CN210155678U - Biological characteristic detection module - Google Patents

Abstract

The utility model discloses a biological characteristic detection module, biological characteristic detection module can see through a backlight unit transmission and/or receive measuring beam, measuring beam is used for the detection and the discernment of the biological characteristic information of external object, backlight unit can change the wavelength of backlight beam and disperse the backlight beam by the converted wavelength to mix the backlight beam of different wavelengths and provide a display panel for white light. The utility model discloses biological characteristic detects module has better visual effect.

Description

Biological characteristic detection module

Technical Field

The utility model relates to the field of photoelectric technology, especially, relate to a biological characteristic detects module.

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 features under a screen has come into use, that is, a biological feature detection module is placed below a display screen, and biological feature detection is achieved by sending or receiving detection light beams through the display screen. However, for non-self-emissive types of display screens, such as liquid crystal display screens, the under-screen biometric detection needs to address the screen's problem with respect to the detection beam transmittance. 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 a be used for biological characteristic detection module under screen for solving prior art problem.

An aspect of the utility model discloses a biological characteristic detection module, biological characteristic detection module can see through a backlight unit transmission and/or receive measuring beam, measuring beam is used for the detection and the discernment of the biological characteristic information of external object, backlight unit can change the wavelength of backlight beam and disperse the backlight beam by the converted wavelength to mix the backlight beam of different wavelengths and provide a display panel for white light.

Optionally, the backlight module includes a reflection sheet adjacent to the biometric detection module, a light guide plate disposed on the reflection sheet, a backlight disposed on one side of the light guide plate, and a diffusion film disposed on the light guide plate, where the backlight is configured to emit visible light and enter the diffusion film through a light exit surface of the light guide plate, and the diffusion film is capable of changing a wavelength of a part of light beam entering the diffusion film, then divergently transmitting through the diffusion film, and allowing a part of light beam entering the diffusion film to directly transmit through the diffusion film.

Optionally, the biometric detection module includes a transmitting unit and a receiving unit, when the biometric detection is performed, the detection light beam transmitted by the transmitting unit sequentially passes through the reflective sheet, the light guide plate and the diffusion film, then is emitted to an optical sheet, and further can be emitted to the outside of the backlight module, and the detection light beam reflected by the external object can sequentially pass through the optical sheet, the diffusion film, the light guide plate and the reflective sheet and then reaches the receiving unit, and the biometric detection module collects two-dimensional or three-dimensional biometric information of the external object according to the received detection light beam, thereby realizing the biometric detection and identification.

Optionally, the diffusion barrier is including setting gradually infrabasal plate, diffusion barrier and upper substrate on the light guide plate, upper and lower infrabasal plate are the printing opacity material and make, the diffusion barrier includes a plurality of diffusion particles that are used for changing the light beam wavelength, and the entering detection beam of diffusion barrier can pass through the interval between the diffusion particle the diffusion barrier, and the entering the partly of the visible light beam of the backlight emission of diffusion barrier passes through the interval between the diffusion particle sees through the diffusion barrier, and another part quilt see through after diffusion particle lengthens its wavelength and diverges outgoing angle the diffusion barrier.

Optionally, the backlight can emit blue or ultraviolet light, the diffusing particles can convert a portion of the blue light from the backlight into red and green light, and the converted red and green light and the unconverted blue light can be mixed into white light; or the diffusing particles can convert ultraviolet light from a backlight into red, green, and blue light, which can be mixed into white light.

Optionally, the detection light beam includes infrared light, the reflector plate can reflect visible light and transmit infrared light, and the reflector plate and the biological characteristic detection module are arranged closely or at intervals.

Optionally, the biometric characteristic detection module includes emission unit and receiving element, the emission unit can see through a backlight unit transmission detection light beam to external object on or directly transmit detection light beam to external object, the receiving element can see through backlight unit receives by external object reflection detection light beam, backlight unit to backlight beam's diffuse action be greater than to detection light beam's diffuse action.

Optionally, the biometric characteristic detection module includes an emitting unit and a receiving unit, and the detection light beam emitted by the emitting unit can be reflected by an external object and then received by the receiving unit through the backlight module.

Optionally, the receiving unit is disposed below one backlight module; the emission unit is arranged below the backlight module, or arranged on the side of the backlight module, or integrated in the backlight module, or arranged above the backlight module.

Optionally, the emission unit has at least one projection on the liquid crystal display panel, and at least a part of the projection and the backlight module do not overlap in the projection direction.

Optionally, the backlight module further includes an optical sheet disposed on the diffusion film, and the optical sheet can uniformly mix and converge backlight beams with different wavelengths transmitted through the diffusion film to form white light.

Compared with the prior art, the utility model discloses biological characteristic detection module has the backlight unit of good transmissivity through adopting to the measuring beam to need not punch on backlight unit just can realize biological characteristic detection and the discernment under the screen, have better whole visual effect and user experience, also reduced manufacturing cost from the one side. Furthermore, the utility model discloses a set up biological characteristic detection module in can changing the backlight beam wavelength and then improve the white light that diverges and can see through the backlight unit below of measuring beam, can be better through backlight unit transmission and/or receive measuring beam for biological characteristic detection effect is better under the screen.

Drawings

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

FIG. 2 is a schematic view, partially in cross-section, of the embodiment shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a portion of the diffusion membrane of the embodiment of FIG. 1;

fig. 4 is a schematic diagram of a transmittance curve of a reflector according to 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.

An embodiment of the utility model provides a biological characteristic detection module assembly, biological characteristic detection module assembly can see through a backlight unit transmission and/or receive measuring beam, measuring beam is used for the detection and the discernment of the biological characteristic information of external object, backlight unit can change the backlight beam wavelength and diverge by the backlight beam of wavelength conversion to mix the light beam of different wavelengths and provide a display panel for white light.

The backlight module comprises a reflection sheet adjacent to the biological characteristic detection module, a light guide plate arranged on the reflection sheet, a backlight source arranged on one side of the light guide plate and a diffusion film arranged on the light guide plate, wherein the backlight source is used for emitting backlight beams and enters the diffusion film through one light-emitting surface of the light guide plate, and the diffusion film can change the wavelength of a part of the light beams entering the diffusion film, then the part of the light beams divergently penetrates through the diffusion film and allows a part of the light beams entering the diffusion film to directly penetrate through the diffusion film.

The biological characteristic detection module comprises a transmitting unit and a receiving unit, when biological characteristic detection is carried out, a detection light beam transmitted by the transmitting unit sequentially passes through the reflector plate, the light guide plate, the diffusion film and the optical sheet to be emitted to the outside of the backlight module, is reflected by an external object and then sequentially passes through the optical sheet, the diffusion film, the light guide plate and the reflector plate to reach the receiving unit, and the biological characteristic detection module obtains two-dimensional or three-dimensional biological characteristic information of the external object according to the received detection light beam.

The diffusion film is including setting gradually infrabasal plate, diffusion layer and upper substrate on the light guide plate, upper and infrabasal plate are the printing opacity material and make, the diffusion layer includes a plurality of diffusion particles that are used for changing the light beam wavelength, gets into the detection beam of diffusion layer can pass through interval between the diffusion particle sees through the diffusion layer, gets into partly of the visible light beam of the backlight emission of diffusion layer passes through interval between the diffusion particle sees through the diffusion layer, another part quilt the diffusion particle is seen through after lengthening its wavelength and diverging exit angle the diffusion layer.

In this embodiment, the detection light beam may be infrared light, the reflector plate may reflect visible light and transmit infrared light, and the reflector plate and the biometric feature detection module are disposed closely or at an interval. The backlight is capable of emitting blue or ultraviolet light, the diffusing particles are capable of converting a portion of the blue light from the backlight into red and green light, and the converted red and green light and the unconverted blue light are capable of mixing into white light; or the diffusing particles can convert ultraviolet light from a backlight into red, green, and blue light, which can be mixed into white light.

The utility model discloses other embodiments still provide a backlight unit, it can be used for foretell biological characteristic detection module to see through this backlight unit and receive the measuring beam who is used for biological characteristic to detect and discern, backlight unit can provide backlight for a display panel, backlight unit can be partial the wavelength of the backlight beam of the specific wavelength of conversion and disperse the backlight beam by the conversion wavelength to mix the backlight beam of different wavelengths and provide a display panel for white light.

Other embodiments of the present invention further provide an electronic device including the above biological feature detecting module. Specifically, be in including display and setting the biological characteristic detection module assembly of display below, the display includes backlight unit and display panel, backlight unit sets up the display panel below, biological characteristic detection module assembly is close to backlight unit sets up, biological characteristic detection module assembly is foretell biological characteristic detection module assembly, biological characteristic detection module assembly can pass through thereby detection beam's detection and discernment to external object biological characteristic information is realized to backlight unit and display panel transmission and/or receipt detection beam, backlight unit can be used for becoming the backlight beam of the shorter wavelength in it has different longer wavelengths and with the backlight beam mixing of different wavelengths becomes white light and provides display panel's while, allows detection beam passes through.

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 and 2, in an embodiment of the present invention, an electronic device includes a liquid crystal display 1 and a biometric feature detection module 2 disposed below the liquid crystal display 1. The liquid crystal display 1 comprises a backlight module 10 and a liquid crystal display panel 11, wherein the backlight module 10 is arranged below the liquid crystal display panel 11. The biometric detection module 2 is disposed adjacent to the backlight module 10 and below the backlight module 10. The biometric detection module 2 is at least partially disposed under the backlight module 10. The biometric detection module 2 is capable of emitting and/or receiving a detection light beam through the liquid crystal display 1.

The biometric detection module 2 comprises a transmitting unit 21 and a receiving unit 22. The transmitting unit 21 and the receiving unit 22 may be separate chip units or integrated into one chip unit, and the transmitting unit 21 and the receiving unit 22 are only schematically shown in fig. 1 and do not represent any limitation of the shape, structure and positional relationship between the transmitting unit 21 and the receiving unit 22.

In the embodiment and the modified embodiment of the present invention, the receiving unit 22 may be disposed below the backlight module 10; the emitting unit 21 is disposed below the backlight module 10, or disposed at a side of the backlight module, or integrated in the backlight module 10, or disposed above the backlight module 10. For example, but not limited to, the emitting unit 21 and the backlight module 10 are disposed at a distance from or closely beside the backlight module 10. The side direction includes, but is not limited to, a side direction, or a side direction, where the side direction is understood to mean that at least one projection exists on the liquid crystal display panel 11, and at least a part of the projection and the backlight module do not overlap in the projection direction. For another example, the emission unit 21 is disposed in the liquid crystal display panel 11 without overlapping, for example, under a glass cover plate substantially flush with the liquid crystal display panel 11.

In the embodiment and the modified embodiment of the present invention, the detection light beam emitted by the emitting unit 21 can be reflected by an external object (for example, a finger or a face) and then received by the receiving unit 22 through the backlight module 10.

In a further embodiment, when the biometric feature detection module 2 is used for fingerprint detection and identification, the transmitting unit 21 and the receiving unit 22 are both disposed below the backlight module 10.

In a further embodiment, when the biometric feature detection module 2 is used for face detection and recognition, the transmitting unit 21 is disposed on the side or above the backlight module, or the transmitting unit is integrated in the backlight module; the receiving unit 22 is disposed under the backlight module 10.

Referring to fig. 5, in a modified embodiment of the electronic device shown in fig. 1, the emitting unit 21 is disposed in a part of the droplet-shaped non-display region on the top of the liquid crystal display panel 11 (such a display panel is commonly referred to as a "water droplet screen" or "beauty tip"). The emission unit is located under a glass cover plate (not shown) that covers the liquid crystal display panel 11 and the emission unit 21. The receiving unit 22 is disposed under the backlight module 10. At this time, the electronic device can be used for face detection and recognition.

Referring to fig. 6, in a modified embodiment of the electronic device shown in fig. 1, the transmitting unit 21 and the receiving unit 22 are both disposed below the backlight module 10, and the electronic device can be used for fingerprint or face detection and identification.

The biometric detection module 2 is capable of emitting and/or receiving a detection light beam through the backlight module 10. The emitting unit 21 can emit a detection beam to an external object through the backlight assembly 10 or directly emit a detection beam to an external object, and the receiving unit 22 can receive the detection beam reflected by the external object through the backlight assembly 10. The receiving unit 22 can also receive other light beams emitted or reflected by an external object through the backlight module 10. The diffusion effect of the backlight module 10 on the backlight light beam is greater than the diffusion effect on the detection light beam. The detection beam can be used for detection and identification of biometric information of an external object.

For convenience of description and clarity of understanding, the emitting unit 21 can be used to emit the first detection light beam 101, and the first detection light beam 101 can be emitted to the outside through the liquid crystal display 1. The receiving unit 22 can be used to receive a second detection light beam 102, and the second detection light beam 102 can include a light beam that is transmitted through the liquid crystal display 1 to the receiving unit 22. For example: the second detection beam 102 may include the first detection beam 101 reflected by an external object, and the reflected light passes through the liquid crystal display panel 11 and the backlight module 10 and then reaches the receiving unit 22. In this case, the second detection beam 102 is substantially a reflected beam of the first detection beam 101 on an external object. The biometric detection module 2 can obtain two-dimensional and/or three-dimensional image information or biometric information of an external object by the emitting unit emitting the first detection light beam 101 and the receiving unit 22 receiving the second detection light beam 102. The external object may be a finger, a face, an iris or other object with recognizable biometric features of the user.

Furthermore, the second detection beam 102 may also comprise other beams emitted or reflected by external objects instead of the reflected beam of the first detection beam 101. For example, the second detection beam 102 may further include visible light emitted or reflected by an external object, and the receiving unit 22 may further receive the second detection beam 102 of the visible light reflected by the external object so as to obtain visible light image information of the external object.

The biometric detection module 2 can acquire two-dimensional image information or biometric information of the external object by collecting the second light beam 102 reflected or emitted by the external object. The biometric detection module 2 may further comprise a processor (not shown) capable of calculating a shift of the second detection beam 102 with respect to the first detection beam 101 to obtain depth information of the external object. Further, the processor also stores the biological feature information data in advance, and the processor can realize the biological feature detection and identification of the external object by comparing the obtained two-dimensional information and/or depth information of the external object with the biological feature 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, the biological characteristic detection module 2 can be applied to various products and application scenes such as locking or unlocking of an electronic device (such as a mobile phone), online payment service verification, identity verification of a financial system or a public security system, passage verification of an access control system and the like.

As shown in fig. 1 and 2, the backlight module 10 includes a reflective sheet 110, a light guide plate 120 disposed on the reflective sheet, a backlight 150 disposed on one side of the light guide plate, a diffusion film 130 disposed on the light guide plate 120, and an optical sheet 140 disposed on the diffusion film 130. The backlight 150 is used for emitting a backlight beam and entering the diffusion film 130 through a light-emitting surface of the light guide plate 120 (the surface of the light guide plate 120 adjacent to the diffusion film 130 in fig. 2). The diffusion film 130 is capable of changing the wavelength of a part of the light beam entering the diffusion film 130 and transmitting the part of the light beam entering the diffusion film 130, and allowing a part of the light beam to directly transmit. For example: the diffusion film 130 is capable of changing a backlight beam of a shorter wavelength into a backlight beam having a different longer wavelength. The backlight module 10 can partially convert the wavelength of the backlight beam with a specific wavelength and diverge the backlight beam with the converted wavelength.

Note that, the backlight beams mentioned in the present invention may refer to the light beams emitted from the backlight source 150 in the backlight module 10, the light beams emitted from the backlight source 150 whose wavelength is changed by the diffusion film 130, and may also refer to white light formed by mixing the backlight beams with different wavelengths. All of these backlight beams function to provide the liquid crystal display panel 11 with illumination light beams necessary for display.

The optical sheet 140 can uniformly mix and converge the backlight beams with different wavelengths transmitted through the diffusion film 130 to form white light, and provide the white light to the liquid crystal display panel 11 as display illumination.

In the embodiment or the modified embodiment, the optical sheets 140 may include one or more diffusion sheets for uniform mixing of light beams, or one or more prism sheets for condensing and brightness enhancement of light beams, or the optical sheets 140 may include a combination of a diffusion sheet and a prism sheet.

In the embodiment and the modified embodiment, the optical sheet 140 may include one or more Diffusion sheets (DF) for uniform mixing of light beams, or one or more Brightness Enhancement Films (BEF) for light beam convergence and Brightness Enhancement, or a combination of the Diffusion sheets and the Brightness Enhancement films. For example, the optical sheet 140 may include a lower diffusion sheet, a lower brightness enhancement sheet and an upper brightness enhancement sheet sequentially arranged from bottom to top; or the optical sheet 140 includes a lower diffusion sheet, a lower brightness enhancement sheet, an upper diffusion sheet and an upper brightness enhancement sheet sequentially arranged from bottom to top. The structure and composition of the optical sheet 140 are merely schematically illustrated in the present specification and the drawings, and are not limited thereto.

In this embodiment, the optical sheet 140 illustrated in fig. 1 includes a lower prism sheet 141 disposed on the diffusion film 130 and an upper prism sheet 142 disposed on the lower prism sheet 141. The reflective sheet 110 is used for reflecting the backlight beam emitted from the backlight source 150 to the light guide plate 120, the light guide plate 120 includes a light-emitting surface adjacent to the diffusion film 130, and the light guide plate 120 is used for forming the backlight beam emitted from the backlight source 150 into a surface light source to be emitted from the light-emitting surface. The reflective sheet 110 and the biometric characteristic detection module 2 are closely attached or spaced.

In this embodiment, the first light beam 101 and the second light beam 102 are invisible light, preferably infrared light with a wavelength range of 850-1000 nanometers (nm). In other or modified embodiments, the first light beam 101 and the second light beam 102 may be one or more of visible light, invisible light, ultraviolet light, infrared light, ultrasonic waves, electromagnetic waves, and the like.

In the embodiment or the modified embodiment, the first detecting beam 101 or the second detecting beam 102 may be one or more of floodlight, speckle structured light, coded structured light, and modulated pulse signal.

In the embodiment or the modified embodiment of the present invention, the number of the transmitting units 21 of the biometric detection module 2 may be one or more, the number of the receiving units 22 may be one or more, and the transmitting units 21 and the receiving units 22 may be used to draw a two-dimensional and/or three-dimensional image of an external object based on Time of Flight (TOF), Structured Light (Structured Light), Binocular Stereo Vision (Binocular Stereo Vision), and other technologies, or to collect and identify two-dimensional and/or three-dimensional biometric information of the external object, such as fingerprint identification or face identification under a screen.

In the embodiment or the modified embodiment of the present invention, the Emitting unit 21 may include a Vertical Cavity Surface Emitting Laser (VCSEL), or a Light Emitting Diode (LED), or other types of light Emitting chips. The receiving unit 22 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 22 may be a visible light image sensor, or other types of photoelectric conversion chips.

In alternative embodiments, the liquid crystal display 1 may also be other types of non-self-luminous displays, or other self-luminous displays, and the liquid crystal display panel 11 may also be other types of display panels. The present invention is not limited thereto.

Fig. 3 is an enlarged cross-sectional view of a portion of the diffusion film 130. The diffusion film 130 includes a lower substrate 131, a diffusion layer 132, and an upper substrate 133 sequentially disposed on the light guide plate 120. The diffusion layer 132 is disposed between the upper substrate 133 and the lower substrate 131, and the upper substrate 133 and the lower substrate 131 protect the diffusion layer 132. The upper and lower substrates may be made of a flexible light-transmitting material. The diffusion layer 132 includes a plurality of diffusion particles 134 for changing the wavelength of the light beam. The diffusion particles 134 are uniformly distributed in the diffusion layer.

The detection beam (i.e., the first detection beam 101 or the second detection beam 102) entering the diffusion layer 132 through the lower substrate 131 or the upper substrate 133 can transmit through the diffusion layer 132 through the spaces between the diffusion particles 134 and can further exit to the outside through the upper substrate 133 or enter the receiving unit 22 through the lower substrate 131.

A part of the backlight beam 103 emitted from the backlight 150 entering the diffusion layer 132 passes through the diffusion layer 132 through the spaces between the diffusion particles 134, and the other part is made longer in wavelength by the diffusion particles 134 and is made to diverge in emission angle and then passes through the diffusion layer 132.

The backlight 150 includes a light emitting unit 151. The light emitting unit 151 may be disposed on one circuit board 152. The light emitting unit 152 may be a Light Emitting Diode (LED), and the light emitting unit 152 may be configured to emit blue light or ultraviolet light.

In this embodiment, the backlight 150 can emit blue light, the diffusion particles 134 can convert a portion of the blue light from the backlight 150 (the backlight beam 103 in fig. 3) into red light and green light, and the converted red light and green light and the unconverted blue light can be mixed into white light, as shown in fig. 3.

In a modified embodiment of this embodiment, the backlight 150 can emit ultraviolet light, the diffusion particles 134 can convert the ultraviolet light from the backlight 150 into red light, green light, and blue light, and the converted red light, green light, and blue light can be mixed into white light.

In this or a modified embodiment, the diffusion particles 134 are quantum dots comprising a nanocrystal core and a nanocrystal shell surrounding the nanocrystal core, the wavelength of the light beam entering the nanocrystal core is increased, and the diameter of the quantum dots is in the range of 1nm to 10 nm.

In other embodiments of the present invention, the diffusion film 130 is a quantum dot film having optical characteristics of changing the wavelength of the light beam and diverging the light path, for example, a part of the wavelength of the incident blue light can be lengthened and converted into red light and green light. The transmittance of the quantum dot film to infrared light is not less than 50%.

In the embodiment or the modified embodiment, the diffusion film 130 is capable of partially converting the wavelength of the backlight beam of a specific wavelength and diverging the backlight beam of the converted wavelength.

Referring to fig. 4, a graph of transmittance of a reflector plate for light beams of different wave bands is shown in a modified embodiment of the present invention. The reflective sheet is made of the same material and process as the reflective sheet 110 in the above embodiment. Therefore, the reflective sheet 110 can be nearly completely reflected with respect to visible light, has a good transmittance with respect to infrared light, and maximizes the transmittance of infrared light in the wavelength range of 900nm to 1000nm (nm represents nanometers).

In the above or modified embodiment of the present invention, the lower surface of the reflection sheet 110 is provided with an antireflection film, which can further improve the transmittance of the reflection sheet 110 to the detection beam of the infrared light.

Alternatively, in some embodiments, the brightness enhancement sheet or the prism sheet may be optionally omitted.

The utility model discloses in the above-mentioned or change embodiment, the position that biological characteristic detected module 2 set up corresponds in the middle of the liquid crystal display panel 11 bottom, perhaps biological characteristic detects module 2 and can also have different position settings, the utility model discloses do not make the restriction.

In the above or modified embodiment of the present invention, the liquid crystal display panel 11 may include two substrates disposed oppositely, and the liquid crystal layer between the two substrates, a plurality of Thin Film Transistors (TFT) disposed on the substrates, a plurality of gate lines, a plurality of data lines, a plurality of pixel electrodes, and the like, and a plurality of pixel units formed by the same and distributed in an array, and a data driving circuit, a timing control circuit, a power supply circuit, and the like.

The utility model discloses above-mentioned or in the change embodiment, electronic device can be the cell-phone, the panel computer, intelligent wrist-watch, augmented reality/virtual reality device, human action detection device, the autopilot car, intelligent household equipment, security protection equipment, intelligent robot or other have the electronic device that can be used for object biological characteristic to detect and discern.

Compared with the prior art, the utility model discloses electron device and biological characteristic detect module have the backlight unit of good transmissivity through adopting to detecting the light beam to need punch on backlight unit just can realize the biological characteristic detection and the discernment under the screen, have better whole visual effect and user experience, also reduced process cost from the one side. Furthermore, the utility model discloses a set up biological characteristic detection module in can changing the backlight beam wavelength and then improve the white light that diverges and can see through the backlight unit below of measuring beam, can be better through backlight unit transmission and/or receive measuring beam for biological characteristic detection effect is better under the screen.

Alternatively, in some embodiments, the liquid crystal display panel 11 may be replaced by another suitable type of display panel, such as an electronic paper display panel.

Further, the biometric detection module 2 may also or alternatively be used to sense the proximity or distance of an external object, draw a three-dimensional image of the external object, and so on, for example.

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. The biological characteristic detection module is characterized in that the biological characteristic detection module can transmit and/or receive detection light beams through a backlight module, the detection light beams are used for detecting and identifying biological characteristic information of an external object, and the backlight module can convert the wavelength of the backlight light beams, diffuse the backlight light beams with the converted wavelength and mix the backlight light beams with different wavelengths into white light to be provided for a display panel.

2. The assembly as claimed in claim 1, wherein the backlight module comprises a reflective sheet adjacent to the biometric detection module, a light guide plate disposed on the reflective sheet, a backlight disposed on one side of the light guide plate, and a diffuser disposed on the light guide plate, wherein the backlight is configured to emit a backlight beam and enter the diffuser through a light exit surface of the light guide plate, and the diffuser is capable of changing a wavelength of a portion of the light entering the diffuser to transmit the light through the diffuser in a divergent manner and allowing a portion of the light entering the diffuser to transmit directly.

3. The module according to claim 2, wherein the module comprises an emitting unit and a receiving unit, and when detecting the biological features, the detecting light beam emitted from the emitting unit sequentially passes through the reflective sheet, the light guide plate and the diffusion film, then exits to an optical sheet, and further exits to the outside of the backlight module, and the detecting light beam reflected by the external object can sequentially pass through the optical sheet, the diffusion film, the light guide plate and the reflective sheet, and then reaches the receiving unit, and the module collects two-dimensional or three-dimensional biological feature information of the external object according to the received detecting light beam, thereby realizing the detection and identification of the biological features.

4. The module according to claim 2, wherein the diffuser comprises a lower substrate, a diffuser layer and an upper substrate sequentially disposed on the light guide plate, the upper and lower substrates are made of transparent material, the diffuser layer comprises a plurality of diffusing particles for changing the wavelength of the light beam, the detecting light beam entering the diffuser layer can penetrate through the diffuser layer through the gaps between the diffusing particles, a part of the visible light beam emitted from the backlight source entering the diffuser layer can penetrate through the diffuser layer through the gaps between the diffusing particles, and the other part of the visible light beam is transmitted through the diffuser layer after the wavelength of the visible light beam is lengthened by the diffusing particles and the emission angle of the visible light beam is diverged.

5. The biometric detection module of claim 4, wherein the backlight is capable of emitting blue or ultraviolet light, the diffusing particles are capable of converting a portion of the blue light from the backlight to red and green light, and the converted red and green light and the unconverted blue light are capable of mixing into white light; or the diffusing particles can convert ultraviolet light from a backlight into red, green, and blue light, which can be mixed into white light.

6. The biometric detection module of claim 2, wherein the detection beam comprises infrared light, the reflective sheet is capable of reflecting visible light and transmitting infrared light, and the reflective sheet and the biometric detection module are disposed adjacent to or spaced apart from each other.

7. The biometric detection module according to claim 1, wherein the biometric detection module comprises an emitting unit and a receiving unit, the emitting unit can emit a detection beam to an external object through a backlight module or directly emit the detection beam to the external object, the receiving unit can receive the detection beam reflected by the external object through the backlight module, and the backlight module diffuses the backlight beam more than the detection beam.

8. The biometric detection module according to claim 1, wherein the biometric detection module comprises an emitting unit and a receiving unit, and the detection beam emitted by the emitting unit can be reflected by an external object and then received by the receiving unit through the backlight module.

9. The biometric detection module of claim 8, wherein the receiving unit is disposed under a backlight module; the emission unit is arranged below the backlight module, or arranged on the side of the backlight module, or integrated in the backlight module, or arranged above the backlight module.

10. The assembly of claim 8, wherein the emission unit has at least one projection on the display panel, and at least a portion of the projection and the backlight assembly have no overlap in the projection direction.

11. The assembly of claim 2, wherein the backlight module further comprises an optical sheet disposed on the diffuser film, and the optical sheet is capable of uniformly mixing and converging the backlight beams with different wavelengths transmitted through the diffuser film to form white light.

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