A backlight module with adjustable light output angle and control method thereof

Abstract

The present invention discloses a backlight module with adjustable light emission angle and a control method thereof, which relates to the technical field of mobile phone backlight modules, and includes a housing, a diffusion film, a light guide plate, an optical film and a lamp tube device, wherein the lamp tube device is installed on the left side of the inner wall of the housing, and the light guide plate is installed on the top of the lamp tube device. The present invention provides a connection limit mechanism to cooperate with a support adjustment mechanism to stably limit and buffer the optical film, and then uses a mobile adjustment mechanism to stably adjust the inclination of the optical film by cooperating with the connection limit mechanism and the support adjustment mechanism, and controls the adjustment inclination of the optical film by an adjustment detection mechanism, thereby solving the problem that the light emission angle of the existing backlight module is directly fixed during production and cannot be adjusted according to the use requirements in subsequent use, which results in the need to disassemble and reinstall the backlight module when the light emission angle needs to be adjusted, causing inconvenience in use and reducing the use effect of the backlight module.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone backlight modules, in particular to a backlight module with adjustable light emission angle and a control method thereof. Background Art

[0002] The mobile phone backlight module is one of the key components of the mobile phone display. Its main function is to provide a light source behind the mobile phone screen so that it can display images and text. The principle is that the lamp beads emit light, and the light enters the light guide plate after being reflected by the reflector, and is refracted and propagated in the light guide plate, making the light more evenly distributed. Then, the light is further uniformed after passing through the diffuser, and reaches the prism. The prism converges the light to increase the brightness and efficiency of the light. Finally, the light is emitted from the backlight module to provide a light source behind the mobile phone screen, so that the images and text on the screen can be clearly displayed.

[0003] Prism film is the most widely used brightening product in backlight modules today. It is suitable for LCD modules of various sizes. Almost all LCD backlight sources use prism film. Prism film is a transparent plastic film with a thickness of 50 to 300 microns. A prism structure is evenly and neatly covered on the upper surface of the film. The prism film is placed between the diffuser of the backlight source and the liquid crystal panel. Its function is to improve the angular distribution of light. It can converge the light emitted from the diffuser that is evenly divergent at all angles to the axial angle, that is, the normal viewing angle, and improve the axial brightness without increasing the total luminous flux.

[0004] The light output angle of the existing backlight module is directly fixed during production and cannot be adjusted according to usage requirements during subsequent use. This results in the backlight module needing to be disassembled and reinstalled when the light output angle needs to be adjusted, causing inconvenience in use and reducing the use effect of the backlight module. Summary of the invention

[0005] In order to solve the problems raised in the above-mentioned background technology, the purpose of the present invention is to provide a backlight module with adjustable light output angle, which has the advantage of adjusting the light output angle and solves the problem that the light output angle of the existing backlight module is directly fixed during production and cannot be adjusted according to usage requirements in subsequent use, which results in the backlight module needing to be disassembled and reinstalled when the light output angle needs to be adjusted, causing inconvenience in use and reducing the use effect of the backlight module.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a backlight module with adjustable light output angle, comprising a shell, a diffusion film, a light guide plate, an optical film and a lamp tube device, wherein the lamp tube device is installed on the left side of the inner wall of the shell, the light guide plate is installed on the top of the lamp tube device, the diffusion film is installed on the top of the shell, the optical film is arranged between the light guide plate and the diffusion film, a connection limiting mechanism is arranged on the outer side of the optical film, movable adjustment mechanisms are arranged on both sides of the outer side of the optical film, an adjustment detection mechanism is arranged on the outer side of the optical film, and a support adjustment mechanism is opened on the inner side of the inner wall of the shell.

[0007] As a preferred embodiment of the present invention, the connecting limit mechanism includes a limit plate, an inner side of the limit plate is provided with an installation groove, a plurality of the installation grooves are provided, and the plurality of installation grooves are equidistantly arranged, a connecting block is installed inside the installation groove, the inner side of the connecting block is fixedly connected to the outer side of the optical film, connecting columns are fixedly connected to both sides of the outer side of the limit plate, an arc-shaped adjustment groove is provided on the inner side of the inner wall of the shell, and the outer side of the surface of the connecting column is located inside the arc-shaped adjustment groove.

[0008] As a preferred embodiment of the present invention, the movable adjustment mechanism includes a limit ring, a positioning ring is fixedly connected to the interior of the limit ring, a positioning groove is opened on the surface of the connecting column, the interior of the positioning groove is movably connected to the interior of the positioning ring, a moving block is fixedly connected to the bottom of the limit ring, a first electric push rod is fixedly connected to the front side of the bottom of the moving block, a second electric push rod is fixedly connected to the rear side of the bottom of the moving block, support blocks are installed at the bottom of the first electric push rod and the second electric push rod, and the outer side of the support block is fixedly connected to the outer side of the inner wall of the shell.

[0009] As a preferred embodiment of the present invention, the adjustment detection mechanism includes a mobile sensor, a fixing groove is provided at the top of the inner wall of the arc-shaped adjustment groove, the top of the mobile sensor is fixedly connected to the top of the inner wall of the fixing groove, an LED light is fixedly connected to the front of the shell, the LED light is electrically connected to the mobile sensor through a wire, a sensing rod is provided at the bottom of the mobile sensor, the bottom of the sensing rod is fixedly connected to the top of the connecting column, and the mobile sensor is electrically connected to the first electric push rod and the second electric push rod through a wire.

[0010] As a preferred embodiment of the present invention, the supporting and adjusting mechanism includes a movable groove, a positioning block is movably connected inside the movable groove, a connecting rod is fixedly connected to the inner side of the positioning block, a fixed plate is fixedly connected to the inner side of the connecting rod, the inner side of the fixed plate is fixedly connected to the outer side of the optical film, the outer side of the fixed plate and both sides of the inner side of the limit plate are fixedly installed, an electromagnetic block is fixedly connected to the outer side of the inner wall of the movable groove, and an iron block is fixedly connected to the outer side of the positioning block.

[0011] As a preferred embodiment of the present invention, a movable column is fixedly connected to the outer side of the limit plate, a limit groove is provided on the outer side of the inner wall of the shell, the outer side of the surface of the movable column is movably connected to the inside of the limit groove, and a movable ring is fixedly connected to the outer side of the movable column, and the surface of the movable ring is movably connected to the inside of the limit groove.

[0012] As a preferred embodiment of the present invention, an elastic block is fixedly connected to the outer side of the iron block, a through hole is opened on the outer side of the elastic block, a plurality of through holes are provided, and the plurality of through holes are equidistantly arranged, and a damping spring is fixedly connected to the inner side of the electromagnetic block, and the damping spring is located inside the elastic block.

[0013] As a preferred embodiment of the present invention, a movable rod is fixedly connected to the outer side of the limit ring, connecting grooves are provided on both sides of the outer side of the inner wall of the shell, a sliding block is movably connected inside the connecting groove, and the inner side of the sliding block is fixedly connected to the outer side of the movable rod.

[0014] As a preferred embodiment of the present invention, an arc-shaped movable groove is opened on the outer side of the inner wall of the shell, the outer side of the fixed plate is located inside the arc-shaped movable groove, positioning plates are fixedly connected to both sides of the inner wall of the arc-shaped movable groove, and an elastic plate is fixedly connected to the inner side of the positioning plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention solves the problem that the light output angle of the existing backlight module is directly fixed during production and cannot be adjusted according to usage requirements in subsequent use, which results in the need to disassemble and reinstall the backlight module when the light output angle needs to be adjusted, causing inconvenience in use and reducing the use effect of the backlight module. The present invention further solves the problem that the light output angle of the existing backlight module is directly fixed during production and cannot be adjusted according to usage requirements in subsequent use, which results in the need to disassemble and reinstall the backlight module when the light output angle needs to be adjusted, causing inconvenience in use and reducing the use effect of the backlight module. The effect of adjusting the light output angle is achieved.

[0017] 2. The present invention sets a connection limit mechanism, and the limit plate is installed and fixed to the connection block through the installation groove, so that after the connection block is limited and fixed, the outer side of the optical film is driven to be limited and fixed. At the same time, the arc-shaped adjustment groove can limit the surface of the connecting column. After the connecting column is movably limited, it can drive the outer side of the limit plate to be moved. When the connecting column moves, it can follow the curvature of the arc-shaped adjustment groove, which is convenient for the connecting column to drive the optical film to stably adjust the light output angle through the limit plate and the connecting block when moving.

[0018] When the first electric push rod is started, the moving block on the front side can be pushed to move, and the moving block can push the limiting ring on the front side to move, and the limiting ring on the front side can push the positioning ring to engage with the positioning groove, so that the limiting ring can stably push and move the connecting column on the front side through the positioning ring and the positioning groove, and the connecting column can drive the front side of the optical film to move upward and adjust through the limiting plate and the connecting block, and the second electric push rod is started, and the output end of the second electric push rod drives the moving block, the limiting ring and the positioning ring on the rear side to move, and the rear positioning ring drives the connecting column to move downward through the positioning groove, and the connecting column drives the rear side of the optical film to move downward through the limiting plate and the connecting block, and effectively cooperates with the push of the first electric push rod on the other side of the optical film to tilt the overall angle of the optical film, so as to effectively adjust the light output angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional left-view structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional split structure of the present invention;

[0022] Figure 4 It is a schematic diagram of a partial cross-section of the three-dimensional structure of the shell of the present invention;

[0023] Figure 5 It is a schematic diagram of a partial cross-section of the three-dimensional structure of the shell of the present invention;

[0024] Figure 6 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0025] Figure 7 For the present invention Figure 5 Enlarged structural diagram at B in the middle.

[0026] In the figure: 1, housing; 2, diffusion film; 3, light guide plate; 4, optical film; 5, lamp tube device; 6, connection limit mechanism; 61, limit plate; 62, mounting groove; 63, connection block; 64, connection column; 65, arc adjustment groove; 7, mobile adjustment mechanism; 71, limit ring; 72, positioning ring; 73, positioning groove; 74, mobile block; 75, first electric push rod; 76, second electric push rod; 77, support block; 8, adjustment detection mechanism; 81, mobile sensor device; 82, fixing slot; 83, LED light; 84, sensing rod; 9, supporting and adjusting mechanism; 91, moving slot; 92, positioning block; 93, connecting rod; 94, fixing plate; 95, electromagnetic block; 96, iron block; 10, movable column; 11, limiting slot; 12, movable ring; 13, elastic block; 14, through hole; 15, damping spring; 16, movable rod; 17, connecting slot; 18, sliding block; 19, arc movable slot; 20, positioning plate; 21, elastic plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 7 As shown, a backlight module with adjustable light output angle provided by the present invention includes a shell 1, a diffusion film 2, a light guide plate 3, an optical film 4 and a lamp tube device 5, the lamp tube device 5 is installed on the left side of the inner wall of the shell 1, the light guide plate 3 is installed on the top of the lamp tube device 5, the diffusion film 2 is installed on the top of the shell 1, the optical film 4 is arranged between the light guide plate 3 and the diffusion film 2, a connection limiting mechanism 6 is arranged on the outer side of the optical film 4, both sides of the outer side of the optical film 4 are provided with movement adjustment mechanisms 7, an adjustment detection mechanism 8 is arranged on the outer side of the optical film 4, and a support adjustment mechanism 9 is opened on the inner side of the inner wall of the shell 1.

[0029] refer to Figure 7 The connection limit mechanism 6 includes a limit plate 61, and a mounting groove 62 is opened on the inner side of the limit plate 61. There are a plurality of mounting grooves 62, and the plurality of mounting grooves 62 are arranged at equal distances. A connecting block 63 is installed inside the mounting groove 62. The inner side of the connecting block 63 is fixedly connected to the outer side of the optical film 4. Connecting columns 64 are fixedly connected to both sides of the outer side of the limit plate 61. An arc-shaped adjustment groove 65 is opened on the inner side of the inner wall of the shell 1, and the outer side of the surface of the connecting column 64 is located inside the arc-shaped adjustment groove 65.

[0030] As a technical optimization scheme of the present invention, by setting a connecting limit mechanism 6, the limit plate 61 installs and fixes the connecting block 63 through the installation groove 62, so that after the connecting block 63 is limited and fixed, it drives the outer side of the optical film 4 to be limited and fixed. At the same time, the arc-shaped adjustment groove 65 can limit the surface activity of the connecting column 64. After the connecting column 64 is limited, it can drive the outer side of the limit plate 61 to be limited. When moving, the connecting column 64 can follow the curvature of the arc-shaped adjustment groove 65, so that the connecting column 64 can drive the optical film 4 to stably adjust the light output angle through the limit plate 61 and the connecting block 63 when moving.

[0031] refer to Figure 6 The movable adjustment mechanism 7 includes a limit ring 71, a positioning ring 72 is fixedly connected to the inside of the limit ring 71, a positioning groove 73 is opened on the surface of the connecting column 64, the inside of the positioning groove 73 is movably connected to the inside of the positioning ring 72, a moving block 74 is fixedly connected to the bottom of the limit ring 71, a first electric push rod 75 is fixedly connected to the front side of the bottom of the moving block 74, and a second electric push rod 76 is fixedly connected to the rear side of the bottom of the moving block 74. Support blocks 77 are installed at the bottom of the first electric push rod 75 and the second electric push rod 76, and the outer side of the support block 77 is fixedly connected to the outer side of the inner wall of the shell 1.

[0032] As a technical optimization solution of the present invention, by setting the moving adjustment mechanism 7, when it is necessary to adjust the light output angle of the optical film 4, the first electric push rod 75 can be started to push upward, and the second electric push rod 76 can be started to move downward. The first electric push rod 75 can be started to push the moving block 74 on the front side to move, and the movement of the moving block 74 can push the limiting ring 71 on the front side to move. The movement of the limiting ring 71 on the front side can push the positioning ring 72 to engage with the positioning groove 73, so that the limiting ring 71 can stably push the connecting column 64 on the front side through the positioning ring 72 and the positioning groove 73 to move, and the connecting column 64 on the front side can be connected. The movement of the connecting column 64 can be adjusted by driving the front side of the optical film 4 to move upward through the limit plate 61 and the connecting block 63. The second electric push rod 76 is started, and the output end of the second electric push rod 76 drives the moving block 74, the limit ring 71 and the positioning ring 72 on the rear side to move. The rear positioning ring 72 drives the connecting column 64 to move downward through the positioning groove 73. The connecting column 64 drives the rear side of the optical film 4 to move downward through the limit plate 61 and the connecting block 63, which effectively cooperates with the push of the first electric push rod 75 on the other side of the optical film 4 to tilt the overall angle of the optical film 4, and effectively adjust the light output angle.

[0033] refer to Figure 6The adjustment detection mechanism 8 includes a motion sensor 81. A fixing groove 82 is provided at the top of the inner wall of the arc-shaped adjustment groove 65. The top of the motion sensor 81 is fixedly connected to the top of the inner wall of the fixing groove 82. An LED lamp 83 is fixedly connected to the front of the shell 1. The LED lamp 83 is electrically connected to the motion sensor 81 through a wire. A sensing rod 84 is provided at the bottom of the motion sensor 81. The bottom of the sensing rod 84 is fixedly connected to the top of the connecting column 64. The motion sensor 81 is electrically connected to the first electric push rod 75 and the second electric push rod 76 through a wire.

[0034] As a technical optimization scheme of the present invention, by setting an adjustment detection mechanism 8, when the connecting column 64 moves for adjustment during use, the connecting column 64 can push the sensing rod 84 to move, and the movement of the sensing rod 84 can facilitate the detection of the mobile sensor 81. After the mobile sensor 81 detects, the LED light 83 can be started, so that the LED light 83 emits a blue light to remind the user that it is in normal adjustment. When the sensing rod 84 moves to the bottom of the mobile sensor 81, the mobile sensor 81 senses that the moving distance of the sensing rod 84 reaches a threshold and can start the LED light 83 to emit a red light, which conveniently and timely reminds the user that the adjustment limit has been reached. At the same time, the mobile sensor 81 can turn off the first electric push rod 75 and the second electric push rod 76 to avoid damage to the optical film 4 due to movement beyond the threshold.

[0035] refer to Figure 4 The supporting and adjusting mechanism 9 includes a movable groove 91, a positioning block 92 is movably connected inside the movable groove 91, a connecting rod 93 is fixedly connected to the inner side of the positioning block 92, a fixing plate 94 is fixedly connected to the inner side of the connecting rod 93, the inner side of the fixing plate 94 is fixedly connected to the outer side of the optical film 4, the outer side of the fixing plate 94 is fixedly installed on both sides of the inner side of the limiting plate 61, an electromagnetic block 95 is fixedly connected to the outer side of the inner wall of the movable groove 91, and an iron block 96 is fixedly connected to the outer side of the positioning block 92.

[0036] As a technical optimization scheme of the present invention, by setting a support adjustment mechanism 9, the movable groove 91 can limit the outer side of the positioning block 92. After the positioning block 92 is limited, it can drive the outer side of the connecting rod 93 to limit the outer side of the optical film 4 through the fixed plate 94 and the limiting plate 61. When the limiting plate 61 moves, it can also drive the fixed plate 94 to move. The movement of the fixed plate 94 can stably drive the optical film 4 to move, thereby enhancing the adjustment stability of the optical film 4. When adjusting in use, the upper electromagnetic block 95 on the lifting side can be started, and the lower electromagnetic block 95 on the descending side can be started, so that the electromagnetic block 95 can start the output to generate a magnetic attraction to the iron block 96. After the iron block 96 is subjected to the magnetic attraction, it can drive the positioning block 92 to move. The movement of the positioning block 92 can drive the connecting rod 93 and the fixed plate 94 to move, thereby enhancing the movement stability of the optical film 4 and avoiding the optical film 4 from tilting in the middle of the two sides when moving.

[0037] refer to Figure 7 A movable column 10 is fixedly connected to the outer side of the limiting plate 61, a limiting groove 11 is provided on the outer side of the inner wall of the shell 1, the outer side of the surface of the movable column 10 is movably connected to the inside of the limiting groove 11, and a movable ring 12 is fixedly connected to the outer side of the movable column 10, and the surface of the movable ring 12 is movably connected to the inside of the limiting groove 11.

[0038] As a technical optimization scheme of the present invention, by setting a movable column 10, a limiting groove 11 and a movable ring 12, the limiting groove 11 can limit the outer side of the movable column 10, so that after the movable column 10 is limited, it can drive the movable column 10 to be limited, and after the movable column 10 is limited, it can limit the outer side of the limiting plate 61, so that when the optical film 4 is adjusted, the limiting plate 61 can stably drive the optical film 4 to be limited, thereby enhancing the adjustment stability of the optical film 4.

[0039] refer to Figure 4 An elastic block 13 is fixedly connected to the outer side of the iron block 96, and a through hole 14 is opened on the outer side of the elastic block 13. There are a plurality of through holes 14, and the plurality of through holes 14 are equidistantly arranged. A damping spring 15 is fixedly connected to the inner side of the electromagnetic block 95, and the damping spring 15 is located inside the elastic block 13.

[0040] As a technical optimization scheme of the present invention, by setting the elastic block 13, the through hole 14 and the damping spring 15, the elastic block 13 can support and buffer the outer side of the iron block 96. At the same time, the through hole 14 can facilitate better deformation buffering of the elastic block 13. The spring damping can damp and buffer the movement of the iron block 96 and the elastic block 13, thereby preventing the electromagnetic block 95 from generating a magnetic attraction to the iron block 96, and the iron block 96 pushes the elastic block 13 to move faster, causing the positioning block 92 and the fixed plate 94 to move with it, and the fixed block causes the optical film 4 to be dislocated and damaged.

[0041] refer to Figure 6 The outer side of the limiting ring 71 is fixedly connected with a movable rod 16, and connecting grooves 17 are provided on both sides of the outer side of the inner wall of the shell 1. The inner side of the connecting groove 17 is movably connected with a sliding block 18, and the inner side of the sliding block 18 is fixedly connected to the outer side of the movable rod 16.

[0042] As a technical optimization solution of the present invention, by setting a movable rod 16, a connecting groove 17 and a sliding block 18, the movable rod 16 can move with the limiting ring 71, and at the same time the connecting groove 17 can limit the surface of the sliding block 18. After the sliding block 18 is limited, it can drive the movable rod 16 to be limited. After the movable rod 16 is limited, it can drive the outer side of the limiting ring 71 to be limited, so that the limiting ring 71 can stably move to adjust the movement of the connecting column 64, thereby avoiding the situation where the limiting ring 71 is shaken and tilted by force during use, causing the limiting plate 61 to bend and be damaged.

[0043] refer to Figure 3 An arc-shaped movable groove 19 is opened on the outer side of the inner wall of the shell 1, the outer side of the fixed plate 94 is located inside the arc-shaped movable groove 19, and positioning plates 20 are fixedly connected to both sides of the inner wall of the arc-shaped movable groove 19, and an elastic plate 21 is fixedly connected to the inner side of the positioning plate 20.

[0044] As a technical optimization scheme of the present invention, by setting an arc-shaped movable groove 19, a positioning plate 20 and an elastic plate 21, the arc-shaped movable groove 19 can limit the outer movable position of the positioning plate 20 to avoid the outer side of the fixing plate 94 and the inner side of the shell 1 from frictionally contacting the outer side of the fixing plate 94 and the optical film 4 when they move, resulting in the fixing plate 94 being unable to move effectively. The positioning plate 20 can limit the moving range of the fixing plate 94 to avoid the fixing plate 94 moving out of the arc-shaped movable groove 19 and being damaged. The elastic plate 21 can elastically buffer the inner side of the positioning plate 20 during use to avoid a hard collision between the fixing plate 94 and the positioning plate 20, resulting in damage to the optical film 4.

[0045] The working principle and use process of the present invention are as follows: when in use, the limit plate 61 fixes the connecting block 63 through the installation groove 62, so that the connecting block 63 is limited and fixed, and then the outer side of the optical film 4 is limited and fixed. At the same time, the arc-shaped adjustment groove 65 can limit the surface of the connecting column 64. After the connecting column 64 is limited, it can drive the outer side of the limit plate 61 to limit. When the connecting column 64 moves, it can follow the curvature of the arc-shaped adjustment groove 65, so that the connecting column 64 can drive the optical film 4 to stably adjust the light output angle through the limit plate 61 and the connecting block 63 when moving. When the light output angle of the optical film 4 needs to be adjusted, the first electric push rod 75 can be started to push upward, and the second electric push rod 76 can be started to move downward. The first electric push rod 75 can be started to The front moving block 74 is pushed to move, and the movement of the moving block 74 can push the limiting ring 71 on the front side to move. The movement of the limiting ring 71 on the front side can push the positioning ring 72 to engage with the positioning groove 73, so that the limiting ring 71 can stably push and move the front connecting column 64 through the positioning ring 72 and the positioning groove 73. The movement of the connecting column 64 can drive the front side of the optical film 4 to move upward and adjust through the limiting plate 61 and the connecting block 63. The second electric push rod 76 is started, and the output end of the second electric push rod 76 drives the moving block 74, the limiting ring 71 and the positioning ring 72 on the rear side to move downward. The rear positioning ring 72 drives the connecting column 64 downward through the positioning groove 73, and the connecting column 64 drives the rear side of the optical film 4 to move upward through the limiting plate 61 and the connecting block 63. The optical film 4 moves downward, effectively cooperating with the push of the first electric push rod 75 on the other side of the optical film 4, so that the overall angle of the optical film 4 is tilted, and the light output angle is effectively adjusted. At the same time, when the connecting column 64 moves for adjustment, the connecting column 64 can push the sensing rod 84 to move. The movement of the sensing rod 84 can facilitate the detection of the mobile sensor 81. After the mobile sensor 81 detects, the LED light 83 can be started, so that the LED light 83 emits a blue light to remind the user that the adjustment is normal. When the sensing rod 84 moves to the bottom of the mobile sensor 81, the mobile sensor 81 senses that the moving distance of the sensing rod 84 reaches the threshold, and the LED light 83 can be started to emit a red light, which is convenient and timely to remind the user that the adjustment limit has been reached. At the same time, the mobile sensor 81 can be turned off. The first electric push rod 75 and the second electric push rod 76 are closed to avoid the situation where the optical film 4 is damaged due to movement beyond the threshold. The moving groove 91 can limit the outer side of the positioning block 92. After the positioning block 92 is limited, it can drive the outer side of the connecting rod 93 to limit. The connecting rod 93 can limit the outer side of the optical film 4 through the fixing plate 94 in cooperation with the limiting plate 61. When the limiting plate 61 moves, it can also drive the fixing plate 94 to move. The movement of the fixing plate 94 can stably drive the optical film 4 to move, thereby enhancing the adjustment stability of the optical film 4. When adjusting in use, the upper electromagnetic block 95 on the lifting side can be started, and the lower electromagnetic block 95 on the descending side can be started, so that the corresponding electromagnetic block 95 can start the output to generate a magnetic attraction to the iron block 96.The iron block 96 can drive the positioning block 92 to move after being subjected to magnetic attraction, and the movement of the positioning block 92 can drive the connecting rod 93 and the fixing plate 94 to move, thereby enhancing the movement stability of the optical film 4 and preventing the optical film 4 from tilting in the middle of both sides when moving, thereby achieving the effect of adjusting the light output angle and enhancing the use effect of the backlight module.

[0046] To sum up: this backlight module with adjustable light output angle, by setting a connecting limit mechanism 6 to cooperate with the supporting adjustment mechanism 9 to stably limit the optical film 4, and then by moving the adjustment mechanism 7 to cooperate with the connecting limit mechanism 6 and the supporting adjustment mechanism 9 to stably adjust the inclination of the optical film 4, and by adjusting the detection mechanism 8 to detect and control the adjustment inclination of the optical film 4, solves the problem that the light output angle of the existing backlight module is directly fixed during production and cannot be adjusted according to usage requirements in subsequent use, which results in the backlight module needing to be disassembled and reinstalled when the light output angle needs to be adjusted, causing inconvenience in use and reducing the use effect of the backlight module.

[0047] Based on the above-mentioned backlight module with adjustable light emission angle, an embodiment of the present invention further proposes a control method of the backlight module with adjustable light emission angle. Exemplarily, the control method includes:

[0048] The limit mechanism is connected to the outer side of the optical film to limit the support, so that the outer side of the optical film can be tilted and moved within a certain range;

[0049] The moving adjustment mechanism is started to cooperate with the connection limit mechanism to push one side of the optical film upward and drive the other side to move downward;

[0050] When the optical film is adjusted and moved, the connection limit mechanism and the support adjustment mechanism cooperate to stably limit the outer side of the optical film, so that the entire optical film follows the adjustment movement of the moving adjustment mechanism;

[0051] The support adjustment mechanism can provide elastic buffer support to the outer side of the optical diaphragm when the optical diaphragm is adjusted;

[0052] The detection and adjustment mechanism is started, and the detection and adjustment mechanism cooperates with the connection limit mechanism to detect and remind the tilt angle of the optical film;

[0053] The detection and adjustment mechanism detects that the optical diaphragm is adjusted to the limit, and directly closes the movement and adjustment mechanism to stop adjusting the optical diaphragm.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A backlight module with adjustable light output angle, comprising a housing (1), a diffusion film (2), a light guide plate (3), an optical film (4) and a lamp tube device (5), characterized in that: The lamp tube device (5) is mounted on the left side of the inner wall of the housing (1); the light guide plate (3) is mounted on the top of the lamp tube device (5); the diffusion film (2) is mounted on the top of the housing (1); the optical film (4) is arranged between the light guide plate (3) and the diffusion film (2); a connection limit mechanism (6) is arranged on the outer side of the optical film (4); both sides of the outer side of the optical film (4) are provided with movement adjustment mechanisms (7); the connection limit mechanism (6) comprises a limit plate (61); a mounting groove (62) is provided on the inner side of the limit plate (61); a plurality of the mounting grooves (62) are provided, and the plurality of mounting grooves (62) are arranged at equal distances; a connection block (63) is installed inside the mounting groove (62); the inner side of the connection block (63) is fixedly connected to the outer side of the optical film (4); both sides of the outer side of the limit plate (61) are fixedly connected with connection columns (64). The inner side of the inner wall of the shell (1) is provided with an arc-shaped adjustment groove (65), the outer side of the surface of the connecting column (64) is located inside the arc-shaped adjustment groove (65), the movable adjustment mechanism (7) comprises a limit ring (71), the interior of the limit ring (71) is fixedly connected with a positioning ring (72), the surface of the connecting column (64) is provided with a positioning groove (73), the interior of the positioning groove (73) is movably connected with the interior of the positioning ring (72), the bottom of the limit ring (71) is fixedly connected with a moving block (74), the front side of the bottom of the moving block (74) is fixedly connected with a first electric push rod (75), the rear side of the bottom of the moving block (74) is fixedly connected with a second electric push rod (76), the bottoms of the first electric push rod (75) and the second electric push rod (76) are both installed with support blocks (77), the outer side of the support block (77) is fixedly connected with the outer side of the inner wall of the shell (1).

2. The backlight module with adjustable light output angle according to claim 1, characterized in that: The backlight module also includes an adjustment detection mechanism (8), which is arranged on the outer side of the optical film (4), and includes a motion sensor (81). A fixing groove (82) is provided at the top of the inner wall of the arc-shaped adjustment groove (65), and the top of the motion sensor (81) is fixedly connected to the top of the inner wall of the fixing groove (82). An LED lamp (83) is fixedly connected to the front of the shell (1), and the LED lamp (83) is electrically connected to the motion sensor (81) through a wire. A sensing rod (84) is provided at the bottom of the motion sensor (81), and the bottom of the sensing rod (84) is fixedly connected to the top of the connecting column (64). The motion sensor (81) is electrically connected to the first electric push rod (75) and the second electric push rod (76) through a wire.

3. The backlight module with adjustable light output angle according to claim 1, characterized in that: The backlight module also includes a support adjustment mechanism (9), which is arranged on the inner side of the inner wall of the shell (1), and includes a movable groove (91), the inner side of the movable groove (91) is movably connected with a positioning block (92), the inner side of the positioning block (92) is fixedly connected with a connecting rod (93), the inner side of the connecting rod (93) is fixedly connected with a fixing plate (94), the inner side of the fixing plate (94) is fixedly connected with the outer side of the optical film (4), the outer side of the fixing plate (94) is fixedly installed with both sides of the inner side of the limiting plate (61), the outer side of the inner wall of the movable groove (91) is fixedly connected with an electromagnetic block (95), and the outer side of the positioning block (92) is fixedly connected with an iron block (96).

4. The backlight module with adjustable light output angle according to claim 1, characterized in that: A movable column (10) is fixedly connected to the outer side of the limiting plate (61); a limiting groove (11) is provided on the outer side of the inner wall of the shell (1); the outer side of the surface of the movable column (10) is movably connected to the inside of the limiting groove (11); a movable ring (12) is fixedly connected to the outer side of the movable column (10); and the surface of the movable ring (12) is movably connected to the inside of the limiting groove (11).

5. The backlight module with adjustable light output angle according to claim 3, characterized in that: An elastic block (13) is fixedly connected to the outer side of the iron block (96), a through hole (14) is opened on the outer side of the elastic block (13), a plurality of through holes (14) are provided, and the plurality of through holes (14) are arranged at equal distances, and a damping spring (15) is fixedly connected to the inner side of the electromagnetic block (95), and the damping spring (15) is located inside the elastic block (13).

6. The backlight module with adjustable light output angle according to claim 1, characterized in that: The outer side of the limiting ring (71) is fixedly connected to a movable rod (16), and connecting grooves (17) are provided on both sides of the outer side of the inner wall of the shell (1). A sliding block (18) is movably connected inside the connecting groove (17), and the inner side of the sliding block (18) is fixedly connected to the outer side of the movable rod (16).

7. The backlight module with adjustable light output angle according to claim 3, characterized in that: An arc-shaped movable groove (19) is provided on the outer side of the inner wall of the shell (1), the outer side of the fixed plate (94) is located inside the arc-shaped movable groove (19), positioning plates (20) are fixedly connected to both sides of the inner wall of the arc-shaped movable groove (19), and an elastic plate (21) is fixedly connected to the inner side of the positioning plate (20).

8. A backlight module control method with adjustable light output angle applied to any one of claims 1-7, characterized in that: The control method comprises: The limit mechanism is connected to the outer limit support of the optical film, and the optical film can be tilted and moved within a certain range; The moving adjustment mechanism is started to cooperate with the connection limit mechanism to push one side of the optical film upward and drive the other side to move downward for adjustment; When the optical film is adjusted and moved, the connection limit mechanism and the support adjustment mechanism cooperate to stably limit the outer side of the optical film, so that the entire optical film follows the adjustment movement of the moving adjustment mechanism; The support adjustment mechanism can provide elastic buffer support to the outer side of the optical diaphragm when the optical diaphragm is adjusted; The detection and adjustment mechanism is started, and the detection and adjustment mechanism cooperates with the connection limit mechanism to detect and remind the tilt angle of the optical film; The detection and adjustment mechanism detects that the optical diaphragm is adjusted to the limit, and directly closes the movement and adjustment mechanism to stop adjusting the optical diaphragm.

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