CN115343883A

CN115343883A - Backlight module and display device

Info

Publication number: CN115343883A
Application number: CN202210780521.8A
Authority: CN
Inventors: 龚荣; 何海龙; 康报虹
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-11-15

Abstract

The application discloses a backlight module and a display device, wherein the backlight module comprises a back plate, a diffusion plate, a support frame and a debugging knob; the back plate is provided with a mounting hole; the diffusion plates are arranged at one side of the back plate at intervals; the support frame comprises an adjusting rod and a gear rod, wherein the first end of the adjusting rod is connected with the diffusion plate, and the second end of the adjusting rod is fixedly connected with the gear rod; the outer peripheral surface of the gear lever is provided with a plurality of bulges arranged at intervals along the length direction of the gear lever, and the part of the gear lever, which is positioned between two adjacent bulges, is penetrated and limited in the mounting hole by the two adjacent bulges; the length of the part, located between two adjacent protrusions, of the gear lever is larger than that of the mounting hole; the debugging knob is respectively connected with the back plate and the gear lever; the gear lever can be driven to move along the length direction of the gear lever through the rotation of the debugging knob. Through the setting, the light mixing distance between the diffusion plate and the back plate is adjusted by the support frame, the problem that the support frame can only limit the diffusion plate to be concave in one direction in the prior art is solved, and the accurate debugging of the light mixing distance is realized.

Description

Backlight module and display device

Technical Field

The application relates to the technical field of display, in particular to a backlight module and a display device.

Background

The direct type backlight module generally comprises a back plate, a reflector plate, an LED unit, a diffusion plate, a brightness enhancement film, a diffusion plate support frame, a frame and the like, wherein the diffusion plate is supported by the diffusion plate support frame after the backlight module is assembled so as to prevent the diffusion plate from sinking to influence the light mixing distance between the LED unit and the diffusion plate, and the light mixing distance is related to the picture quality and the uniformity of the brightness of the display device.

In the prior art, most of the space between the diffusion plate support and the diffusion plate is limited in one direction and is sunken, so that the situation that when the display device is actually used, local protrusions of the diffusion plate and local depressions caused by uneven deformation of the back plate under the action of gravity cannot be prevented, and the ideal light mixing distance is changed due to the local protrusions and depressions, thereby affecting the display performance of the display device.

Disclosure of Invention

The application mainly provides a backlight unit and display device to only can one-way restriction sunken problem between the diffuser plate support frame of backlight unit and the diffuser plate among the solution prior art, realize mixing the accurate debugging of light distance.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a backlight module, including:

a back plate having a mounting hole;

the diffusion plates are arranged on one side of the back plate at intervals;

the support frame comprises an adjusting rod and a gear rod; the first end of the adjusting rod is connected with the diffusion plate, and the second end of the adjusting rod is fixedly connected with the gear lever; the outer peripheral surface of the gear lever is provided with a plurality of bulges which are arranged at intervals along the length direction of the gear lever, and the part of the gear lever, which is positioned between two adjacent bulges, is penetrated and limited in the mounting hole by the two adjacent bulges;

the length of the part, located between two adjacent bulges, of the gear lever is larger than that of the mounting hole, and the back board is clamped between different bulges of the gear lever by shifting the gear lever, so that the coarse adjustment of the support frame along the length direction of the gear lever is realized; the backlight module further comprises:

the debugging knob is respectively connected with the back plate and the gear lever; the debugging knob is rotated to drive the gear lever to move along the length direction of the gear lever, so that the support frame is finely adjusted along the length direction of the gear lever.

In one embodiment, the backlight module further includes:

the debugging frame is fixedly arranged on one side of the back plate far away from the diffusion plate;

the debugging knob is respectively connected with the debugging frame or the gear lever in a rotating mode through threads; the gear lever can be driven to move along the length direction of the gear lever through the rotation of the debugging knob relative to the debugging frame or the gear lever.

In one embodiment, the debugging frame is provided with a first screw hole, the debugging knob is in threaded rotary connection with the debugging frame through the first screw hole, and the debugging knob penetrates through the first screw hole and is connected with the gear lever; the debugging knob rotates in the first screw hole to move in the length direction of the debugging knob relative to the debugging frame, so that the gear lever can be driven to move along the length direction of the gear lever; or

The end face of the gear lever, which is far away from one end of the adjusting lever, is provided with a second screw hole, the debugging frame is provided with a first through hole, and the debugging knob penetrates through the first through hole and is in threaded rotary connection with the second screw hole; the debugging knob rotates in the first through hole and is static relative to the debugging frame in the length direction of the debugging knob, and the gear lever can move along the length direction of the gear lever through the rotation of the debugging knob relative to the gear lever.

In one embodiment, the debugging frame is provided with a first screw hole, the debugging knob is in threaded rotary connection with the debugging frame through the first screw hole, and the debugging knob penetrates through the first screw hole and is connected with the gear lever; the gear lever is fixedly connected with the debugging knob; the debugging knob rotates in the first screw hole and moves relative to the debugging frame in the length direction of the debugging knob, so that the gear lever and the debugging knob can be driven to synchronously rotate and move along the length direction of the gear lever; or

The debugging frame is provided with a first screw hole, the debugging knob is in threaded rotary connection with the debugging frame through the first screw hole, and the debugging knob penetrates through the first screw hole and is connected with the gear lever; the gear lever is rotatably sleeved with the debugging knob; the debugging knob rotates in the first screw hole and moves relative to the debugging frame in the length direction of the debugging knob, so that the debugging knob can rotate relative to the gear lever and drive the gear lever to move along the length direction of the gear lever.

In one embodiment, one of the shift levers is coaxially disposed with the adjusting lever and is integrally formed; or

The support frame still includes the backup pad, and is a plurality of gear pole parallel interval sets up and passes through the backup pad with adjust the second end fixed connection of pole.

In an embodiment, the supporting frame further includes a fixing plate, the fixing plate is located on one side of the back plate close to the diffusion plate and is fixedly connected to the shift lever; the debugging knob is rotatably connected with the fixing plate through threads, and one end of the debugging knob is abutted against the back plate; the debugging knob rotates relative to the fixing plate and can drive the gear lever to move along the length direction of the gear lever through the fixing plate.

In one embodiment, the protrusions are protruding rings arranged along the circumferential direction of the gear lever, the number of the protruding rings is N, and the N protruding rings are arranged at equal intervals along the length direction of the gear lever; the convex ring divides the light mixing distance between the back plate and the diffusion plate into (N-1) gears, and the height difference between every two adjacent gears is equal;

the height difference between adjacent gears of the light mixing distance is the distance between the centers of two adjacent convex rings; the distance between the centers of two adjacent convex rings is 3mm-8mm.

In one embodiment, the first end of the adjustment rod is connected to the diffuser plate by a snap fit.

In one embodiment, the backlight module comprises a plurality of support frames, and the plurality of support frames are uniformly distributed in an array structure; or

The distribution density of the plurality of the supporting frames corresponding to the central area of the diffusion plate is greater than that of the supporting frames corresponding to the peripheral area of the diffusion plate.

In order to solve the technical problem, the other technical scheme adopted by the application is as follows: provided is a display device including: a display panel; the backlight module is used for providing backlight for the display panel; the backlight module is any one of the backlight modules described above.

The beneficial effect of this application is: different from the prior art, the application discloses a backlight module and a display device, wherein the backlight module comprises a back plate, a diffusion plate and a support frame; the back plate is provided with a mounting hole; the diffusion plates are arranged at one side of the back plate at intervals; the support frame comprises an adjusting rod and a gear rod, wherein the first end of the adjusting rod is connected with the diffusion plate, and the second end of the adjusting rod is fixedly connected with the gear rod; the outer peripheral surface of the gear lever is provided with a plurality of bulges which are arranged at intervals along the length direction of the gear lever, and the part of the gear lever, which is positioned between two adjacent bulges, is penetrated and limited in the mounting hole by the two adjacent bulges; the length of the part, located between two adjacent protrusions, of the gear lever is larger than that of the mounting hole; the backlight module also comprises a debugging knob, and the debugging knob is respectively connected with the back plate and the gear lever; the gear rod can be driven to move along the length direction of the gear rod through the rotation of the debugging knob. Through the aforesaid setting, through stirring the gear pole so that the different archs of gear pole are located to the back board card, realize the coarse tuning of the length direction of gear pole along the support frame, can drive the gear pole through the rotation of debugging knob and remove along the length direction of gear pole, realize the fine tuning of the length direction of gear pole along the support frame, the cooperation of coarse tuning and fine tuning, can adjust the mixed light distance between diffuser plate and the backplate through this support frame better, thereby realize the accurate debugging of mixed light distance, the support frame has been solved among the prior art and only can one-way restriction diffuser plate sunken problem.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:

fig. 1 is a schematic structural diagram of a display device according to a first embodiment of the present application;

FIG. 2 is a schematic diagram of a partial structure of a backlight module in the prior art;

FIG. 3 is a schematic diagram of a partial structure of a backlight module in an upright state in the prior art;

FIG. 4 is a schematic view of a partial structure of a backlight module of the display device shown in FIG. 1;

FIG. 5 is an enlarged partial cross-sectional view of a region C of the backlight assembly provided in FIG. 4;

FIG. 6 is a schematic structural diagram of one embodiment of a supporting frame of the backlight module shown in FIG. 4;

FIG. 7 is a schematic structural diagram of another embodiment of a supporting frame of the backlight module shown in FIG. 4;

FIG. 8 is a partial enlarged cross-sectional view of the supporting frame and the back plate of the backlight module provided in FIG. 4;

FIG. 9 is a cross-sectional view of a region D of one embodiment of the backlight module shown in FIG. 4;

FIG. 10 is a cross-sectional view of a region D of another embodiment of the backlight module shown in FIG. 4;

FIG. 11 is a cross-sectional view of a region D of another embodiment of the backlight module provided in FIG. 4;

FIG. 12 is a schematic view of a distribution structure of one embodiment of a supporting frame of the backlight module shown in FIG. 4;

FIG. 13 is a schematic view of a distribution structure of another embodiment of the supporting frame of the backlight module shown in FIG. 4;

FIG. 14 is a schematic view of a distribution structure of another embodiment of the supporting frame of the backlight module shown in FIG. 4;

fig. 15 is a partial cross-sectional view of a backlight module according to a second embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device according to a first embodiment of the present disclosure.

The present application provides a display device 300, which can be used for image display, the display device 300 includes a display panel 200 and a backlight module 100, and the backlight module 100 is used for providing backlight for the display panel 200. The display panel 200 may be a liquid crystal display panel 200, and the display panel 200 itself does not emit light, and needs to rely on a light source provided by the backlight module 100 to realize an image display function.

The display panel 200 is a transmissive display panel 200, which can modulate the transmittance of light, but does not emit light by itself. The display panel 200 may be a liquid crystal display panel 200, and has a plurality of pixel units arranged in an array, where each pixel unit can independently control the transmittance and color of light incident to the pixel unit from the backlight module 100, so that the light transmitted by all the pixel units forms a displayed image.

The display panel 200 is located at the light emitting side of the backlight module 100, the shape and size of the display panel 200 are generally matched with those of the backlight module 100, and the display panel 200 may be rectangular or may be in any other shape. The backlight module 100 is usually located at the bottom of the display device 300, and when the backlight module 100 is applied to the field of televisions or mobile terminals, the backlight module 100 is usually rectangular.

The backlight module 100 in this embodiment adopts the direct-type backlight module 100 for emitting light uniformly in the whole light-emitting surface, so as to provide light with sufficient brightness and uniform distribution for the display panel 200, so that the display panel 200 can normally display images.

Referring to fig. 2 to 4, fig. 2 is a partial structure schematic diagram of a backlight module in the prior art, fig. 3 is a partial structure schematic diagram of a backlight module in an upright state in the prior art, and fig. 4 is a partial structure schematic diagram of a backlight module of the display device provided in fig. 1 of the present application.

As shown in fig. 2, in the prior art, the supporting frame 3 of the backlight module 100 is disposed between the back plate 1 and the diffusion plate 2, and one side of the supporting frame 3 away from the back plate 1 abuts against the diffusion plate 2 for supporting the diffusion plate 2, so as to prevent the diffusion plate 2 from being recessed and affecting the light mixing distance, and further affecting the display performance of the display device 300. However, the support frame 3 in the related art can only support and restrict a single direction when the diffusion plate 2 is depressed, and cannot restrict the protrusion of the diffusion plate 2, resulting in a change in the distance between the diffusion plate 2 and the back plate 1. As shown in fig. 3, when the display device 300 is in an upright state during actual use, the diffusion plate 2 generates a local convex point a under the action of gravity, or the back plate 1 is deformed unevenly to cause a local concave point B, the support frame 3 does not limit the convex point a and the concave point B, and the convex point a and the concave point B may cause the distance between the diffusion plate 2 and the back plate 1 to become larger or smaller, which causes the ideal light mixing distance of the backlight module 100 to change, and affects the display performance.

In view of this, the present application provides a backlight module 100 to solve the problem that the support frame 3 can only perform one-way concave limitation on the diffuser plate 2 in the prior art, so that the height of the support frame 3 can be raised and lowered to limit the concave and convex of the diffuser plate 2, thereby implementing accurate debugging of the light mixing distance.

Referring to fig. 5 to 8, fig. 5 is a partially enlarged cross-sectional view of a region C of the backlight module provided in fig. 4, fig. 6 is a structural schematic view of an embodiment of a support frame of the backlight module provided in fig. 4, fig. 7 is a structural schematic view of another embodiment of the support frame of the backlight module provided in fig. 4, and fig. 8 is a partially enlarged cross-sectional view of the support frame and the back plate of the backlight module provided in fig. 4.

The backlight module 100 provided by the present application comprises a back plate 1, a diffusion plate 2, a support frame 3 and a debugging knob 4. The back plate 1 is provided with mounting holes 10, the diffusion plates 2 are arranged at one side of the back plate 1 at intervals, the support frame 3 comprises an adjusting rod 30 and a gear lever 31, a first end 301 of the adjusting rod 30 is connected with the diffusion plate 2, for example, the first end 301 of the adjusting rod 30 is fixedly connected with the diffusion plate 2 in a rotatable manner; the second end 302 of the adjustment lever 30 is fixedly connected with the shift lever 31. The outer peripheral surface of the gear lever 31 is provided with a plurality of protrusions arranged at intervals along the length direction of the gear lever 31, the part of the gear lever 31 located between two adjacent protrusions penetrates through the mounting hole 10 and is limited in the mounting hole 10 by two adjacent protrusions, and the length of the part of the gear lever 31 located between two adjacent protrusions is greater than the length of the mounting hole 10. Debugging knob 4 is connected with backplate 1 and gear lever 31 respectively, can drive gear lever 31 and remove along the length direction of gear lever 31 through rotatory debugging knob 4.

It can be understood that, by configuring the supporting frame 3 to include the fixedly connected adjusting rod 30 and the shift lever 31, and by configuring a plurality of protrusions on the outer circumferential surface of the shift lever 31 at intervals along the length direction, the height position of the plurality of protrusions on the outer circumferential surface of the shift lever 31 relative to the mounting hole 10 of the back plate 1 can be adjusted to roughly adjust the length of the supporting rod between the diffuser plate 2 and the back plate 1, that is, the light mixing distance can be roughly adjusted, so that the light mixing distance can be adjusted to be within a proper range. The part of the gear lever 31 between the two adjacent protrusions is penetrated through and limited in the mounting hole 10 by the two adjacent protrusions, the gear lever 31 is driven by the rotation of the debugging knob 4 to move in the range between the two adjacent protrusions along the length direction, and then the length of the support frame 3 between the diffusion plate 2 and the back plate 1 is further finely adjusted, namely, the light mixing distance is more accurately debugged. Realize the lift of support frame 3 through the aforesaid setting, the distance between diffuser plate 2 and backplate 1 is adjusted along its length direction's displacement to the lift distance of adjusting support frame 3 promptly through the lift distance of adjusting support frame 3, control diffuser plate 2's sunken and protruding, and then the mixed light distance of adjustment to satisfy the demand of different mixed light distances, realize the accurate debugging to mixed light distance, promote display device 300's display performance such as picture taste and luminance homogeneity.

Specifically, referring to fig. 4 and 5, the supporting frame 3 includes an adjusting rod 30 and a shift position rod 31, the shift position rod 31 is located at one end of the adjusting rod 30 far away from the diffuser plate 2, one end of the adjusting rod 30 close to the diffuser plate 2 is a first end 301, one end of the adjusting rod 30 far away from the diffuser plate 2 is a second end 302, and the second end 302 of the adjusting rod 30 is fixedly connected to the shift position rod 31. In the present embodiment, the adjustment lever 30 and the shift lever 31 have substantially the same shape and are both cylindrical, and in other embodiments, the adjustment lever 30 and the shift lever 31 may have different shapes and may be provided in any shape such as a prism shape. Optionally, the adjusting rod 30 and the gear lever 31 may be integrally formed, or may be fixedly connected to each other through two separate structural members, and the adjusting rod 30 and the gear lever 31 may be coaxially disposed, or may be disposed non-coaxially. As shown in fig. 6, in one embodiment, the shift lever 31 and the adjustment lever 30 are coaxially disposed and integrally formed.

As shown in fig. 7, in another embodiment, the supporting frame 3 may further include a supporting plate 32, the supporting plate 32 is disposed between the shift rods 31 and the adjusting rod 30 and is parallel to the back plate 1, the shift rods 31 are parallel to the length direction of the adjusting rod 30 and are spaced from each other, the shift rods 31 are fixedly connected to the adjusting rod 30 through the supporting plate 32, specifically, the shift rods 31 are fixedly connected to a surface of the supporting plate 32 close to one side of the back plate 1, the second end 302 of one adjusting rod 30 is fixedly connected to a surface of the supporting plate 32 away from one side of the back plate 1, the shift rods 31 are not coaxially arranged with the adjusting rod 30, the back plate 1 is provided with a plurality of mounting holes 10 corresponding to the shift rods 31, one ends of the shift rods 31 far from the adjusting rod 30 are assembled in the mounting holes 10 in a one-to-one correspondence manner, the shift rods 31 connected to the supporting plate 32 can be simultaneously adjusted, so that the shift rods 31 simultaneously along the length direction thereof to drive the supporting plate 32 and the adjusting rod 30 connected to move, thereby adjusting the light mixing distance between the back plate 1 and the diffusion plate 2. Optionally, the plurality of gear rods 31 may be uniformly distributed on the surface of the supporting plate 32 or randomly distributed, and the plurality of gear rods 31 are uniformly distributed on the surface of the supporting plate 32, so that the heights of the positions on the supporting plate 32 are equal when the gear rods 31 are adjusted, that is, it is ensured that the adjustment rod 30 is not inclined to affect the adjustment of the light mixing distance. For example, the support plate 32 may have a triangular shape, the number of the shift levers 31 may be three, and the three shift levers 31 may be respectively connected to three vertex positions of the support plate 32, so that the support frame 3 is controlled to move along the length direction of the shift levers 31 by adjusting the three shift levers 31 simultaneously, thereby adjusting the light mixing distance.

Referring to fig. 4 and 5, the first end 301 of the adjusting rod 30 and the diffuser plate 2 are connected to each other by a snap connection or the like. Specifically, a connecting hole 303 is formed in the center of the end face of the first end 301 of the adjusting rod 30, a connecting piece 21 is arranged on the surface of one side, close to the back plate 1, of the diffusion plate 2, corresponding to the position of the connecting hole 303 of the adjusting rod 30, a clamping block is arranged on the hole wall of the connecting hole 303, a groove is formed in the position, corresponding to the clamping block, of the connecting piece 21, the connecting piece 21 is assembled in the connecting hole 303, the clamping block of the connecting hole 303 is clamped in the groove of the connecting piece 21, and connection of the adjusting rod 30 and the diffusion plate 2 is achieved. Optionally, a groove may be formed in the hole wall of the connection hole 303, a fixture block may be disposed at a position of the connection member 21 corresponding to the groove of the connection hole 303, and the connection between the adjustment rod 30 and the diffusion plate 2 may be achieved by the fastening connection between the fixture block of the connection member 21 and the groove of the connection hole 303. It can be understood that, by fixedly connecting the first end 301 of the adjusting rod 30 and the diffusion plate 2 to each other, the diffusion plate 2 is limited by the connection of the supporting frame 3, so that the diffusion plate 2 can be prevented from protruding to the side away from the backplate 1 and impacting the display panel 200 to cause the falling or breaking of the display panel 200, and the display panel 200 is effectively protected.

As shown in fig. 5, in an embodiment, the clamping block disposed on the hole wall of the connection hole 303 may be an annular protrusion disposed along the circumferential direction of the adjustment rod 30, the groove of the connection member 21 may also be an annular groove corresponding to the annular protrusion, the adjustment rod 30 and the diffusion plate 2 are connected by mutually clamping the annular protrusion and the annular groove, and the annular protrusion and the annular groove are mutually connected in a matching manner, so that the adjustment rod 30 can rotate along the circumferential direction of the connection member 21, that is, the adjustment rod 30 and the diffusion plate 2 can be fixedly connected in a rotating manner.

As shown in fig. 8, the back plate 1 has a rectangular shape, the back plate 1 is provided with mounting holes 10, the mounting holes 10 are through holes penetrating through two opposite surfaces of the back plate 1, and the mounting holes 10 have a circular shape. The gear lever 31 is substantially cylindrical, the outer peripheral surface of the gear lever 31 is provided with a plurality of protrusions, the plurality of protrusions are arranged at intervals along the length direction of the gear lever 31, one end of the gear lever 31, which is far away from the diffusion plate 2, is arranged in the mounting hole 10, specifically, the part between two adjacent protrusions on the gear lever 31 is arranged in the mounting hole 10 in a penetrating manner, the part between two adjacent protrusions of the gear lever 31 is limited in the mounting hole 10 by the two adjacent protrusions, the length of the part, which is located between two adjacent protrusions, of the gear lever 31 is larger than that of the mounting hole 10, so that after the gear lever 31 is arranged in the mounting hole 10, when no external force or small acting force is applied, only the part, which is located between two adjacent protrusions, can move along the length direction of the mounting hole 10, namely, the part is limited between two adjacent protrusions after penetrating through the backboard 1.

In the present embodiment, the plurality of protrusions provided on the outer peripheral surface of the shift lever 31 are annular, a plurality of protruding rings 311 provided along the circumferential direction of the shift lever 31 are formed, and the plurality of protruding rings 311 are provided at intervals along the longitudinal direction of the shift lever 31. Specifically, the number of the convex rings 311 is N, N is a positive integer greater than or equal to 3, the N convex rings 311 are arranged at equal intervals along the length direction of the shift lever 31, the light mixing distance between the back plate 1 and the diffusion plate 2 is divided into (N-1) shifts, and the height difference between each two adjacent shifts is equal. The height difference between two adjacent gears is a first distance H1, the first distance H1 is the distance between the centers of two adjacent convex rings 311 (as shown in fig. 8), and the size of the first distance H1 is in the range of 3mm to 8mm, so that the supporting frame 3 is suitable for backlight modules 100 with different light mixing distances. The length of the two adjacent convex rings 311 limiting the gear lever 31 in the mounting hole 10 is a second distance H2.

As shown in fig. 8, the number of the convex rings 311 on the outer periphery of the shift lever 31 is 3, the 3 convex rings 311 divide the light mixing distance between the back plate 1 and the diffuser plate 2 into 2 shift positions, which are the first shift position OD1 and the second shift position OD2, respectively, and the height difference between the first shift position OD1 and the second shift position OD2 is the first distance H1. The diameter of the part of the gear lever 31 located in the mounting hole 10 is a first diameter D1, the aperture of the mounting hole 10 is a second diameter D2, the diameter of the convex ring 311 is a third diameter D3, the third diameter D3 is greater than the second diameter D2, so that the gear lever 31 can be limited in the mounting hole 10 by the two adjacent convex rings 311, and the second diameter D2 is greater than the first diameter D1, so that the part between the two adjacent convex rings 311 of the gear lever 31 can freely lift along the length direction of the gear lever 31 in the mounting hole 10.

When the gear lever 31 is subjected to a longitudinal force, the convex ring 311 on the outer periphery of the gear lever can move in the mounting hole 10 under the action of the longitudinal force, so that the gear of the convex ring 311 of the gear lever 31 is adjusted, the length of the support frame 3 between the back plate 1 and the diffusion plate 2 is changed by adjusting the gear of the gear lever 31, and the diffusion plate 2 is driven by the movement of the gear lever 31 to move along the length direction of the gear lever 31, so that the light mixing distance between the back plate 1 and the diffusion plate 2 is roughly adjusted, and the light mixing distance is adjusted to be within a proper gear range. For example, after the shift lever 31 receives a longitudinal downward force, the first shift OD1 is adjusted to the second shift OD2, the first shift OD1 and the second shift OD2 limit the portion between the two shifts in the mounting hole 10, the shift lever 31 drives the diffusion plate 2 to move the height difference between the first shift OD1 and the second shift OD2 toward the side close to the housing 1 along the length direction of the shift lever 31, that is, the shift lever 31 descends by the first distance H1, the light mixing distance between the diffusion plate 2 and the housing 1 is correspondingly reduced by the first distance H1, and the light mixing distance is adjusted to the range between the second shift OD2 and the first shift OD1, so as to realize the rough adjustment of the light mixing distance.

Set up the arch through its length direction interval in the periphery of gear pole 31, carry on spacingly by two adjacent archs to gear pole 31, the protruding length that support frame 3 is located between backplate 1 and diffuser plate 2 is adjusted for the position of backplate 1 to the arch of adjusting gear pole 31 through the effect of longitudinal force, and then can realize the coarse adjustment to mixing the light distance, support frame 3 can go up and down along its length direction, namely the distance between backplate 1 and diffuser plate 2 can increase and also can reduce, support frame 3 can all play the limiting displacement to the sunken and protruding of diffuser plate 2, will mix the light distance and debug to suitable within range through the lift gear of adjusting support frame 3, with the mixed light demand of satisfying the difference, make a plurality of LED units 7 realize even mixed light, promote display device 300's luminance uniformity and show the picture quality.

Referring to fig. 9 to 11, fig. 9 is a sectional view of a region D of an embodiment of the backlight module provided in fig. 4, fig. 10 is a sectional view of a region D of another embodiment of the backlight module provided in fig. 4, and fig. 11 is a sectional view of a region D of yet another embodiment of the backlight module provided in fig. 4.

Referring to fig. 9, in the embodiment, the backlight module 100 further includes a debugging frame 5, and the debugging frame 5 is fixedly disposed on one side of the back plate 1 far away from the diffuser plate 2 and is fixedly connected to the back plate 1. The periphery of debugging knob 4 is provided with the screw thread, and debugging knob 4 can be respectively with debug frame 5 or shift lever 31 between through screw thread swivelling joint, can drive shift lever 31 along its length direction removal by debugging knob 4 for debugging frame 5 or shift lever 31 rotation through rotating debugging knob 4. After the supporting frame 3 is adjusted by the gear of the convex ring 311 of the gear lever 31, the light mixing distance is roughly adjusted to a proper range, and further the rotation of the adjusting knob 4 enables the part of the gear lever 31 between two adjacent convex rings 311 to precisely move along the length direction, so that the length of the supporting frame 3 between the back plate 1 and the diffusion plate 2 is precisely adjusted, that is, the light mixing distance can be precisely adjusted, and the light mixing distance is precisely adjusted to an ideal value, so that the display performance of the display device 300 is better. Because the outer peripheral surface of the gear lever 31 is provided with the convex ring 311, the debugging knob 4 can only drive the gear lever 31 to move between two adjacent protrusions, the movable distance of the gear lever 31 driven by rotating the debugging knob 4 along the length direction thereof is the length of the part of the gear lever 31 located between two adjacent protrusions minus the length of the mounting hole 10, that is, the fine adjustment size range is the length of the second distance H2 minus the mounting hole 10, and the length of the mounting hole 10 refers to the size of the mounting hole 10 along the length direction of the gear lever 31.

In one embodiment, the debugging frame 5 is provided with a first screw hole 50, the debugging knob 4 is in threaded rotary connection with the debugging frame 5 through the first screw hole 50, and the debugging knob 4 passes through the first screw hole 50 and is connected with the gear lever 31. The adjustment knob 4 is rotated in the first screw hole 50 to move in the longitudinal direction of the adjustment knob 4 relative to the adjustment frame 5, thereby moving the shift lever 31 in the longitudinal direction. Optionally, the shift lever 31 and the adjustment knob 4 may be fixedly connected, or may be rotatably sleeved.

In one embodiment, as shown in fig. 9, the gear lever 31 is fixedly connected to the adjustment knob 4, and specifically, one end of the adjustment knob 4 close to the back plate 1 passes through the first screw hole 50 and is connected to an end surface of one end of the gear lever 31 far away from the adjustment rod 30. Rotate in first screw 50 through debugging knob 4 and remove for debugging frame 5 at the length direction of debugging knob 4, simultaneously because gear pole 31 and debugging knob 4 fixed connection, also fixed connection between regulation pole 30 and the gear pole 31, the first end 301 of adjusting pole 30 is mutually supported through the annular groove of annular lug and the connecting piece 21 of diffuser plate 2 and is connected, adjust pole 30 can be along the circumferential direction of connecting piece 21, so can drive gear pole 31 and debugging knob 4 synchronous revolution when debugging knob 4 is rotatory, and make gear pole 31 remove along its length direction. The rotation through debugging knob 4 drives gear lever 31 and carries out the fine tuning along its length direction's removal to mixing light distance for the debugging of mixing light distance is more accurate, can reach the ideal value, thereby satisfies the demand of different mixing light distances. Optionally, the shift lever 31 and the adjusting knob 4 may be integrally formed, or may be fixedly connected by welding or other methods. During fine adjustment, the adjusting knob 4 rotates for one circle, and the gear lever 31 rises or falls by about 1-2 mm; namely, during fine adjustment, the adjustment amplitude is 1-2 mm/circle; because the adjustment range is very small during fine adjustment, for example, when 1/4 of a turn is adjusted, the gear lever 31 only ascends or descends by about 0.25 to 0.5 mm; compared with coarse adjustment, the fine adjustment amplitude is greatly reduced, and the debugging scene of more light mixing distances can be met, so that the light mixing distance debugging is more accurate, and the display effect of the display panel 200 after debugging is better.

In another embodiment, as shown in fig. 10, the gear lever 31 is rotatably sleeved with the adjustment knob 4, specifically, a center hole 312 is provided in a center of an end surface of one end of the gear lever 31, which is far away from the adjustment rod 30, an aperture of the center hole 312 is larger than a diameter of the adjustment knob 4, one end of the adjustment knob 4, which is close to the back plate 1, passes through the first screw hole 50 and is disposed in the center hole 312 of the gear lever 31, the center hole 312 of the gear lever 31 is sleeved with the adjustment knob 4, and since the aperture of the center hole 312 of the gear lever 31 is larger than the diameter of the adjustment knob 4, the adjustment knob 4 can rotate in the center hole 312. The debugging knob 4 rotates in the first screw hole 50 and moves relative to the debugging frame 5 in the length direction of the debugging knob 4, so that the gear lever 31 can rotate relative to the gear lever 31 and can be driven to move along the length direction of the gear lever, and the gear lever 31 cannot rotate along with the rotation of the debugging knob 4. That is, only the debugging knob 4 takes place to rotate, and the gear pole 31 only takes place to move in its length direction for debugging frame 5 under the drive of debugging knob 4 to this comes to carry out the fine setting to mixed light distance, makes mixed light distance can reach the ideal value, satisfies the demand of different mixed light distances. It is understood that in this embodiment, a limit bump may be disposed in the central hole 312, and the outer surface of the adjustment knob 4 has a limit groove, so that the adjustment knob 4 can rotate in the central hole 312, but the adjustment knob 4 moves synchronously with the shift lever 31 in the length direction of the adjustment knob 4.

As shown in fig. 11, in one embodiment, a second screw hole 313 is provided on an end surface of the shift lever 31 away from one end of the adjusting lever 30, a first through hole 51 is provided on the commissioning bracket 5 corresponding to the second screw hole 313, and one end of the commissioning knob 4 close to the back plate 1 passes through the first through hole 51 and is screwed with the second screw hole 313 of the shift lever 31. The diameter of the first through hole 51 may be larger than the diameter of the commissioning knob 4, the commissioning knob 4 rotates in the first through hole 51 and is stationary relative to the commissioning frame 5 in the length direction of the commissioning knob 4, i.e. the commissioning knob 4 idles in the first through hole 51 without moving in its length direction. Through debugging knob 4 rotatory and debugging knob 4 and the cooperation of second screw 313 for gear pole 31 can make gear pole 31 remove along its length direction, through the distance that adjustment control gear pole 31 removed along its length direction, can adjust the mixed light distance between backplate 1 and diffuser plate 2, carry out more accurate debugging to mixing the light distance to satisfy different mixed light demands.

Referring to fig. 4, the backlight assembly 100 further includes a reflection sheet 6, an LED unit 7, a brightness enhancement film 8, a diffusion film 9, and a frame 99. One end of the back plate 1 and the diffusion plate 2 is fitted into the frame 99, and the reflection sheet 6 is provided on the surface of the back plate 1 on the side close to the diffusion plate 2, and has the same shape as the entire shape of the back plate 1, and may be generally rectangular or square. The reflective sheet 6 has a plurality of openings, and the plurality of LED units 7 are disposed on the surface of the back plate 1 near the diffuser plate 2 and exposed between the reflective sheet 6 and the diffuser plate 2 through the openings of the reflective sheet 6, so as to ensure that the LED units 7 emit light smoothly to provide a light source for the display device 300. The reflector 6 has a property of reflecting light, so that light emitted from the LED unit 7 toward the back plate 1, or light reflected back to one side of the back plate 1 by other elements in the backlight module 100, can be reflected by the reflector 6 toward the light emitting side again, thereby improving the utilization efficiency of the light source. There is a large space between the reflection sheet 6 and the diffusion plate 2 so that the LED units 7 can mix light uniformly, and the distance between the light emitting surface of the reflection sheet 6, i.e., the surface of the reflection sheet 6 close to the diffusion plate 2, and the light incident surface of the diffusion plate 2, i.e., the surface of the diffusion plate 2 close to the backplate 1, is the light mixing distance. The brightness enhancement film 8 and the diffusion film 9 are stacked on the surface of the diffusion plate 2 away from the back plate 1, so that the brightness of the backlight module 100 can be improved, the utilization efficiency of light can be improved, and the shape of the brightness enhancement film is the same as the overall shape of the diffusion plate 2, and can be generally rectangular or square, or can be other shapes.

The diffusion plate 2 can be made of PMMA/PS/PC material by injection molding, the support frame 3 can be made of optical ceramic material, magnesium oxide or aluminum oxide and the like, the material is formed by hot pressing and sintering at 1700-1950 ℃, and the high-purity raw material is subjected to pore removal in a high-temperature high-pressure environment and is polished on the surface to improve the transmittance.

Referring to fig. 12 to 14, fig. 12 is a schematic distribution structure diagram of an embodiment of the supporting frame of the backlight module provided in fig. 4, fig. 13 is a schematic distribution structure diagram of another embodiment of the supporting frame of the backlight module provided in fig. 4, and fig. 14 is a schematic distribution structure diagram of another embodiment of the supporting frame of the backlight module provided in fig. 4.

The backlight module 100 includes a plurality of supporting frames 3, and the supporting frames 3 can be distributed in different forms in the backlight module 100 to meet the requirements of different light mixing distances of the backlight module 100. Specifically, a partition control mode may be adopted to specifically arrange the support frames 3 in different areas of the backlight module 100, so as to achieve partition dynamic adjustment of the light mixing distance, and improve the image quality and brightness uniformity of the display device 300.

As shown in fig. 12, in one embodiment, the light mixing distances of the regions of the backlight module 100 are different, the supporting frames 3 are distributed in the backlight module 100 in an array manner, the supporting frames 3 are distributed uniformly in the backlight module 100 in an array structure, and the light mixing distances of the different regions of the backlight module 100 are dynamically adjusted uniformly by adjusting the lengths of the supporting frames 3 between the back plate 1 and the diffusion plate 2.

As shown in fig. 13, in another embodiment, the light mixing distance difference between the central area S1 and the peripheral area S2 of the backlight module 100 is larger, and the distribution density of the plurality of supporting frames 3 of the backlight module 100 in the central area S1 corresponding to the diffuser plate 2 is larger than the distribution density of the plurality of supporting frames 3 in the peripheral area S2 corresponding to the diffuser plate 2, so that the light mixing distances of the central area S1 and the peripheral area S2 of the backlight module 100 can be adjusted by adjusting the plurality of supporting frames 3 in the central area S1 and the peripheral area S2 of the diffuser plate 2, respectively, so that the light mixing distances of different areas of the backlight module 100 can reach an ideal value, and the LED units 7 located between the back plate 1 and the diffuser plate 2 can mix light more uniformly, thereby improving the display performance of the display device 300.

As shown in fig. 14, in another embodiment, the display panel 200 of the display device 300 is a curved display panel 200, the cross-sectional shape of the display panel 200 is curved and is symmetrically disposed about the central axis of the display panel 200, and the plurality of supporting frames 3 of the backlight module 100 are also symmetrically distributed about the central axis of the display panel 200, wherein the distribution density of the supporting frames 3 at the positions corresponding to the vertexes of the curved display panel 200 is greater than the distribution density of the supporting frames 3 at the other positions, and the diffusion plates 2 in different regions are supported by the supporting frames 3 through the local partition arrangement of the supporting frames 3 in the backlight module 100, so that the diffusion plate 2 which is easy to deform is effectively controlled to continuously maintain the curved shape, thereby stabilizing the structure of the curved display device 300, improving the stability of the curved display device 300, and further improving the display performance.

Referring to fig. 15, fig. 15 is a partial cross-sectional view of a backlight module according to a second embodiment of the present application.

The backlight module 100 provided in the second embodiment of the present application has substantially the same structure as the backlight module 100 provided in the first embodiment of the present application, except that the backlight module 100 provided in the second embodiment of the present application does not have the adjusting frame 5, but includes the fixing plate 33.

As shown in fig. 15, in particular, the fixing plate 33 is disposed on a side of the back plate 1 close to the diffuser plate 2 and is fixedly connected to the shift lever 31. The fixing plate 33 may be disposed parallel to the back plate 1, and may have any shape such as a rectangle, a circle, and an ellipse. Debugging knob 4 also locates the backplate 1 and is close to the one side of gear pole 31, and the face of fixed plate 33 is equipped with third screw 330, and third screw 330 can be for passing the through-hole of fixed plate 33 face, and debugging knob 4 passes through screw thread swivelling joint with the third screw 330 of fixed plate 33, and the one end and the backplate 1 butt that diffuser plate 2 was kept away from to debugging knob 4. On the basis that the distance of mixing light between backplate 1 and diffuser plate 2 is roughly adjusted to different gears through setting up the bulge loop 311 with gear lever 31 outer peripheral face to, further through the screw thread swivelling joint between debugging knob 4 and the fixed plate 33, rotatory debugging knob 4 can make fixed plate 33 move along the length direction of gear lever 31 by the rotation of debugging knob 4 for fixed plate 33, and then drive gear lever 31 through fixed plate 33 and remove along its length direction, come to carry out accurate debugging to the distance of mixing light between backplate 1 and diffuser plate 2 with this, in order to satisfy the demand of the distance of mixing light that is blind. It will be appreciated that in order to force the fixing plate 33 evenly, a plurality of adjustment knobs 4 may be arranged around the gear lever 31, for example three adjustment knobs 4 are distributed triangularly.

Different from the prior art, the present application discloses a backlight module 100 and a display device 300, wherein the backlight module 100 includes a back plate 1, a diffusion plate 2 and a support frame 3; the back plate 1 has mounting holes 10; the diffusion plates 2 are arranged at one side of the back plate 1 at intervals; the support frame 3 comprises an adjusting rod 30 and a gear lever 31, wherein a first end 301 of the adjusting rod 30 is connected with the diffusion plate 2, and a second end 302 is fixedly connected with the gear lever 31; the outer peripheral surface of the gear lever 31 is provided with a plurality of protrusions arranged at intervals along the length direction of the gear lever 31, and the part of the gear lever 31 positioned between two adjacent protrusions is arranged in a penetrating manner and limited in the mounting hole 10 by two adjacent protrusions; the length of the part of the gear lever 31 between two adjacent protrusions is greater than the length of the mounting hole 10; the backlight module 100 further comprises a debugging knob 4, and the debugging knob 4 is respectively connected with the back plate 1 and the gear lever 31; the gear lever 31 can be driven to move along the length direction of the gear lever 31 by rotating the debugging knob 4. Through the setting, adjust the mixed light distance between diffuser plate 2 and backplate 1 by support frame 3, solved among the prior art support frame 3 can only one-way restriction diffuser plate 2 sunken problem for support frame 3 can all restrict the arch and the sunken all of diffuser plate 2, and then realizes mixing the accurate debugging of light distance.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. A backlight module includes:

a back plate having a mounting hole;

the diffusion plates are arranged on one side of the back plate at intervals;

the support frame comprises an adjusting rod and a gear rod; the first end of the adjusting rod is connected with the diffusion plate, and the second end of the adjusting rod is fixedly connected with the gear lever; it is characterized in that the preparation method is characterized in that,

the outer peripheral surface of the gear lever is provided with a plurality of bulges which are arranged at intervals along the length direction of the gear lever, and the part of the gear lever, which is positioned between two adjacent bulges, is penetrated and limited in the mounting hole by the two adjacent bulges;

2. The backlight module according to claim 1, further comprising:

3. The backlight module according to claim 2, wherein the debugging frame is provided with a first screw hole, the debugging knob is in threaded rotary connection with the debugging frame through the first screw hole, and the debugging knob passes through the first screw hole and is connected with the gear lever; the debugging knob rotates in the first screw hole to move relative to the debugging frame in the length direction of the debugging knob, so that the gear lever can be driven to move along the length direction of the gear lever; or

4. The backlight module as claimed in claim 3, wherein the debugging frame is provided with a first screw hole, the debugging knob is in threaded rotary connection with the debugging frame through the first screw hole, and the debugging knob passes through the first screw hole and is connected with the gear lever; the gear lever is fixedly connected with the debugging knob; the debugging knob rotates in the first screw hole and moves relative to the debugging frame in the length direction of the debugging knob, so that the gear lever and the debugging knob can be driven to synchronously rotate and move along the length direction of the gear lever; or

5. The backlight module as claimed in claim 1, wherein one of the position-adjusting levers is coaxially disposed with the adjusting lever and is integrally formed therewith; or

6. The backlight module as claimed in claim 1, wherein the supporting frame further comprises a fixing plate disposed on a side of the back plate close to the diffuser plate and fixedly connected to the shift lever; the debugging knob is rotatably connected with the fixing plate through threads, and one end of the debugging knob is abutted against the back plate; the gear lever can be driven by the fixing plate to move along the length direction of the gear lever through the rotation of the debugging knob relative to the fixing plate.

7. The backlight module according to claim 1, wherein the protrusions are protruding rings disposed along a circumferential direction of the shift lever, the number of the protruding rings is N, and the N protruding rings are disposed at equal intervals along a length direction of the shift lever; the convex ring divides the light mixing distance between the back plate and the diffusion plate into (N-1) gears, and the height difference between every two adjacent gears is equal;

8. The backlight module as claimed in claim 1, wherein the first end of the adjusting bar is connected to the diffuser plate by a snap-fit connection.

9. The backlight module according to claim 1, wherein the backlight module comprises a plurality of support frames, and the plurality of support frames are uniformly distributed in an array structure; or

10. A display device, comprising:

a display panel;

the backlight module is used for providing backlight for the display panel; the backlight module as claimed in any one of claims 1 to 9.