Bracket, backlight module and display device

Abstract

The present disclosure belongs to the field of display technology, and specifically relates to a bracket, a backlight module and a display device. The bracket includes: a reflective base, a reflective element and a driving element. The top surface of the reflective base is provided with a receiving groove, the reflective element is movably arranged in the receiving groove, and the reflectivity of the reflective element is greater than the reflectivity of the reflective base; the driving element is used to drive the reflective element to move to a first position when the lamp beads in the backlight module are in a bright state, and to drive the reflective element to move to a second position when the lamp beads in the backlight module are in a dark state; wherein, when the reflective element moves to the first position, the top surface of the reflective element is higher than the top surface of the reflective base or flush with the top surface of the reflective base, and when the reflective element moves to the second position, the top surface of the reflective element is lower than the top surface of the reflective base. The present disclosure realizes light compensation for the dark shadow area of ​​the bracket by setting a reflective element, thereby improving the dark shadow problem of the bracket and realizing a light emitting effect of a darker dark state and a brighter bright state of the backlight module.

Description

Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a bracket, a backlight module and a display device. Background Art

[0002] When the backlight module is in working state, the bracket in the backlight module will produce a shadow defect at the positive projection of the optical film, which will lead to poor display effect. Summary of the invention

[0003] The purpose of the present disclosure is to provide a bracket, a backlight module and a display device, by arranging a movable reflector in a receiving groove of a reflective base, so as to improve the shadow problem of the bracket and adjust the reflective ability of the reflector according to the state of the lamp beads to achieve a brighter light state and a brighter dark state.

[0004] The present disclosure provides a bracket for a backlight module, the bracket comprising:

[0005] A reflective base, wherein a receiving groove is provided on the top surface of the reflective base;

[0006] A reflective member, movably disposed in the receiving groove, and having a reflectivity greater than that of the reflective base;

[0007] A driving member, used for driving the reflective member to move to a first position when the lamp beads in the backlight module are in a bright state, and for driving the reflective member to move to a second position when the lamp beads in the backlight module are in a dark state;

[0008] Wherein, when the reflector moves to the first position, the top surface of the reflector is higher than the top surface of the reflective base or is flush with the top surface of the reflective base, and when the reflector moves to the second position, the top surface of the reflector is lower than the top surface of the reflective base.

[0009] In an exemplary embodiment of the present disclosure, the driving member includes:

[0010] A magnetic bearing member, the reflective member being carried on the top surface of the magnetic bearing member;

[0011] A light-sensing element, arranged on the outer side of the reflective base, for detecting the light-emitting state of the lamp beads around the reflective base;

[0012] A magnetoelectric component, at least partly disposed in the receiving groove, and the part of the magnetoelectric component disposed in the receiving groove is located on a side of the magnetic bearing component away from the reflective component, and the magnetoelectric component is connected to the photosensitive component;

[0013] Among them, the magnetic component can generate a first magnetic field when the photosensitive component detects that the lamp bead is in a bright state, and the magnetic supporting component can drive the reflective component to move to the first position under the action of the first magnetic field. The magnetic component can generate a second magnetic field when the photosensitive component detects that the lamp bead is in a dark state, and the magnetic supporting component can drive the reflective component to move to the second position under the action of the second magnetic field.

[0014] In an exemplary embodiment of the present disclosure, the driving member further includes an elastic member, one end of which is connected to the magnetic bearing member, and the other end of which is connected to the bottom of the accommodating groove.

[0015] In an exemplary embodiment of the present disclosure, the photosensitive element is a photoresistor, and the magnetic element includes:

[0016] A fixing member is located in the receiving groove, the fixing member is located on a side of the magnetic bearing member away from the reflective member and is connected to the bottom of the receiving groove,

[0017] A coil is wound on the fixing member, and two ends of the coil respectively penetrate the side wall of the receiving groove and are respectively connected to one of the photoresistors to be connected to the power supply circuit;

[0018] When the lamp bead is in a bright state, the resistance of the photoresistor decreases, and the first current is passed through the coil to form the first magnetic field; when the lamp bead is in a dark state, the resistance of the photoresistor increases, and the second current is passed through the coil to form the second magnetic field, wherein the second current is smaller than the first current.

[0019] In an exemplary embodiment of the present disclosure, the bracket includes a light-transmitting cover, and the light-transmitting cover is arranged on the top surface of the reflective base to cover the receiving groove.

[0020] Wherein, when the reflective element moves to the first position, the top surface of the reflective element contacts the bottom surface of the light-transmitting cover.

[0021] In an exemplary embodiment of the present disclosure, the top surface of the light-transmitting cover is in an arc shape; and / or

[0022] The ratio of the height of the light-transmitting cover to the height of the reflective base is greater than or equal to 1 / 2 and less than or equal to 1.

[0023] In an exemplary embodiment of the present disclosure, the ratio of the area of ​​the top surface of the reflective element to the area of ​​the top surface of the reflective base is at least 1:1; and / or

[0024] The depth of the receiving groove is less than or equal to 1 / 2 of the height of the reflective base; and / or

[0025] The center of the reflective element coincides with the center of the reflective base.

[0026] The present disclosure provides a backlight module, comprising a lamp board and at least one bracket as described in any one of the above, wherein the lamp board is provided with a plurality of lamp beads arranged in an array, and the top surface of the bracket is higher than the top surface of the lamp beads.

[0027] In an exemplary embodiment of the present disclosure, the backlight module includes:

[0028] a back plate, located on a side of the light board away from the bracket, and connected to the light board,

[0029] The optical film is located on a side of the bracket away from the light board and is spaced apart from the top surface of the bracket.

[0030] Among them, the light board is provided with a plurality of through holes passing through the light board, the through holes correspond to the bracket one by one, and the orthographic projection of the bracket on the light board is located in the corresponding through hole, and a buffer is arranged in each of the through holes, one end of the buffer is connected to the bottom surface of the reflective base, and the other end is connected to the back panel.

[0031] The present disclosure provides a display device, comprising a display panel and any one of the backlight modules described above, wherein the display panel is located at the light emitting side of the light board.

[0032] The disclosed solution has the following beneficial effects:

[0033] The present invention provides a receiving groove on the top of the reflective base, and provides a reflective element and a driving element in the receiving groove, and utilizes the characteristic that the reflectivity of the reflective element is greater than the reflectivity of the reflective base, so that the reflective element can reflect light when the lamp bead is in a bright state, and utilizes the reflected light to perform light compensation on the shadow area of ​​the bracket, thereby improving the bracket shadow problem of the backlight module.

[0034] In addition, the driver in the present disclosure can drive the reflector to move between the first position and the second position according to the state of the lamp beads. Specifically, the driver drives the reflector to move to the first position when the lamp beads in the backlight module are in the bright state. At this time, the top surface of the reflector is higher than the top surface of the reflective base or flush with the top surface of the reflective base, thereby enhancing the reflective ability of the reflector to improve the light output brightness of the backlight module in the bright state. The driver can also drive the reflector to move to the second position when the lamp beads in the backlight module are in the dark state. At this time, the top surface of the reflector is lower than the top surface of the reflective base, thereby reducing the reflective ability of the reflector to reduce the light output brightness of the backlight module in the bright state, thereby enabling the backlight module to achieve a brighter light output effect in the bright state and darker light output effect in the dark state.

[0035] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0036] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0038] Figure 1 It is a schematic diagram of the cross-sectional structure of a display device in the related art.

[0039] Figure 2 for Figure 1 Schematic diagram of the local structure of the bracket.

[0040] Figure 3 It is a schematic diagram of a cross-sectional structure of the bracket in the first position in an embodiment of the present disclosure.

[0041] Figure 4 It is a schematic diagram of a cross-sectional structure of the bracket in the second position in an embodiment of the present disclosure.

[0042] Figure 5 The figure is a schematic diagram of the reflection of light by the reflective element when the lamp bead in the embodiment of the present disclosure is in the bright state.

[0043] Figure 6 It is a schematic diagram of the reflection of light by the reflective element when the lamp bead in the embodiment of the present disclosure is in a dark state.

[0044] Figure 7 It is a schematic diagram of the cross-sectional structure of the driving member in the embodiment of the present disclosure.

[0045] Figure 8 Schematic diagram of another cross-sectional structure of the bracket in the first position in the embodiment of the present disclosure.

[0046] Fig. 9 It is another schematic diagram of the cross-sectional structure of the bracket in the second position in the embodiment of the present disclosure.

[0047] Fig.10 It is a schematic diagram of the cross-sectional structure of the backlight module in the embodiment of the present disclosure.

[0048] Fig.11 It is a schematic diagram of the cross-sectional structure of the buffer component in the embodiment of the present disclosure.

[0049] Fig.12 It is a schematic diagram of the cross-sectional structure of the optical film extrusion bracket in the embodiment of the present disclosure.

[0050] Fig.13 for Fig.12 Schematic diagram of a partially enlarged cross-sectional structure.

[0051] Fig.14 Schematic diagram of the cross-sectional structure of the display device in the embodiment of the present disclosure.

[0052] Description of reference numerals:

[0053] 1. Display device;

[0054] 2. Bracket;

[0055] 21. reflective base; 211. receiving slot;

[0056] 22. Reflective parts;

[0057] 23, driving member; 231, magnetic bearing member; 232, photosensitive member; 233, magnetic member; 2331, fixing member; 2332, coil; 234, elastic member;

[0058] 24. Light-transmitting cover;

[0059] 3. lamp board; 31. lamp beads; 32. vias; 33. buffer parts;

[0060] 4. Back panel;

[0061] 5. Optical film;

[0062] 6. Backlight module;

[0063] 7. Display panel. DETAILED DESCRIPTION

[0064] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete and will fully convey the concept of the example embodiments to those skilled in the art.

[0065] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0066] The present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be understood as limiting the present disclosure.

[0067] In recent years, with the popularization and promotion of various MiniLED display devices, such high-end display devices have gradually entered people's daily lives. Their advantages in picture quality: high color gamut, high brightness, high contrast, etc., can bring people a better visual experience. Figure 1 to Figure 2 As shown, currently, the backlight module 6 in the display device 1 is mostly formed of white plastic to form an integral bracket 2 for supporting the optical film 5. Due to the opacity of the bracket 2, the bracket 2 has more or less bracket shadow defects in the positive projection area on the optical film 5, thereby reducing the overall display effect of the display device 1.

[0068] To solve the above problems, Figures 3 to 14 As shown, the present disclosure provides a bracket 2 for a backlight module 6, the bracket 2 comprising: a reflective base 21, a reflective member 22 and a driving member 23. A receiving groove 211 is provided on the top surface of the reflective base 21, the reflective member 22 is movably disposed in the receiving groove 211, and the reflectivity of the reflective member 22 is greater than the reflectivity of the reflective base 21.

[0069] Among them, the depth of the accommodating groove 211 can be less than or equal to 1 / 2 of the height of the reflective base 21, so as to avoid the height of the groove side wall of the accommodating groove 211 occupying too large a proportion of the overall height of the reflective base 21, which in turn leads to the supporting performance of the reflective base 21 being too weak and the bracket 2 being unable to support and protect the lamp beads 31.

[0070] In addition, the present disclosure can also make the ratio of the area of ​​the top surface of the reflective element 22 to the area of ​​the top surface of the reflective base 21 (i.e., the top wall of the accommodating groove 211) be at least 1:1, so as to avoid the top surface area of ​​the reflective element 22 being too small, resulting in the reflective element 22 receiving too little light, and then resulting in the reflective ability of the reflective element 22 being too weak, thereby making it impossible to improve the bracket shadow problem in the backlight module 6.

[0071] For example, the ratio of the area of ​​the top surface of the reflector 22 to the area of ​​the top surface of the reflective base 21 can be 1:1, or 2:1, or 3:1. The present disclosure can control the reflective ability of the reflector 22 to light by controlling the area of ​​the top surface of the reflector 22, and further control the brightness compensated by the reflector 22 for the bracket shadow area in the backlight module 6. When the light output brightness of the backlight module 6 at the bracket shadow area is consistent with the light output brightness at other positions of the backlight module 6, the backlight module 6 can achieve uniform light output brightness.

[0072] In the embodiment of the present disclosure, the reflective member 22 can be made of barium sulfate material, and the reflective base 21 can be made of white plastic material. The reflectivity of the barium sulfate material to light is greater than the reflectivity of the white plastic material to light. However, the present disclosure does not limit the present disclosure. The technical solutions of using materials other than barium sulfate material to make the reflective member 22, using materials other than white plastic material to make the reflective base 21, and the reflectivity of the reflective member 22 can be greater than the reflectivity of the reflective base 21 can all be included in the embodiment of the present disclosure.

[0073] like Figures 3 to 7 As shown, the driving member 23 is used to drive the reflective member 22 to move to the first position when the lamp beads 31 in the backlight module 6 are in the bright state, and is used to drive the reflective member 22 to move to the second position when the lamp beads 31 in the backlight module 6 are in the dark state.

[0074] Among them, Figure 3 , Figure 5 As shown, when the reflector 22 moves to the first position, the top surface of the reflector 22 is higher than the top surface of the reflective base 21 or is flush with the top surface of the reflective base 21, so that the light from the lamp beads 31 and the external environment can be irradiated onto the reflector 22, and reflected by the reflector 22 to the bracket shadow area in the backlight module 6. Since the reflectivity of the reflector 22 is greater than the reflectivity of the reflective base 21, the light reflected by the reflector 22 can perform light compensation on the bracket shadow area in the backlight module 6 to improve the bracket shadow problem of the backlight module 6 and improve the overall light output brightness of the backlight module 6 when in the bright state.

[0075] like Figure 4 , Figure 6As shown, when the reflector 22 moves to the second position, the top surface of the reflector 22 is lower than the top surface of the reflective base 21, and the reflective base 21 (i.e., the side wall of the accommodating groove 211) can partially or completely shield the light generated by the lamp beads 31 and the external environment, thereby reducing or avoiding the light from irradiating the reflector 22, so as to reduce or avoid the reflection of the light by the reflector 22, and further reduce the overall light output brightness of the backlight module 6 in the dark state. That is, the present disclosure can control the reflector 22 to move between the first position and the second position according to the state of the lamp beads 31 around the bracket 2, so as to achieve a light output effect of the backlight module 6 that is brighter in the bright state and darker in the dark state.

[0076] It should be noted that the bright state mentioned above refers to the state when the lamp bead 31 emits light, and the dark state refers to the state when the lamp bead 31 does not emit light.

[0077] Further, such as Figure 7 As shown, the driving member 23 in the embodiment of the present disclosure may include: a magnetic bearing member 231 , a photosensitive member 232 and a magnetic generating member 233 . The magnetic bearing member 231 is located in the receiving groove 211 , and the top surface of the magnetic bearing member 231 carries the reflective member 22 .

[0078] It should be noted that the top surface of the magnetic bearing member 231 refers to a surface of the magnetic bearing member 231 that is away from the bottom of the receiving groove 211 .

[0079] Since the shadow is relatively concentrated at the center directly above the bracket 2, in the disclosed embodiment, the center of the reflector 22 can be made to coincide with the center of the reflective base 21, so that the reflector 22 can evenly fill in the shadow of the bracket, thereby improving the uniformity of the brightness of the light output by the backlight module 6.

[0080] It should also be noted that the reflector 22 in the present disclosure can be a reflective film coated on the top surface of the magnetic carrier 231, or a reflective structure layer placed on the magnetic carrier 231 and having a certain thickness, so that when the reflector 22 moves to the first position and the top surface of the reflector 22 is higher than the top surface of the reflective base 21, the side surface of the reflector 22 can also reflect the light, thereby increasing the reflective ability of the reflector 22, so as to improve the bracket shadow problem of the backlight module 6 while also improving the light output brightness of the backlight module 6. Among them, the reflector 22 can completely cover the top surface of the magnetic carrier 231, or partially cover the surface of the magnetic carrier 231, which can be determined according to actual conditions.

[0081] The photosensitive member 232 is disposed outside the reflective base 21 to detect the light-emitting state of the lamp beads 31 around the reflective base 21. The magnetic member 233 is at least partially disposed in the receiving groove 211, and the portion of the magnetic member 233 disposed in the receiving groove 211 is located on the side of the magnetic bearing member 231 away from the reflective member 22.

[0082] The magnetic component 233 is connected to the photosensitive component 232, wherein the magnetic component 233 can generate a first magnetic field when the photosensitive component 232 detects that the lamp bead 31 is in a bright state, and the magnetic supporting component 231 can drive the reflective component 22 to move to the first position under the action of the first magnetic field. The magnetic component 233 can generate a second magnetic field when the photosensitive component 232 detects that the lamp bead 31 is in a dark state, and the magnetic supporting component 231 can drive the reflective component 22 to move to the second position under the action of the second magnetic field.

[0083] In the embodiment of the present disclosure, the magnetism of the first magnetic field may be the same as the magnetism of the second magnetic field, but is not limited thereto. The magnetism of the first magnetic field may also be opposite to the magnetism of the second magnetic field, which may be determined according to actual conditions.

[0084] For example, in one embodiment of the present disclosure, in the initial state, the top surface of the reflector 22 is lower than the top surface of the reflective base 21. At this time, the magnetism of the first magnetic field formed by the magnetizing member 233 is the same as the magnetism of the magnetic bearing member 231, and the first magnetic field is greater than 0, so that the magnetic bearing member 231 can rise to the first position under the action of the first magnetic field, so that more light is irradiated onto the reflector 22 and reflected by the reflector 22, so as to improve the light output brightness of the backlight module 6 in the bright state. In the embodiment of the present disclosure, the second magnetic field can be greater than 0, and the second magnetic field can also be equal to 0. Among them, when the magnetism of the second magnetic field is the same as the magnetism of the magnetic bearing member 231, the second magnetic field should be smaller than the first magnetic field, so that the repulsive force between the magnetizing member 233 and the magnetic bearing member 231 can be reduced, and then the magnetic bearing member 231 can drive the reflector 22 to drop to the second position to reduce or avoid light irradiation onto the reflector 22, and then the light output brightness of the backlight module 6 in the dark state can be reduced. When the magnetism of the second magnetic field is opposite to the magnetism of the magnetic carrier 231, the second magnetic field can be greater than the first magnetic field, or the second magnetic field can be smaller than the first magnetic field. As long as the magnetic carrier 231 can drive the reflector 22 to move downward under the action of the second magnetic field and make the top surface of the reflector 22 lower than the top surface of the reflective base 21, it can be included in the embodiments of the present disclosure.

[0085] In another embodiment of the present disclosure, in the initial state, the top surface of the reflective member 22 is higher than the top surface of the reflective base 21 or is flush with the top surface of the reflective base 21. At this time, the magnetism of the second magnetic field formed by the magnetizing member 233 is opposite to the magnetism of the magnetic carrier 231, and the second magnetic field is greater than 0, so that the magnetic carrier 231 can drop to the second position under the action of the second magnetic field, so as to use the side wall of the reflective base 21 to reduce or avoid light from irradiating onto the reflective member 22, thereby reducing the light output brightness of the backlight module 6 in the dark state. In the embodiment of the present disclosure, the first magnetic field can be greater than 0, and the first magnetic field can also be equal to 0. Among them, when the magnetism of the first magnetic field is opposite to the magnetism of the magnetic carrier 231, the first magnetic field should be smaller than the second magnetic field, so as to reduce the attraction between the magnetized part 233 and the magnetic carrier 231, and then the top surface of the reflector 22 can be higher than the top surface of the reflective base 21 or flush with the top surface of the reflective base 21, so that more light can be irradiated onto the reflector 22 and reflected by the reflector 22 to improve the light output brightness of the backlight module 6 in the bright state. When the magnetism of the first magnetic field is the same as the magnetism of the magnetic carrier 231, the first magnetic field can be greater than the second magnetic field, or the first magnetic field can be smaller than the second magnetic field. As long as the magnetic carrier 231 can drive the reflector 22 to move upward under the action of the first magnetic field, and make the top surface of the reflector 22 higher than the top surface of the reflective base 21 or flush with the top surface of the reflective base 21, it can be included in the embodiments of the present disclosure.

[0086] Furthermore, the magnetic component 233 in the embodiment of the present disclosure may include: a fixing component 2331 and a coil 2332, the fixing component 2331 is arranged in the receiving groove 211, and the fixing component 2331 is located on the side of the magnetic supporting component 231 away from the reflective component 22, and the end of the fixing component 2331 away from the magnetic supporting component 231 is fixedly connected to the bottom of the receiving groove 211.

[0087] The coil 2332 is wound around the fixing member 2331. Specifically, the coil 2332 can be wound around one end of the fixing member 2331 close to the magnetic bearing member 2331. The coil 2332 can form a magnetic field below the magnetic bearing member 231 to control the reflector 22 to move between the first position and the second position. The two ends of the coil 2332 respectively penetrate the side walls of the receiving groove 211 and are respectively connected to a photosensitive member 232, so that the coil 2332 can adjust the intensity of the generated magnetic field according to the state of the lamp beads 31 around the bracket 2 detected by the photosensitive member 232. When the lamp beads 31 are in the bright state, the magnetic field is controlled to drive the reflector 22 to move to the first position to increase the light irradiated to the reflector 22, and when the lamp beads 31 are in the dark state, the magnetic field is controlled to drive the reflector 22 to move to the second position to reduce the light irradiated to the reflector 22, thereby enabling the backlight module 6 to achieve a brighter light output effect in the bright state and darker light output effect in the dark state.

[0088] It should be noted that the present invention can open a through hole on the side wall of the accommodating groove 211, so that the coil 2332 located in the accommodating groove 211 can be connected to the coil 2332 located outside the accommodating groove 211 through the through hole, and the diameter of the through hole can be the same as the diameter of the coil 2332, so that the through hole can be sealed by the coil 2332, thereby preventing light from passing through the through hole to irradiate the reflective element 22 in the dark state, and the reflected light of the reflective element 22 is emitted through the through hole, thereby causing the backlight module 6 to be locally bright in the dark state.

[0089] However, it is not limited to this. The present disclosure can also allow the coil 2332 in the accommodating groove 211 and the coil 2332 outside the accommodating groove 211 to extend to the top surface of the reflective base 21, so that the two parts of the coil 2332 are connected on the top surface of the reflective base 21, thereby reducing the process of setting a through hole on the reflective base 21, simplifying the manufacturing process of the bracket 2, and reducing the risk of damage to the bracket 2.

[0090] The fixing part 2331 can be made of materials such as pure iron, silicon steel, Permalloy, manganese-zinc ferrite and zinc-preserving ferrite, but is not limited thereto. Solutions of using other materials with the characteristics of easy magnetization and demagnetization to make the fixing part 2331 can also be included in the embodiments of the present disclosure.

[0091] In the disclosed embodiment, the photosensitive element 232 may be a photoresistor, and the resistance of the photoresistor is negatively correlated with the brightness of the lamp bead 31 sensed by it. Therefore, the resistance of the photoresistor when the lamp bead 31 is in a bright state is smaller than the resistance of the photoresistor when the lamp bead 31 is in a dark state.

[0092] The coil 2332 is connected to the power supply circuit. When the lamp bead 31 is in the bright state, the photoresistor senses the light of the lamp bead 31, the resistance of the photoresistor is small, the first current is passed through the coil 2332, and a first magnetic field is formed; when the lamp bead 31 is in the dark state, the photoresistor does not sense the light or the sensed light intensity is weak (the light sensed by the photoresistor here can be light from the external environment), the resistance of the photoresistor is large, the second current is passed through the coil 2332, and a second magnetic field is formed, wherein the second current is less than the first current, and the second current can be equal to 0.

[0093] One or more photosensitive members 232 may be disposed on the outside of the reflective base 21 . The multiple photosensitive members 232 may be evenly arranged on the outside of the reflective base 21 to obtain the states of the lamp beads 31 at different positions on the outside of the bracket 2 .

[0094] For example, a photosensitive member 232 may be disposed on two opposite sides of the reflective base 21 , and the photosensitive member 232 may be connected to the coil 2332 to obtain the states of the lamp beads 31 on both sides of the reflective base 21 .

[0095] It should be noted that in the embodiment of the present disclosure, a power supply circuit can be opened separately for the coil 2332, but it is not limited to this. The present disclosure can also directly connect the coil 2332 to the circuit in the backlight module 6 that powers the lamp beads 31 to reduce the circuit settings, thereby reducing the production cost of the bracket 2.

[0096] In addition, the driving member 23 in the embodiment of the present disclosure may further include an elastic member 234, one end of the elastic member 234 is connected to the magnetic supporting member 231, and the other end is connected to the bottom of the accommodating groove 211, the elastic member 234 forms an elastic support for the magnetic supporting member 231, and the elastic member 234 can elastically expand and contract as the magnetic supporting member 231 moves up and down, so that the magnetic supporting member 231 can be maintained above the coil 2332, and can drive the reflective member 22 to move between the first position and the second position under the action of the magnetic field generated by the coil 2332.

[0097] The elastic member 234 may be made of a spring, but is not limited thereto. The elastic member 234 may also be composed of a cylinder or other structures that can move along the moving direction of the magnetic bearing member 231 .

[0098] like Figures 8 to 9 As shown, in the embodiment of the present disclosure, the bracket 2 may also include a light-transmitting cover 24, which is arranged on the top surface of the reflective base 21 to cover the accommodating groove 21, wherein when the reflective element 22 moves to the first position, the top surface of the reflective element 22 is in contact with the bottom surface of the light-transmitting cover 24, and when light passes through the light-transmitting cover 24 and irradiates the reflective element 22, the light reflected by the reflective element 22 is emitted through the light-transmitting cover 24, thereby achieving diffusion of light, avoiding excessive concentration of light emitted by the reflective element 22, causing a local area of ​​the backlight module 6 to be brighter, and then causing a light spot problem in the backlight module 6.

[0099] The light-transmitting cover 24 and the reflective base 21 can be fixedly connected by adhesive, for example, double-sided adhesive can be used to bond the light-transmitting cover 24 and the reflective base 21. However, the present invention is not limited thereto, and other methods other than bonding by adhesive to fix the light-transmitting cover 24 and the reflective base 21 can be included in the embodiments of the present disclosure.

[0100] It should be noted that the degree of improvement in the brightness of the bracket shadow area of ​​the backlight module 6 by the reflected light of the reflector 22 is related to the distance between the top surface of the reflector 22 and the bracket shadow area of ​​the backlight module 6: when the distance between the top surface of the reflector 22 and the bracket shadow area of ​​the backlight module 6 is too short, the reflected light is too strong, which will cause light spots to appear in the bracket shadow area; when the distance between the top surface of the reflector 22 and the bracket shadow area of ​​the backlight module 6 is too long, the reflected light of the reflector 22 will have a large loss in the path of being emitted to the bracket shadow area, which will lead to less light reflected to the bracket shadow area, thereby failing to improve the bracket shadow problem of the backlight module 6 or having a poor improvement effect.

[0101] In order to avoid the above problems, the embodiment of the present disclosure can control the distance between the top surface of the reflector 22 and the bracket shadow area of ​​the backlight module 6 by limiting the height of the light-transmitting cover 24. Since the top surface of the reflector 22 contacts the bottom surface of the light-transmitting cover 24 when the reflector 22 moves to the first position, the present disclosure makes the ratio of the height of the light-transmitting cover 24 to the height of the reflective base 21 greater than or equal to 1 / 2 and less than or equal to 1, so as to improve the problem of large loss of light reflected by the reflector 22 in the emission path due to the long distance between the top surface of the reflector 22 and the bracket shadow area of ​​the backlight module 6, and improve the bracket shadow problem of the backlight module 6, and can also improve the problem of excessive intensity of reflected light from the reflector 22 and the appearance of light spots in the bracket shadow area due to the short distance between the top surface of the reflector 22 and the area of ​​the backlight module 6 where the bracket shadow is generated.

[0102] It should be noted that the light-transmitting cover 24 can be made of transparent plastic, but is not limited to this. The light-transmitting cover 24 can be made of other materials with good light transmittance and light diffusion properties so that light can pass through the light-transmitting cover 24 and shine on the reflective element 22. The solutions that can diffuse the light reflected by the reflective element 22 can all be included in the embodiments of the present disclosure.

[0103] Furthermore, the top surface of the transparent cover 24 in the present disclosure may be arc-shaped to improve the uniformity of diffusion of the reflected light of the reflector 22. However, it is not limited thereto, and other shapes of the transparent cover 24 that can improve the uniformity of light diffusion can be included in the embodiments of the present disclosure.

[0104] In the embodiment of the present disclosure, in order to improve the efficiency of light dispersion of the light-transmitting cover 24, the light-transmitting cover 24 can be set as a solid cover. When the reflector 22 moves to the first position, the top surface of the reflector 22 is in direct contact with the bottom surface of the light-transmitting cover 24, so that the reflected light of the reflector 22 can be directly emitted through the light-transmitting cover 24, avoiding the problem that the reflected light of the reflector 22 is partially lost in the air when there is air between the top surface of the reflector 22 and the bottom surface of the light-transmitting cover 24, thereby improving the light emission rate, and thus improving the light output brightness of the backlight module 6. However, it is not limited to this, and the present disclosure can also set the light-transmitting cover 24 as a cover with a hollow interior.

[0105] For example, when the top surface of the light-transmitting cover 24 is in an arc shape, and the light-transmitting cover 24 is set as a solid hemispherical cover, the reflector 22 is moved to the first position, at which time, the top surface of the reflector 22 is flush with the top surface of the reflective base 21. When the top surface of the light-transmitting cover 24 is in an arc shape, and the light-transmitting cover 24 is set as a hemispherical cover with a hollow interior, the reflector 22 is moved to the first position, at which time, the top surface of the reflector 22 can be flush with the top surface of the reflective base 21, or can be higher than the top surface of the reflective base 21.

[0106] like Fig.10 As shown, an embodiment of the present disclosure provides a backlight module 6, which includes a lamp board 3 and at least one bracket 2 as any one of the above-mentioned ones, the lamp board 3 is provided with a plurality of lamp beads 31 arranged in an array, the bracket 2 and the lamp beads 31 are located on the same side of the light board 3, the bracket 2 is located on the outside of the lamp beads 31, and the top surface of the bracket 2 is higher than the top surface of the lamp beads 31.

[0107] Specifically, the bracket 2 may be disposed between two adjacent lamp beads 31 , but is not limited thereto. The bracket 2 may also be disposed at the edge of the lamp board 3 to support and protect the lamp beads 31 .

[0108] Furthermore, the backlight module 6 may also include a back panel 4 and an optical film 5, wherein the back panel 4 is located on the side of the light board 3 away from the bracket 2 and is connected to the light board 3, and the optical film 5 is located on the side of the bracket 2 away from the light board 3 and is spaced apart from the top surface of the bracket 2.

[0109] In the initial state, the bracket 2 and the optical film 5 are spaced apart, and the distance between the top surface of the bracket 2 and the optical film 5 is between 2mm and 3mm, so as to reduce the damage of the optical film 5 and the bracket 2 caused by the mutual abutment between the bracket 2 and the optical film 5, thereby extending the service life of the optical film 5 and the bracket 2.

[0110] like Fig.11 As shown, a plurality of through holes 32 penetrating the light board 3 may be provided on the light board 3 , the through holes 32 correspond to the brackets 2 one by one, and the orthographic projection of the bracket 2 on the light board 3 is located in the corresponding through holes 32 .

[0111] A buffer 33 is disposed in each through hole 32, and one end of the buffer 33 facing away from the back plate 4 is connected to the bottom surface of the reflective base 21, and the other end is connected to the back plate 4. However, the present invention is not limited thereto, and the through hole 32 may not penetrate the light board 3, that is, the depth of the through hole 32 may be less than the thickness of the light board 3. In this case, the end of the buffer 33 facing away from the reflective base 21 is directly connected to the light board 3.

[0112] It should be understood that when the optical film 5 is squeezed by an external force and collapses, the optical film 5 may squeeze the bracket 2. For details, please refer to Figure 12 to Figure 13 As shown, the present invention opens a through hole 32 on the lamp board 3 and disposes a buffer member 33 in the through hole 32, so that the buffer member 33 can shrink when the bracket 2 is squeezed by the optical film 5, and drive the bracket 2 to move into the through hole 32, so as to reduce the impact force between the optical film 5 and the bracket 2, reduce the damage of the optical film 5 and the bracket 2 caused by the mutual contact between the bracket 2 and the optical film 5, and then extend the service life of the optical film 5 and the bracket 2.

[0113] like Fig.14 As shown, the embodiment of the present disclosure further provides a display device 1, which includes a display panel 7 and any backlight module 6 as described above, and the display panel 7 is located on the light emitting side of the light board 3. Specifically, the display panel 7 can be located on the side of the optical film 5 away from the bracket 2, and the display panel 7 obtains light from the backlight module 6 to realize the display function.

[0114] It should be noted that the display device 1 in the embodiment of the present disclosure may be a MiniLED display device, but is not limited thereto. Other display devices besides the MiniLED display device may also be included in the embodiment of the present disclosure.

[0115] In the description of this specification, the description with reference to the terms "one embodiment", "another embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0116] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and cannot be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present disclosure. Therefore, any changes or modifications made in accordance with the claims and specification of the present disclosure shall fall within the scope covered by the patent of the present disclosure.

Claims

1. A bracket for a backlight module, characterized in that: The support comprises: A reflective base, wherein a receiving groove is provided on the top surface of the reflective base; A reflective member, movably disposed in the receiving groove, and having a reflectivity greater than that of the reflective base; A driving member, used for driving the reflective member to move to a first position when the lamp beads in the backlight module are in a bright state, and for driving the reflective member to move to a second position when the lamp beads in the backlight module are in a dark state; Wherein, when the reflector moves to the first position, the top surface of the reflector is higher than the top surface of the reflective base or is flush with the top surface of the reflective base, and when the reflector moves to the second position, the top surface of the reflector is lower than the top surface of the reflective base.

2. The bracket according to claim 1, characterized in that: The driving member comprises: A magnetic bearing member, the reflective member being carried on the top surface of the magnetic bearing member; A light-sensing element, arranged on the outer side of the reflective base, for detecting the light-emitting state of the lamp beads around the reflective base; A magnetoelectric component, at least partly disposed in the receiving groove, and the part of the magnetoelectric component disposed in the receiving groove is located on a side of the magnetic bearing component away from the reflective component, and the magnetoelectric component is connected to the photosensitive component; Among them, the magnetic component can generate a first magnetic field when the photosensitive component detects that the lamp bead is in a bright state, and the magnetic supporting component can drive the reflective component to move to the first position under the action of the first magnetic field. The magnetic component can generate a second magnetic field when the photosensitive component detects that the lamp bead is in a dark state, and the magnetic supporting component can drive the reflective component to move to the second position under the action of the second magnetic field.

3. The bracket according to claim 2, characterized in that: The driving member also includes an elastic member, one end of which is connected to the magnetic bearing member, and the other end of which is connected to the bottom of the accommodating groove.

4. The bracket according to claim 2, characterized in that: The photosensitive element is a photoresistor, and the magnetic element includes: A fixing member is located in the receiving groove, the fixing member is located on a side of the magnetic bearing member away from the reflective member and is connected to the bottom of the receiving groove, A coil is wound on the fixing member, and two ends of the coil respectively penetrate the side wall of the receiving groove and are respectively connected to one of the photoresistors to be connected to the power supply circuit; When the lamp bead is in a bright state, the resistance of the photoresistor decreases, and the first current is passed through the coil to form the first magnetic field; when the lamp bead is in a dark state, the resistance of the photoresistor increases, and the second current is passed through the coil to form the second magnetic field, wherein the second current is smaller than the first current.

5. The bracket according to claim 1, characterized in that: The bracket includes a light-transmitting cover, which is arranged on the top surface of the reflective base to cover the receiving groove. Wherein, when the reflective element moves to the first position, the top surface of the reflective element contacts the bottom surface of the light-transmitting cover.

6. The bracket according to claim 5, characterized in that: The top surface of the light-transmitting cover is in an arc shape; and / or The ratio of the height of the light-transmitting cover to the height of the reflective base is greater than or equal to 1 / 2 and less than or equal to 1.

7. The bracket according to claim 1, characterized in that: The ratio of the area of ​​the top surface of the reflective element to the area of ​​the top surface of the reflective base is at least 1:1; and / or The depth of the receiving groove is less than or equal to 1 / 2 of the height of the reflective base; and / or The center of the reflective element coincides with the center of the reflective base.

8. A backlight module, characterized in that: It comprises a lamp board and at least one bracket as claimed in any one of claims 1 to 7, wherein the lamp board is provided with a plurality of lamp beads arranged in an array, and the top surface of the bracket is higher than the top surface of the lamp beads.

9. The backlight module according to claim 8, characterized in that: The backlight module comprises: a back plate, located on a side of the light board away from the bracket, and connected to the light board, The optical film is located on a side of the bracket away from the light board and is spaced apart from the top surface of the bracket. Among them, the light board is provided with a plurality of through holes passing through the light board, the through holes correspond to the bracket one by one, and the orthographic projection of the bracket on the light board is located in the corresponding through hole, and a buffer is arranged in each of the through holes, one end of the buffer is connected to the bottom surface of the reflective base, and the other end is connected to the back panel.

10. A display device, characterized in that: It comprises a display panel and any backlight module as claimed in claims 8 to 9, wherein the display panel is located on the light emitting side of the light board.

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