Liquid crystal module (LCM) backlight structure
By setting the convex and convex columns on the light guide plate, the gap between the light guide board and the reflex film solves the problem of relative motion in the vibration test in the existing technologies. Backlight structure.
Patent Information
- Application Number
- CN202421249340.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-06-03
AI Technical Summary
In the backlight structure of the existing vehicle-mounted LCM LCD display module, the light guide plate and the reflector are stacked with zero gap, resulting in relative movements that may occur during the vibration test, causing friction damage and affecting the display spot.
Set a convex deck on one side of the light guide plate, causing a gap between the light guide board and the reflector, and insert the avoidance slot on the reflex sheet on the right side of the right side of the convex, so that the light guide board and the reflector form a whole to avoid touch.
By setting the gap, the light guide board and reflex sheet are avoided in the vibration test to prevent damage and improve the stability and life of the backlight structure.
Smart Images
Figure CN222420757U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal display, in particular to an LCM backlight structure. Background Art
[0002] LCM liquid crystal display has replaced the traditional CRT cathode ray tube display with its many advantages such as clear and delicate images, no flicker, no eye damage, no radiation, low power consumption, and thinner, and is favored by consumers. At present, it is widely used in electronic watches, mobile phones, PDAs, handheld game consoles, learning machines, GPS navigators, digital cameras, digital video cameras, computer monitors and TVs. It is also used in high reliability fields such as automobiles, medical treatment, and military. Among them, better structural design and assembly technology can be more energy-efficient in daily applications, better protect LCDs from the influence and damage of the external environment, play a very positive role in extending the life of the product, and accumulate more credibility and reputation for the product.
[0003] In the conventional structure of the existing automotive LCM liquid crystal display module backlight, the light guide plate and the reflective sheet are stacked with zero gap, the reflective sheet and the backlight iron frame are fixed by double-sided adhesive, and the contact surface between the light guide plate and the reflective sheet has a dot pit design. Although a silicone block is usually added to the side of the backlight iron frame to limit and fix the light guide plate, the silicone block has a certain elastic effect. During the vibration durability test of the client, the light guide plate and the reflective sheet will move slightly back and forth, up, down, left and right. Long friction time will cause damage to the reflective sheet or the light guide plate, resulting in display spot problems. Utility Model Content
[0004] Based on this, it is necessary to provide an LCM backlight structure to address the above technical problems. A boss is set on one side of the light guide plate to create a gap between the light guide plate and the reflective sheet. At the same time, the boss on the right side of the boss is inserted into the avoidance groove on the reflective sheet after installation, so that the light guide plate and the reflective sheet form a whole. Since the light guide plate and the reflective sheet do not contact, when the client performs a vibration test, there will be no relative movement between the backlight guide plate and the reflective sheet, and no damage will be caused.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A LCM backlight structure, comprising:
[0007] A glue frame and an iron frame, wherein the iron frame is installed inside the glue frame, an LED is installed on the inner top wall of the iron frame, and a light guide plate corresponding to the LED is arranged on the right side of the glue frame;
[0008] A reflective sheet and double-sided adhesive, wherein the reflective sheet is fixedly connected to the iron frame by the double-sided adhesive, and bosses are fixedly connected to the four corners of the light guide plate, and the bosses are used to create a gap between the light guide plate and the reflective sheet.
[0009] Furthermore, the gap between the light guide plate and the reflective sheet is 0.2-0.4 mm.
[0010] Furthermore, a convex column is fixedly connected to the right side of the boss, and an avoidance groove corresponding to the convex column is formed on the reflective sheet.
[0011] Furthermore, silicone gaskets are installed between the light guide plate and the inner walls on both the front and rear sides of the iron frame.
[0012] Furthermore, the rubber frame and the iron frame are both U-shaped and fixedly connected via a limiting assembly, wherein the limiting assembly comprises a movable rod movably connected to the four corners of the rubber frame, and a movable block is fixedly connected to one end of the movable rod located outside the rubber frame.
[0013] Furthermore, the other end of the movable rod is fixedly connected to a limit hook, a long groove corresponding to the movable rod is formed on the iron frame, and a clamping groove corresponding to the limit hook is formed on the inner wall of the long groove.
[0014] Furthermore, through holes are provided at four corners of the glue rack, and the movable rod is slidably connected inside the through holes.
[0015] Furthermore, a circular hole is formed on the inner wall of the through hole, a sleeve corresponding to the circular hole is fixedly connected to one side of the movable rod, and a spring is installed between the sleeve and the inner wall of the circular hole.
[0016] The LCM backlight structure provided by the utility model generates a gap between the light guide plate and the reflective sheet by arranging a boss on one side of the light guide plate, and inserts a boss on the right side of the boss into an avoidance groove on the reflective sheet after installation, so that the light guide plate and the reflective sheet form a whole. Since the light guide plate and the reflective sheet are not in contact, when the client performs a vibration test, there will be no relative movement between the backlight light guide plate and the reflective sheet, and no damage will be caused.
[0017] The LCM backlight structure provided by the utility model fixes the rubber frame and the iron frame together through the limit assembly. When performing a vibration test, the restoring force of the spring always causes the limit hook to be engaged with the card slot to avoid separation between the rubber frame and the iron frame. When disassembling, the two movable blocks are brought closer to each other. At this time, the movable block drives the movable rod and the sleeve to move and compress the spring until the limit hook on one side of the movable rod is disengaged from the card slot, thereby facilitating the disassembly between the rubber frame and the iron frame, and the use is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of a three-dimensional exploded structure of the LCM backlight structure provided by the utility model;
[0019] Figure 2 The LCM backlight structure provided by the utility model Figure 1 The enlarged schematic diagram of point A in the middle;
[0020] Figure 3 A front cross-sectional schematic diagram of the LCM backlight structure provided by the utility model;
[0021] Figure 4 The LCM backlight structure provided by the utility model Figure 3 The enlarged schematic diagram of point B in the middle;
[0022] Figure 5 A right side cross-sectional structural diagram of the LCM backlight structure provided by the utility model;
[0023] Figure 6 The LCM backlight structure provided by the utility model Figure 5 Enlarged schematic diagram of point C in the middle.
[0024] The markings in the figure are as follows:
[0025] 1. Glue frame; 2. Iron frame; 3. LED; 4. Light guide plate; 5. Reflector; 6. Double-sided adhesive; 7. Boss; 8. Boss; 9. Avoidance groove; 10. Silicone gasket; 11. Limiting assembly; 1101. Movable rod; 1102. Movable block; 1103. Limiting hook; 1104. Long slot; 1105. Card slot; 1106. Through hole; 1107. Round hole; 1108. Sleeve; 1109. Spring. DETAILED DESCRIPTION
[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0027] As described in the background technology, the LCM backlight structure creates a gap between the light guide plate 4 and the reflective sheet 5 by setting a boss 7 on one side of the light guide plate 4. Since the light guide plate 4 and the reflective sheet 5 are not in contact, when the client performs a vibration test, there will be no relative movement between the backlight light guide plate 4 and the reflective sheet 5.
[0028] In order to solve this technical problem, the utility model provides an LCM backlight structure, which is applied to the connection between the backlight guide plate 4 and the reflective sheet 5 when performing a vibration test.
[0029] Specifically, please refer to Figure 1-6 , the LCM backlight structure specifically includes:
[0030] A plastic frame 1 and an iron frame 2, wherein the iron frame 2 is installed inside the plastic frame 1, an LED 3 is installed on the inner top wall of the iron frame 2, and a light guide plate 4 corresponding to the LED 3 is arranged on the right side of the plastic frame 1;
[0031] The reflective sheet 5 and the double-sided adhesive 6 are fixedly connected to the iron frame 2 by the double-sided adhesive 6 . The four corners of the light guide plate 4 are fixedly connected with bosses 7 . The bosses 7 are used to create a gap between the light guide plate 4 and the reflective sheet 5 .
[0032] The LCM backlight structure provided by the utility model provides a boss 7 on one side of the light guide plate 4 so that a gap is generated between the light guide plate 4 and the reflective sheet 5. At the same time, a boss 8 on the right side of the boss 7 is inserted into an avoidance groove 9 on the reflective sheet 5 after installation, so that the light guide plate 4 and the reflective sheet 5 form a whole. Since the light guide plate 4 and the reflective sheet 5 are not in contact, when the client performs a vibration test, there will be no relative movement between the backlight light guide plate 4 and the reflective sheet 5, and no damage will be caused.
[0033] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.
[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.
[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0036] Please refer to Figure 1-6 , an LCM backlight structure, comprising a plastic frame 1 and an iron frame 2, the iron frame 2 is installed inside the plastic frame 1, an LED 3 is installed on the inner top wall of the iron frame 2, and a light guide plate 4 corresponding to the LED 3 is arranged on the right side of the plastic frame 1;
[0037] The reflective sheet 5 and the double-sided adhesive 6 are fixedly connected to the iron frame 2 by the double-sided adhesive 6 . The four corners of the light guide plate 4 are fixedly connected with bosses 7 . The bosses 7 are used to create a gap between the light guide plate 4 and the reflective sheet 5 .
[0038] Please refer to Figure 3 and 4 , the gap between the light guide plate 4 and the reflector 5 is 0.2-0.4mm;
[0039] The gap between the light guide plate 4 and the reflective sheet 5 is preferably 0.3 mm. This arrangement can not only avoid contact between the backlight light guide plate 4 and the reflective sheet 5, but also reduce the overall thickness without causing an increase in thickness.
[0040] Please refer to Figure 1 and Figure 2 A convex column 8 is fixedly connected to the right side of the boss 7, and an avoidance groove 9 corresponding to the convex column 8 is opened on the reflective sheet 5.
[0041] In the LCM backlight structure provided in this embodiment, the boss 8 on the right side of the boss 7 is inserted into the avoidance groove 9 on the reflective sheet 5 after installation, so that the light guide plate 4 and the reflective sheet 5 form a whole. Since the light guide plate 4 and the reflective sheet 5 are not in contact, when the client performs a vibration test, there will be no relative movement between the backlight guide plate 4 and the reflective sheet 5.
[0042] The LCM backlight structure provided in Example 1 is further optimized. Specifically, Figure 1 As shown, silicone gaskets 10 are installed between the light guide plate 4 and the inner walls of the front and rear sides of the iron frame 2.
[0043] Through the above structural design, the movement of the light guide plate 4 can be limited to prevent the light guide plate 4 from contacting the inner wall of the iron frame 2. At the same time, the silicone gasket 10 has a certain elasticity and can effectively buffer vibration.
[0044] The LCM backlight structure provided in Example 1 or 2 is further optimized, such as Figure 1 and Figure 5 As shown, the rubber frame 1 and the iron frame 2 are both U-shaped and fixedly connected by a limiting assembly 11. The limiting assembly 11 includes movable rods 1101 movably connected to the four corners of the rubber frame 1, and one end of the movable rod 1101 located outside the rubber frame 1 is fixedly connected to a movable block 1102, and the other end of the movable rod 1101 is fixedly connected to a limiting hook 1103. The iron frame 2 is provided with a long groove 1104 corresponding to the movable rod 1101, and the inner wall of the long groove 1104 is provided with a slot 1105 corresponding to the limiting hook 1103;
[0045] In this way, the rubber frame 1 and the iron frame 2 are fixed together by the limit assembly 11. When doing a vibration test, the restoring force of the spring 1109 always makes the limit hook 1103 engage with the slot 1105 to avoid separation between the rubber frame 1 and the iron frame 2. When disassembling, the two movable blocks 1102 are brought close to each other. At this time, the movable block 1102 drives the movable rod 1101 and the sleeve 1108 to move and compress the spring 1109 until the limit hook 1103 on one side of the movable rod 1101 is disengaged from the slot 1105, thereby facilitating the disassembly between the rubber frame 1 and the iron frame 2.
[0046] The LCM backlight structure provided in the above embodiments is further optimized, such as Figure 5 and Figure 6 As shown, through holes 1106 are provided at the four corners of the glue rack 1, and a movable rod 1101 is slidably connected inside the through hole 1106. A circular hole 1107 is provided on the inner wall of the through hole 1106. A sleeve 1108 corresponding to the circular hole 1107 is fixedly connected to one side of the movable rod 1101, and a spring 1109 is installed between the sleeve 1108 and the inner wall of the circular hole 1107.
[0047] With such a structural design, the movable rod 1101 slides in the circular hole 1107 through the sleeve 1108 without tilting, making the engagement between the limit hook 1103 and the slot 1105 more stable. At the same time, the restoring force of the spring 1109 always keeps the limit hook 1103 and the slot 1105 engaged, avoiding separation between the rubber frame 1 and the iron frame 2.
[0048] The use process of the LCM backlight structure provided by the utility model is as follows:
[0049] By setting a boss 7 on one side of the light guide plate 4, a gap is generated between the light guide plate 4 and the reflective sheet 5. At the same time, the boss 8 on the right side of the boss 7 is inserted into the avoidance groove 9 on the reflective sheet 5 after installation, so that the light guide plate 4 and the reflective sheet 5 form a whole. Since the light guide plate 4 and the reflective sheet 5 are not in contact, when the client performs a vibration test, there will be no relative movement between the backlight light guide plate 4 and the reflective sheet 5, and no damage will be caused. When in use, the rubber frame 1 and the iron frame 2 are fixed together by the limit assembly 11. When doing a vibration test, the restoring force of the spring 1109 always makes the limit hook 1103 engage with the slot 1105 to avoid separation between the rubber frame 1 and the iron frame 2. When disassembling, the two movable blocks 1102 are brought close to each other. At this time, the movable block 1102 drives the movable rod 1101 and the sleeve 1108 to move and compress the spring 1109 until the limit hook 1103 on one side of the movable rod 1101 is disengaged from the slot 1105, thereby facilitating the disassembly between the rubber frame 1 and the iron frame 2, and is very convenient to use.
[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0051] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.
Claims
1. An LCM backlight structure, characterized in that: It includes: A plastic frame (1) and an iron frame (2), wherein the iron frame (2) is mounted inside the plastic frame (1), an LED (3) is mounted on the inner top wall of the iron frame (2), and a light guide plate (4) corresponding to the LED (3) is arranged on the right side of the plastic frame (1); A reflective sheet (5) and a double-sided adhesive (6), wherein the reflective sheet (5) is fixedly connected to the iron frame (2) via the double-sided adhesive (6), and bosses (7) are fixedly connected to the four corners of the light guide plate (4), wherein the bosses (7) are used to generate a gap between the light guide plate (4) and the reflective sheet (5).
2. The LCM backlight structure according to claim 1, characterized in that: The gap between the light guide plate (4) and the reflective sheet (5) is 0.2-0.4 mm.
3. The LCM backlight structure according to claim 2, characterized in that: A convex column (8) is fixedly connected to the right side of the convex platform (7), and an avoidance groove (9) corresponding to the convex column (8) is provided on the reflective sheet (5).
4. The LCM backlight structure according to claim 3, characterized in that: Silicone gaskets (10) are installed between the light guide plate (4) and the inner walls on both the front and rear sides of the iron frame (2).
5. The LCM backlight structure according to claim 4, characterized in that: The rubber frame (1) and the iron frame (2) are both U-shaped structures and are fixedly connected via a limiting assembly (11). The limiting assembly (11) comprises movable rods (1101) movably connected to the four corners of the rubber frame (1). One end of the movable rod (1101) located outside the rubber frame (1) is fixedly connected to a movable block (1102).
6. The LCM backlight structure according to claim 5, characterized in that: The other end of the movable rod (1101) is fixedly connected to a limit hook (1103); a long groove (1104) corresponding to the movable rod (1101) is provided on the iron frame (2); and a clamping groove (1105) corresponding to the limit hook (1103) is provided on the inner wall of the long groove (1104).
7. The LCM backlight structure according to claim 6, characterized in that: Through holes (1106) are provided at the four corners of the glue rack (1), and the movable rod (1101) is slidably connected inside the through holes (1106).
8. The LCM backlight structure according to claim 7, characterized in that: A circular hole (1107) is formed on the inner wall of the through hole (1106); a sleeve (1108) corresponding to the circular hole (1107) is fixedly connected to one side of the movable rod (1101); and a spring (1109) is installed between the sleeve (1108) and the inner wall of the circular hole (1107).