Optical film fixing structure and liquid crystal module

Abstract

The invention relates to the technical field of display devices, and discloses an optical film fixing structure and a liquid crystal module, the optical film fixing structure comprises a back plate, a limiting protrusion and a frame body, and multi-point positioning of the optical film in the horizontal direction and the vertical direction is achieved in the installation process of the optical film; therefore, the optical film is effectively prevented from shifting due to external force in the transportation or carrying process; the limiting protrusions extend upwards and are arranged in the limiting holes of the optical film in a penetrating mode to be matched with the lug hanging parts arranged on the edges of the optical film and the positioning grooves in the back plate, a stable space limiting structure can be formed, and the installation stability of the optical film is improved. Through cooperative cooperation of the back plate, the limiting protrusions and the frame body, accurate positioning and reliable fixing of the optical film are achieved, the problem that in the prior art, in the liquid crystal module transporting and carrying process, the optical film is prone to displacement is solved, and the optical performance stability and the vibration resistance of the whole machine are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display devices, in particular to an optical film fixing structure and a liquid crystal module. BACKGROUND

[0002] With the continuous development of display technology, liquid crystal display devices (LCD) are widely used in television sets, monitors, notebook computers, tablet computers and mobile terminals and other products. As the core component of the liquid crystal display device, the structure and assembly method of the liquid crystal module directly affect the display effect and product yield.

[0003] Since the liquid crystal screen itself does not have the ability of self-luminous, it needs to set up a backlight module to provide the necessary light source. In the prior art, the backlight module usually includes multiple optical films, such as diffusion sheets, light enhancement sheets and composite films, etc. These film sheets are stacked and arranged inside the hardware backboard, which is used to collect and uniformly distribute light, thereby improving the display brightness and uniformity of the liquid crystal panel.

[0004] In the actual assembly process, in order to prevent the displacement of multiple optical films after stacking, it is necessary to fix them in the hardware backboard. The common fixing structure in the prior art is to pre-set several notches on the hardware backboard, and the optical film is provided with an "ear" structure at the corresponding position. The preliminary positioning is realized by inserting the backboard notch, and then the plastic middle frame support is assembled on the backboard, and further fixed by the pressing action of the film.

[0005] However, since the optical film is usually made of PET material with a thickness of 0.1-0.3mm, the material is soft and easy to deform. In the above structure, the film is easy to shift during assembly or subsequent transportation, which may cause film wrinkles, misalignment or light leakage and other abnormal phenomena, seriously affecting the display effect and product appearance quality of the liquid crystal module, and causing the increase of defective rate. In order to ensure product quality, the defective products need to be reworked, which reduces the production efficiency and increases the manufacturing cost.

[0006] In addition, in the transportation and handling process, the liquid crystal module may also be caused to shift due to external pressure or vibration, which may cause similar optical abnormal problems, affecting the stability and consistency of the terminal product. SUMMARY

[0007] The present application provides an optical film fixing structure and a liquid crystal module to solve the problem that the liquid crystal module in the prior art is easy to be pressed or vibrated by external force in the transportation and handling process, which may cause the shift of the optical film and affect the optical performance.

[0008] In a first aspect, the present application provides an optical film fixing structure, comprising: a back plate, a limiting protrusion and a frame; the back plate is provided with a containing cavity, an optical film is placed in the containing cavity, a positioning groove is arranged on the side wall of the containing cavity, a lug part is arranged on the edge of the optical film corresponding to the position of the positioning groove, and a limiting hole is arranged on the lug part corresponding to the position of the limiting protrusion; the limiting protrusion is arranged corresponding to the positioning groove and extends upward, and the limiting protrusion is arranged in the limiting hole to adapt to the positioning and installation of the optical film; the frame is arranged on the back plate to adapt to fixing the optical film in the containing cavity, and the limiting protrusion is arranged in the frame.

[0009] Beneficial effects: The present application provides an optical film fixing structure, which realizes multi-point positioning of the optical film in horizontal and vertical directions during installation, thereby effectively preventing displacement of the optical film due to external force during transportation or handling; the limiting protrusion extends upward and is arranged in the limiting hole of the optical film, and cooperates with the lug part arranged on the edge of the optical film and the positioning groove on the back plate to form a stable space limiting structure, thereby improving the installation stability of the optical film. In addition, the limiting protrusion also penetrates the frame, and the frame is arranged on the containing cavity to adapt to fixing the optical film in the containing cavity. The present application realizes precise positioning and reliable fixing of the optical film through the cooperation of the back plate, the limiting protrusion and the frame, solves the problem of easy displacement of the optical film of the liquid crystal module during transportation and handling in the prior art, and improves the optical performance stability and vibration resistance of the whole machine.

[0010] According to the first aspect of the present application, the outer edge of the back plate extends upward along the vertical direction to form a containing cavity, and the positioning groove is arranged from top to bottom.

[0011] According to the first aspect of the present application, the limiting protrusion, the limiting hole and the positioning groove are all arranged in multiple numbers, and the numbers are consistent.

[0012] According to the first aspect of the present application, the multiple positioning grooves are arranged on the same side of the back plate, and the multiple positioning grooves are arranged at intervals.

[0013] According to the first aspect of the present application, the frame is arranged on the back plate to adapt to fixing the optical film in the containing cavity, and the limiting protrusion is arranged in the frame.

[0014] According to the first aspect of the present application, the side wall of the containing cavity away from the containing cavity is provided with a clamping tongue, the frame is provided with a clamping groove adapted to cooperate with the clamping tongue corresponding to the position of the clamping tongue, the clamping groove and the clamping tongue are connected through buckling, so that the frame is arranged on the back plate to fix and install the optical film.

[0015] According to the first aspect of the present application, the clamping tongue and the clamping groove are all arranged in multiple numbers, and the multiple clamping tongues are arranged at intervals along the circumference of the side wall of the containing cavity.

[0016] According to the first aspect of the present application, at least one side wall of the accommodating cavity is provided with a blocking part extending horizontally towards the accommodating cavity, the blocking part is located above the optical film and is adapted to be pressed on the upper surface of the optical film, and the blocking part and the positioning groove are located at two adjacent sides.

[0017] According to the first aspect of the present application, the back plate is provided with a heat dissipation groove, and the heat dissipation groove is in communication with the accommodating cavity.

[0018] In the second aspect, the present application further provides a liquid crystal module comprising the optical film fixing structure. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The structure diagram of the back plate of the optical film fixing structure provided in some embodiments of the present application; Figure 2 The structure diagram of the back plate of the optical film fixing structure provided in some embodiments of the present application; Figure 1 The local enlarged schematic view of A in the middle; Figure 3 The partial sectional view of the optical film fixing structure provided in some embodiments of the present application; Figure 4 Another partial sectional view of the optical film fixing structure provided in some embodiments of the present application;

[0021] Explanation of reference signs: 1, back plate; 2, limiting protrusion; 3, frame; 4, optical film; 11, accommodating cavity; 12, positioning groove; 13, clamping tongue; 14, blocking part; 15, heat dissipation groove; 31, mounting hole; 32, clamping groove; 41, hanging ear part. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0023] Reference Figures 1 to 4As shown, in the first aspect of the present application, the present application provides an optical film 4 fixing structure, comprising: a back plate 1, a limiting protrusion 2 and a frame 3; the back plate 1 is provided with a containing cavity 11, the optical film 4 is placed in the containing cavity 11, the side wall of the containing cavity 11 is provided with a positioning groove 12, the edge of the optical film 4 is provided with a hanging lug 41 corresponding to the position of the positioning groove 12, and the hanging lug 41 is provided with a limiting hole corresponding to the position of the limiting protrusion 2; the limiting protrusion 2 is arranged corresponding to the positioning groove 12 and extends upward, and the limiting protrusion 2 is arranged in the limiting hole, so as to be suitable for positioning and installing the optical film 4; the frame 3 is arranged on the back plate 1, so as to be suitable for fixing the optical film 4 in the containing cavity 11, and the limiting protrusion 2 is arranged in the frame 3.

[0024] Referring to Figure 3 and Figure 4 As shown, the X-axis direction is the horizontal direction, and the Y-axis direction is the vertical direction.

[0025] Specifically, the present application provides an optical film 4 fixing structure, which realizes multi-point positioning of the optical film 4 in the horizontal direction and the vertical direction during installation, thereby effectively preventing the optical film 4 from being displaced due to external force during transportation or handling; the limiting protrusion 2 extends upward and is arranged in the limiting hole of the optical film 4, and cooperates with the hanging lug 41 arranged at the edge of the optical film 4 and the positioning groove 12 on the back plate 1 to form a stable space limiting structure, thereby improving the installation stability of the optical film 4. In addition, the limiting protrusion 2 also penetrates the frame 3, and the frame 3 is arranged on the containing cavity 11, so as to be suitable for fixing the optical film 4 in the containing cavity 11. The present application realizes precise positioning and reliable fixing of the optical film 4 through the cooperation of the back plate 1, the limiting protrusion 2 and the frame 3, solves the problem that the optical film 4 is easily displaced during transportation and handling of the liquid crystal module in the prior art, and improves the optical performance stability and anti-vibration ability of the whole machine.

[0026] It can be understood that the positioning groove 12 realizes positioning and installation of the optical film 4, the hanging lug 41 is arranged on the optical film 4, and the position of the hanging lug 41 corresponds to the position of the positioning groove 12, so that during installation, the hanging lug 41 of the optical film 4 corresponds to the positioning groove 12, thereby ensuring that the optical film 4 is installed in the containing groove in a fixed installation direction.

[0027] The limiting hole is arranged at the position of the hanging lug 41 corresponding to the limiting protrusion 2, and the limiting protrusion 2 cooperates with the limiting hole to realize the limitation of the optical film 4 in the horizontal direction, and the frame 3 is arranged above the containing cavity 11, so as to be suitable for limiting the vertical direction of the optical film 4, wherein the limiting protrusion 2 is arranged in the frame 3, so that the frame 3 is tightly matched with the back plate 1, thereby avoiding shaking or falling of the optical film 4 due to the small gap between the frame 3 and the back plate 1.

[0028] The optical film 4 fixing structure does not need to additionally increase adhesive, buckle or screw and other additional fixing members, simplifies the assembly process, is conducive to improving production efficiency and consistency, reducing assembly error rate; at the same time, it is also convenient for later maintenance and replacement, has high practical value and industrial application prospect.

[0029] In the first aspect embodiment of the present application, the outer edge of the back plate 1 extends upward in the vertical direction to form a containing cavity 11, and the positioning groove 12 is opened from top to bottom.

[0030] Specifically, the outer edge of the back plate 1 extends in the vertical direction to form a closed containing cavity 11, which plays a protective and limiting role in the lateral and vertical directions of the optical film 4, improves the anti-external force performance of the whole structure, and enhances the fixing effect of the optical film 4 in the containing cavity 11. The back plate 1 is integrally formed, reducing splicing, and the vertical extension structure of the side wall helps to realize precise cooperation with the frame 3, preventing offset or installation misplacement when the frame 3 is covered.

[0031] The positioning groove 12 is opened from top to bottom, so that the optical film 4 can be vertically inserted and positioned during installation, effectively simplifying the assembly operation, improving the assembly efficiency, and reducing the difficulty of worker operation and the assembly fault rate. This kind of guiding design can also avoid film scratching or deformation caused by lateral insertion, ensuring the integrity and performance stability of the optical film 4.

[0032] In the first aspect embodiment of the present application, the limiting protrusion 2, the limiting hole and the positioning groove 12 are all provided with multiple, and the number of each is consistent.

[0033] In the first aspect embodiment of the present application, the multiple positioning grooves 12 are all arranged on the same side of the back plate 1, and the multiple positioning grooves 12 are arranged at intervals.

[0034] Specifically, the limiting protrusion 2, the limiting hole and the positioning groove 12 are all provided with multiple, and the number of each is consistent, to realize multi-point positioning and uniform stress of the optical film 4, thereby significantly improving the fixing stability and anti-deviation ability of the optical film 4.

[0035] Specifically, the multiple limiting protrusions 2 are used in cooperation with the corresponding limiting holes, so that the optical film 4 can be limited and constrained in multiple directions during installation, effectively avoiding eccentricity, warping or edge loosening problems caused by single-point positioning. At the same time, by keeping the number of the positioning groove 12 consistent with the limiting structure, it can be ensured that the hanging ear part 41 of the optical film 4 is accurately positioned with each positioning component during installation, improving the assembly precision and overall assembly consistency. The symmetrical and equal arrangement also helps to balance the stress of the optical film 4, reduce local deformation caused by factors such as vibration or thermal expansion and contraction, and ensure the long-term stability of its optical performance.

[0036] A plurality of positioning grooves 12 are arranged on one side and spaced apart, which is beneficial to improve the guiding property and operation space when the hanging lug 41 is inserted, avoid interference between adjacent hanging lugs, and improve the overall assembly efficiency and operation convenience.

[0037] In the first aspect of the present application, the positions of the limiting protrusions 2 of the frame 3 are provided with mounting holes 31 from top to bottom, and the frame 3 is buckled with the back plate 1, so that the limiting protrusions 2 are arranged in the mounting holes 31.

[0038] Specifically, the frame 3 is provided with mounting holes 31 from top to bottom at the positions corresponding to the limiting protrusions 2, so that the limiting protrusions 2 can be directly arranged therein, forming an up-down penetrating positioning structure, further strengthening the positioning function of the limiting protrusions 2, avoiding the deviation or deformation of the limiting protrusions 2 due to the compression or lateral stress of the frame 3, and effectively improving the installation stability and vibration resistance of the optical film 4.

[0039] The frame 3 and the back plate 1 are connected in a buckling manner, which is simple in structure and high in assembly efficiency, and can avoid the problems such as complicated process and material waste caused by traditional screw or adhesive connection. At the same time, the buckling structure can realize quick assembly, and is convenient for disassembly and replacement in later period, improving the maintainability and use flexibility of the product.

[0040] It can be understood that the limiting protrusions 2 can be arranged in the mounting holes 31 of the frame 3 after penetrating the limiting holes of the optical film 4, forming a whole penetrating structure cooperatively matched among the back plate 1, the optical film 4 and the frame 3, ensuring the high-precision cooperation and stable connection among them, so as to further inhibit the up-down floating and lateral displacement of the optical film 4 in actual use, and improve the overall impact resistance and optical consistency of the liquid crystal module.

[0041] In the first aspect of the present application, the side wall of the accommodating cavity 11 away from the accommodating cavity 11 is provided with a clamping tongue 13, and the frame 3 is provided with a clamping groove 32 corresponding to the position of the clamping tongue 13, which is suitable for cooperating with the clamping tongue 13. The clamping groove 32 and the clamping tongue 13 are connected in a buckling manner, so that the frame 3 is arranged on the back plate 1 to fix and install the optical film 4.

[0042] In the first aspect of the present application, the clamping tongue 13 and the clamping groove 32 are both provided with a plurality of clamping tongues 13 which are circumferentially and spaced apart along the side wall of the accommodating cavity 11.

[0043] Specifically, the clamping tongue 13 is arranged on the side wall of the accommodating cavity 11 away from the optical film 4, and the clamping groove 32 is arranged on the frame 3 to cooperate with the clamping tongue 13. The two are connected by buckling to realize fixed installation, so that the frame 3 and the back plate 1 can be reliably assembled without using traditional connection means such as screws and adhesives, simplifying the assembly process and improving the structural stability.

[0044] The clamping tongue 13 is arranged on the outer side of the side wall of the accommodating cavity 11 away from the optical film 4, effectively avoiding interference with the body of the optical film 4, and being connected with the clamping groove 32 on the frame 3 through elastic buckling, which is simple in structure and easy to process. In addition, it can also realize quick assembly and disassembly operation, improve production efficiency and reduce maintenance cost.

[0045] The clamping buckle connection also has certain buffering performance. When subjected to external force impact or vibration, it can absorb part of the stress through slight deformation, avoid structure loosening or damage, and further improve the fixing reliability and shock resistance of the optical film 4 in the module.

[0046] It can be understood that the clamping tongue 13 and the clamping groove 32 are both provided with a plurality of clamping tongues 13, and the plurality of clamping tongues 13 are arranged in a circumferential interval along the side wall of the accommodating cavity 11, so that the overall locking strength and anti-deformation ability are improved. The interval arrangement of the plurality of clamping tongues 13 helps to disperse stress concentration, avoid deformation or connection failure caused by excessive local stress, and also improves the overall anti-pulling and anti-rotation ability of the structure, so that a stable and firm connection interface is formed between the frame 3 and the back plate 1.

[0047] In the first aspect of the present application, at least one side wall of the accommodating cavity 11 is provided with a blocking part 14 extending towards the horizontal direction of the accommodating cavity 11, the blocking part 14 is located above the optical film 4 and is suitable for being pressed on the upper surface of the optical film 4, and the blocking part 14 and the positioning groove 12 are located on the adjacent two sides.

[0048] Specifically, by arranging the blocking part 14 extending towards the horizontal direction of the accommodating cavity 11 on at least one side wall of the accommodating cavity 11, and arranging the blocking part 14 and the positioning groove 12 on the adjacent two sides, the limiting and protecting ability of the optical film 4 is further enhanced, and the overall anti-deviation performance is improved.

[0049] The blocking part 14 as an auxiliary limiting structure extends towards the horizontal direction of the accommodating cavity 11 to press one side of the optical film 4 in the accommodating cavity 11, thereby effectively preventing the optical film 4 from being displaced due to lateral shaking, transportation vibration or assembly deviation. The arrangement of the blocking part 14 and the positioning groove 12 on the adjacent two sides forms clamping of the optical film 4, enhances the fixing effect of the optical film 4 through mechanical fitting, and makes the optical film 4 more stable in the accommodating cavity 11 and not easy to shake or fall off.

[0050] It can be understood that the blocking part 14 has reasonable structure design and is simple to process, without the need to increase additional parts or complex assembly process, so as to significantly improve the stability and reliability of the overall structure, reduce the risk of optical performance decline of the module due to deviation of the optical film 4, and be suitable for liquid crystal module devices with high requirements for shock resistance and structural precision.

[0051] In the first aspect of the present application, the back plate 1 is provided with a heat dissipation groove 15, which is in communication with the accommodating cavity 11.

[0052] Specifically, the heat dissipation groove 15 is in communication with the accommodating cavity 11, thereby effectively improving the heat dissipation efficiency of the optical film 4 and its peripheral elements during use without adding additional heat dissipation devices, and enhancing the thermal stability and reliability of the overall structure.

[0053] The heat dissipation groove 15 is arranged on the back plate 1 and is in communication with the accommodating cavity 11 to form a heat dissipation gap on the lower surface of the optical module, which is conducive to heat diffusion. By arranging the heat dissipation groove 15, the local heat accumulation phenomenon can be effectively alleviated, and the problems of thermal expansion, warping or performance degradation of the optical film 4 caused by excessive temperature rise can be prevented.

[0054] In the second aspect, the present application further provides a liquid crystal module, which comprises an optical film 4 fixing structure.

[0055] Specifically, by integrating the optical film 4 fixing structure on the liquid crystal module, the positioning accuracy, installation stability and anti-vibration ability of the optical film 4 and the whole machine are significantly improved while realizing the basic display function of the liquid crystal module, thereby solving the problem of display performance degradation caused by displacement of the optical film 4 during transportation, assembly and use of the liquid crystal module in the prior art.

[0056] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. An optical diaphragm fixing structure, characterized in that, include: Back plate (1), back plate (1) is provided with accommodating cavity (11), optical film (4) is placed in accommodating cavity (11), accommodating cavity (11) is provided with positioning groove (12) on side wall, optical film (4) is provided with ear (41) at position corresponding to positioning groove (12) on edge, and ear (41) is provided with limiting hole at position corresponding to limiting protrusion (2); The limiting protrusion (2) is provided corresponding to the positioning groove (12) and extends upward. The limiting protrusion (2) passes through the limiting hole to be suitable for positioning and installing the optical film (4). The frame (3) is placed on the back plate (1) to fix the optical film (4) in the accommodating cavity (11), and the limiting protrusion (2) is inserted through the frame (3).

2. The optical film fixing structure according to claim 1, characterized in that, The outer edge of the back plate (1) extends vertically upward to enclose and form a receiving cavity (11), and the positioning groove (12) is opened from top to bottom.

3. The optical film fixing structure according to claim 1, characterized in that, Multiple limiting protrusions (2), limiting holes and positioning grooves (12) are provided, and the number of each is the same.

4. The optical film fixing structure according to claim 3, characterized in that, Multiple positioning grooves (12) are provided on the same side of the back plate (1), and the multiple positioning grooves (12) are spaced apart.

5. The optical film fixing structure according to claim 1, characterized in that, The frame (3) has a mounting hole (31) at the position of the corresponding limiting protrusion (2) from top to bottom. The frame (3) is fastened to the back plate (1) so that the limiting protrusion (2) passes through the mounting hole (31).

6. The optical film fixing structure according to claim 1, characterized in that, A latch (13) is provided on the side wall of the accommodating cavity (11) away from the accommodating cavity (11). The frame (3) is provided with a slot (32) corresponding to the latch (13) and is suitable for cooperating with the latch (13). The slot (32) and the latch (13) are fastened together so that the frame (3) is covered on the back plate (1) to fix and install the optical film (4).

7. The optical film fixing structure according to claim 6, characterized in that, Multiple latches (13) and multiple slots (32) are provided, and multiple latches (13) are arranged circumferentially along the side wall of the receiving cavity (11).

8. The optical film fixing structure according to claim 1, characterized in that, At least one side wall of the accommodating cavity (11) is provided with a blocking part (14) extending horizontally toward the accommodating cavity (11). The blocking part (14) is located above the optical film (4) to be suitable for pressing onto the upper surface of the optical film (4). The blocking part (14) and the positioning groove (12) are located on adjacent sides.

9. The optical film fixing structure according to claim 1, characterized in that, The back plate (1) is provided with a heat dissipation groove (15), which is connected to the accommodating cavity (11).

10. A liquid crystal module, characterized in that, The optical film (4) fixing structure includes any one of claims 1-9.

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