WO2020029668A1

WO2020029668A1 - Backlight module, liquid crystal display module, and electronic device

Info

Publication number: WO2020029668A1
Application number: PCT/CN2019/089814
Authority: WO
Inventors: 陆忠恒
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-08-10
Filing date: 2019-06-03
Publication date: 2020-02-13

Abstract

A backlight module (10), a liquid crystal display module (100) comprising the backlight module (10), and an electronic device (1000). The backlight module (10) comprises a light-enhancing layer (12), a diffusion film (14), a light guide plate (16) and a reflective sheet (18) which are sequentially stacked. The reflective sheet (18) is provided with a first light transmission aperture (184). The first light transmission aperture (184) is configured to be aligned with a functional device (300) disposed at a side of the reflective sheet (18) facing away from the light guide plate (16), such that light emitted by the functional device (300) passes through the first light transmission aperture (184) to exit from the backlight module (10), and/or light entering from outside the backlight module (10) passes through the first light transmission aperture (184) to be received by the functional device (300). The functional device (300) is mounted under a display assembly, thereby increasing the screen-to-body ratio of the electronic device (1000).

Description

Backlight module, liquid crystal display module and electronic device

Priority information

This application claims the priority and rights of patent applications filed with the State Intellectual Property Office of China on August 10, 2018 with patent application numbers of 201810907450.7 and 201821294896.9, and the entire contents of which are hereby incorporated by reference.

Technical field

The present application relates to the field of display technology, and in particular, to a backlight module, a liquid crystal display module, and an electronic device.

Background technique

Electronic devices such as mobile phones with a large screen ratio are increasingly favored by users. In order to increase the screen ratio of the electronic device, functional devices such as a distance sensor and a light sensor may be installed below the display assembly.

Summary of the invention

The application provides a backlight module, a liquid crystal display module and an electronic device.

A backlight module of a liquid crystal display module according to an embodiment of the present application includes a light-increasing layer, a diffusion film, a light guide plate, and a reflection sheet that are sequentially stacked, and the reflection sheet includes a first light-through hole and the first light-through hole. Configured to align with a functional device disposed on the side of the reflective sheet facing away from the light guide plate, so that light emitted by the functional device is emitted to the outside of the backlight module through the first light hole, and / Alternatively, the functional device can receive light incident from the backlight module and passing through the first light-through hole.

The liquid crystal display module according to the embodiment of the present application includes a backlight module and a liquid crystal display screen. The backlight module includes a light-increasing layer, a diffusion film, a light guide plate, and a reflective sheet that are sequentially stacked. The reflective sheet includes a first channel. A light hole, the first light through hole is configured to be aligned with a functional device provided on a side of the reflective sheet facing away from the light guide plate, so that light emitted by the functional device passes through the first light through hole To the outside of the backlight module, and / or to enable the functional device to receive light incident from outside the backlight module and passing through the first through-hole; the liquid crystal display screen is disposed away from the light-increasing layer. One side of the diffusion film.

The electronic device according to the embodiment of the present application includes a backlight module and a functional device. The backlight module includes a light-increasing layer, a diffusion film, a light guide plate, and a reflective sheet that are sequentially stacked. The reflective sheet is provided with a first light-through hole. The functional device is disposed on a side of the reflective sheet facing away from the light guide plate and is aligned with the first light through hole, and the functional device is configured to emit the light through the first light through hole to the outside of the backlight module. Light, and / or receiving light incident from outside the backlight module through the first light hole.

Additional aspects and advantages of the present application will be given in part in the following description, part of which will become apparent from the following description, or be learned through practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

1 is an exploded schematic view of a backlight module according to an embodiment of the present application;

2 to 7 are schematic perspective views of different embodiments of the reflective sheet of FIG. 1;

8 is an exploded view of a backlight module according to another embodiment of the present application;

9 to 11 are exploded views of different embodiments of the light enhancement layer of FIG. 1;

12 and 13 are exploded views of different embodiments of the backlight module of FIG. 1;

14 is a schematic cross-sectional view of a light enhancement layer of the backlight module of FIG. 13;

15 is an exploded view of another embodiment of the backlight module of FIG. 1;

16 is a schematic cross-sectional view of a light-increasing layer of the backlight module of FIG. 15;

17 is an exploded schematic view of another embodiment of the backlight module of FIG. 1;

18 is a schematic perspective view of a diffusion film of the backlight module of FIG. 17;

19 is an exploded schematic view of another embodiment of the backlight module of FIG. 1;

20 and 21 are schematic cross-sectional views of different embodiments of the light guide plate of the backlight module of FIG. 19;

22 and 23 are exploded views of different embodiments of the backlight module of FIG. 1;

24 is a schematic cross-sectional view of the backlight module of FIG. 23;

25 is an exploded schematic view of another embodiment of the backlight module of FIG. 1;

26 to 29 are schematic cross-sectional views of different embodiments of the backlight module of FIG. 25;

30 is an exploded schematic view of a liquid crystal display module according to an embodiment of the present application;

FIG. 31 is an exploded view of another embodiment of the liquid crystal display module of FIG. 30; FIG.

32 is a schematic plan view of an electronic device according to an embodiment of the present application; and

FIG. 33 is a schematic cross-sectional view of the electronic device of FIG. 32.

Explanation of main component symbols:

Backlight module 10, elastic frame 11, light-enhancing layer 12, light-enhancing area 122, second light-passing hole 124, light-transmitting material 1242, first light-enhancing film 126, second light-enhancing film 128, protrusion 129, protrusion 129 ' , Support frame 13, substrate 132, fourth light through hole 1322, side wall 134, receiving space 136, diffusion film 14, light diffusion region 142, third light through hole 144, light transmitting material 1442, light guide plate 16, light guide Point 162, first light guide 164, second light guide 166, reflection sheet 18, reflection area 182, first light hole 184, light transmitting material 1842, backlight 19, liquid crystal display module 100, liquid crystal display 20. Cover plate 30, electronic device 1000, housing 200, and functional device 300.

detailed description

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

In the description of this application, it should be understood that the directions or positions indicated by the terms "center", "thickness", "upper", "lower", "left", "right", "inner", "outer" and the like The relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore It should not be construed as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless specifically defined otherwise.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of this application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, examples of various specific processes and materials are provided in this application, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

Please refer to FIG. 1, a backlight module 10 of a liquid crystal display module 100 (see FIG. 30) according to an embodiment of the present application includes a light-increasing layer 12, a diffusion film 14, a light guide plate 16, and a reflection sheet 18, which are sequentially stacked. The reflection sheet 18 is opened. There is a first light through hole 184, and the first light through hole 184 is configured to be aligned with the functional device 300 provided on the side of the reflective sheet 18 facing away from the light guide plate 16, so that the light emitted by the functional device 300 passes through the first light through hole 184 The light is radiated to the outside of the backlight module 10 and / or causes the functional device 300 to receive the light incident from the outside of the backlight module 10 and passing through the first light hole 184.

Referring to FIG. 7, in some embodiments, the first light-passing hole 184 is filled with a light-transmitting material 1842, and the light-transmittance of the light-transmitting material 1842 is greater than 90%.

Please refer to FIGS. 9 to 11. In some embodiments, the light-enhancing layer 12 includes a first light-enhancing film 126 and a second light-enhancing film 128 laminated on the side of the first light-enhancing film 126 facing the diffusion film 14 (see FIG. 8). At least one of the first light enhancement film 126 and the second light enhancement film 128 is provided with a second light through hole 124.

Please refer to FIG. 12. In some embodiments, the second light-passing hole 124 is filled with a light-transmitting material 1242, and the light-transmittance of the light-transmitting material 1242 is greater than 90%.

Please refer to FIGS. 13 to 14. In some embodiments, a plurality of protrusions 129 are formed on a surface of the light enhancement layer 12 corresponding to the first light-through hole 124, and the plurality of protrusions 129 are arranged in an array.

15 to FIG. 16. In some embodiments, a plurality of protrusions 129 ′ are formed on the surface of the light-enhancing film 12. The light-enhancing layer 12 includes a first light-enhancing region 121 and a second light-enhancing region 122. The first light-through holes 184 are aligned, and the density of the protrusions 129 ′ located in the first light-increasing region 121 is greater than the density of the protrusions 129 ′ located in the second light-increasing region 122.

In some embodiments, in a direction in which the second light-increasing region 122 faces the first light-increasing region 121, the density of the protrusions 129 'located in the second light-increasing region 122 gradually increases.

Referring to FIG. 17, in some embodiments, the diffusion film 14 is provided with a third light-passing hole 144, and the third light-passing hole 144 is aligned with the first light-passing hole 184.

Referring to FIG. 18, in some embodiments, the third light-passing hole 144 is filled with a light-transmitting material 1442, and the light-transmittance of the light-transmitting material 1442 is greater than 90%.

Please refer to FIGS. 19 and 20. In some embodiments, the light guide plate 16 is formed with light guide points 162 arranged in an array. The light guide plate 16 includes a first light guide portion 164 and a second light guide portion 166. The light guide portion 164 is aligned with the first light through hole 184, and the density of the light guide points 162 located at the first light guide portion 164 is greater than the density of the light guide points 162 located at the second light guide portion 166.

Please refer to FIGS. 20 to 21. In some embodiments, in the direction A of the second light guide portion 166 toward the first light guide portion 164, the density of the light guide points 162 located at the second light guide portion 166 gradually increases. Big.

Please refer to FIG. 23 and FIG. 24. In some embodiments, the backlight module 10 further includes an elastic frame 11. The elastic frame 11 surrounds the light enhancement layer 12, the diffusion film 14, the light guide plate 16 and the reflection sheet 18, and the light enhancement layer 12. The diffusion film 14, the light guide plate 16 and the reflection sheet 18 are all fixedly connected to the elastic frame 11.

Please refer to FIG. 25 and FIG. 26. In some embodiments, the backlight module 10 further includes a supporting frame 13. The supporting frame 13 includes a substrate 132 and a side wall 134 extending from an edge of the substrate 132. There is a receiving space 136, and the light-increasing layer 12, the diffusion film 14, the light guide plate 16, and the reflection sheet 18 are all received in the receiving space 136. The substrate 132 is provided with a fourth light-through hole 1322 aligned with the first light-through hole 184.

Please refer to FIGS. 27 to 29. In some embodiments, the fourth light-passing hole 1322 is used to at least partially receive the functional device 300.

Referring to FIGS. 1 and 30, a liquid crystal display module 100 according to an embodiment of the present application includes a backlight module 10 and a liquid crystal display screen 20. The backlight module 10 includes a light-increasing layer 12, a diffusion film 14, a light guide plate 16, and a reflection sheet 18 that are stacked in this order. The reflection sheet 18 is provided with a first light-passing hole 184. The function device 300 on the side of the sheet 18 facing away from the light guide plate 16 is aligned, so that the light emitted by the function device 300 is emitted to the outside of the backlight module 10 through the first light hole 184, and / or so that the function device 300 receives the light from the backlight module. The light incident from outside 10 and passing through the first light-passing hole 184. The liquid crystal display screen 20 is disposed on a side of the light enhancement layer 12 facing away from the diffusion film 14.

Please refer to FIG. 1, FIG. 32, and FIG. 33. An electronic device 1000 according to an embodiment of the present application includes a backlight module 10 and a functional device 300. The backlight module 10 includes a light-increasing layer 12, a diffusion film 14, a light guide plate 16, and a reflective sheet 18 that are stacked in this order. The reflective sheet 18 is provided with a first light-through hole 184. The functional device 300 is disposed on a side of the reflective sheet 18 facing away from the light guide plate 16 and is aligned with the first light-through hole 184. The functional device 300 is configured to emit light to the outside of the backlight module 10 through the first light-through hole 184, and / or The first light through hole 184 receives light incident from the outside of the backlight module 10.

In some embodiments, the functional device 300 includes at least one of a distance sensor, a camera module, a light sensor, and a fingerprint sensor.

The backlight module 10 according to the embodiment of the present application improves the local light transmittance of the backlight module 10 by opening the first light through hole 184, which can reduce the influence of the backlight module 10 on the functional device 300, so that the functional device 300 can be better. The ground emits light to the outside of the backlight module 10 or receives light from the outside of the backlight module 10 through the first light through hole 184, thereby ensuring the normal operation of the functional device 300.

Generally, in order to increase the screen ratio of electronic devices such as mobile phones and tablet computers, functional devices such as distance sensors and light sensors are usually installed below the display module. However, due to the poor light transmission of the display module, The device has a large impact and may not even work properly. Based on this, the embodiments of the present application provide a backlight module 10 that solves the above technical problems.

It can be understood that the first light through hole 184 is aligned with the functional device 300, and the orthographic projection of the first light through hole 184 on the light guide plate 16 may cover the orthographic projection of the functional device 300 on the light guide plate 16.

Specifically, referring to FIG. 2 to FIG. 4, the first light through hole 184 may be located at any position of the reflection sheet 18, and the position of the first light through hole 184 is not limited herein.

In one example, the first light through hole 184 is at the upper right corner of the reflective sheet 18, as shown in FIG. 2; in another example, the first light through hole 184 is at the lower left corner of the reflective sheet 18, as shown in FIG. In another example, the center of the first light through hole 184 coincides with the center of the reflective sheet 18, as shown in FIG. 4.

In addition, the shape of the first light transmitting hole 184 may be any shape such as a circle, an ellipse, a square, a rectangle, a trapezoid, or an irregular polygon, and the shape of the first light transmitting hole 184 is not limited herein.

In addition, referring to FIG. 4 to FIG. 6, the reflective sheet 18 may include one first light through hole 184 or a plurality of first light through holes 184, and the number of the first light through holes 184 is not limited herein.

In the example of FIG. 4, the reflection sheet 18 includes one first light-passing hole 184; in the example of FIG. 5, the reflection sheet 18 includes three first light-passing holes 184; in the example of FIG. 6, the reflection sheet 18 Includes five first light-through holes 184.

Referring to FIG. 1, in some embodiments, the reflection sheet 18 further includes a reflection region 182, and the reflection region 182 is located on the extension of the first light-through hole 184.

In this way, the reflection sheet 18 can play a role of reflecting light through the reflection area 182, so that the light that was originally lost is reused.

In this way, the light transmittance of the first light through hole 184 is greater than the light transmittance of the reflective region 182, so that the functional device 300 can better emit light to the backlight module 10 or receive the backlight module through the first light through hole 184. 10 external light, thereby ensuring the normal operation of the functional device 300.

It should be noted that the light-transmitting material 1842 can be selected according to different functional devices 300. For example, the material of the reflective region 182 is polyethylene terephthalate (PET). When the functional device 300 under the first light-through hole 184 is a light sensor, the light-transmitting material 1842 may be a polymethyl methacrylate. (PMMA); When the functional device 300 under the first light hole 184 is an infrared sensor, the light-transmitting material 1842 may be an IR ink.

Referring to FIG. 8, in some embodiments, the light-enhancing layer 12 is provided with a second light-through hole 124, and the second light-through hole 124 is aligned with the first light-through hole 184.

In this way, the second light-through hole 124 allows the light emitted by the functional device 300 to pass through the light-increasing layer 12 and exit to the backlight module 10, and / or enables the functional device 300 to receive light incident from the outside of the backlight module 10.

In some embodiments, the light-increasing layer 12 further includes a light-increasing region 122, and the light-increasing region 122 is located on the extension of the second light-through hole 124.

In this way, the light-enhancing layer 12 can reflect and refract the light passing through the light-enhancing region 122 through the light-enhancing region 122 to achieve the effect of enhancing light intensity.

In this way, a second light through hole 124 may be selectively formed in the first light enhancement film 126 and the second light enhancement film 128 according to actual needs.

Please note that “at least one of the first light-increasing film 126 and the second light-increasing film 128 includes the second light-passing hole 124” here includes three cases:

Only the first light-enhancing film 126 includes a second light-passing hole 124, as shown in FIG. 9;

Only the second light-increasing film 128 includes a second light-passing hole 124, as shown in FIG. 10;

Each of the first light-enhancing film 126 and the second light-enhancing film 128 includes a second light-through hole 124, and the second light-through hole 124 on the first light-enhancing film 126 is aligned with the second light-through hole 124 on the second light-enhancing film 128. , As shown in Figure 11.

In this way, it is beneficial to increase the light transmittance of the second light through hole 124, so that the functional device 300 can better emit light to or receive light from the outside of the backlight module 10 through the second light through hole 124, Thus, the functional device 300 is guaranteed to work normally.

It can be understood that, in order to make the light enter the human eye as much as possible, the light needs to be emitted as much as possible in the thickness direction of the light enhancement layer 12. However, when the light is emitted from the light-enhancing layer 12, a certain proportion of the light's exit direction deviates greatly from the thickness direction of the light-enhancing layer 12, and this part of the light cannot be used, resulting in a loss, resulting in a relatively bright light output from the display device. low.

Since the light-enhancing layer 12 according to the embodiment of the present application is formed with a plurality of protrusions 129, a part of light having a large deviation from the thickness direction of the light-enhancing layer 12 can be re-entered into other protrusions after exiting from the light-enhancing layer 12. 129, and after the refraction and reflection of the protrusion 129, adjust the exit direction from the light-enhancing layer 12 so that the light exits as much as possible along the thickness direction of the light-enhancing layer 12 to enter the viewing angle of the observer. In this way, the light that was originally lost is reused, thereby improving the light output brightness of the backlight module 10, and further improving the user experience.

In this way, the arrangement of the protrusions 129 'can compensate for the visual difference caused by the opening of the first light through hole 184.

It can be understood that even if the light transmittance of the area of the first light-passing hole 184 is higher than that of the second light-increasing area 122, because the first light-passing hole 184 lacks a reflective structure, users can easily feel the position of the first light-passing hole 184 when viewing The area is darker than the second enhancement area 122, making the user experience poor. The density of the protrusions 129 'of the first light-increasing region 121 is greater than the density of the protrusions 129' of the second light-increasing region 122, which can increase the light guide amount of the first light-increasing region 121 in the thickness direction of the light-enhancing layer 12, thereby increasing the liquid crystal display The amount of light emitted from the area corresponding to the first light through hole 184 of the module 100 can further compensate for the darkening of the first light through hole 184, which is beneficial to reducing the visual discomfort of the user.

In this way, in a direction toward the first light-increasing area 121, the second light-increasing area 122 gradually becomes brighter, thereby making the user more visually comfortable and further improving the user experience. For example, when the liquid crystal display module 100 is working and displaying, the area corresponding to the first light hole 184 of the liquid crystal display module 100 is used as the center, and the brightness of the liquid crystal display module 100 changes from the center to the surrounding display, thereby reducing the liquid crystal Display differences of the display module 100.

In this way, the third light passing hole 144 can reduce or even eliminate the loss of light passing through the diffusion film 14 in the diffusion film 14, thereby further increasing the transmittance of light passing through the first light passing hole 184.

In some embodiments, the diffusion film 14 further includes a light diffusion region 142, and the light diffusion region 142 is located on the epitaxy of the third light through hole 144.

In this way, the diffusion film 14 can diffusely reflect the light passing through the light diffusion region 142 through the light diffusion region 142, thereby achieving the effect of uniform light.

In this way, it is beneficial to increase the light transmittance of the third light through hole 144, so that the functional device 300 can better emit light to or receive light from the outside of the backlight module 10 through the third light through hole 144. Thus, the functional device 300 is guaranteed to work normally.

In this way, the way of setting the light guide points 162 can compensate for the visual difference caused by the high light transmittance of the first light through hole 184.

It can be understood that even though the light transmittance of the first light hole 184 is higher than that of the reflection area 182, because the first light hole 184 lacks a reflective structure, the user can easily feel that the first light hole 184 is more than the reflection area 182 when observing. Dark, making the user experience poor. The density of the light guide points 162 of the first light guide portion 164 is greater than the density of the light guide points 162 located at the second light guide portion 166. This can increase the light guide amount of the first light guide portion 164 in the thickness direction of the light guide plate 16 and thus increase The amount of light emitted from the area of the liquid crystal display module 100 corresponding to the first light-through hole 184 can further compensate for the darkening of the first light-through hole 184, which is beneficial to reducing visual discomfort for the user.

Specifically, the light guide point 162 may be a groove, a protrusion, or a through hole. The cross section of the light guide point 162 may be a triangle, an arc, a rectangle, an irregular polygon, or the like. The shape of the light guide spot 162 is not limited herein.

In addition, the arrangement of the light guide points 162 may be regular or irregular; the light guide plate 16 may include light guide points 162 of one shape, or light guide points 162 of multiple shapes. The arrangement of the light guide points 162 is not limited here either.

In the example of FIG. 20, a plurality of light guide spots 162 are formed on the upper surface of the light guide plate 16. In the example of FIG. 21, a plurality of light guide spots 162 are formed on the upper and lower surfaces of the light guide plate 16.

Please refer to FIGS. 20 to 21. In some embodiments, in the direction A of the second light guide portion 166 toward the first light guide portion 164, the density of the light guide points 162 located at the second light guide portion 166 gradually increases. Big. Alternatively, in a direction in which the first light guide portion 164 faces the second light guide portion 166, the density of the light guide spots 162 of the first light guide portion 164 gradually decreases.

In this way, in the direction A in which the second light guiding portion 166 faces the first light guiding portion 164, the second light guiding portion 166 gradually becomes brighter, or in a direction in which the first light guiding portion 164 faces the second light guiding portion 166, The first light guide portion 164 gradually becomes dark, thereby ensuring smooth and excessive density of the light guide points 162 at the boundary line between the second light guide portion 166 and the first light guide portion 164, and avoiding the backlight transmitted by the light guide plate 16 in the first place. There is a sudden change in the position of the boundary between the first light guide portion 164 and the second light guide portion 166, thereby making the user more visually comfortable, thereby improving the user experience. For example, when the liquid crystal display module 100 is working and displaying, the area corresponding to the first light hole 184 of the liquid crystal display module 100 is used as the center, and the brightness of the liquid crystal display module 100 is smoothly changed from the center to the surrounding display, thereby reducing The display of the liquid crystal display module 100 is different.

Please refer to FIG. 22. In some embodiments, the backlight module 10 further includes a backlight 19. The backlight 19 is disposed on one side of the light guide plate 16. The backlight 19 is configured to project the light source into the light guide plate 16. In this way, a light source is provided for the backlight module 10 so that the backlight module 10 can work normally.

The backlight 19 is, for example, an LED light source, and the backlight 19 may be in a band shape. The number of the backlight sources 19 may be a specific number such as one or two, and the number of the backlight sources 19 is not limited herein.

In this way, the backlight module 10 is packaged into a whole, which is advantageous for assembling the backlight module 10 with other accessories, and can prevent the backlight module 10 from leaking light from the side.

Specifically, the elastic frame 11 may be a plastic frame. More specifically, the elastic frame 11 may be a opaque plastic frame. In the actual production process, the light-enhancing layer 12, the diffusion film 14, the light guide plate 16, and the reflection sheet 18 can be sequentially stacked in a mold, and then the light-enhancing layer 12, the diffusion film 14, the light guide plate 16, and the reflection can be stacked in order. Dispensing between the sheet 18 and the mold, and finally curing the glue to form a glue frame.

In this way, the reliability of the backlight module 10 can be improved while ensuring the normal operation of the functional device 300. It can be understood that the supporting frame 13 can increase the strength of the backlight module 10, and thus protect the backlight module 10 when receiving an external impact.

Specifically, the support frame 13 may be made of iron. In the actual production process, the light-enhancing layer 12, the diffusion film 14, the light guide plate 16, and the reflection sheet 18 may be fixed in the receiving space 136 by using glue or tape.

The fourth light-passing hole 1322 can enable the functional device to emit light to the outside of the liquid crystal display module 100 and receive light incident from the outside of the liquid crystal display module 100.

Please note that the “fourth through-hole 1322 is used to at least partially contain the functional device 300” includes two cases:

The functional devices 300 are all located in the fourth light-passing hole 1322, as shown in FIGS. 27 and 28. In the example of FIG. 27, the size of the functional device 300 is approximately the same as that of the fourth light-passing hole 1322. In the example, the size of the functional device 300 is smaller than the size of the fourth light-passing hole 1322;

The functional device 300 is partially located in the fourth light-passing hole 1322, as shown in FIG. 29.

1 and 30, a liquid crystal display module 100 according to an embodiment of the present application includes a backlight module 10 according to any one of the above embodiments and a liquid crystal display screen 20 disposed on a light-increasing layer 12 side facing away from the diffusion film 14.

The liquid crystal display module 100 according to the embodiment of the present application improves the local light transmittance of the backlight module 10 by opening the first through hole 184, which can reduce the influence of the backlight module 10 on the functional device 300, so that the functional device 300 can be compared with It is better to emit light to the outside of the backlight module 10 through the first light-through hole 184 or receive external light, so as to ensure that the functional device 300 works normally.

Please refer to FIG. 31. In some embodiments, the liquid crystal display module 100 includes a cover plate 30 covering the liquid crystal display screen 20.

Specifically, the cover plate 30 may be made of a material such as glass, ceramic, or sapphire. Since the cover plate 30 covers the liquid crystal display screen 20, in order to protect the liquid crystal display screen 20, the cover plate 30 may be made of a material having a relatively high hardness, such as the above sapphire material. Alternatively, a hardened layer is formed on the surface of the cover plate 30 to improve the scratch resistance of the cover plate 30.

In one example, the light transmittance of the portion of the liquid crystal display module 100 corresponding to the first light-through hole 184 is greater than 30%, so that the light emitted by the functional device 300 can be transmitted through the liquid crystal display module 100 to the liquid crystal display module. 100, and / or receive light outside the liquid crystal display module 100.

It should be pointed out that the light transmittance can refer to the transmittance to visible light and the transmittance to infrared light. In one example, in the thickness direction of the liquid crystal display module 100, the liquid crystal display module 100 has a transmittance of infrared light having a wavelength of 800-1000 nm is greater than 30%.

Please refer to FIG. 1, FIG. 32, and FIG. 33. An electronic device 1000 according to an embodiment of the present application includes a housing 200 and the liquid crystal display module 100 of any one of the above embodiments. The liquid crystal display module 100 is disposed on the housing 200.

The electronic device 1000 according to the embodiment of the present application improves the local light transmittance of the backlight module 10 by opening the first light through hole 184, which can reduce the influence of the backlight module 10 on the functional device 300, so that the functional device 300 can better Light is emitted to or received from the outside of the backlight module 10 through the first light through hole 184, thereby ensuring the normal operation of the functional device 300.

Specifically, the housing 200 is an external component of the electronic device 1000 and plays a role of protecting and accommodating the internal components of the electronic device 1000 such as the liquid crystal display module 100. More specifically, the housing 200 may be a back cover of the electronic device 1000, which houses components such as a battery of the electronic device 1000.

Please note that the electronic device 1000 includes, but is not limited to, a mobile phone, a tablet computer, or a wearable device.

The electronic device 1000 according to the embodiment of the present application includes a backlight module 10 and a functional device 300. The backlight module 10 includes a light-increasing layer 12, a diffusion film 14, a light guide plate 16, and a reflective sheet 18 that are stacked in this order. The reflective sheet 18 is provided with a first light-through hole 184. The functional device 300 is disposed on a side of the reflective sheet 18 facing away from the light guide plate 16 and is aligned with the first light-through hole 184. The functional device 300 is configured to emit light to the outside of the backlight module 10 through the first light-through hole 184, and / or The first light through hole 184 receives light incident from the outside of the backlight module 10.

In one example, the functional device 300 includes a distance sensor; in another example, the functional device 300 includes a distance sensor and a camera module; in yet another example, the functional device 300 includes a distance sensor, a camera module, a light sensor, and Fingerprint sensor.

When the function device 300 is a distance sensor, the function device 300 emits light to the outside of the liquid crystal display module 100 through the first light hole 184 and receives light reflected from the object through the first light hole 184, so that the electronic device 1000 and the object can be detected. distance.

When the functional device 300 is a light sensor, the functional device 300 receives light outside the liquid crystal display module 100 through the first light-through hole 184 to detect ambient brightness.

When the functional device 300 is a camera module, the functional device 300 receives light outside the liquid crystal display module 100 through the first light-through hole 184 to obtain an external image.

When the functional device 300 is a fingerprint sensor, the functional device 300 emits light to the outside of the liquid crystal display module 100 through the first light hole 184 and receives light reflected from the finger through the first light hole 184, so that fingerprint information can be detected.

It can be understood that when the number of the functional devices 300 is multiple, the number of the corresponding first through-holes 184 is also multiple, and the multiple first light-through holes 184 correspond to the multiple functional devices 300 one-to-one.

In the description of the present specification, descriptions with reference to the terms “one embodiment”, “some embodiments”, “exemplary embodiments”, “examples”, “specific examples”, or “some examples” and the like mean that in combination with Specific features, structures, materials, or characteristics described in the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same implementation or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more implementations or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims

A backlight module of a liquid crystal display module is characterized in that the backlight module includes a light-increasing layer, a diffusion film, a light guide plate, and a reflective sheet that are sequentially stacked and stacked, and the reflective sheet is provided with a first light-through hole. The first light-passing hole is configured to be aligned with a functional device provided on a side of the reflecting sheet facing away from the light guide plate, so that light emitted by the functional device is incident on the backlight through the first light-passing hole. Outside the module, and / or to enable the functional device to receive light incident from the backlight module and passing through the first through-hole.
The backlight module according to claim 1, wherein a light-transmitting material is filled in the first light-passing hole, and a light transmittance of the light-transmitting material is greater than 90%.
The backlight module according to claim 1, wherein the light enhancement layer comprises a first light enhancement film and a second light enhancement film laminated on the side of the first light enhancement film facing the diffusion film, and the first At least one of a light enhancement film and the second light enhancement film is provided with a second light through hole.
The backlight module according to claim 3, wherein a light-transmitting material is filled in the second light-through hole, and a light transmittance of the light-transmitting material is greater than 90%.
The backlight module according to claim 1, wherein a plurality of protrusions are formed on a surface of the light enhancement layer corresponding to the first light-through hole, and the plurality of protrusions are arranged in an array.
The backlight module according to claim 1, wherein a plurality of protrusions are formed on a surface of the light enhancement layer, the light enhancement layer includes a first light enhancement area and a second light enhancement area, and the first light enhancement area and the The first light-through holes are aligned, and the density of the protrusions located in the first light-increasing region is greater than the density of the protrusions located in the second light-increasing region.
The backlight module according to claim 6, wherein in a direction in which the second light-increasing area faces the first light-increasing area, a density of the protrusions located in the second light-increasing area gradually increases. .
The backlight module according to claim 2, wherein the diffusion film is provided with a third light through hole, and the third light through hole is aligned with the first light through hole.
The backlight module according to claim 8, wherein a light-transmitting material is filled in the third light-passing hole, and a light transmittance of the light-transmitting material is greater than 90%.
The backlight module according to claim 1, wherein the light guide plate is formed with light guide points arranged in an array, the light guide plate includes a first light guide portion and a second light guide portion, and the first A light guide portion is aligned with the first light-passing hole, and a density of the light guide points located in the first light guide portion is greater than a density of the light guide points located in the second light guide portion.
The backlight module according to claim 10, wherein in a direction in which the second light guide portion faces the first light guide portion, the The density gradually increases.
The backlight module according to claim 1, wherein the backlight module further comprises a frame surrounding the light-increasing layer, the diffusion film, the light guide plate, and the reflection sheet, and the light-increasing layer The diffusion film, the light guide plate, and the reflection sheet are all fixedly connected to the frame.
The backlight module according to claim 1, wherein the backlight module further comprises a support frame, the support frame includes a substrate and a sidewall extending from an edge of the substrate, and the sidewall and the substrate A accommodating space is enclosed, and the light-increasing layer, the diffusion film, the light guide plate, and the reflection sheet are all accommodated in the accommodating space, and the substrate is provided with a fourth aligned with the first light-through hole. Clear light hole.
The backlight module according to claim 13, wherein the fourth light-through hole is used to at least partially house the functional device.
A liquid crystal display module, characterized in that the liquid crystal display module includes a backlight module and a liquid crystal display screen, and the backlight module includes a light-increasing layer, a diffusion film, a light guide plate, and a reflection sheet that are sequentially stacked. The reflecting sheet is provided with a first light-passing hole, and the first light-passing hole is configured to be aligned with a functional device provided on a side of the reflecting sheet facing away from the light guide plate, so that light emitted by the functional device passes through the The first through-hole is radiated to the outside of the backlight module, and / or so that the functional device receives light incident from the backlight module and passing through the first through-hole, the liquid crystal display screen It is disposed on a side of the light-increasing layer facing away from the diffusion film.
The liquid crystal display module according to claim 15, wherein a light-transmitting material is filled in the first light-passing hole, and a light transmittance of the light-transmitting material is greater than 90%.
The liquid crystal display module according to claim 15, wherein the light enhancement layer comprises a first light enhancement film and a second light enhancement film laminated on the side of the first light enhancement film facing the diffusion film, wherein At least one of the first light enhancement film and the second light enhancement film is provided with a second light through hole.
The liquid crystal display module according to claim 17, wherein a light-transmitting material is filled in the second light-through hole, and a light transmittance of the light-transmitting material is greater than 90%.
The liquid crystal display module according to claim 15, wherein a plurality of protrusions are formed on a surface of the light enhancement layer corresponding to the first light-through hole, and the plurality of protrusions are arranged in an array.
The backlight module according to claim 15, wherein a plurality of protrusions are formed on a surface of the light enhancement layer, the light enhancement layer includes a first light enhancement area and a second light enhancement area, and the first light enhancement area and the The first light-through holes are aligned, and the density of the protrusions located in the first light-increasing region is greater than the density of the protrusions located in the second light-increasing region.
The liquid crystal display module according to claim 20, wherein in a direction in which the second light-increasing region faces the first light-increasing region, a density of the protrusions located in the second light-increasing region gradually increases. Big.
The liquid crystal display module according to claim 16, wherein the diffusion film is provided with a third light through hole, and the third light through hole is aligned with the first light through hole.
The liquid crystal display module according to claim 22, wherein a light-transmitting material is filled in the third light-passing hole, and a light transmittance of the light-transmitting material is greater than 90%.
The liquid crystal display module according to claim 15, wherein the light guide plate is formed with light guide points arranged in an array, and the light guide plate includes a first light guide portion and a second light guide portion, and A first light guide portion is aligned with the first light through hole, and a density of the light guide points located in the first light guide portion is greater than a density of the light guide points located in the second light guide portion.
The liquid crystal display module according to claim 24, wherein, in a direction in which the second light guide portion faces the first light guide portion, the light guide point is located at the second light guide portion. The density gradually increases.
The backlight module according to claim 15, wherein the backlight module further comprises a frame surrounding the light-enhancing layer, the diffusion film, the light guide plate, and the reflection sheet, and the light-enhancing layer The diffusion film, the light guide plate, and the reflection sheet are all fixedly connected to the frame.
The liquid crystal display module according to claim 15, wherein the backlight module further comprises a support frame, the support frame includes a substrate and a sidewall extending from an edge of the substrate, and the sidewall and the The substrate is surrounded by a receiving space. The light-increasing layer, the diffusion film, the light guide plate, and the reflection sheet are all received in the receiving space. The substrate is provided with a first portion aligned with the first light-through hole. Four-way light hole.
The liquid crystal display module according to claim 27, wherein the fourth light-through hole is used to at least partially house the functional device.
An electronic device, comprising:

A backlight module, which includes a light-increasing layer, a diffusion film, a light guide plate, and a reflective sheet stacked in order from top to bottom, and the reflective sheet is provided with a first light through hole; and

A functional device disposed on a side of the reflective sheet facing away from the light guide plate and aligned with the first light-passing hole, and the function device is configured to pass to the backlight through the first light-passing hole Light is emitted outside the module, and / or light incident from outside the backlight module is received through the first light hole.
The electronic device according to claim 29, wherein the functional device comprises at least one of a distance sensor, a camera module, a light sensor, and a fingerprint sensor.