CN109257470B

CN109257470B - Electronic device

Info

Publication number: CN109257470B
Application number: CN201811373478.3A
Authority: CN
Inventors: 郭富豪; 杨乐
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-11-19
Filing date: 2018-11-19
Publication date: 2020-09-11
Anticipated expiration: 2038-11-19
Also published as: CN109257470A

Abstract

The application discloses electron device, it includes backlight unit, liquid crystal display and distance sensor. The backlight module comprises a diaphragm assembly. The liquid crystal display covers the backlight film assembly. The distance sensor is used for transmitting infrared light to the outside of the electronic device through the diaphragm assembly and the liquid crystal display screen and receiving the infrared light reflected by an object outside the electronic device through the liquid crystal display screen and the diaphragm assembly, and the wavelength of the infrared light is larger than or equal to 1300 nm. In the electronic device of this application embodiment, because the wavelength of the infrared light that distance sensor sent is greater than or equal to 1300nm for the ability that the infrared light pierces through the diaphragm subassembly is stronger, and the infrared light can pass the diaphragm subassembly and distance sensor can receive the infrared light that the object reflects, with whether detect the object and shelter from the liquid crystal display module assembly.

Description

Electronic device

Technical Field

The present application relates to the field of display technologies, and in particular, to an electronic device.

Background

Electronic devices such as mobile phones with large screen ratios are increasingly popular with users. In order to improve the screen occupation ratio of the electronic device and prevent the interference between the functional devices such as the distance sensor and the electronic device, the functional devices can be installed below the display screen assembly. However, for the liquid crystal display module, the light emitted from the general distance sensor has a low ability to penetrate through the liquid crystal display module, so that the distance sensor cannot receive the light reflected by the object outside the electronic device, and thus cannot detect whether the object blocks the liquid crystal display module.

Disclosure of Invention

In view of the foregoing, the present application provides an electronic device.

The electronic device of the embodiment of the application comprises a backlight module, a liquid crystal display screen and a distance sensor. The backlight module comprises a diaphragm assembly. The liquid crystal display screen covers the backlight film assembly. The distance sensor is used for transmitting infrared light to the outside of the electronic device through the diaphragm assembly and the liquid crystal display screen, and receiving the infrared light reflected by an object outside the electronic device through the liquid crystal display screen and the diaphragm assembly, wherein the wavelength of the infrared light is larger than or equal to 1300 nm.

In the electronic device of this application embodiment, because the wavelength of the infrared light that distance sensor sent is greater than or equal to 1300nm for the ability that the infrared light pierces through the diaphragm subassembly is stronger, and the infrared light can pass the diaphragm subassembly and distance sensor can receive the infrared light that the object reflects, with whether detect the object and shelter from the liquid crystal display module assembly.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a liquid crystal display module according to an embodiment of the present disclosure;

FIG. 2 is a schematic plan view of an electronic device according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of an electronic device according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of a backlight module according to an embodiment of the present disclosure;

FIG. 5 is another schematic cross-sectional view of a backlight module according to an embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view of a backlight module according to an embodiment of the present application;

FIG. 7 is an exploded view of a backlight module according to an embodiment of the present disclosure;

FIG. 8 is a schematic cross-sectional view of a backlight module according to an embodiment of the present disclosure;

FIGS. 9-13 are schematic perspective views of a light enhancement layer according to embodiments of the present application;

FIG. 14 is an exploded schematic view of a light enhancement layer according to an embodiment of the present application;

FIG. 15 is an exploded schematic view of another embodiment of a light enhancement layer of the present application;

FIG. 16 is an exploded schematic view of a light enhancement layer according to yet another embodiment of the present application;

FIG. 17 is a schematic perspective view of a light enhancement layer according to an embodiment of the present application;

FIG. 18 is an exploded view of a film assembly of a backlight module according to an embodiment of the present disclosure;

FIG. 19 is an exploded view of a film assembly of a backlight module according to another embodiment of the present application;

FIG. 20 is an exploded view of a film assembly of a backlight module according to another embodiment of the present application;

fig. 21 is a schematic cross-sectional view of a light guide plate according to an embodiment of the present application;

FIG. 22 is a schematic cross-sectional view of a light guide plate according to another embodiment of the present application;

FIG. 23 is an exploded view of a backlight module according to another embodiment of the present application;

FIG. 24 is an exploded view of a backlight module according to still another embodiment of the present application;

description of the main element symbols:

the backlight module 10, the film assembly 110, the light intensifying layer 12, the light intensifying region 122, the through hole 1222, the first light transmitting region 124, the first light intensifying film 126, the second light intensifying film 128, the frame 13, the bottom plate 132, the flat plate portion 133, the connecting portion 135, the first connecting plate 1320, the second connecting plate 1321, the first light transmitting hole 1322, the sidewall 134, the accommodating space 136, the diffusion film 14, the light diffusing region 142, the second light transmitting region 144, the third light transmitting hole 146, the light guide plate 16, the light guide point 162, the first light guide portion 164, the second light guide portion 166, the reflective sheet 18, the second light transmitting hole 1322, the backlight 19, the liquid crystal display module 100, the liquid crystal display 20, the cover plate 30, the electronic device 1000, the housing 200, the functional device 300, the emitter 310, and the receiver 320.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, a liquid crystal display module 100 according to an embodiment of the present disclosure includes a backlight module 10, a liquid crystal display 20, and a cover plate 30. The liquid crystal display 20 is located between the backlight module 10 and the cover plate 30. Or, the cover plate 30 covers the liquid crystal display panel 20.

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

Referring to fig. 2 and fig. 3, an electronic device 1000 according to an embodiment of the present disclosure includes a liquid crystal display module 100, a housing 200, and a functional device 300. The liquid crystal display module 100 is disposed on the housing 200. Therefore, it can be understood that the electronic device 1000 includes the backlight module 10, the liquid crystal display 20 and the cover 30.

By way of example, the electronic device 1000 may be any of various types of computer system equipment (only one modality shown in FIG. 2 by way of example) that is mobile or portable and that performs wireless communications. Specifically, the electronic apparatus 1000 may be a mobile phone or a smart phone (e.g., an iPhone-based phone), a Portable game device (e.g., Nintendo DS, PlayStation Portable, game Advance, iPhone), a laptop computer, a PDA, a Portable internet device, a music player, and a data storage device, other handheld devices, and a head-mounted device (HMD) such as a watch, an in-ear phone, a pendant, a headset, etc., and the electronic apparatus 1000 may also be other wearable devices (e.g., a head-mounted device (HMD) such as electronic glasses, electronic clothes, an electronic bracelet, an electronic necklace, an electronic tattoo, an electronic device, or a smart watch).

The electronic apparatus 1000 may also be any of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controllers, pagers, laptop computers, desktop computers, printers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving Picture experts group (MPEG-1 or MPEG-2) Audio layer 3(MP3) players, portable medical devices, and digital cameras, and combinations thereof.

In some cases, the electronic device 1000 may perform multiple functions (e.g., playing music, displaying video, storing pictures, and receiving and sending telephone calls). If desired, the electronic apparatus 1000 may be a portable device such as a cellular telephone, media player, other handheld device, wrist watch device, pendant device, earpiece device, or other compact portable device.

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

Referring to fig. 2-3, in the present embodiment, the backlight module 10 includes a film assembly 110 and a frame 13. The frame 13 includes a bottom plate 132 and a side wall 134. The side wall 134 extends from an edge of the bottom plate 132. The sidewall 134 surrounds the diaphragm assembly 110. The diaphragm assembly 110 is carried on a base plate 132. The bottom plate 132 has a plurality of first light passing holes 1322 penetrating the bottom plate 132 and disposed in an isolated manner. In this embodiment, the number of the first light passing holes 1322 is two.

The functional device 300 includes an emitter 310 and a receiver 320 separately provided from the emitter 310, and the emitter 310 and the receiver 320 are respectively provided corresponding to one of the first light passing holes 1322. The emitter 310 is configured to emit light to the outside of the electronic device 1000 through the membrane assembly 110 and the corresponding first light passing hole 1322. The receiver 320 is configured to receive light reflected by an object outside the electronic device 1000 through the membrane assembly 110 and the corresponding first light passing hole 1322.

In this way, the first light passing hole 1322 allows the emitter 310 to emit light to the outside of the electronic device 1000 normally, and also allows the receiver 320 to receive light reflected by an object outside of the electronic device 1000 normally, and the emitter 310 and the receiver 320 cooperate to allow the functional device 300 to work normally.

In one example, the transmitter 310 may be an infrared light emitting source and the receiver 320 may be an infrared fingerprint sensor. At this time, the functional device can detect fingerprint information according to the light reflected by the object.

In some embodiments, the receiver 320 may be a receiving site of a distance sensor. In this case, when the functional device 300 is a distance sensor, the transmitter 310 may emit light to the outside of the electronic device 1000, and the receiver 320 may receive the light reflected by the object, so as to detect the distance between the electronic device 1000 and the object.

Alternatively, the distance sensor is used for transmitting infrared light to the outside of the electronic device 1000 through the film assembly 110 and the liquid crystal display panel 110, and for receiving infrared light reflected by an object outside the electronic device 1000 through the liquid crystal display panel 110 and the film assembly 110, and the wavelength of the infrared light is greater than or equal to 1300 nm.

Typical distance sensors emit infrared light at a wavelength less than 1300nm, for example, at 850nm or 940nm, where infrared light has a poor ability to penetrate the diaphragm assembly.

In the embodiment of the present application, the wavelength of the infrared light emitted by the distance sensor is greater than or equal to 1300nm, so that the infrared light has a relatively strong ability to penetrate through the membrane assembly 110, and the infrared light can penetrate through the membrane assembly 110 and the distance sensor can receive the infrared light reflected by the object, so as to detect whether the object blocks the liquid crystal display module.

Preferably, the wavelength of the infrared light emitted by the distance sensor is [1300, 1500] nm or [2500, 2700] nm. For example, the infrared light has a wavelength of 1300nm, 1400nm, 1500nm, 2500nm, 2600nm, 2700 nm.

When the wavelength of the infrared light is less than 1300nm, the infrared light has a poor ability to penetrate the film assembly 110, and the sunlight contains a large amount of infrared light in this wavelength band, which causes a large interference. When the wavelength of the infrared light is (1500, 2500) nm, the infrared light is easily absorbed by the human body, so that the infrared light reflected after being absorbed by the human body is less and is not easily received by the receiver 320 of the distance sensor. When the wavelength of infrared light is longer than 2700nm, the distance sensor is difficult to manufacture and the cost is high. Therefore, the infrared light has a wavelength of [1300, 1500] nm or [2500, 2700] nm, the infrared light emitted from the distance sensor easily penetrates the diaphragm assembly 110, the detection capability is strong, and the manufacturing cost is low.

In some embodiments, functional device 300 may omit emitter 310. In this case, the functional device 300 is, for example, at least one of a camera module and a light sensor.

When the functional device 300 is a light sensor, the functional device 300 receives light from the electronic device 1000 through the membrane assembly 110 and the first light hole 1322 to detect the ambient brightness.

When the functional device 300 is a camera module, the functional device 300 receives light from the electronic device 1000 through the membrane assembly 110 and the first light hole 1322 to obtain an external image.

It is understood that, when there are a plurality of functional devices 300, there are a plurality of corresponding first light passing holes 1322, and the first light passing holes 1322 correspond to the functional devices 300 one to one.

In one example, the transmitter 310 and the receiver 230 are both disposed on a side of the base plate 132 facing away from the membrane assembly 110 and aligned with the first light passing hole 1322. In this way, the emitter 310 can emit light out of the electronic device 1000 through the first light passing hole 1322. The receiver 320 receives light reflected from an object outside the electronic device 1000 through the first light passing hole 1322.

In the present embodiment, the cover plate 30 covers the backlight module 10. The emitter 310 is used for emitting light to the outside of the electronic device 1000 through the first light hole 1322, the membrane assembly 110 and the cover plate 30 in sequence. The receiver 320 is used for receiving the light reflected by the object outside the electronic device 1000 through the cover plate 30, the membrane assembly 110 and the first light passing hole 1322 in sequence.

Referring to fig. 4, in some embodiments, the bottom plate 132 includes a flat plate portion 133 and a connecting portion 135 connecting the flat plate portion 133. The diaphragm assembly 110 is carried on the flat plate portion 133. The connection portion 135 is spaced apart from the diaphragm assembly 110. The first light passing hole 1322 is formed in the connection portion 135. There is a gap between the periphery of the first light passing hole 1322 and the diaphragm assembly 110.

In this way, the connecting portion 135 is spaced from the diaphragm assembly 110, and a gap is formed between the periphery of the first light hole 1322 and the diaphragm assembly 110, so that the interference between the periphery of the first light hole 1322 and the diaphragm assembly 110 can be avoided, and the liquid crystal display module can normally display.

In particular, it can be understood that the frame 13 can improve the overall strength of the backlight module 10, thereby protecting the backlight module 10 when being impacted by the external environment. Both the bottom plate 132 and the side walls 134 may be made of a metal material. This increases the strength of the frame 13.

The flat plate portion 133 is sheet-shaped. The diaphragm assembly 110 may be secured to the plate portion 133 by adhesive. The specific structure of the connection portion 135 may be specifically set according to actual circumstances, as long as the connection portion 135 is spaced apart from the diaphragm assembly 110, and a gap is provided between the periphery of the first light passing hole 1322 and the diaphragm assembly 110.

The first light passing hole 1322 may be manufactured by punching, and it can be understood that, since a gap is formed between the peripheral edge of the first light passing hole 1322 and the flat plate portion 133, a space is left when the peripheral edge of the first light passing hole 1322 is deformed toward the flat plate portion 133, so as to prevent the peripheral edge of the first light passing hole 1322 from interfering with the diaphragm assembly 110 after the diaphragm assembly 110 is mounted to the flat plate portion 133.

The shape of the first light passing hole 1322 may be specifically set, for example, the first light passing hole 1322 may have a circular shape, a square shape, a triangular shape, an irregular shape, and the like. The number of the first light passing holes 1322 may be 2, 3, etc. The plurality of first light passing holes 1322 are isolated, that is, the medium for isolating between two adjacent first light passing holes 1322 is not air.

In this embodiment, the size of the light passing hole 1322 corresponding to the receiver 320 is larger than the size of the light passing hole 1322 corresponding to the transmitter 310. In this way, the receiver 320 can receive more light reflected by the object, which is beneficial to improving the efficiency of the normal operation of the receiver 320.

It should be noted that the joint between the flat plate portion 133 and the connecting portion 135 has a high strength, and is not easily deformed when the backlight module 10 is impacted, so that the joint does not interfere with the film assembly 110.

In some embodiments, the connecting portion 135 includes a first connecting plate 1320 and a second connecting plate 1321, the first connecting plate 1320 connects the flat plate portion 133 and the second connecting plate 1321, the first connecting plate 1320 is disposed obliquely with respect to the flat plate portion 133, the second connecting plate 1321 is parallel to the flat plate portion 133, and the first light passing hole 1322 is formed in the second connecting plate 1321.

Thus, the connection portion 135 has a simple structure and is easily formed. Specifically, as shown in fig. 4, the first connection plate 1320 and the second connection plate 1321 enclose an escape groove 137, and the first light passing hole 1322 communicates with the escape groove 137.

In some embodiments, the gap D between the first light passing hole 1322 and the membrane assembly 110 is [0.03, 0.1] mm in size. Specifically, if the gap between the peripheral edge of the first light passing hole 1322 and the diaphragm assembly 110 is less than 0.03mm, the peripheral edge of the first light passing hole 1322 is easily interfered with the diaphragm assembly 110 after being impacted. If the circumference of the first light passing hole 1322 is greater than 0.1mm, the thickness of the backlight assembly 10 is easily increased. Therefore, when the gap D is within the above range, the interference between the periphery of the first light passing hole 1322 and the film assembly 110 can be avoided, and the thickness of the backlight module 10 can be reduced.

Referring to fig. 5, in some embodiments, the connecting portion 135 extends from the flat plate portion 133 in a direction away from the diaphragm assembly 110, and the first light passing hole 1322 is formed at a side of the connecting portion 135 away from the flat plate portion 133. Thus, the thickness of the backlight module 10 can be reduced while the periphery of the first light passing hole 1322 does not interfere with the film assembly 110.

Specifically, in this embodiment, the connecting portion 135 has a circular truncated cone shape. The connecting portion 135 is large in size. That is, the connecting portion 135 has a smaller size on a side close to the diaphragm assembly 110 than on a side away from the diaphragm assembly 110.

Referring to fig. 6, in some embodiments, the connecting portion 135 extends from the flat plate portion 133 in a direction away from the diaphragm assembly 110, and the first light passing hole 1322 is formed at a side of the connecting portion 135 away from the flat plate portion 133. In this embodiment, the connecting portion 135 has a circular truncated cone shape. The connecting portion 135 is small in size and large in size. Alternatively, the connecting portion 135 has a larger size on a side close to the diaphragm assembly 110 than on a side away from the diaphragm assembly 110.

Referring to fig. 7 and 8, specifically, the film assembly 110 includes a light-enhancing layer 12, a diffusion film 14, a light guide plate 16, and a reflective sheet 18, which are sequentially stacked, and the reflective sheet 18 is disposed near the flat plate portion 133.

In this embodiment, the light enhancement layer 12 includes a light enhancement region 122 and a first light transmission region 124, the light transmittance of the first light transmission region 124 is greater than that of the light enhancement region 122, and the first light transmission region 124 is disposed corresponding to the first light through hole 1322. The first light-transmitting area 124 is disposed corresponding to the first light-passing hole 1322, the first light-transmitting area 124 may be aligned with the first light-passing hole 1322, or the first light-transmitting area 124 may be disposed to be staggered with the first light-passing hole 1322. As long as it is ensured that the functional device 300 can emit and receive light through the first light-transmitting region 124 and the first light-passing hole 1322.

It is understood that the first light-transmitting region 124 is aligned with the functional device 300, and may be an orthographic projection of the first light-transmitting region 124 on the light guide plate 16 to cover an orthographic projection of the functional device 300 on the light guide plate 16.

The backlight module 10 according to the embodiment of the application utilizes the first light-transmitting area 124 to improve the local light transmittance of the backlight module 10, so that the functional device 300 can emit light to the outside of the backlight module 10 and/or receive light from the outside of the backlight module 10 through the first light-transmitting area 124, thereby ensuring that the functional device 300 works normally.

In one example, the transmittance of the portion of the liquid crystal display module 100 corresponding to the first light-transmitting area 124 is greater than 30%, so that the functional device 300 can receive light outside the liquid crystal display module 100 through the liquid crystal display module 100.

Note that the light transmittance may refer to transmittance of visible light or transmittance of infrared light. In one example, the transmittance of the liquid crystal display module 100 in the thickness direction of the liquid crystal display module 100 is greater than 50% for infrared light having a wavelength greater than 1300 nm.

Specifically, referring to fig. 9 to 11, the first light-transmitting region 124 may be located at any position of the light-adding layer 12, and the position of the first light-transmitting region 124 is not limited herein.

In one example, the first light-transmitting region 124 is in the upper right corner of the prism layer 12, as shown in fig. 9; in another example, the first light-transmitting region 124 is at the lower left corner of the prism layer 12, as shown in fig. 10; in yet another example, the center of the first light-transmitting region 124 coincides with the center of the light-adding layer 12, as shown in fig. 11.

The shape of the first light-transmitting region 124 may be any shape such as a circle, an ellipse, a square, a rectangle, a trapezoid, an irregular polygon, etc., and the shape of the first light-transmitting region 124 is not limited herein.

In addition, referring to fig. 11 and 12, the light-adding layer 12 may include one first light-transmitting region 124, or may include a plurality of first light-transmitting regions 124, where the number of the first light-transmitting regions 124 is not limited.

In the example of fig. 11, the light intensifying layer 12 includes 1 light transmitting region 124; in the example of fig. 12, the light intensifying layer 12 includes 3 light transmitting regions 124; in the example of fig. 13, the light intensifying layer 12 includes 5 light transmitting regions 124.

Referring to fig. 14-16, in some embodiments, the light-adding layer 12 includes a first light-adding film 126 and a second light-adding film 128 stacked on a side of the first light-adding film 126 facing the diffuser film 14, at least one of the first light-adding film 126 and the second light-adding film 128 including a first light-transmitting region 124.

Note that here, "at least one of the first and second

bright enhancement films

126 and 128 includes the first light-transmitting region 124" includes three cases:

the first brightness enhancement film 126 includes a first light-transmitting region 124, as shown in fig. 14;

the second brightness enhancement film 128 includes a first light transmitting region 124, as shown in fig. 15;

the first light enhancement film 126 includes a first light transmitting region 124, the second light enhancement film 128 also includes a first light transmitting region 124, and the first light transmitting region 124 on the first light enhancement film 126 is aligned with the first light transmitting region 124 on the second light enhancement film 128, as shown in fig. 16.

Referring to fig. 17, in some embodiments, the light-increasing region 122 is formed with a through hole 1222, the through hole 1222 is filled with a light-transmitting material to form the first light-transmitting region 124, and the light transmittance of the light-transmitting material is greater than 90%; or the light-increasing region 122 and the first light-transmitting region 124 are integrally formed. As such, the first light-transmitting region 124 is easily formed, and the light transmittance of the first light-transmitting region 124 is made greater than that of the light-increasing region 122.

Note that the light transmittance of the light-transmitting material is greater than that of the light-increasing region 122, the light-transmitting material is, for example, Polymethyl methacrylate (PMMA), and the light-increasing region 122 is, for example, Polyethylene Terephthalate (PET).

Referring to fig. 18, in some embodiments, the reflector 18 is provided with a second light hole 1322, and the second light hole 1322 is aligned with the first light-transmitting area 124. Thus, the second light passing holes 1322 allow the light emitted from the functional device 300 to pass through the reflective sheet 18 and then exit to the outside of the backlight module 10, and/or allow the functional device 300 to receive the light incident from the outside of the backlight module 10.

Referring to fig. 19, in some embodiments, the diffusion film 14 includes a light diffusion region 142 and a second light transmission region 144, the light transmittance of the second light transmission region 144 is greater than the light transmittance of the light diffusion region 142, the light diffusion region 142 is aligned with the light enhancement region 122, and the second light transmission region 144 is aligned with the first light transmission region 124.

In this way, the second light-transmitting region 144 can reduce or even eliminate the loss of light passing through the first light-transmitting region 124 in the diffusion film 14, thereby further increasing the transmittance of light passing through the first light-transmitting region 124.

Similarly, the light diffusion region 142 may also be formed with a through hole filled with a light transmissive material to form the second light transmissive region 144, where the light transmittance of the light transmissive material is greater than 90%; or the light diffusion region 142 and the second light transmission region 144 are integrally formed. And will not be described in detail herein.

Referring to fig. 20 and 21, 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 first light guide portion 164 is aligned with the light increasing region 122, the second light guide portion 166 is aligned with the first light transmitting region 124, and the density of the light guide points 162 located in the second light guide portion 166 is greater than the density of the light guide points 162 located in the first light guide portion 164. Thus, the light guide point 162 can be disposed in a manner of compensating for the visual difference caused by the higher transmittance of the first light-transmitting region 124.

It can be understood that, even though the light transmittance of the first light-transmitting area 124 is higher than that of the light-intensifying area 122, the user easily feels that the first light-transmitting area 124 is darker than the light-intensifying area 122 when viewing due to the absence of the light-intensifying structure of the light-transmitting area 124, so that the user experience is poor. The density of the light guide points 162 of the second light guide portion 166 is greater than that of the light guide points 162 of the first light guide portion 164, so that the light guiding amount of the second light guide portion 166 in the thickness direction of the light guide plate 16 can be increased, the light output amount of the liquid crystal display module 100 in the area corresponding to the first light transmission area 124 can be increased, the darkening of the first light transmission area 124 can be compensated, and the discomfort of a user in the vision can be reduced.

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 triangular, arc-shaped, rectangular, irregular polygonal, etc. The shape of the light guide point 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 one shape of the light guide points 162, or may include a plurality of shapes of the light guide points 162. The arrangement of the light guide points 162 is not limited herein.

In the example of fig. 21, a plurality of light guide points 162 are formed on the upper surface of the light guide plate 16. In the example of fig. 22, the upper surface and the lower surface of the light guide plate 16 are each formed with a plurality of light guide points 162.

Referring to fig. 21, in some embodiments, the density of the light guiding points 162 located in the first light guiding portion 164 is gradually increased in a direction a from the first light guiding portion 164 to the second light guiding portion 166. Alternatively, the density of light guiding points 162 of the second light guiding portion 166 decreases gradually in the direction from the center of the surface of the second light guiding portion 166 facing the diffusion film 14 toward the first light guiding portion 164.

In this way, in a direction a where the first light guide portion 164 faces the second light guide portion 166, the first light guide portion 164 gradually becomes brighter, or in a direction a where the second light guide portion 166 faces the first light guide portion 164, the second light guide portion 166 gradually becomes darker, so that smoothness and transition of the density of the light guide points 162 at a boundary position between the first light guide portion 164 and the second light guide portion 166 are ensured, and abrupt change of the backlight conducted by the light guide plate 16 at the boundary position between the first light guide portion 164 and the second light guide portion 166 is avoided, so that a user is more comfortable in vision, and user experience is improved.

For example, when the liquid crystal display module 100 is operated and displays, the brightness of the liquid crystal display module 100 displayed from the center to the periphery is smoothly transited and changed by taking the area of the liquid crystal display module 100 corresponding to the first light-transmitting area 124 as the center, so as to reduce the display difference of the liquid crystal display module 100.

Referring to fig. 23, 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, and the backlight 19 is used for emitting light into the light guide plate 16. Thus, 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 have a band shape. The number of the backlights 19 may be a specific number such as 1 or 2, and the number of the backlights 19 is not limited herein.

Referring to fig. 24, in some embodiments, the diffusion film 14 is formed with a third light-passing hole 146, and the third light-passing hole 146 is aligned with the first light-transmitting region 124. In this manner, the light transmittance can be further improved by the third light passing hole 146.

In summary, the electronic device 1000 according to the embodiment of the present disclosure includes a backlight module 10, a liquid crystal display 20, and a distance sensor. The backlight module 10 includes a film assembly 110. The liquid crystal display panel 20 covers the backlight film assembly 110. The distance sensor is used for transmitting infrared light to the outside of the electronic device 1000 through the diaphragm assembly 110 and the liquid crystal display screen 20, and for receiving the infrared light reflected by an object outside the electronic device 1000 through the liquid crystal display screen 20 and the diaphragm assembly 110, and the wavelength of the infrared light is greater than or equal to 1300 nm.

In the electronic device 1000 according to the embodiment of the present application, because the wavelength of the infrared light emitted by the distance sensor is greater than or equal to 1300nm, the ability of the infrared light penetrating through the membrane assembly 110 is stronger, the infrared light can penetrate through the membrane assembly 110 and the distance sensor can receive the infrared light reflected by the object, so as to detect whether the object blocks the liquid crystal display module.

In some embodiments, the infrared light emitted by the distance sensor has a wavelength of [1300, 1500] nm or [2500, 2700] nm.

In some embodiments, the backlight module 10 further includes a frame 13, the frame 13 includes a bottom plate 132 and a sidewall 134 extending from an edge of the bottom plate 132, the sidewall 134 surrounds the film assembly 110, the film assembly 110 is carried on the bottom plate 132, the bottom plate 132 has a first light passing hole 1322 penetrating through the bottom plate 132, and the lcd panel 20 is stacked on a side of the film assembly 110 facing away from the bottom plate 132;

the distance sensor is configured to emit infrared light to the outside of the electronic device 1000 through the first light hole 1322, the diaphragm assembly 110 and the liquid crystal display panel 20, and is configured to receive infrared light reflected by an object outside the electronic device 1000 through the liquid crystal display panel 20, the diaphragm assembly 110 and the first light hole 1322.

In this way, the frame 13 can prolong the life of the backlight module 10, and the first light passing hole 1322 enables the distance sensor to normally emit infrared light to the outside of the electronic device 1000 and receive infrared light emitted by an object outside the electronic device 1000.

In some embodiments, the number of the first light passing holes 1322 is two, two first light passing holes 1322 are separately disposed, the distance sensor includes a transmitter 310 and a receiver 320, the transmitter 310 is configured to transmit infrared light to the outside of the electronic device 1000 through one of the first light passing holes 1322, the membrane assembly 110 and the lcd panel 20, and the receiver 320 is configured to receive infrared light reflected by an object outside the electronic device 1000 through the lcd panel 20, the membrane assembly 110 and the other first light passing hole 1322.

Thus, the two first light passing holes 1322 can prevent the infrared light emitted from the emitter 310 from directly passing to the receiver 320, and prevent the receiver 320 from receiving interference.

In some embodiments, the size of the first light passing hole 1322 corresponding to the receiver 320 is larger than the size of the first light passing hole 1322 corresponding to the transmitter 310. Since the infrared light emitted from the emitter 310 is attenuated after passing through the diaphragm assembly 110 and being emitted by the object, the size of the first light passing hole 1322 corresponding to the receiver 320 is larger so that the receiver 320 can receive more infrared light, thereby improving the detection capability of the distance sensor.

In some embodiments, the film assembly 110 includes a light intensifying layer 12, a diffusion film 14, a light guide plate 16, and a reflective sheet 18, which are sequentially stacked, and the reflective sheet 18 is disposed adjacent to the distance sensor. Thus, the multi-layer structure of the film assembly 110 can improve the display effect of the liquid crystal display panel 20.

In some embodiments, the light enhancement layer 12 includes a light enhancement region 122 and a first light transmission region 124, the light transmission of the first light transmission region 124 is greater than the light transmission of the light enhancement region 12, and the first light transmission region 124 is disposed in correspondence with the distance sensor. As such, the first light-transmitting region 124 can increase the light transmittance of the film assembly 110.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic device, comprising:

the backlight module comprises a diaphragm assembly and a frame body, wherein the frame body comprises a bottom plate and a side wall extending from the edge of the bottom plate, the side wall surrounds the diaphragm assembly, the diaphragm assembly is borne on the bottom plate, the bottom plate is provided with a light through hole penetrating through the bottom plate, the bottom plate comprises a flat plate part and a connecting part connected with the flat plate part, the diaphragm assembly is borne on the flat plate part, the connecting part and the diaphragm assembly are arranged at intervals, the light through hole is formed in the connecting part, and a gap is formed between the periphery of the light through hole and the diaphragm assembly so as to avoid the interference between the periphery of the light through hole and the diaphragm assembly;

the liquid crystal display screen covers the backlight diaphragm assembly, and is arranged on one side, away from the bottom plate, of the diaphragm assembly in a laminated mode; and

the distance sensor is used for transmitting infrared light to the outside of the electronic device through the light through hole, the diaphragm assembly and the liquid crystal display screen, and receiving the infrared light reflected by an object outside the electronic device through the liquid crystal display screen, the diaphragm assembly and the light through hole, and the wavelength of the infrared light is larger than or equal to 1300 nm.

2. The electronic device of claim 1, wherein the infrared light has a wavelength of [1300, 1500] nm or [2500, 2700] nm.

3. The electronic device of claim 1, wherein the number of the light-passing holes is two, two of the light-passing holes are separately disposed, the distance sensor includes a transmitter and a receiver, the transmitter is configured to transmit infrared light to the outside of the electronic device through one of the light-passing holes, the diaphragm assembly and the liquid crystal display, and the receiver is configured to receive the infrared light reflected by an object outside the electronic device through the liquid crystal display, the diaphragm assembly and the other light-passing hole.

4. The electronic device of claim 1, wherein a size of the light pass hole corresponding to the receiver is larger than a size of the light pass hole corresponding to the transmitter.

5. The electronic device according to claim 1, wherein the connecting portion includes a first connecting plate and a second connecting plate, the first connecting plate connecting the flat plate portion and the second connecting plate, the first connecting plate being disposed obliquely with respect to the flat plate portion, the second connecting plate being parallel to the flat plate portion, the light-passing hole being formed in the second connecting plate; or

The connecting part is gathered and extended from the flat plate part to the direction far away from the diaphragm assembly, and the light through hole is formed in one side, far away from the flat plate part, of the connecting part; or

The connecting part extends from the flat plate part in a diffusion mode in the direction far away from the diaphragm assembly, and the light through hole is formed in one side, far away from the flat plate part, of the connecting part.

6. The electronic device of claim 1, wherein a gap between a periphery of the light passing hole and the diaphragm assembly is [0.03, 0.1] mm in size.

7. The electronic device according to claim 1, wherein the film assembly includes a light-intensifying layer, a diffusion film, a light guide plate, and a reflecting sheet, which are sequentially stacked, the reflecting sheet being disposed adjacent to the distance sensor.

8. The electronic device according to claim 7, wherein the light-adding layer includes a light-adding region and a light-transmitting region, a light transmittance of the light-transmitting region is larger than a light transmittance of the light-adding region, and the light-transmitting region is provided in correspondence with the distance sensor.