent light leakage. However, during long-term use, the heat generated at the light guide plate is transferred to the elastic pad. The heat easily aggravates the aging of the elastic pad. After aging, the elastic pad becomes hard and shrinks slightly. When the elastic pad becomes hard and shrinks slightly, it is difficult for the elastic pad to fit tightly with the light guide plate, affecting the seal between the elastic pad and the light guide plate, thereby increasing the probability of light leakage at the joint between the elastic pad and the light guide plate. Therefore, the present application provides a light uniformly distributed backlight source structure that eliminates the bright edge effect to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a light uniformly distributed backlight structure that eliminates the bright edge effect to solve the problem that the elastic pad is easily aged and affects the seal between the elastic pad and the light guide plate, thereby increasing the probability of light leakage at the joint between the elastic pad and the light guide plate.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A light uniform distribution backlight source structure for eliminating bright edge effect, comprising a back frame and a liquid crystal panel, wherein a reflector, a light guide plate, a diffuser and two light enhancement plates are sequentially stacked in the back frame, a side light source is installed in the back frame, and the side light source is attached to the side of the light guide plate, and further comprising:

[0008] A sealing ring, a heat-conducting ring is installed on a side of the back frame close to the liquid crystal panel, the liquid crystal panel is installed on a side of the heat-conducting ring away from the back frame, a heat dissipation cover is fixed on the side of the heat-conducting ring away from the liquid crystal panel, the heat dissipation cover is wrapped around the outer wall of the back frame, a heat-conducting inner ring and a heat-conducting outer ring are respectively fixed on the side of the heat-conducting ring close to the light guide plate, the diffusion sheet and the two light-enhancing sheets are all located inside the heat-conducting inner ring, the heat-conducting inner ring is located inside the heat-conducting outer ring, a heat transfer clamp is commonly connected between the heat-conducting inner ring and the heat-conducting outer ring, the sealing ring is arranged between the heat-conducting inner ring and the heat-conducting outer ring, and the outer wall of the sealing ring is bonded with the inner wall of the heat-conducting outer ring, the inner wall of the sealing ring is bonded with the outer wall of the heat-conducting inner ring, a plurality of mounting grooves are provided on the outer wall and the inner wall of the sealing ring, a heat transfer sheet is fixed in the mounting groove, the heat transfer sheet is clamped in the heat transfer clamp, the sealing ring is installed between the heat-conducting inner ring and the heat-conducting outer ring through the cooperation of the heat transfer clamp and the heat transfer sheet, the side of the sealing ring away from the liquid crystal panel is bonded with the side of the light guide plate close to the liquid crystal panel;

[0009] The heat generated by the light guide plate is transferred to the heat dissipation cover through the sealing ring, the heat transfer sheet, the heat transfer card, the heat conductive inner ring, the heat conductive outer ring and the heat conductive ring to achieve heat dissipation of the sealing ring.

[0010] Preferably, the sealing ring includes a ring 1 and a ring 2 which are connected in sequence, the outer wall of the ring 1 is fitted with the inner wall of the heat-conducting outer ring, the inner wall of the ring 1 is fitted with the outer wall of the heat-conducting inner ring, a plurality of mounting grooves are respectively provided on the inner wall and the outer wall of the ring 1, the sides of the heat-conducting inner ring and the heat-conducting outer ring close to the light guide plate are both fitted with the side of the ring 2 away from the light guide plate, the side of the ring 1 close to the light guide plate is concave, a heat transfer ring is fixed to the corresponding concave part of the ring 1, a convex ring is fixed to the side of the ring 2 close to the liquid crystal panel, the side of the convex ring close to the liquid crystal panel is a curved surface 1 convex toward the liquid crystal panel, the side of the heat transfer ring close to the ring 2 is provided with a curved surface 2 convex toward the liquid crystal panel, the curved surface 1 is tangent to the curved surface 2, and the side of the ring 1 close to the liquid crystal panel is an arc-shaped surface convex toward the liquid crystal panel.

[0011] Preferably, a plurality of heat transfer plates are fixed to the side of the heat transfer ring away from the light guide plate, the side of the heat transfer plate away from the heat transfer ring is fixedly connected to the side of the heat transfer sheet, and the heat transfer plate is arranged inside the ring.

[0012] Preferably, the heat transfer plate includes a bending portion, a vertical portion 1 and an arc portion 1 which are connected in sequence, the bending portion, the vertical portion 1 and the arc portion 1 are all fixed in the mounting groove, the side of the heat transfer plate away from the heat transfer ring is fixedly connected to the side of the arc portion 1, and the shape of the bending portion away from the light guide plate is adapted to the shape of the arc surface.

[0013] Preferably, the heat transfer card includes a sealing ring, a vertical part 2 and an arc-shaped part 2 connected in sequence, the sealing ring is fixed between the heat-conducting inner ring and the heat-conducting outer ring, the opposite surfaces of the vertical part 2 and the vertical part 1 fit together, and the opposite surfaces of the arc-shaped part 2 and the arc-shaped part 1 fit together.

[0014] Preferably, a convex portion is provided on a side of the arc-shaped portion 2 close to the arc-shaped portion 1, and a concave portion is provided on a side of the arc-shaped portion 1 close to the arc-shaped portion 2, and the concave portion fits with the convex portion.

[0015] Preferably, the outer wall of the heat-conducting inner ring and the inner wall of the heat-conducting outer ring are both fitted with spring sheets, and the spring sheets are fixed on a side of the arc-shaped portion 2 away from the arc-shaped portion 1.

[0016] Preferably, the space enclosed by the sealing ring, the heat-conducting ring, the heat-conducting inner ring and the heat-conducting outer ring is a storage cavity, which is filled with paraffin, and the paraffin is used for heat dissipation of the sealing ring. Several buffer bags are connected between the heat-conducting inner ring and the heat-conducting outer ring.

[0017] Preferably, the diameter of the middle portion of the buffer sac is larger than the diameters of both ends of the buffer sac.

[0018] Preferably, a plurality of heat conducting sheets are fixed to one side of the heat conducting ring close to the light guide plate, the heat conducting sheets extend into the storage cavity, and the heat conducting sheets are located between two adjacent buffer capsules.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the above scheme, through the arrangement of the sealing ring, the heat transfer sheet and the heat transfer clamp, the sealing ring is used to seal the light guide plate, and the heat transfer spring and the heat transfer clamp are used to clamp and position the sealing ring, so as to ensure that the sealing ring is accurately installed and the distance between the sides of the outer wall of the sealing ring and the side edges of the light guide plate is consistent, thereby preventing slight misalignment between the sealing ring and the light guide plate that affects light transmission. At the same time, the heat generated at the light guide plate can be transferred to the heat dissipation cover in time after being transferred to the sealing ring, thereby achieving effective heat dissipation of the sealing ring, reducing the influence of heat on the sealing ring, greatly extending the aging time of the sealing ring, ensuring the stable fit between the sealing ring and the light guide plate, making the light distribution more uniform, and greatly reducing the probability of light leakage between the sealing ring and the light guide plate, thereby effectively preventing the occurrence of bright edge phenomenon.

[0021] By setting the convex ring and the heat transfer ring, the second ring of the sealing ring fits with the light guide plate. When heat is transferred to the second ring, the heat of the second ring is transferred to the convex ring, causing the convex ring to expand slightly. During the slight expansion, the fitting area between the second curved surface on the convex ring and the first curved surface on the heat transfer ring gradually increases. By utilizing the cooperation between the convex ring and the heat transfer ring, on the one hand, space is provided for the expansion of the convex ring to prevent the second curved surface from excessively squeezing the light guide plate. On the other hand, the contact area between the convex ring and the heat transfer ring is increased by expansion. When the contact area is increased, the heat conduction capacity is improved, thereby further improving the heat dissipation capacity of the sealing ring, reducing the influence of heat on the sealing ring, and again extending the aging time of the sealing ring, thereby increasing the service life of the sealing ring.

[0022] By setting the arc surface, when the sealing ring is clamped between the heat-conducting inner ring and the heat-conducting outer ring, the sealing ring can be inserted between the heat-conducting inner ring and the heat-conducting outer ring by the guidance of the arc surface, thereby facilitating the assembly of the sealing ring, and when heat is transferred to the sealing ring, the ring 1 on the sealing ring expands slightly, and the fitting area between the arc surface of the ring 1 and the sealing ring gradually increases, which provides space for the expansion of the ring 1 to prevent excessive squeezing of the light guide plate. At the same time, the contact area between the arc surface and the sealing ring gradually increases, further improving the heat conduction capacity between the sealing ring and the sealing ring, thereby further improving the heat dissipation energy of the sealing ring, further reducing the influence of heat on the sealing ring, further extending the aging time of the sealing ring, and further increasing the service life of the sealing ring.

[0023] Through the setting of the storage cavity, paraffin is stored in the storage cavity. When heat is transferred to the storage cavity, the solid paraffin is converted into liquid paraffin, which absorbs heat through the conversion from solid to liquid, thereby further dissipating the heat to the sealing ring, further reducing the impact of heat on the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a cross-sectional view of a light guide plate of the present invention;

[0027] Figure 3 For the present invention Figure 2 A magnified view of the structure at center;

[0028] Figure 4 It is a cross-sectional view of the sealing ring of the present invention;

[0029] Figure 5 It is an enlarged view of the structure of the heat conducting sheet of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the storage cavity of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the installation groove of the present invention;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the heat transfer card of the present invention;

[0033] Fig. 9 This is an enlarged view of the spring piece structure of the present invention;

[0034] Fig.10 It is a schematic diagram of the three-dimensional structure of the raised portion of the present invention;

[0035] Fig.11 It is a schematic diagram of the three-dimensional structure of the heat transfer sheet of the present invention;

[0036] Fig.12 It is a schematic diagram of the two-position three-dimensional structure of the curved surface of the present invention;

[0037] Fig.13 It is a schematic diagram of a three-dimensional structure of a curved surface of the present invention.

[0038] [reference numerals]

[0039] 1. Back frame; 2. Reflector; 3. Light guide plate; 4. Diffuser; 5. Brightness enhancement sheet; 6. Heat conductive ring; 7. Heat dissipation cover; 8. Heat conductive inner ring; 9. Heat conductive outer ring; 10. Sealing ring; 11. Ring 1; 12. Ring 2; 13. Convex ring; 14. Heat transfer ring; 15. Heat transfer plate; 16. Mounting groove; 17. Heat transfer sheet; 18. Arc section 1; 19. Vertical section 1; 20. Bend section; 21. Concave section; 22. Heat transfer card; 23. Sealing ring; 24. Protruding section; 25. Vertical section 2; 26. Arc section 2; 27. Storage cavity; 28. Shrapnel; 29. ​​Buffer capsule; 30. Heat conductive sheet; 31. Liquid crystal panel; 32. Arc surface; 33. Side light source; 34. Curved surface 1; 35. Curved surface 2.

[0040] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0041] The following is a detailed description of a light uniform distribution backlight source structure for eliminating bright edge effect provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0042] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0043] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0044] like Figure 1-Figure 13 As shown, an embodiment of the present invention provides a light uniform distribution backlight structure for eliminating bright edge effect, including a back frame 1 and a liquid crystal panel 31, wherein a reflector 2, a light guide plate 3, a diffuser 4 and two light enhancement sheets 5 are sequentially stacked in the back frame 1, a side light source 33 is installed in the back frame 1, and the side light source 33 is attached to the side of the light guide plate 3, and further includes:

[0045] Sealing ring 10, a heat-conducting ring 6 is installed on the side of the back frame 1 close to the liquid crystal panel 31, and the liquid crystal panel 31 is installed on the side of the heat-conducting ring 6 away from the back frame 1. A heat dissipation cover 7 is fixed on the side of the heat-conducting ring 6 away from the liquid crystal panel 31, and the heat dissipation cover 7 is wrapped around the outer wall of the back frame 1, and a heat-conducting inner ring 8 and a heat-conducting outer ring 9 are fixed on the side of the heat-conducting ring 6 close to the light guide plate 3. The heat-conducting ring 6, the heat-conducting inner ring 8 and the heat-conducting outer ring 9 can be integrally cast and can be made of aluminum alloy, have high thermal conductivity, can timely and effectively conduct the heat generated at the sealing ring 10 to the heat dissipation cover 7, thereby timely and effectively dissipating the heat of the sealing ring 10, reducing the influence of heat on the sealing ring 10, greatly prolonging the aging time of the sealing ring 10, ensuring the stable fit of the sealing ring 10 and the light guide plate 3, making the distribution of light more uniform, greatly reducing the probability of light leakage between the sealing ring 10 and the light guide plate 3, thereby effectively preventing the occurrence of bright edge phenomenon, the diffuser 4 and the two light-enhancing sheets 5 are all located inside the heat-conducting inner ring 8, and the heat-conducting The inner ring 8 is located inside the heat-conducting outer ring 9, and a heat transfer clamp 22 is connected between the heat-conducting inner ring 8 and the heat-conducting outer ring 9. The sealing ring 10 is arranged between the heat-conducting inner ring 8 and the heat-conducting outer ring 9, and the outer wall of the sealing ring 10 is in contact with the inner wall of the heat-conducting outer ring 9, and the inner wall of the sealing ring 10 is in contact with the outer wall of the heat-conducting inner ring 8. The outer wall and the inner wall of the sealing ring 10 are both provided with a plurality of mounting grooves 16, and a heat transfer sheet 17 is fixed in the mounting groove 16, and the heat transfer sheet 17 is clamped in the heat transfer clamp 22. The sealing ring 10 is connected to the heat transfer clamp 22 by the heat transfer. The heat transfer piece 22 and the heat transfer sheet 17 are installed between the heat conductive inner ring 8 and the heat conductive outer ring 9. The side of the sealing ring 10 away from the liquid crystal panel 31 is in contact with the side of the light guide plate 3 close to the liquid crystal panel 31. The heat transfer sheet 17 is clamped at the heat transfer piece 22 to realize the assembly and positioning of the sealing ring 10, ensure the accurate installation of the sealing ring 10, and keep the distance between the side surfaces of the outer wall of the sealing ring 10 and the side edges of the light guide plate 3 consistent, thereby preventing the sealing ring 10 from being slightly misaligned with the light guide plate 3 to affect the light transmission.

[0046] The heat generated by the light guide plate 3 is transferred to the heat dissipation cover 7 through the sealing ring 10 , the heat transfer sheet 17 , the heat transfer clamp 22 , the heat conductive inner ring 8 , the heat conductive outer ring 9 and the heat conductive ring 6 , thereby dissipating the heat of the sealing ring 10 .

[0047] like Figure 3 , Fig.12 and Fig.13As shown, in this embodiment, the sealing ring 10 includes a ring 11 and a ring 2 12 connected in sequence, the outer wall of the ring 11 is fitted with the inner wall of the heat-conducting outer ring 9, the inner wall of the ring 11 is fitted with the outer wall of the heat-conducting inner ring 8, and a plurality of mounting grooves 16 are respectively provided on the inner wall and the outer wall of the ring 11, the side of the heat-conducting inner ring 8 and the heat-conducting outer ring 9 close to the light guide plate 3 are both fitted with the side of the ring 2 12 away from the light guide plate 3, the side of the ring 11 close to the light guide plate 3 is concave, and a heat transfer ring 14 is fixed to the corresponding concave part of the ring 11, and a convex ring 13 is fixed to the side of the ring 2 12 close to the liquid crystal panel 31, and the side of the convex ring 13 close to the liquid crystal panel 31 is facing the liquid crystal panel The heat transfer ring 14 is provided with a curved surface 1 34 convex in the direction of the liquid crystal panel 31, and a curved surface 2 35 convex in the direction of the liquid crystal panel 31 is arranged on the side of the heat transfer ring 14 close to the ring 2 12. The curved surface 1 34 is tangent to the curved surface 2 35. The side of the ring 11 close to the liquid crystal panel 31 is an arcuate surface 32 convex in the direction of the liquid crystal panel 31. When the heat generated at the light guide plate 3 is transferred to the sealing ring 10, the ring 2 12 of the sealing ring 10 is in contact with the light guide plate 3. When the heat is transferred to the ring 2 12, the heat of the ring 2 12 is transferred to the convex ring 13, so that the convex ring 13 expands slightly. During the slight expansion of the convex ring 13, the curved surface 2 35 on the convex ring 13 and the curved surface 1 3 on the heat transfer ring 14 are in contact with each other. The fitting area of ​​4 is gradually increased, and the heat conduction performance between the convex ring 13 and the heat transfer ring 14 is improved by the gradually increased area, so that the heat at the second ring 12 is timely transferred to the heat transfer ring 14, and is transferred to the heat transfer clamp 22 through the heat transfer ring 14 and the first ring 11, and then transferred to the heat dissipation cover 7 through the heat conduction ring 6, so as to achieve timely and effective heat dissipation of the second ring 12. At the same time, the fitting area of ​​the second curved surface 35 of the convex ring 13 and the first curved surface 34 of the heat transfer ring 14 can be gradually increased, providing space for the expansion of the convex ring 13, thereby preventing the second ring 12 from excessively squeezing the light guide plate 3 and affecting the uniform distribution of light at the light guide plate 3. At the same time, the design of the arc surface 32 is utilized. , it is convenient to insert the ring 11 between the heat-conducting inner ring 8 and the heat-conducting outer ring 9, thereby facilitating the assembly of the sealing ring 10, and the heat transferred to the heat transfer ring 14 will be transferred to the ring 11 through the heat transfer ring 14. The ring 11 will also expand slightly when heated. When the ring 11 expands slightly, the fitting area between the arc surface 32 of the ring 11 and the sealing ring 23 on the heat transfer clamp 22 gradually increases. The expansion of the ring 11 provides space to prevent the sealing ring 10 from excessively squeezing the light guide plate 3. At the same time, the gradually increased contact area between the arc surface 32 and the sealing ring 23 can improve the thermal conductivity of the sealing ring 10 and the heat transfer clamp 22, thereby facilitating the heat dissipation of the sealing ring 10.

[0048] like Figure 3 and Fig. 9As shown, in this embodiment, a plurality of heat transfer plates 15 are fixed to the side of the heat transfer ring 14 away from the light guide plate 3. The side of the heat transfer plate 15 away from the heat transfer ring 14 is fixedly connected to the side of the heat transfer sheet 17. The heat transfer plate 15 is arranged inside the ring 11. The heat transfer plate 15 is used to improve the thermal conductivity between the heat transfer ring 14 and the heat transfer sheet 17. On the one hand, the influence of heat on the ring 11 is reduced, and the thermal expansion of the ring 11 is reduced. On the other hand, the heat at the ring 2 12 is transferred to the heat transfer sheet 17 in time, so that the heat at the ring 2 12 is transferred out in time, which is conducive to the heat dissipation of the ring 2 12.

[0049] like Fig. 9 and Fig.10 As shown in the figure, in this embodiment, the heat transfer sheet 17 includes a bent portion 20, a vertical portion 19 and an arc portion 18 connected in sequence. The bent portion 20, the vertical portion 19 and the arc portion 18 are all fixed in the mounting groove 16. The side of the heat transfer plate 15 away from the heat transfer ring 14 is fixedly connected to the side of the arc portion 18. The shape of the side of the bent portion 20 away from the light guide plate 3 is adapted to the shape of the arc surface 32. When the sealing ring 10 is inserted between the heat conductive inner ring 8 and the heat conductive outer ring 9, the bent portion 20 of the heat transfer sheet 17 squeezes the heat conductive ring 14. The heat transfer clamp 22 causes the heat transfer clamp 22 to deform at the corresponding heat transfer sheet 17. When the ring 12 of the sealing ring 10 is fitted with the heat conductive inner ring 8 and the heat conductive outer ring 9, the heat transfer clamp 22 is clamped at the arc portion 18 of the heat transfer sheet 17, so that the sealing ring 10 can be positioned. When the heat of the sealing ring 10 is transferred to the heat transfer sheet 17, the heat transfer is achieved by the cooperation of the heat transfer sheet 17 and the heat transfer clamp 22, and the heat of the sealing ring 10 is timely transferred to the heat conductive ring 6 and the heat dissipation cover 7 for timely and effective heat dissipation.

[0050] like Figure 3 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, in this embodiment, the heat transfer card 22 includes a sealing ring 23, a second vertical portion 25 and a second arc portion 26 connected in sequence. The sealing ring 23 is fixed between the heat conductive inner ring 8 and the heat conductive outer ring 9. The second vertical portion 25 and the opposite surface of the vertical portion 19 are in contact with each other, and the second arc portion 26 and the opposite surface of the arc portion 18 are in contact with each other. The sealing ring 23 is made of metal copper and has good thermal conductivity. The second vertical portion 25 and the second arc portion 26 are made of phosphor copper. It has high elasticity and good thermal conductivity. The sealing ring 23 and the second vertical portion 25 are used to connect the sealing ring 23 with the second arc portion 26. The second arc portion 26 is elastic and can be deformed. The second arc portion 26 is clamped on the first arc portion 18 to achieve the clamping of the heat transfer plate 17, thereby achieving the positioning of the sealing ring 10. The thickness of the sealing ring 23 is greater than the thickness of the second vertical portion 25 and the second arc portion 26. The sealing ring 23 is not elastic and cannot be deformed.

[0051] like Figure 3 , Fig. 9 , Fig.10 and Fig.11 As shown, in the present embodiment, a protrusion 24 is provided on the side of the arc portion 26 close to the arc portion 18, and a recessed portion 21 is provided on the side of the arc portion 18 close to the arc portion 26, and the recessed portion 21 is fitted with the protrusion 24. By utilizing the fit between the protrusion 24 in the arc portion 26 and the recessed portion 21 in the arc portion 18, the sealing ring 10 is stably positioned to prevent the arc portion 18 and the arc portion 26 from being misaligned when the sealing ring 10 expands slightly, thereby ensuring the assembly stability and reliability of the sealing ring 10.

[0052] like Figure 3 As shown, in this embodiment, the outer wall of the heat-conducting inner ring 8 and the inner wall of the heat-conducting outer ring 9 are both fitted with spring pieces 28, which are fixed on the side of the arc-shaped portion 26 away from the arc-shaped portion 1 18. The spring piece 28 is arc-shaped, and the bending direction of the spring piece 28 is opposite to the bending direction of the arc-shaped portion 26. When the ring 11 expands slightly, it squeezes the arc-shaped portion 26 through the heat transfer sheet 17, so that the arc-shaped portion 26 is deformed and squeezes the spring piece 28. After the deformation, the spring piece 28 will gradually increase the contact area with the heat-conducting inner ring 8 and the heat-conducting outer ring 9, thereby improving the heat conduction capacity of the heat transfer sheet 17 and the arc-shaped portion 26, and further improving the heat dissipation capacity of the sealing ring 10.

[0053] like Figure 3 , Figure 5 and Figure 6 As shown, in the present embodiment, the space enclosed by the sealing ring 23, the heat-conducting ring 6, the heat-conducting inner ring 8 and the heat-conducting outer ring 9 is a storage cavity 27, and the storage cavity 27 is filled with paraffin, and the paraffin is used for heat dissipation of the sealing ring 10. A plurality of buffer capsules 29 are connected between the heat-conducting inner ring 8 and the heat-conducting outer ring 9. When the heat of the sealing ring 10 is transferred to the storage cavity 27 through the cooperation of the arc surface 32 and the sealing ring 23, the solid paraffin in the storage cavity 27 is heated and converted into liquid paraffin, and absorbs heat through the conversion from solid to liquid, and further dissipates the heat of the sealing ring 10. In the process of solid paraffin being converted into liquid, the volume will gradually increase, and the liquid paraffin squeezes the buffer capsule 29, causing the buffer capsule 29 to be concave inward. The inward concave buffer capsule 29 reduces the occupied area of ​​the buffer capsule 29 itself, thereby offsetting the gradually increased volume in the process of solid paraffin being converted into liquid.

[0054] like Figure 3 As shown, in the present embodiment, the diameter of the middle part of the buffer capsule 29 is larger than the diameter of the two ends of the buffer capsule 29, and the hollow part of the buffer capsule 29 is located in the middle position of the buffer capsule 29. When the buffer capsule 29 is recessed inwardly, the connection position between the buffer capsule 29 and the thermal conductive inner ring 8 and the thermal conductive outer ring 9 is prevented from pulling the recessed position of the buffer capsule 29, thereby preventing the thermal conductive inner ring 8 and the thermal conductive outer ring 9 from affecting the inward recess of the buffer capsule 29, making the deformation of the buffer capsule 29 smoother.

[0055] like Figure 5 and Figure 6 As shown, in the present embodiment, a plurality of heat conductive sheets 30 are fixed to one side of the heat conductive ring 6 close to the light guide plate 3, the heat conductive sheets 30 extend into the storage cavity 27, and the heat conductive sheets 30 are located between two adjacent buffer bags 29, and the heat conductive sheets 30 are used to increase the contact area between the paraffin and the heat conductive ring 6, thereby improving the thermal conductivity between the paraffin and the heat conductive ring 6, thereby facilitating the heat dissipation at the paraffin position.

[0056] Working principle: Align the sealing ring 10 between the heat-conducting inner ring 8 and the heat-conducting outer ring 9, insert the sealing ring 10 between the heat-conducting inner ring 8 and the heat-conducting outer ring 9, and the bent portion 20 of the heat transfer sheet 17 squeezes the arc portion 26 of the heat transfer clamp 22 to deform the arc portion 26. When the ring 12 of the sealing ring 10 fits with the heat-conducting inner ring 8 and the heat-conducting outer ring 9, the arc portion 26 fits with the arc portion 18 of the heat transfer sheet 17 under its own elastic force, and at the same time, the convex portion 24 of the arc portion 26 fits tightly with the concave portion 21 of the arc portion 18, thereby achieving The sealing ring 10 is now positioned by clamping, and then the sealing ring 10 is pressed onto the light guide plate 3, and then the heat conductive ring 6 and the heat dissipation cover 7 are fixed onto the back frame 1 to realize the connection between the backlight module and the back frame 1, thereby realizing the sealing of the light guide plate 3, and the sealing ring 10 is positioned by clamping by the cooperation of the heat transfer clamp 22 and the heat transfer sheet 17, ensuring that the position of the sealing ring 10 is accurately installed, so that the distance between each side of the outer wall of the sealing ring 10 and the side edge of the light guide plate 3 is consistent, thereby preventing a slight misalignment between the sealing ring 10 and the light guide plate 3 from affecting light transmission;

[0057] During the use of the light guide plate 3, heat is gradually generated at the light guide plate 3. When the heat is transferred to the sealing ring 10, the second ring 12 of the sealing ring 10 fits with the light guide plate 3. When the heat is transferred to the second ring 12, the heat of the second ring 12 is transferred to the convex ring 13, causing the convex ring 13 to expand slightly. During the slight expansion of the convex ring 13, the fitting area of ​​the second curved surface 35 on the convex ring 13 and the first curved surface 34 on the heat transfer ring 14 gradually increases, and the gradually increased area between the convex ring 13 and the heat transfer ring 14 is improved. The heat conduction performance of the convex ring 13 is improved, so that the heat at the second ring 12 is timely transferred to the heat transfer ring 14, and then transferred to the heat transfer card 22 through the heat transfer ring 14 and the first ring 11, and then transferred to the heat dissipation cover 7 through the heat conduction ring 6, so as to achieve timely and effective heat dissipation of the second ring 12. At the same time, the fitting area of ​​the second curved surface 35 of the convex ring 13 and the first curved surface 34 of the heat transfer ring 14 can be gradually increased, providing space for the expansion of the convex ring 13, thereby preventing the second ring 12 from excessively squeezing the light guide plate 3 and affecting the uniform distribution of light at the light guide plate 3;

[0058] The heat transferred to the heat transfer ring 14 will be transferred to the ring 11 through the heat transfer ring 14 itself and the heat transfer plate 15. The ring 11 will also expand slightly when heated. When the ring 11 expands slightly, the fitting area between the arc surface 32 of the ring 11 and the sealing ring 23 on the heat transfer clamp 22 gradually increases. The expansion of the ring 11 provides space to prevent the sealing ring 10 from excessively squeezing the light guide plate 3. At the same time, the gradually increasing contact area between the arc surface 32 and the sealing ring 23 can improve the heat conduction capacity between the sealing ring 10 and the heat transfer clamp 22, thereby facilitating the heat dissipation of the sealing ring 10. When the ring 11 expands slightly, the heat transfer sheet 17 squeezes the arc portion 26, causing the arc portion 26 to deform and squeeze the spring sheet 28. After the spring sheet 28 is deformed, it will gradually increase the contact area with the heat conductive inner ring 8 and the heat conductive outer ring 9, thereby improving the heat conduction capacity between the heat transfer sheet 17 and the arc portion 26, and further improving the heat dissipation capacity of the sealing ring 10.

[0059] When the heat of the sealing ring 10 is transferred to the storage cavity 27 through the cooperation of the arc surface 32 and the sealing ring 23, the solid paraffin in the storage cavity 27 is heated and transformed into liquid paraffin, and the heat is absorbed by the transformation from solid to liquid, and the sealing ring 10 is further cooled. In the process of solid paraffin being transformed into liquid, the volume will gradually increase, and the liquid paraffin squeezes the buffer capsule 29, causing the buffer capsule 29 to be concave inward. The inward concave of the buffer capsule 29 reduces the occupied area of ​​the buffer capsule 29 itself, so as to offset the gradually increased volume in the process of solid paraffin being transformed into liquid. At the same time, when the liquid paraffin is transformed into solid paraffin, the buffer capsule 29 can be restored to an undeformed state under the action of its own elasticity, so as not to affect the subsequent reuse.

[0060] When the sealing ring 10 needs to be replaced, remove the liquid crystal panel 31 from the thermally conductive ring 6, remove the thermally conductive ring 6 from the back frame 1, take the sealing ring 10 out of the back frame 1, and then hold the inner and outer walls of the ring 11 to pull the sealing ring 10, pull the sealing ring 10 out of the thermally conductive inner ring 8 and the thermally conductive outer ring 9, and then install the new sealing ring 10 in the thermally conductive inner ring 8 and the thermally conductive outer ring 9 using the above-mentioned installation method.

[0061] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A light uniformly distributed backlight source structure for eliminating bright edge effect, comprising a back frame (1) and a liquid crystal panel (31), wherein a reflector (2), a light guide plate (3), a diffuser (4) and two light enhancement plates (5) are sequentially stacked in the back frame (1), and a side light source (33) is installed in the back frame (1), and the side light source (33) is attached to the side of the light guide plate (3), characterized in that: Also includes: A sealing ring (10), a heat-conducting ring (6) is installed on the side of the back frame (1) close to the liquid crystal panel (31), the liquid crystal panel (31) is installed on the side of the heat-conducting ring (6) away from the back frame (1), a heat-dissipating cover (7) is fixed on the side of the heat-conducting ring (6) away from the liquid crystal panel (31), the heat-dissipating cover (7) is wrapped around the outer wall of the back frame (1), a heat-conducting inner ring (8) and a heat-conducting outer ring (9) are respectively fixed on the side of the heat-conducting ring (6) close to the light guide plate (3), the diffusion sheet (4) and the two brightness enhancement sheets (5) are all located inside the heat-conducting inner ring (8), the heat-conducting inner ring (8) is located inside the heat-conducting outer ring (9), a heat transfer clamp (22) is commonly connected between the heat-conducting inner ring (8) and the heat-conducting outer ring (9), and the sealing ring (10) is provided. The ring (10) is arranged between the heat-conducting inner ring (8) and the heat-conducting outer ring (9), and the outer wall of the sealing ring (10) is in contact with the inner wall of the heat-conducting outer ring (9), and the inner wall of the sealing ring (10) is in contact with the outer wall of the heat-conducting inner ring (8). The outer wall and the inner wall of the sealing ring (10) are both provided with a plurality of mounting grooves (16), and a heat transfer sheet (17) is fixed in the mounting groove (16). The heat transfer sheet (17) is clamped in the heat transfer clamp (22). The sealing ring (10) is installed between the heat-conducting inner ring (8) and the heat-conducting outer ring (9) through the cooperation of the heat transfer clamp (22) and the heat transfer sheet (17), and the side of the sealing ring (10) away from the liquid crystal panel (31) is in contact with the side of the light guide plate (3) close to the liquid crystal panel (31); The heat generated by the light guide plate (3) is transferred to the heat dissipation cover (7) through the sealing ring (10), the heat transfer sheet (17), the heat transfer clamp (22), the heat conductive inner ring (8), the heat conductive outer ring (9) and the heat conductive ring (6), thereby achieving heat dissipation of the sealing ring (10).

2. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 1, characterized in that: The sealing ring (10) comprises a ring 1 (11) and a ring 2 (12) which are connected in sequence, the outer wall of the ring 1 (11) is in contact with the inner wall of the heat-conducting outer ring (9), the inner wall of the ring 1 (11) is in contact with the outer wall of the heat-conducting inner ring (8), a plurality of mounting grooves (16) are respectively provided on the inner wall and the outer wall of the ring 1 (11), the side of the heat-conducting inner ring (8) and the heat-conducting outer ring (9) close to the light guide plate (3) are in contact with the side of the ring 2 (12) away from the light guide plate (3), the side of the ring 1 (11) close to the light guide plate (3) is concave, and the side of the ring 1 (11) corresponding to the concave shape A heat transfer ring (14) is fixed at the first ring; a convex ring (13) is fixed at a side of the second ring (12) close to the liquid crystal panel (31); a side of the convex ring (13) close to the liquid crystal panel (31) is a curved surface (34) convex in the direction of the liquid crystal panel (31); a side of the heat transfer ring (14) close to the second ring (12) is provided with a curved surface (35) convex in the direction of the liquid crystal panel (31); the curved surface (34) is tangent to the curved surface (35); and a side of the first ring (11) close to the liquid crystal panel (31) is an arcuate surface (32) convex in the direction of the liquid crystal panel (31).

3. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 2, characterized in that: A plurality of heat transfer plates (15) are fixed to the side of the heat transfer ring (14) away from the light guide plate (3); the side of the heat transfer plate (15) away from the heat transfer ring (14) is fixedly connected to the side of the heat transfer sheet (17); and the heat transfer plate (15) is arranged inside the ring one (11).

4. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 3, characterized in that: The heat transfer sheet (17) comprises a bent portion (20), a vertical portion (19) and an arc portion (18) which are connected in sequence; the bent portion (20), the vertical portion (19) and the arc portion (18) are all fixed in the mounting groove (16); a side of the heat transfer plate (15) away from the heat transfer ring (14) is fixedly connected to a side surface of the arc portion (18); and a side of the bent portion (20) away from the light guide plate (3) has a shape that matches the shape of the arc surface (32).

5. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 4, characterized in that: The heat transfer clamp (22) comprises a sealing ring (23), a second vertical portion (25) and a second arc-shaped portion (26) which are connected in sequence; the sealing ring (23) is fixed between the heat-conducting inner ring (8) and the heat-conducting outer ring (9); the second vertical portion (25) and the first vertical portion (19) are in contact with each other; and the second arc-shaped portion (26) and the first arc-shaped portion (18) are in contact with each other.

6. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 5, characterized in that: A convex portion (24) is provided on one side of the arc-shaped portion (26) close to the arc-shaped portion (18), and a concave portion (21) is provided on one side of the arc-shaped portion (18) close to the arc-shaped portion (26), and the concave portion (21) is in contact with the convex portion (24).

7. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 5, characterized in that: The outer wall of the heat-conducting inner ring (8) and the inner wall of the heat-conducting outer ring (9) are both fitted with spring sheets (28), and the spring sheets (28) are fixed on a side of the arc-shaped portion 2 (26) away from the arc-shaped portion 1 (18).

8. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 5, characterized in that: The space enclosed by the sealing ring (23), the heat-conducting ring (6), the heat-conducting inner ring (8) and the heat-conducting outer ring (9) is a storage cavity (27). The storage cavity (27) is filled with paraffin wax, which is used for heat dissipation of the sealing ring (10). A plurality of buffer capsules (29) are connected between the heat-conducting inner ring (8) and the heat-conducting outer ring (9).

9. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 8, characterized in that: The diameter of the middle portion of the buffer capsule (29) is greater than the diameters of the two ends of the buffer capsule (29).

10. The light uniform distribution backlight source structure for eliminating bright edge effect according to claim 8, characterized in that: A plurality of heat conducting sheets (30) are fixed to one side of the heat conducting ring (6) close to the light guide plate (3); the heat conducting sheets (30) extend into the storage cavity (27), and the heat conducting sheets (30) are located between two adjacent buffer capsules (29).

Images