CN210402377U - Infrared backlight unit, detection module, backlight module, display device and electronic equipment - Google Patents

Abstract

The utility model discloses an infrared backlight unit, which comprises an emission unit for emitting infrared beams, wherein the infrared beams can be used for detecting the biological characteristic information of an external object, or drawing the image of the external object, or detecting the space coordinate change of the external object; the light guide layer comprises a side surface and an upper surface which are connected, and is used for enabling the infrared light beams to enter the light guide layer from the side surface and to be emitted from the upper surface; and the receiving unit is arranged below the infrared backlight unit and can receive the infrared light beams reflected by an external object through the infrared backlight unit. The utility model also discloses a detection module including infrared backlight unit, collocation the backlight unit that detection module used to reach display device and electronic equipment including above-mentioned detection module and backlight unit. The utility model discloses better visual effect has.

Description

Infrared backlight unit, detection module, backlight module, display device and electronic equipment

Technical Field

The utility model relates to the field of photoelectric technology, especially, relate to a detect module assembly, backlight unit, display device and electronic equipment.

Background

With the technical progress and the improvement of living standard of people, users demand more functions and fashionable appearance for electronic products such as mobile phones, tablet computers, cameras and the like. At present, the development trend of mobile phones is that the mobile phones are light and thin, are close to a full screen, and have functions of self-shooting by a front camera, face recognition and the like. As the functions supported by the electronic device become more and more abundant, the number of elements to be set becomes more and more, and a part of the display area on the front side of the electronic device needs to be occupied, which affects the appearance and user experience.

Recently, in order to achieve a full-screen or nearly full-screen effect, a technology of detecting biological characteristics under a screen has come into use, that is, a biological characteristic detection module is placed below a display screen, and infrared beams are sent or received through the display screen to achieve biological characteristic detection. However, for non-self-emissive types of display screens, such as liquid crystal display screens, sub-screen biometric detection needs to address the problem of screen transmissivity with respect to infrared light beams. Some manufacturers have proposed placing the biometric detection module under the backlight module and tapping the entire display screen and backlight module. Although the scheme can realize the detection of the biological characteristics under the screen, the relatively complex process is needed, the product cost is higher, and the holes are needed on the screen and the backlight module, so that the visual effect of the whole display of the screen is poorer.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an infrared backlight unit, detection module assembly, backlight unit, display device and electronic equipment for under screen for solving prior art problem.

One aspect of the present invention discloses an infrared backlight unit, comprising a transmitting unit for transmitting an infrared beam, wherein the infrared beam can be used for detecting biological characteristic information of an external object, or drawing an image of the external object, or detecting a change in spatial coordinates of the external object; the light guide layer comprises a side surface and an upper surface which are connected, and is used for enabling the infrared light beams to enter the light guide layer from the side surface and to be emitted from the upper surface; a receiving unit arranged below the light guide layer can receive the infrared light beams reflected by an external object through the infrared backlight unit.

Optionally, the infrared backlight unit further includes a diffusion sheet and/or a prism sheet sequentially disposed on the light guide layer, the diffusion sheet is used for diffusing the infrared light beams, and the prism sheet is used for increasing the brightness of the infrared light beams within a corresponding angle of the detection range.

Optionally, the light guide layer has an opening corresponding to one receiving unit, and the receiving unit receives the infrared beam reflected by the external object through the opening.

Optionally, the emitting unit is disposed adjacent to one side of the light guide layer, the light guide layer has a first opening corresponding to the receiving unit, and a light shielding layer is disposed inside the first opening and can prevent the infrared light from passing through the light shielding layer.

Optionally, the infrared backlight unit further includes a reflection layer disposed below the light guide layer, the reflection layer has a second opening corresponding to the receiving unit, the second opening is disposed inside the light shielding layer, the light shielding layer is made of opaque material, and the light shielding layer is disposed close to a backlight module disposed above the infrared backlight unit and can be used for blocking the infrared light beam from directly entering the receiving unit without being reflected by an external object and reducing external stray light from entering the receiving unit.

Optionally, the reflection layer is configured to reflect a portion of the infrared beam entering the light guide layer from the side of the light guide layer and exiting from the lower side of the light guide layer, and then enter the light guide layer.

An aspect of the utility model discloses a detection module assembly, be in including foretell infrared backlight unit and setting the receiving element of infrared backlight unit below, detection module assembly can see through a display module assembly and receive and/or launch infrared light beam.

One aspect of the present invention discloses a backlight module, a detection module disposed below the backlight module can transmit and receive infrared light beams through the backlight module, the backlight module comprises a light guide plate, a reflector plate arranged below the light guide plate, a diffusion plate arranged above the light guide plate, and a backlight source arranged on one side of the light guide plate, the backlight light source is used for providing backlight beams for image display, the light guide plate comprises a light emergent surface opposite to the diffusion sheet and a light incident surface connected with the light emergent surface, the light guide plate is used for receiving backlight beams from a backlight light source from the light incident surface and emitting the backlight beams from the light emitting surface, the reflector plate is used for reflecting part of backlight beams emitted from the bottom of the light guide plate into the light guide plate and transmitting the infrared beams.

An aspect of the utility model discloses a display device, including display module assembly and the detection module assembly of setting in the display module assembly below, display module assembly can launch the light beam in a poor light that is used for showing, it can see through to detect the module assembly the display module assembly launches and receives infrared light beam, it is foretell detection module assembly to detect the module assembly.

Optionally, the display module includes a display panel and a backlight module disposed below the liquid crystal display panel, the backlight module is disposed below the backlight module, the infrared light beam emitted by the detection module sequentially penetrates through the backlight module and the display panel to exit to the outside, and is reflected by an external object and then sequentially penetrates through the display panel and the backlight module to reach the detection module. The detection module comprises an infrared backlight unit and a receiving unit arranged below the infrared backlight unit, and the infrared backlight unit is the infrared backlight unit.

One aspect of the present invention discloses an electronic device, which includes the infrared backlight unit, the detection module, the backlight module, or the display device.

Compared with the prior art, the utility model discloses infrared backlight unit, detection module assembly, backlight unit, display device and electronic equipment utilize the detection module assembly to see through the display module assembly transmission and receive infrared light beam, and infrared backlight unit can provide the luminous infrared light of even face, need not punch on the display module assembly just can realize the detection and the discernment to the external object under the screen, has better whole visual effect and user experience simultaneously.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention;

fig. 2 is a schematic view of a diffusion sheet according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a transmittance curve of a reflective sheet according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an embodiment of the present invention;

fig. 5 is a schematic view of an embodiment of the present invention;

fig. 6 is a schematic diagram of an embodiment of the present invention.

Detailed Description

In the detailed description of the embodiments of the present invention, it is to be understood that when a substrate, a frame, a sheet, a layer, or a pattern is referred to as being "on" or "under" another substrate, another sheet, another layer, or another pattern, it can be "directly" or "indirectly" on the other substrate, the other sheet, the other layer, or the other pattern, or one or more intervening layers may also be present. The thickness and size of each layer in the drawings of the specification may be exaggerated, omitted, or schematically represented for clarity. Further, the sizes of the elements in the drawings do not completely reflect actual sizes.

In one embodiment of the present invention, an infrared backlight unit includes a transmitting unit for transmitting an infrared beam, which can be used to detect biometric information of an external object, or to draw an image of the external object, or to detect a change in spatial coordinates of the external object; the light guide layer comprises a side surface and an upper surface which are connected, and is used for enabling the infrared light beams to enter the light guide layer from the side surface and to be emitted from the upper surface; and the receiving unit is arranged below the infrared backlight unit and can receive the infrared light beams reflected by an external object through the infrared backlight unit.

The infrared backlight unit further comprises a diffusion sheet and/or a prism sheet, wherein the diffusion sheet is used for diffusing the infrared light beams and the prism sheet is used for increasing the brightness of the infrared light beams within the corresponding angle of the detection range, the prism sheet is sequentially arranged on the light guide layer, the infrared backlight unit can transmit and receive the infrared light beams through one display module, and the infrared light beams can be used for biological characteristic detection of external objects.

The infrared backlight unit is provided with an opening corresponding to the receiving unit, and the receiving unit receives infrared beams reflected by an external object through the opening. The transmitting unit is arranged close to one side face of the light guide layer, the light guide layer is provided with a first opening corresponding to the receiving unit, and a light shielding layer is arranged on the inner side of the first opening and can prevent the infrared light from penetrating through the light shielding layer.

The infrared backlight unit further comprises a reflecting layer arranged below the light guide layer, the reflecting layer is provided with a second opening corresponding to the receiving unit, the light shielding layer is arranged on the inner side of the second opening and made of opaque materials, the light shielding layer is tightly attached to a backlight module arranged above the infrared backlight unit and can be used for blocking infrared light beams from directly entering the receiving unit without being reflected by an external object and reducing external stray light from entering the receiving unit. The reflecting layer is used for reflecting part of infrared beams which enter the light guide layer from the side face of the light guide layer and are emitted from the lower portion of the light guide layer and then enter the light guide layer.

In an embodiment of the present invention, a detection module comprises the above-mentioned infrared backlight unit and a receiving unit disposed below the infrared backlight unit, the detection module can receive and/or transmit infrared light beams through a display module.

One aspect of the present invention discloses a backlight module, a detection module disposed below the backlight module can transmit and receive infrared light beams through the backlight module, the backlight module comprises a light guide plate, a reflector plate arranged below the light guide plate, a diffusion plate arranged above the light guide plate, and a backlight source arranged on one side of the light guide plate, the backlight light source is used for providing backlight beams for image display, the light guide plate comprises a light emergent surface opposite to the diffusion sheet and a light incident surface connected with the light emergent surface, the light guide plate is used for receiving backlight beams from a backlight light source from the light incident surface and emitting the backlight beams from the light emitting surface, the reflector plate is used for reflecting part of backlight beams emitted from the bottom of the light guide plate into the light guide plate and transmitting the infrared beams. The diffusion sheet comprises one of a quantum dot film, a nano porous film, polyethylene terephthalate or other polyester compounds, and the transmittance of the diffusion sheet to the infrared light beams is more than 50%. The reflective sheet is formed by stacking multilayer optical films having different refractive indexes for infrared light and infrared light beams, and the reflectivity of the reflective sheet to visible light is larger than 90% and the transmissivity to the infrared light beams is larger than 90% through optical modulation.

The utility model discloses an in one embodiment, a display device includes display module assembly and the detection module assembly of setting in the display module assembly below, display module assembly can launch the backlight beam who is used for showing, it can see through to detect the module assembly the display module assembly launches and receives infrared light beam, it is foretell detection module assembly to detect the module assembly. The display module comprises a display panel and a backlight module arranged below the liquid crystal display panel, the backlight module is arranged as above, the detection module is arranged below the backlight module, infrared light beams emitted by the detection module sequentially penetrate through the backlight module and the display panel to be emitted to the outside, and are reflected by an external object and then sequentially penetrate through the display panel and the backlight module to reach the detection module.

In an embodiment of the present invention, an electronic device includes the infrared backlight unit, the detecting module, the backlight module, or the display device.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a display device 1 includes a display module 20 and a detection module 10 disposed below or at the back of the display module 20. The detection module 10 can transmit and receive infrared light beams 101 through the display module 20.

In this embodiment, the detection module 10 can transmit an infrared beam to the surface or outside of the display module 20 through the display module 20, and receive the infrared beam reflected by the external object 1000 through the display module 20. The display module 20 can be used for displaying images and can provide a contact or non-contact human-computer interaction interface for a user.

The detection module 10 includes an infrared backlight unit 11 and a receiving unit 13 disposed below the infrared backlight unit 11. The infrared backlight unit 11 can provide a uniform surface-emitting infrared light beam 101. The receiving unit 13 is capable of receiving the infrared light beam 101 reflected by the external object 1000 through the infrared backlight unit 11 and the display module 20.

The infrared backlight unit 11 includes a light guide layer 111 having a substantially flat plate-like structure and an emission unit 12 disposed at one side surface of the light guide layer 111. The emission unit 12 is disposed adjacent to the light guide layer 111 for emitting the infrared light beam 101. The light guiding layer 111 comprises a side surface (not numbered) and an upper surface (not numbered) connected to each other, for allowing the infrared light beam 101 to enter the light guiding layer 111 from the side surface of the light guiding layer 111 and to exit divergently from the upper surface of the light guiding layer 111. The emission unit 12 is disposed adjacent to a side of the light guide layer 111. The receiving unit 13 is disposed below the infrared backlight unit 11, and is configured to receive the infrared light beam 101 reflected by the external object 1000 through the infrared backlight unit 11.

In this embodiment, the infrared backlight unit 11 further includes a reflective layer 112 disposed below the light guide layer 111. After the infrared light beam 101 emitted by the emitting unit 12 enters the light guide layer 111, part of the infrared light beam 101 is reflected and/or refracted and then exits from the upper surface of the light guide layer 111 to the lower part of the display module 20, and can pass through the display module 20 to reach the outer surface of the display module 20 or the outer part of the display module 20. The infrared light beam 101 is reflected by an external object 1000 and then can be received by the receiving unit 13 through the display module 20 and the infrared backlight unit 11.

In this embodiment, the infrared light beam 101 can be used for two-dimensional and/or three-dimensional image rendering of an external object, or for two-dimensional and/or three-dimensional biometric recognition of an external object.

In this embodiment, the infrared light beam 101 is infrared light. In other modified embodiments, the infrared light beam 101 may also be visible light, invisible light, electromagnetic wave, ultrasonic wave, or ultraviolet light.

The infrared backlight unit 11 has an opening 114 corresponding to the receiving unit 13, and the receiving unit 13 receives the infrared beam 101 reflected by the external object 1000 through the opening 114. Specifically, the infrared backlight unit 11 includes an emission unit 12, a light guide layer 111, and a reflection layer 112 disposed below the light guide layer 111. In this embodiment, the light guide layer 111 has an upper surface and a lower surface opposite to each other, and four side surfaces surrounding the upper surface and the lower surface. The emitting unit 12 is disposed adjacent to one side surface (not numbered) of the light guiding layer 111, the light guiding layer 111 has a first opening (not numbered) corresponding to the receiving unit 13, the reflecting layer 112 has a second opening (not numbered) corresponding to the receiving unit 13, the first opening and the second opening together form the opening 114, a light shielding layer 113 is disposed inside the opening 114, and the light shielding layer 113 can prevent the detection light 101 from passing through.

In a modified embodiment of the above embodiment, the infrared backlight unit 11 may further include a Diffusion Sheet (Diffusion Sheet) for diffusing the infrared light beam 101 and/or a Prism Sheet (Prism Sheet) for increasing the brightness of the infrared light beam 101 in a detection range corresponding angle, which are sequentially disposed on the light guide layer 111. The detection range corresponds to an angle range such as, but not limited to, an angle range of 60 degrees, or an angle range of 70 degrees, or an angle range of 80 degrees, etc., with respect to the normal of the prism sheet.

In this embodiment, the apertures of the first opening and the second opening are different in size, the aperture of the first opening is smaller than the aperture of the second opening, and the light shielding layer 113 covers a step surface formed at a joint of the first opening and the second opening due to the aperture difference.

In this embodiment, the emitting unit 112 may include one or more light emitting elements, such as but not limited to a Light Emitting Diode (LED), a Vertical Cavity Surface emitting laser (Vertical Cavity Surface emitting laser), or other light emitting devices. The receiving unit 13 may comprise an infrared image sensor capable of receiving infrared light beams and converting them into corresponding electrical signals. In other or modified embodiments, the receiving unit 13 may include a visible light image sensor, or other types of photoelectric conversion chips.

The transmitting unit 12 and the receiving unit 13 shown in fig. 1 are schematic representations only, and do not represent any limitation of the transmitting unit 12, the receiving unit 13, and the shape, structure, and positional relationship therebetween.

In other or modified embodiments of the present invention, the aperture of the first opening and the second opening may be the same, or the aperture of the first opening is larger than the aperture of the second opening.

The display module 20 includes a display panel 21 and a backlight module 22 disposed below the display panel 21. The display panel 21 can be used for image display, and the backlight module 22 can provide the display panel 21 with a backlight beam for image display. In this embodiment, the backlight beam is, for example, but not limited to, visible light.

The display panel 21 includes a panel layer 211 and a protective layer 212 disposed on the panel layer. The backlight module 22 includes a light guide plate 222, a reflective sheet 221 disposed below the light guide plate 222, a diffusion sheet 223 disposed above the light guide plate 222, and a backlight source 224 disposed adjacent to a side surface of the light guide plate 222. The detection module 10 is disposed below the reflective sheet 221. The display panel 21 is disposed above the diffusion sheet 223. The backlight light source 224 is used for providing a backlight beam required for image display to the display panel 21. The light guide plate 222 includes a light exit surface (not numbered) opposite to the diffusion sheet 223 and a light entrance surface (not numbered) connected to the light exit surface, and the light guide plate 222 is configured to receive the backlight beam from the backlight source 224 from the light entrance surface and emit the backlight beam from the light exit surface. The reflective sheet 221 is used for reflecting a part of the backlight beam emitted from the bottom of the light guide plate 222 into the light guide plate 222 and transmitting the infrared beam 101. The diffusion sheet 223 is used for diffusing the backlight beam emitted from the light-emitting surface of the light guide plate 222, so that the backlight beam enters the display panel 21 more uniformly and divergently.

In this embodiment, the light shielding layer 113 is disposed close to the reflective sheet 221, so that the infrared light beam 101 can be effectively prevented from directly entering the receiving unit 13 from the emitting unit 12, and interference of external stray light and reflected light from the display panel 21 and the reflective sheet 221 can be reduced.

In this embodiment, the diffusion sheet 223 includes one of a quantum dot film, a nano porous film, polyethylene terephthalate, or other polyester compounds.

Referring to fig. 2, when the diffusion sheet 223 includes a quantum dot film, the diffusion sheet 223 includes a base 2231 and a plurality of quantum dots 2232 disposed in the base 2231. The backlight light beam provided by the backlight light source 224 may be blue light, a portion of which can be converted by the quantum dots 2232 in the quantum dot film into red light and green light, which can be mixed to form white light, which can be used for image display of the display panel 21. In a modified embodiment of this embodiment, the backlight light sources 224 can emit ultraviolet light, the diffusion sheet 223 can convert the ultraviolet light from the backlight light sources 224 into red light, green light, and blue light, and the converted red light, green light, and blue light can be mixed into white light and supplied to the display panel 21 for image display.

As shown in fig. 2, in the present embodiment and the modified embodiments, the diffusion sheet 223 has a better transmittance for the infrared light beam 101, for example, but not limited to, when the infrared light beam 101 is infrared light, the transmittance of the diffusion sheet 223 for the infrared light beam 101 is greater than 50%.

In this embodiment, the panel layer 211 includes two substrates disposed opposite to each other and a liquid crystal layer disposed between the two substrates. The display panel 21 is a liquid crystal display panel. The protective layer 212 is a cover glass. The display panel 21 can transmit the infrared light beam 101, and the substrate, the liquid crystal layer and the cover glass of the display panel 21 have better transmittance for the infrared light beam 101.

In this embodiment, the reflective sheet 221 can reflect visible light and transmit the infrared light beam 101. For example, but not limiting of, the reflective sheet 221 is formed by a stack of multilayer optical films having different refractive indices for infrared light beams 101 and visible light, the reflective sheet having a reflectance of greater than 90% for visible light, a transmittance of less than 0.1% for visible light, and a transmittance of greater than 90% for infrared light beams 101 by optical modulation.

Referring to fig. 3, in an embodiment of the present invention, the transmittance of the reflective sheet 221 to infrared light with a wavelength of 900nm to 1000nm is greater than 90%, and the transmittance to visible light is less than 0.1%.

In the embodiment or the modified embodiment, the infrared light beam 101 may include one or more of flood light (flood light, light beam that the illumination area of flood light finger is wider and the illumination angle is divergent), speckle structured light, coded structured light, and modulated pulse signal.

Please refer to fig. 4, which is a schematic diagram of a modified embodiment of the display device 1 shown in fig. 1. In this embodiment, the receiving unit 13 and the transmitting unit 12 are disposed below the display module 20 adjacent to the bottom of the display module 20. The transmitting unit 12 transmits the infrared light beam 101 to the display module 20, then reflects the infrared light beam by an external object, and transmits the infrared light beam to the display module 20 again to be received by the receiving unit 13, and can be used for detecting the biological characteristics of the external object, or drawing an image of the external object, or detecting the spatial coordinate changes such as the motion or distance of the external object.

Please refer to fig. 5, which is a schematic diagram of a modified embodiment of the display device 1 shown in fig. 1. In this embodiment, the emitting unit 12 is disposed below the display module 20 adjacent to the bottom of the display module 20 (the bottom viewed from the front of the display device 1 in fig. 5). The number of the receiving units 13 is two, and the receiving units 13 are arranged below the display module 20 adjacent to the top of the display module 20. In the present embodiment, the two receiving units 13 are capable of receiving the infrared light beams 101 reflected by the external object 1000, respectively, and obtaining three-dimensional biometric information of the external object 1000 through Binocular Stereo Vision (Binocular Stereo Vision), or drawing a three-dimensional image of the external object, or detecting a change in coordinates such as a direction and a distance of the external object in a three-dimensional space.

Fig. 6 is a schematic diagram of a modified embodiment of the display device 1 shown in fig. 1. In this embodiment, the receiving unit 13 is disposed below the display module 20 adjacent to a side surface of the display module 20 (located at a bottom position in fig. 6 when viewed from the front of the display module 20). The number of the emission units 12 is two, and the two emission units are respectively arranged on two sides of the bottom of the display module 20.

In the above embodiment or modified embodiment, the detecting module 20 may further include a processor (not shown), and the processor may obtain two-dimensional information and/or depth information of the external object 1000 according to the infrared beam 101 received by the receiving unit 13. Further, the processor also stores the biometric information data in advance, and the processor can detect and identify the biometric information of the external object by comparing the obtained two-dimensional information and/or depth information of the external object 1000 with the biometric information data stored in advance, such as but not limited to: fingerprint recognition, face recognition, iris recognition, and the like.

By detecting and identifying the biological characteristics of the external object 1000, the detection module 10 can be applied to various products and application scenarios such as locking or unlocking of the display device 1, online payment service verification, authentication of a financial system or a public security system, passage verification of an access control system, and the like.

Therefore, the display device 1 can be used for two-dimensional and/or three-dimensional biometric detection and recognition of an external object, or for two-dimensional and/or three-dimensional image rendering of an external object, or for two-dimensional and/or three-dimensional spatial coordinate detection of an external object.

In the embodiments and variations of the present invention, the external object 1000 includes, but is not limited to, a finger (fingerprint), an iris, a face, and the like.

In the above or modified embodiments of the present invention, the positions and the numbers of the transmitting unit 12 and the receiving unit 13 may have different settings, which is not limited by the present invention.

The utility model also provides an infrared backlight unit, infrared backlight unit includes the infrared backlight unit 11 of the description in above-mentioned embodiment and the change embodiment, it can be used in display device 1 or its change embodiment.

The utility model also provides a detection module, detection module includes above-mentioned detection module 10 or its change embodiment, and it can be used to display device 1 or its change embodiment.

The utility model also provides a backlight module, backlight module can arrange above-mentioned detection module group and use. The backlight module includes the backlight module 22 or its modified embodiment, which can be used in the display device 1 or its modified embodiment.

The utility model also provides an electronic equipment, electronic equipment includes above-mentioned display device 1 or its modified embodiment. The electronic device may be a mobile phone, a tablet computer, a smart watch, an augmented reality/virtual reality device, a human action detection device, an autonomous vehicle, a smart home device, a security device, an intelligent robot or other electronic devices having a biometric identification capability for objects.

Compared with the prior art, the utility model discloses infrared backlight unit 11, detection module assembly 10, backlight unit 20, display device 11 and electronic equipment use detection module assembly 10 to see through display module assembly 20 transmission and receive infrared beam to use infrared backlight unit 11 to provide the luminous infrared beam of even face. The detection and identification of the external object 1000 can be realized under the screen without punching on the display module 20, and meanwhile, the better overall visual effect and the user experience are achieved.

It should be noted that, those skilled in the art can understand that, without creative efforts, some or all of the embodiments of the present invention, and some or all of the deformation, replacement, alteration, split, combination, extension, etc. of the embodiments should be considered as covered by the inventive idea of the present invention, and belong to the protection scope of the present invention.

Any reference in this specification to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature or structure is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature or structure in connection with other ones of the embodiments.

The references to "length", "width", "upper", "lower", "front", "rear", "back", "front", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. as used herein are intended to refer to the orientation or positional relationship shown in the drawings, and are intended to facilitate the description of the embodiments and to simplify the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Like reference numbers and letters refer to like items in the figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance. In the description of the present invention, "plurality" or "a plurality" means at least two or two unless specifically defined otherwise. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, "disposed," "mounted" or "connected" is to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The terms used in the following claims should not be construed to limit the invention to the specific embodiments disclosed in the specification. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (11)

1. An infrared backlight unit, comprising:

a transmitting unit for transmitting an infrared beam, the infrared beam being capable of being used for detecting external object biometric information, and/or drawing an image of an external object, and/or detecting external object spatial coordinate changes;

the light guide layer comprises a side surface and an upper surface which are connected, and is used for enabling the infrared light beams to enter the light guide layer from the side surface and to be emitted from the upper surface; wherein one receiving unit disposed below the infrared backlight unit is capable of receiving the infrared light beam reflected by an external object through the infrared backlight unit.

2. The infrared backlight unit of claim 1, further comprising a diffusion sheet for diffusing the infrared light beam and/or a prism sheet for increasing the brightness of the infrared light beam within a corresponding angle of a detection range, which are sequentially disposed on the light guide layer, wherein the infrared backlight unit is capable of transmitting and receiving the infrared light beam through one display module, and the infrared light beam can be used for biometric detection of an external object.

3. The infrared backlight unit of claim 1, wherein the infrared backlight unit has an opening corresponding to a receiving unit capable of receiving an infrared beam reflected from an external object through the opening.

4. The infrared backlight unit as set forth in claim 1, wherein the emitting unit is disposed adjacent to one side surface of the light guiding layer, the light guiding layer has a first opening corresponding to one receiving unit, and a light shielding layer is disposed inside the first opening and prevents the infrared light beam from passing therethrough.

5. The infrared backlight unit as claimed in claim 4, further comprising a reflective layer disposed below the light guide layer, wherein the reflective layer has a second opening corresponding to the receiving unit, the light shielding layer is disposed inside the second opening and is made of opaque material, and the light shielding layer is disposed adjacent to a backlight module disposed above the infrared backlight unit and is capable of blocking the infrared light beam from directly entering the receiving unit without being reflected by an external object and reducing external stray light from entering the receiving unit.

6. The infrared backlight unit of claim 5, wherein the reflective layer is configured to reflect a portion of the infrared beam entering the light guide layer from a side of the light guide layer and exiting from below the light guide layer to enter the light guide layer.

7. An inspection module, comprising the infrared backlight unit of any one of claims 1 to 6, and a receiving unit disposed below the infrared backlight unit, wherein the inspection module is capable of receiving and/or emitting infrared light beams through a display module.

8. A backlight module is characterized in that a detection module arranged below the backlight module can transmit and receive infrared light beams through the backlight module, the backlight module comprises a light guide plate, a reflector plate arranged below the light guide plate, a diffusion plate arranged above the light guide plate and a backlight source arranged on one side face of the light guide plate, the backlight source is used for providing backlight light beams for image display, the light guide plate comprises a light emergent face opposite to the diffusion plate and a light incident face connected with the light emergent face, the light guide plate is used for receiving the backlight light beams from the backlight source from the light incident face and emitting the backlight light beams from the light emergent face, and the reflector plate is used for reflecting part of the backlight light beams emitted from the bottom of the light guide plate into the light guide plate and transmitting the infrared light beams.

9. A display device, characterized in that, includes display module assembly and sets up the detection module assembly in the display module assembly below, the display module assembly can launch the light beam in a poor light that is used for showing, the detection module assembly can see through the display module assembly transmission and receive infrared light beam, the detection module assembly be claim 7 the detection module assembly.

10. The display device according to claim 9, wherein the display module comprises a display panel and a backlight module disposed below the display panel, the backlight module is as set forth in claim 8, the detection module is disposed below the backlight module, and the infrared light beam emitted by the detection module sequentially passes through the backlight module and the display panel to exit to the outside, and is reflected by an external object and then sequentially passes through the display panel and the backlight module to reach the detection module.

11. An electronic device, comprising the infrared backlight unit of any one of claims 1 to 6, or the detection module of claim 7, or the backlight module of claim 8, or the display device of claim 9 or 10.

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