CN111323970A

CN111323970A - Backlight module and display device

Info

Publication number: CN111323970A
Application number: CN202010273210.3A
Authority: CN
Inventors: 邹家鹏
Original assignee: TCL Huaxing Photoelectric Technology Co Ltd
Current assignee: TCL China Star Optoelectronics Technology Co Ltd; TCL Huaxing Photoelectric Technology Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-06-23
Anticipated expiration: 2040-04-09
Also published as: CN111323970B

Abstract

The application discloses backlight unit and display device, backlight unit is including gluing frame, optics diaphragm group and diffuser plate, just it includes vertical face and the inclined plane that meets each other to glue the frame, wherein, the diffuser plate with the inclined plane butt, and the contact surface is the inclined plane, and with the inclined plane cooperatees, optics diaphragm group overlap joint in glue the frame top, compare in prior art, the backlight unit that this application provided sets up to the inclined plane through the contact surface with diffuser plate and gluey frame to eliminate the diffuser plate and glue the perpendicular attached shading of frame and the dark area that forms, thereby increased backlight unit's luminance homogeneity, promoted product quality.

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 with the backlight module.

Background

The technical development of the liquid crystal panel is different day by day, the performance specification is improved continuously, the requirements of a module matched with the liquid crystal panel are also improved continuously, the resolution ratio of the mainstream liquid crystal panel at present reaches the FHD level, the 4K and 2K products are exposed completely, the improvement of the resolution ratio leads to the reduction of the penetration rate, and therefore, higher requirements are provided for the backlight brightness.

At present, in a backlight structure, a diffusion plate and each optical film are assembled with a rubber frame through a buckle or glue dispensing, the inner side wall of the rubber frame forms a bright line due to light reflection, the diffusion plate and the rubber belt part of the rubber frame form a dark band, and when a narrow frame is designed, bright and dark edges are formed at the edge of a screen due to brightness difference, so that the quality of a product is seriously influenced especially in high-order products such as a spliced screen or an ultra-narrow frame.

Disclosure of Invention

The embodiment of the application provides a backlight unit and display device, can improve the bright dark border phenomenon in edge, improves display effect to glue frame department and form bright line and dark zone easily among the solution prior art, thereby influence the technical problem who shows.

The embodiment of the application provides a backlight module, which comprises a rubber frame, a diffusion plate and an optical film group arranged on the rubber frame;

one side of the rubber frame facing the interior of the backlight module comprises a vertical surface and an inclined surface which are connected with each other;

the diffusion plate is abutted against one side, close to the vertical surface, of the inclined surface, the contact surface of the diffusion plate and the inclined surface is an inclined surface, and the inclined angle of the contact surface is matched with the inclined surface, so that the diffusion plate is arranged below the optical diaphragm group and is parallel to the optical diaphragm group;

the optical film set is lapped on the top of the rubber frame.

In an embodiment of the present application, the vertical surface is disposed between the inclined surface and the optical film group, and a distance between the diffuser plate and the optical film group is greater than or equal to a height of the vertical surface.

In one embodiment of the present application, a plurality of light reflecting structures are distributed on the vertical surface for changing the path of the light.

In an embodiment of the present application, the plurality of light reflecting structures include a plurality of columns of pits distributed at intervals, and the cross-sectional size and the depth of each of the columns of pits are 3-5 um.

In an embodiment of the application, a plurality of reflective structure include a plurality of recesses that are parallel to each other, and every recess is 10 ~ 15um along the ascending length in parallel direction, and the degree of depth of every recess is 3 ~ 5 um.

In one embodiment of the present application, a reflective layer is disposed on the inclined surface, and the reflective layer includes a reflective material coated or attached on the inclined surface.

In an embodiment of the application, the backlight module further includes a back plate, the rubber frame is arranged on the back plate, and a joint of the vertical surface and the inclined surface is in lap joint with the back plate.

In an embodiment of the present application, a circuit board and a light source are disposed on a side of the back plate facing the diffusion plate.

In one embodiment of the present application, the rubber frame comprises plastic injection molding or metal splicing molding.

According to the above object of the present application, a display device is provided, which includes the backlight module and a display panel disposed on one side of the backlight module.

The position that this application embodiment contacted through with diffuser plate and gluey frame sets up to the inclined plane for the inclined plane of diffuser plate and the inclined plane butt of gluey frame, in order to eliminate because of the diffuser plate with glue the perpendicular attached shading of frame and form the dark band, improved backlight unit and bright dark uneven phenomenon, improved backlight unit's luminance homogeneity, promoted the product quality, improved display effect.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of a partially enlarged structure of a backlight module according to an embodiment of the present disclosure.

Fig. 3 is a schematic view of a vertical plane structure according to an embodiment of the present application.

Fig. 4 is a schematic view of another vertical plane structure provided in an 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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

This application is to among the current backlight unit, because frame department forms bright line and dark zone easily to influence the technical problem who shows.

In order to solve the above technical problems, an embodiment of the present application provides a backlight module and a display device, where the backlight module includes a rubber frame, a diffuser plate, and an optical film set disposed on the rubber frame;

the optical film set is lapped on the top of the rubber frame.

Specifically, referring to fig. 1, the backlight module includes a plastic frame 101, an optical film set 103, and a diffusion plate 102, wherein the plastic frame 101 includes a vertical surface 1011 and an inclined surface 1012 connected to each other, the diffusion plate 102 abuts against one side of the inclined surface 1012 near the vertical surface 1011, a contact surface between the diffusion plate 102 and the inclined surface 1012 is also an inclined surface, and an inclination angle of the contact surface is the same as that of the inclined surface 1012, so that the diffusion plate 102 is disposed under the optical film set 103 and is parallel to the optical film set 103, and the optical film set 103 is disposed on the top of the plastic frame 101.

It should be noted that the schematic structural diagram of the backlight module provided in the embodiment of the present application is only a structure of one side of the backlight module for description, and structures of the other sides can refer to the drawing.

In the implementation application process, because the diffuser plate forms the dark band with the perpendicular attached shading of gluey frame, thereby seriously influenced display effect, and the embodiment of the application provides a backlight unit, wherein, set up the gluey frame that does not have platform structure in backlight unit, make the diffuser plate contact with the inclined plane of gluing the frame, and set up the diffuser plate and the contact surface who glues between the frame into the inclined plane, cooperate with the inclined plane, thereby eliminated the diffuser plate and glued the perpendicular attached shading of frame and the dark band that forms, the homogeneity of backlight unit luminance has been improved, display effect has been improved.

Further, please refer to fig. 1 and fig. 2.

The vertical surface 1011 is disposed between the inclined surface 1012 and the optical film set 103, and the vertical surface 1011 is located between the diffusion plate 102 and the optical film set 103, and a distance between the diffusion plate 102 and the optical film set 103 is greater than or equal to a height of the vertical surface 1011.

In an embodiment of the present application, the distance between the diffusion plate 102 and the optical film set 103 is equal to the height of the vertical surface 1011, that is, the optical film set 103 is disposed on the top of the rubber frame 101.

One end of the inclined surface 1012, which is far away from the vertical surface 1011, is inclined towards the inside of the backlight module relative to the vertical surface 1011, and an included angle between the vertical surface 1011 and the inclined surface 1012 is an obtuse angle.

In addition, in this application embodiment, it has a plurality of reflection of light structures 109 to distribute on the vertical face 1011 for change the route of light, because the vertical face 1011 of gluing frame 101 can make because the reflection of light glue frame 101 department and form the bright line, thereby make the marginal luminance increase of gluing frame 101, and this application embodiment is through setting up reflection of light structures 109 for light can reflect back inside the backlight unit, thereby reduces marginal bright line luminance, has increased the homogeneity of luminance.

In an embodiment of the present application, please refer to fig. 1, fig. 2, and fig. 3, the light reflecting structure 109 includes a plurality of pits, and the cross-sectional size and the depth of each pit can be 3-5 um, wherein the cross-sectional size and the depth of each pit can be independently selected, and it is not required that the cross-sectional sizes of all the pits are the same, nor that the depths of all the pits are the same.

The shape of the concave pit includes a circle, an ellipse, a triangle, a rectangle, and other polygons, which is not limited herein, and in this embodiment, the concave pit is an ellipse.

The pits may be uniformly distributed on the vertical surface 1011, in this embodiment, the light reflecting structure 109 includes a plurality of rows of pits distributed at intervals, and the cross-sectional size and the depth of each pit are equal.

The pits can be distributed on the vertical surface 1011 unevenly, the pits with higher distribution density can be arranged at the position with higher light reflection degree according to actual requirements, and the pits with lower distribution density can be arranged at the position with lower light reflection degree.

The pit can achieve the effect of effectively blocking reflected light, large-angle diffuse reflection light in the pit can be blocked by the edge end of the pit to be subjected to diffuse reflection again, so that light can be concentrated and concentrated to be re-input into diffuse reflection and enter the backlight module to achieve effective reflection light, and the edge of the rubber frame 101 cannot generate bright lines and the problem of light leakage.

In another embodiment of the present application, please refer to fig. 1, fig. 2 and fig. 4, the light reflecting structure 109 includes a plurality of grooves, and the length of the groove is 10-15 um, and the depth of the groove is 3-5 um, and the length and the depth of each groove can be independently selected, and it is not required that all the groove lengths and depths are the same.

And the shape of the groove includes a rectangle or other polygons, which is not limited herein.

In this embodiment, light reflecting structure 109 includes a plurality of recesses that are parallel to each other, just the length of recess on along parallel direction is 10 ~ 15um, and the degree of depth of every recess is 3 ~ 5 um.

In addition, the direction parallel to the grooves is not limited, and in this embodiment, the direction is parallel to the diffusion plate 102, and may also be along the direction perpendicular to the diffusion plate 102, or may also be in a direction forming any angle with the diffusion plate 102.

The extending direction of the groove is not required to be a straight line, the extending direction of the groove can be a bent shape, and also can be a circular ring shape which is formed by sequentially surrounding a plurality of circles, or groove structures of other patterns.

The groove can effectively block reflected light, and large-angle diffuse reflection light in the groove enables light rays to be more concentrated and to be re-input into the backlight module for effective reflection, and the edge of the rubber frame 101 cannot generate bright lines and light leakage problems.

And the reflecting structure 109 can also be coated with a reflecting material, so as to further improve the reflecting capability and increase the brightness of the backlight module.

In the embodiment of the present application, please refer to fig. 1 and fig. 2, the inclined surface 1012 is provided with the reflective layer 104, and the reflective layer 104 includes a reflective material coated or attached on the inclined surface 1012 to form brightness reinforcement.

The reflective material comprises white ink or other light reflective material.

In addition, the backlight module further includes a back plate 105, and the rubber frame 101 is disposed on the back plate 105, wherein a connection portion between the vertical surface 1011 and the inclined surface 1012 is overlapped with the back plate 105.

And a circuit board 106 and a light source 107 disposed on the circuit board 106 are disposed on a side of the back plate 105 facing the diffusion plate 102, and the light source 107 may be an organic Light Emitting Diode (LED).

Referring to fig. 1, the light sources 107 may extend to a side of the inclined surface 1012 facing away from the diffuser plate 102, that is, four corners of the circuit board 106 and four corners of the backlight module, so that light can reach more positions of the backlight module, and the poor phenomena of shadows and dark frames at the four corners are prevented.

The side of the circuit board 106 is further provided with an auxiliary element 108, one end of the auxiliary element 108 is in contact with the circuit board 106 and the light source 107, the other end of the auxiliary element is in contact with the side wall of the back plate 105, the circuit board 106 can be limited, the auxiliary element 108 can be made of a shading material, or the surface of the auxiliary element 108 can be coated with a shading layer, so that the shading effect is achieved, and the phenomenon that light leaks from the side or the corner of the back plate 105 is prevented.

In the embodiment of the present invention, the plastic frame 101 may be formed by plastic injection molding or metal splicing, and the plastic frame 101, the diffuser plate 102, the optical film set 103, the back plate 105 and the circuit board 106 may be assembled by snap-fitting or glue-dispensing, or other feasible schemes, which are not limited herein.

In the backlight module provided in the embodiment of the present application, only the components and structures related to the technical solution of the present application are described, but not limited thereto, and other light guide plates and various films may be disposed according to a conventional process, which is not described herein again.

In addition, an embodiment of the present application further provides a display device, and the display device includes the backlight module described in the above embodiment, and the structure and components of the backlight module are not described again here.

The display device comprises the backlight module and a display panel arranged on one side of the backlight module, and the display panel is arranged on one side of the backlight module, which is provided with the optical diaphragm set 103.

The display device provided in the embodiment of the present application may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

To sum up, the embodiment of the application provides a backlight unit and have this backlight unit's display device, diffuser plate and gluey frame that meet through the inclined plane in the backlight unit, the dark band that diffuser plate and gluey frame perpendicular attached shading formed has been eliminated, and set up reflecting structure on the vertical face of gluing the frame, make in the light reflection surface, reduce marginal bright line luminance, and set up the reflection stratum on the inclined plane of gluing the frame, in order to realize backlight unit's luminance reinforcement, through above-mentioned technical means, various bright lines have been reduced, the emergence of dark band phenomenon, the homogeneity of backlight unit's luminance has been strengthened, and the display device that this application embodiment provided, through setting up above-mentioned backlight unit, the homogeneity of backlight luminance has been improved, thereby display device's display effect has been improved.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The backlight module and the display device provided by the embodiment of the present application are described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. The utility model provides a backlight module, backlight module including glue frame, diffuser plate and set up in glue the optical film group on the frame, its characterized in that:

the optical film set is lapped on the top of the rubber frame.

2. The backlight module as claimed in claim 1, wherein the vertical surface is disposed between the inclined surface and the optical film set, and the distance between the diffuser plate and the optical film set is greater than or equal to the height of the vertical surface.

3. The backlight module according to claim 1, wherein the vertical surface has a plurality of light reflecting structures distributed thereon for changing the path of light.

4. The backlight module as claimed in claim 3, wherein the plurality of light reflecting structures comprise a plurality of rows of pits, and each of the plurality of rows of pits has a cross-sectional dimension and a depth of 3-5 μm.

5. The backlight module as claimed in claim 3, wherein the plurality of light reflecting structures comprise a plurality of parallel grooves, each of the parallel grooves has a length of 10-15 um, and each of the parallel grooves has a depth of 3-5 um.

6. The backlight module as claimed in claim 1, wherein a reflective layer is disposed on the inclined surface, and the reflective layer comprises a reflective material coated on or attached to the inclined surface.

7. The backlight module according to claim 1, further comprising a back plate, wherein the adhesive frame is disposed on the back plate, and a connection portion between the vertical surface and the inclined surface is overlapped with the back plate.

8. The backlight module as claimed in claim 7, wherein a circuit board and a light source are disposed on the circuit board on a side of the back plate facing the diffuser plate.

9. The backlight module as claimed in claim 1, wherein the plastic frame is formed by injection molding or splicing.

10. A display device, comprising the backlight module as claimed in any one of claims 1 to 9, and a display panel disposed at one side of the backlight module.