Low-cost bottom backlight source

Abstract

The utility model discloses a low-cost bottom backlight source which comprises a light source frame, the light source frame comprises circumferential ring pieces and foot stools, every two adjacent circumferential ring pieces are detachably connected through one foot stool, and at least two assembling groove bodies are formed in the inner sides of the circumferential ring pieces; the diffusion plate is detachably arranged at the upper end part of the light source frame; light source lamp beads are arranged on the circuit board, and the periphery of the circuit board is inserted into the assembling groove body; the bottom plate is detachably arranged at the lower end part of the light source frame; and the heat-conducting double-sided adhesive plate is arranged between the circuit board and the bottom plate. According to the utility model, the machining process is greatly reduced, the machining can be basically realized, the bottom backlight source of any luminous area can be customized according to the requirements of customers, the cost of the bottom backlight source is greatly reduced, and the production period is shortened.

Description

Technical Field

[0001] The utility model relates to the field of backlight sources, in particular to a low-cost bottom backlight source. Background Art

[0002] Bottom backlight usually refers to the light source set at the bottom of the device (such as mobile phones, TVs, computer monitors, etc.), which is used to provide uniform lighting effects. The bottom backlight can make the screen content more vivid, improve contrast and color saturation, and provide a better viewing experience. Compared with traditional backlight methods, the bottom backlight can use energy more efficiently, thereby extending the battery life of the device.

[0003] The four sides of the existing traditional bottom surface light are all machined or machined from profiles, which is costly and time-consuming. Utility Model Content

[0004] The purpose of the present utility model is to overcome the above-mentioned defects in the prior art and provide a low-cost bottom backlight source, which greatly reduces the number of machining processes and can basically achieve no machining. The bottom backlight source of any luminous area can be customized according to customer requirements, which greatly reduces the cost of the bottom backlight source and shortens the production cycle.

[0005] To achieve the above objectives, the present invention provides a low-cost bottom backlight source, comprising:

[0006] A light source frame, comprising a perimeter member and a bracket, wherein two adjacent perimeter members are detachably connected via a bracket, and at least two assembly slots are formed on the inner side of the perimeter member;

[0007] a diffuser plate, the diffuser plate being detachably arranged on the upper end portion of the light source frame;

[0008] A circuit board, on which light source lamp beads are arranged, and the four sides of the circuit board are inserted into the assembly slot;

[0009] a bottom plate, the bottom plate being detachably arranged at the lower end portion of the light source frame;

[0010] A heat-conducting double-sided adhesive plate is arranged between the circuit board and the bottom plate.

[0011] Furthermore, the two assembly slots are respectively a first assembly slot and a second assembly slot, and the first assembly slot and the second assembly slot are arranged from top to bottom.

[0012] Furthermore, the tripod is provided with a first mounting hole and a second mounting hole. The first mounting hole and the second mounting hole are respectively provided on different sides of the tripod, and the axes thereof are projected to intersect perpendicularly. The first mounting hole and the first assembly groove are abutted against each other, and the axes thereof are co-linear. The second mounting hole and the second assembly groove are abutted against each other, and the axes thereof are co-linear. In this manner, the tripod can be connected to the transversely arranged perimeter member in the transverse direction by screws engaging the first mounting hole and the first assembly groove, and the tripod can be connected to the longitudinally arranged perimeter member in the longitudinal direction by screws engaging the second mounting hole and the second assembly groove.

[0013] Furthermore, the upper and lower ends of the tripod are respectively provided with a third mounting hole and a fourth mounting hole, the diffuser plate is provided with a fifth mounting hole that matches the third mounting hole, and the base plate is provided with a sixth mounting hole that matches the fourth mounting hole. The four corners of the multi-diffuser plate are secured by screws fitted into the third and fifth mounting holes, while the four corners of the base plate are secured by screws fitted into the fourth and sixth mounting holes.

[0014] Furthermore, the outer edge of the perimeter member is provided with an external slot, within which a movable nut is installed. This slot accommodates an M3 nut, which can be added as needed to serve as mounting holes, depending on the size of the light source and customer needs. This achieves a truly machine-free design for the four-strip perimeter of the open molded material.

[0015] Furthermore, the tripod is provided with a snap-on protrusion that matches the external slot body, and the snap-on protrusion is plugged into the external slot body. During assembly, the snap-on protrusions on the tripod can be first inserted into the corresponding external slot body, which can play a role in positioning and auxiliary load-bearing.

[0016] Furthermore, two symmetrically arranged limiting parts are formed in the middle of the external slot body. The limiting parts are provided so that when the nut is placed in the external slot body, the nut can only move left and right along the external slot body and will not move forward and backward, which is convenient for fixing other external components.

[0017] Furthermore, a first connecting groove and a second connecting groove are respectively formed at the upper and lower ends of the periphery member, and a seventh mounting hole and an eighth mounting hole are respectively provided on the diffuser plate and the bottom plate, which match the positions of the connecting grooves. This allows the four edges of the diffuser plate and the bottom plate to be connected to the periphery member, providing a more secure and stable connection.

[0018] Furthermore, the assembly slot forms a gradually tapering, trumpet-shaped lead-in portion, which is connected to an inwardly protruding abutment portion, which in turn is connected to an arc-shaped receiving portion. The lead-in portion facilitates insertion of components such as circuit boards, and the abutment portion compresses the inserted component, enhancing the stability of component installation.

[0019] Furthermore, a third assembly slot is provided at the inner lower end of the periphery, and a connection slot connected to the third assembly slot is provided on the lower side of the bracket. This allows for installation of a heat-conducting double-sided board, allowing heat from the circuit board to be transferred to the bottom plate for dissipation.

[0020] Compared with the prior art, the present invention has the following advantages: the peripheral ring member of the present invention is integrally formed from the profile of the drawing die, and a bracket is provided to connect the peripheral ring member, which reduces the machining process required for the connection of the four sides of the peripheral ring member, thereby reducing costs;

[0021] The corresponding positions on the ring parts and the tripod are slotted for installing the diffuser plate and the bottom plate, which reduces the drilling and tapping process of the upper bed and can be directly fixed with self-tapping screws;

[0022] In addition, an external slot for placing M3 nuts is opened on the outer side of the ring piece. Nuts can be added at will to serve as mounting holes according to the size of the light source and customer needs, thus achieving a truly non-machined design of the four ring pieces.

[0023] The tripod is also an integrated die-cast design. The tripod only needs to have the third and fourth mounting holes tapped where they are fixed to the diffuser and base. The base and diffuser only need to be laser cut to size and the fixing holes are cut, and then the screw holes are chamfered. Thermally conductive double-sided tape is used to secure the circuit board and base to reduce the number of screw holes required.

[0024] Therefore, the present invention greatly reduces the number of machining processes and can basically achieve no machining. The bottom backlight source of any luminous area can be customized according to customer requirements, which greatly reduces the cost of the bottom backlight source and shortens the production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of a low-cost bottom backlight source of the utility model;

[0027] Figure 2 yes Figure 1 Schematic diagram of the decomposition;

[0028] Figure 3 This is a schematic structural diagram of the circumferential ring member of the present utility model;

[0029] Figure 4 yes Figure 1 A magnified schematic diagram of area A;

[0030] Figure 5 It is a cross-sectional schematic diagram of the peripheral ring member of the present utility model;

[0031] Figure 6 It is a structural schematic diagram of the tripod of the present utility model.

[0032] Included in the diagram are:

[0033] 1. Light source frame; 11. Circumferential member; 111. Assembly slot; 1111. Introducing portion; 1112. Abutting portion; 1113. Accommodating portion; 112. First assembly slot; 113. Second assembly slot; 114. External slot; 115. Nut; 116. Limiting portion; 117. First connecting slot; 118. Second connecting slot; 119. Third assembly slot; 12. Tripod; 121. First mounting through hole; 122. Second mounting through hole; 123. Snap-fitting protrusion; 124. Third mounting hole; 125. Fourth mounting hole; 126. Connecting slot; 2. Diffuser; 21. Fifth mounting hole; 22. Seventh mounting through hole; 3. Circuit board; 4. Bottom plate; 41. Sixth mounting hole; 42. Eighth mounting through hole; 5. Thermally conductive double-sided adhesive sheet. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in this embodiment of the present invention to clearly and completely describe the technical solution in this embodiment of the present invention. Obviously, the embodiment described is only one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this utility model.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as described in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0037] See also Figures 1 to 6 , the embodiments of the present invention provide a low-cost bottom backlight source.

[0038] A low-cost bottom backlight source of this embodiment includes a light source frame 1, a diffuser plate 2, a circuit board 3, a bottom plate 4, and a heat-conducting double-sided adhesive plate 5:

[0039] The light source frame 1 includes a peripheral ring member 11 and a tripod 12. The peripheral ring member 11 is made of a stretched film profile, and the tripod 12 is integrally formed by a die-casting mold. In this embodiment, a total of four peripheral ring members 11 and four corresponding tripods 12 are provided. Two adjacent peripheral ring members 11 are detachably connected by a tripod 12. At least two assembly grooves 111 are provided on the inner side of the peripheral ring member 11. Figure 5 As shown, the assembly groove body 111 forms a gradually shrinking trumpet-shaped introduction portion 111, and the introduction portion 111 is connected to an inwardly protruding abutment portion 1112, and the abutment portion 1112 is connected to a receiving portion 1113 with an arc structure. In this embodiment, there are two assembly groove bodies 111, namely the first assembly groove body 112 and the second assembly groove body 113. The first assembly groove body 112 and the second assembly groove body 113 are arranged from top to bottom. It should be noted that the number and position of the assembly groove bodies 111 can be determined according to actual needs. For example, the assembly groove body 111 can be changed to an oblique setting or a longitudinal setting. Similarly, its number is also determined according to needs.

[0040] like Figure 3 and Figure 4 As shown, in this embodiment, the peripheral ring member 11 can be provided with an external groove body 114 on its outer side surface, which can be used to realize the installation of other external components. Specifically, an external groove body 114 is opened on the outer edge of the peripheral ring member 11, and a movable nut 115 is provided in the external groove body 114. For example, multiple nuts 115 can be placed from the openings on both sides of the external groove body 114. M3 nuts can be used and their models can be replaced according to actual needs; the nuts 115 serve as fixing holes. When in use, it is only necessary to use automatic screws to lock the external components on the nuts 115; as shown in FIG. Figure 6As shown, in order to prevent the nut 115 from falling off from the external slot body 114, two symmetrically arranged limiting portions 116 are formed in the middle of the external slot body 114. The limiting portions 116 are provided so that when the nut 115 is placed in the external slot body 114, the nut 115 can only move left and right along the external slot body 114, and will not move forward and backward, which is convenient for fixing other external components. At the same time, a snap-fitting protrusion 123 matching the external slot body 114 is provided on the tripod 12. The snap-fitting protrusion 123 is plugged into the external slot body 114. During assembly, the snap-fitting protrusions 123 on the tripod 12 can be first inserted into the corresponding external slot body 114, so that the left and right openings of the external slot body 114 are closed, so that the nut 115 cannot fall off from the opening, which can play a role in positioning and auxiliary load-bearing.

[0041] In order to realize the connection between the peripheral ring member 11 and the tripod 12, in this embodiment, as shown in FIG. Figure 6 As shown, a first mounting through hole 121 and a second mounting through hole 122 are provided on the tripod 12. The first mounting through hole 121 and the second mounting through hole 122 are respectively provided on different sides of the tripod 12 and the axis centers of the two are projected to intersect vertically. The first mounting through hole 121 and the first assembly groove 112 are against each other and the axis centers of the two are on the same straight line. The second mounting through hole 122 and the second assembly groove 113 are against each other and the axis centers of the two are on the same straight line. During assembly, it is only necessary to align the first mounting through hole 121 and the second mounting through hole 122 with the corresponding first assembly groove 112 and the second assembly groove 113. For example, when the first mounting through hole 121 is arranged horizontally and the second mounting through hole 122 is arranged vertically, the tripod 12 can be connected to the horizontally arranged peripheral ring member 11 in the horizontal direction by screws engaging the first mounting through hole 121 and the first assembly groove 112, and the tripod 12 and the longitudinally arranged peripheral ring member 11 can be connected in the longitudinal direction by screws engaging the second mounting hole and the second assembly groove 113.

[0042] The diffuser plate 2 and the bottom plate 4 are detachably mounted on the upper and lower ends of the light source frame 1, respectively. Specifically, the diffuser plate 2 and the bottom plate 4 are provided with a third mounting hole 124 and a fourth mounting hole 125 at the upper and lower ends of the tripod 12, respectively. A first connecting groove 117 and a second connecting groove 118 are provided at the upper and lower ends of the ring member 11, respectively. The diffuser plate 2 is provided with a fifth mounting hole 21 matching the third mounting hole 124, and the bottom plate 4 is provided with a sixth mounting hole 41 matching the fourth mounting hole 125. The diffuser plate 2 and the bottom plate 4 are provided with a first connecting groove 117 and a second connecting groove 118, respectively. The seventh mounting through hole 22 and the eighth mounting through hole 42, the third mounting hole 124 and the fifth mounting hole 21 cooperate to lock the four top corners of the diffuser plate 2, and the first connecting groove body 117 and the seventh mounting through hole 22 cooperate to realize the locking of the four edges of the diffuser plate 2. Similarly, the fourth mounting hole 125 and the sixth mounting hole 41 cooperate to realize the locking of the four top corners of the base plate 4, and the second connecting groove body 118 and the eighth mounting through hole 42 cooperate to realize the locking of the four edges of the base plate 4. During assembly, the diffuser plate 2 and the base plate 4 can be locked to the upper and lower ends of the light source frame 1 respectively by simply locking the corresponding through holes and groove bodies with screws.

[0043] The circuit board 3 is provided with a light source lamp bead, and the four sides of the circuit board 3 are inserted into the assembly groove 111. Specifically, in this embodiment, the circuit board 3 enters the introduction part 1111, and the introduction part 1111 is a gradually smaller trumpet mouth. After the circuit board 3 is inserted into the introduction part 1111, it is assisted by the introduction part 1111 to gradually hit the abutment part 1112 horizontally. The abutment parts 1112 are relatively protruding toward each other. When assembling, the circuit board 3 needs to be squeezed in with force to make the edge of the circuit board 3 reach the accommodating part 1113. At the same time, the abutment part 1112 will press the circuit board 3. Just clamp and lock it; in order to facilitate the insertion of the circuit board 3 and the stability after insertion, a thermally conductive double-sided adhesive plate 5 is provided between the circuit board 3 and the base plate 4 to dissipate heat from the circuit board 3 and to bond the circuit board 3 and the base plate 4. In order to better cooperate with the setting of the thermally conductive double-sided adhesive plate 5, a third assembly groove 119 is provided at the lower end of the inner side of the ring member 11, and a connecting groove 126 connected to the third assembly groove 119 is provided on the lower side of the tripod 12. The connecting groove 126 and the third assembly groove 119 are spliced ​​to form the installation area of ​​the thermally conductive double-sided adhesive plate 5.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-cost bottom backlight source, characterized in that: include: A light source frame (1), the light source frame (1) comprising a peripheral ring member (11) and a tripod (12), wherein two adjacent peripheral ring members (11) are detachably connected via a tripod (12), and at least two assembly slots (111) are provided on the inner side of the peripheral ring member (11); a diffusion plate (2), the diffusion plate (2) being detachably arranged on the upper end portion of the light source frame (1); A circuit board (3), wherein light source lamp beads are provided on the circuit board (3), and the four sides of the circuit board (3) are inserted into the assembly slot (111); a bottom plate (4), the bottom plate (4) being detachably arranged at the lower end portion of the light source frame (1); A heat-conducting double-sided adhesive plate (5), wherein the heat-conducting double-sided adhesive plate (5) is arranged between the circuit board (3) and the bottom plate (4).

2. The low-cost bottom backlight source according to claim 1, characterized in that: The two assembly troughs (111) are respectively a first assembly trough (112) and a second assembly trough (113), and the first assembly trough (112) and the second assembly trough (113) are arranged from top to bottom.

3. The low-cost bottom backlight source according to claim 2, characterized in that: A first mounting through hole (121) and a second mounting through hole (122) are provided on the tripod (12); the first mounting through hole (121) and the second mounting through hole (122) are respectively provided on different sides of the tripod (12) and the axis centers thereof are projected to intersect vertically; the first mounting through hole (121) and the first assembly slot (112) are against each other and the axis centers thereof are on the same straight line; the second mounting through hole (122) and the second assembly slot (113) are against each other and the axis centers thereof are on the same straight line.

4. The low-cost bottom backlight source according to claim 1, characterized in that: The upper end and the lower end of the tripod (12) are respectively provided with a third mounting hole (124) and a fourth mounting hole (125); the diffuser plate (2) is provided with a fifth mounting hole (21) matching the third mounting hole (124); and the bottom plate (4) is provided with a sixth mounting hole (41) matching the fourth mounting hole (125).

5. The low-cost bottom backlight source according to claim 1, characterized in that: An external groove body (114) is provided on the outer edge of the peripheral ring member (11), and a movable nut (115) is provided in the external groove body (114).

6. The low-cost bottom backlight according to claim 5, characterized in that: A clamping protrusion (123) matching the external slot body (114) is provided on the tripod (12), and the clamping protrusion (123) is plugged into the external slot body (114).

7. The low-cost bottom backlight according to claim 5, characterized in that: Two symmetrically arranged limiting portions (116) are formed in the middle of the externally connected slot body (114).

8. A low-cost bottom backlight source according to claim 1 or 6, characterized in that: A first connecting groove (117) and a second connecting groove (118) are respectively provided at the upper end and the lower end of the circumferential member (11), and a seventh mounting through hole (22) and an eighth mounting through hole (42) are respectively provided on the diffusion plate (2) and the bottom plate (4) so ​​as to match the position of the connecting groove (126).

9. The low-cost bottom backlight source according to claim 1, characterized in that: The assembly groove body (111) forms a gradually shrinking trumpet-shaped introduction portion (1111), the introduction portion (1111) is connected to an inwardly protruding abutment portion (1112), and the abutment portion (1112) is connected to a receiving portion (1113) with an arc structure.

10. The low-cost bottom backlight according to claim 1, characterized in that: A third assembly groove (119) is provided at the inner lower end of the circumferential member (11), and a connecting groove (126) communicating with the third assembly groove (119) is provided at the lower side of the tripod (12).

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