Backlight module

Abstract

The utility model discloses a backlight module which comprises a fixing frame and a light guide plate, the fixing frame comprises a bottom, a first side portion and a second side portion, and the first side portion and the second side portion are connected to the two opposite sides of the bottom respectively. In the direction parallel to the bottom, the end of the first side part extends in the direction close to the first side part to form a first U-shaped groove, and the end of the second side part extends in the direction close to the first side part to form a second U-shaped groove; the light guide plate is connected to the bottom, and at least part of the light guide plate extends into the first U-shaped groove. Compared with the prior art, the fixing frame has the advantages that the first side part and the second side part are arranged, the first side part and the second side part extend in the direction close to each other to form the first U-shaped groove and the second U-shaped groove, and the first side part and the second side part form the U-shaped folded edges, so that the strength of the fixing frame is greatly improved, the ultra-thin requirement of the frame is met, the product portability is improved, and the service life of the frame is prolonged. Product appearance design requirements are met, the strength of the fixing frame is improved, and deformation and damage of the fixing frame are avoided.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to display screen technical field, especially a backlight module. BACKGROUND

[0002] The backlight module is a key component of the liquid crystal display, and is mainly used for providing the backlight light source for the liquid crystal display panel. Nowadays, consumers have higher and higher requirements for the portability of electronic products such as mobile phones, tablet computers and notebook computers. Thinner backlight modules can reduce the overall thickness of these devices, facilitating user carrying.

[0003] And the traditional backlight module is a structure of glue frame / iron frame separation assembly, and the specific assembly mode is that the glue frame and the lower iron frame are clamped into an assembly. Since the traditional scheme is a glue frame and iron frame separation clamping design, the frame is thick, which does not meet the needs of the current mainstream market. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a backlight module which can narrow the frame and meet the thinning of the product.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A backlight module, comprising a fixed frame and a light guide plate, the fixed frame comprising a bottom, a first side and a second side, the first side and the second side being connected to opposite sides of the bottom respectively; along the direction parallel to the bottom, the end of the first side extends towards the first side to form a first U-shaped groove, and the end of the second side extends towards the first side to form a second U-shaped groove; the light guide plate is connected to the bottom and at least partially extends into the first U-shaped groove.

[0007] As one of the embodiments, the material of the fixed frame is plastic and metal.

[0008] As one of the embodiments, the backlight module comprises a filler, the filler is filled in the second U-shaped groove, and the second side is inserted into the filler.

[0009] As one of the embodiments, the backlight module comprises a light emitting element, the light emitting element is connected to the bottom and located in the first U-shaped groove, and the light emitting surface of the light emitting element faces the side surface of the light guide plate.

[0010] As one of the embodiments, the backlight module comprises a light reflecting element, the light reflecting element at least partially extends into the first U-shaped groove, and the gap between the light reflecting element and the light emitting element in the vertical direction is 0.07mm-0.1mm.

[0011] As one of the embodiments, the backlight module comprises an adhesive, and the light guide plate is provided with the adhesive between the bottom.

[0012] As one of the embodiments, the fixed frame comprises a third side and a fourth side, the third side and the fourth side are connected to opposite sides of the bottom respectively, the first side, the second side, the third side, the fourth side and the bottom enclose a mounting space, and the light guide plate is arranged in the mounting space.

[0013] As one of the embodiments, the third side and the fourth side extend along the thickness direction of the fixed frame.

[0014] As one of the embodiments, in the direction parallel to the bottom, the end of the third side extends towards the fourth side to form a third U-shaped groove, and the end of the fourth side extends towards the third side to form a fourth U-shaped groove.

[0015] As one of the embodiments, the height of the fixed frame at the first side is 1mm-1.5mm, the height of the fixed frame at the second side is 0.9mm-1mm, and the thickness of the bottom is 0.1mm-0.2mm.

[0016] The backlight module provided by the embodiment of the application comprises a fixed frame and a light guide plate, the fixed frame comprises a bottom, a first side and a second side, the first side and the second side are connected to opposite sides of the bottom respectively, in the direction parallel to the bottom, the end of the first side extends towards the first side to form a first U-shaped groove, and the end of the second side extends towards the first side to form a second U-shaped groove, the light guide plate is connected to the bottom and at least partially extends into the first U-shaped groove. In order to meet the ultra-thin design of the display screen frame, the thickness of the fixed frame is generally small, which easily leads to the decrease of the strength of the fixed frame and the problems of deformation and damage, therefore, the first side and the second side are arranged at opposite ends of the fixed frame, the first side and the second side extend in the direction of approaching each other to form the first U-shaped groove and the second U-shaped groove, and the first side and the second side both form U-shaped folded edges, and the structure of the U-shaped folded edges greatly increases the strength of the fixed frame. Compared with the prior art, the arrangement of the first side and the second side meets the ultra-thin requirement of the frame, improves the portability of the product, adapts to the appearance design requirement of the product, increases the strength of the fixed frame, and avoids the deformation and damage of the fixed frame. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure schematic diagram of the backlight module is shown;

[0018] Figure 2 A-A cross-sectional view of the backlight module is shown in the embodiment of the utility model;

[0019] Figure 3 A-A cross-sectional view of the backlight module is shown in the embodiment of the utility model; Figure 2 enlarged view of A;

[0020] Figure 4 A-A cross-sectional view of the backlight module is shown in the embodiment of the utility model; Figure 2 enlarged view of B;

[0021] Figure 5 A-A cross-sectional view of the backlight module is shown in the embodiment of the utility model;

[0022] Figure 6 A-A cross-sectional view of the backlight module is shown in the embodiment of the utility model; Figure 5 enlarged view of C;

[0023] Figure 7 A-A cross-sectional view of the backlight module is shown in the embodiment of the utility model; Figure 5 enlarged view of D;

[0024] Reference signs: 1, fixed frame; 11, bottom; 12, first side; 13, second side; 14, third side; 15, fourth side; 16, mounting space; 121, first U-shaped groove; 131, second U-shaped groove; 141, third U-shaped groove; 151, fourth U-shaped groove;

[0025] 2, light guide plate;

[0026] 3, filler;

[0027] 4, light emitting piece;

[0028] 5, light reflecting piece;

[0029] 6, adhesive. DETAILED DESCRIPTION

[0030] In the utility model, the terms "arrange", "have", "connect" should be understood broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication between two devices, elements or components. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0031] The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0033] Also, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0034] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application.

[0035] Referring to Figure 1 and Figure 2 The embodiment of the present application provides a backlight module, which comprises a fixed frame 1 and a light guide plate 2. The fixed frame 1 comprises a bottom 11, a first side 12 and a second side 13. The first side 12 and the second side 13 are respectively connected to the opposite sides of the bottom 11. In the direction parallel to the bottom 11, the end of the first side 12 extends towards the first side 12 to form a first U-shaped groove 121, and the end of the second side 13 extends towards the first side 12 to form a second U-shaped groove 131. The light guide plate 2 is connected to the bottom 11, and at least part of it extends into the first U-shaped groove 121.

[0036] In actual application, in order to meet the ultra-thin design of the display screen frame, the thickness of the fixed frame 1 is generally small, which can easily lead to the decrease of the strength of the fixed frame 1, and can easily cause deformation or damage and other problems, therefore, the first side part 12 and the second side part 13 are arranged at the opposite ends of the fixed frame 1, the first side part 12 and the second side part 13 both extend in the direction of approaching each other, forming the first U-shaped groove 121 and the second U-shaped groove 131, and the first side part 12 and the second side part 13 both form a U-shaped folded edge, the structure of the U-shaped folded edge greatly increases the strength of the fixed frame 1. Compared with the prior art, the arrangement of the first side part 12 and the second side part 13 not only meets the ultra-thin requirement of the frame, improves the portability of the product, and adapts to the appearance design requirement of the product, but also increases the strength of the fixed frame 1, avoiding the deformation and damage of the fixed frame 1.

[0037] In one embodiment, the material of the fixed frame 1 is plastic and metal. Specifically, the fixed frame 1 adopts a glue-iron integrated forming structure, and the traditional frame usually uses a glue frame and an iron frame to be connected in a split manner, while the fixed frame 1 of the present application adopts an integrated structure, and the glue-iron integrated structure usually adopts an injection molding process to tightly combine the glue frame and the iron frame together, and this combination makes the connection between the two very firm. Compared with the traditional connection methods such as screw connection, buckle connection and the like, the glue-iron integrated structure can avoid the structural instability caused by the loosening and falling off of the connection parts, and can improve the traditional frame to meet the thinning and narrow frame of the product. For example, the iron frame is injection molded into the inside or outside of the glue frame, and the positions of the glue frame and the iron frame are subject to specific schemes, which are not limited in the present application.

[0038] In addition, the iron frame itself has high strength and rigidity, and after the glue frame and the iron frame are tightly combined to form an integrated structure, the supporting effect of the iron frame can be fully played, and the toughness of the structure can also be increased to a certain extent. The two complement each other, and the overall strength is greatly improved. For example, in some electronic devices with high structural strength requirements, such as the housings or internal frames of tablet computers, notebook computers and the like, the glue-iron integrated structure can better withstand external force impact, extrusion and the like, and protect the internal electronic components. The rigidity of the iron frame can effectively resist the deformation of the structure, and the elasticity of the glue frame can absorb and buffer external force to a certain extent, reducing stress concentration. Especially in the case of long-term use or under the action of complex external force, the glue-iron integrated structure can maintain good shape stability and is not prone to deformation problems such as bending and twisting, thereby ensuring the normal use and performance stability of the device.

[0039] Referring to Figure 2 and Figure 3 , the backlight module further comprises a light emitting piece 4 connected to the bottom 11 and located in the first U-shaped groove 121, and the light emitting surface of the light emitting piece 4 faces the side surface of the light guide plate 2.

[0040] In practical application, the first side 12 is usually used to install the light emitting part 4, which is a part to generate light in the backlight module, and the main function of the light guide plate 2 is to evenly distribute the light emitted by the light emitting part 4 on the back of the whole liquid crystal display panel, the light emitting part 4 is installed in the first U-shaped groove 121, and the light emitting surface thereof faces the light entering side of the light guide plate 2, the light emitted by the light emitting part 4 enters from the light entering side of the light guide plate 2, and the light guide plate 2 can effectively guide the light on this side to the back of the whole panel, avoiding the loss of light in other directions, thereby reducing the brightness requirement of the backlight module on the light emitting part 4 to a certain extent, saving energy and reducing cost.

[0041] Referring to Figure 4 , the backlight module further comprises a filling part 3, the filling part 3 is filled in the second U-shaped groove 131, and the second side 13 is inserted into the filling part 3.

[0042] In practical application, the first side 12 is usually used to install the light emitting part 4, and is designed as a U-shaped structure, so it is relatively simple to make the second side 13 also as a U-shaped structure, which is beneficial to save economic cost and increase the strength of the frame at the same time. After the second side 13 is folded into a U-shaped structure, the fixed frame 1 is placed in the mold cavity, the hot melt plastic is filled into the second U-shaped groove 131 to form the filling part 3, and at the same time, the second side 13 is inserted into the filling part 3, further increasing the strength of the frame.

[0043] It should be noted that the length of the first side 12 is longer than the length of the second side 13, so that the space of the first U-shaped groove 121 is larger, which is beneficial to install the light emitting part 4 and the light guide plate 2.

[0044] Referring again to Figure 3 , the backlight module further comprises a reflecting part 5, the reflecting part 5 at least partially extends into the first U-shaped groove 121, and the gap between the reflecting part 5 and the light emitting part 4 in the vertical direction is 0.07mm-0.1mm.

[0045] In order to clearly describe Figure 2 , the X direction represents the horizontal direction, and the Y direction represents the vertical direction; the main function of the reflecting part 5 is to reflect the light which is not effectively used by the light guide plate 2, so that the light can enter the light guide plate 2 again, thereby improving the light utilization rate of the backlight module. Therefore, the reflecting part 5 is arranged on one side of the light emitting part 4, which is beneficial to the reflecting part 5 to reflect light, and the vertical gap between the reflecting part 5 and the light emitting part 4 is 0.07mm-0.1mm, which is beneficial to the light guide plate 2 to extend into the first U-shaped groove 121.

[0046] Referring again to Figure 3 , the backlight module comprises an adhesive 6, and the light guide plate 2 and the bottom 11 are provided with the adhesive 6.

[0047] In practical application, in order to strengthen the fixation of the light guide plate 2, the light guide plate 2 and the bottom 11 are pasted together by the adhesive 6, the connection stability of the light guide plate 2 is improved, and the light guide plate 2 is prevented from being squeezed to press the light emitting part 4 when the light guide plate 2 is subjected to external force, so that the light emitting part 4 is damaged, and the display screen cannot be normally used. Specifically, the adhesive 6 is located at the end of the light guide plate 2, which can effectively prevent the light guide plate 2 from colliding with the light emitting part 4, and at the same time, a gap is left between the light guide plate 2 and the light emitting part 4, which further prevents the collision between the two.

[0048] Again referring to Figure 3 and Figure 4 , the height of the fixed frame 1 at the first side 12 is 1mm~1.5mm, the height of the fixed frame 1 at the second side 13 is 0.9mm~1mm, and the thickness of the bottom 11 is 0.1mm~0.2mm.

[0049] In order to clearly describe, Figure 3 in which L1 is the height of the fixed frame 1 at the first side 12, and L2 is the thickness of the bottom 11, Figure 4 in which L3 is the height of the fixed frame 1 at the second side 13.

[0050] In practical application, the height of the first side 12 between 1mm~1.5mm can provide a more appropriate installation space 16 for the light emitting part 4, the light reflecting part 5 and the light guide plate 2, for example, the first side 12 can take the value of 1.2mm, the height of the second side 13 between 0.9mm~1mm, for example, the first side 12 can take the value of 0.9mm, and the smaller second side 13 is conducive to reducing the size of the frame, and the smaller thickness of the bottom 11 is helpful to realize the thin frame, for example, the thickness of the bottom 11 can take the value of 0.15mm.

[0051] Referring to Figure 5 , the fixed frame 1 includes a third side 14 and a fourth side 15, the third side 14 and the fourth side 15 are connected to opposite sides of the bottom 11 respectively, the first side 12, the second side 13, the third side 14, the fourth side 15 and the bottom 11 enclose to form an installation space 16, and the light guide plate 2 is arranged in the installation space 16.

[0052] In practical application, the fixed frame 1 has side parts around, the first side 12, the second side 13, the third side 14, the fourth side 15 and the bottom 11 enclose to form an installation space 16, the installation space 16 can be used for installing the light guide plate 2, and the first side 12, the second side 13, the third side 14 and the fourth side 15 can form a protection effect on the light guide plate 2, thereby increasing the strength of the backlight module.

[0053] It should be noted that the backlight module is usually connected with the liquid crystal panel, and the backlight module is usually located behind the liquid crystal panel and is mainly used for providing a backlight light source for the liquid crystal display panel. Therefore, the side portions are arranged around the fixed frame 1, the liquid crystal panel mounting position can be provided, the integration degree of the structure is improved, the size of the display screen is reduced, and the mainstream demand of consumers is met.

[0054] Referring to Figure 6 , the end of the third side portion 14 extends in a direction parallel to the bottom portion 11 and close to the fourth side portion 15, and a third U-shaped groove 141 is formed. The end of the fourth side portion 15 extends in a direction close to the third side portion 14, and a fourth U-shaped groove 151 is formed.

[0055] In actual application, the third side portion 14 and the fourth side portion 15 can also be made into a U-shaped structure, which can further increase the thickness of the fixed frame 1, and the filling piece 3 can also be added in the third U-shaped groove 141 and the fourth U-shaped groove 151. The third side portion 14 and the fourth side portion 15 are inserted into the filling piece 3, and the structural strength of the backlight module is improved.

[0056] Referring to Figure 7 , the third side portion 14 and the fourth side portion 15 extend in the thickness direction of the fixed frame 1. That is, the third side portion 14 and the fourth side portion 15 can not be made into a U-shaped structure, which can save production cost and improve economic benefit.

[0057] Different from the prior art, the embodiment of the application provides a backlight module, which comprises a fixed frame 1 and a light guide plate 2. The fixed frame 1 comprises a bottom portion 11, a first side portion 12 and a second side portion 13. The first side portion 12 and the second side portion 13 are respectively connected to opposite sides of the bottom portion 11. In a direction parallel to the bottom portion 11, the end of the first side portion 12 extends close to the first side portion 12, and a first U-shaped groove 121 is formed. The end of the second side portion 13 extends close to the first side portion 12, and a second U-shaped groove 131 is formed. The light guide plate 2 is connected to the bottom portion 11, and at least part of the light guide plate 2 extends into the first U-shaped groove 121. In order to meet the ultra-thin design of the display screen frame, the thickness of the fixed frame 1 is generally small, which easily leads to a decrease in the strength of the fixed frame 1 and easily causes problems such as deformation or damage. Therefore, the first side portion 12 and the second side portion 13 are arranged at opposite ends of the fixed frame 1. The first side portion 12 and the second side portion 13 extend in directions close to each other, and the first U-shaped groove 121 and the second U-shaped groove 131 are formed. The first side portion 12 and the second side portion 13 are formed into U-shaped folded edges, and the structure of the U-shaped folded edges greatly increases the strength of the fixed frame 1. Compared with the prior art, the arrangement of the first side portion 12 and the second side portion 13 meets the ultra-thin requirement of the frame, improves the portability of the product, adapts to the appearance design requirement of the product, increases the strength of the fixed frame 1, and avoids deformation and damage of the fixed frame 1.

[0058] The above description is merely that of the specific embodiments of the application, and it is to be understood that numerous modifications and enhancements can be made thereto without departing from the principles of the application.

Claims

1. A backlight module, characterized in that, The backlight module comprises: a fixed frame (1) comprising a bottom (11), a first side (12) and a second side (13), the first side (12) and the second side (13) are connected to opposite sides of the bottom (11) respectively, the end of the first side (12) extends towards the first side (12) in a direction parallel to the bottom (11), forming a first U-shaped groove (121), the end of the second side (13) extends towards the first side (12) in a direction parallel to the bottom (11), forming a second U-shaped groove (131); a light guide plate (2) connected to the bottom (11) and at least partially extending into the first U-shaped groove (121); the fixed frame (1) comprises a third side (14) and a fourth side (15), the third side (14) and the fourth side (15) are connected to opposite sides of the bottom (11) respectively, the end of the third side (14) extends towards the fourth side (15) in a direction parallel to the bottom (11), forming a third U-shaped groove (141), the end of the fourth side (15) extends towards the third side (14) in a direction parallel to the bottom (11), forming a fourth U-shaped groove (151).

2. The backlight module of claim 1, wherein, The material of the fixed frame (1) is plastic and metal.

3. The backlight module of claim 1, wherein, The backlight module comprises a filler (3), the filler (3) is filled in the second U-shaped groove (131), and the second side (13) is inserted into the filler (3).

4. The backlight module of claim 1, wherein, The backlight module comprises a light emitting member (4), the light emitting member (4) is connected to the bottom (11) and located in the first U-shaped groove (121), the light emitting surface of the light emitting member (4) faces the side surface of the light guide plate (2).

5. The backlight module of claim 4, wherein, The backlight module comprises a light reflecting member (5), the light reflecting member (5) at least partially extends into the first U-shaped groove (121), the gap between the light reflecting member (5) and the light emitting member (4) in the vertical direction is 0.07mm~0.1mm.

6. The backlight module of claim 1, wherein, The backlight module comprises an adhesive (6), the light guide plate (2) and the bottom (11) are provided with the adhesive (6).

7. The backlight module of claim 1, wherein, The first side (12), the second side (13), the third side (14), the fourth side (15) and the bottom (11) form an installation space (16), and the light guide plate (2) is arranged in the installation space (16).

8. The backlight module of claim 7, wherein, The third side (14) and the fourth side (15) extend in the thickness direction of the fixed frame (1).

9. The backlight module of claim 1, wherein, The height of the fixed frame (1) at the first side (12) is 1mm~1.5mm, the height of the fixed frame (1) at the second side (13) is 0.9mm~1mm, and the thickness of the bottom (11) is 0.1mm~0.2mm.

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