CN110161615A - Light conducting plate structure, backlight module and display device - Google Patents

Abstract

A light guide plate structure, a backlight module and a display device, wherein the light guide plate structure includes a body and a frame. The body includes a first surface, a second surface and at least one light incident surface, the first surface and the second surface are spaced apart, the light incident surface connects the first surface and the second surface, and the light incident surface is used to receive light incident into the body; The body also includes a through hole penetrating the first surface and the second surface. The frame is received in the through hole. The outer edge surface of the frame at least includes a first surface and a second surface. The first surface is closer to the light incident surface than the second surface, and the light reflectivity of the first surface is smaller than the second surface. light reflectivity. The present invention further proposes a backlight module and a display device including the above light guide plate structure.

Description

Light guide plate structure, backlight module and display device

technical field

A light guide plate structure, in particular to a light guide plate with a frame. The invention also relates to a backlight module and a display device with the structure of the light guide plate.

Background technique

With the advancement of science and technology, the development of smart mobile devices continues to advance. For example, smart phones have developed from small screens to large screens. Coupled with the combination of camera functions, photography, selfie and real-time live broadcast activities are flourishing, so the device of the lens is very important.

For the industry, how to maintain the aesthetic appearance and high screen-to-body ratio of smart mobile devices is an important issue. In order to meet the above requirements, it is necessary to dig holes in the internal display area for lens configuration in smart mobile devices.

However, since the backlight module mainly uses the light guide plate to guide light, when the light passes in the light guide plate, a bright area will be generated on the side of the lens outer frame facing the light source, and a dark area will be generated on the side of the lens outer frame facing away from the light source. In this way, the surrounding brightness of the hole will be uneven, resulting in the problem of different brightness of the overall picture.

Contents of the invention

An embodiment of the invention provides a light guide plate structure, including a body and a frame.

The body includes a first surface, a second surface and at least one light-incident surface, the first surface and the second surface are spaced apart, the light-incident surface connects the first surface and the second surface, and the light-incidence surface is used to receive light incident into the body; The body also includes a through hole passing through the first surface and the second surface.

The frame body is accommodated in the through hole, and the outer edge surface of the frame body includes at least a first surface and a second surface, wherein the first surface faces the light incident surface, and the light reflectance of the first surface is smaller than the light reflection of the second surface Rate.

For the light guide plate structure described above, in one embodiment, the frame body further includes a first block and a second block, and the first block and the second block are combined to form a frame body; wherein the outer edge of the first block The surface is the first surface, and the outer edge surface of the second block is the second surface.

According to the structure of the light guide plate mentioned above, in one embodiment, the first block and the second block are made of different materials respectively.

The above-mentioned light guide plate structure, in an embodiment, further includes a first block combined with an outer edge surface of the frame body to form a first surface.

The light guide plate structure described above, in an embodiment, further includes a second block combined with the outer edge surface of the frame to form the second surface.

The light guide plate structure described above, in one embodiment, further includes a first coating layer coated on the first surface.

The light guide plate structure described above, in one embodiment, further includes a second coating layer coated on the second surface.

The light guide plate structure described above, in one embodiment, further includes a first coating layer and a second coating layer coated on the first surface and the second surface.

The present invention further proposes a structure of a light guide plate according to an embodiment, which includes a body and a frame.

The body includes a first surface, a second surface and at least one light-incident surface, the first surface and the second surface are spaced apart, the light-incident surface connects the first surface and the second surface, and the light-incidence surface is used to receive light incident into the body; The body also includes a through hole passing through the first surface and the second surface.

The frame body is accommodated in the through hole, and the outer edge surface of the frame body defines a first longitudinal centerline and an opposite second longitudinal centerline, the first longitudinal centerline is close to the light incident surface, and the second longitudinal centerline is away from the light incident surface ; Wherein the light reflectance of the outer edge surface of the frame gradually increases from the first longitudinal centerline to the second longitudinal centerline.

The disclosure also proposes a backlight module according to an embodiment, which includes the above-mentioned light guide plate structure, a light source, at least one optical film and a reflective film.

The light source is set toward the light-incident surface for projecting light on the light-incident surface; the optical film is set on the first surface of the body to adjust the light output on the first surface, and the optical film contains through holes corresponding to the through holes, and the frame extends It is accommodated in the through hole; the reflective diaphragm is arranged under the second surface and includes an opening corresponding to the through hole, and the frame body is extended and accommodated in the opening.

The disclosure also proposes a display device according to an embodiment, which includes a casing, the above-mentioned backlight module, and a liquid crystal panel.

The housing has an accommodating space and a window communicating with the accommodating space; the backlight module is arranged in the accommodating space, and the first surface faces the window; the liquid crystal panel is arranged in the accommodating space and covers the window.

The above display device, in an embodiment, further includes a lens, the frame body further includes a hole, and the lens is disposed in the hole.

Through one or more of the above-mentioned embodiments, because the frame body has surfaces with different light reflectivity, when light is injected into the body of the light guide plate structure, the surface of the frame body can adjust the brightness of the light, so that the brightness of the area of the body close to the first surface is reduced. And the brightness of the area of the main body close to the second surface is increased, effectively improving the light uniformity of the overall picture.

Description of drawings

FIG. 1 is a partial schematic view of the appearance of an embodiment of the structure of the light guide plate of the present invention.

FIG. 2 is a schematic cross-sectional view of an embodiment of the backlight module of the present invention.

FIG. 3 is a schematic view of the appearance of an embodiment of the frame in the structure of the light guide plate of the present invention.

FIG. 4A is a schematic view of the appearance of an embodiment of the frame in the structure of the light guide plate of the present invention.

FIG. 4B is a schematic view of the appearance of an embodiment of the frame in the structure of the light guide plate of the present invention.

FIG. 4C is a schematic view of the appearance of an embodiment of the frame in the structure of the light guide plate of the present invention.

FIG. 4D is a schematic view of the appearance of an embodiment of the frame in the structure of the light guide plate of the present invention.

FIG. 5 is a schematic view of the appearance of an embodiment of the frame in the structure of the light guide plate of the present invention.

FIG. 6 is an exploded schematic diagram of an embodiment of the display device of the present invention.

Explanation of reference signs:

1 Light guide plate structure

11 Body

111 First side

112 Second side

113 light incident surface

114 through hole

12 frames

12a first surface

12b Second surface

121 First block

122 second block

123 first coating layer

124 second coating layer

125 First longitudinal centerline

126 Second longitudinal centerline

127 first block

128 second block

129 holes

2 backlight module

21 light source

22 Optical film

221 upper diffuser

222 Enhancement film

223 lower diffuser

224 through holes

23 reflective film

231 opening

3 display device

31 housing

311 storage space

312 windows

32 LCD panel

321 hole

322 lens

L light

Detailed ways

Please refer to FIG. 1 and FIG. 2 , which are respectively a partial schematic view of the appearance of an embodiment of the light guide plate structure 1 of the present invention and a schematic cross-sectional view of an embodiment of the backlight module of the present invention. The light guide plate structure 1 includes a body 11 and a frame 12 . The main body 11 includes a first surface 111, a second surface 112 and at least one light-incident surface 113 (see FIG. 2 ). The first surface 111 and the second surface 112 are separated from each other. The two surfaces 112 and the light-incident surface 113 are used to receive the light L to enter the main body 11 . The main function of the light guide plate structure 1 is to guide the projection direction of the light L, so as to improve the luminance of the applied backlight module and control the brightness uniformity. In some embodiments, the material of the light guide plate is, for example, PMMA (acrylic resin), but not limited thereto.

The body 11 further includes a through hole 114 passing through the first surface 111 and the second surface 112 . The frame body 12 can be accommodated in the through hole 114, and the outer edge surface of the frame body 12 includes at least a first surface 12a and a second surface 12b, wherein the first surface 12a is closer to the light incident surface 113 than the second surface 12b, that is , the first surface 12a faces the light incident surface 113, and the second surface 12b is located farther from the light incident surface 113, and the light reflectance of the first surface 12a is smaller than that of the second surface 12b. That is to say, the frame body 12 has surfaces with different light reflectivity (such as the first surface 12a and the second surface 12b), wherein the surface with a smaller light reflectivity is facing the light-incident surface 113, so that when the light L enters the main body 11 and guided to the frame body 12, the brightness of light around the frame body 12 can be adjusted to reduce the brightness of the area of the body 11 close to the first surface 12a, and increase the brightness of the area of the body 11 close to the second surface 12b, effectively The light L is uniformly projected in the main body 11 .

In addition, the frame body 12 may be circular, rectangular or other geometric shapes, which are not limited in the present invention. The frames with the first surface 12a facing the light incident surface 113 having low light reflection characteristics and the second surface 12b facing away from the light incident surface 113 having high light reflection characteristics are all within the protection scope of the present invention.

Please refer to FIG. 3 , which is a schematic appearance diagram of an embodiment of the frame body 12 in the light guide plate structure 1 of the present invention. In this embodiment, the frame body 12 also includes a first block body 121 and a second block body 122, the first block body 121 and the second block body 122 are combined to form the frame body 12; wherein the outer edge surface of the first block body 121 is the first surface 12a, and the outer edge surface of the second block 122 is the second surface 12b. That is to say, the frame body 12 can be composed of two or more blocks, and the outer edge surfaces of these blocks have different light reflectances.

In some embodiments, the first block 121 and the second block 122 can be made of different materials, so that the difference in light reflectance between the first surface 12 a and the second surface 12 b can be achieved.

Please refer to FIG. 4A , which is a schematic view showing the appearance of an embodiment of the frame body 12 in the light guide plate structure 1 of the present invention. In this embodiment, the light guide plate structure 1 further includes a first block 127 combined with the outer edge surface of the frame body 12 to form the first surface 12a. The materials of the first block 127 and the frame body 12 can be the same or different, and the purpose is that the light reflectance of the first surface 12a formed by the first block 127 is different from that of the second surface 12b of the frame body 12 to improve The problem that light L is projected on the main body 11 is that the area facing the first surface 12 a and the area facing the second surface 12 b are different in brightness and darkness.

Please refer to FIG. 4B , which is a schematic appearance diagram of an embodiment of the frame body 12 in the light guide plate structure 1 of the present invention. The difference from the embodiment shown in FIG. 4A is that the light guide plate structure 1 further includes a second block 128 combined with the outer edge surface of the frame body 12 to form the second surface 12b. The materials of the second block 128 and the first block 127 can be the same or different, and the purpose is to cause the light reflectivity of the first surface 12a and the second surface 12b to be different, so as to improve the above-mentioned problems.

In the above, whether the light guide plate structure 1 includes the first block 127 or the second block 128 , in one embodiment, it is completed by double plastic injection molding (Over-Molding).

In some embodiments, the first block 127 and the second block 128 are combined to form the frame body 12, and the means of combining, for example, fixing the first block 127 and the second block 128 in a bonding manner to form the frame body 12 , the structure of the frame body 12 is similar to the embodiment shown in FIG. 3 .

Please refer to FIG. 4C , which is a schematic appearance diagram of an embodiment of the frame body 12 in the light guide plate structure 1 of the present invention. In this embodiment, the light guide plate structure 1 further includes a first coating layer 123 coated on the first surface 12a. The first coating layer 123 is, for example, a glue paint layer. The light reflectance of the first surface 12 a is changed by selecting the type of glue coating, so as to be different from the light reflectance of the second surface 12 b.

In contrast, in other embodiments, there is no first coating layer 123 on the first surface 12a. However, the light guide plate structure 1 includes a second coating layer 124 coated on the second surface 12b. The second coating layer 124 is, for example, a glue layer, which is different from the light reflectance of the first surface 12a, so that the light reflectance of the first surface 12a is lower than that of the second surface 12b.

Please refer to FIG. 4D , which is a schematic appearance diagram of an embodiment of the frame body 12 in the light guide plate structure 1 of the present invention. In this embodiment, the light guide plate structure 1 includes a first coating layer 123 and a second coating layer 124 coated on the first surface 12a and the second surface 12b respectively.

In other words, the present invention does not limit the first surface 12a or the second surface 12b to be coated with a coating layer, and the difference between the light reflectance of the first surface 12a and the light reflectance of the second surface 12b is what the present invention wants scope of protection.

Please refer to FIG. 5 , which is a schematic appearance diagram of an embodiment of the frame body 12 in the light guide plate structure 1 of the present invention. Different from the above-mentioned embodiment, in the embodiment shown in FIG. the light surface 113 , and the second longitudinal centerline 126 is away from the light incident surface 113 . The light reflectance of the outer surface of the frame body 12 gradually increases from the first longitudinal centerline 125 to the second longitudinal centerline 126 .

That is to say, the light reflectance of the outer edge surface of the frame body 12 increases gradually from the first longitudinal centerline 125 to the second longitudinal centerline 126 . In this way, since the first longitudinal centerline 125 is close to the light-incident surface 113, the input amount of light L is large, but the light reflectivity of the area is small, and the input amount of light L can be adjusted to reduce the brightness; relatively, the second longitudinal centerline 126 Far from the light-incident surface 113 , the light reflectance of this region is high, which can improve the brightness, so that the brightness of the overall light guide sheet structure is uniform.

Please refer to FIG. 2 again, the backlight module 2 can use any light guide plate structure 1 shown above. The backlight module 2 further includes a light source 21 , at least one optical film 22 and a reflective film 23 .

The light source 21 is disposed toward the light-incident surface 113 for projecting light L on the light-incident surface 113 . The optical film 22 includes, for example, an upper diffuser 221, a brightness enhancement film 222, and a lower diffuser 223, which are arranged on the first surface 111 of the body 11 to adjust the light output from the first surface 111, and the optical film 22 includes holes corresponding to the through holes 114. The through hole 224 , the frame body 12 is extended and received in the through hole 224 . The reflective film 23 is disposed under the second surface 112 and includes an opening 231 corresponding to the through hole 114 , and the frame body 12 is extended and received in the opening 231 .

Because the backlight module 2 uses the light guide plate structure 1 of any one of the above-mentioned embodiments, when the light source 21 lights up, the backlight module 2 can exhibit a phenomenon of uniform brightness.

Please refer to FIG. 6 , which is an exploded schematic view of an embodiment of the display device 3 of the present invention. The display device 3 includes a casing 31 , the aforementioned backlight module 2 and a liquid crystal panel 32 . The display device 3 is, for example, a flat screen.

The housing 31 has an accommodating space 311 and a window 312 communicating with the accommodating space 311 . The backlight module 2 is disposed in the accommodating space 311 , and the first surface 111 faces the window 312 . The liquid crystal panel 32 is disposed in the accommodating space 311 and covers the window 312 . The liquid crystal panel 32 includes an opening 321 corresponding to the frame body 12 , and the frame body 12 passes through the through hole 224 and is received in the hole 321 .

The display device 3 has the above-mentioned light guide plate structure 1 inside, so the light reflectance of the first surface 12a and the second surface 12b of the frame body 12 is different, and the brightness of the receiving area between the frame body 12 and the main body 11 can be adjusted to make the display device 3 The picture shows a phenomenon of uniform brightness.

In this embodiment, the display device 3 further includes a lens 322 , the frame body 12 further includes a hole 129 , and the lens 322 is disposed in the hole 129 of the frame body 12 and fixed to the through hole 114 .

In the light guide plate structure provided by one or more embodiments of the present invention, the frame body has surfaces with different light reflectances. When light is injected into the body of the light guide plate structure, the surface of the frame body can adjust the brightness of the light, so that the light through the body can be adjusted. The brightness of the area where the hole is close to the light source is reduced, and the brightness of the area away from the light source is increased, effectively improving the overall brightness of the screen.

In addition, for the backlight module and the display device having the structure of the light guide plate in one or more of the above embodiments, it also has the effect of light guide symmetry.

Claims (12)

1. A light guide plate structure, comprising: A body, including a first surface, a second surface and at least one light incident surface, the first surface and the second surface are spaced apart, the light incident surface connects the first surface and the second surface, and the light incident surface The light surface is used to receive a light incident into the body; the body also includes a through hole passing through the first surface and the second surface; and A frame is received in the through hole, the outer edge of the frame at least includes a first surface and a second surface, wherein the first surface is closer to the light incident surface than the second surface, and the second surface The light reflectance of one surface is smaller than the light reflectance of the second surface. 2. The light guide plate structure according to claim 1, wherein the frame further comprises a first block and a second block, and the first block and the second block are combined to form the frame; wherein The outer edge surface of the first block is the first surface, and the outer edge surface of the second block is the second surface. 3. The light guide plate structure according to claim 2, wherein the first block and the second block are respectively made of different materials. 4. The light guide plate structure as claimed in claim 1, further comprising a first block combined with an outer edge surface of the frame body to form the first surface. 5. The light guide plate structure as claimed in claim 1, further comprising a second block combined with an outer edge surface of the frame body to form the second surface. 6. The light guide plate structure as claimed in claim 1, further comprising a first coating layer coated on the first surface. 7. The light guide plate structure as claimed in claim 1, further comprising a second coating layer coated on the second surface. 8. The light guide plate structure according to claim 1, further comprising a first coating layer and a second coating layer coated on the first surface and the second surface. 9. A light guide plate structure, comprising: A body, including a first surface, a second surface and at least one light incident surface, the first surface and the second surface are spaced apart, the light incident surface connects the first surface and the second surface, and the light incident surface The light surface is used to receive a light incident into the body; the body also includes a through hole passing through the first surface and the second surface; and A frame body is received in the through hole, the outer edge surface of the frame body defines a first longitudinal centerline and an opposite second longitudinal centerline, the first longitudinal centerline is close to the light incident surface, and the The second longitudinal centerline is far away from the light incident surface; wherein the light reflectance of the outer edge surface of the frame increases gradually from the first longitudinal centerline to the second longitudinal centerline. 10. A backlight module, comprising: The light guide plate structure according to any one of claims 1 to 9; a light source, arranged towards the light-incident surface, for projecting the light on the light-incident surface; At least one optical film is arranged on the first surface of the body to adjust the light output from the first surface, and the at least one optical film includes a through hole corresponding to the through hole, and the frame extends to accommodate the through hole inside the hole; and A reflective film is arranged under the second surface and includes an opening corresponding to the through hole, and the frame is extended and received in the opening. 11. A display device, comprising: A housing with an accommodating space and a window communicating with the accommodating space; The backlight module according to claim 10, arranged in the accommodating space, and the first surface faces the window; and A liquid crystal panel is arranged in the accommodating space and covers the window. The liquid crystal panel includes a hole corresponding to the frame body, and the frame body passes through the through hole and is accommodated in the hole. 12. The display device as claimed in claim 11, further comprising a lens, the frame body further comprising a hole, and the lens is disposed in the hole.