Backlight module

Abstract

A backlight module includes a lamp strip and a back cover. The lamp strip has a pair of protrusions and a groove between the pair of protrusions. The back cover has a side portion with a pair of curved cantilever arms and a cantilever between the pair of curved cantilever arms. The lamp strip is attached to the side portion with the pair of protrusions corresponding to the pair of curved cantilever arms and the cantilever corresponding to the groove.

Description

TECHNICAL FIELD

[0001] The present invention relates to a backlight module, and more particularly, to a backlight module with a light bar fixing structure. BACKGROUND

[0002] Currently, display technology is widely used in various electronic products to display the information and images needed. Among various display technologies, liquid crystal display (LCD) is widely used in various products. In the liquid crystal display, there are mainly a liquid crystal display panel and a backlight module. The backlight module mainly provides high brightness and high uniformity of light to the liquid crystal display panel.

[0003] Among various backlight modules, the side-in backlight module is still widely used in liquid crystal displays. The side-in backlight module mainly includes a light source module and a light guide plate. The light source module is arranged on the light-incident surface of the side of the light guide plate. The light source module emits light to the light guide plate, and then the light guide plate guides the light to the liquid crystal display panel.

[0004] In the light source module, a light bar is mainly used to emit the required light. In the conventional light source module, the light-emitting light bar is attached or locked to the required position of the back shell by using adhesive tape or screws, which often causes the position of the attached or locked light bar to be unstable and relatively have a large positional deviation, thereby causing the light source position deviation and making the display quality of the liquid crystal display unstable. In addition, the quality of the adhesive tape or screws varies greatly and the cost is relatively high. How to design a new structure to replace part of the adhesive tape or screws has become a problem that technicians in the field are eager to solve. SUMMARY

[0005] An object of the present invention is to provide a backlight module that can effectively and stably fix a light bar. The present invention provides a new backlight module design that can directly insert the light bar into a predetermined position, accurately fix the light bar in the predetermined position, and improve the display stability. Moreover, the adhesive tape or screws are not needed, and the manufacturing cost can be relatively reduced.

[0006] An embodiment of the present invention provides a backlight module, including a light bar and a back shell. The light bar has a pair of protrusions and a groove between the pair of protrusions. The back shell has a side portion with a pair of curved cantilever arms and a cantilevered protrusion between the pair of curved cantilever arms. The light bar is adjacent to the side portion, the pair of protrusions correspondingly inserted into the pair of curved cantilever arms, and the cantilevered protrusion correspondingly inserted into the groove.

[0007] In an embodiment, the light bar includes a light-emitting diode light bar.

[0008] In an embodiment, each of the protrusions has an arc-shaped side edge.

[0009] In one embodiment, the recess has an arcuate bottom.

[0010] In one embodiment, each of the curved cantilevers has a gap.

[0011] In one embodiment, the pair of protrusions correspondingly snap into the gaps of the pair of curved cantilevers.

[0012] In one embodiment, the overhang has an arcuate head.

[0013] In one embodiment, the overhang includes a tab.

[0014] In one embodiment, the overhang includes a bump.

[0015] Another embodiment of the present disclosure provides a backlight module including a back cover and a light bar. The back cover has a bottom plate, a side portion, and a cantilever portion. The side portion extends from the bottom plate in a direction away from the bottom plate and has a top end. The cantilever portion extends from the top end in a direction away from the side portion and is bent toward the bottom plate to form a limiting portion, wherein a first spacing is provided between a tail end of the limiting portion and the bottom plate. The light bar has a substrate extending between the bottom plate and the cantilever portion, wherein a protrusion is formed on a side edge of the substrate between the limiting portion and the side portion, the protrusion protrudes relative to other portions of the side edge and interferes with the limiting portion.

[0016] In one embodiment, the substrate has a first width at a position on the side edge other than the protrusion, and the first spacing is greater than the first width.

[0017] In one embodiment, the substrate has a second width at a position corresponding to the protrusion, and the first spacing is between the first width and the second width.

[0018] In one embodiment, the substrate is slidable relative to the side portion between a first position and a second position, when the substrate is in the first position, the protrusion is opposite and interferes with the limiting portion, and when the substrate is in the second position, the limiting portion is opposite and does not interfere with the position on the side edge other than the protrusion.

[0019] In one embodiment, the substrate is provided with light bar circuitry, and the light bar circuitry is provided in an area smaller than an area of the protrusion.

[0020] In one embodiment, the cantilever portion includes a pair of curved cantilevers.

[0021] In one embodiment, the pair of curved cantilevers has an overhang therebetween.

[0022] In one embodiment, the overhang includes a tab.

[0023] In one embodiment, the overhang includes a bump.

[0024] In one embodiment, the protrusion includes a pair of protrusions.

[0025] In one embodiment, the pair of protrusions has a groove therebetween.

[0026] Compared with the prior art, the backlight module of the present application uses a pair of protrusions of a light bar to correspondingly be clamped into a pair of curved cantilever arms of a back shell, and the cantilever protrusions of the back shell correspondingly are clamped into a groove of the light bar to form an interlaced clamping structure, which can accurately and stably fix the light bar at a predetermined position of the back shell, and relatively not easily deviate, thereby improving the stability of the liquid crystal display. Moreover, the light bar does not need to use adhesive tape or screws for fixation, and relatively can reduce manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a perspective view of a backlight module according to one embodiment of the present application.

[0028] Figure 2A FIG. 2 is a cross-sectional view of the backlight module of FIG. 1 along the cross-sectional line A-A’. Figure 1

[0029] Figure 2B FIG. 3 is a cross-sectional view of the backlight module of FIG. 1 along the cross-sectional line B-B’. Figure 1

[0030] Figure 3 FIG. 4 is a perspective view of a backlight module according to another embodiment of the present application.

[0031] Figure 4A FIG. 5 is a cross-sectional view of the backlight module of FIG. 4 along the cross-sectional line C-C’. Figure 3

[0032] Figure 4B FIG. 6 is a cross-sectional view of the backlight module of FIG. 4 along the cross-sectional line D-D’. Figure 3

[0033] Figures 5A-5B FIG. 7 is a flowchart of an assembly process of the backlight module according to one embodiment of the present application.

[0034] Figure 6 FIG. 8 is a cross-sectional view of a backlight module according to another embodiment of the present application.

[0035] Explanation of Main Element Symbols

[0036] 10 backlight module

[0037] 102 clamping structure

[0038] 200 light bar ​​​​

[0039] 202 substrate

[0040] 204 light emitting element

[0041] 206 dotted line

[0042] 208 side edge

[0043] 209 protrusion

[0044] 210 protrusion

[0045] 210a first protrusion

[0046] 210b second protrusion

[0047] 212 arc-shaped side

[0048] 220 recess

[0049] 222 arc-shaped bottom

[0050] 300 back shell

[0051] 302 bottom plate

[0052] 310 side portion

[0053] 312 top end

[0054] 320 cantilever portion

[0055] 320a first curved cantilever

[0056] 320b second curved cantilever

[0057] 322 extension portion

[0058] 324 stop portion

[0059] 326 tail end

[0060] 330 overhang

[0061] 330A tongue

[0062] 330B convex hull

[0063] 332 arc-shaped head

[0064] 334A extension portion

[0065] 334B extension portion

[0066] 336A clamping portion

[0067] 336B clamping portion

[0068] 400 light guide plate

[0069] 402 Light-incident surface

[0070] 404 Bottom surface

[0071] 406 Light-emitting surface

[0072] 410 Optical film

[0073] 500 Glue frame

[0074] h Height

[0075] G Gap

[0076] S1 First spacing

[0077] T Thickness

[0078] W1 First width

[0079] W2 Second width Detailed implementation manners

[0080] In various embodiments of the present invention, the terms used herein are for the purpose of describing specific embodiments only and are not restrictive. As used herein, unless the content clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms, including "at least one". As used herein, the term "a" includes any and all combinations of one or more of the related listed items.

[0081] In various embodiments of the present invention, "up", "down", "left", "right", "front" or "back" are used herein to describe the relationship between one element and another element, and are only used to illustrate the orientation presented in the drawings, not to limit their actual positions. The orientation of the elements in the device in the drawings is not limited by the flipping of the device. The directions of the D1 axis, D2 axis and D3 axis in the drawings are perpendicular to each other, for example, the directions of the X axis, Y axis and Z axis of a rectangular coordinate system, but their corresponding relationships are not limited.

[0082] Figure 1 It is a schematic three-dimensional structure diagram of a backlight module according to an embodiment of the present invention. Figure 2A It is a backlight module according to an embodiment of the present invention, along Figure 1 The cross-sectional schematic diagram of the cross-sectional line A-A'. Figure 2B It is a backlight module according to an embodiment of the present invention, along Figure 1 The cross-sectional schematic diagram of the cross-sectional line B-B'. As Figure 1 , Figure 2A And Figure 2BAs shown, the backlight module 10 of the present invention includes at least a light strip 200 and a back cover 300. The light strip 200 is, for example, a light-emitting diode (LED) light strip, but is not limited thereto. The light strip 200 may, for example, have a substrate 202 and a light-emitting element 204. The substrate 202 may, for example, be a printed circuit board (PCB), and the light-emitting element 204 may, for example, be a light-emitting diode (LED) element, which may be one or more, and the number is not limited and can be adjusted according to product requirements. The substrate 202 has a side edge 208. The light-emitting element 204 is fixed on the substrate 202, and the light emission of the light-emitting element 204 can be controlled by circuitry (not shown) within the substrate 202.

[0083] like Figure 1 As shown, the light strip 200 has a pair of protrusions 210 and a groove 220 located between the pair of protrusions 210. The pair of protrusions 210 constitute a protrusion 209, which protrudes relative to other parts of the side edge 208. The structural design of the pair of protrusions 210 and groove 220 helps to fix the position of the light strip 200. The pair of protrusions 210 and groove 220 can be integrally formed, for example, during the fabrication of the substrate 202. The design of the pair of protrusions 210 and groove 220 can be incorporated when designing the shape of the substrate 202, so that the substrate 202 has the pair of protrusions 210 and groove 220 when it is completed. Preferably, the wiring on the substrate 202 avoids the pair of protrusions 210, that is, no wiring passes through the area of ​​the pair of protrusions 210, for example... Figure 1 The area above the dotted line 206 prevents the protrusion 210 from being accidentally subjected to external stress that could affect the circuitry and consequently the light-emitting element 204. In other words, the substrate 202 is provided with LED strip circuitry (not shown), and the area of ​​the LED strip circuitry does not extend beyond the protrusion 209. Each protrusion 210 has a height h, which can be adjusted according to product design requirements, taking into account the size and thickness of the substrate, but is not limited thereto. The height h of the protrusion 210 can be, for example, between 0.1 mm and 5 mm. In one example, the height h of the protrusion 210 is, for example, 1.0 mm, but is not limited thereto. Each protrusion 210 has arc-shaped sides 212, located on the left and right sides of the pair of protrusions 210, respectively. Figure 1 As shown. The design of this curved side 212 makes it easier for the light strip 200 to slide into a fixed position, reducing sliding resistance. The groove 220 between the pair of protrusions 210 has a curved bottom 222. The design of this curved bottom 222 has a similar function, which can reduce sliding resistance, facilitate the assembly of the light strip 200, and make it easier to slide into a fixed position.

[0084] like Figure 1 and Figure 2AAs shown, the back shell 300 has a side portion 310, and the back shell 300 can also optionally have a bottom plate 302 connected to the side portion 310. The bottom plate 302 and the side portion 310 can be two separate components connected together, or can be integrally formed without limitation. In this embodiment, an integrally formed structure is used as an example, but the structure design is not limited thereto. As shown, Figure 1 As shown, the side portion 310 has a pair of curved cantilever arms 320, and a cantilever 330 between the pair of curved cantilever arms 320. The pair of curved cantilever arms 320 and the cantilever 330 are preferably integrally formed with the side portion 310, thereby increasing the strength of the curved cantilever arms 320 and the cantilever 330. The side portion 310 extends from the bottom plate 302 away from the bottom plate 302, and has a top end 312.

[0085] As shown, Figure 1 As shown, Figure 2A As shown, the pair of curved cantilever arms 320 form a cantilever portion 314. Each curved cantilever arm 320 has an extension portion 322 and a limiting portion 324. The limiting portion 324 has a tail end 326, and the tail end 326 of the limiting portion 324 is spaced apart from the bottom plate 302 by a first spacing S1. The extension portion 322 extends forward from the side portion 310 along the D2 axis, and the limiting portion 324 is bent downward from the extension portion 322, such that the limiting portion 324, the extension portion 322, and a portion of the side portion 310 form an approximately inverted U-shaped structure. In other words, the cantilever portion 314 extends from the top end 312 away from the side portion 310, and is bent toward the bottom plate 302 to form the limiting portion 324. The limiting portion 324 is spaced apart from the side portion 310 by a gap G, as shown, Figure 2A As shown, the protrusion 210 can be used to secure the light bar 200. The light bar 200 has a thickness T, which is slightly less than the gap G, such that the protrusion 210 can be correspondingly secured in the gap G of the curved cantilever arm 320, and the protrusion 210 is not easily loosened after being secured.

[0086] As shown, Figure 1 As shown, Figure 2B As shown, the cantilever 330 also extends forward from the side portion 310 along the D2 axis. In this embodiment, the cantilever 330 is exemplified by a tongue 330A. The tongue 330A has an extension portion 334A and a securing portion 336A. The extension portion 334A extends forward from the side portion 310 along the D2 axis, and the securing portion 336A is bent downward from the extension portion 334A, and the securing portion 336A is approximately in contact with the top surface of the groove 220 of the light bar 200, as shown. Figure 2B As shown, the securing portion 336A of the tongue 330A is secured in the groove 220 of the light bar 200, that is, the cantilever 330 is correspondingly secured in the groove 220, such that the light bar 200 is not easily slid left or right along the D1 axis after being secured. As shown, Figure 1As shown, the overhang 330 has an arc-shaped head 332 corresponding to the arc-shaped bottom 222 of the recess 220, which design makes the light bar 200 easier to assemble and less likely to slide after the overhang 330 is correspondingly clamped into the recess 220. The substrate 202 of the light bar 200 extends between the base plate 302 and the cantilevered portion 314, wherein the protrusion 209 on the side edge 208 of the substrate 202 is located between the limiting portion 324 and the side portion 310, the protrusion 209 protrudes relative to other portions of the side edge 208 and interferes with the limiting portion 324. The substrate 202 has a first width W1 at a position on the side edge 208 other than the protrusion 209, and the first spacing S1 is greater than the first width W1. In addition, the substrate 202 has a second width W2 at a position corresponding to the protrusion 209, and the first spacing S1 is between the first width W1 and the second width W2. The above design helps to fix the light bar 200.

[0087] As Figure 1 , Figure 2A and Figure 2BAs shown, the material of the back shell 300 can be metal or plastic, but is not limited thereto. The metal material can be stainless steel, aluminum, titanium, chromium, iron, cobalt, nickel, copper, zinc, or alloys and laminates thereof, which can have good protection and processability, but is not limited thereto. The metal material can be a metal plate of a designed shape, which is then bent to form the side portion 310, the curved cantilever 320, and the overhanging portion 330. The plastic material can be engineering plastic or high-strength general-purpose plastic, but is not limited thereto. The plastic material can be polyamide-imide (PAI), polybenzimidazole (PBI), polyetherimide (PEI), polyamide (PA), polycarbonate (PC), polyurethane (PU), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyether sulfone (PES), fiber reinforced plastic (FRP), poly(methyl methacrylate) (PMMA), polyether ether ketone (PEEK), or other suitable materials or combinations thereof, but is not limited thereto. The plastic material can be injected into a mold to form the side portion 310, the curved cantilever 320, and the overhanging portion 330. In a variant, if the structural strength of the back shell 300 is sufficient, the side portion 310 can only remain between the curved cantilever 320 and the bottom plate 302, which can reduce material usage and manufacturing cost.

[0088] Figure 3 A perspective view of a backlight module according to another embodiment of the present application. Figure 4A A backlight module according to another embodiment of the present application, along Figure 3 A cross-sectional view of the backlight module of FIG. 3, along the cross-sectional line C-C'. Figure 4B A backlight module according to another embodiment of the present application, along Figure 3 A cross-sectional view of the backlight module of FIG. 4, along the cross-sectional line D-D'. In this embodiment, the side portion 310 is formed by bending the bottom plate 302, and the curved cantilever 320 and the overhanging portion 330 are formed by bending the side portion 310. Figures 1-2BEmbodiments of the application will now be described, by way of example only, with reference to the accompanying drawings in which like reference numerals refer to like elements throughout. The drawings and description are not intended to be restrictive in nature. As Figure 3 , Figure 4A and Figure 4B In this embodiment, the protrusions 330 are replaced with protrusions 330B. The backlight module 10 can be applied to a thinner light bar 200, but is not limited thereto. In this embodiment, the backlight module 10 includes at least a light bar 200 and a back cover 300. The light bar 200 is, for example, an LED light bar, but is not limited thereto. The light bar 200 can have, for example, a substrate 202 and light emitting elements 204. The substrate 202 is, for example, a printed circuit board (PCB), and the light emitting elements 204 are, for example, light emitting diode (LED) elements. The number of light emitting elements 204 can be one or more, and is not limited thereto. The number of light emitting elements 204 can be adjusted according to product requirements. The light emitting elements 204 are fixed to the substrate 202, and the light emitting elements 204 can be controlled to emit light by a circuit (not shown) in the substrate 202.

[0089] As shown in Figure 1 and Figure 3 The light bar 200 has a pair of protrusions 210 and a groove 220 between the pair of protrusions 210. The pair of protrusions 210 forms a protruding portion 209 that protrudes relative to other portions of the side edge 208. The structure of the pair of protrusions 210 and the groove 220 can help fix the position of the light bar 200. The pair of protrusions 210 and the groove 220 can be integrally formed when the substrate 202 is manufactured. When the shape of the substrate 202 is designed, the pair of protrusions 210 and the groove 220 can be designed at the same time, so that the substrate 202 has the pair of protrusions 210 and the groove 220 when it is completed. The circuit in the substrate 202 is preferably designed to avoid the pair of protrusions 210, that is, no circuit passes through the pair of protrusions 210. For example, the area above the dashed line 206 in Figure 3 can avoid the pair of protrusions 210 from being inadvertently stressed by external forces, which can affect the circuit and the light emitting elements 204. In other words, the light bar circuit (not shown) is arranged on the substrate 202, and the range of the light bar circuit is smaller than the range of the protruding portion 209. Each protrusion 210 has a height h, which can be adjusted according to product design requirements, and can be adjusted according to the size and thickness of the substrate, but is not limited thereto. The height h of the protrusion 210 is, for example, between 0.1 mm and 5 mm. In an example, the height h of the protrusion 210 is, for example, 1.0 mm, but is not limited thereto. Each protrusion 210 has an arc-shaped side edge 212 on the left and right sides of the pair of protrusions 210, as shown in Figure 3 The design of the arc-shaped side edge 212 can make the light bar 200 more easily slide to the fixed position and reduce sliding resistance. The groove 220 between the pair of protrusions 210 has an arc-shaped bottom 222, which has a similar function to reduce sliding resistance and facilitate assembly of the light bar 200 and make it more easily slide to the fixed position.

[0090] like Figure 3 and Figure 4A As shown, the back shell 300 has a side portion 310. Alternatively, the back shell 300 may optionally have a bottom plate 302 connected to the side portion 310. The bottom plate 302 and the side portion 310 can be two separate components connected together, or they can be integrally formed; this is not limited. This embodiment only illustrates an integrally formed structure and does not limit its structural design. Figure 3 As shown, the side portion 310 has a pair of curved cantilever arms 320 and a cantilever protrusion 330 located between the pair of curved cantilever arms 320. The pair of curved cantilever arms 320 and the cantilever protrusion 330 are preferably integrally formed with the side portion 310, thereby increasing the strength of the curved cantilever arms 320 and the cantilever protrusion 330. The side portion 310 extends from the base plate 302 in a direction away from the base plate 302 and has a top end 312.

[0091] like Figure 3 and Figure 4A As shown, a pair of curved cantilever arms 320 constitute a cantilever portion 314. Each curved cantilever arm 320 has an extension portion 322 and a limiting portion 324. The limiting portion 324 has a tail end 326, and a first gap S1 is formed between the tail end 326 of the limiting portion 324 and the base plate 302. The extension portion 322 extends forward from the side portion 310 along the D2 axis, and the limiting portion 324 bends downward from the extension portion 322, so that the limiting portion 324, the extension portion 322, and a portion of the side portion 310 form an approximately inverted U-shaped structure. In other words, the cantilever portion 314 extends from the top end 312 away from the side portion 310 and bends towards the base plate 302 to form the limiting portion 324. A gap G is formed between the limiting portion 324 and the side portion 310, such as... Figure 4A As shown, a protrusion 210 can be used to hold the light strip 200 in place. The light strip 200 has a thickness T, which is approximately slightly smaller than the gap G, so that the protrusion 210 can be correspondingly engaged in the gap G of the curved cantilever 320, and the protrusion 210 is not easy to loosen after being engaged.

[0092] like Figure 3 and Figure 4B As shown, the protrusion 330 also extends forward from the side portion 310 along the D2 axis. In this embodiment, the protrusion 330 is illustrated as a convex hull 330B. The convex hull 330B has an extension portion 334B and a retaining portion 336B. The extension portion 334B extends forward from the side portion 310 along the D2 axis, and the retaining portion 336B protrudes downward from the extension portion 334B, and the retaining portion 336B approximately abuts against the top surface of the groove 220 of the light strip 200, such as... Figure 4BAs shown. The convex hull 330B approximates a convex dot and can be manufactured in a smaller size using machining or molding. Because the retaining part 336B of the convex hull 330B engages with the groove 220 of the light strip 200, that is, the overhanging convex 330 correspondingly engages with the groove 220, the light strip 200 is less likely to slide left or right along the D1 axis after being engaged. For example... Figure 3 As shown, the overhang 330 (i.e., the protrusion 330B) has an arc-shaped head 332, corresponding to the arc-shaped bottom 222 of the groove 220. This structural design makes the light strip 200 easier to assemble and less prone to slippage after the overhang 330 is correspondingly inserted into the groove 220. The substrate 202 of the light strip 200 extends between the base plate 302 and the cantilever portion 314, wherein the protrusion 209 on the side edge 208 of the substrate 202 is located between the limiting portion 324 and the side portion 310. The protrusion 209 protrudes relative to the other parts of the side edge 208 and interferes with the limiting portion 324. The substrate 202 has a first width W1 at the position of the non-protrusion 209 on the side edge 208, and the first spacing S1 is greater than the first width W1. In addition, the substrate 202 has a second width W2 at the position corresponding to the protrusion 209, and the first spacing S1 is between the first width W1 and the second width W2. The above structural design helps to fix the light strip 200.

[0093] like Figure 3 , Figure 4A and Figure 4B As shown, the back cover 300 can be made of materials such as metal or plastic, but is not limited to these. If the back cover 300 is made of metal, for example, a metal plate can be pre-cut into the designed shape, and then the metal plate can be bent using a forming process to form the required side 310, cantilever 320, and overhang 330. For an explanation of metal and plastic materials, please refer to the aforementioned section on... Figure 1 The relevant descriptions will not be repeated here. In a variant embodiment, if the structural strength of the back shell 300 is sufficient, the side 310 of the back shell 300 can retain only the portion between the curved cantilever 320 and the base plate 302, removing other less demanding portions, which can relatively reduce material usage and lower manufacturing costs.

[0094] Figures 5A-5B This is a schematic diagram illustrating the assembly process of a backlight module according to an embodiment of the present invention. In this embodiment, as described above... Figures 1-4B The embodiments are similar, and the same reference numerals can be used for reference, but are not limiting. In this embodiment, the overhang 330 is illustrated using a convex hull 330B. Figure 5AAs shown, first, the moving light bar 200 is moved backward along the D2 axis direction to approach the side portion 310 of the back shell 300. The moving light bar 200 is moved rightward along the D1 axis direction (or leftward) to avoid the substrate 202 of the subsequent light bar 200 or the pair of protrusions 210 (including the first protrusion 210a and the second protrusion 210b) of the light bar 200 from contacting the pair of curved cantilever arms 320 (including the first curved cantilever arm 320a and the second curved cantilever arm 320b) of the side portion 310. Then, the moving light bar 200 is moved backward along the D2 axis direction to completely approach the side portion 310 of the back shell 300, and the pair of curved cantilever arms 320 does not contact the substrate 202 of the light bar 200 or the pair of protrusions 210 of the light bar 200. The moving light bar 200 is moved leftward along the D1 axis direction, as indicated by the arrow above the protrusions 210, to allow the protrusions 210 of the light bar 200 to be engaged in the gaps G of the curved cantilever arms 320. As shown, Figure 5B As shown, the light bar 200 is continuously moved along the arrow direction until the two protrusions 210 correspond to the two curved cantilever arms 320 (for example, the first protrusion 210a corresponds to the first curved cantilever arm 320a, and the second protrusion 210b corresponds to the second curved cantilever arm 320b), and the overhang 330 corresponds to the groove 220. The two protrusions 210 and the groove 220 of the light bar 200 and the two curved cantilever arms 320 and the overhang 330 of the side portion 310 form the engagement structure 102, which is accurately and stably fixed in the D1 axis direction, the D2 axis direction, and the D3 axis direction, and is not easily slidable. The substrate 202 of the light bar 200 can slide relative to the side portion 310 between the first position and the second position. When the substrate 202 is located at the first position (as shown), Figure 5B When the substrate 202 is located at the second position (as shown), Figure 5A The limiting portion 324 is opposite to the position of the non-protrusion 209 on the side edge 208 and does not interfere with the non-protrusion 209. Therefore, the light emitting position and direction of the light bar 200 can be well controlled, thereby improving the display stability of the liquid crystal display.

[0095] Figure 6 A cross-sectional structure of a backlight module according to another embodiment of the present application is shown. In this embodiment, similar reference numerals can be used for reference to the embodiment described above, but are not limited thereto. As shown, Figures 1-5B Figure 3 Figure 5B Figure 6 ​​​As shown, the backlight module 10 of the present invention includes at least a light strip 200 and a back cover 300. The backlight module 10 further includes a light guide plate 400, which has a light incident surface 402. The light strip 200 is disposed adjacent to the light incident surface 402, and the light-emitting element 204 of the light strip 200 faces the light incident surface 402, allowing the light emitted by the light-emitting element 204 to enter the light incident surface 402 of the light guide plate 400 and into the light guide plate 400. The light is reflected by the bottom surface 404 of the light guide plate 400 and guided to the light emitting surface 406 of the light guide plate 400, thereby providing light to the liquid crystal display panel (not shown) above for displaying the desired image. The above-mentioned parts are well known to those skilled in the art and will not be described in detail here. An optical film 410, such as a light diffusion film, may be selectively disposed between the light guide plate 400 and the liquid crystal display panel to improve the uniformity of the emitted light.

[0096] like Figures 3-6 As shown, the light strip 200 is, for example, a light-emitting diode (LED) light strip, but is not limited thereto. The light strip 200 may, for example, have a substrate 202 and a light-emitting element 204. The light-emitting element 204 is, for example, a light-emitting diode (LED) element, and may be one or more, with no limit on the number, and can be adjusted according to product requirements. The light strip 200 has a pair of protrusions 210 and a groove 220 located between the pair of protrusions 210. The back cover 300 has a side portion 310, and the back cover 300 may also optionally have a base plate 302 connected to the side portion 310. The side portion 310 has a pair of curved cantilever arms 320 and a protrusion 330 located between the pair of curved cantilever arms 320. The two protrusions 210 and the groove 220 of the light strip 200, together with the two curved cantilever arms 320 and the protrusion of the side portion 310, form a locking structure 102. If the light strip 200 is elongated, the locking structure 102 is not limited to one; multiple locking structures 102 can be selectively provided between the light strip 200 and the side portion 310, and a certain spacing can be provided between the locking structures 102 to improve the stability of the light strip 200 on the side portion 310. Further detailed descriptions of the light strip 200 and the back cover 300 can be found in the descriptions of the foregoing embodiments, and will not be repeated here. Additionally, a frame 500 can be selectively provided on the outer side of the side portion 310 to enhance the fixation of the optical film 410 and the light guide plate 400. This is well known to those skilled in the art and will not be described further.

[0097] In summary, the backlight module of the present invention utilizes a pair of protrusions of the LED strip to correspondingly engage with a pair of curved cantilever arms of the back shell, and the cantilever protrusions of the back shell to correspondingly engage with the grooves of the LED strip, forming an interlocking locking structure. This structure can precisely and stably fix the LED strip in a predetermined position on the back shell, making it less prone to displacement, thereby improving the light output stability of the backlight module. Moreover, the LED strip does not require the use of tape or screws for fixing, which can reduce manufacturing costs.

[0098] The present application has been described by the above related embodiments, however, the above embodiments are only examples for implementing the present application. It must be pointed out that the disclosed embodiments do not limit the scope of the present application. On the contrary, modifications and equivalents included in the spirit and scope of the claimed scope of the application file are included in the scope of the present application.

Claims

1. A backlight module, characterized in that, include: A light strip having a pair of protrusions and a groove between the pair of protrusions, wherein each of the protrusions has an arcuate side; and A back cover has a side portion having a pair of curved cantilever arms and a protrusion located between the pair of curved cantilever arms, wherein the light strip is abutted against the side portion, the pair of protrusions are correspondingly engaged in the pair of curved cantilever arms, and the protrusion is correspondingly engaged in the groove.

2. The backlight module as described in claim 1, characterized in that, The light strip includes a light-emitting diode (LED) light strip.

3. The backlight module as described in claim 1, characterized in that, The groove has an arc-shaped bottom.

4. The backlight module as described in claim 1, characterized in that, Each of these curved cantilever arms has a gap.

5. The backlight module as described in claim 4, characterized in that, The pair of protrusions are respectively engaged in the gap between the pair of curved cantilever arms.

6. The backlight module as described in claim 1, characterized in that, The overhang has an arc-shaped head.

7. The backlight module as described in claim 1, characterized in that, The overhang includes a tongue.

8. The backlight module as described in claim 1, characterized in that, The overhang includes a convex hull.

9. A backlight module, characterized in that, Includes: one back cover, one LED strip. The back shell has: One base plate; One side portion extends from the base plate in a direction away from the base plate and has a top end; and A cantilever portion extends from the top end in a direction away from the side portion and bends towards the base plate to form a limiting portion, wherein a first gap is formed between a tail end of the limiting portion and the base plate; and The light strip has a substrate extending between the base plate and the cantilever portion, wherein a protrusion is formed on one side edge of the substrate between the limiting portion and the side portion, the protrusion protrudes relative to other parts of the side edge and interferes with the limiting portion. The protrusion includes a pair of protrusions with a groove between them, and each protrusion has an arc-shaped side. The cantilever portion includes a pair of curved cantilever arms and a cantilevered protrusion located between the pair of curved cantilever arms. The pair of protrusions are respectively engaged in the pair of curved cantilever arms, and the cantilever protrusion is respectively engaged in the groove.

10. The backlight module as described in claim 9, characterized in that, The substrate has a first width at a position on the side edge other than the protrusion, and the first spacing is greater than the first width.

11. The backlight module as described in claim 10, characterized in that, The substrate has a second width at the position corresponding to the protrusion, and the first spacing is between the first width and the second width.

12. The backlight module as described in claim 9, characterized in that, The substrate can slide relative to the side portion between a first position and a second position. When the substrate is in the first position, the protrusion is opposite to and interferes with the limiting portion. When the substrate is in the second position, the limiting portion is opposite to the non-protrusion position on the side edge and does not interfere with it.

13. The backlight module as described in claim 9, characterized in that, The substrate is provided with LED strip lines, but the area covered by the LED strip lines does not extend beyond the area of ​​the protrusion.

14. The backlight module as described in claim 9, characterized in that, The overhang includes a tongue.

15. The backlight module as described in claim 9, characterized in that, The overhang includes a convex hull.

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