WO2020258767A1 - Quantum dot backlight module and electronic device - Google Patents

Quantum dot backlight module and electronic device Download PDF

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Publication number
WO2020258767A1
WO2020258767A1 PCT/CN2019/126120 CN2019126120W WO2020258767A1 WO 2020258767 A1 WO2020258767 A1 WO 2020258767A1 CN 2019126120 W CN2019126120 W CN 2019126120W WO 2020258767 A1 WO2020258767 A1 WO 2020258767A1
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Prior art keywords
quantum dot
backlight module
quantum
quantum dots
composite film
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PCT/CN2019/126120
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French (fr)
Chinese (zh)
Inventor
张小齐
卢志坚
蔡锋毅
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深圳市隆利科技股份有限公司
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Publication of WO2020258767A1 publication Critical patent/WO2020258767A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/1365—Matching; Classification
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Definitions

  • the present invention relates to the field of communication technology, and in particular to a quantum dot backlight module and electronic equipment for fingerprint recognition in an LCD screen.
  • Fingerprint sensing and matching is a reliable and widely used technology.
  • the common method of fingerprint identification involves scanning a sample fingerprint or its image and storing the image and/or unique characteristics of the fingerprint image.
  • the characteristics of the sample fingerprint can be compared with the information of the reference fingerprint already existing in the database to determine the correct identification of the user , For example for verification purposes.
  • in-display fingerprint recognition has become more and more popular due to its ease of operation and versatility, as well as its suitability for compact portable electronic devices.
  • the fingerprint recognition display device in the LCD screen obviously has a larger use scene range and better cost advantage than the fingerprint recognition display device in the OLED screen.
  • the fingerprint recognition display device in the screen based on the LCD display is not fully mature, especially Take into account the effective penetration and accurate collection of fingerprint identification signals on the LCD module.
  • the fingerprints on the glass cover 104 covered on the LCD display are recognized by pressing; however, the optical signal used to recognize the fingerprints must pass through the LCD display at least The screen and the glass cover 104, and since the LCD display is composed of the LCD module 102 and the backlight module 101, the glass cover has a certain thickness. Therefore, when the optical signal passes through the LCD module, the backlight module, and the glass cover, severe refraction, scattering, and even total reflection occur.
  • CN107644215A discloses an optical fingerprint assembly and a mobile terminal to effectively improve the clarity of fingerprint recognition.
  • An optical fiber collimation layer is arranged between a transparent cover plate and a photosensitive element.
  • the optical fiber collimation layer is used to face the transparent cover plate
  • the light emitted from the end face of the photosensitive element is converted into collimated light, which is transmitted to the photosensitive element.
  • the optical fiber collimation layer and other optical function layers increase the thickness of the LCD mobile terminal, and there is no distinction between the biological fingerprint optical signal and the display optical signal, resulting in uneven display images and low fingerprint recognition accuracy.
  • the main technical problem to be solved by the present invention is to provide a quantum dot backlight module and LCD module for fingerprint recognition in the LCD screen, which can make the fingerprint recognition signal on the LCD module without a diffuser and prism sheet. Effective penetration and accurate collection.
  • the quantum dot backlight module includes a light source and a light guide plate arranged on one side of the light source, a reflective sheet arranged below the light guide plate, and a quantum dot composite set above the light guide plate Film, a prism sheet set above the quantum dot composite film, and a fingerprint recognition device set below the quantum dot composite film to identify biological fingerprint optical signals; wherein the quantum dot composite film contains the first quantum dot and the second quantum dot .
  • the light source is a blue LED light source.
  • the red and green quantum dots with different particle sizes and or materials are irradiated by the blue LED to produce red and green fluorescence, thereby forming the three primary colors of red, green and blue (RGB), or irradiating red and yellow quantum dots to produce red and yellow Fluorescence forms the three primary colors of red, yellow and blue (RYB).
  • the infrared light is basically not absorbed or scattered by the quantum dots, so it can pass through the quantum dot composite film substantially vertically.
  • the quantum dot composite film adjusts the emitted infrared optical signal to parallel light substantially perpendicular to the plane of the quantum dot composite film, while ensuring that visible light (red, green and blue) can be uniformly scattered.
  • the quantum dot backlight module of the present invention even if the diffusion sheet and prism sheet are not provided, the infrared light signal that can be used for detection can pass through the quantum dot backlight module and be accurately transmitted to biological detection objects, such as fingerprints.
  • the feedback infrared light signal of the detection object can be folded back through the quantum dot composite film and the quantum dot backlight module in a nearly non-destructive manner, and is accurately and effectively collected by the optical sensor under the LCD screen, while maintaining the quantum dot backlight module
  • the luminous brightness and uniformity of the visible light source can realize the fingerprint recognition function of the LCD display and maintain the display effect.
  • the quantum dot backlight module of the present invention reduces the arrangement of the diffusion sheet and the prism sheet, provides more design space for the LCD display with the fingerprint recognition function in the screen, and realizes the lightness and thinness of the whole electronic device.
  • the quantum dot composite film includes a first barrier film, a quantum dot fluorescent film disposed on the first barrier film, and a second barrier film disposed on the quantum dot fluorescent film.
  • the first barrier film and the second barrier film can effectively prevent the quantum dots from being oxidized by water and oxygen in the outside air to cause fluorescence failure. Further, the first barrier film and the second barrier film completely encapsulate the quantum dot fluorescent film.
  • the quantum dot composite film is provided with a light diffusion unit for diffusing and evenly distributing visible light.
  • the first barrier film, the quantum dot fluorescent film and the second barrier film comprise polyethylene terephthalate (PET).
  • the first quantum dot and the second quantum dot include quantum dots.
  • the light-emitting layer adopts quantum dots including binary phase, ternary phase, quaternary phase quantum dots, pentad phase and various core-shell structure quantum dots.
  • alloy structure quantum dots wherein the binary phase quantum dots include at least one of CdSe, CdS, PbSe, PbS, ZnS, InP, HgS, AgS quantum dots, and the ternary phase quantum dots include Zn X Cd 1-X At least one of S/ZnS, CuInS, PbSe X S 1-X /PbS quantum dots, the quaternary phase quantum dots include CuInSeS, ZnXCd 1-X SeYS 1-Y , Zn X Cd 1-X Se/ZnS At least one of CdSe/CdS, InP/ZnS, CuInS/ZnS quantum dots, the five-element phase quantum dots include at least one of InP/ZnSeS,
  • the quantum dot backlight module further includes a prism sheet, and the prism sheet is arranged above the quantum dot composite film.
  • the quantum dot backlight module further includes a diffusion sheet, which is arranged between the quantum dot composite film and the prism sheet.
  • the quantum dot backlight module further includes an optical sensor element to transmit and/or receive a biological fingerprint optical signal; the biological fingerprint optical signal is infrared light.
  • the fingerprint identification device is arranged between the light guide plate and the reflective sheet; or the fingerprint identification device is arranged between the light guide plate and the quantum dot composite film; or the fingerprint identification device is arranged between Below the reflective sheet.
  • the fingerprint identification device is embedded in the quantum dot composite film to replace the arrangement of the fingerprint identification device under the quantum dot composite film.
  • the quantum dot backlight module of the present invention is integrated with the LCD panel, the glass cover plate and the touch screen module into an electronic device, which can be applied to LCD displays and electronic devices for fingerprint identification.
  • the quantum dot backlight module of the present invention is applied to electronic equipment for fingerprint identification, and can realize accurate identification and verification of biological fingerprint information.
  • Fig. 1 is an in-screen fingerprint identification display device of a prior art LCD display.
  • FIG. 2 is an exploded view of the quantum dot backlight module of Embodiment 1 of the present invention.
  • Example 3 is a cross-sectional structure diagram of the quantum dot composite film of Example 1 of the present invention.
  • FIG. 4 is an exploded view of the quantum dot backlight module of Embodiment 2 of the present invention.
  • FIG. 5 is an exploded view of the quantum dot backlight module of Embodiment 3 of the present invention.
  • FIG. 6 is an exploded view of the quantum dot backlight module of Embodiment 4 of the present invention.
  • the quantum dot backlight module of Embodiment 1 of the present invention includes a light source 221 and a light guide plate 220 arranged on one side of the light source 221, and a reflective sheet 210 arranged below the light guide plate 220 is arranged on the light guide plate 220
  • the reflective sheet 210 is an infrared transparent visible light reflective material. On the one hand, it can reflect the visible light emitted by the light guide plate with high reflectivity, and on the other hand, it can transmit infrared light nearly losslessly.
  • the quantum dot backlight module of this embodiment is used to detect the emitted infrared optical signal accurately propagating to the detected object for detection. On the other hand, the feedback infrared light signal of the detected object can pass through the quantum dot composite film and the quantum dot backlight nearly without damage The module is accurately and effectively collected by the optical sensor under the LCD screen to realize the fingerprint recognition function of the LCD display.
  • the quantum dot backlight module of this embodiment reduces the arrangement of diffusion sheets and prism sheets, provides more design space for the LCD display with in-screen fingerprint recognition function, and realizes the lightness and thinness of the whole electronic device.
  • the light source 221 is a blue LED light source, and the light source is a blue LED light source.
  • the red CdSeS quantum dots and green CdZnSeS quantum dots with different particle sizes and or materials are irradiated by the blue LED to generate red and green fluorescence, thereby forming the three primary colors of red, green and blue (RGB), Or irradiate red and yellow quantum dots to produce red and yellow fluorescence to form the three primary colors of red, yellow and blue (RYB).
  • the first quantum dots in the quantum dot composite film 230 are red fluorescent quantum dots, and the second quantum dots, green fluorescent quantum dots, have a particle size of 1-20 nanometers, and their fluorescence emits light in the form of non-directional scattering, so the quantum dots composite
  • the film 230 realizes the function of uniformly diffusing visible light.
  • the infrared light is basically not absorbed or scattered by the quantum dots, so it can pass through the quantum dot composite film 230 substantially vertically.
  • the quantum dot composite film 230 adjusts the emitted infrared optical signal into parallel light substantially perpendicular to the plane of the quantum dot composite film 230, while ensuring that visible light (red, green and blue) can be uniformly scattered.
  • the quantum dot composite film 230 includes a first barrier film 2301, a quantum dot fluorescent film 2302 disposed on the first barrier film, and a second barrier film 2303 disposed on the quantum dot fluorescent film.
  • the first barrier film 2301 and the second barrier film 2303 can effectively prevent the quantum dots from being oxidized by water and oxygen in the outside air to cause fluorescence failure.
  • the first barrier film 2301 and the second barrier film 2303 completely encapsulate the quantum dot fluorescent film.
  • the first barrier film 2301, the quantum dot fluorescent film 2302, and the second barrier film 2303 include polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the quantum dot composite film 230 is provided with a light diffusion unit of a trapezoidal cylindrical light diffusion array.
  • the fingerprint identification device 103 of the quantum dot backlight module also includes an optical sensor element to transmit and receive the biological fingerprint optical signal; the biological fingerprint optical signal is infrared light.
  • the quantum dot backlight module of this embodiment does not need to be provided with a diffusion sheet and a prism sheet, and the infrared light signal used for detection can pass through the quantum dot backlight module and be accurately transmitted to biological detection objects, such as fingerprints.
  • the feedback infrared light signal of the detection object can be folded back through the quantum dot composite film 230 and the quantum dot backlight module in a nearly non-destructive manner, and is accurately and effectively collected by the optical sensor under the LCD screen, while keeping the quantum dot backlight module visible
  • the luminous brightness and uniformity of the light source realize the fingerprint recognition function of the LCD display and maintain the display effect.
  • FIG. 4 is an exploded view of a quantum dot backlight module based on a quantum dot composite film according to Embodiment 2 of the present invention.
  • the fingerprint identification device is arranged between the light guide plate 220 and the reflection 210.
  • FIG. 5 is an exploded view of a quantum dot backlight module based on a quantum dot composite film according to Embodiment 3 of the present invention. Only the differences between Embodiment 3 and Embodiment 1 will be described below, and the similarities will not be repeated here.
  • the fingerprint identification device is disposed between the light guide plate 220 and the quantum dot composite film 230.
  • FIG. 6 is an exploded view of a quantum dot backlight module based on a quantum dot composite film according to Embodiment 4 of the present invention. Only the differences between Embodiment 4 and Embodiment 1 will be described below. The similarities will not be repeated here.
  • the quantum dot backlight module is also provided with a prism sheet 240 and a diffusion sheet 250. Above the dot composite film 230, the diffusion sheet 250 is disposed between the quantum dot composite film 230 and the prism sheet 240.

Abstract

A quantum dot backlight module for in-display fingerprint recognition of an LCD, comprising a light source (221), a light guide plate (220) provided at one side of the light source (221), a reflection sheet (210) provided below the light guide plate (220), a quantum dot composite film (230) provided above the light guide plate (220), and a fingerprint recognition apparatus (103) provided below the quantum dot composite film (230) for recognizing biological fingerprint optical signals. The quantum dot composite film (230) contains first quantum dots and second quantum dots. By means of the quantum dot backlight module, the LCD module enables fingerprint recognition signals to effectively penetrate the LCD module and to be accurately collected, realizing an in-display fingerprint recognition function of an LCD display device.

Description

量子点背光模组及电子设备Quantum dot backlight module and electronic equipment 技术领域Technical field
本发明涉及通信技术领域，尤其涉及一种用于LCD屏内指纹识别的量子点背光模组以及电子设备。The present invention relates to the field of communication technology, and in particular to a quantum dot backlight module and electronic equipment for fingerprint recognition in an LCD screen.
背景技术Background technique
指纹感测和匹配是一种可靠且广泛使用的技术。指纹识别的常见方法涉及扫描样本指纹或其图像并存储指纹图像的图像和/或独特特征，可以将样本指纹的特征与已经存在于数据库中的参考指纹的信息进行比较，以确定用户的正确识别，例如用于验证目的。特别地，目前屏内(in display)指纹识别凭借其易操作性和多功能性以及适用于紧凑型便携式电子设备，而变得越来越流行。LCD屏内指纹识别显示设备明显要比OLED屏内指纹识别显示设备具有更大的使用场景范围和更好的成本优势，但是，基于LCD显示器的屏内指纹识别显示设备尚未完全成熟，特别是无法兼顾指纹识别信号在LCD模组上的有效穿透和精确收集。Fingerprint sensing and matching is a reliable and widely used technology. The common method of fingerprint identification involves scanning a sample fingerprint or its image and storing the image and/or unique characteristics of the fingerprint image. The characteristics of the sample fingerprint can be compared with the information of the reference fingerprint already existing in the database to determine the correct identification of the user , For example for verification purposes. In particular, at present, in-display fingerprint recognition has become more and more popular due to its ease of operation and versatility, as well as its suitability for compact portable electronic devices. The fingerprint recognition display device in the LCD screen obviously has a larger use scene range and better cost advantage than the fingerprint recognition display device in the OLED screen. However, the fingerprint recognition display device in the screen based on the LCD display is not fully mature, especially Take into account the effective penetration and accurate collection of fingerprint identification signals on the LCD module.
在LCD显示器的屏内指纹识别显示设备中，如图1所示，通过识别按压覆盖在LCD显示屏上的玻璃盖板104上的指纹；然而用于识别指纹的光学信号至少要穿过LCD显示屏和玻璃盖板104，且由于LCD显示屏由LCD模组102和背光模组101构成，另外玻璃盖板具备一定的厚度。因此，光学信号在透过LCD模组、背光模组和玻璃盖板的过程中会发生比较严重的折射和散射，甚至全反射。另外，当将指纹识别单元103放置在背光模组上方时，从显示屏的观察角度，下方设置指纹识别单元的显示区域之透光率相比其他不设置指纹识别单元的的显示区域之透光率要低，而底部的LED背光源提供的是均匀的平面光源，下方设置指纹识别单元的显示区域比其他区域更暗，液晶显示装置的显示区亮暗不均匀的现象。CN107644215A公开了一种光学指纹组件及移动终端，以有效提升指纹识别的清晰度，其在透明盖板与感光元件之间设置有光纤准直层，光纤准直层用于将从透明盖板朝向 感光元件的端面出射的光线转化为准直光，传导至所述感光元件。但是光纤准直层及其他光学功能层增加了LCD移动终端的厚度，对于生物指纹光学信号和显示光学信号没有区分处理，导致显示图像不均匀而且指纹识别精度较低。In the in-screen fingerprint recognition display device of the LCD display, as shown in FIG. 1, the fingerprints on the glass cover 104 covered on the LCD display are recognized by pressing; however, the optical signal used to recognize the fingerprints must pass through the LCD display at least The screen and the glass cover 104, and since the LCD display is composed of the LCD module 102 and the backlight module 101, the glass cover has a certain thickness. Therefore, when the optical signal passes through the LCD module, the backlight module, and the glass cover, severe refraction, scattering, and even total reflection occur. In addition, when the fingerprint identification unit 103 is placed above the backlight module, from the viewing angle of the display screen, the light transmittance of the display area with the fingerprint identification unit below is compared with the light transmittance of other display areas without the fingerprint identification unit. The LED backlight at the bottom provides a uniform plane light source, and the display area of the fingerprint recognition unit below is darker than other areas, and the display area of the liquid crystal display device is unevenly lit. CN107644215A discloses an optical fingerprint assembly and a mobile terminal to effectively improve the clarity of fingerprint recognition. An optical fiber collimation layer is arranged between a transparent cover plate and a photosensitive element. The optical fiber collimation layer is used to face the transparent cover plate The light emitted from the end face of the photosensitive element is converted into collimated light, which is transmitted to the photosensitive element. However, the optical fiber collimation layer and other optical function layers increase the thickness of the LCD mobile terminal, and there is no distinction between the biological fingerprint optical signal and the display optical signal, resulting in uneven display images and low fingerprint recognition accuracy.
因此，基于LCD显示器的屏内指纹识别的实现，需要对指纹识别模组的整体设计改进。Therefore, the realization of in-screen fingerprint recognition based on the LCD display requires an improvement in the overall design of the fingerprint recognition module.
发明内容Summary of the invention
本发明主要解决的技术问题是提供一种用于LCD屏内指纹识别的量子点背光模组以及LCD模组，在不设置扩散片和棱镜片的情况下，能够使得指纹识别信号在LCD模组上有效穿透并精确收集。The main technical problem to be solved by the present invention is to provide a quantum dot backlight module and LCD module for fingerprint recognition in the LCD screen, which can make the fingerprint recognition signal on the LCD module without a diffuser and prism sheet. Effective penetration and accurate collection.
为解决上述技术问题，本发明采用的一个技术方案是：量子点背光模组包括光源以及设置在光源一侧的导光板，设置在导光板下方的反射片，设置在导光板上方的量子点复合膜，设置在量子点复合膜上方的棱镜片，以及设置在量子点复合膜下方的指纹识别装置，以识别生物指纹光学信号；其中，其中量子点复合膜含有第一量子点，第二量子点。In order to solve the above technical problems, a technical solution adopted by the present invention is that the quantum dot backlight module includes a light source and a light guide plate arranged on one side of the light source, a reflective sheet arranged below the light guide plate, and a quantum dot composite set above the light guide plate Film, a prism sheet set above the quantum dot composite film, and a fingerprint recognition device set below the quantum dot composite film to identify biological fingerprint optical signals; wherein the quantum dot composite film contains the first quantum dot and the second quantum dot .
光源为蓝光LED光源，通过蓝光LED照射粒径和或材质不同的红色和绿色量子点产生红色和绿色荧光，从而形成红绿蓝(RGB)三基色，或者照射红色和黄色量子点产生红色和黄色荧光形成红黄蓝(RYB)三原色。量子点复合膜中均匀分散的第一量子点，第二量子点的粒径尺寸在1-50纳米，其荧光发射是不定向的散射形式出光，因此量子点复合膜实现了可见光均匀扩散的功能。而红外光基本不会被量子点吸收或散射，因此可以基本垂直地透过量子点复合膜。这里，量子点复合膜将出射的红外光学信号调整为基本垂直量子点复合膜平面的平行光，同时保证可见光(红绿蓝三基色)可以均匀散射。The light source is a blue LED light source. The red and green quantum dots with different particle sizes and or materials are irradiated by the blue LED to produce red and green fluorescence, thereby forming the three primary colors of red, green and blue (RGB), or irradiating red and yellow quantum dots to produce red and yellow Fluorescence forms the three primary colors of red, yellow and blue (RYB). The first quantum dots uniformly dispersed in the quantum dot composite film, the second quantum dot has a particle size of 1-50 nanometers, and its fluorescence emission is in the form of non-directional scattering, so the quantum dot composite film realizes the function of uniform diffusion of visible light . The infrared light is basically not absorbed or scattered by the quantum dots, so it can pass through the quantum dot composite film substantially vertically. Here, the quantum dot composite film adjusts the emitted infrared optical signal to parallel light substantially perpendicular to the plane of the quantum dot composite film, while ensuring that visible light (red, green and blue) can be uniformly scattered.
本发明的量子点背光模组，即便在不设置扩散片和棱镜片的情况下，也可以用于检测的红外光信号可透过量子点背光模组进而精确传播至生物检测对象，例如指纹，另一方面，检测对象的反馈红外光信号可以接近无损地折返透过量子点复合膜和量子点背光模组，并被LCD屏幕底下的光学 传感器精确有效地采集，同时保持量子点背光模组的可见光源的发光亮度和均匀度，进而实现LCD显示器的屏内指纹识别功能识别和显示效果保持。本发明的量子点背光模组减少了扩散片和棱镜片的设置，为具有屏内指纹识别功能的LCD显示器提供了更多的设计空间并实现电子设备整机的轻薄化。The quantum dot backlight module of the present invention, even if the diffusion sheet and prism sheet are not provided, the infrared light signal that can be used for detection can pass through the quantum dot backlight module and be accurately transmitted to biological detection objects, such as fingerprints. On the other hand, the feedback infrared light signal of the detection object can be folded back through the quantum dot composite film and the quantum dot backlight module in a nearly non-destructive manner, and is accurately and effectively collected by the optical sensor under the LCD screen, while maintaining the quantum dot backlight module The luminous brightness and uniformity of the visible light source can realize the fingerprint recognition function of the LCD display and maintain the display effect. The quantum dot backlight module of the present invention reduces the arrangement of the diffusion sheet and the prism sheet, provides more design space for the LCD display with the fingerprint recognition function in the screen, and realizes the lightness and thinness of the whole electronic device.
优选的，量子点复合膜包括第一阻挡薄膜，设置在第一阻挡薄膜上的量子点荧光薄膜，和设置在量子点荧光薄膜上的第二阻挡薄膜。第一阻挡薄膜和第二阻挡薄膜可以有效地防止量子点被外界空气中的水和氧气氧化而荧光失效。进一步的，第一阻挡薄膜和第二阻挡薄膜将量子点荧光膜完全包封。量子点复合膜设置有光扩散单元，用于将可见光进行扩散均匀分布。优选的，所述第一阻挡薄膜，所述量子点荧光薄膜和所述第二阻挡薄膜包括聚对苯二甲酸乙二醇酯(PET)。Preferably, the quantum dot composite film includes a first barrier film, a quantum dot fluorescent film disposed on the first barrier film, and a second barrier film disposed on the quantum dot fluorescent film. The first barrier film and the second barrier film can effectively prevent the quantum dots from being oxidized by water and oxygen in the outside air to cause fluorescence failure. Further, the first barrier film and the second barrier film completely encapsulate the quantum dot fluorescent film. The quantum dot composite film is provided with a light diffusion unit for diffusing and evenly distributing visible light. Preferably, the first barrier film, the quantum dot fluorescent film and the second barrier film comprise polyethylene terephthalate (PET).
优选的，所述第一量子点和第二量子点包括所述量子点发光层采用量子点包括二元相、三元相、四元相量子点、五元相以及各种核壳结构量子点或合金结构量子点，其中二元相量子点包括CdSe、CdS、PbSe、PbS、ZnS、InP、HgS、AgS量子点中的至少一种量子点，三元相量子点包括Zn XCd 1-XS/ZnS、CuInS、PbSe XS 1-X/PbS量子点中的至少一种量子点，四元相量子点包括CuInSeS、ZnXCd 1-XSeYS 1-Y、Zn XCd 1-XSe/ZnS、CdSe/CdS、InP/ZnS、CuInS/ZnS量子点中的至少一种量子点，五元相量子点包括InP/ZnSeS、InP/ZnSeS/ZnS、CuInS/ZnSeS量子点中的至少一种量子点。 Preferably, the first quantum dot and the second quantum dot include quantum dots. The light-emitting layer adopts quantum dots including binary phase, ternary phase, quaternary phase quantum dots, pentad phase and various core-shell structure quantum dots. Or alloy structure quantum dots, wherein the binary phase quantum dots include at least one of CdSe, CdS, PbSe, PbS, ZnS, InP, HgS, AgS quantum dots, and the ternary phase quantum dots include Zn X Cd 1-X At least one of S/ZnS, CuInS, PbSe X S 1-X /PbS quantum dots, the quaternary phase quantum dots include CuInSeS, ZnXCd 1-X SeYS 1-Y , Zn X Cd 1-X Se/ZnS At least one of CdSe/CdS, InP/ZnS, CuInS/ZnS quantum dots, the five-element phase quantum dots include at least one of InP/ZnSeS, InP/ZnSeS/ZnS, CuInS/ZnSeS quantum dots .
优选的，量子点背光模组还包括棱镜片，棱镜片设置在量子点复合膜的上方。Preferably, the quantum dot backlight module further includes a prism sheet, and the prism sheet is arranged above the quantum dot composite film.
优选的，量子点背光模组还包括扩散片，扩散片设置在所述量子点复合膜和所述棱镜片之间。Preferably, the quantum dot backlight module further includes a diffusion sheet, which is arranged between the quantum dot composite film and the prism sheet.
优选的，量子点背光模组还包括光学传感器元件，以发射和/或接收生物指纹光学信号；所述生物指纹光学信号为红外光。Preferably, the quantum dot backlight module further includes an optical sensor element to transmit and/or receive a biological fingerprint optical signal; the biological fingerprint optical signal is infrared light.
优选的，指纹识别装置设置于所述导光板和所述反射片之间；或者所述指纹识别装置设置于所述导光板和所述量子点复合膜之间；或者所述指纹识别装置设置于所述反射片的下方。Preferably, the fingerprint identification device is arranged between the light guide plate and the reflective sheet; or the fingerprint identification device is arranged between the light guide plate and the quantum dot composite film; or the fingerprint identification device is arranged between Below the reflective sheet.
优选的，指纹识别装置内嵌设置于量子点复合膜之内，以替换将所述指纹识别装置设置在所述量子点复合膜下方的设置方式。Preferably, the fingerprint identification device is embedded in the quantum dot composite film to replace the arrangement of the fingerprint identification device under the quantum dot composite film.
根据本发明之实施例，本发明之量子点背光模组与LCD面板、玻璃盖板和触屏模组整合成电子设备，其可应用于LCD显示器和用于指纹识别的电子装置。本发明之量子点背光模组应用于指纹识别的电子设备，可以实现对生物指纹信息的精确识别和验证。According to the embodiment of the present invention, the quantum dot backlight module of the present invention is integrated with the LCD panel, the glass cover plate and the touch screen module into an electronic device, which can be applied to LCD displays and electronic devices for fingerprint identification. The quantum dot backlight module of the present invention is applied to electronic equipment for fingerprint identification, and can realize accurate identification and verification of biological fingerprint information.
附图说明Description of the drawings
本发明及其优点将通过研究以非限制性实施例的方式给出，并通过所附附图所示的特定实施方式的详细描述而更好的理解，其中：The present invention and its advantages will be given in the form of non-limiting embodiments by studying, and better understood by the detailed description of the specific embodiments shown in the attached drawings, in which:
图1是现有技术的LCD显示器的屏内指纹识别显示设备。Fig. 1 is an in-screen fingerprint identification display device of a prior art LCD display.
图2是本发明实施例1的量子点背光模组的爆炸视图。FIG. 2 is an exploded view of the quantum dot backlight module of Embodiment 1 of the present invention.
图3是本发明实施例1的量子点复合膜的截面结构示图。3 is a cross-sectional structure diagram of the quantum dot composite film of Example 1 of the present invention.
图4是本发明实施例2的量子点背光模组的爆炸视图。FIG. 4 is an exploded view of the quantum dot backlight module of Embodiment 2 of the present invention.
图5是本发明实施例3的量子点背光模组的爆炸视图。FIG. 5 is an exploded view of the quantum dot backlight module of Embodiment 3 of the present invention.
图6是本发明实施例4的量子点背光模组的爆炸视图。FIG. 6 is an exploded view of the quantum dot backlight module of Embodiment 4 of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明的较佳实施例进行详细阐述，以使本发明的优点和特征能更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定。The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so that the protection scope of the present invention can be more clearly defined.
实施例1Example 1
首先，通过图2、图3，就本发明的实施例1的量子点背光模组进行说明。依照本发明实施例1之量子点背光模组，量子点背光模组包括光源221以及设置在光源221的一侧的导光板220，设置在导光板220下方的反射片210，设置在导光板220上方的量子点复合膜230，以及设置在量子点复合膜230和反射片210下方的指纹识别装置103，以识别生物指纹光学信号；其中，其中量子点复合230含有第一量子点，第二量子点。反射片210为红外透明的可见光反射材料，其一方面可以将导光板发出的可见光进行高 反射率的反射，另一方面可以接近无损的透过红外光。本实施例的量子点背光模组用于探测的出射红外光学信号准确传播至被检测对象进行探测，另一方面检测对象的反馈红外光信号可以接近无损地透过量子点复合膜和量子点背光模组，并被LCD屏幕底下的光学传感器精确有效地采集，进而实现LCD显示器的屏内指纹识别功能识别。本实施例的量子点背光模组减少了扩散片和棱镜片的设置，为具有屏内指纹识别功能的LCD显示器提供了更多的设计空间并实现电子设备整机的轻薄化。First, with reference to FIGS. 2 and 3, the quantum dot backlight module of Embodiment 1 of the present invention will be described. According to the quantum dot backlight module of Embodiment 1 of the present invention, the quantum dot backlight module includes a light source 221 and a light guide plate 220 arranged on one side of the light source 221, and a reflective sheet 210 arranged below the light guide plate 220 is arranged on the light guide plate 220 The upper quantum dot composite film 230, and the fingerprint recognition device 103 arranged under the quantum dot composite film 230 and the reflective sheet 210 to identify the optical signal of biological fingerprints; wherein the quantum dot composite 230 contains the first quantum dot and the second quantum dot point. The reflective sheet 210 is an infrared transparent visible light reflective material. On the one hand, it can reflect the visible light emitted by the light guide plate with high reflectivity, and on the other hand, it can transmit infrared light nearly losslessly. The quantum dot backlight module of this embodiment is used to detect the emitted infrared optical signal accurately propagating to the detected object for detection. On the other hand, the feedback infrared light signal of the detected object can pass through the quantum dot composite film and the quantum dot backlight nearly without damage The module is accurately and effectively collected by the optical sensor under the LCD screen to realize the fingerprint recognition function of the LCD display. The quantum dot backlight module of this embodiment reduces the arrangement of diffusion sheets and prism sheets, provides more design space for the LCD display with in-screen fingerprint recognition function, and realizes the lightness and thinness of the whole electronic device.
光源221为蓝光LED光源，光源为蓝光LED光源，通过蓝光LED照射粒径和或材质不同的红色CdSeS量子点和绿色CdZnSeS量子点产生红色和绿色荧光，从而形成红绿蓝(RGB)三基色，或者照射红色和黄色量子点产生红色和黄色荧光形成红黄蓝(RYB)三原色。量子点复合膜230中的第一量子点即红色荧光量子点，第二量子点即绿色荧光量子点的粒径尺寸在1-20纳米，其荧光是不定向的散射形式出光，因此量子点复合膜230实现了可见光均匀扩散的功能。而红外光基本不会被量子点吸收或散射，因此可以基本垂直透过量子点复合膜230。这里，量子点复合膜230将出射的红外光学信号调整为基本垂直量子点复合膜230平面的平行光，同时保证可见光(红绿蓝三基色)可以均匀散射。The light source 221 is a blue LED light source, and the light source is a blue LED light source. The red CdSeS quantum dots and green CdZnSeS quantum dots with different particle sizes and or materials are irradiated by the blue LED to generate red and green fluorescence, thereby forming the three primary colors of red, green and blue (RGB), Or irradiate red and yellow quantum dots to produce red and yellow fluorescence to form the three primary colors of red, yellow and blue (RYB). The first quantum dots in the quantum dot composite film 230 are red fluorescent quantum dots, and the second quantum dots, green fluorescent quantum dots, have a particle size of 1-20 nanometers, and their fluorescence emits light in the form of non-directional scattering, so the quantum dots composite The film 230 realizes the function of uniformly diffusing visible light. The infrared light is basically not absorbed or scattered by the quantum dots, so it can pass through the quantum dot composite film 230 substantially vertically. Here, the quantum dot composite film 230 adjusts the emitted infrared optical signal into parallel light substantially perpendicular to the plane of the quantum dot composite film 230, while ensuring that visible light (red, green and blue) can be uniformly scattered.
量子点复合膜230包括第一阻挡薄膜2301，设置在第一阻挡薄膜上的量子点荧光薄膜2302，和设置在量子点荧光薄膜上的第二阻挡薄膜2303。第一阻挡薄膜2301和第二阻挡薄膜2303可以有效地防止量子点被外界空气中的水和氧气氧化而荧光失效。第一阻挡薄膜2301和第二阻挡薄膜2303将量子点荧光膜完全包封。第一阻挡薄膜2301，量子点荧光薄膜2302和第二阻挡薄膜2303包括聚对苯二甲酸乙二醇酯(PET)。量子点复合膜230设置有梯形圆柱体光扩散阵列的光扩散单元。The quantum dot composite film 230 includes a first barrier film 2301, a quantum dot fluorescent film 2302 disposed on the first barrier film, and a second barrier film 2303 disposed on the quantum dot fluorescent film. The first barrier film 2301 and the second barrier film 2303 can effectively prevent the quantum dots from being oxidized by water and oxygen in the outside air to cause fluorescence failure. The first barrier film 2301 and the second barrier film 2303 completely encapsulate the quantum dot fluorescent film. The first barrier film 2301, the quantum dot fluorescent film 2302, and the second barrier film 2303 include polyethylene terephthalate (PET). The quantum dot composite film 230 is provided with a light diffusion unit of a trapezoidal cylindrical light diffusion array.
量子点背光模组的指纹识别装置103还包括光学传感器元件，以发射和接收生物指纹光学信号；生物指纹光学信号为红外光。The fingerprint identification device 103 of the quantum dot backlight module also includes an optical sensor element to transmit and receive the biological fingerprint optical signal; the biological fingerprint optical signal is infrared light.
本实施例的量子点背光模组在不需要设置扩散片和棱镜片的情况下，用于检测的红外光信号可透过量子点背光模组进而精确传播至生物检测对象，例如指纹，另一方面，检测对象的反馈红外光信号可以接近无损地折 返透过量子点复合膜230和量子点背光模组，并被LCD屏幕底下的光学传感器精确有效地采集，同时保持量子点背光模组的可见光源的发光亮度和均匀度，进而实现LCD显示器的屏内指纹识别功能识别和显示效果保持。The quantum dot backlight module of this embodiment does not need to be provided with a diffusion sheet and a prism sheet, and the infrared light signal used for detection can pass through the quantum dot backlight module and be accurately transmitted to biological detection objects, such as fingerprints. On the other hand, the feedback infrared light signal of the detection object can be folded back through the quantum dot composite film 230 and the quantum dot backlight module in a nearly non-destructive manner, and is accurately and effectively collected by the optical sensor under the LCD screen, while keeping the quantum dot backlight module visible The luminous brightness and uniformity of the light source, in turn, realize the fingerprint recognition function of the LCD display and maintain the display effect.
实施例2Example 2
请参照图4，是本发明的实施例2的基于量子点复合膜的量子点背光模组的爆炸视图。以下仅就实施例2与实施例1的相异之处进行说明，关于相似之处在此不再赘述，指纹识别装置设置于所述导光板220和所述反射210片之间。Please refer to FIG. 4, which is an exploded view of a quantum dot backlight module based on a quantum dot composite film according to Embodiment 2 of the present invention. Hereinafter, only the differences between Embodiment 2 and Embodiment 1 will be described, and the similarities will not be repeated here. The fingerprint identification device is arranged between the light guide plate 220 and the reflection 210.
实施例3Example 3
请参照图5，是本发明的实施例3的基于量子点复合膜的量子点背光模组的爆炸视图。以下仅就实施例3与实施例1的相异之处进行说明，关于相似之处在此不再赘述，指纹识别装置设置于导光板220和所述量子点复合膜230之间。Please refer to FIG. 5, which is an exploded view of a quantum dot backlight module based on a quantum dot composite film according to Embodiment 3 of the present invention. Only the differences between Embodiment 3 and Embodiment 1 will be described below, and the similarities will not be repeated here. The fingerprint identification device is disposed between the light guide plate 220 and the quantum dot composite film 230.
实施例4Example 4
请参照图6，是本发明的实施例4的基于量子点复合膜的量子点背光模组的爆炸视图。以下仅就实施例4与实施例1的相异之处进行说明，关于相似之处在此不再赘述，量子点背光模组还设置有棱镜片240和扩散片250，棱镜片240设置在量子点复合膜230的上方，扩散片250设置于量子点复合膜230和棱镜片240之间。Please refer to FIG. 6, which is an exploded view of a quantum dot backlight module based on a quantum dot composite film according to Embodiment 4 of the present invention. Only the differences between Embodiment 4 and Embodiment 1 will be described below. The similarities will not be repeated here. The quantum dot backlight module is also provided with a prism sheet 240 and a diffusion sheet 250. Above the dot composite film 230, the diffusion sheet 250 is disposed between the quantum dot composite film 230 and the prism sheet 240.
虽然在上文中已经参考一些实施例对本发明进行了描述，然而在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，本发明所披露的各个实施例中的各项特征均可通过任意方式相互结合起来使用，在本说明书中未对这些组合的情况进行穷举性的描述是出于省略篇幅和节约资源的考虑。因此， 本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。Although the present invention has been described above with reference to some embodiments, without departing from the scope of the present invention, various modifications can be made to it and the components therein can be replaced with equivalents. In particular, as long as there is no structural conflict, the various features in the various embodiments disclosed in the present invention can be combined with each other in any manner. The absence of an exhaustive description of these combinations in this specification means that Because of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims (10)

  1. 一种量子点背光模组，其包括：A quantum dot backlight module includes:
    光源以及设置在所述光源一侧的导光板，设置在所述导光板下方的反射片，其特征在于，设置在所述导光板上方的量子点复合膜，以及设置在所述量子点复合膜下方的指纹识别装置，以识别生物指纹光学信号；A light source and a light guide plate arranged on one side of the light source, a reflective sheet arranged under the light guide plate, characterized in that a quantum dot composite film arranged above the light guide plate, and a quantum dot composite film arranged on the quantum dot composite film Fingerprint identification device below to identify optical signals of biological fingerprints;
    其中，所述量子点复合膜含有第一量子点，第二量子点。Wherein, the quantum dot composite film contains a first quantum dot and a second quantum dot.
  2. 根据权利要求1所述的量子点背光模组，其特征在于：所述量子点复合膜包括第一阻挡薄膜，设置在所述第一阻挡薄膜上的量子点荧光薄膜，和设置在所述量子点荧光薄膜上的第二阻挡薄膜；所述量子点复合膜设置有光扩散单元。The quantum dot backlight module according to claim 1, wherein the quantum dot composite film comprises a first barrier film, a quantum dot fluorescent film disposed on the first barrier film, and a quantum dot fluorescent film disposed on the quantum dot The second barrier film on the dot fluorescent film; the quantum dot composite film is provided with a light diffusion unit.
  3. 根据权利要求2所述的量子点背光模组，其特征在于：所述第一阻挡薄膜，所述量子点荧光薄膜和所述第二阻挡薄膜均包括聚对苯二甲酸乙二醇酯。2. The quantum dot backlight module of claim 2, wherein the first barrier film, the quantum dot fluorescent film and the second barrier film all comprise polyethylene terephthalate.
  4. 根据权利要求1所述的量子点背光模组，其特征在于：所述第一量子点和第二量子点包括二元相量子点，三元相量子点，四元相量子点，五元相量子点，核壳结构量子点，以及合金结构量子点中的至少一种量子点，其中二元相量子点包括CdSe、CdS、PbSe、PbS、ZnS、InP、HgS、AgS量子点中的至少一种量子点，三元相量子点包括Zn XCd 1-XS/ZnS、CuInS、PbSe XS 1-X/PbS量子点中的至少一种量子点，四元相量子点包括CuInSeS、ZnXCd 1-XSeYS 1-Y、Zn XCd 1-XSe/ZnS、CdSe/CdS、InP/ZnS、CuInS/ZnS量子点中的至少一种量子点，五元相量子点包括InP/ZnSeS、InP/ZnSeS/ZnS、CuInS/ZnSeS量子点中的至少一种量子点。 The quantum dot backlight module according to claim 1, wherein the first quantum dot and the second quantum dot comprise binary phase quantum dots, ternary phase quantum dots, quaternary phase quantum dots, and quinary phase quantum dots. At least one of quantum dots, core-shell structure quantum dots, and alloy structure quantum dots, wherein the binary phase quantum dots include at least one of CdSe, CdS, PbSe, PbS, ZnS, InP, HgS, and AgS quantum dots Quantum dots, ternary phase quantum dots include at least one of Zn X Cd 1-X S/ZnS, CuInS, PbSe X S 1-X /PbS quantum dots, and quaternary phase quantum dots include CuInSeS, ZnXCd 1 -X SeYS 1-Y , Zn X Cd 1-X Se/ZnS, CdSe/CdS, InP/ZnS, CuInS/ZnS quantum dots at least one quantum dot, the five-element phase quantum dots include InP/ZnSeS, InP/ At least one of ZnSeS/ZnS and CuInS/ZnSeS quantum dots.
  5. 根据权利要求1所述的量子点背光模组，其特征在于：所述量子点背光模组还包括棱镜片，所述棱镜片设置在量子点复合膜的上方。The quantum dot backlight module of claim 1, wherein the quantum dot backlight module further comprises a prism sheet, and the prism sheet is disposed above the quantum dot composite film.
  6. 根据权利要求5所述的量子点背光模组，其特征在于：所述量子点背光模组还包括扩散片，所述扩散片设置在所述量子点复合膜和所述棱镜片之间。4. The quantum dot backlight module of claim 5, wherein the quantum dot backlight module further comprises a diffusion sheet, the diffusion sheet being disposed between the quantum dot composite film and the prism sheet.
  7. 根据权利要求1所述的量子点背光模组，其特征在于：所述量子点背光模组还包括光学传感器元件，以发射和/或接收生物指纹光学信号；所述生物指纹光学信号为红外光。The quantum dot backlight module according to claim 1, wherein the quantum dot backlight module further comprises an optical sensor element to emit and/or receive a biological fingerprint optical signal; the biological fingerprint optical signal is infrared light .
  8. 根据权利要求1所述的量子点背光模组，其特征在于：所述指纹识别装置设置于所述导光板和所述反射片之间；或者所述指纹识别装置设置于所述导光板和所述量子点复合膜之间；或者所述指纹识别装置设置于所述反射片的下方。The quantum dot backlight module of claim 1, wherein the fingerprint identification device is provided between the light guide plate and the reflective sheet; or the fingerprint identification device is provided between the light guide plate and the light guide plate. Between the quantum dot composite films; or the fingerprint identification device is arranged under the reflective sheet.
  9. 根据权利要求1所述的量子点背光模组，其特征在于：将所述指纹识别装置内嵌设置在所述量子点复合膜的内部，以替换将所述指纹识别装置设置在所述量子点复合膜下方的设置方式。The quantum dot backlight module of claim 1, wherein the fingerprint identification device is embedded in the quantum dot composite film, instead of placing the fingerprint identification device on the quantum dot The setting method under the composite membrane.
  10. 一种用于指纹识别的电子设备，包括：权利要求1-9中任一所述的量子点背光模组、LCD面板、玻璃盖板和触屏模组。An electronic device for fingerprint identification, comprising: the quantum dot backlight module, LCD panel, glass cover plate and touch screen module according to any one of claims 1-9.
PCT/CN2019/126120 2019-06-28 2019-12-18 Quantum dot backlight module and electronic device WO2020258767A1 (en)

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