阅读说明：本技术 导光板、背光模组及显示面板 (Light guide plate, backlight module and display panel ) 是由 李麒麟 田青 于 2020-06-12 设计创作，主要内容包括：本发明公开了一种导光板,所述导光板的一个侧面设为光入射面,远离所述导光板的光入射面的边缘开设至少两排交错设置的通孔,所述通孔包括靠近所述导光板边缘的外侧排孔,以及靠近所述导光板中心的内侧排孔。本发明的导光板因无法膨胀而产生的应力能够通过外侧排孔和内侧排孔的变形进行膨胀压力释放,避免了导光板的变形、或压损光源,从而提高导光板耐高温高湿的能力。(The invention discloses a light guide plate, wherein one side surface of the light guide plate is set as a light incident surface, at least two rows of through holes which are arranged in a staggered mode are arranged on the edge, far away from the light incident surface of the light guide plate, of the through holes, and each through hole comprises an outer row hole close to the edge of the light guide plate and an inner row hole close to the center of the light guide plate. The stress generated by the light guide plate due to the incapability of expanding can be released by the expansion pressure through the deformation of the outer row holes and the inner row holes, so that the deformation or pressure loss of the light guide plate to a light source is avoided, and the high-temperature and high-humidity resistance of the light guide plate is improved.)

1. The utility model provides a light guide plate, its characterized in that, a side of light guide plate is established to the light incident surface, keeps away from the edge of the light incident surface of light guide plate sets up two rows at least crisscross through-holes that set up, the through-hole is including being close to the outside round hole at light guide plate edge, and be close to the inboard round hole at light guide plate center.

2. The light guide plate according to claim 1, wherein the outer rows and the inner rows are uniformly spaced apart from each other, and the diameter of the outer rows is larger than that of the inner rows.

3. The light guide plate according to claim 2, wherein the inner rows of holes each have an aperture diameter less than or equal to a spacing between adjacent outer rows of holes.

4. The light guide plate according to claim 1, wherein the light guide plate has a rectangular shape including a first side surface, a second side surface, a third side surface and a fourth side surface, the light incident surface is the first side surface of the light guide plate, the side away from the first side surface is the second side surface, and the through hole is opened near the second side surface of the light guide plate.

5. The light guide plate according to claim 4, wherein at least two rows of the through holes are disposed in a staggered manner near the edges of the third side and the fourth side.

6. The light guide plate according to claim 4, wherein the second, third and fourth side surfaces are respectively provided with side reflective sheets for reflecting light.

7. A backlight module comprising the light guide plate according to any one of claims 1 to 6, and an optical film bonded to a surface of the light guide plate, wherein the optical film is provided with a light shielding portion covering the through hole.

8. The backlight module according to claim 7, wherein the shape of the light shielding portion corresponds to the through hole, and the diameter of the light shielding portion is greater than or equal to the aperture of the through hole.

9. The backlight module according to claim 8, wherein the diameter of the light shielding portion is 0.1-0.4mm larger than the aperture of the through hole.

10. The backlight module according to claim 7, further comprising a back plate for accommodating the light guide plate, the optical film and the light source, wherein the back plate comprises a bottom surface and a sidewall extending from an edge of the bottom surface, and the light guide plate is attached to the sidewall of the back plate.

11. A display panel comprising the backlight module according to any one of claims 7-10.

Technical Field

The invention relates to the technical field of display, in particular to a display device.

Background

With the application and development of liquid crystal displays, the displays are more and more widely applied and the positions of use of the displays are more and more extensive, for example, in high-temperature and high-humidity areas and the like, the reliability requirement of customers on products is higher and higher, and in order to meet the reliability requirement of the products, the reliability standard of a backlight source is also improved during design. In the backlight structure, the expansion of the light guide plate in a high-temperature and high-humidity environment is a main factor affecting the reliability, and therefore, it is important to improve the reliability of the light guide plate in the environment.

Disclosure of Invention

An object of the present invention is to provide a light guide plate which is less likely to be deformed by expansion.

Another objective of the present invention is to provide a backlight module.

It is still another object of the present invention to provide a display panel.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the present invention provides a light guide plate, where one side surface of the light guide plate is a light incident surface, and at least two rows of through holes arranged in a staggered manner are formed in an edge of the light incident surface away from the light guide plate, where the through holes include an outer row of holes close to the edge of the light guide plate and an inner row of holes close to the center of the light guide plate.

Preferably, the outer side row holes and the inner side row holes are uniformly arranged at intervals, and the aperture of the outer side row holes is larger than that of the inner side row holes.

Preferably, the aperture of each inner row of holes is smaller than or equal to the distance between adjacent outer rows of holes.

Preferably, the light guide plate is rectangular and comprises a first side face, a second side face, a third side face and a fourth side face, the light incident face is the first side face of the light guide plate, the side far away from the first side face is the second side face, and the through hole is close to the second side face of the light guide plate.

Preferably, at least two rows of the through holes which are arranged in a staggered manner are also formed on the edges close to the third side surface and the fourth side surface respectively.

Preferably, the second side surface, the third side surface and the fourth side surface are respectively provided with a side reflective sheet for reflecting light.

In a second aspect, the present invention provides a backlight module, which includes the above-mentioned light guide plate, and an optical film bonded to the surface of the light guide plate, wherein the optical film is provided with a light shielding portion covering the through hole.

Optionally, the shape of the light shielding portion corresponds to the through hole, and the diameter of the light shielding portion is greater than or equal to the aperture of the through hole.

Optionally, the diameter of the light shielding portion is 0.1-0.4mm larger than the aperture of the through hole.

Optionally, the backlight module further includes a back plate for accommodating the light guide plate, the optical film and the light source, the back plate includes a bottom surface and a sidewall extending from an edge of the bottom surface, and the light guide plate is attached to the sidewall of the back plate.

In a third aspect, the present invention provides a display panel including the backlight module.

The invention has the following beneficial effects:

the stress generated by the light guide plate due to the incapability of expanding can be released by the expansion pressure through the deformation of the outer row holes and the inner row holes, so that the deformation or pressure loss of the light guide plate to a light source is avoided, and the high-temperature and high-humidity resistance of the light guide plate is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a schematic structural view of a light guide plate according to the present invention.

Fig. 2 is a schematic structural diagram of a backlight module according to the present invention.

FIG. 3 is a schematic structural diagram of an optical film in a backlight module according to the present invention.

Detailed Description

In order to make the technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In one embodiment of the light guide plate of the present invention shown in fig. 1, one side of the light guide plate 100 is a light incident surface, and two rows of through holes are disposed at an edge of the light guide plate away from the light incident surface, where the through holes include an outer row of holes near the edge of the light guide plate and an inner row of holes near the center of the light guide plate.

Specifically, the light guide plate 100 in this embodiment is rectangular and includes a transparent material for refracting light, and includes four sides, namely a first side 101, a second side 102, a third side 103, and a fourth side 104, where the first side 101 is a light incident surface, and the light source is disposed to be attached to the first side 101. The light guide plate 100 may include a transparent polymer resin such as polycarbonate, polymethylmethacrylate, or the like.

The light guide plate 100 is disposed under the display panel to guide light emitted from the light source to the display panel. The light guide plate 100 overlaps at least a display region of the display panel when viewed in a plan view. The light guide plate 100 includes an upper surface, a lower surface opposite to the upper surface, and four side surfaces connecting the upper surface and the lower surface. The first side surface 101 of the light guide plate 100 may be a light incident surface into which light emitted from a light source is incident, and the upper surface of the light guide plate 100 may be a light exit surface from which light guided by the light guide plate 100 exits and reaches the display panel.

Two rows of through holes are opened at the edge near the second side surface 102 of the light guide plate 100, and the through holes include an outer row of holes 105 near the edge of the light guide plate 100 and an inner row of holes 106 near the center of the light guide plate 100. The outer row holes 105 and the inner row holes 106 are formed by arranging a plurality of through holes in a row, and the outer row holes 105 and the inner row holes 106 are arranged in a staggered manner.

When the light guide plate 100 is expanded by heat generated from the light source or heat of the external environment, the light guide plate 100 cannot be expanded due to the edge of the light guide plate 100 being pressed against the edge of the back plate, thereby causing deformation of the light guide plate 100 or damaging the light source due to pressure applied to the light source by the expansion of the light guide plate 100. The stress generated by the light guide plate 100 of the invention due to the failure of expansion can be released by the expansion pressure through the deformation of the outer row holes 105 and the inner row holes 106, thereby avoiding the deformation of the light guide plate 100 or the pressure loss of the light source, and improving the high temperature and high humidity resistance of the light guide plate.

Referring to fig. 1 again, in the embodiment, the through holes of the outer row 105 are equally spaced, the through holes of the inner row 106 are equally spaced, and the aperture of the inner row 106 is smaller than that of the outer row 105.

In an embodiment, the aperture of the inner row of holes 106 is smaller than or equal to the distance between two adjacent through holes of the outer row of holes 105, and because the inner row of holes 106 and the outer row of holes 105 are arranged in a staggered manner, this structure can reduce the distance between the inner row of holes 106 and the outer row of holes 105, so that the inner row of holes 106 is closer to the outer row of holes 105, which is beneficial to reducing the area occupied by the through holes on the light guide plate 100.

In this embodiment, two rows of through holes arranged in a staggered manner are also formed at the edges of the third side surface 103 and the fourth side surface 104, which are close to the light guide plate 100, of the light guide plate 100, at this time, the through holes are formed at the edges of the three side surfaces of the light guide plate 100, and the expansion pressure in the three directions can be released through the through holes of the light guide plate, so that the deformation resistance of the light guide plate 100 is further improved.

The outer row of holes 105 and the inner row of holes 106 are respectively provided in a circular shape and may be formed through a drilling process.

The second side 102, the third side 103 and the fourth side 104 of the light guide plate 100 are further bonded with a side reflector 107, and the side reflector 107 can reflect light incident on the edge of the light guide plate 100 back to the light guide plate, so that all light incident on the light guide plate from a light source is emitted from a light emitting surface of the light guide plate, thereby improving the light efficiency.

As shown in fig. 2, the present invention further discloses a backlight module, which includes the light guide plate 100, the optical film 200, the light source 300 and the back plate 400. The back plate 400 includes a bottom surface and a sidewall extending from an edge of the bottom surface, the bottom surface and the sidewall forming a receiving space in which the light guide plate 100, the light source 300, and the optical film 300 are received. The optical film material 200 is attached to the light emitting surface of the light guide plate 100, and the light source 300 is attached to the light incident surface of the light guide plate 100.

As shown in fig. 3, the optical film 200 in this embodiment further includes light shielding portions 201, the light shielding portions 201 correspond to the through holes of the light guide plate 100 one by one, and the light shielding portions 201 may be circular and formed on the surface of the optical film by a printing process.

Light emitted by the light source 300 enters the light guide plate from the light incident surface of the light guide plate 100 and sequentially passes through the side walls of the inner row of holes 106 and the outer row of holes 105 to irradiate the side edge reflector 107, because the current machining and punching process cannot ensure that the side walls of the through holes are completely smooth and flat, incomplete smooth surfaces exist on the side walls of the through holes, and the edge of the through hole of the light guide plate can have a bright edge phenomenon, that is, the brightness of the edge of the through hole can be greater than that of other positions of the light guide plate. Therefore, the light shielding portion 201 of the optical film material 200 shields the inner row holes 106 and the outer row holes 105, and the occurrence of the bright edge phenomenon is reduced.

The area of the light shielding part 201 is larger than that of the through hole of the light guide plate 100, and in one embodiment, the diameter of the light shielding part 201 is 0.1-0.4mm larger than the aperture of the outer row of holes 105 and the inner row of holes 106, respectively.

The invention also discloses a display panel which comprises the backlight module.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.