CN112198718B

CN112198718B - Backlight module

Info

Publication number: CN112198718B
Application number: CN202011168920.6A
Authority: CN
Inventors: 刘虎
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2022-03-08
Anticipated expiration: 2040-10-28
Also published as: CN112198718A

Abstract

The invention provides a backlight module, which comprises an outer frame, a rubber frame and shading rubber; the frame includes the backplate and is located the lateral wall on the backplate, glues the frame setting on the frame, and the shading is glued and is set up on gluing the frame, and wherein, backlight unit is formed with the kink on one side at least, and the frame corresponds and is provided with a bending stress buffering part at the kink at least. According to the invention, the bending stress buffering component is arranged at the position where the stress of the backlight module is concentrated, so that the stress concentration phenomenon generated when the display panel is bent is effectively relieved, and the bending reliability of the display panel is improved.

Description

Backlight module

Technical Field

The invention relates to the field of display, in particular to a backlight module.

Background

With the development of liquid crystal display technology, liquid crystal display modules have been widely used in electronic terminals such as mobile phones and tablet computers. However, since the lcd panel of the lcd module does not have a light emitting function, a backlight module needs to be disposed below the lcd panel to provide a light source, so as to achieve the display effect. The frame of the existing backlight module is designed to be narrower and narrower, so that more light-emitting elements can be placed in the backlight module, but the narrower and wider frame means that more concentrated stress of the frame is concentrated, so that the frame of the backlight module is easier to break.

Therefore, the existing backlight module has the problem that the frame is easy to break due to the stress concentration of the frame.

Disclosure of Invention

The embodiment of the invention provides a backlight module, which is used for relieving the problem that the existing backlight module is easy to break at a stress concentration part when being bent.

In order to solve the above problems, the technical scheme provided by the invention is as follows:

the invention provides a backlight module, comprising:

the outer frame comprises a back plate and a side wall positioned on the back plate, the back plate and the side wall enclose to form a containing groove, and a backlight source, a light guide plate and an optical diaphragm are arranged in the containing groove;

the rubber frame is arranged on the outer frame;

the shading glue is arranged on the glue frame;

at least one side of the backlight module is provided with a bending part, and the outer frame is provided with at least one bending stress buffering part corresponding to the bending part.

In some embodiments, the outer frame is made of a deformable material, and a buffer material is disposed in the bent portion.

In some embodiments, the rubber frame is disposed at a non-bending portion of the outer frame.

In some embodiments, the height of the upper edge of the buffer component is lower than the height of the upper edge of the non-bending part rubber frame.

In some embodiments, the outer frame bending part is provided with a rubber frame.

In some embodiments, the bending stress buffering component is arranged on one side of the rubber frame far away from the back plate.

In some embodiments, the bending stress buffering member is disposed inside the bent portion rubber frame, and a distance from an upper edge of the bending stress buffering member to an upper edge of the rubber frame is equal to a distance from a lower edge of the bending stress buffering member to a lower edge of the rubber frame.

In some embodiments, the thickness of the bending stress buffering part is one third to one half of the thickness of the non-bending rubber frame.

In some embodiments, the back plate module comprises a first bending region and a second bending region, the first bending region and the second bending region are symmetrically arranged about a central line of the backlight module, the first bending region comprises at least one bending stress buffering component, and the second bending region comprises at least one bending stress buffering component.

In some embodiments, the first bending region includes a first bending stress buffering component and a second bending stress buffering component, the second bending region includes a third bending stress buffering component and a fourth bending stress buffering component, the first bending stress buffering component and the second bending stress buffering component, the third bending stress buffering component and the fourth bending stress buffering component are symmetrically disposed about the central horizontal line of the backlight module, and the first bending stress buffering component and the third bending stress buffering vertical line component are symmetrically disposed about the central horizontal line of the backlight module.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.

Fig. 1 is a schematic plan view of a backlight module in the prior art.

Fig. 2 is a first schematic plan view of a backlight module according to an embodiment of the invention.

Fig. 3 is a first cross-sectional view of a backlight module according to an embodiment of the invention.

Fig. 4 is a second cross-sectional view of a backlight module according to an embodiment of the invention.

Fig. 5 is a second schematic plan view of a backlight module according to an embodiment of the invention.

Fig. 6 is a third schematic plan view of a backlight module according to an embodiment of the invention.

Fig. 7 is a fourth schematic plan view of the backlight module according to the embodiment of the invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.

In the description of the present invention, 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, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. 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 invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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 invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention 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, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the prior art, a display module includes a liquid crystal panel, a circuit board and a backlight template, the backlight template includes a composite frame for combining the display module, as shown in fig. 1, the conventional backlight module includes an outer frame 100, a rubber frame 300 for filling a side wall of the outer frame, and a light-shielding adhesive 200 disposed between the outer frame 100 and the rubber frame 300, but in the prior art, the display module includes a first bending region a1, a second bending region a2, and a flat region A3 disposed between the first bending region a1 and the second bending region a2, and in the first bending region a1 and the second bending region a2, the display module is likely to generate concentrated stress in the bending regions, which results in unstable module bonding or frame fracture.

As shown in fig. 2, the present invention provides a backlight module including a first bending region a1, a second bending region a2, and a flat region A3 disposed between the first bending region a1 and the second bending region a2, the backlight module including: the outer frame 100 comprises a back plate and a side wall positioned on the back plate, wherein the back plate and the side wall enclose to form a containing groove, and a backlight source, a light guide plate and an optical diaphragm are arranged in the containing groove;

a rubber frame 300 disposed around the sidewall;

and the light shielding glue 200 is positioned on one side of the glue frame 300 far away from the bottom.

Wherein the side portion is provided with at least one buffer member in the first and second bending regions a1 and a 2.

In some embodiments, the material of the outer frame 100 is any one of stainless steel or copper alloy, and since the outer frame 100 needs to be bent in the first bending area a1 and the second bending area a2 to at least partially fit the light-shielding glue 200, and the bottom of the outer frame 100 needs to be used for bearing the light source and the optical film in the receiving groove, and the side of the outer frame 100 needs to be filled with the glue frame 300, the outer frame made of stainless steel or copper alloy material can be reliable and easy to bend, thereby reducing the difficulty of the manufacturing process.

In some embodiments, after the outer frame 100 is shaped, a plastic frame is filled in the outer frame 100, the plastic frame 200 is disposed around the side portion, and the buffer member 400 is located in the first bending area a1 and the second bending area a2, and since the first bending area a1 and the second bending area a2 are located at positions where the stress of the display module is greater, the buffer member filled in the first bending area a1 and the second bending area a2 can effectively relieve the stress applied to the backlight module in the first bending area a1 and the second bending area a 2.

In some embodiments, the material of the buffer component 400 is one of foam and rubber inorganic polymer, and the buffer component can be formed on a common rubber frame by co-injection molding or by adhesion, buckling and the like to form an integral rubber frame, and the rebound performance of the integral rubber frame is superior to that of a common single plastic rubber frame; the buffer member 400 is provided with a light shielding adhesive 200 on a side away from the bottom, and the light shielding adhesive is attached to the display panel. The invention absorbs the panel bending stress at the bending position through the buffer part, enhances the product reliability and is more beneficial to passing mechanical tests such as drop test, click test and the like.

In some embodiments, as shown in fig. 2, first inflection zone a1 is filled with first cushioning component 410 and second inflection zone a2 is filled with second cushioning component 420. The first and

second buffer members

410 and 420 are symmetrically disposed about a center perpendicular line of the backlight assembly.

In some embodiments, as shown in fig. 3, fig. 3 is a schematic cross-sectional view of the backlight module at a line M-M', and in the flat area a2, the backlight module includes an outer frame 100, the outer frame includes a bottom 110 and a side 120, the side is filled with a rubber frame 300, the side 120 and the rubber frame are filled with a light shielding adhesive 200, and in the second bending area a2, the rubber frame 300 is filled with a buffer member 420.

In some embodiments, the height of the upper edge of the cushioning component 400 is 0.01 mm to 0.1 mm lower than the height of the rubber frame 300 of the flat area a3, which increases the cushioning space of the cushioning component 420.

As shown in fig. 4, in some embodiments, the buffering component 400 is disposed in the middle of the rubber frame, the thickness of the buffering component 400 is one third to one half of the thickness of the rubber frame 300, and the distance from the upper edge of the buffering component 400 to the upper edge of the rubber frame is equal to the distance from the lower edge of the rubber frame 300 to the lower edge of the buffering component 400.

In some embodiments, the cushioning component 400 is disposed on a side of the side portion 120 away from the bottom portion 110.

In some embodiments, the buffer member 400 is disposed on a side of the side portion 120 close to the bottom portion 110, and the adhesive frame 300 is disposed on a side of the buffer member 400 for reinforcing the backlight module.

In some embodiments, the height of the upper edge of the cushioning component 400 is lower than the height of the rubber frame of the non-bending area of the side part, so that the cushioning space of the cushioning component is increased.

In some embodiments, the cushioning member 400 is disposed inside the frame, and the outer edges of the cushioning member are equidistant from the outer edges of the frame.

As shown in fig. 5, in some embodiments, the number of the buffer members 400 is four, the first bending area a1 includes a first buffer member 410 and a third buffer member 430, the second bending area a2 includes a second buffer member 420 and a fourth buffer member 440, the four buffer members are symmetrically disposed about the center of the backlight module, and the four buffer members are disposed at stress concentration positions at four corners of the bending area, so that partial stress can be absorbed in a concentrated manner to generate a better buffer effect.

In some embodiments, the cushioning component 400 is disposed on a side of the side portion away from the bottom portion.

In some embodiments, the height of the upper edge of the buffer member 400 is 0.01 mm to 0.1 mm lower than the height of the side flat area frame, so as to provide a certain buffer space for the backlight module.

As shown in fig. 6, after testing, it is found that the stress concentration ranges are in the portion of the first bending region a1 close to the flat region A3 and the portion of the second bending region a2 close to the flat region A3, therefore, the first buffer member 410 and the third buffer member 430 are disposed in the portion of the first bending region a1 close to the flat region A3, the second buffer member 420 and the fourth buffer member 440 are disposed in the portion of the second bending region a2 close to the flat region A3, the number of the buffer members is four, the four buffer members are symmetrically disposed about the center of the backlight module, and by disposing the four buffer members in the stress concentration positions at the four corners of the bending regions, partial stress can be absorbed in a concentrated manner to produce a better buffer effect, and at the same time, by disposing the buffer members only at the four corners, a better shape of the bezel can be achieved.

In some embodiments, the width of the cushioning component 400 is one-half to one-third of the width of the inflection region.

In some embodiments, the height of the upper edge of the cushioning component 400 is lower than the height of the flat area a3 rubber frame 300.

In some embodiments, as shown in fig. 4, the buffering component 400 is disposed in the middle of the rubber frame, the thickness of the buffering component 400 is one third to one half of the thickness of the rubber frame 300, and the distance from the upper edge of the buffering component 400 to the upper edge of the rubber frame is equal to the distance from the lower edge of the rubber frame 300 to the lower edge of the buffering component 400.

In some embodiments, the height of the upper edge of the cushioning component 400 is lower than the height of the non-bent portion rubber frame of the side portion.

In some embodiments, as shown in fig. 7, the flat area a2 includes at least two side portions, the side portions are uniformly disposed in the flat area a2, and the distance between the side portions is uniform.

In some embodiments, the cushioning members are spaced laterally in the first and second inflection zones a1 and a2, the cushioning members are spaced equally in the first and second inflection zones a1 and a2, and the cushioning members are spaced between 2 mm and 2 cm.

In some embodiments, the buffering component 400 is disposed inside the rubber frame, and the outer edge of the buffering component 400 is equidistant from the outer edge of the rubber frame.

In some embodiments, as shown in fig. 5, the number of the buffer members is four, the first bending area a1 includes a first buffer member 410 and a third buffer member 430, the second bending area a2 includes a second buffer member 420 and a fourth buffer member 440, the four buffer members are symmetrically disposed about the center of the backlight module, and the four buffer members are disposed at stress concentration positions at four corners of the bending area, so that partial stress can be absorbed in a concentrated manner to generate a better buffer effect.

The invention also provides a display module, which comprises:

backlight unit, including first bending zone, second bending zone and set up the flat district between first bending zone and second bending zone, backlight unit includes: the outer frame comprises a bottom and a side part, the side part extends along the edge of the bottom in the direction far away from the bottom, the bottom and the side part enclose to form a receiving groove, and the receiving groove is used for receiving the backlight source and the optical film; the rubber frame is arranged around the side part; the light shielding glue is positioned on one side, far away from the bottom, of the glue frame, and at least one buffer part is arranged in the first bending area and the second bending area on the side part;

the liquid crystal display panel is arranged at the bottom of the backlight module, is far away from one side of the bottom, and is connected with the backlight module through the light shielding glue, and the side part of the backlight module surrounds the liquid crystal display panel, so that the phenomenon that the display module is easy to fall off at the position where stress is concentrated is effectively relieved.

The invention provides a backlight module, which comprises an outer frame, a rubber frame, a shading rubber and a buffer component, wherein the rubber frame is arranged on the outer frame; the frame includes bottom and lateral part, glues the frame and sets up around the lateral part, and the shading is glued and is set up in the one side of gluing the frame and keeping away from the bottom, and the lateral part includes first bending zone, second bending zone and sets up the flat district in first bending zone and second bending zone, is provided with a buffer unit at least in first bending zone and second bending zone. According to the invention, the buffering component is arranged at the position where the panel stress is concentrated, so that the stress concentration phenomenon generated when the panel is bent is effectively relieved, and the reliability of bending the panel is improved.

The backlight module provided by the embodiment of the invention is described in detail above, and the principle and the implementation of the invention are explained in the text by applying specific examples, and the description of the above embodiment is only used to help understanding the technical scheme and the core idea of the invention; 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A backlight module, comprising:

the rubber frame is arranged on the outer frame;

the shading glue is arranged on the glue frame;

the backlight module comprises a backlight module, a frame, a bending part, a non-bending part, a bending stress buffering part and a frame cover, wherein the bending part and the non-bending part are arranged on at least one side of the backlight module, the frame is made of deformable materials, the frame bending part and the non-bending part of the frame are provided with a rubber frame, the rubber frame corresponds to the bending part, at least one bending stress buffering part is arranged on the bending part, the bending stress buffering part is arranged inside the rubber frame, the distance from the upper edge of the rubber frame to the lower edge of the bending stress buffering part is equal to the distance from the lower edge of the rubber frame to the upper edge of the rubber frame.

2. The backlight module according to claim 1, wherein the thickness of the bending stress buffering member is one third to one half of the thickness of the non-bending adhesive frame.

3. The backlight module according to claim 1, wherein the back plate module comprises a first bending region and a second bending region, the first bending region and the second bending region are symmetrically arranged about a central line of the backlight module, the first bending region comprises at least one bending stress buffering component, and the second bending region comprises at least one bending stress buffering component.

4. The backlight module according to claim 3, wherein the first bending region comprises a first bending stress buffering member and a second bending stress buffering member, the second bending region comprises a third bending stress buffering member and a fourth bending stress buffering member, the first bending stress buffering member and the second bending stress buffering member, the third bending stress buffering member and the fourth bending stress buffering member are symmetrically arranged with respect to a central vertical line of the backlight module, and the first bending stress buffering member and the third bending stress buffering member are symmetrically arranged with respect to the central vertical line of the backlight module.