Backlight module for liquid crystal display and liquid crystal display

Abstract

This application relates to the field of liquid crystal display technology, specifically a backlight module for a liquid crystal display. A reflective film is mounted on one side of a mounting base, and an LED light source is disposed on one side of the reflective film. The mounting base has a mounting groove adapted to the LED light source. The LED light source passes through the reflective film and is inserted into the mounting groove. Positioning components for locking and fixing the LED light source are mounted on both sides of the mounting groove's inner cavity. The positioning components include a locking plate slidably mounted within an adjustment groove on the side wall of the mounting groove. The locking plate includes a main plate and a positioning plate fitted onto the output end of the main plate. A buffer spring is provided between the positioning plate and the main plate. The positioning plate is adapted to the locking groove on the side wall of the LED light source. A power mechanism is also connected to the main plate for driving it to clamp the LED light source within the adjustment groove. An unlocking mechanism is connected to the positioning plate for driving it to disengage from the locking groove on the side wall of the LED light source. This application improves the stability of the connection between the LED light source and the backlight module, effectively avoiding the problem of LED light source detachment due to prolonged use.

Description

Technical Field

[0001] This application relates to the field of liquid crystal display technology, and in particular to a backlight module for a liquid crystal display and a liquid crystal display. Background Technology

[0002] Backlights mainly consist of a light source, a light guide plate, optical films, and a plastic frame. Backlights are characterized by high brightness, long lifespan, and uniform light emission. Currently, there are three main types of backlights: EL, CCFL, and LED. Depending on the location of the light source, they are divided into edge-lit and direct-lit types. As LCD modules continue to develop towards brighter, lighter, and thinner designs, edge-lit CCFL backlights have become the mainstream in backlight development.

[0003] Traditional LED light source modules are glued to the backlight module. However, this method can easily cause the LED light source to detach after prolonged use, affecting the equipment's operation. Furthermore, the glued installation method makes disassembly and maintenance difficult. Therefore, we need to propose a backlight module and an LCD display for LCD screens. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, this application provides a backlight module for a liquid crystal display and a liquid crystal display.

[0005] The technical solution provided in this application for a backlight module for a liquid crystal display screen and the liquid crystal display screen itself is as follows: A backlight module for a liquid crystal display includes a mounting base, a reflective film mounted on one side of the mounting base, an LED light source disposed on one side of the reflective film, and a mounting groove adapted to the LED light source on the mounting base. The LED light source passes through the reflective film and is inserted into the mounting groove. Positioning components for snapping and fixing the LED light source are installed on both sides of the inner cavity of the mounting groove. The positioning components include a locking plate slidably mounted in an adjustment groove on the side wall of the mounting groove. The locking plate includes a main plate and a positioning plate fitted on the output end of the main plate. A buffer spring is provided between the positioning plate and the main plate, and the positioning plate is adapted to the locking groove on the side wall of the LED light source. A power mechanism for driving the LED light source to clamp in the adjustment groove is also connected to the main plate, and an unlocking mechanism for driving the LED light source to disengage from the locking groove on the side wall of the LED light source is connected to the positioning plate.

[0006] Furthermore, the power mechanism is provided in two sets, located on the upper and lower sides of the LED light source respectively. It includes an adjusting rod connected to the end of the main body plate and a power rod connected to the other end of the adjusting rod. The adjusting rod moves horizontally within a guide groove on the mounting base. The two ends of the power rod are hinged to the adjusting rod and a drive rod penetrating the mounting base, respectively. The drive rod is distributed along the installation direction of the LED light source. The LED light source includes a light source panel and a light source base, wherein the outer diameter of the light source panel is larger than that of the light source base, and the outer end of the drive rod abuts against the inner side of the light source panel.

[0007] Furthermore, the main body plate includes a rectangular block slidably connected within the adjustment groove and a connecting block on the side of the rectangular block near the LED light source. The outer diameter of the connecting block is smaller than that of the rectangular block, and the connecting block is adapted to the connecting groove on the positioning plate. A buffer spring is provided between the end of the connecting block and the bottom of the connecting groove. The slot on the side of the LED light source includes a first groove and a second groove located at the bottom of the first groove, wherein the second groove is located on the side of the first groove near the LED panel.

[0008] Furthermore, the unlocking mechanism includes an adjustment disc fixedly mounted on the back of the mounting base. The adjustment disc is rotatably mounted on a bracket on the back of the mounting base, and the central axis of the adjustment disc passes through the bracket. An adjustment handle is fixed to the outer end of the central axis. Unlocking rods are hinged around the adjustment disc, with the other end of the unlocking rods hinged to the mounting block on the outside of the connecting block. When the adjustment disc rotates, the unlocking rods can move the connecting blocks on both sides away from each other.

[0009] A liquid crystal display screen includes the aforementioned backlight module for a liquid crystal display screen. A housing is mounted on a mounting base. A liquid crystal panel is fixedly mounted inside the housing and on one side of a reflective film. A back plate is mounted on the other side of the housing. The back plate is fixedly connected to the housing by screws.

[0010] In summary, this application includes at least one of the following beneficial technical effects: 1. In this application, the LED light source passes through the reflective film and is inserted into the mounting groove of the mounting base. Positioning components are set on both sides of the inner cavity of the mounting groove to snap and fix the LED light source. Compared with the traditional glue bonding method, this installation method can significantly improve the stability of the connection between the LED light source and the backlight module, effectively avoid the problem of LED light source falling off due to long-term use, and ensure the normal use of the equipment. 2. When the LED light source module of the backlight module in this application needs to be disassembled and repaired, the positioning plate can be driven to disengage from the slot of the LED light source side wall through the unlocking mechanism. The operation is convenient and quick, greatly reducing the difficulty of disassembly, improving the repair efficiency, and providing great convenience for the maintenance and upkeep of the LCD screen. 3. The LCD screen composed of the backlight module, housing, LCD panel, backplate, and other components in this application has a reasonable structure and can provide stable and reliable backlight support for the LCD display, which helps to improve the overall performance and service life of the LCD screen. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a backlight module for an LCD display and the overall structure of the LCD display. Figure 2 This is an exploded view of a backlight module for an LCD display and an LCD display itself. Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a backlight module for an LCD display and an exploded view of the LCD display; Figure 5 yes Figure 4 Enlarged view of section B in the middle.

[0012] Explanation of reference numerals in the attached drawings: 1. Mounting base; 11. Mounting slot; 111. Adjustment slot; 12. Guide slot; 13. Bracket; 2. Reflective film; 3. LED light source; 31. Slot; 311. First slot; 312. Second slot; 32. Light source panel; 33. Light source base; 4. Positioning component; 41. Slot plate; 411. Main body plate; 4111. Rectangular block; 4112. Connecting block; 412. Positioning plate; 4121. Connecting slot; 4122. Mounting block; 5. Power mechanism; 51. Adjustment rod; 52. Power rod; 53. Drive rod; 6. Unlocking mechanism; 61. Adjustment disc; 611. Unlocking rod; 62. Adjustment handle; 7. Housing; 8. LCD panel; 9. Back plate; 91. Screw. Detailed Implementation

[0013] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0014] Example 1 This application discloses a backlight module for a liquid crystal display (LCD) and an LCD display.

[0015] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A backlight module for a liquid crystal display screen includes a mounting base 1, a reflective film 2 mounted on one side of the mounting base 1, and an LED light source 3 disposed on one side of the reflective film 2. The mounting base 1 has a mounting groove 11 adapted to the LED light source 3, wherein the LED light source 3 passes through the reflective film 2 and is inserted into the mounting groove 11. Positioning components 4 for engaging and fixing the LED light source 3 are mounted on both sides of the inner cavity of the mounting groove 11. The positioning components 4 include adjustable components slidably mounted on the side wall of the mounting groove 11. The retaining plate 41 inside the groove 111 includes a main plate 411 and a positioning plate 412 fitted on the output end of the main plate 411. A buffer spring is provided between the positioning plate 412 and the main plate 411, and the positioning plate 412 is adapted to the slot 31 on the side wall of the LED light source 3. The main plate 411 is also connected to a power mechanism 5 for driving it to clamp the LED light source 3 in the adjusting groove 111. The positioning plate 412 is connected to an unlocking mechanism 6 for driving it to disengage from the slot 31 on the side wall of the LED light source 3. When assembling the backlight module, the reflective film 2 is first installed on one side of the mounting base 1. Then, the LED light source 3 is aligned with the mounting slot 11 on the mounting base 1, so that the LED light source 3 passes through the reflective film 2 and is inserted into the mounting slot 11. As the LED light source 3 is inserted, the power mechanism 5 connected to the main body plate 411 is activated. The power mechanism 5 drives the locking plate 41, which is slidably installed in the adjustment groove 111 on the side wall of the mounting groove 11, to move towards the LED light source 3. When the positioning plate 412, which is fitted onto the output end of the main body plate 411, aligns with the slot 31 on the side wall of the LED light source 3, the positioning plate 412 is engaged in the slot 31 under the elastic force of the buffer spring between it and the main body plate 411, thereby completing the engagement and fixation of the LED light source 3 and achieving a stable installation of the LED light source 3 on the backlight module. When it is necessary to disassemble and repair the LED light source 3, the unlocking mechanism 6 connected to the positioning plate 412 is activated. The unlocking mechanism 6 drives the positioning plate 412 to overcome the elastic force of the buffer spring and disengage from the slot 31 on the side wall of the LED light source 3, releasing the fixation restriction on the LED light source 3. Then, the LED light source 3 can be pulled out from the mounting groove 11, completing the disassembly operation.

[0016] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The power mechanism 5 has two sets, located on the upper and lower sides of the LED light source 3 respectively. It includes an adjusting rod 51 connected to one end of the main body plate 411 and a power rod 52 connected to the other end of the adjusting rod 51. The adjusting rod 51 moves horizontally within the guide groove 12 on the mounting base 1. The two ends of the power rod 52 are hinged to the adjusting rod 51 and a drive rod 53 penetrating the mounting base 1, respectively. The drive rod 53 is distributed along the mounting direction of the LED light source 3. The LED light source 3 includes a light source panel 32 and a light source base 33, wherein the outer diameter of the light source panel 32 is larger than that of the light source base 33, and the outer end of the drive rod 53 abuts against the inner side of the light source panel 32. When the LED light source 3 is inserted into the mounting slot 11 of the mounting base 1, the light source base 33 enters the mounting slot 11. As the light source base 33 gradually goes deeper, the inner side of its light source panel 32 will abut against the outer end of the drive rod 53 distributed along the installation direction of the LED light source 3 and penetrating the mounting base 1, and continuously push the drive rod 53 to move along the installation direction. When the drive rod 53 moves, the power rods 52 hinged at both ends will move in tandem. The power rods 52 on both sides, which are in a horizontal state, will tilt toward the middle under the action of the middle drive rod 53, and transmit force to the adjustment rods 51 on the upper and lower sides of the LED light source 3 respectively. Driven by the power rods 52, the adjustment rods 51 connected to the end of the main body plate 411 move horizontally toward the drive rod 53 along the guide groove 12 on the mounting base 1, thereby driving the main body plates 411 on the upper and lower sides to move closer to the LED light source 3 synchronously, providing power support for the subsequent positioning plate 412 to engage with the side wall slot 31 of the LED light source 3.

[0017] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The main body plate 411 includes a rectangular block 4111 slidably connected in the adjustment groove 111 and a connecting block 4112 on the side of the rectangular block 4111 near the LED light source 3. The outer diameter of the connecting block 4112 is smaller than that of the rectangular block 4111, and the connecting block 4112 is adapted to the connecting groove 4121 on the positioning plate 412. A buffer spring is provided between the end of the connecting block 4112 and the bottom of the connecting groove 4121. The slot 31 on the side of the LED light source 3 includes a first groove 311 and a second groove 312 located at the bottom of the first groove 311, wherein the second groove 312 is located on the side of the first groove 311 near the LED panel. When the power mechanism 5 drives the main plate 411 to move closer to the LED light source 3, the rectangular block 4111, which is slidably connected in the adjustment groove 111 in the main plate 411, will drive the connecting block 4112 on the side closer to the LED light source 3 to move synchronously. Since the outer diameter of the connecting block 4112 is smaller than that of the rectangular block 4111 and is adapted to the connecting groove 4121 on the positioning plate 412, the connecting block 4112 will maintain stable movement in the connecting groove 4121. As the main plate 411 continues to move closer, the positioning plate 412 first contacts the side of the LED light source 3 and initially aligns with the first groove 311. At this time... Before the LED light source 3 is fully inserted into the mounting slot 11, during this process, the buffer spring between the end of the connecting block 4112 and the bottom of the connecting slot 4121 is compressed to generate elastic force. Under the push of this elastic force, the positioning plate 412 moves in the first slot 311 and, along with the light source base 33, precisely matches the second slot 312 on the side closer to the LED panel. Finally, the positioning plate 412 is stably inserted into the second slot 312. With the elastic support of the buffer spring, the LED light source 3 is tightly and with buffered margin is fixed, avoiding damage to the LED light source 3 caused by hard contact.

[0018] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The unlocking mechanism 6 includes an adjustment disc 61 fixedly mounted on the back of the mounting base 1. The adjustment disc 61 is rotatably mounted on a bracket 13 on the back of the mounting base 1, and the central pivot of the adjustment disc 61 passes through the bracket 13. An adjustment handle 62 is fixed to the outer end of the central pivot. Unlocking rods 611 are hinged around the adjustment disc 61. The other end of the unlocking rods 611 is hinged to the mounting block 4122 on the outer side of the connecting block 4112. When the adjustment disc 61 rotates, it can drive the connecting blocks 4112 on both sides away through the unlocking rods 611. When the LED light source 3 needs to be disassembled, the operator rotates the adjustment handle 62 of the adjustment disc 61 mounted on the bracket 13 on the back of the mounting base 1. The central rotating shaft fixedly connected to the adjustment handle 62 drives the adjustment disc 61 to rotate synchronously. Since the adjustment disc 61 is hinged with unlocking rods 611 around its perimeter, and the other end of the unlocking rods 611 is hinged to the mounting block 4122 on the outside of the connecting block 4112 in the main body plate 411, when the adjustment disc 61 rotates, it will transmit a pushing force to the mounting blocks 4122 on both sides through the unlocking rods 611, thereby driving the connecting block 4112 connected to the mounting block 4122 along the adjustment groove. 111 moves away from the LED light source 3, causing the connecting block 4112 to disengage from the second groove 312. Then, the LED light source 3 can be pushed from the back of the light source base 33, causing the connecting block 4112 to enter the first groove 311. As the connecting block 4112 moves within the first groove 311, it moves synchronously with the LED light source 3, causing the positioning plate 412, which is fitted on its outer side and adapted to the slot 31 of the LED light source 3, to disengage synchronously from the slot 31. This releases the fixing restriction on the LED light source 3, ultimately allowing the LED light source 3 to be removed from the mounting groove 11 for maintenance.

[0019] Example 2 This application discloses a liquid crystal display screen.

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A liquid crystal display (LCD) screen includes a backlight module for an LCD display screen as described above. A housing 7 is mounted on a mounting base 1. An LCD panel 8 is fixedly mounted inside the housing 7 on one side of a reflective film 2, and a backplate 9 is mounted on the other side. The backplate 9 is fixedly connected to the housing 7 by screws 91. After assembling the backlight module, the mounting base 1 of the assembled backlight module is first fitted into the housing 7 to ensure the backlight module is stably positioned within the housing 7. Then, the LCD panel 8 is precisely positioned and fixedly mounted inside the housing 7 on one side of the reflective film 2 of the backlight module, allowing the LCD panel 8 to receive light transmitted from the backlight module. Subsequently, the backplate 9 is mounted on the opposite side of the housing 7, i.e., the side of the mounting base 1 away from the reflective film 2. Finally, the backplate 9 is securely connected to the housing 7 by screws 91, forming a complete and stable whole from the housing 7, thus completing the assembly of the entire LCD screen and providing structural support and a light source for the subsequent display function of the LCD screen.

[0021] Working principle: During the backlight module assembly stage, the reflective film 2 is first installed on one side of the mounting base 1. Then, the LED light source 3 passes through the reflective film 2 and is inserted into the mounting groove 11 of the mounting base 1. During this process, because the outer diameter of the light source panel 32 is larger than that of the light source base 33, its inner side will push the drive rod 53 distributed along the installation direction of the LED light source 3. The drive rod 53 drives the adjusting rod 51 to move horizontally in the guide groove 12 through the hinged power rod 52, thereby driving the main body plate 411 in the adjusting grooves 111 on both sides of the mounting groove 11 to move closer to the LED light source 3. When the output end of the main body plate 411 is fitted with When the positioning plate 412 abuts against the bottom of the first slot 31 on the side wall of the LED light source 3, the positioning plate 412 is held in the first slot 31 by the action of the buffer spring. At this time, the LED light source 3 has not yet fully entered the mounting groove 11. During this process, the buffer spring between the end of the connecting block 4112 and the bottom of the connecting groove 4121 is compressed to generate elastic force. Under the push of this elastic force, the positioning plate 412 is in the first groove 311 and moves with the light source base 33 to precisely fit the second groove 312 near the LED panel side. Finally, the positioning plate 412 is stably inserted into the second groove 312. During disassembly and maintenance, rotate the adjustment handle 62 of the adjustment plate 61 on the back bracket 13 of the mounting base 1. This causes the adjustment plate 61 to pull the mounting block 4122 on the outside of the connecting block 4112 via the unlocking rod 611 hinged around the perimeter. This moves the connecting blocks 4112 on both sides away from the LED light source 3, allowing the connecting blocks 4112 to disengage from the second groove 312. Then, the LED light source 3 can be pushed from the back of the light source base 33, causing the connecting blocks 4112 to enter the first groove 311. As the connecting blocks 4112 move within the first groove 311, the synchronous movement of the LED light source 3 causes the positioning plate 412, which is fitted on its outside and matches the slot 31 of the LED light source 3, to simultaneously disengage from the slot 31. During the assembly of the LCD screen, the mounting base 1 of the assembled backlight module is fitted onto the outer shell 7. The LCD panel 8 is fixed to one side of the reflective film 2 inside the outer shell 7, and the back plate 9 is installed on the other side and fixed to the outer shell 7 with screws 91, thus completing the assembly of the entire LCD screen.

[0022] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A backlight module for a liquid crystal display screen, characterized in that: include Mounting base (1), a reflective film (2) is installed on one side of the mounting base (1), and an LED light source (3) is provided on one side of the reflective film (2). The mounting base (1) is provided with a mounting groove (11) adapted to the LED light source (3). The LED light source (3) passes through the reflective film (2) and is inserted into the mounting groove (11). Positioning components (4) for snapping and fixing the LED light source (3) are installed on both sides of the inner cavity of the mounting groove (11). The positioning component (4) includes a clamping plate (41) that is slidably installed in the adjustment groove (111) on the side wall of the mounting groove (11). The clamping plate (41) includes a main plate (411) and a positioning plate (412) fitted on the output end of the main plate (411). A buffer spring is provided between the positioning plate (412) and the main plate (411). The positioning plate (412) is adapted to the slot (31) on the side wall of the LED light source (3). The main plate (411) is also connected to a power mechanism (5) for driving it to clamp the LED light source (3) in the adjustment groove (111). The positioning plate (412) is connected to an unlocking mechanism (6) for driving it to disengage from the slot (31) on the side wall of the LED light source (3).

2. The backlight module for liquid crystal display according to claim 1, wherein: The power mechanism (5) has two sets, located on the upper and lower sides of the LED light source (3), including an adjustment rod (51) connected to the end of the main plate (411) and a power rod (52) connected to the other end of the adjustment rod (51). The adjustment rod (51) moves horizontally in the guide groove (12) on the mounting base (1). The two ends of the power rod (52) are respectively hinged to the adjustment rod (51) and the drive rod (53) that passes through the mounting base (1). The drive rod (53) is distributed along the installation direction of the LED light source (3).

3. The backlight module for liquid crystal display according to claim 2, wherein: The LED light source (3) includes a light source panel (32) and a light source base (33), wherein the outer diameter of the light source panel (32) is larger than that of the light source base (33), and the outer end of the drive rod (53) abuts against the inner side of the light source panel (32).

4. The backlight module for liquid crystal display according to claim 3, wherein: The main plate (411) includes a rectangular block (4111) slidably connected in the adjustment groove (111) and a connecting block (4112) on the side of the rectangular block (4111) near the LED light source (3). The outer diameter of the connecting block (4112) is smaller than that of the rectangular block (4111) and the connecting block (4112) is adapted to the connecting groove (4121) on the positioning plate (412). A buffer spring is provided between the end of the connecting block (4112) and the bottom of the connecting groove (4121).

5. The backlight module for liquid crystal display according to claim 4, wherein: The slot (31) on the side of the LED light source (3) includes a first slot (311) and a second slot (312) located at the bottom of the first slot (311), wherein the second slot (312) is located on the side of the first slot (311) close to the LED panel.

6. The backlight module for liquid crystal display according to claim 4, wherein: The unlocking mechanism (6) includes an adjustment plate (61) fixedly installed on the back of the mounting base (1), wherein the adjustment plate (61) is rotatably installed on the bracket (13) on the back of the mounting base (1), and the central pivot of the adjustment plate (61) passes through the bracket (13), and an adjustment handle (62) is fixed at the outer end of the central pivot.

7. The backlight module for liquid crystal display according to claim 6, wherein: The adjustment disc (61) is hinged around its perimeter with an unlocking rod (611), the other end of which is hinged to the mounting block (4122) on the outside of the connecting block (4112). When the adjustment disc (61) rotates, the unlocking rod (611) can drive the connecting blocks (4112) on both sides away.

8. A liquid crystal display screen comprising the backlight module for liquid crystal display screen according to any one of claims 1 to 7, characterized in that: The mounting base (1) is fitted with a housing (7). A liquid crystal panel (8) is fixedly installed inside the housing (7) and on one side of the reflective film (2). A back plate (9) is installed on the other side. The back plate (9) is fixedly connected to the housing (7) by screws (91).

Images