CN213519965U - Display device, detection module, image module and electronic equipment - Google Patents

Abstract

The utility model discloses a display device, at least one in the three pixel cell of red, green and blue, the pixel cell includes luminescence unit and the blooming that is located luminescence unit one side, luminescence unit is used for launching single colour visible light, defines display device's light-emitting one side is the light-emitting side, and the luminescence unit to the sub-pixel of same colour is in the visible light of launching single colour, the blooming is used for the reflection the visible light of single colour that the luminescence unit launched is to the light-emitting side and the transmission is different with the colour that launches and visible light and/or near infrared light. The utility model also discloses a detection module and image module that is used for including this display device's electronic equipment, is used for this electronic equipment. The utility model discloses can realize under the screen biological characteristic detection and outside object formation of image, have better user experience.

Description

Display device, detection module, image module and electronic equipment

Technical Field

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

Background

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

Recently, in order to realize a full screen or a nearly full screen effect, a biological feature detection technology under a screen is developed, that is, a detection module or an imaging module is placed below a display screen, and a detection light beam is sent or received through the display screen to realize biological feature detection. For self-luminous display screens, such as Organic Light Emitting Diode (OLED) display screens, some manufacturers have proposed placing a detection module or an imaging module under the OLED display screen and using the emitted light beam of the OLED itself as the detection light beam for biometric detection. However, because the bottom of the OLED display screen opposite to the light-emitting surface is generally an opaque pixel electrode or a reflective electrode, although the scheme can achieve biological feature detection under the screen, the detection light beam can only reach under the screen through the gap of the OLED pixel unit, and the detection light beam has low transmittance, resulting in low detection efficiency. In addition, due to self-luminous interference and extremely low transmittance of visible light, the conventional OLED cannot be used for shooting and imaging under a screen. Therefore, the existing under-screen biometric detection and imaging effects cannot meet the user's needs.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a detect module, image module for solving prior art problem, including this display device who detects module or image module to and including this display device's electronic equipment.

An aspect of the utility model provides a display device, at least one among the three pixel cell of red, green and blue, the pixel cell includes luminescence unit and the blooming that is located luminescence unit one side, luminescence unit is used for launching single colour visible light, defines display device's light-emitting one side is the light-emitting side, and the luminescence unit to the sub-pixel of same colour is in the visible light of launching single colour, the blooming is used for the reflection the visible light of single colour that the luminescence unit launched is to the light-emitting side and the transmission is different with the colour that launches visible light and/or near infrared light.

Optionally, the display device can emit light and display images on one side, the display device includes an optical film, the optical film has an average reflectance of more than 30% and an average transmittance of less than 70% for visible light with a wavelength of 380nm to 700nm, and the optical film has an average transmittance of more than 80% for near-infrared light with a wavelength of 830nm to 1000 nm.

Optionally, the near-infrared light is a light beam with a wavelength of 830nm to 1000 nm.

Optionally, the near-infrared light is a light beam with a wavelength of 900nm to 1000 nm.

Optionally, the average reflectivity of the pixel unit to the visible light emitted by the pixel unit or the visible light with the same wavelength or the same color as the visible light emitted by the pixel unit is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%, and the average transmittance of the pixel unit to the visible light with the different wavelength or different color from the wavelength or the different color from the visible light emitted by the pixel unit is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%.

Optionally, the pixel unit has a reflectivity for the emitted visible light and the visible light with the same wavelength or the same color as the emitted visible light, which is greater than the reflectivity for the visible light with the different wavelength or the different color from the emitted visible light.

Optionally, the transmittance of the pixel unit for the visible light emitted by the pixel unit and the visible light with the same wavelength or the same color as the visible light emitted by the pixel unit is smaller than the transmittance for the visible light with the different wavelength or the different color from the visible light emitted by the pixel unit.

Optionally, the pixel unit has a reflectivity greater than a transmittance for the visible light emitted by the pixel unit and the visible light having the same wavelength or color as the visible light emitted by the pixel unit.

Optionally, the pixel unit has a reflectivity less than a transmittance for visible light with a wavelength or a color different from that of the visible light emitted by the pixel unit.

Optionally, the pixel cell is capable of emitting one or more of red, green or blue light at the top, the bottom of the pixel cell has a center reflectivity for red light that is greater than twice the center reflectivity for green or blue light, or the pixel cell has a center reflectivity for green light that is greater than twice the center reflectivity for blue or red light, or the pixel cell has a center reflectivity for blue light that is greater than twice the center reflectivity for green or red light.

Optionally, the pixel cell can emit at the top and reflect one or more of red, green, or blue light at the bottom, wherein the blue and green light transmittance of the pixel cell emitting red light is greater than 80% and the reflectance is less than 20%; the pixel unit emitting green light has transmittance of more than 80% and reflectance of less than 20% for blue light and red light; the pixel unit emitting blue light has transmittance of more than 80% and reflectance of less than 20% for red light and green light.

Optionally, the pixel unit includes a pixel electrode and a light emitting unit disposed on the pixel electrode, the light emitting unit can be configured to emit visible light, and the pixel electrode can be configured to reflect visible light emitted by the light emitting unit and visible light having the same wavelength or color as the visible light emitted by the light emitting unit, and transmit visible light having a different wavelength or color from the visible light emitted by the light emitting unit.

Optionally, the pixel unit includes an optical membrane, a pixel electrode, and a light emitting unit, which are sequentially arranged from bottom to top, the light emitting unit can be used to emit visible light, the optical membrane can be used to reflect visible light emitted by the light emitting unit and visible light having the same wavelength or color as the visible light emitted by the light emitting unit, and transmit visible light having a different wavelength or color from the visible light emitted by the light emitting unit, and the pixel electrode can transmit the visible light emitted by the light emitting unit.

Optionally, the optical film has an average reflectivity of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for a light beam of a specific wavelength or a specific color, and an average transmittance of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for a light beam of another wavelength or another color.

Optionally, a common electrode is further disposed on the light emitting unit, and the common electrode and the pixel electrode provide a current required for light emission for the light emitting unit.

Optionally, the display device further includes a substrate disposed below the optical film, and a detection module at least partially located below the substrate is capable of receiving and/or emitting a detection light beam through the display device, where the detection light beam is capable of being used to detect biometric information of an external object, or draw an image of the external object, or be used for imaging the external object.

Optionally, the display device includes one of an AMOLED display, a Micro-LED display, and a Mini-LED display.

An aspect of the present invention further provides an electronic device, including display device and setting detection module or image module below the display device, the detection module can be penetrated through the display device transmits and/or receives detection light beam or imaging light beam and is used for external object biological characteristic detection, or image drawing, or external object imaging, the display device is as above the display device.

Optionally, the image module includes one or more visible light image sensors capable of simultaneously or time-divisionally receiving, through the pixel unit, an imaging light beam emitted or reflected by an external object, the visible light image sensor is disposed below or on the back of the display device, the imaging light beam includes visible light, and the imaging light beam received by the receiving unit simultaneously or time-divisionally can be used for single imaging of the external object.

Optionally, the detection module includes one or more receiving units capable of receiving, through the pixel unit, detection light beams emitted or reflected by an external object at the same time or in a time-sharing manner, the receiving unit is disposed below or on the back of the display device, the detection light beams include visible light and/or infrared light, and the detection light beams received by the one or more receiving units at the same time or in the time-sharing manner can be used for single detection of a biometric feature of the external object or single imaging of the external object.

Optionally, the detection module further includes an emission unit disposed below the display device or in a non-display area, the emission unit is capable of emitting a detection light beam reaching the surface or the outside of the display device through the display device, and the detection light beam reaches the receiving unit through the display device after being reflected by an external object.

Optionally, the emission unit includes a light emitting array and/or a diffractive optical element, the light emitting array includes a plurality of light emitting chips arranged in a two-dimensional pattern, the diffractive optical element is disposed on the light emitting array, and the diffractive optical element can split the light beam emitted by the light emitting array, copy the light beam and project the light beam to a space.

Optionally, the detection light beam includes visible light and/or infrared light or near-infrared light, and the detection module is capable of detecting and identifying a two-dimensional or three-dimensional biological feature of the external object according to the detection light beam, or drawing a two-dimensional or three-dimensional image or imaging of the external object; the imaging light beam comprises visible light, and the image module can photograph or video an external object according to the imaging light beam.

Optionally, the detection module can be used for the biological feature detection and the discernment of external object, external object's biological feature includes fingerprint, facial feature, iris, vascular structure, heartbeat, body temperature, gesture, one or more in the expression.

An aspect of the utility model provides a still provides a detection module, it is the detection module that foretell electronic equipment includes to detect the module.

An aspect of the utility model provides an image module still provides, image module is the image module that foretell electronic equipment includes.

An aspect of the present invention further provides an electronic device, including the above-mentioned display device, or the above-mentioned detection module, or the above-mentioned image module.

Compared with the prior art, the utility model discloses display device, electronic equipment and detection module, image module can see through display device's pixel unit receives and/or launches measuring beam and sees through pixel unit receives and/or launches the formation of image light beam. The detection beam and the imaging beam do not pass through the gaps of the pixel units. Because the most area of pixel element occupied the display device display area, the detection light beam that consequently is used for outside object biological characteristic to detect and discern and the imaging light beam's that is used for the formation of image transmissivity is great, makes the utility model discloses a biological characteristic detection efficiency is higher, visible light imaging effect is better, and user experience is better. Additionally, the utility model discloses can use visible light and/or invisible light as detecting beam simultaneously, further improvement biological characteristic detects safety and efficiency.

Drawings

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

fig. 2 is a schematic view of an embodiment of the present invention;

FIG. 3 is a schematic block diagram, partially in cross-section, of the embodiment shown in FIG. 1;

FIG. 4A is a schematic diagram of a partial cross-sectional structure of the embodiment shown in FIG. 1;

fig. 4B to 4C are schematic views of partial cross-sectional structures according to an embodiment of the present invention

FIG. 5 is a schematic diagram of a portion of the optical film shown in FIG. 4;

FIG. 6 is a block schematic diagram of a portion of the circuitry of the embodiment shown in FIG. 1;

FIG. 7 is a partial schematic view of the embodiment shown in FIG. 1;

FIG. 8 is a partial schematic view of the embodiment shown in FIG. 1;

fig. 9 is a graph illustrating transmittance curves of optical films according to an embodiment of the present invention;

fig. 10 is a graph illustrating the reflectivity curve of an optical film according to an embodiment of the present invention;

fig. 11 is a schematic view of an embodiment of the present invention;

FIG. 12 is a schematic partial cross-sectional view of the embodiment of FIG. 11;

fig. 13 is a schematic view of an embodiment of the present invention;

FIG. 14 is a schematic partial cross-sectional view of the embodiment of FIG. 13;

fig. 15 is a schematic view of an embodiment of the present invention;

fig. 16 is a schematic view of an embodiment of the present invention;

FIG. 17 is a schematic partial cross-sectional view of the embodiment of FIG. 16;

fig. 18 is a schematic view of an embodiment of the present invention;

fig. 19 is a schematic view of an embodiment of the present invention;

fig. 20 is a schematic view of an embodiment of the present invention;

fig. 21 is a schematic view of an embodiment of the present invention;

fig. 22 is a schematic view of an embodiment of the present invention;

FIG. 23 is a schematic diagram of a portion of the structure of the embodiment shown in FIG. 22;

fig. 24A to 24C are schematic diagrams of transmittance curves according to an embodiment of the present invention;

fig. 25 is a schematic view of an embodiment of the present invention;

fig. 26 is a schematic view of an embodiment of the present invention;

fig. 27 is a schematic view of an embodiment of the present invention;

fig. 28 is a schematic view of an embodiment of the present invention;

fig. 29 is a schematic flow chart diagram of an embodiment of the present invention.

Detailed Description

In the detailed description of the embodiments of the invention, it will be understood that when a substrate, 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.

One aspect of the present invention discloses a display device, including a plurality of pixel units, the pixel unit can emit visible light at the top or bottom, reflect at the bottom or top its emitted partial visible light and visible light the same with the wavelength of its emitted visible light or the same color, transmit with it the different or different visible light of color of the visible light wavelength of emission, and transmit infrared light or near infrared light.

The pixel unit has a reflectivity of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for the visible light emitted by the pixel unit or the visible light with the same wavelength or color as the visible light emitted by the pixel unit, and the pixel unit has a transmittance of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for the visible light with the different wavelength or color from the visible light emitted by the pixel unit.

Alternatively, the pixel unit has a reflectivity for the emitted visible light and the visible light with the same wavelength or color as the emitted visible light, which is greater than the reflectivity for the visible light with the different wavelength or color from the emitted visible light.

Alternatively, the transmittance of the pixel unit for the visible light emitted by the pixel unit and the visible light with the same wavelength or color as the visible light emitted by the pixel unit is smaller than the transmittance for the visible light with the different wavelength or color from the visible light emitted by the pixel unit.

Alternatively, the pixel unit has a reflectivity greater than a transmittance for the visible light emitted by the pixel unit and the visible light having the same wavelength or color as the visible light emitted by the pixel unit.

Alternatively, the pixel unit has a reflectivity smaller than a transmittance for visible light having a wavelength different from or a color different from that of the visible light emitted by the pixel unit.

Alternatively, the pixel cell can emit one or more of red, green, or blue light at the top or bottom, the bottom or top of the pixel cell has a center reflectivity for red light that is greater than twice the center reflectivity for green or blue light, or the pixel cell has a center reflectivity for green light that is greater than twice the center reflectivity for blue or red light, or the pixel cell has a center reflectivity for blue light that is greater than twice the center reflectivity for green or red light.

Alternatively, the pixel cell can emit at the top or bottom and reflect one or more of red, green, or blue light at the bottom or top, wherein the red light emitting pixel cell has a transmittance of greater than 80% and a reflectance of less than 20% for blue and green light; the pixel unit emitting green light has transmittance of more than 80% and reflectance of less than 20% for blue light and red light; the pixel unit emitting blue light has transmittance of more than 80% and reflectance of less than 20% for red light and green light.

Alternatively, the pixel unit includes a pixel electrode, a light emitting unit disposed on the pixel electrode, the light emitting unit being capable of emitting visible light, and the pixel electrode being capable of reflecting the visible light emitted by the light emitting unit and the visible light having the same wavelength or color as the visible light emitted by the light emitting unit and transmitting the visible light having a different wavelength or color from the visible light emitted by the light emitting unit.

The pixel unit comprises an optical diaphragm, a pixel electrode and a light-emitting unit which are sequentially arranged from bottom to top, the light-emitting unit can be used for emitting visible light, the optical diaphragm can be used for reflecting the visible light emitted by the light-emitting unit and the visible light with the same wavelength or color as the visible light emitted by the light-emitting unit and transmitting the visible light with the different wavelength or color from the visible light emitted by the light-emitting unit, and the pixel electrode can transmit the visible light emitted by the light-emitting unit.

Alternatively, the optical film has a reflectance of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for a light beam of a specific wavelength or a specific color, and a transmittance of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for light beams of other wavelengths.

Alternatively, the pixel electrode comprises a three-layer composite structure of ITO/Ag/ITO, wherein the thickness of the ITO layers on two sides of the Ag layer is respectively

The middle Ag layer has a thickness of

The common electrode includes a thickness of

The light emitting unit includes an organic light emitting material.

Alternatively, a common electrode is further disposed on the light emitting unit, and the common electrode and the pixel electrode commonly supply a current required for light emission to the light emitting unit.

Alternatively, the display device further comprises a substrate disposed below the optical film, and a detection module at least partially located below the substrate is capable of receiving and/or emitting a detection beam through the display device, wherein the detection beam can be used for detecting the biological characteristic information of the external object, or drawing an image of the external object, or imaging the external object.

Variably, the display device comprises one of an AMOLED display, a Micro-LED display, a Mini-LED display.

One aspect of the present invention discloses an electronic device, which includes the above-mentioned display device.

Alternatively, the device further comprises a detection module or an image module arranged below the display device, wherein the detection module can transmit and/or receive a detection light beam or an imaging light beam through the display device and is used for external object biological feature detection, image drawing or external object imaging.

Alternatively, the image module comprises one or more visible light image sensors capable of simultaneously or time-divisionally receiving imaging light beams emitted or reflected by an external object through the pixel units, the visible light image sensors are arranged below or on the back of the display device, the imaging light beams comprise visible light, and the imaging light beams received simultaneously or time-divisionally by the receiving units can be used for single-time imaging of the external object.

Alternatively, the detection module comprises one or more receiving units capable of receiving, through the pixel unit, detection light beams emitted or reflected by an external object at the same time or in a time-sharing manner, the receiving unit is disposed below or at the back of the display device, the detection light beams comprise visible light and/or infrared light, and the detection light beams received at the same time or in the time-sharing manner by the one or more receiving units can be used for detecting the biological characteristics of the external object at a single time or imaging the external object at a single time.

Alternatively, the detection module further comprises an emission unit disposed below the display device or in a non-display area, the emission unit can emit a detection beam to the surface or outside of the display device through the display device, and the detection beam can be reflected by an external object and then reaches the receiving unit through the display device.

Alternatively, the emission unit includes a light emitting array including a plurality of light emitting chips arranged in a two-dimensional pattern and/or a diffractive optical element provided on the light emitting array, the diffractive optical element being capable of splitting and replicating a light beam emitted from the light emitting array and projecting the light beam to a space.

Variably, the detection light beam comprises visible light and/or infrared light or near infrared light, and the detection module can detect and identify two-dimensional or three-dimensional biological features of the external object or draw a two-dimensional or three-dimensional image or image of the external object according to the detection light beam; the imaging light beam comprises visible light, and the image module can photograph or video an external object according to the imaging light beam.

Alternatively, the detection module can be used for biometric detection and identification of an external object, the biometric of the external object comprising: fingerprint, facial features, iris, vascular structure, heartbeat, body temperature, gesture, expression.

An aspect of the utility model provides a still provides a detection module, it is the detection module that above-mentioned electronic equipment includes to detect the module.

An aspect of the utility model provides an image module still provides, image module is the image module that above-mentioned electronic equipment included.

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

Referring to fig. 1, in an embodiment of the present invention, an electronic device 100 includes a display device 1 and a detection module 2 disposed at least partially under the display device 1. The display device 1 comprises a substrate 30, a reflecting layer 10, a display function layer 20 and a protective cover plate 14 which are sequentially arranged from bottom to top. The display device 1 is capable of emitting a display beam of visible light and displaying an image. The detection module 2 can receive and/or emit near infrared light through the display device 1. The visible light refers to light beams with wavelengths between 380nm and 700nm, and the near infrared light refers to light beams with wavelengths between 800nm and 1000 nm.

In this embodiment, the substrate 30 may be one of a glass substrate, a metal substrate, a semiconductor substrate, a plastic substrate, or a polymer substrate. The reflective layer 10 includes one or more multilayer dielectric films having a high average reflectivity for a light beam of a specific wavelength or a range of wavelengths. In this embodiment, the reflective layer 10 has an average reflectance of more than 80% and an average transmittance of less than 20% for visible light between 380nm (nanometers) and 700 nm. Meanwhile, the reflective layer 10 has an average transmittance of more than 80% and an average reflectance of less than 20% for near infrared light between 830nm and 1000 nm. The protective cover 14 may be a protective layer made of glass or other transparent material. The display functional layer 20 is capable of emitting visible light and transmitting visible and/or near infrared light.

The display function layer 20 may include an Organic Light Emitting Diode (OLED) for emitting visible light, a pixel electrode and a common electrode for supplying a driving current to the OLED, the pixel electrode and the common electrode being disposed at upper and lower sides of the led, and the common electrode and the pixel electrode being capable of transmitting visible light and near infrared light. The display function layer 20 may be a transparent OLED display panel. The display device 1 may be an AMOLED display.

In other or alternative embodiments, the substrate 30 may be omitted.

In other or alternative embodiments, the reflective layers 10 may be multiplexed into the substrate at the same time. In this case, the bottom of the reflective layer 10 may include an optical film having a refractive index smaller than that of the reflective layer 10.

In other or alternative embodiments, the display device 1 may also be a Micro-LED display or a Mini-LED display, and the luminescent layer 12 may comprise an inorganic luminescent material. Referring to fig. 2 and fig. 3, which are schematic views of a modified embodiment of the present invention, an electronic device 100 includes a display device 1 and a detection module 2 disposed at least partially below or on a back surface of the display device 1. The detection module 2 can transmit and/or receive a detection light beam through the display device 1. The display device 1 is capable of emitting a display beam and displaying an image on one side. The lower side or the back side of the display device 1 is a side away from the display device 1 where the display light beam exits or a side opposite to the light exit surface of the display device 1 where the display light beam exits.

The display device 1 includes a substrate 30, a reflective layer 10 provided on the substrate 30, a first electrode layer 11 provided on the reflective layer 10, a light-emitting layer 12 provided on the first electrode layer 11, and a second electrode layer 13 provided on the light-emitting layer 12. The detection module 2 is at least partially disposed under the substrate 30, and spaced from or closely attached to the substrate 30.

Further, the lower surface of the substrate 30 is provided with an optical absorption film (not shown) for absorbing visible light and/or infrared light. The optical absorption film may be formed on the lower surface of the substrate 30 by coating, or adhering, or spraying, or other means. The detection module 2 is at least partially arranged below the optical absorption film. The optical absorption film is correspondingly arranged below the optical absorption film, and the detection module 2 is provided with an opening. The detection module 2 can receive and/or emit a detection beam through the opening.

The substrate 30 serves to support and protect other components disposed thereon. The display device 1 is capable of emitting a display beam and displaying an image. The display device 1 includes a plurality of pixel units. The pixel cells can be used to emit display light beams of a particular wavelength or a particular color, respectively, for example, but not limited to, the pixel cells can emit one or more of red, green, or blue light. In this embodiment, the display beam is visible light. In other or modified embodiments, the light-emitting layer 12 may be replaced with a light-emitting layer including an inorganic light-emitting material,

as shown in fig. 1 and fig. 2, in this embodiment, the first electrode layer 11 includes a plurality of pixel electrodes 111. The light emitting layer 12 includes a plurality of light emitting cells 121 corresponding to the pixel electrodes 111. The second electrode layer 13 includes a common electrode 131. The common electrode 131 is connected to a low level and may be also referred to as a cathode in general. The pixel electrode 111 is connected to a high level and may be also referred to as an anode. The plurality of pixel electrodes 111 are regularly arranged, such as but not limited to: the plurality of pixel electrodes 111 are arranged in a matrix array. It is understood that, in the modified embodiment of the present invention, the pixel electrode 111 may also be a cathode, and the common electrode 131 may also be an anode.

In this embodiment, the substrate 30 includes a base and a Thin Film Transistor Matrix (TFT Matrix) (not shown) disposed on the base. The substrate may be made of a transparent, non-conductive material, such as glass. The tft matrix includes a plurality of tfts and conductive paths thereof, and can be used to control whether to supply current to the pixel electrode 111, and further control whether the corresponding light emitting unit 121 emits light.

In a modified embodiment of the present invention, the display device 1 may further include a protective cover 14 disposed above the second electrode layer 13.

In the above and modified embodiments of the present invention, the substrate 30 and the protective cover 14 disposed above the second electrode layer 13 may be a glass substrate, or a plastic substrate, or a substrate made of other transparent materials. For example, the substrate 30 may be a pet (polyethylene terephthalate) substrate. In other embodiments of the present invention, the substrate 30 may also be made of metal or other materials.

In a modified embodiment of the present invention, the first electrode layer 11 and the second electrode layer 13 may include metal layers, and may be made of materials including, but not limited to, Al, Ag, Au, Cu, Mg, Ba, and their alloys. In a modified embodiment of the present invention, the first electrode layer 11 and the second electrode layer 13 may also include a metal oxide, such as, but not limited to, ito (indium tin oxide), izo (indium Zinc oxide), FTO (fluorine-doped SnO2 transparent conductive glass), and the like.

In a modified embodiment of the present invention, the first electrode layer 11 may include Metal Nano Wire (Metal Nano Wire) and methyl methacrylate, poly-p-phthalic polymer. In this embodiment, the pixel electrode 111 includes a three-layer structure of ITO layer/Ag layer/ITO layer, wherein the thickness of the ITO layer on both sides of the Ag metal layer is about equal to

(1-0.1 nm), the intermediate Ag layer has a thickness of approximately

The ITO layers on both sides of the pixel electrode 111 have good affinity for metal Ag, and can match the work function of the pixel electrode 111, so that the pixel electrode 111 has a high hole injection rate. The common electrode 131 includes an Ag metal layer having a thickness of about

Since the ITO layer is transparent and the Ag layer has a small thickness, the pixel electrode 111 can transmit visible or invisible light. In other or alternative embodiments, the Ag layer may be about thick

Or

Other values in between. The thickness of the ITO layer on both sides may be about

Fig. 4A is a schematic cross-sectional view of a portion of the display device 1 shown in fig. 1. In this embodiment, the reflective layer 10 includes an optical film 101, the optical film 101 may be composed of a plurality of optical film layers having different refractive indexes for visible light, infrared light, or near-infrared light, and parameters such as refractive indexes and thicknesses of the optical film layers may be adapted to make the optical film 101 have different optical characteristics for visible light, infrared light, or near-infrared light, such as different reflectivities and transmittances. For example, but not limited to, the optical film 101 has an average reflectance of 80% or more and an average transmittance of 20% or less for visible light with a wavelength of 380nm (nanometers) to 700 nm; meanwhile, the optical film 101 has an average transmittance of 80% or more for near infrared light having a wavelength of 830nm or more.

In the above or modified embodiment of the present invention, the reflectance or transmittance represents an average reflectance or average transmittance at a corresponding wavelength or wavelength range.

In other or modified embodiments of the present invention, the reflectance or transmittance represents a reflectance or transmittance of a center wavelength in a corresponding wavelength or wavelength range. The center wavelength is the wavelength of the component with the largest energy in the wavelength range interval.

Further, the optical film 101 has different optical characteristics for visible light with different wavelengths or different colors, and the optical film 101 is capable of reflecting a specific wavelength or a specific color of visible light and transmitting other wavelengths of visible light. For example, but not limiting of, the optical film 101 can reflect red light and transmit green and blue light; or the optical film 101 can reflect green light and transmit red light and blue light; or the optical film 101 can reflect blue light and transmit red light and green light.

In this embodiment, the optical film 101 may be made of a non-conductive material and has no conductivity. In a modified embodiment of this embodiment, the optical film 101 may have conductivity.

In a modified embodiment of this embodiment, the optical film 101 and the pixel electrode 111 may be integrated into a single layer or a multi-layer structure having optical characteristics and conductive characteristics that reflect a light beam of a specific wavelength or a specific color and transmit light beams of other wavelengths and infrared light or near-infrared light.

In a modified embodiment of this embodiment, the optical film 101 may be an interference filter that reflects visible light having a short wavelength and transmits infrared light or near infrared light having a long wavelength.

Please refer to fig. 4B and fig. 4C, which are schematic partial structural cross-sectional views of another embodiment of the display device 1 shown in fig. 1. The display device 1 is substantially the same as the structure shown in fig. 4A, except that the pixel electrode 111 includes a metal layer (in this embodiment, the metal layer is an Ag layer) 1111 and an ITO layer 1112 provided on the Ag layer. The Ag layer 1111 is a grid-like structure having one or more openings, and the ITO layer 1112 covers the Ag layer 1111 and the optical film 101. The present embodiment has an advantage in that, by providing the Ag layer 1111 structure in the pixel electrode 111 as an open structure, visible light and/or near infrared light has a high transmittance when passing through the open portion of the Ag layer in the pixel electrode 111. In this embodiment, for a pixel unit, the proportion of the area of the Ag layer of the pixel electrode in the light emitting area of the pixel unit is about 10%, or about 20%, or about 10% to about 20%. The average thickness of the Ag layer is about

Alternatively, the opening sizes of the metal layers or Ag layers 1111 may be the same or different.

Referring to fig. 5, in the present embodiment, the optical film 101 may include a high-reflection film 1001 formed by multiple dielectric films, where the high-reflection film 1001 includes multiple dielectric films 1002H and 1002L alternately arranged according to refractive indexes, where the dielectric film 1002H has a higher refractive index and a refractive index greater than that of a substrate material; the dielectric film 1002L has a lower refractive index than the dielectric film 1002H. The highly reflective film 1001 can reduce the transmitted light beam of the light beam of a specific wavelength or a specific color and increase the reflected light beam of the specific wavelength or the specific color for the light beam of the specific wavelength or the specific color, that is, the highly reflective film 1001 has a high reflectance to an incident light beam, particularly an incident light beam in a normal direction. The thicknesses of the dielectric films 1002H and 1002L may be λ/4, where λ represents a central wavelength of the light beam reflected by the optical film 101 in air. Generally, reflection of a light beam from an optically thinner medium into an optically denser medium results in a half-wave loss of reflected light, i.e. the phase of the reflected and incident light has a shift of pi. And when the light beam is vertically incident,

since a beam always reflects and refracts simultaneously at the interface of two media, the energy of a beam for any medium includes, from an energy perspective, a reflected portion, a transmitted portion, and a portion lost in the medium. Since the dielectric films 1002H and 1002L have extremely low light energy loss and are negligible, the reflectivity of the highly reflective film 1001 to other light beams other than the specific wavelength λ is low and the transmittance is high, for example, but not limited to, the reflectivity of the highly reflective film to other light beams other than the specific wavelength λ is less than 20%, and the transmittance is greater than 80%; the reflectivity of the light beam with the wavelength lambda is more than 80 percent, and the transmittance is less than 20 percent.

The high-reflection film has different refractive indexes according to different preparation materials. For example, a dielectric film made of ZnS material has a refractive index of about 2.35; the refractive index of the high-reflection film prepared using MgF2 was about 1.38. The high-reflection film is formed by alternately stacking a plurality of dielectric films with different refractive indexes according to the refractive indexes, and can achieve the reflectivity of more than 80% or 90% and the transmittance of less than 20% or 10% for specific wavelength or specific color light beams.

Further, the optical film 101 may include a stack of one or more highly reflective films 1001 having a high reflectivity for a light beam of a certain wavelength, so that the reflectivity of the optical film 101 for the light beam of the wavelength may be further improved.

Further, the optical film 101 may include one or more highly reflective films 1001 having high reflectivity for light beams of different wavelengths, so that the optical film 101 has high reflectivity for the light beams of different wavelengths.

Further, the high-reflectivity film 1001 may include a plurality of dielectric films 1002 with different thicknesses, for example, a plurality of dielectric films with thicknesses sequentially increasing to or decreasing from one another, so that the high-reflectivity film 1001 may achieve a higher reflectivity for a light beam in a certain wavelength range. For example, the high-reflection film 1001 includes 100 dielectric films, and the thicknesses of the dielectric films are 100nm, 101nm, 102nm … … and 199nm, so that the high-reflection film 1001 has a high reflectivity for light beams with wavelengths ranging from 400nm to 800nm, and can reach 50% or more in general. The high-reflection film 1001 is overlapped in a plurality of ways, so that the reflectivity of the high-reflection film to light beams with the wavelength ranging from 400nm to 800nm can be further improved to be more than 80% or more than 90%.

In an embodiment of the present invention, the high reflective film 1001 may be prepared by the following method:

providing a plurality of dielectric films with high refractive index and low refractive index, wherein the thickness of the dielectric films is in micron or millimeter level;

sequentially stacking the dielectric films according to the refractive index in an alternating manner to form a high-reflection film blank;

extruding and stretching the plurality of dielectric films to a thickness of about 1/4 a for a particular wavelength;

and forming a high-reflection film.

In an embodiment of the present invention, the high reflective film 1001 may also be prepared by alternately performing multiple vapor deposition on the dielectric film with high refractive index and low refractive index.

In the above embodiment of the present invention, the high-reflection film 1001 or the optical film 101 is formed on the substrate 30. Other or variations of the present invention are embodiments where the reflective layer 10, including the high-reflection film 1001 or the optical film 101, may serve as a substrate on which the TFT matrix and the pixel unit are formed.

In this embodiment, the optical film 101 has a high reflectivity for visible light and a high transmittance for near-infrared light. For example, but not limited to, the average reflectivity of the optical film 101 is greater than 30%, or greater than 50%, or greater than 70%, or greater than 80%, or greater than 90% for visible light, and the transmittance for near infrared light is greater than 80%, or greater than 90%.

In other or modified embodiments of the present invention, the structure of the high reflection film 1001 may refer to contents related to chapter six and chapter seven of "thin film optics (fourth edition)", (h.angus Macleod, xudhi, published by scientific publishing company).

In the above and modified embodiments of the present invention, the pixel electrode 111 and the common electrode 131 are made of different materials, which may result in different light emitting directions. Generally, an Organic Light Emitting (OLED) display screen or an AMOLED display screen may be classified into a top emission type, a bottom emission type, or a double-side emission type according to a light emitting direction. Therefore, the display device 1 may also be classified as a top emission type, a bottom emission type, or a double-side emission type. The pixel cells of the display device 1 may be of a single-side emission type (corresponding to top emission or bottom emission of the display device 1) or a double-side emission type (corresponding to double-side emission of the display device 1), respectively. In this embodiment, the display device 1 is of a top emission type. I.e. the light beam generated by the light-emitting layer 12 is emitted to the outside through said second electrode layer 13. The second electrode 13 is adjacent to a side of a display area of the display device 1 for displaying, and a display light beam can be emitted from the second electrode to the outside of the display device 1.

In other or modified embodiments of the present invention, the display device 1 may be a bottom emission type, a double-side emission type, or other types.

The reflective layer 10, the first electrode layer 11, the light emitting layer 12 and the second electrode layer 13 of the display device 1 may include a plurality of pixel units, each pixel unit includes a different pixel electrode 111, an optical film 101 and a light emitting unit 121. All the pixel units correspond to the common electrode 131 in common. The plurality of pixel units can have various different arrangement modes such as grids, arrays, triangles, honeycombs, squares and the like on a two-dimensional plane.

The pixel unit comprises the optical film 101, a pixel electrode 111, a light emitting unit 121 and a common electrode 131 which are sequentially arranged from bottom to top. The area corresponding to the pixel electrode 111 of the pixel unit can be regarded as the light-emitting area of the pixel unit, and the light-emitting areas of a plurality of pixel units constitute the light-emitting area of the display device 1.

In this embodiment, the area of the optical film 101 of the pixel unit is larger than the area of the corresponding light-emitting unit 121, and is not overlapped with the optical films 101 of other pixel units; or the projection of the optical film 101 of the pixel unit in the vertical direction covers the corresponding light emitting unit 121 and does not overlap with the optical films 101 of other pixel units.

The substrate 30 shown in fig. 4 is a bottom gate type substrate, which includes a base 31, a gate electrode 36 and an insulating layer 32 provided on the base 31, a drain/source electrode 37 and a protective layer 33 provided on the insulating layer 32, a planarization layer 34 and a conductive channel layer 38 provided on the protective layer 33, a pixel defining layer 35 provided on the planarization layer 34, and a barrier 39 provided on the pixel defining layer 35. The gate electrode 36 and the drain/source electrode 37 constitute an NMOS type thin film transistor. The gate electrode 36, drain/source electrode 37 and conductive channel layer 38 together form part of a thin film transistor matrix. In fact, a plurality of gate electrodes 36 and drain/source electrodes 37 are disposed on the substrate 30, and the corresponding gate electrodes 36 and drain/source electrodes 37 may constitute a Thin Film Transistor (TFT). Each pixel unit corresponds to one or more thin film transistors.

The insulating layer 32 and the protective layer 33 may be made of SiNx, SiO2, or the like. The conductive channel layer 38 may be made of a multilayer metal structure of Ti/Al/Ti. The planarization layer 34 may be made using SiNx or an organic material. The pixel defining layer 35 and the blocking layer 39 may be made of an organic material. The gate electrode 36 and the drain/source electrode 37 may be made of molybdenum (Mo) or aluminum (Al).

In other or modified embodiments of the present invention, the substrate 30 may be a top gate substrate. The gate electrode 36 and the drain/source electrode 37 on the substrate 30 constitute a PMOS type thin film transistor. The substrate 30 shown in fig. 4 is only schematically represented with respect to the gate electrode 36, the drain/source electrode 37, and the respective layer structures, and is not limited in any way as to their number, shape, structure, and positional relationship.

The optical film 101 is disposed between the planarization layer 114 and the pixel electrode 111, and reflects visible light transmitted through the pixel electrode 111 and directly transmits infrared light or near-infrared light. The pixel electrode 111 is connected to the conductive channel layer 38 and disposed on the optical film 101. The light emitting unit 121 is disposed between the pixel electrode 111 and the common electrode 131, and the common electrode 131 covers the light emitting unit 121 and the pixel defining layer 35. The blocking portions 39 are used to separate adjacent light emitting units 121, so that the adjacent light emitting units 121 do not affect the light emitting effect mutually. The light emitting unit 121 is capable of emitting visible light and may be used as a display beam of the display device 1, and thus the display beam includes the visible light emitted by the light emitting unit 121. In the present embodiment, the plurality of light emitting units 121 emit one or more of red light, green light, or blue light, respectively, as display light beams required for image display of the display device 1.

Fig. 6 is a schematic top view of an internal portion of the display device 1 shown in fig. 4. The substrate 30 further includes a plurality of scan lines gl (gateline), a plurality of data lines dl (dataline), a plurality of power lines pl (powerline), a plurality of storage capacitors cs (storage capacitor), a plurality of switching transistors ts (switching transistor), and a driving transistor td (driving transistor). The scanning lines GL, the data lines DL and the power lines PL are connected to a driving circuit (not shown) of the display device 1 for applying a driving signal and a power voltage of the driving circuit to the corresponding pixel cells. The data lines DL and the power lines PL are arranged in parallel, and the scan lines GL are overlapped with the data lines DL and the power lines PL. Specifically, taking a pixel unit as an example, the scanning line GL is connected to the gate of a switching transistor TS, the source of the switching transistor TS is connected to the data line DL, the drain of the switching transistor TS is connected to the gate of a driving transistor TD, the source of the driving transistor TD is connected to the power line PL, and the drain of the driving transistor TD is connected to the pixel electrode 111; two ends of one storage capacitor CS are respectively connected to the gate and the source of the driving transistor TD. When the gate of the switching transistor TS is gated by the scanning line GL, the drain and the source of the switching transistor TS are turned on, a data voltage signal (which may also be referred to as a gray-scale voltage signal) on the data line DL charges the storage capacitor CS through a leakage current and temporarily stores the charge in the form of a charge, and when the level of PL turns on the driving transistor TD, the charge on the storage capacitor CS is applied to the pixel electrode 111 through the drain current of the driving transistor TD, so that the corresponding light emitting unit 121 can emit light.

As shown in fig. 4 and 6, the optical film 101 is disposed under the pixel electrode 111 without affecting the current path of the pixel electrode 111 and the corresponding light emitting unit 121. The pixel electrode 111 can supply hole carriers to the corresponding light emitting unit 121. The common electrode 131 can supply electron carriers to the light emitting unit 121. The light emitting unit 121 can emit a display beam driven by the pixel electrode 111 and the common electrode 131, and the display beam is visible light including red light, green light, and blue light in this embodiment.

Referring to fig. 7, a light emitting unit 121 according to the embodiment shown in fig. 1 includes a hole injection layer 1201, a hole transport layer 1202, a light emitting material layer 1203, an electron transport layer 1204 and an electron injection layer 1205 sequentially disposed on the pixel electrode 111. The pixel electrode 111 is connected to a driving circuit of the display device 1 and supplied with a high level voltage, and the second electrode 131 is connected to the driving circuit of the display device 1 and supplied with a low level voltage. The electron carriers of the second electrode 131 flow to the light emitting material layer 1203 via the electron injection layer 1205 and the electron transport layer 1214, and the hole carriers of the pixel electrode 111 flow to the light emitting material layer 1203 via the hole injection layer 1201 and the hole transport layer 1202. When the electrons and the holes meet in the light emitting material layer 1203, they are combined by the coulomb force to generate excitons (exiton). The excitons transfer energy to organic light emitting molecules in the organic light emitting material under the action of an electric field force. The organic light emitting molecules absorb energy and transition from a ground state to an excited state. Since the organic light emitting molecules in the excited state are unstable and need to return to a stable ground state by spontaneous emission, energy is released in the process by way of photons, and thus the light emitting unit 121 can emit visible light, so that the light emitting layer 12 can be used for the display device 1 to emit light and display images. Also, different light emitting units 121 can emit light beams of different colors due to different energy level differences (bandgaps) of the organic light emitting materials of the light emitting units 121. For example, the light emitting unit 121 can emit red, green, or blue light.

In the embodiments and modifications of the present invention, the light emitting unit 121 may have various different structures. For example, but not limited to, the light emitting unit 121 may include a hole injection layer, a hole transport layer, a light emitting material layer, and an electron transport layer sequentially disposed from bottom to top; or the light-emitting diode comprises a hole transport layer, a light-emitting material layer and an electron transport layer which are sequentially arranged from bottom to top. The structure and composition of the light emitting unit 121 are only schematically illustrated in the present specification and the drawings, and are not limited thereto.

When the light emitting unit 121 emits light, the direction of the emitted light beam is not limited to a specific direction, but is emitted divergently in all directions in space. Part of the light beams emitted by the light emitting unit 121 directly exit to the outside through the common electrode 131, part of the light beams are reflected by the common electrode 131, then reach the optical film 101 through the pixel electrode 111, and can be reflected by the optical film 101, and then reach the outside through the pixel electrode 111 and the common electrode 131 again.

The detection module 2 is at least partially arranged below the display device 1 and can receive and/or emit a detection light beam through the display device 1. The detection beam may be external visible light or near-infrared light, such as visible light or near-infrared light emitted or reflected by an external object itself; the visible light or near-infrared light emitted by the detection module 2 may be a light beam that is emitted to the surface or outside of the display device 1 and reflected by an external object, and the visible light or near-infrared light reflected by the external object passes through the display device 1 and is received by the detection module. Such as, but not limited to: human face, fingerprint, iris, body temperature, heart rate, pulse, capillary vessels, etc., and other external objects having detectable and identifiable biological characteristics. The detection module 2 can be used for detecting the biological characteristics of an external object, such as but not limited to fingerprint, heart rate, body temperature, etc.; an image of the external object is rendered, for example, spatial coordinates of the external object are detected. Referring to fig. 8, the detection module 2 may include a transmitting unit 21 and a receiving unit 22. The transmitting unit 21 and the receiving unit 22 may be separate chip units or may be integrated into one chip unit. The receiving unit 22 can receive the second detection light beam 202 through the display device 1 and convert the second detection light beam into an electrical signal, and the transmitting unit 21 can transmit the first detection light beam 201 through the display device 1. The first detection light beam 201 and the second detection light beam 202 are collectively referred to as a detection light beam, and in this embodiment, the detection light beam may be visible light and/or infrared light or near-infrared light. When the first detection light beam 201 and the second detection light beam 202 are near-infrared light, the detection module 2 can detect whether an external object approaches or not, or detect a motion state of the external object, or detect biometric information of the external object, or the like according to the first detection light beam 201 and the second detection light beam 202. When the first and second detection light beams 201 and 202 are visible light, the first detection light beam 201 can be used as compensation light in a low-illumination environment where ambient light is dark or a high-illumination environment where ambient light is bright. For example, but not limited to, the emission unit 21 includes a flash lamp that can be used for supplementary lighting. At this time, the second detection light beam 202 received by the receiving unit 22 of the detection module 2 may include: the detection module 2 can better realize the imaging of the external object or the image drawing of the external object by using the emission unit 21 to emit visible light for light supplement.

In this embodiment or a modified embodiment, the detection module 2 includes one or more receiving units 22, and the receiving unit 22 may include a visible light image sensor and/or an infrared light image sensor. The detection module 2 may further include one or more of a lens, a micro lens, and a collimator. In the embodiment and the modified embodiment of the present invention, the receiving unit 22 may be disposed below the display device 1; the emitting unit 21 is disposed either below the display device 1, or on the side of the display device 1, or integrated in the display device 1. For example, but not limited to, the emitting unit 21 is disposed at a side of the display device 1 at an interval or in close contact therewith. The side includes, but is not limited to, lateral posterior, lateral anterior, lateral superior, lateral inferior, or partial side, etc. In other or modified embodiments of the present invention, the front surface of the display device 1 has a display Area (an Active Area, AA Area) corresponding to the pixel unit, and a non-display Area outside the display Area. The surface of the display device 1 for image display is referred to as the front surface. The transmitting unit 21 may also be disposed corresponding to the non-display area. At this time, the emitting unit 21 may directly emit the first detection beam 201 onto an external object without transmitting through the display device 1. The display region includes a light emitting region of the pixel unit and a non-light emitting region of the pixel unit and a gap region between the pixel units.

Referring to fig. 9, in a modified embodiment of the above embodiment, the emitting unit 21 includes a light emitting array 211 and/or a diffractive Optical Element (diffractive Optical Element)212, the light emitting array 211 includes a plurality of light emitting elements arranged in a two-dimensional pattern, the diffractive Optical Element 212 is disposed on the light emitting array, and the diffractive Optical Element 212 can split and copy the patterned light beam emitted by the light emitting array and project the light beam to a space.

The diffractive optical element 212 may be disposed below the substrate 30 of the display device 1, in the substrate 30, or in the protective cover 14. As shown in fig. 9, the diffractive optical element 212 may be formed in the substrate 30 by photolithography of the lower surface of the substrate 30.

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 (e.g. a finger or a human face) and then transmitted through the display device 1 to be received by the receiving unit 22.

In a further embodiment, when the detection module 2 is used for fingerprint detection and identification, the transmitting unit 21 and the receiving unit 22 are both disposed below the display device 1.

In a further embodiment, when the detection module 2 is used for face detection and recognition, the transmitting unit 21 is disposed on a side or above the display device 1, or the transmitting unit 21 is integrated in the display device 1; the receiving unit 22 is disposed below the display device 1.

The detection module 2 can transmit and/or receive a detection light beam through the display device 1. The transmitting unit 21 can transmit a detection beam to an external object through the display device 1 or directly transmit a detection beam to an external object, and the receiving unit 22 can receive the detection beam reflected by the external object through the display device 1. The receiving unit 22 is also capable of receiving other light beams emitted or reflected by an external object through the display device 1. The detection light beam can be used for detection and identification of biometric information of an external object, or for two-dimensional and/or three-dimensional image rendering or imaging of an external object, or the like.

Therefore, the emitting unit 21 can be used to emit the first detection beam 201, and the first detection beam 201 can be emitted to the outside through the display device 1. The receiving unit 22 can be configured to receive a second detection light beam 202, and the second detection light beam 202 can include a light beam that is transmitted through the display device 1 to the receiving unit 22. For example: the second detection beam 202 may include the first detection beam 201 reaching the receiving unit 22 after passing through the display device 1 in the reflected light after being reflected on the external object. In this case, the second detection beam 202 is substantially a reflected beam of the first detection beam 201 on an external object. By the emitting unit 21 emitting the first detection light beam 201 and the receiving unit 22 receiving the second detection light beam 102, the detection module 2 can obtain two-dimensional and/or three-dimensional image information or biometric information of the external object. The external object may be a finger, face, iris, skin, capillary vessel or other object having a recognizable biometric characteristic of the user.

Furthermore, the second detection beam 202 may also comprise other beams emitted or reflected by external objects instead of the reflected beam of the first detection beam 201. For example, the second detection beam 202 may further include visible light emitted or reflected by the external object, and the receiving unit 22 may further be capable of receiving the second detection beam 202 of the visible light reflected by the external object so as to obtain visible light image information of the external object.

The detection module 2 can acquire two-dimensional image information or biometric information of the external object by collecting the second light beam 202 reflected or emitted by the external object. The detection module 2 may further include a processing unit (not shown), which is capable of calculating depth information of the external object according to the received second light beam 202, and further obtaining three-dimensional feature information about the external object. In a modified embodiment, the processing unit comprises a pre-stored reference pattern, and the depth information of the external object can be obtained by calculating the offset of the pattern corresponding to the second light beam 202 with respect to the reference pattern. Such as, but not limited to, an Application Processor (AP), or a Microcontroller (MCU), or a Central Processing Unit (CPU). In a further embodiment, the processing unit further stores the biometric information data in advance, and the processing unit is capable of detecting and identifying the biometric characteristic of the external object by comparing the obtained two-dimensional information and/or depth information of the external object with the biometric information data stored in advance, such as but not limited to: fingerprint recognition, face recognition, iris recognition, and the like. The detection and identification of the biological characteristics comprise the processes of acquisition, data processing, comparison and the like of biological characteristic information of an external object.

In a further embodiment, the detection module 2 further includes a memory, the memory stores the biometric information data in advance, and the processing unit can compare the obtained two-dimensional information and/or depth information of the external object with the biometric information data stored in advance, so as to implement biometric detection and identification of the external object.

In other or modified embodiments of the present invention, the emitting unit 21 may be omitted, and the visible light emitted or reflected by the external object is used as the detection light beam. The receiving unit 22 is capable of receiving visible light reflected or emitted by an external object through the display device 1 and generating a corresponding electrical signal, and the visible light imaging light beam includes red light, green light and blue light, so that the detection module 2 can implement two-dimensional and/or three-dimensional color image drawing or imaging of the external object. Through detecting and identifying the biological characteristics of the external object, the detection module 2 can be applied to locking or unlocking of the electronic equipment 100, online payment service verification, authentication of a financial system or a public security system, passage verification of an access control system and other various products and application scenes. The electronic device 100 may be a mobile phone, a mobile terminal, an intelligent watch, a multimedia player, a tablet computer, a notebook computer, intelligent glasses, an intelligent home device, a security device, an intelligent robot, an intelligent automobile device, and the like.

The light emitting unit 121 is configured to emit a display light beam, the pixel electrode 111 is capable of transmitting the detection light beam and the display light beam, and the common electrode 131 is capable of transmitting the display light beam and the detection light beam. Generally, the display light beam emitted by the light emitting unit 121 is visible light, and the visible light may be one or a mixture of red light, green light, or blue light.

Alternatively, in other or modified embodiments, the light emitting unit 121 or the pixel unit can emit a single color light beam. The single color light beam includes, but is not limited to, a mixture of one or more of red, green, and blue light, or visible light formed from multiple mixtures of red, green, and blue light.

In the embodiment or the modified embodiment of the present invention, the first detecting beam 201 and the second detecting beam 202 are invisible light, preferably near infrared light with a wavelength of 850 nanometers to 1000 nanometers (nm), for example, near infrared light with a wavelength of 940 nm. In other or modified embodiments of the present invention, the first light beam 101 and the second light beam 102 may be one or more of visible light, invisible light, ultraviolet light, near-infrared light, ultrasonic wave, and electromagnetic wave.

In the embodiment or the modified embodiment, the first detection beam 201 or the second detection beam 202 may be one or more of floodlight, speckle structured light, coded structured light, and modulated pulse signal.

Fig. 10 and fig. 11 are schematic diagrams of a transmittance curve and a reflectance curve of an embodiment of the optical film 101 of the display device 1 of the electronic device 100 according to the present invention. The optical film 101 has a light beam reflectivity of less than 800nm and a light beam transmittance of more than 90% and more than 900 nm.

Referring to fig. 12 and 13 together, fig. 12 is a schematic view of an alternative embodiment of the electronic device 100 shown in fig. 1, and fig. 13 is a schematic partial cross-sectional view taken along line a-a in fig. 11. The line a-a is a straight line approximately parallel to the top (or bottom) edge of the display device 1.

The electronic device 100 includes a display device 1 and a detection module 2 at least partially disposed under the display device 1. The detection module 2 includes a transmitting unit 21 and a receiving unit 22. The transmitting unit 21 is disposed corresponding to one non-display area 1000 of the display device 1. The non-display area 1000 may be a non-display area formed by opening or cutting an edge or an inner portion of the display device 1, or a light-transmitting area formed by not disposing a light-emitting material on the non-display area 1000 of the display device 1 during manufacturing, or other types of non-display areas. The non-display area 1000 is capable of transmitting a detection light beam emitted from the emission unit 21.

In this embodiment, the non-display area 1000 has an arc-shaped groove or a V-shaped groove structure (commonly referred to as Notch). As shown in fig. 12, the non-display area 1000 is located at the top middle of the front display area of the display device 1, and may also be referred to as a bang of the display device 1, a beauty tip, a water drop, or the like.

The number of the receiving units 22 is two, the two receiving units 22 are arranged adjacent to or at a smaller distance, and the two receiving units 22 and the transmitting unit 21 are arranged at a larger distance. A connecting line between the transmitting unit 21 and the receiving unit 22 is referred to as a baseline, and in this embodiment, the baselines of the transmitting unit 21 and the two receiving units 22 coincide with each other. The distance between the transmitting unit 21 and the receiving unit 22 is greater than the distance between two receiving units 22.

For example, but not limited to, the two receiving units 22 are disposed at intervals of 5 millimeters (mm), and the transmitting unit 21 and the two receiving units 22 are disposed at intervals of 25mm and 30mm, respectively.

Referring to fig. 14 and 15, fig. 14 is a schematic view of another modified embodiment of the electronic device 100 shown in fig. 1, and fig. 15 is a schematic partial cross-sectional view taken along line B-B in fig. 14. The line B-B is a straight line approximately parallel to the top (or bottom) edge of the display device 1.

The electronic device 100 includes a display device 1 and a detection module 2 at least partially disposed under the display device 1. The detection module 2 includes a transmitting unit 21 and a receiving unit 22. The transmitting unit 21 is disposed corresponding to one non-display area 1000 of the display device 1. In the display device 1, no light emitting layer material is disposed in the non-display area 1000 and/or other light transmissive materials are filled in the non-display area 1000 during manufacturing to form the non-display area 1000. The non-display area 1000 has a transmittance of more than 80% for the detection beam emitted from the emission unit 21.

In this embodiment, the base lines of the transmitting unit 21 and the two receiving units 22 have substantially the same length, and the base lines of the transmitting unit 21 and the two receiving units 22 do not coincide with each other. The distance between the transmitting unit 21 and the two receiving units 22 is larger than the distance between the two receiving units 22.

Please refer to fig. 16, which is a diagram illustrating another modified embodiment of the electronic device 100. The electronic device 100 includes a display device 1 and a detection module 2, the detection module 2 includes an emitting unit 21 and two receiving units 22, the emitting unit 21 can emit a detection beam onto an external object 200, and the detection beam is reflected by the external object 200 and then received by the two receiving units 22 through the display device 1.

The two receiving units 22 can receive the detection light beams emitted or reflected by the external object 200 through the pixel units of the display device 1 simultaneously or time-divisionally. The detection beams received by the two receiving units 22 simultaneously or in time division can be used for detecting the biometric features of the external object 200 at a time or imaging the external object 200 at a time. It should be noted that the single biometric detection includes a complete process of the multiple receiving units 22 respectively acquiring the biometric information of the external object 200, processing the biometric information, comparing the pre-stored reference biometric information, and outputting a detection or identification result. The single imaging includes the plurality of receiving units 22 respectively acquiring image information of the external object 200, processing the image information, and outputting an image of the external object.

In further embodiments, the two receiving units 22 can be used for one or more of two-dimensional and/or three-dimensional biometric detection and identification, image rendering, imaging, spatial coordinate detection, respectively, of the external object 200. For example, but not limiting of, the two receiving units 22 may be used for detecting biometric information and imaging of the external object 200, respectively, or the two receiving units 22 may be used for detecting two-dimensional and/or three-dimensional biometric information of the external object 200 at the same time.

In further embodiments, the two receiving units 22 can be used together for one or more of two-dimensional and/or three-dimensional biometric detection and identification, image rendering, spatial coordinate detection of the external object 200. For example, but not limiting of, the two receiving units 22 can be used together for detecting a biometric feature of the external object 200.

At this time, the two receiving units 22 respectively receive the detection light beams reflected or emitted by the external object 200 through the display device 1, the detection light beams reflected by the external object 200 containing the biometric information or the image information of the external object 200.

The two receiving units 22 respectively obtain at least part of the biological feature information of the external object 200, and perform calculation and comparison through a processor circuit (not shown) of the detection module 2, so that the detection efficiency of the biological feature of the external object can be effectively improved. In addition, since the display device 1 includes a plurality of pixel units, there are regions in which portions are low in transmittance to the detection beam or even are opaque. Therefore, the display device 1 may block (including reflect or absorb) a part of the detection light beams that enter the display device 1 after being reflected by the external object 200. The detection beam received by the receiving unit 22 can be considered as a portion that is blocked by the display device 1 and then transmitted. Since the pixel cells of the display device 1 are usually arranged in a matrix array, the blocking of the detection beam by the display device 1 is similar to the blocking of the light beam passing through by an opaque grid.

Compared to using one receiving unit 22 for biometric acquisition of the external object 200, using two receiving units 22 can receive more detection beams reflected from the external object 200, thereby potentially acquiring more effective biometric information of the external object 200. The use of two receiving units 22 can effectively reduce the blocking effect of the display device 1 on the detection light beams.

Please refer to fig. 17, which is a diagram illustrating another modified embodiment of the electronic device 100 shown in fig. 1. The electronic device 100 includes a display device 1 and a detection module 2 disposed at least partially under or behind the display device. The detection module 2 includes a transmitting unit 21 and a receiving unit 22. In this embodiment, the receiving unit 22 can acquire the biometric information or the image information of the external object 200 at different acquiring positions for multiple times and is used for detecting the biometric characteristic of the external object 200 at a single time or imaging the external object at a single time.

In this embodiment, the transmitting unit 21 is disposed corresponding to a non-display area 1000 of the display device 1. The transmitting unit 21 can transmit a detection beam onto the external object 200, and the detection beam is reflected by the external object and then transmitted through the display device 1 to be received by the receiving unit 22. In other or modified embodiments, the emitting unit 21 may also be disposed below or at the back of the display device 1.

The receiving unit 22 can perform one or more movements and receive the detection beam transmitted through the display device 1 at the moved position during the period when the transmitting unit 21 transmits the detection beam to the external object 200 or during the period when the detection beam is transmitted through the display device 1 after being reflected by the external object 200.

Fig. 18 is a partial cross-sectional view of the electronic device 100 of fig. 17 along the line C-C. Wherein the cross-sectional line C-C is perpendicular to a straight line on which a line (i.e., a base line) between the transmitting unit 21 and the receiving unit 22 is located.

When the electronic device 100 is in operation, the transmitting unit 21 is activated and transmits the detection beam according to a driving signal of an application processor or other driving circuit, and the receiving unit 22 is activated substantially simultaneously with the transmitting unit 21.

The receiving unit 22 receives the detection light beam transmitted through the display device 1 after being reflected by the external object 200 at an initial position (i.e., an initial acquisition position), and completes the first acquisition of the characteristic information of the external object 200.

Then, after the receiving unit 22 moves a certain distance Δ P to a second collecting position, the receiving unit 22 receives the detection light beam reflected by the external object 200 and transmitted through the display device 1 again, and completes the second collection of the characteristic information of the external object 200.

Then, the receiving unit 22 moves to the initial position to be reset, and ends the characteristic information collection of the external object 200. The detection module 2 can implement two-dimensional and/or three-dimensional biological feature detection, two-dimensional and/or three-dimensional image drawing or imaging, or two-dimensional and/or three-dimensional space coordinate detection of the external object 200 according to the external object feature information acquired twice by the receiving unit 22.

The above-mentioned characteristic information collection means that the receiving unit 22 receives the detection light beam reflected by the external object 200 and transmitted through the display device 1, and converts the detection light beam into a corresponding electrical signal for processing and storing. The above-mentioned certain distance Δ P is, for example, the length of one pixel unit, or the length of 5 pixel units, or 100 micrometers, etc.

In this embodiment, the movement of the receiving unit 22 by a certain distance Δ P in the initial position is downward along a direction perpendicular to the base line between the transmitting unit 21 and the receiving unit 22. In other or modified embodiments, the receiving unit 22 may also be moved upward in a direction perpendicular to the baseline direction.

In this embodiment, the receiving unit 22 returns to the initial position after moving from the initial position once, and the whole process performs two acquisitions. In other or modified embodiments, the receiving unit 22 may move from the initial position to different directions to reach different acquisition positions, and perform a plurality of feature information acquisitions on the external object 200 at each acquisition position, such as two acquisitions, three acquisitions, four acquisitions, and so on. By acquiring the biological characteristic information or the image information of the external object 200 for a plurality of times in the above embodiment, more information and images can be obtained during a single (or: one) photographing or detecting action, thereby having a better imaging effect than that of a single acquisition.

In summary, in the above-mentioned embodiment or the modified embodiment, the electronic device 100 can be used for biometric detection and recognition of the external object 200, such as fingerprint detection and recognition, face detection and recognition, or the like, of the external object 200; or for imaging of the external object 200. The detection module 2 is at least partially disposed under the display device 1. The detection module 2 can transmit and/or receive a detection light beam through the display device 1, and the detection light beam can be used for one or more of two-dimensional and/or three-dimensional biological feature detection and identification, image drawing and space coordinate detection of the external object 200. The detection module 2 includes two receiving units 22 disposed below the display device 1 and an emitting unit 21 disposed corresponding to the non-display area 1000 of the display device 1. The receiving unit 22 is capable of one or more of two-dimensional and/or three-dimensional biometric detection and identification, image rendering, and spatial coordinate detection, respectively or collectively, of the external object 200. The detection light beam is visible light or invisible light. Preferably, the detection beam is near infrared light, such as near infrared light with a wavelength of 940 nm. The image module 4 can transmit and/or receive visible light through the display device 1, and is used for imaging an external object 200 such as a photograph or a video.

It should be noted that the present invention is not limited to this, and in other or modified embodiments of the present invention, the emitting unit 21 may be disposed in the display area of the display device 1, or disposed below or on the back of the display device 1. The number of receiving units 22 may be 1, or 2, 3, more, etc.

Please refer to fig. 19, which is a diagram illustrating a further embodiment of the electronic device 100 shown in fig. 1. As described in the above embodiment, in this embodiment, the electronic apparatus 100 further includes a display device 1 and an image module 4 disposed below the display device 1.

The display device 1 comprises a substrate 30, a reflecting layer 10, a first electrode layer 11, a light emitting layer 12, a second electrode layer 13 and a protective cover plate 14 which are arranged from bottom to top in sequence. The display device 1 has a plurality of pixel units for image display. The first electrode layer 11 includes a plurality of pixel electrodes 111. The light emitting layer 12 includes a plurality of light emitting cells 121 corresponding to the pixel electrodes 111. The second electrode layer 13 includes a common electrode 131. The reflective layer 10 includes an optical film 101.

Please refer to fig. 20, which is a diagram illustrating a further embodiment of the electronic device 100 shown in fig. 19. The image module 4 includes a visible light image sensor 42. The visible light image sensor 42 can receive an imaging light beam for imaging through the common electrode 131, the light emitting unit 121, the pixel electrode 111, the optical film 101, and the substrate 30.

The image module 4 may further include a visible light emitter (not shown), and the visible light emitter emits an imaging light beam to the surface or the outside of the display device 1 through the substrate 30, the optical film 101, the pixel electrode 111, the light emitting unit 121, and the common electrode 131, and reaches the image module 4 through the common electrode 131, the light emitting unit 121, the pixel electrode 111, the optical film 101, and the substrate 30 in sequence after being reflected by an external object. The imaging light beam is visible light or invisible light.

The image module 4 comprises a visible light image sensor 42 capable of receiving an external imaging light beam through the display device 1, capable of receiving visible light and for two-dimensional and/or three-dimensional image rendering of an external object, or for imaging an external object and generating a corresponding color image. The image module 4 may further include an image processor for processing the digital image signal output by the visible light image sensor according to the visible light, and an image memory for storing image data. The image module 4 is, for example, but not limited to, a front camera under the screen.

In the embodiment of the present invention, the number of the visible light image sensors 42 of the image module 4 may be one or more, and the number of the receiving units 22 of the detection module 2 may be one or more. The detection module 2 and the image module 4 can realize drawing of two-dimensional and/or three-dimensional images of the external object based on Binocular Stereo Vision (Binocular Stereo Vision) and other technologies, or collect and identify two-dimensional and/or three-dimensional biological characteristic information of the external object, such as fingerprint identification or face identification under a screen; or to image an external object, such as a photograph or video. By the binocular stereo vision technique, two-dimensional image information or images collected by the plurality of receiving units 22 or the visible light image sensor 42 can be synthesized into three-dimensional image information or images.

Therefore, the detection module 2 or the image module 4 acquires two-dimensional image information or biological characteristic information of the external object by collecting the detection light beam or the imaging light beam reflected or emitted by the external object 200; or the detection module 2 or the image module 4 obtains depth information or three-dimensional image information of an external object through the received detection light beam or imaging light beam; or the detection module 2 obtains the depth information of the external object by calculating the difference between the pre-stored reference pattern and the received pattern of the detection beam; or the image module 4 acquires a two-dimensional and/or three-dimensional color image of the external object through the received imaging light beam.

When the image module 4 is in operation, for example, when the visible light image sensor 42 of the image module 4 receives an imaging light beam, the electronic device 100 turns off light emission in a partial region of the pixel unit of the display device 1. The partial region for turning off the light emission is defined as a light transmission region T. The area of the light-transmitting region T is larger than the area of the visible light image sensor 42 that receives the imaging light beam. The light-transmitting region T satisfies: in the light incidence direction of the imaging light beam reaching the visible light image sensor 42, the projection of the light transmission area T covers the projection of the visible light image sensor; or the light-transmitting area T is not smaller than the maximum range area of the imaging light beam capable of reaching the visible light image sensor 42 corresponding to the pixel unit or the second electrode layer 13 of the pixel unit.

In this embodiment, since the pixel unit of the display device 1 turns off the light emission of the corresponding light-transmitting area T when the visible light image sensor 42 works, the receiving of the imaging light beam by the visible light image sensor 42 is not affected by the light emission of the display device 1, so that the image module 4 has a better imaging effect.

In other or alternative embodiments, the image module 4 and the detection module 2 may be two independent modules, having separate driving circuits, signal processing circuits, etc. The image module 4 and the detection module 2 may also be integrated in one module.

In other or modified embodiments of the present invention, the receiving unit 2 of the detection module 2 is transmitting through the display device 1 to receive the detection beam, when the detection beam is visible light, the display device 1 will correspond to the pixel unit of the partial region of the receiving unit 2 to close the light emission. The area or range corresponding to the pixel unit turned off to emit light may refer to the light-transmitting area T. In the light incidence direction of the detection light beam reaching the receiving unit 22, the projection of the area corresponding to the pixel unit which is turned off to emit light covers the projection of the receiving unit 22; or the area corresponding to the pixel unit which is turned off to emit light is not less than the maximum range area of the imaging light beam which can reach the receiving unit 22 corresponding to the pixel unit or the second electrode layer 13 of the pixel unit.

In a modified embodiment of the above embodiment, the pixel cells in the light-transmitting region T of the display device 1 may be turned off to emit light wholly or partially. The light-transmitting region T may have one or a combination of a circular shape, a square shape, a triangular shape, an elliptical shape, and a polygonal shape. The light-transmitting region T may display a predetermined pattern or icon when the light emission is partially turned off. The display device 1 may display a predetermined Graphic User Interface (GUI) in a display region other than the light transmission region T.

Referring to fig. 21, in a modified embodiment of the display device 1 of the electronic apparatus 100, the display device 5 includes a substrate 50, a first electrode layer 51, a light emitting layer 52, and a second electrode layer 53 sequentially disposed from bottom to top. The substrate 50, the light-emitting layer 52, the second electrode layer 53 and the above-described substrate 30, the light-emitting layer 12, and the second electrode layer 13 have substantially the same structure and arrangement. The first electrode layer 51 includes a plurality of pixel electrodes. Unlike the above embodiments, the reflective layer 10 is omitted from the display device 5 of the present embodiment, but the first electrode layer 51 includes a multi-layer optical and conductive structure, so that the first electrode layer 51 can reflect visible light of a specific wavelength or a specific color and transmit visible light and/or near infrared light of other wavelengths, that is, has the functions of the reflective layer 10 and the first electrode layer 11 of the above embodiments. When the detection module 2 or the image module 4 is applied to the lower part of the display device 5, the detection module 2 or the image module 4 can transmit the display device 5 to receive and/or emit visible light and/or near infrared light, so that biological feature detection, image drawing or imaging of an external object on the light emitting side of the display device 5 is realized.

Referring to fig. 22, a schematic diagram of a modified embodiment of the display device 1 of the present invention shows that the light emitting units 121 of the light emitting layer 12 have the arrangement distribution as shown in the figure. Wherein each rectangular box represents a lighting unit 121, and within the box R represents its corresponding emission of red light (red), G represents its corresponding emission of green light (green), and B represents its corresponding emission of blue light (blue). For convenience of description, the light emitting unit 121 defining the light emitting layer 12 includes a plurality of red light emitting units 1211 emitting red light, green light emitting units 1212 emitting green light, and blue light emitting units 1213 emitting blue light. It should be noted that the arrangement distribution shown in fig. 22 is only for illustration and is not a limitation to the technical solution, and those skilled in the art can understand that the light emitting units 121 may have many different arrangements as required, such as mosaic type, triangular type, honeycomb type, rectangular array type, etc., and the present invention is not limited in particular.

Fig. 23 is a schematic view of a portion of the display device 1 shown in fig. 22 according to the embodiment. The display device 1 shown comprises a substrate 30, a reflective layer 10 arranged on the substrate 30, a first electrode layer 11 arranged on the reflective layer 10, a light emitting layer 12 arranged on the first electrode layer 11 and a second electrode layer 13 arranged on the light emitting layer. The reflective layer 10 includes a plurality of red optical films 1011, green optical films 1012 and blue optical films 1013 arranged in an array. The first electrode layer 11 includes a plurality of pixel electrodes 111 distributed to cover the red optical film 1011, the green optical film 1012, and the blue optical film 1013. The light emitting layer 12 includes a plurality of red light emitting units 1211, green light emitting units 1212, and blue light emitting units 1213 corresponding to the red optical film 1011, the green optical film 1012, and the blue optical film 1013, respectively. The second electrode layer 13 includes a common electrode 131 covering the plurality of red light emitting cells 1211, green light emitting cells 1212, and blue light emitting cells 1213.

In this embodiment or the modified embodiment, the red optical film 1011, the green optical film 1012 and the blue optical film 1013 may be collectively referred to as the optical film 101. The red light-emitting unit 1211, the green light-emitting unit 1212, and the blue light-emitting unit 1213 may be collectively referred to as the light-emitting unit 121.

For convenience of description, in the present disclosure, the red light, the green light, and the blue light may also be referred to as a first wavelength light beam, a second wavelength light beam, and a third wavelength light beam. The red, green, and blue optical films may also be referred to as first, second, and third optical films. The red, green, and blue light emitting units may also be referred to as first, second, and third light emitting units.

The pixel electrode 111 and the common electrode 131 are capable of transmitting the detection light beam, the imaging light beam, and the display light beam. The display light beams include a red light beam emitted from the red light emitting unit 1211, a green light beam emitted from the green light emitting unit 1212, and a blue light beam emitted from the blue light emitting unit 1213. The detection light beam comprises a light beam emitted and/or received by the detection module 2 and used for detecting and identifying the biological characteristics of the external object, and the detection light beam can comprise visible light and/or infrared light. The imaging light beam includes visible light in external ambient light and/or visible light emitted or reflected by an external object.

The red optical film 1011 can be used to reflect red light emitted from the red light emitting unit 1211 and transmit blue light and green light among external ambient light. The green optical film 1012 can be used to reflect green light emitted from the green light emitting unit 1212 and transmit blue light and red light among external ambient light. The blue optical sheet 1013 may be configured to reflect blue light emitted from the blue light emitting unit 1213 and transmit red light and green light in external environment light. It should be noted that the external ambient light or the ambient light mentioned in the specification of the present application mainly refers to visible light. Fig. 24A, fig. 24B and fig. 24C are schematic diagrams of transmittance curves of the red optical film 1011, the green optical film 1012 and the blue optical film 1013, respectively.

Because the pixel unit comprises the optical film 101, the pixel electrode 111 and the light-emitting unit 121 which are arranged in sequence from bottom to top, the visible light emitted by the light-emitting unit 121 of the pixel unit is the visible light emitted by the pixel unit, i.e. the display light beam emitted by the pixel unit.

In other and alternative embodiments of the present invention, the transmittance of the pixel unit for the visible light emitted by the pixel unit and the visible light having the same wavelength or the same color as the visible light emitted by the pixel unit is less than the transmittance of the visible light having the different wavelength or the different color from the visible light emitted by the pixel unit.

In other and alternative embodiments of the present invention, the reflectivity of the pixel unit for the visible light emitted by the pixel unit and the visible light with the same wavelength or the same color as the visible light emitted by the pixel unit is greater than the reflectivity for the visible light with the wavelength or the different color of the visible light emitted by the pixel unit.

In other and alternative embodiments of the present invention, the reflectivity of the pixel unit to the visible light emitted by the pixel unit and the visible light with the same wavelength or color as the visible light emitted by the pixel unit is greater than the transmittance.

In other and alternative embodiments of the present invention, the reflectivity of the pixel unit to the visible light with different wavelengths or different colors from the visible light emitted by the pixel unit is less than the transmittance.

In this embodiment and the modified embodiments, the reflectance of the pixel unit to the visible light with the same wavelength or the same color of the display beam of the visible light emitted by the pixel unit is greater than 50% or more, and the transmittance to the visible light with the different wavelength or the different color of the visible light emitted by the pixel unit is greater than 50%.

The reflectance of the optical film 101 including the red optical film 1011, the green optical film 1012 and the blue optical film 1013 to visible light with the same wavelength or the same color of the display light beam of the visible light emitted by the pixel unit where the optical film is located is greater than 50% or above, and the transmittance to visible light with different wavelength or different color from the visible light emitted by the pixel unit where the optical film is located is greater than 50%. The optical film 101 has a transmittance of infrared light or near-infrared light of 50% or more.

Specifically, the reflectance of the red optical film 1011 to red light with a wavelength of 600nm to 700nm is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%, and the transmittance of the red optical film 1011 to green light, blue light, and infrared light or near-infrared light is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%. The green optical film 1012 has a reflectance of greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90% for green light with a wavelength of 500nm to 600nm, and a transmittance of greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90% for red light, blue light, and infrared light or near-infrared light. The reflectivity of the blue optical film 1013 to blue light with a wavelength of 400nm to 500nm is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%, and the transmittance to red light, green light, and infrared light or near-infrared light is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%. The reflectance is an average reflectance or a central reflectance, and the transmittance is an average transmittance or a central transmittance.

In a modified embodiment, the pixel unit of the display device 1 emits a display light beam of visible light, and the magnitude of the reflectivity of the optical film 101 of the pixel unit to the visible light emitted by the light emitting unit 121 of the pixel unit is two times or more than two times the magnitude of the reflectivity of the optical film 101 to the visible light with different wavelengths or colors from the visible light emitted by the pixel unit. Specifically, the reflectance of the red optical film 1011 for red light is greater than twice the reflectance of the red optical film 1011 for green or blue light. The green optical film 1012 has a reflectance value for green light greater than twice the reflectance of the green optical film 1012 for red or blue light. The reflectance of the blue optical film 1013 to blue light is more than twice the reflectance of the blue optical film 1013 to green light or red light. The reflectivity of the optical film 101 of the pixel unit to the visible light emitted by the light emitting unit 121 of the pixel unit is greater than 50%, the reflectivity is an average reflectivity or a central reflectivity, and the transmittance is an average transmittance or a central transmittance.

In a modified embodiment, the optical film 101 of a pixel unit of the display device 1 has a reflectivity of more than 80% for the display beam of visible light emitted by the light-emitting unit 121 of the pixel unit and a reflectivity of less than 20% for visible light having a different wavelength or color from the display beam of visible light emitted by the pixel unit. The reflectance is an average reflectance or a central reflectance, and the transmittance is an average transmittance or a central transmittance.

Referring to fig. 25, taking the red light-emitting unit 1211, the red optical film 1011 and the corresponding pixel electrode 111 in fig. 22 as an example, the red light-emitting unit 1211 emits red light, and a part of the red light (L1) directly passes through the common electrode 131 and exits to the outside of the display device 1; part of the red light (L2) is transmitted through the pixel electrode 111, reflected by the red optical film 1011, and transmitted through the pixel electrode 111, the red light emitting unit 1211, and the common electrode 131 to the outside of the display device 1. In addition, external ambient light reaches the red optical film 1011 through the common electrode 131, the red light emitting unit 1211, and the pixel electrode 111. A red light portion (L3) of the ambient light is reflected by the red optical film 1011 and passes through the pixel electrode 111, the red light emitting unit 1211 and the common electrode 131 in this order to reach the outside of the display device 1; blue light and green light in the ambient light pass through the red optical film 1011 and further pass through the substrate 30 to reach the detection module 2. Of course, the common electrode 131 also reflects a portion of the red light emitted from the red light emitting unit 1211, and reflects the red light back and forth a plurality of times in the resonant cavity formed between the common electrode 131 and the pixel electrode 111, which will be understood by those skilled in the art and does not affect the implementation of the present invention.

Similarly, blue light and red light in the ambient light can pass through the green optical film 1012 and then pass through the substrate 30 to reach the detection module 2; the green light and the red light in the ambient light can pass through the blue optical film 1013 and then pass through the substrate 30 to reach the detection module 2 or the image module 4.

The detection module 2 or the image module 4 can receive visible light in the ambient light transmitted through the plurality of red optical films 1011, green optical films 1012 and blue optical films 1013 through the substrate 30, and can be used for drawing corresponding two-dimensional or three-dimensional images according to the received visible light, or performing corresponding external object biometric detection or identification, or imaging an external object.

The detection module 2 includes a receiving unit 22 for receiving a detection light beam, and the receiving unit 22 may include an image sensor formed by a plurality of photodiodes, for example, but not limited to, the receiving unit 22 includes a visible light image sensor or an infrared light image sensor. The receiving unit 22 corresponds to a plurality of light emitting units 121 of the display device 1, that is, the receiving unit 22 can receive the ambient light beams transmitted through the plurality of red optical films 1011, green optical films 1012, blue optical films 1013 and panels 30, which together correspond to about two thirds of the total amount of the ambient light beams entering the display device 1, and the ratio of the received red light, green light and blue light and the ratio thereof in the ambient light are substantially the same.

At this time, the ambient light is used as the detection light beam, and the receiving unit 22 of the detection module 2 can collect and receive the ambient light used as the detection light beam, and can detect and identify the two-dimensional or three-dimensional biological features of the external object according to the collected and received ambient light, or draw a two-dimensional or three-dimensional image of the external object.

As shown in fig. 26, the green light emitted from the green light emitting unit 1212 reaches the external object 200 through the common electrode 131 and is reflected, a part of the reflected green light reaches the detection module 2 through the common electrode 131, the red light emitting unit 1211, the pixel electrode 111, the red optical film 1011 and the substrate 30, and a part of the reflected green light reaches the detection module 2 through the common electrode 131, the blue light emitting unit 1213, the pixel electrode 111, the blue optical film 1013 and the substrate 30. It should be noted that fig. 26 only illustrates that the green light emitted by the green light emitting unit 1212 is reflected by the external object 200, and then can pass through other pixel units and be received by the detecting module 2 or the image module 4. In fact, the red light emitted from the red light emitting unit 1211 and the blue light emitted from the blue light emitting unit 1213 can be reflected by the external object 200 and then transmitted to the adjacent or other pixel units to be received by the detecting module 2 or the image module 4.

Therefore, the green light emitted from the green light emitting unit 1212 can be received by the detecting module 2 through the adjacent red light emitting unit 1211 and the corresponding red optical film 1011, blue light emitting unit 1213 and the corresponding blue optical film 1013. The red light emitted from the red light emitting unit 1211 can be received by the detecting module 2 or the image module 4 through the adjacent green light emitting unit 1212 and the corresponding green optical film 1012, blue light emitting unit 1213 and the corresponding blue optical film 1013.

As can be known, the display light beams emitted by the pixel units of the display device 1 can reach the detection module 2 or the image module 4 through other pixel units for emitting display light beams with different colors after being reflected by an external object.

In the embodiment and the modified embodiment of the present invention, the receiving unit 22 can transmit the substrate 30, the optical film 101 (including the red, green and blue optical films 1011, 1012 and 1013), the pixel electrode 111, the light emitting unit 121 (including the red, green and blue light emitting units 1211, 1212 and 1213), and the common electrode 131 to receive the invisible light emitted or reflected by the external object, where the invisible light emitted or reflected by the external object serves as the detection light beam of the detection module 2. Such as but not limited to: the invisible light as the detection beam is infrared light or near-infrared light, for example, near-infrared light having a wavelength of 800nm to 1000nm, or near-infrared light having a wavelength of 940nm, for example.

In this specification, the visible light may be a light beam having a wavelength of about 380nm to 780 nm. The near infrared light may be a light beam having a wavelength between about 800nm and 2000nm, and particularly a light beam having a wavelength between 830nm and 1000nm or a light beam having a wavelength between 900nm and 1000 nm.

In the embodiment and the modified embodiment of the present invention, the emitting unit 21 included in the detection module 2 can penetrate through the substrate 30, the optical film 101 (including red, green and blue optical films 1011, 1012 and 1013), the pixel electrode 111, the emitting unit 121 (including red, green and blue emitting units 1211, 1212 and 1213) and the common electrode 131 emit the detection light beam to the surface or the outside of the display device 1, and the common electrode 131, the emitting unit 121, the pixel electrode 111, the optical film 101 and the substrate 30 reach the receiving unit 22 after being reflected by an external object. The detection light beam is visible light or invisible light.

In the embodiment or the modified embodiment of the present invention, the number of the transmitting units 21 of the detecting 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 a near-infrared light beam and converting it into a corresponding electrical signal. In other or modified embodiments, the receiving unit 22 may be a visible light image sensor, or other types of photoelectric conversion chips.

In the modified embodiment of the present invention, the display device 1 may be an OLED (organic light-emitting diode) display, such as an AMOLED (active-matrix organic light-emitting diode) display. Or the display device 1 includes a Micro-LED display or a Mini-LED display, or other types of self-luminous displays, which is not limited by the present invention.

Referring to fig. 27, a display device 7 is a modified embodiment of the display device 1 of the electronic apparatus 100. The display device 7 includes a substrate 70, a pixel defining layer 71 having an opening (not numbered), a reflective layer (not numbered) including a plurality of optical films 72, a first electrode layer (not numbered) including a plurality of pixel electrodes 73, an insulating layer 75 and a second electrode layer (not numbered) including a common electrode 76, and a light emitting layer (not numbered) including a plurality of light emitting cells 74 disposed between the first electrode layer 73 and the second electrode layer 76 corresponding to the opening of the pixel defining layer 71, which are sequentially disposed from bottom to top. The light emitting unit 74 includes a first electrode 741 connected to the pixel electrode 73 and a second electrode 742 connected to the common electrode 76.

The openings of the pixel defining layer 71 define a plurality of pixel units, each of which includes a light emitting unit 74, a pixel electrode 73, and an optical film 72. The pixel electrode 73 and the common electrode 76 supply current to the light emitting unit 74 through the first electrode 741 and the second electrode 742, respectively. The light emitting unit 74 may emit visible light by the current supplied from the pixel electrode 73 and the common electrode 76. The pixel electrode 73 is capable of transmitting visible light and/or near infrared light emitted from the light emitting unit 74.

The optical film 72 can reflect visible light emitted by the light emitting units 74 belonging to the same pixel unit, and transmit visible light having a different wavelength or color from the visible light emitted by the light emitting units 74 belonging to the same pixel unit of the optical film 72, and the optical film 72 can also transmit infrared light or near infrared light. The display device 7 is thus capable of emitting visible light unilaterally and transmitting infrared light or near-infrared light. In this embodiment, the display device 5 and the pixel unit thereof can emit light from the top.

The inspection module and/or the image module under the substrate 70 can receive visible light and/or near infrared light through the display device 5. For example, but not limited to, the detection module 2 and the image module 4 shown in fig. 19 are disposed below the substrate 70 of the display device 7, and the detection module 2 and the image module 4 can receive visible light and/or near infrared light as a detection beam or an imaging beam through the display device 5, and can be used for mechanical energy biometric detection and/or imaging of an external object located above the display device 5.

In this embodiment, the light emitting unit 74 is a Micro light emitting diode (Micro LED), and the size thereof is smaller than 100 micrometers, or about 1 to 50 micrometers. The first electrode 741 and the second electrode 742 are two electrodes of a light emitting diode. The display device 7 is a Micro-LED display.

In other or modified embodiments of this embodiment, the optical film 72 and the pixel electrode 73 may be made of different materials or formed by an optical layer and an electrode layer; the optical film 72 and the pixel electrode 73 may have a single-layer structure, or a composite layer or a mixed layer having a multi-layer structure. For example, but not limited to, particles having an optical modulation characteristic are doped in the pixel electrode 73 so that the pixel electrode 73 can reflect visible light of a specific wavelength or a specific color and transmit near infrared light while being conductive; or a microstructure having a conductive property, such as a Metal nanowire (Metal nanowire), is added to the optical film 72, so that the optical film 72 can conduct electricity while reflecting visible light of a specific wavelength or a specific color and transmitting near infrared light.

Referring to fig. 28, a display device 9 is a modified embodiment of the display device 1 of the electronic apparatus 100. The display device 9 includes a substrate 90, a pixel defining layer 91 having an opening (not numbered), a reflective layer (not numbered) including a plurality of optical films 92, a pixel electrode layer (not numbered) including a plurality of first pixel electrodes 931 and second pixel electrodes 932, and a light emitting layer (not numbered) including a plurality of light emitting units 94 disposed corresponding to the openings of the pixel defining layer 91, which are sequentially disposed from bottom to top. The light emitting unit 94 includes a first electrode 941 connected to the first pixel electrode 931 and a second electrode 942 connected to the second pixel electrode 932.

The opening of the pixel defining layer 91 defines a plurality of pixel units, each of which includes a light emitting unit 94, a first pixel electrode 931, a second pixel electrode 932, and an optical film 92. The first and second pixel electrodes 931 and 932 provide current to the light emitting unit 94 through the first and second electrodes 941 and 942, respectively. The light emitting unit 94 may emit visible light by the current. The first and second pixel electrodes 931 and 932 can transmit visible light and/or near infrared light emitted from the light emitting unit 94.

The optical film 92 can reflect visible light emitted by the light emitting units 94 belonging to the same pixel unit, and transmit visible light having a different wavelength or a different color from the visible light emitted by the light emitting units 94 belonging to the same pixel unit of the optical film 92, and the optical film 92 can also transmit near-infrared light. The display device 9 is thus capable of emitting visible light unilaterally and transmitting infrared light or near-infrared light. In this embodiment, the display device 7 and the pixel unit thereof can emit light from the top.

The detection module and/or the image module located below the substrate 90 can receive visible light and/or near infrared light through the display device 9. For example, but not limited to, the detection module 2 and the image module 4 shown in fig. 19 are disposed below the substrate 90 of the display device 9, and the detection module 2 and the image module 4 can receive visible light and/or near infrared light as a detection beam or an imaging beam through the display device 9, and can be used for mechanical energy biometric detection and/or imaging of an external object located above the display device 7.

In this embodiment, the light emitting unit 94 is a Micro light emitting diode (Micro LED), and the size thereof is about 100 micrometers, or about 1 to 50 micrometers. The first electrode 941 and the second electrode 942 are two electrodes of a light emitting diode. The display device 9 is a Micro-LED display.

In another or modified embodiment of this embodiment, the light emitting unit 94 may be a small light emitting diode (Mini LED), and the display device 9 may be a Mini-LED display.

In other or modified embodiments of this embodiment, the optical film 92, the first pixel electrode 931 and the second pixel electrode 932 may be optical layers and electrode layers formed by different materials or processes; the optical film 92, the first pixel electrode 931 and the second pixel electrode 932 may have a single-layer structure, or a composite layer or a mixed layer having a multi-layer structure. For example, but not limited to, particles having an optical modulation characteristic are doped in the first and second pixel electrodes 931 and 932 so that the pixel electrode 93 can reflect a specific wavelength or a specific color of visible light and transmit near infrared light while being conductive; or a microstructure having a conductive property, such as a Metal nanowire (Metal nanowire), is added to the optical film 92, so that the optical film 92 can conduct electricity while reflecting visible light of a specific wavelength or a specific color and transmitting near infrared light. The utility model discloses in the above-mentioned or change embodiment, the position that detects module 2 and set up corresponds in the middle of display device 1's the bottom, perhaps detect module 2 and can also have different position settings, the utility model discloses do not do the restriction.

An embodiment of the utility model provides a biological characteristic detection method for biological characteristic under the screen detects and discerns, include:

providing a display device 1, wherein the display device 1 comprises a plurality of pixel units for emitting display light beams of visible light with different wavelengths or different colors, and the pixel units can simultaneously emit the display light beams and transmit detection light beams;

providing a detection module 2 at least partially arranged below the display device, wherein the detection module 2 receives and/or emits a detection light beam through the pixel unit;

and converting the received detection light beam into a digital signal to obtain two-dimensional or three-dimensional biological characteristic information or an image of the external object.

The detection light beam comprises a display light beam emitted by the pixel unit, which is reflected by an external object and then reaches the detection module through other pixel units emitting display light beams with different wavelengths or different colors; ambient light beams emitted or reflected by an external object pass through the pixel unit to reach the detection module; invisible light emitted or reflected by an external object passes through the pixel unit to reach the detection module; or the invisible light emitted by the detection module penetrates through the pixel unit and reaches the detection module after being reflected by an external object.

The utility model discloses in the above-mentioned or change embodiment, electronic equipment can be the cell-phone, 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 equipment that can be used for object biological characteristic to detect and discern.

Referring to fig. 29, the present invention further provides a method for manufacturing an electronic device, where the electronic device has an under-screen biometric detection function, the method includes:

step S1, providing a substrate 30;

step S2 of forming a reflective layer 10 including a plurality of optical films 101 by photolithography on the substrate 30;

step S3, forming a first electrode layer 11 including a plurality of pixel electrodes 111 on the substrate 30 and the reflective layer 10 by photolithography;

a step S4 of vapor-depositing a light-emitting layer 12 including a plurality of light-emitting cells 121 on the first electrode layer 11;

a step S5 of vapor-depositing a second electrode layer 13 including a common electrode 131 on the light-emitting layer 12;

in step S6, the inspection module 2 and/or the image module 4 are disposed under the substrate 30. Wherein, the detection module 2 can receive and/or emit detection light beams through the substrate 30, the reflective layer 10, the first electrode layer 11, the light emitting layer 12 and the second electrode layer 13 and is used for detecting and identifying the biological characteristics of the external object, or used for two-dimensional and/or three-dimensional image drawing of the external object, or used for detecting the space coordinates of the external object. The image module 4 can transmit and/or receive visible light through the substrate 30, the reflective layer 10, the first electrode layer 11, the light emitting layer 12 and the second electrode layer 13 and is used for imaging an external object, such as photographing or video.

Compared with the prior art, the utility model discloses display device, electronic equipment and detection module, electron manufacturing method and biological characteristic detection method can see through display device's pixel unit receives and/or transmits measuring beam, and not see through from the clearance of pixel unit, because the most area of pixel unit having occupied display device's display area, consequently the transmissivity that is used for the measuring beam of outside object biological characteristic detection and discernment is great, and biological characteristic detection efficiency is higher, and user experience is better.

In fact, when near-infrared light or visible light is used as the detection light beam, in the display device and the electronic device adopting the AMOLED display screen in the prior art, the transmittance of the whole display device for the near-infrared light or visible light reflected by the external object is only 5% by using the pixel cell gap, that is, the receiving unit located below the AMOLED display screen in the prior art can only receive 5% of the near-infrared light or visible light reflected by the external object. And the utility model discloses a pixel unit sees through near-infrared light, the utility model discloses a display device 1 and electronic equipment etc. can reach 30% ~ 50% to the whole transmissivity of the near-infrared light or the visible light of external object reflection. Additionally, the embodiment of the utility model provides an in can use visible light and/or invisible light as detecting beam simultaneously, further improvement biological characteristic detects safety and efficiency.

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 (33)

1. The display device is characterized by comprising at least one of red, green and blue pixel units, wherein each pixel unit comprises a light-emitting unit and an optical film positioned on one side of the light-emitting unit, the light-emitting unit is used for emitting single-color visible light, the light-emitting side of the display device is defined as a light-emitting side, and the optical film is used for reflecting the single-color visible light emitted by the light-emitting unit to the light-emitting side and transmitting visible light and/or near infrared light with different colors from the emitted color while emitting the single-color visible light to the light-emitting side of the light-emitting unit of the sub-pixel with the same color.

2. The display device according to claim 1, wherein the display device is capable of emitting light on one side and displaying an image, and the display device comprises an optical film having an average reflectance of more than 30% and an average transmittance of less than 70% for visible light having a wavelength of 380nm to 700nm, and having an average transmittance of more than 80% for near-infrared light having a wavelength of 830nm to 1000 nm.

3. The display device according to claim 1, wherein the near-infrared light is a light beam having a wavelength of 830nm to 1000 nm.

4. The display device according to claim 1, wherein the near-infrared light is a light beam having a wavelength of 900nm to 1000 nm.

5. The display device according to claim 1, wherein the average reflectance of the pixel unit for the visible light emitted therefrom or the visible light having the same wavelength or the same color as the wavelength or the color of the visible light emitted therefrom is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%, and the average transmittance of the pixel unit for the visible light having the different wavelength or the different color from the wavelength or the color of the visible light emitted therefrom is greater than 50%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%.

6. The display device according to claim 1, wherein the pixel unit has a reflectance for visible light emitted therefrom and visible light having the same wavelength or color as that of the visible light emitted therefrom that is greater than a reflectance for visible light having a different wavelength or color from that of the visible light emitted therefrom.

7. The display device according to claim 1, wherein the transmittance of the pixel unit for visible light emitted therefrom and visible light having the same wavelength or the same color as that of the visible light emitted therefrom is smaller than the transmittance for visible light having a different wavelength or a different color from that of the visible light emitted therefrom.

8. The display device according to claim 1, wherein the pixel unit has a reflectance greater than a transmittance for the visible light emitted therefrom and the visible light having the same wavelength or the same color as the visible light emitted therefrom.

9. The display device according to claim 1, wherein the pixel unit has a reflectance smaller than a transmittance for visible light having a wavelength or a color different from that of the visible light emitted therefrom.

10. The display device of claim 1, wherein the pixel cell is capable of emitting one or more of red, green, or blue light at the top, the bottom of the pixel cell has a center reflectivity for red light that is greater than twice the center reflectivity for green or blue light, or the pixel cell has a center reflectivity for green light that is greater than twice the center reflectivity for blue or red light, or the pixel cell has a center reflectivity for blue light that is greater than twice the center reflectivity for green or red light.

11. The display device of claim 1, wherein the pixel cells are capable of emitting at the top and reflecting at the bottom one or more of red, green, or blue light, wherein a red light emitting pixel cell has a transmittance of greater than 80% and a reflectance of less than 20% for blue and green light; the pixel unit emitting green light has transmittance of more than 80% and reflectance of less than 20% for blue light and red light; the pixel unit emitting blue light has transmittance of more than 80% and reflectance of less than 20% for red light and green light.

12. The display device according to claim 1, wherein the pixel unit comprises a pixel electrode, a light emitting unit disposed on the pixel electrode, the light emitting unit being operable to emit visible light, and the pixel electrode being operable to reflect visible light emitted by the light emitting unit and visible light having the same wavelength or the same color as the visible light emitted by the light emitting unit and transmit visible light having a different wavelength or a different color from the visible light emitted by the light emitting unit.

13. The display device according to claim 1, wherein the pixel unit comprises an optical film, a pixel electrode and a light emitting unit, which are sequentially arranged from bottom to top, the light emitting unit can be used for emitting visible light, the optical film can be used for reflecting the visible light emitted by the light emitting unit and the visible light with the same wavelength or the same color as the visible light emitted by the light emitting unit and transmitting the visible light with the different wavelength or different color from the visible light emitted by the light emitting unit, and the pixel electrode can transmit the visible light emitted by the light emitting unit.

14. The display device according to claim 13, wherein the optical film has an average reflectance of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for a light beam of a specific wavelength or a specific color, and an average transmittance of more than 50%, or more than 60%, or more than 70%, or more than 80%, or more than 90% for a light beam of another wavelength or another color.

15. A display device according to claim 12 or 13, wherein a common electrode is further provided on the light-emitting unit, and the common electrode and the pixel electrode are used together to supply a current required for light emission to the light-emitting unit.

16. The display device according to claim 13, wherein the display device further comprises a substrate disposed below the optical film, wherein a detection module at least partially located below the substrate is capable of receiving and/or emitting a detection beam through the display device, wherein the detection beam is capable of being used for detecting biometric information of an external object, or for mapping an image of an external object, or for imaging an external object.

17. The display device of claim 1, wherein the display device comprises one of an AMOLED display, a Micro-LED display, a Mini-LED display.

18. The display device according to claim 13, wherein the optical film comprises a plurality of dielectric films alternately arranged in a high refractive index and a low refractive index.

19. The display device according to claim 18, wherein the thickness of the multi-layer dielectric film is λ/4, where λ represents a central wavelength of a light beam reflected by the optical film in air.

20. The display device according to claim 13, wherein when the light emitting unit emits red light, the optical film located below the light emitting unit has a reflectance of red light more than twice as high as a reflectance of green light and blue light; when the light emitting unit emits green light, the optical film located below the light emitting unit has a reflectance for the green light more than twice as high as a reflectance for the red light and the blue light; when the light emitting unit emits blue light, the optical film located under the light emitting unit has a reflectance to the blue light more than twice as high as a reflectance to the red light and the green light.

21. The display device according to claim 18, wherein the optical film comprises a plurality of dielectric films having different thicknesses to reflect light beams in a certain wavelength range.

22. The display device according to claim 21, wherein the thicknesses of the dielectric films sequentially increase or sequentially decrease.

23. The display device according to claim 13, wherein the optical film of the pixel unit has an area larger than that of the corresponding light emitting unit and does not overlap with the optical films of other pixel units; or the projection of the optical film of the pixel unit in the vertical direction covers the corresponding light-emitting unit and does not overlap with the optical films of other pixel units.

24. An electronic device, comprising a display device and a detection module or an image module disposed below the display device, wherein the detection module can transmit and/or receive a detection light beam or an imaging light beam through the display device and is used for external object biometric detection, image drawing, or external object imaging, and the display device is the display device according to any one of claims 1 to 23.

25. The electronic device of claim 24, wherein the image module comprises one or more visible light image sensors capable of receiving, through the pixel unit, an imaging light beam emitted or reflected by an external object at the same time or in a time-sharing manner, the visible light image sensors are disposed below or at the back of the display device, the imaging light beam comprises visible light, and the imaging light beam received by the visible light image sensors at the same time or in the time-sharing manner can be used for imaging the external object at a single time.

26. The electronic device according to claim 24, wherein the detection module comprises one or more receiving units capable of receiving, through the pixel unit, simultaneously or time-divisionally, a detection light beam emitted or reflected by an external object, the receiving unit is disposed below or on a back surface of the display device, the detection light beam comprises visible light and/or infrared light, and the one or more receiving units are capable of receiving, simultaneously or time-divisionally, the detection light beam for a single detection of a biometric feature of the external object or for a single imaging of the external object.

27. The electronic device according to claim 26, wherein the detection module further comprises an emitting unit disposed below the display device or in a non-display area, the emitting unit being capable of emitting a detection beam through the display device to the surface or outside of the display device, and the detection beam being capable of being reflected by an external object and reaching the receiving unit through the display device.

28. The electronic device of claim 27, wherein the emitting unit comprises a light emitting array and/or a diffractive optical element, the light emitting array comprises a plurality of light emitting chips arranged in a two-dimensional pattern, the diffractive optical element is disposed on the light emitting array, and the diffractive optical element can split and copy the light beam emitted by the light emitting array and project the light beam to a space.

29. The electronic device of claim 28, wherein the detection beam comprises visible light and/or infrared light or near-infrared light, and the detection module is capable of detecting and recognizing a two-dimensional or three-dimensional biometric feature of the external object or rendering a two-dimensional or three-dimensional image or image of the external object based on the detection beam; the imaging light beam comprises visible light, and the image module can photograph or video an external object according to the imaging light beam.

30. The electronic device of claim 24, wherein the detection module is configured to detect and identify a biometric characteristic of an external object, the biometric characteristic of the external object including one or more of a fingerprint, a facial feature, an iris, a vascular structure, a heartbeat, a body temperature, a gesture, and an expression.

31. A detection module, characterized in that the detection module is the detection module included in the electronic device according to any one of claims 24 to 30.

32. An image module according to any one of claims 24 to 30, wherein the image module is an image module included in an electronic device.

33. An electronic device, comprising the display device according to any one of claims 1 to 23, the detection module according to claim 31, or the image module according to claim 32.

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