CN113934039A - Display device - Google Patents
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- CN113934039A CN113934039A CN202111269027.7A CN202111269027A CN113934039A CN 113934039 A CN113934039 A CN 113934039A CN 202111269027 A CN202111269027 A CN 202111269027A CN 113934039 A CN113934039 A CN 113934039A
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- lens
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- display panel
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present application provides a display device; the display device has an optical sensing area, and includes: the display panel, set up in the lens layer of the side of being shaded of display panel and set up in the sensitization component of keeping away from display panel one side on lens layer, the lens layer is including the lens subassembly that sets up corresponding to the optical sensing district, and the lens subassembly includes that a plurality of arrays are arranged, sub-wavelength size's microlens, and sensitization component corresponds the setting with the optical sensing district. This application is through setting up the lens subassembly that contains the microlens that a plurality of arrays arranged, subwavelength size, utilizes this lens subassembly to assemble light to light sensing element, has reduced the thickness on lens layer among the display device, is favorable to realizing display device's frivolousization design.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
With the pursuit of consumers for high-screen-ratio mobile phones, full-screen has become a trend of mobile phone development. The technology of fingerprint identification under the screen and the technology of camera under the screen are widely concerned by people because the technology does not occupy the area of a normal display opening area. For the under-screen fingerprint identification technology, after infrared light is emitted by an external infrared light source, light rays are transmitted to fingerprints and reflected to an under-screen lens, and then are collected to a fingerprint identification sensor by the under-screen lens, so that fingerprint identification is realized; for the camera technology under the screen, the region between the pixels in the display screen can be designed into a transparent state, and external natural light can penetrate through the display screen to reach the lens under the screen and then be converged to the camera sensor by the lens under the screen, so that imaging is realized. At present, the size of the under-screen lens adopted by the under-screen fingerprint identification technology and the under-screen camera technology is large, and the assembly structure is complex, so that the overall thickness of the mobile phone is too large, and the light and thin design and the full-screen design of the mobile phone are not facilitated to be realized.
Therefore, the current technology of fingerprint identification under the screen and the technology of camera under the screen have the technical problem that the size of the lens under the screen is overlarge.
Disclosure of Invention
The application provides a display device for alleviate the too big technical problem of lens size under the screen that present fingerprint identification technology and camera technique exist under the screen.
The present application provides a display device having an optical sensing region, the display device comprising:
a display panel having a light exit side and a backlight side opposite the light exit side;
the lens layer is arranged on the backlight side of the display panel and comprises a lens component arranged corresponding to the optical sensing area, and the lens component comprises a plurality of micro lenses which are arranged in an array and have sub-wavelength sizes;
and the photosensitive element is arranged on one side of the lens layer, which is far away from the display panel, and is arranged corresponding to the optical sensing area.
In the display device of the present application, the orthographic projection of the photosensitive element on the lens layer is located within the range of the lens assembly.
In the display device of the present application, the display panel includes a first substrate on a backlight side thereof, and the lens layer further includes a first protective layer;
the lens assembly is connected with one side surface of the first substrate facing the lens layer, and the first protective layer is arranged along the first substrate and covers the lens assembly.
In the display device of the application, the lens layer further comprises a second substrate and a first protective layer, the lens assembly is arranged on one side surface of the second substrate, and the first protective layer is arranged along the second substrate and covers the lens assembly;
and the surface of one side of the second substrate, which is opposite to the side provided with the lens component, is connected with the display panel.
In the display device of the application, the lens layer further comprises a second substrate and a second protective layer, the lens assembly is arranged on one side surface of the second substrate, and the second protective layer is arranged along the second substrate and covers the lens assembly;
and the surface of one side of the second protective layer, which is far away from the second substrate, is connected with the display panel.
In the display device of the present application, the lens layer further includes a second substrate, and a first protective layer and a second protective layer disposed along opposite sides of the second substrate, and the lens assemblies are disposed on opposite sides of the second substrate and covered by the first protective layer and the second protective layer, respectively;
and the surface of one side of the second protective layer, which is far away from the second substrate, is connected with the display panel.
In the display device of the application, the optical sensing area comprises a camera shooting area and a fingerprint identification area, and the photosensitive element comprises a first sensor arranged corresponding to the camera shooting area and a second sensor arranged corresponding to the fingerprint identification area;
the lens assembly comprises a first lens assembly arranged corresponding to the first sensor and a second lens assembly arranged corresponding to the second sensor.
In the display device of the present application, the first lens assembly includes a plurality of first microlenses arranged in an array and having a subwavelength size, the first microlenses allowing natural light to pass therethrough;
the second lens component comprises a plurality of second micro lenses which are arranged in an array and have sub-wavelength sizes, and the second micro lenses allow infrared light to penetrate through.
In the display device of the present application, the material for manufacturing the first microlens includes at least one of titanium oxide, gallium phosphide and silicon nitride, and the material for manufacturing the second microlens includes silicon.
In the display device of the application, the size range of the micro lens is 100 nanometers to 1000 nanometers, and the shape of the micro lens comprises a cuboid, a cube, a cylinder and a V-shaped body.
The beneficial effect of this application is: the present application provides a display device having an optical sensing area, the display device comprising: display panel, set up in the lens layer of display panel's the side of being shaded and set up in keeping away from on the lens layer the sensitization component of display panel one side, the lens layer including corresponding to the lens subassembly that the optical sensing district set up, the lens subassembly includes that a plurality of arrays arrange, sub-wavelength size's microlens, the sensitization component with the optical sensing district corresponds the setting, and this application contains the lens subassembly of a plurality of arrays arrangement, sub-wavelength size's microlens through setting up, utilizes this lens subassembly to assemble light to the sensitization component, has reduced the thickness on lens layer among the display device, is favorable to realizing display device's frivolous design.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic view of a first structure of a display device according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of a second structure of a display device according to an embodiment of the present application.
Fig. 3 is a schematic cross-sectional view of the display device shown in fig. 1.
Fig. 4 is a schematic structural diagram of a lens assembly provided in an embodiment of the present application.
Fig. 5 is a schematic diagram of a dimensional period of a microlens provided in an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a microlens provided in an embodiment of the present application.
Fig. 7 is a schematic diagram illustrating the light converging effect of the lens assembly provided in this embodiment.
Fig. 8 is a first view of a first microlens provided in an embodiment of the present application.
Fig. 9 is a second view of a first microlens provided in an embodiment of the present application.
Fig. 10 is a first view of a second microlens provided in an embodiment of the present application.
Fig. 11 is a second view of a second microlens provided in the embodiments of the present application.
Fig. 12 is a schematic cross-sectional view of the display device shown in fig. 1.
Fig. 13 is a schematic view of a third cross-sectional structure of the display device shown in fig. 1.
Fig. 14 is a schematic view of a fourth cross-sectional structure of the display device shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a display device, display device has optical induction zone, display device includes: the display panel, set up in the lens layer of the display panel's side of being shaded, and set up in the lens layer keep away from the sensitization component of display panel one side, the lens layer includes the lens subassembly that corresponds to the setting of optical sensing district, the lens subassembly includes that a plurality of arrays are arranged, the microlens of subwavelength size, sensitization component with the optical sensing district corresponds the setting. The lens assembly of the microlens that this application embodiment was arranged, sub-wavelength dimension through setting up to contain a plurality of arrays utilizes this lens assembly to assemble light to light sensing element, has reduced the thickness of the lens layer among the display device, is favorable to realizing display device's frivolous design.
The structural features and functional features of the display device provided in the embodiments of the present application are described below with reference to the accompanying drawings.
In an embodiment, please refer to fig. 1, wherein fig. 1 is a first structural diagram of a display device according to an embodiment of the present disclosure. The display device is provided with an optical sensing area which comprises a camera shooting area A1 and a fingerprint identification area A2, wherein the camera shooting area A1 and the fingerprint identification area A2 both occupy partial areas of a display surface of the display device. A camera module corresponding to the light emitting direction of the display device is arranged in the camera area a1 and is used for performing operations such as front-end shooting; and a fingerprint identification component corresponding to the light emitting direction of the display device is arranged in the fingerprint identification area A2 and is used for fingerprint identification operation. The camera area a1 may be a circular or oval area, and the fingerprint identification area a2 may be a square, circular or oval area.
In another embodiment, please refer to fig. 2, wherein fig. 2 is a second structural diagram of the display device according to the embodiment of the present disclosure. The display device is provided with an optical sensing area, wherein the optical sensing area comprises a camera shooting area A1 and a fingerprint identification area A2, and the camera shooting area A1 occupies a local area of the display surface of the display device, and can be a circular or oval area; the fingerprint identification area a2 occupies the entire area of the display surface of the display device except for the imaging area a 1. A camera shooting component corresponding to the light emitting direction of the display device is arranged in the camera shooting area A1 and is used for carrying out operations such as front-end shooting; and a fingerprint identification component corresponding to the light emitting direction of the display device is arranged in the fingerprint identification area A2 and used for carrying out fingerprint identification operation and realizing full-screen fingerprint identification.
It is to be understood that the embodiment shown in fig. 1 is different from the embodiment shown in fig. 2 only in the arrangement range of the fingerprint recognition area a2, and the same or similar to the structure of the entire display device. The structural features of the display device provided by the present application are further described below with respect to the embodiment shown in fig. 1.
In an embodiment, referring to fig. 3, fig. 3 is a first cross-sectional structural diagram of the display device shown in fig. 1, wherein, in order to clearly illustrate the film layer structures of the image capturing area a1 and the fingerprint identification area a2, the cross-sectional diagram shown in fig. 3 is obtained by cutting a cross-sectional view of the display device shown in fig. 1, which can simultaneously cut into the image capturing area a1 and the fingerprint identification area a 2.
The display device comprises a display panel 10, wherein the display panel 10 is provided with a light-emitting side and a backlight side opposite to the light-emitting side, and the light-emitting side is one side of a display picture of the display panel 10. The display device further includes: the display panel comprises a lens layer 20 arranged on the backlight side of the display panel 10, a glass cover plate 40 arranged on the light-emitting side of the display panel 10, and a photosensitive element 30 arranged on the side, far away from the display panel 10, of the lens layer 20.
The display panel 10 is a component having a display function in the display device, and may be an organic light emitting diode display, a micro light emitting diode display, a liquid crystal display, or the like. The lens assembly 201 is disposed in the lens layer 20 and corresponds to the optical sensing area, and the lens assembly 201 is used for converging light rays onto the photosensitive element 30 along a certain angle. The photosensitive element 30 is arranged corresponding to the optical sensing area, and the orthographic projection of the photosensitive element 30 on the lens layer 20 is located within the range of the lens assembly 201, so that at least part of the light rays passing through the lens assembly 201 irradiate on the photosensitive element 30; the light sensing member 30 may include various optical sensors such as a camera sensor, a fingerprint recognition sensor, a face recognition sensor, a distance measurement sensor, etc. for performing a specific function by receiving a light signal.
Referring to fig. 4 to 6, fig. 4 is a schematic structural diagram of a lens assembly according to an embodiment of the present disclosure, fig. 5 is a schematic dimensional cycle diagram of a microlens according to an embodiment of the present disclosure, and fig. 6 is a schematic structural diagram of a microlens according to an embodiment of the present disclosure. The lens assembly 201 includes a plurality of sub-wavelength-sized microlenses LE arranged in an array; wherein, the "sub-wavelength size" means that the characteristic size of the micro lens LE is equal to or smaller than the wavelength of the light that the micro lens LE allows to transmit; for a microlens having a rectangular parallelepiped shape, the characteristic dimensions refer to the length, width, and height of the rectangular parallelepiped, for a microlens having a cylindrical shape, the characteristic dimensions refer to the diameter and height of the cylinder, and so on.
In the lens assembly 201, a plurality of microlenses LE are arranged in an array, and the light converging effect of the lens assembly 201 is realized by adjusting a certain angle and size. In the array of the microlenses LE, the microlenses LE have a distribution period S, which can be used to characterize the distance between adjacent microlenses LE or the feature space occupied by each microlens LE, for defining the size range of the microlenses LE. For a distribution period S, which presents a first dimension S1 and a second dimension S2, the microlenses LE present a tilt angle α within the distribution period S; in the present embodiment, the first dimension S1, the second dimension S2, and the inclination angle α have the following dimensional characteristics: the first dimension S1 and the second dimension S2 range from 100 nanometers to 4000 nanometers, and the tilt angle α ranges from 0 degrees to 360 degrees.
Further, when the microlens LE has a rectangular parallelepiped shape, the length L, the width W, and the height H thereof range from 100 nm to 1000 nm.
Referring to fig. 7, fig. 7 is a schematic view illustrating a light converging effect of the lens assembly provided in this embodiment, after the light R is emitted to the lens assembly 201, the light R is refracted by the lens assembly 201 and emitted toward the focal point F, so as to realize a function of converging light of the lens assembly 201; since the photosensitive element 30 is used for receiving the light refracted by the lens assembly 201, the photosensitive element 30 is disposed near the focal point F.
With continued reference to fig. 1 and 3, the optical sensing area includes a camera area a1 and a fingerprint recognition area a2, and the photosensitive element 30 includes a first sensor 30a corresponding to the camera area a1 and a second sensor 30b corresponding to the fingerprint recognition area a 2; the lens assembly 201 includes a first lens assembly 201a disposed corresponding to the first sensor 30a and a second lens assembly 201b disposed corresponding to the second sensor 30 b. The first sensor 30a is used for capturing images, and the second sensor 30b is used for fingerprint identification.
The first lens assembly 201a comprises a plurality of first microlenses arranged in an array and having a sub-wavelength size, wherein the first microlenses allow natural light to pass through; the second lens assembly 201b includes a plurality of second microlenses arranged in an array and having a sub-wavelength size, and the second microlenses allow infrared light to pass through. Optionally, the material for manufacturing the first microlens includes at least one of titanium oxide, gallium phosphide and silicon nitride, and the material for manufacturing the second microlens includes silicon. When the second micro lens is made of silicon, the second lens assembly 201b can only allow infrared light to penetrate through, so that an additional filtering structure is not needed, the structural complexity is reduced, and the signal-to-noise ratio during fingerprint identification is improved.
Alternatively, please refer to fig. 8 to 11, fig. 8 is a first view of a first microlens provided in the embodiment of the present application, fig. 9 is a second view of a first microlens provided in the embodiment of the present application, fig. 10 is a first view of a second microlens provided in the embodiment of the present application, and fig. 11 is a second view of a second microlens provided in the embodiment of the present application. In this embodiment, the first microlenses LE1 have a cylindrical shape, and are distributed in the corresponding distribution period S, and the corresponding diameters and heights of the first microlenses LE1 range from 100 nm to 1000 nm; the second microlenses LE2 have a rectangular parallelepiped shape, and they are distributed in the corresponding distribution period S, and their corresponding length, width, and height ranges from 100 nm to 1000 nm.
Optionally, the shape of the first microlens LE1 may also be a cuboid, a cube, a V-shaped body, etc., when the shape of the first microlens LE1 is a cuboid, it is preferably in the height range of 300 nm to 700 nm, preferably in the width and length range of 30 nm to 700 nm, and the first directional size S1 and the second directional size S2 corresponding to the preferred sizes are in the range of 100 nm to 2000 nm; through creative design and experiments, under the preferable condition, the first lens assembly 201a has better conduction and convergence effects on natural light. The shape of the second microlens LE2 may also be a cube, a cylinder, a V-shaped body, etc., and when the shape of the second microlens LE2 is a cuboid, it preferably has a length, a width, and a height in the range of 100 nm to 1000 nm, and the first dimension S1 and the second dimension S2 corresponding to the preferred dimensions have a value in the range of 100 nm to 4000 nm.
Referring to fig. 3, the display panel 10 includes a first substrate on a backlight side thereof and a plurality of components for implementing a display function thereof on the first substrate. When the display panel is an organic light emitting diode display panel, the first substrate may be provided with: the light emitting diode comprises a driving circuit layer containing various wiring and light opening elements, a light emitting layer which is positioned on the driving circuit layer and contains a plurality of organic light emitting diodes, and a film layer which is positioned on the light emitting layer and is used for realizing functions of touch control, polarization and the like; when the display panel is a liquid crystal display panel, the first substrate may be provided with: the backlight module comprises a backlight layer, a driving circuit layer which is positioned on the backlight layer and comprises various routing and light opening elements, a liquid crystal layer positioned on the driving circuit layer, a color film layer positioned on the liquid crystal layer and the like.
The lens layer 20 is connected to the first substrate, the lens layer 20 further includes a first protection layer 202, the lens assembly 201 is connected to a surface of the first substrate facing the lens layer 20, and the first protection layer 202 is disposed along the first substrate and covers the lens assembly 201. The first protective layer 202 is a transparent protective layer for sealing and protecting the lens assembly 201, and preventing the lens assembly 201 from being worn during assembly and use. Alternatively, the lens assembly 201 may be separately fabricated and then attached to the first substrate; the lens assembly 201 may also be directly fabricated on the surface of the first substrate, and then the first protection layer 202 covering the lens assembly 201 is fabricated, wherein the method for fabricating the lens assembly 201 may be ultraviolet lithography, nano-imprinting, electron beam exposure, laser direct writing, and the like.
The photosensitive element 30 is disposed on a side of the lens layer 20 away from the display panel 10, and is connected to the first protection layer 202, the photosensitive element 30 receives light transmitted through the lens assembly 201 to implement its corresponding function, for example, the first sensor 30a receives external natural light transmitted through the first lens assembly 201a to complete image capture; the second sensor 30b receives the reflected infrared fingerprint light transmitted by the second lens assembly 201b, thereby completing fingerprint information recognition.
It can be understood that the display device provided by the embodiment of the present application, by setting the lens assembly including the plurality of array arrangement sub-wavelength micro lenses, and using the lens assembly to converge light to the photosensitive element, compared with the conventionally set under-screen lens, the lens assembly has a smaller size, the thickness of the lens layer in the display device is reduced, which is beneficial to realizing the light and thin design of the display device, and the lens assembly is integrally manufactured in the display device, and has higher compatibility with the manufacturing process of the display device, the process complexity of manufacturing the lens structure in the display device is reduced, in addition, the adjustment of the optical path can be realized by changing the parameter characteristics of the micro lenses in the lens assembly, and the flexibility is higher.
Regarding the structural features of the lens layer 20 in the display device provided in the embodiments of the present application, the following embodiments of the present application provide other possible structural designs of the lens layer 20, not only the descriptions of the above embodiments; it is to be understood that the display device described in the following embodiments has the same or similar structural features as the display device described in the above embodiments, and reference is made to the description of the above embodiments where nothing is detailed.
In an embodiment, please refer to fig. 1 and 12, fig. 12 is a second cross-sectional structural diagram of the display device shown in fig. 1, and the display device includes a display panel 10, a lens layer 20 disposed on a backlight side of the display panel 10, a glass cover plate 40 disposed on a light-emitting side of the display panel 10, and a photosensitive element 30 disposed on a side of the lens layer 20 away from the display panel 10. The lens assembly 201 corresponding to the optical sensing area is arranged in the lens layer 20, and the lens assembly 201 includes a plurality of microlenses arranged in an array and having a sub-wavelength size. The photosensitive element 30 is disposed corresponding to the optical sensing area, and an orthographic projection of the photosensitive element 30 on the lens layer 20 is located within a range of the lens assembly 201.
The optical sensing area comprises a camera shooting area A1 and a fingerprint identification area A2, and the photosensitive element 30 comprises a first sensor 30a arranged corresponding to the camera shooting area A1 and a second sensor 30b arranged corresponding to the fingerprint identification area A2; the lens assembly 201 comprises a first lens assembly 201a arranged corresponding to the first sensor 30a and a second lens assembly 201b arranged corresponding to the second sensor 30b, the first sensor 30a is used for image shooting, and the second sensor 30b is used for fingerprint identification. The first lens assembly 201a comprises a plurality of first microlenses arranged in an array and having a sub-wavelength size, wherein the first microlenses allow natural light to pass through; the second lens assembly 201b includes a plurality of second microlenses arranged in an array and having a sub-wavelength size, and the second microlenses allow infrared light to pass through.
The lens layer 20 is connected to the backlight side of the display panel 10, the lens layer 20 further includes a second substrate 203 and a first protective layer 202, the lens assembly 201 is disposed on a side surface of the second substrate 203, the first protective layer 202 is disposed along the second substrate 203 and covers the lens assembly 201, and a side surface of the second substrate 203 opposite to the side where the lens assembly 201 is disposed is connected to the display panel 10. The lens assembly 201 may be connected to the display panel 10 after the second substrate 203 is manufactured, and the method for manufacturing the lens assembly 201 may be ultraviolet lithography, nano-imprinting, electron beam exposure, laser direct writing, or the like. The photosensitive element 30 is disposed on a side of the lens layer 20 away from the display panel 10, and is connected to the first protection layer 202, and the photosensitive element 30 receives the light transmitted through the lens assembly 201 to implement its corresponding function.
In this embodiment, the first lens assembly 201a and the second lens assembly 201b are both disposed on one side of the second substrate 203 facing the photosensitive element 30, the distance between the photosensitive element 30 and the lens assembly 201 is relatively small, and more parts of the light emitted to the photosensitive element 30 are transmitted through the lens assembly 201, so that interference of a part of abnormal light can be reduced, and the identification efficiency of the photosensitive element 30 can be improved.
In an embodiment, please refer to fig. 1 and 13, fig. 13 is a schematic cross-sectional view illustrating a third cross-sectional structure of the display device shown in fig. 1, where the display device includes a display panel 10, a lens layer 20 disposed on a backlight side of the display panel 10, a glass cover plate 40 disposed on a light-emitting side of the display panel 10, and a photosensitive element 30 disposed on a side of the lens layer 20 away from the display panel 10. The lens assembly 201 corresponding to the optical sensing area is arranged in the lens layer 20, and the lens assembly 201 includes a plurality of microlenses arranged in an array and having a sub-wavelength size.
The photosensitive element 30 includes a first sensor 30a provided corresponding to the image pickup region a1 and a second sensor 30b provided corresponding to the fingerprint recognition region a 2; the lens assembly 201 comprises a first lens assembly 201a arranged corresponding to the first sensor 30a and a second lens assembly 201b arranged corresponding to the second sensor 30b, the first sensor 30a is used for image shooting, and the second sensor 30b is used for fingerprint identification. The first lens assembly 201a comprises a plurality of first microlenses arranged in an array and having a sub-wavelength size, wherein the first microlenses allow natural light to pass through; the second lens assembly 201b includes a plurality of second microlenses arranged in an array and having a sub-wavelength size, and the second microlenses allow infrared light to pass through.
The lens layer 20 further includes a second substrate 203 and a second protective layer 204, the lens assembly 201 is disposed on a side surface of the second substrate 203, the second protective layer 204 is disposed along the second substrate 203 and covers the lens assembly 201, and a side surface of the second protective layer 204 far away from the second substrate 203 is connected to the display panel 10. The lens assembly 201 may be connected to the display panel 10 after the second substrate 203 is manufactured, and the method for manufacturing the lens assembly 201 may be ultraviolet lithography, nano-imprinting, electron beam exposure, laser direct writing, or the like. The photosensitive element 30 is disposed on a side of the lens layer 20 away from the display panel 10, and is connected to the second substrate 203, and the photosensitive element 30 receives the light transmitted through the lens assembly 201 to implement its corresponding function.
In this embodiment, the first lens assembly 201a and the second lens assembly 201b are both disposed on one side of the second substrate 203 away from the photosensitive element 30, and a distance between the photosensitive element 30 and the lens assembly 201 is increased compared to the previous embodiment, so that on the premise of meeting the requirement of the photosensitive element 30, the relative distance between the lens assembly 201 and the photosensitive element 30 is set more flexibly in the present application by combining the previous embodiment.
In an embodiment, please refer to fig. 1 and 14, fig. 14 is a schematic diagram of a fourth cross-sectional structure of the display device shown in fig. 1, which includes a display panel 10, a lens layer 20 disposed on a backlight side of the display panel 10, a glass cover plate 40 disposed on a light-emitting side of the display panel 10, and a photosensitive element 30 disposed on a side of the lens layer 20 away from the display panel 10. The lens assembly 201 corresponding to the optical sensing area is arranged in the lens layer 20, and the lens assembly 201 includes a plurality of microlenses arranged in an array and having a sub-wavelength size.
The photosensitive element 30 includes a first sensor 30a provided corresponding to the image pickup region a1 and a second sensor 30b provided corresponding to the fingerprint recognition region a 2; the lens assembly 201 comprises a first lens assembly 201a arranged corresponding to the first sensor 30a and a second lens assembly 201b arranged corresponding to the second sensor 30b, the first sensor 30a is used for image shooting, and the second sensor 30b is used for fingerprint identification. The first lens assembly 201a comprises a plurality of first microlenses arranged in an array and having a sub-wavelength size, wherein the first microlenses allow natural light to pass through; the second lens assembly 201b includes a plurality of second microlenses arranged in an array and having a sub-wavelength size, and the second microlenses allow infrared light to pass through.
The lens layer 20 further includes a second substrate 203, and a first protective layer 202 and a second protective layer 204 disposed along two opposite sides of the second substrate 203, the lens assemblies 201 are disposed on two opposite sides of the second substrate 203 and are respectively covered by the first protective layer 202 and the second protective layer 204, and a surface of one side of the second protective layer 204, which is far away from the second substrate 203, is connected to the display panel 10. The first lens assembly 201a includes two portions respectively disposed on two opposite sides of the second substrate 203, and the second lens assembly 201b also includes two portions respectively disposed on two opposite sides of the second substrate 203. The photosensitive element 30 is disposed on a side of the lens layer 20 away from the display panel 10, and is connected to the first protection layer 202, and the photosensitive element 30 receives the light transmitted through the lens assembly 201 to implement its corresponding function.
In this embodiment, the first lens assembly 201a and the second lens assembly 201b are both disposed on opposite sides of the second substrate 203, and light rays are converged by the two lens assemblies, so that the amount of light rays emitted to the photosensitive element 30 is increased, and the improvement of the photosensitive sensitivity of the photosensitive element 30 is facilitated.
It should be noted that, although the present application has been described with reference to specific examples, the above-mentioned examples are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be limited by the appended claims.
Claims (10)
1. A display device having an optically sensitive area, the display device comprising:
a display panel having a light exit side and a backlight side opposite the light exit side;
the lens layer is arranged on the backlight side of the display panel and comprises a lens component arranged corresponding to the optical sensing area, and the lens component comprises a plurality of micro lenses which are arranged in an array and have sub-wavelength sizes;
and the photosensitive element is arranged on one side of the lens layer, which is far away from the display panel, and is arranged corresponding to the optical sensing area.
2. A display device as claimed in claim 1, characterized in that the orthographic projection of the light-sensitive elements on the lens layer lies within the extent of the lens assembly.
3. The display device according to claim 1, wherein the display panel comprises a first substrate on a backlight side thereof, the lens layer further comprising a first protective layer;
the lens assembly is connected with one side surface of the first substrate facing the lens layer, and the first protective layer is arranged along the first substrate and covers the lens assembly.
4. The display device according to claim 1, wherein the lens layer further comprises a second substrate, the lens assembly being disposed on one side surface of the second substrate, and a first protective layer disposed along the second substrate and covering the lens assembly;
and the surface of one side of the second substrate, which is opposite to the side provided with the lens component, is connected with the display panel.
5. The display device according to claim 1, wherein the lens layer further comprises a second substrate and a second protective layer, the lens assembly is disposed on one side surface of the second substrate, and the second protective layer is disposed along the second substrate and covers the lens assembly;
and the surface of one side of the second protective layer, which is far away from the second substrate, is connected with the display panel.
6. The display device of claim 1, wherein the lens layer further comprises a second substrate, and first and second protective layers disposed along opposite sides of the second substrate, the lens assemblies being disposed on opposite sides of the second substrate and covered by the first and second protective layers, respectively;
and the surface of one side of the second protective layer, which is far away from the second substrate, is connected with the display panel.
7. The display device according to claim 1, wherein the optical sensing area comprises a camera area and a fingerprint recognition area, and the light sensing element comprises a first sensor arranged corresponding to the camera area and a second sensor arranged corresponding to the fingerprint recognition area;
the lens assembly comprises a first lens assembly arranged corresponding to the first sensor and a second lens assembly arranged corresponding to the second sensor.
8. The display device of claim 7, wherein the first lens assembly comprises a plurality of first microlenses arranged in an array and having a subwavelength dimension, the first microlenses allowing natural light to pass therethrough;
the second lens component comprises a plurality of second micro lenses which are arranged in an array and have sub-wavelength sizes, and the second micro lenses allow infrared light to penetrate through.
9. The display device according to claim 8, wherein the first microlenses are made of a material including at least one of titanium oxide, gallium phosphide, and silicon nitride, and the second microlenses are made of a material including silicon.
10. The display device according to claim 1, wherein the micro-lenses have a size ranging from 100 nm to 1000 nm, and the shape of the micro-lenses includes a rectangular parallelepiped, a cube, a cylinder, and a V-shaped body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269027.7A CN113934039A (en) | 2021-10-29 | 2021-10-29 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269027.7A CN113934039A (en) | 2021-10-29 | 2021-10-29 | Display device |
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| CN113934039A true CN113934039A (en) | 2022-01-14 |
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| CN202111269027.7A Pending CN113934039A (en) | 2021-10-29 | 2021-10-29 | Display device |
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| CN112379469A (en) * | 2020-11-09 | 2021-02-19 | 湖南大学 | Optical lens with super-structured surface and imaging device |
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