CN117930546B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN117930546B CN117930546B CN202410327108.5A CN202410327108A CN117930546B CN 117930546 B CN117930546 B CN 117930546B CN 202410327108 A CN202410327108 A CN 202410327108A CN 117930546 B CN117930546 B CN 117930546B
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- backlight module
- side wall
- light guide
- guide plate
- annular groove
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- 238000013016 damping Methods 0.000 claims abstract description 89
- 230000002596 correlated effect Effects 0.000 claims abstract description 7
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- 239000007788 liquid Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 description 10
- 230000000875 corresponding effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000011324 bead Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 238000007667 floating Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application provides a backlight module and a display device, and relates to the technical field of display, wherein the backlight module comprises a back plate, a light guide plate, a controller, a damping device and a sensor, wherein the damping device and the sensor are electrically connected with the controller; the sensor is used for detecting the falling height of the backlight module, and two ends of the damping device are abutted between the inner side wall of the back plate and the outer side wall of the light guide plate along the first direction and used for limiting the light guide plate; the controller is used for controlling the damping force generated by the damping device according to the falling height, and the damping force is positively correlated with the falling height. The technical scheme provided by the application can reduce the situation that the light guide plate impacts the light bar.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a backlight module and a display device.
Background
The backlight module is an important component of the liquid crystal display device and has the function of providing backlight with uniform distribution for the display panel, and the performance of the backlight module directly influences the display quality of the display panel.
The light bar of the backlight module is usually arranged on the inner side wall of the back plate, the linear light source is converted into a uniform surface light source through the scattering direction of light guided by the light guide plate, and the light guide efficiency of the light guide plate is inversely proportional to the gap between the light guide plate and the light bar. Therefore, the related art generally employs a design manner that reduces the gap between the light guide plate and the light bar as much as possible to improve the light guiding efficiency of the light guide plate.
However, when the display device falls, the light guide plate is easy to strike the light bar to damage the light beads, so that the display problems of light leakage, poor uniformity and the like of the backlight module are caused, and the service life of the display device is shortened.
Disclosure of Invention
In view of this, the present application provides a backlight module and a display device for reducing the impact of the light guide plate on the light bar, thereby prolonging the service life of the display device.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a backlight module, including: the device comprises a back plate, a light guide plate, a controller, a damping device and a sensor, wherein the damping device and the sensor are electrically connected with the controller;
The sensor is used for detecting the falling height of the backlight module, and two ends of the damping device are abutted between the inner side wall of the back plate and the outer side wall of the light guide plate and used for limiting the light guide plate;
the controller is used for controlling the damping force generated by the damping device according to the falling height, and the damping force is positively correlated with the falling height.
In a possible implementation manner of the first aspect, the damping device includes a strut, a housing, a motor located in the housing, and a rotating assembly;
The inner cavity of the box body is sealed with liquid;
the first end of the supporting rod is abutted against the light guide plate, the second end of the supporting rod penetrates through the first end face of the box body to be fixedly connected with the motor, and the second end face of the box body is abutted against the inner side wall of the back plate;
The motor is connected with the rotating assembly and used for driving the rotating assembly to rotate under the control of the controller, and the rotating assembly can stretch along the radial direction under the action of the rotating force, wherein the stretching amount of the rotating assembly is positively correlated with the rotating speed of the motor and the damping force.
In a possible implementation manner of the first aspect, the first end opening of the strut forms a cavity, and the motor is fixed in the cavity.
In a possible implementation manner of the first aspect, the first end surface of the rotating assembly is provided with a driving groove and a first annular groove located at the periphery of the driving groove;
the driving shaft of the motor is fixed in the driving groove;
the second end of the supporting rod stretches into the first annular groove, and a bearing is connected between the outer side wall of the supporting rod and the inner side wall of the first annular groove;
The outer ring of the bearing is fixed in the inner side wall of the first annular groove, the inner ring of the bearing is connected with the second end of the supporting rod, and a gap exists between the inner ring of the bearing and the bottom wall of the first annular groove.
In a possible implementation of the first aspect, the rotating assembly comprises a rotating disc, an elastic member and blades,
The side wall of the rotating disc is inwards recessed to form a second annular groove, one end of the elastic piece is fixed in the second annular groove, the other end of the elastic piece is connected with the blades, and when the elastic piece is in a natural state, the blades shrink in the second annular groove; the elastic piece can stretch and retract along the radial direction of the rotating disc;
The first end face of the rotating disc is connected with the motor, and the second end face of the rotating disc is concave inwards to form an inclined plane.
In a possible implementation manner of the first aspect, the elastic member includes a plurality of elastic members, and the plurality of elastic members are circumferentially arranged at intervals along the second annular groove; each elastic piece is connected with the blade in a one-to-one correspondence.
In a possible implementation manner of the first aspect, distance blocks are further arranged between adjacent blades, one ends of the distance blocks are fixed in the second annular groove, and the other ends of the distance blocks extend out of the second annular groove to be in contact with the inner side wall of the box body.
In a possible implementation manner of the first aspect, the damping device includes a plurality of damping devices, and the plurality of damping devices are disposed between the light incident side wall of the light guide plate and the inner side wall of the back plate at intervals.
In a possible implementation manner of the first aspect, the damping devices include two damping devices, and the two damping devices are separately disposed at two ends of the light incident side wall of the light guide plate.
In a second aspect, an embodiment of the present application provides a display apparatus, including: the backlight module and the display panel according to the first aspect or any of the embodiments of the first aspect are disposed on a light emitting side of the backlight module.
The backlight module provided by the embodiment of the application comprises: the device comprises a back plate, a light guide plate, a controller, a damping device and a sensor, wherein the damping device and the sensor are electrically connected with the controller; the sensor is used for detecting the falling height of the backlight module, and two ends of the damping device are abutted between the inner side wall of the back plate and the outer side wall of the light guide plate and used for limiting the light guide plate, so that the controller can control the damping force generated by the damping device according to the falling height to limit the light guide plate, the situation that the light guide plate is impacted against the light bar to cause damage to the light beads is reduced, and the service life of the backlight module is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a damping device according to an embodiment of the present application;
Fig. 3A to 3D are schematic structural views of a rotating assembly in a stationary state according to an embodiment of the present application;
fig. 3E to fig. 3G are schematic structural diagrams of a rotating assembly in an operating state according to an embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of a rotary disk according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application.
Reference numerals illustrate:
1-a back plate; 2-a light guide plate; 3-a light bar; 4-a damping device;
41-a strut; 42-a box body; 43-motor; 44-a rotating assembly; 441-a drive slot; 442-a first annular groove; 443-rotating the disc; 4431-second an annular groove; 444-elastic member; 445-leaf; 446-distance blocks; 45-bearing;
100-a display panel; 200-backlight module.
Detailed Description
The terminology used in the description of the embodiments of the application is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
The lifetime of the display device is one of the important conditions for a user to judge the reliability of the display device. In order to reduce the damage of the lamp beads caused by the light guide plate striking the lamp strip due to the falling of the display device, the embodiment of the application provides a backlight module which can comprise a back plate, a light guide plate, a controller, a damping device and a sensor, wherein the damping device and the sensor are electrically connected with the controller; the sensor can be used for detecting the falling height of the backlight module, and two ends of the damping device can be abutted between the inner side wall of the back plate and the outer side wall of the light guide plate and used for limiting the light guide plate; the controller can be used for controlling the damping force generated by the damping device according to the falling height, and the damping force is positively correlated with the falling height.
Embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present application, as shown in fig. 1, the backlight module includes a back plate 1 and a light guide plate 2 disposed on an inner sidewall of the back plate. The light guide plate 2 may be disposed opposite to the light bar 3 disposed on the inner wall of the back plate 1, so that the light guide plate 2 may convert a point light source emitted from the light bar 3 into a uniform surface light source. For convenience of description, the side wall of the back plate 1 on which the light bar 3 is disposed will be simply referred to as a light emitting side wall.
In order to reduce the damage to the beads caused by the light guide plate 2 striking the light bar 3, a damping device 4 may be provided between the light-emitting side wall of the back plate 1 and the light-entering side wall of the light guide plate 2. The damping device 4 may provide a damping force opposite to the striking direction (the direction in which the light incident side wall of the light guide plate 2 is directed to the light emergent side wall of the back plate 1) to limit the light guide plate 2 when the light guide plate 2 strikes the light bar. The damping device 4 can be directly assembled in a backboard factory, so that the production flow and the labor cost can be reduced, and the product yield can be improved.
The number of damping means 4 may be set to one in order to reduce the space occupied by the damping means 4 by the light-emitting side walls. Of course, the number of the damping devices 4 may be plural, so that the light guide plate 2 may be better limited. The damping devices 4 may be disposed between the light incident side wall of the light guide plate 2 and the light emergent side wall of the back plate at intervals.
In the exemplary embodiment, fig. 1 illustrates an exemplary case where the number of the damping devices 4 is two, and the two damping devices 4 are separately disposed at two ends of the light incident side wall (i.e., two ends of the light emergent side wall) of the light guide plate 2. In practical application, the number of the damping devices 4 can be selected according to the size of the light guide plate 2, without redesigning, so that the application range of the damping devices 4 can be improved.
It can be understood that the damping device 4 may also be disposed around the light guide plate 2, so that the light incident side wall of the light guide plate 2 always maintains a proper distance from the light bar 3, thereby improving the light incident amount of the light guide plate 2 and further improving the light guiding efficiency of the light guide plate 2. The specific setting position of the damping device 4 may be selected according to actual needs, and the embodiment of the present application is not particularly limited.
In order to improve the accuracy of the magnitude of the damping force provided by the damping device 4, a sensor (not shown) may be used to detect the falling height of the backlight module, which may be provided on any component of the backlight module, and by setting the position of the sensor, the falling data of the corresponding component may be detected. The sensor may include, but is not limited to, an acceleration sensor, a distance measuring sensor, a camera, etc., wherein the camera may be an infrared camera or a visible light camera.
The sensor can acquire the falling height of the backlight module by detecting falling data such as falling time, falling position, falling angle, falling speed and the like. The number of the sensors can be multiple, and the multiple sensors can be the same type of sensor or a combination of different types of sensors.
The sensor can detect falling data when acquiring that the backlight module is in a falling state, and can generate falling height according to the falling data. For example, the sensor may be an acceleration sensor, and when the acceleration sensor detects that the acceleration of the backlight module exceeds the target threshold, it may determine that the backlight module is in a weightless state (falling state), and determine the falling height according to the falling time of the backlight module.
In some embodiments, the sensor may also send the detection data to other computing devices and be calculated by the computing devices to generate the fall height.
The backlight module may further include a controller (not shown) that may control the magnitude of the damping force provided by the damping device 4 to the light guide plate 2 according to the drop height detected by the sensor. The controller may be a separately provided hardware device or the functions may be integrated in the central controller. The controller may be electrically connected to the damping device 4 and the sensor through wires, or may be electrically connected to the damping device 4 and the sensor by wireless communication, such as wireless fidelity, bluetooth, etc., and the specific connection mode may be selected according to actual needs, which is not particularly limited in the present application.
The controller can calculate the impact force corresponding to the falling height of the backlight module in real time according to the falling height after the falling height is obtained. Specifically, according to the law of conservation of momentum, the following formula can be determined:
wherein m is the mass of the display device, g is the gravitational acceleration, g=9.80 m/s 2, h is the falling height of the backlight module, and t is the falling time.
According to the formula, the controller can determine the impact force of the backlight module when the backlight module falls according to the falling height, and control the damping force generated by the damping device 4 according to the impact force, wherein the damping force is positively correlated with the falling height, and the damping force is not less than the impact force, so that the light guide plate 2 can be buffered, and the situation that the light guide plate 2 impacts the light bar 3 is reduced.
Fig. 2 is a schematic structural diagram of a damping device according to an embodiment of the present application, and as shown in fig. 2, the damping device 4 may include a strut 41, a housing 42, a motor 43 located in the housing 42, and a rotating assembly 44.
The first end of the supporting rod 41 may be abutted against the light guide plate 2, and the second end of the supporting rod 41 may pass through the first end surface of the case 42 and be fixedly connected with the motor 43. The strut 41 may be made of metal or the like, and of course, the strut 41 may be made of a hard composite material, thereby improving the weight reduction and corrosion resistance of the damper device 4. Alternatively, a buffer material may be provided at the first ends of the struts 41, so that the light guide plate 2 may be better buffered.
In some embodiments, the strut 41 may be disposed at a first end face of the motor 43. In order to reduce the volume of the damping device 4, referring to fig. 2, the first end of the strut 41 may be opened to form a cavity, and the motor 43 may be fixed in the cavity, so that the structure may be simplified, and the space utilization of the damping device may be improved.
In the inner cavity of the tank 42, a liquid of known density such as water or oil may be sealed, and for convenience of description, water will be exemplified below. The cross-section of the interior cavity of the housing 42 may be of any shape, for example, the cross-section may be circular, thereby increasing the capacity of the housing 42. In order to prevent the liquid from flowing out of the tank 42, a sealing ring may be provided between the opening of the tank 42 and the strut 41, thereby prolonging the service life of the damping device 4.
The second end surface of the case 42 may abut against the inner side wall of the back plate 1. In order to improve the fixing reliability of the case 42, the case 42 may be fixed to the light emitting side wall of the back plate 1 by gluing, bolting, or the like. In an alternative implementation manner, the accommodating groove can be further formed in the position of the light emitting side wall corresponding to the damping device 4, so that the damping device 4 can be located in the corresponding accommodating groove, and the damping device 4 can be better fixed on the light emitting side wall, so that the fixing reliability of the damping device 4 is further improved, and in addition, the gap between the light guide plate 2 and the light bar 3 can be reduced, so that the light inlet amount of the light guide plate 2 is improved.
The motor 43 may be connected to the rotation assembly 44 to drive the rotation assembly 44 to rotate under the control of the controller. The rotational speed of the motor 43 is related to the driving current, and in particular, the controller may adjust the driving current output to the motor 43 to indirectly control the rotational speed of the rotating assembly 44, and the rotating assembly 44 may be stretched in the radial direction by a rotational force (or referred to as centrifugal force), thereby increasing the drainage volume of the rotating assembly 44, and the higher the rotational speed of the rotating assembly 44, the greater the rotational force, and the greater the corresponding stretching amount, and thus the drainage volume of the rotating assembly 44. Since the liquid, for example, water, is sealed in the tank 42, the density, g, and the gravity acceleration of the liquid sealed in the tank 42 are according to the buoyancy formula F Floating device =ρ Liquid and its preparation method gVexhaust,ρ Liquid and its preparation method , and V exhaust is the increase of the drain volume of the rotating assembly 44, it can be known that the increase of the buoyancy of the rotating assembly 44 is equal to the gravity corresponding to the increase of the drain volume of the rotating assembly 44, and the drain volumes corresponding to different rotation speeds of the rotating assembly 44 can be calculated according to an empirical formula or the like, so as to determine the increase of the buoyancy of the rotating assembly 44, and the increase of the buoyancy of the rotating assembly 44 is the damping force provided by the damping device 4 to the light guide plate 2.
To improve the rotational stability of the rotating assembly 44, the central axes of the strut 41, the housing 42, the motor 43 and the rotating assembly 44 may be parallel or even coincident.
Referring to fig. 3A to 3C, a driving groove 441 and a first annular groove 442 located at the periphery of the driving groove 441 may be formed on a first end surface of the rotating assembly 44. The driving shaft of the motor 43 is fixed in the driving groove 441 so that the rotation assembly 44 can be driven to rotate. The specific fixing mode of the driving shaft can be selected according to actual needs, for example, the driving shaft can be fixed in a snap connection mode.
To improve the reliability of the rotating assembly 44, the second end of the strut 41 may extend into the first annular groove 442, and a bearing 45 may be connected between the outer sidewall of the strut 41 and the inner sidewall of the first annular groove 442. The outer ring of the bearing 45 may be secured within the inner sidewall of the first annular recess 442 by a universal connection, such as welding, snap fit connection, or the like, such that the outer ring of the bearing 45 may rotate with the rotating assembly 44. The inner ring of the bearing 45 is connected to the second end of the strut 41, and a gap exists between the inner ring of the bearing 45 and the bottom wall of the first annular groove 442, so that the inner ring of the bearing 45 and the strut 41 can not rotate with the rotating assembly 44, and the stability of the strut 41 can be improved.
In some embodiments, to reduce the rotational resistance, a gap may exist between the strut 41 and both the outer side wall of the driving groove 441 and the bottom wall of the first annular groove 442 to reduce the power consumption of the damping device 4.
The rotating assembly 44 may include a rotating disc 443, elastic members 444, and blades 445. The driving groove 441 and the first annular groove 442 may be provided at a first end surface of the rotary disk 443 such that the rotary disk 443 can be rotated by the motor 43. In order to increase the volume of water discharged as the rotary disk 443 rotates, the second end surface of the rotary disk 443 may be concaved inward to form an inclined surface, thereby increasing the buoyancy force to which the rotary disk 443 is subjected. The side wall of the rotating disc 443 may be recessed inward to form a second annular groove 4431, and referring to fig. 4, a first end of the elastic member 444 may be fixed in the second annular groove 4431 by welding or the like, and a second end of the elastic member 444 may be connected to the blades 445 by a snap connection or the like. The elastic member 444 is capable of expanding and contracting in the radial direction of the rotating disc 443, and in particular, the elastic member 444 may be a spring.
Referring to fig. 3A-3D, when the rotating assembly 44 is in a stationary state, the elastic member 444 is in a natural state, and the blades 445 are retracted within the second annular groove 4431. Referring to fig. 3E to 3G, when the rotating assembly 44 is in the working state, the blades 445 may gradually extend out of the second annular groove 4431 under the action of centrifugal force, the elastic member 444 is in the extended state, the drainage volume of the rotating assembly 44 is increased, the buoyancy is increased, and the extension degree of the blades 445 is positively correlated to the rotation speed of the rotating disc 443 and the drainage volume of the rotating assembly 44.
The blades 445 may be block-shaped blades as shown in fig. 3D, or may be fan-shaped, and the shape of the blades 445 is not particularly limited in the embodiment of the present application.
The elastic member 444 may have a one-to-one correspondence with the blades 445. The number of blades 445 may be plural in order to increase the drainage volume of the rotating assembly 44. As shown in fig. 3D, the number of the blades 445 is 4, and the plurality of blades 445 are circumferentially spaced along the second annular groove 4431, and the number of the elastic members 444 may also include a plurality of elastic members, and the plurality of elastic members may also be circumferentially spaced along the second annular groove 4431. Of course, the plurality of elastic members 444 may correspond to one blade 445, and the correspondence between the elastic members 444 and the blade 445 may be selected according to actual needs.
In consideration of stability of the rotating disc 443 when rotating, distance blocks 446 may be further disposed between the adjacent blades 445, one end of the distance blocks 446 is fixed in the second annular groove 4431, and the other end extends out of the second annular groove 4431 to contact with the inner side wall of the case 42. The distance blocks 446 may be made of metal, and by arranging the distance blocks 446 to contact with the inner side wall of the case 42, the central axis of the rotary disk 443 is always parallel to the central axis of the case 42 when the rotary disk 443 rotates, so as to reduce the shaking degree of the rotary disk 443 when the rotary disk 443 rotates in the cavity of the case 42. In addition, the distance blocks 446 may further increase the drainage volume of the rotating assembly 44, thereby increasing the buoyancy of the liquid to the rotating assembly 44.
It should be noted that, the structure included in the damping device 4 according to the embodiment of the present application is not limited to the above-mentioned device, for example, in an actual product, a reflective film may be further disposed on the first end surface of the strut 41, so as to improve the light utilization rate.
The backlight module according to the present application will be described in detail with reference to the following examples.
The sensor can be an acceleration sensor, and the acceleration sensor can determine the falling height of the backlight module through the weightlessness duration when detecting that the backlight module is in a falling state.
The controller can determine the impact force of the backlight module according to the falling height detected by the acceleration sensor, and adjust the rotation speed of the rotating assembly 44 according to the falling height, so that the blades 445 of the rotating assembly 44 can extend out of the second annular groove 4431 under the action of centrifugal force, so that the buoyancy increment of the rotating assembly 44 is not less than the impact force, and the light guide plate 2 can be buffered, so that the situation that the light guide plate 2 impacts the light bar 3 is reduced. When the acceleration sensor detects that the backlight module is not in the weightless state, the controller can control the rotating assembly 44 to stop rotating, and the elastic piece 444 can pull the blade 445 back into the second annular groove 4431.
The backlight module provided by the embodiment of the application comprises a back plate, a light guide plate, a controller, a damping device and a sensor, wherein the damping device and the sensor are electrically connected with the controller; through with damping device's both ends butt between the inside wall of backplate and the lateral wall of light guide plate, can make damping device can carry out spacingly to the light guide plate like this, detect backlight unit's falling height through the sensor, can make the controller can be according to the size of the damping force that falls highly control damping device produced to can cushion the light guide plate, reduce the light guide plate striking lamp strip and arouse the condition that the lamp pearl damaged. In addition, the damping device provided by the embodiment of the application can be directly assembled in a backboard factory, so that the product yield is improved under the condition of reducing the labor cost.
Based on the same inventive concept, an embodiment of the present application further provides a display device, and fig. 5 is a schematic structural diagram of the display device provided in the embodiment of the present application, as shown in fig. 5, the display device includes a display panel 100 and a backlight module 200 according to any of the foregoing embodiments.
Since the display device in this embodiment includes the backlight module in the foregoing embodiment, that is, the display device in this embodiment has all the technical features and technical effects of the foregoing embodiment of the backlight module, reference is specifically made to the foregoing embodiment, and details thereof will not be described herein.
It should be understood that in the description of the application and the claims that follow, the terms "comprising," "including," "having," and any variations thereof are intended to cover a non-exclusive inclusion, which is meant to be "including but not limited to," unless otherwise specifically emphasized.
In the description of the present application, unless otherwise indicated, "/" means that the objects associated in tandem are in a "or" relationship, e.g., A/B may represent A or B; in the present application, "and/or" describing the association relationship of the association object, it means that there may be three relationships, for example, a and/or B may mean: a alone, a and B together, and B alone, wherein A, B may be singular or plural.
Also, in the description of the present application, unless otherwise indicated, "a plurality" means two or more than two. "at least one of the following" or similar expressions thereof, means any combination of these items, including any combination of single or plural items.
In addition, in the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless specifically stated and limited otherwise, the terms "connected," "coupled," and the like are to be construed broadly and may be, for example, mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, unless otherwise specifically defined, the meaning of the terms in this disclosure is to be understood by those of ordinary skill in the art.
Furthermore, in the description of the present specification and the appended claims, the terms "first," "second," and the like are used to distinguish between similar objects, and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. It is to be understood that the data so used may be interchanged where appropriate, such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein; features defining "first", "second" may include at least one such feature, either explicitly or implicitly.
In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. A backlight module, comprising: the device comprises a back plate, a light guide plate, a controller, a damping device and a sensor, wherein the damping device and the sensor are electrically connected with the controller;
The sensor is used for detecting the falling height of the backlight module, and two ends of the damping device are abutted between the inner side wall of the back plate and the outer side wall of the light guide plate and used for limiting the light guide plate; the damping device comprises a supporting rod, a box body, a motor and a rotating assembly, wherein the motor and the rotating assembly are positioned in the box body, and the inner cavity of the box body is sealed with liquid; the first end of the supporting rod is abutted against the light guide plate, the second end of the supporting rod penetrates through the first end face of the box body to be fixedly connected with the motor, and the second end face of the box body is abutted against the inner side wall of the back plate; the motor is connected with the rotating assembly and used for driving the rotating assembly to rotate under the control of the controller, and the rotating assembly can stretch along the radial direction under the action of the rotating force;
The controller is used for controlling the damping force generated by the damping device according to the falling height, and the damping force is positively correlated with the extension amount of the rotating assembly, the rotating speed of the motor and the falling height.
2. A backlight module according to claim 1, wherein the first ends of the struts are open to form cavities in which the motor is secured.
3. The backlight module according to claim 2, wherein the first end face of the rotating assembly is provided with a driving groove and a first annular groove positioned at the periphery of the driving groove;
the driving shaft of the motor is fixed in the driving groove;
the second end of the supporting rod stretches into the first annular groove, and a bearing is connected between the outer side wall of the supporting rod and the inner side wall of the first annular groove;
The outer ring of the bearing is fixed in the inner side wall of the first annular groove, the inner ring of the bearing is connected with the second end of the supporting rod, and a gap exists between the inner ring of the bearing and the bottom wall of the first annular groove.
4. The backlight module according to claim 1, wherein the rotation assembly comprises a rotation plate, an elastic member and blades,
The side wall of the rotating disc is inwards recessed to form a second annular groove, one end of the elastic piece is fixed in the second annular groove, the other end of the elastic piece is connected with the blades, and when the elastic piece is in a natural state, the blades shrink in the second annular groove; the elastic piece can stretch and retract along the radial direction of the rotating disc;
The first end face of the rotating disc is connected with the motor, and the second end face of the rotating disc is concave inwards to form an inclined plane.
5. The backlight module according to claim 4, wherein the elastic member comprises a plurality of elastic members, and the plurality of elastic members are circumferentially arranged at intervals along the second annular groove; each elastic piece is connected with the blade in a one-to-one correspondence.
6. A backlight module according to claim 5, wherein distance blocks are further arranged between adjacent blades, one ends of the distance blocks are fixed in the second annular groove, and the other ends of the distance blocks extend out of the second annular groove to contact with the inner side wall of the box body.
7. A backlight module according to any one of claims 1 to 6, wherein the damping means comprises a plurality of damping means arranged between the light entrance side wall of the light guide plate and the inner side wall of the back plate at intervals.
8. A backlight module according to claim 7, wherein the damping devices comprise two damping devices, and the two damping devices are separately disposed at two ends of the light incident side wall of the light guide plate.
9. A display device, comprising: a backlight module and a display panel according to any one of claims 1-8, said display panel being located on the light exit side of said backlight module.
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| CN202410327108.5A CN117930546B (en) | 2024-03-21 | 2024-03-21 | Backlight module and display device |
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| CN202410327108.5A CN117930546B (en) | 2024-03-21 | 2024-03-21 | Backlight module and display device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106228094A (en) * | 2016-09-06 | 2016-12-14 | 广东欧珀移动通信有限公司 | Processing method, device and the mobile terminal that mobile terminal falls |
| CN116794761A (en) * | 2023-08-29 | 2023-09-22 | 惠科股份有限公司 | Backlight module and display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765346B (en) * | 2008-12-25 | 2012-06-13 | 深圳富泰宏精密工业有限公司 | Portable type electronic device |
| JP2012146504A (en) * | 2011-01-12 | 2012-08-02 | Jvc Kenwood Corp | Lighting system and image display device |
| CN103310168A (en) * | 2012-03-14 | 2013-09-18 | 联想(北京)有限公司 | Method for preventing equipment from falling and equipment |
| CN210864103U (en) * | 2019-11-22 | 2020-06-26 | 深圳淡色显示科技有限公司 | Limit structure of light guide plate of backlight module |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106228094A (en) * | 2016-09-06 | 2016-12-14 | 广东欧珀移动通信有限公司 | Processing method, device and the mobile terminal that mobile terminal falls |
| CN116794761A (en) * | 2023-08-29 | 2023-09-22 | 惠科股份有限公司 | Backlight module and display device |
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