CN110928017A - Display panel - Google Patents
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- CN110928017A CN110928017A CN201911284366.5A CN201911284366A CN110928017A CN 110928017 A CN110928017 A CN 110928017A CN 201911284366 A CN201911284366 A CN 201911284366A CN 110928017 A CN110928017 A CN 110928017A
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- substrate
- array
- detector
- display panel
- micro lens
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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
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- 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
-
- 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
- G02F1/133528—Polarisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
Abstract
The present invention provides a display panel, comprising: a first substrate; the second base plate comprises a substrate and a black matrix positioned on the side of the substrate close to the first base plate; the liquid crystal layer is filled between the first substrate and the second substrate; the polaroid is attached to the second substrate and is positioned on one side of the second substrate, which is far away from the first substrate; the cover plate is attached to the polaroid and is positioned on one side of the polaroid, which is far away from the second substrate; the fingerprint identification module is arranged in the area of the black matrix and comprises a micro lens array and a detector array, the micro lens array comprises micro lens units arranged in an array, the detector array comprises detector units arranged in an array, and the detector units correspond to the micro lens units one to one; wherein, the micro lens array is arranged between the black matrix and the cover plate, and the detector array is arranged in the direction of the micro lens array far away from the cover plate. The fingerprint identification module is arranged in the film layer structure of the display panel, so that a foundation is provided for the development and application of the fingerprint identification technology in the display screen.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel.
Background
The fingerprint identification technology is widely applied to smart phones all the time, can unlock screens, and has functions of financial payment and the like. With the popularity of the full-screen, a brand new fingerprint identification technology, namely, the fingerprint identification technology under the screen, is developed in order to realize the high screen occupation ratio of the mobile phone. The common technology for identifying fingerprints under a screen is that a fingerprint image acquisition module is externally added under a display screen, and a method for realizing fingerprint identification application in the display screen does not exist.
Therefore, the fingerprint recognition technology in the existing display screen needs to be developed.
Disclosure of Invention
The invention provides a display panel, which applies a fingerprint identification technology to a display screen.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the present invention provides a display panel including:
a first substrate;
the second base plate is arranged opposite to the first base plate and comprises a substrate and a black matrix positioned on the substrate close to the side of the first base plate;
the liquid crystal layer is filled between the first substrate and the second substrate;
the polaroid is attached to the second substrate and positioned on one side of the second substrate, which is far away from the first substrate;
the cover plate is attached to the polaroid and is positioned on one side of the polaroid, which is far away from the second substrate;
the fingerprint identification module is arranged in the area of the black matrix and comprises a micro lens array and a detector array, the micro lens array comprises micro lens units arranged in an array, the detector array comprises detector units arranged in an array, and the detector units correspond to the micro lens units one to one;
wherein the micro lens array is arranged between the black matrix and the cover plate, and the detector array is arranged in the direction of the micro lens array far away from the cover plate.
In the display panel provided by the invention, the detector array is arranged on the first substrate, and the micro lens array is arranged between the second substrate and the polarizer.
In the display panel provided by the invention, the black matrix positioned in the middle of the detector unit is provided with the opening.
In the display panel provided by the invention, the detector array is arranged between the black matrix and the substrate of the second substrate, and the micro lens array is arranged between the second substrate and the polarizer.
In the display panel provided by the invention, the detector array and the micro lens array are both arranged between the second substrate and the polarizer.
In the display panel provided by the invention, the refractive index of the micro-lens array material is 1.4-1.7.
In the display panel provided by the invention, the aperture of the micro-lens unit is 10-25 um.
In the display panel provided by the invention, the curvature radius of the micro lens unit is 9-16 um.
In the display panel provided by the invention, the height of the micro lens unit is 3-15 um.
In the display panel provided by the invention, the size of the detector unit is 5-15 um.
The present invention provides a display panel, including: a first substrate; the second base plate is arranged opposite to the first base plate and comprises a substrate and a black matrix positioned on the substrate side close to the first base plate; the liquid crystal layer is filled between the first substrate and the second substrate; the polaroid is attached to the second substrate and is positioned on one side of the second substrate, which is far away from the first substrate; the cover plate is attached to the polaroid and is positioned on one side of the polaroid, which is far away from the second substrate; the fingerprint identification module is arranged in the area of the black matrix and comprises a micro lens array and a detector array, the micro lens array comprises micro lens units arranged in an array, the detector array comprises detector units arranged in an array, and the detector units correspond to the micro lens units one to one; wherein, the micro lens array is arranged between the black matrix and the cover plate, and the detector array is arranged in the direction of the micro lens array far away from the cover plate. The fingerprint identification module is arranged in the film layer structure of the display panel, so that a foundation is provided for the development and application of the fingerprint identification technology in the display screen.
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 panel according to an embodiment of the present invention.
Fig. 2 is a schematic view of a second structure of a display panel according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a display panel according to a third embodiment of the present invention.
Fig. 4 is a schematic top view of a display panel according to an embodiment of the present invention.
Fig. 5 is a structural dimension diagram of a microlens unit according to an embodiment of the present invention.
Fig. 6 is a partially enlarged schematic view of a display panel with a third structure according to an embodiment of the present invention.
Fig. 7(a) is a schematic diagram of a first three-dimensional structure of a microlens unit according to an embodiment of the present invention.
Fig. 7(b) is a schematic diagram of a second three-dimensional structure of a microlens unit according to an embodiment of the present invention.
Fig. 7(c) is a schematic diagram of a third three-dimensional structure of a microlens unit according to an embodiment of the present invention.
Detailed Description
While the embodiments and/or examples of the present invention will be described in detail and fully with reference to the specific embodiments thereof, it should be understood that the embodiments and/or examples described below are only a part of the embodiments and/or examples of the present invention and are not intended to limit the scope of the invention. All other embodiments and/or examples, which can be obtained by a person skilled in the art without making any inventive step, based on the embodiments and/or examples of the present invention, belong to the scope of protection of the present invention.
Directional terms used in the present invention, such as [ upper ], [ lower ], [ left ], [ right ], [ front ], [ rear ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terminology is used for the purpose of describing and understanding the invention and is in no way limiting. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
Thanks to the electronic integrated manufacturing technology and the fast and reliable algorithm research, the optical fingerprint identification technology in the fingerprint identification technology has started to enter our daily life, and becomes the most deep, widely applied and mature technology in the current biological detection science. The working principle of the optical fingerprint identification technology is that light rays emitted by a light source in a display panel irradiate fingers, reflected light is formed by reflection of the fingers, the formed reflected light is transmitted to a fingerprint identification detector, and the fingerprint identification detector collects optical signals incident to the detection surface of the fingerprint identification detector. Because specific lines exist on the fingerprint, the intensity of reflected light formed by light at each position of the finger is different, and finally, the light signals collected by each fingerprint identification detector are different, so that the fingerprint identification function is realized.
The existing fingerprint identification technology is generally integrated outside the display panel, the fingerprint identification technology in the display screen is yet to be developed, and the fingerprint identification technology is applied to the interior of the display screen by the display panel.
Referring to fig. 1 to 3, fig. 1 to 3 are schematic views of three structures of a display panel according to an embodiment of the present invention, where the display panel includes:
a first substrate 110;
a second substrate 120, disposed opposite to the first substrate 110, including a substrate 121, a black matrix 122 located on the substrate 121 near the first substrate 110, and a color resistance layer 123 located on the substrate 121 near the first substrate 110;
a liquid crystal layer 130 filled between the first substrate 110 and the second substrate 120;
the polarizer 140 is attached to the second substrate 120 through the first optical adhesive layer 161 and located on one side of the second substrate 120 away from the first substrate 110;
the cover plate 150 is attached to the polarizer 140 through the second optical adhesive layer 162 and is located on one side of the polarizer 140 away from the second substrate 120;
the fingerprint identification module 170 is arranged in the area of the black matrix 122 and comprises a detector array 171 and a micro lens array 172, the detector array comprises detector units arranged in an array, the micro lens array comprises micro lens units arranged in an array, and the detector units correspond to the micro lens units one to one;
wherein the micro lens array 172 is disposed between the black matrix and the cover plate, and the detector array 171 is disposed in a direction in which the micro lens array 172 is away from the cover plate.
The embodiment provides a display panel, which comprises a fingerprint identification module, wherein the fingerprint identification module is arranged in an area of a black matrix and comprises a detector array and a micro-lens array, the detector array comprises detector units arranged in an array, the micro-lens array comprises micro-lens units arranged in an array, the detector units and the micro-lens units are in one-to-one correspondence, the micro-lens array is arranged between the black matrix and a cover plate, and the detector array is arranged in the direction of the micro-lens array away from the cover plate; through setting up fingerprint identification module inside display panel's membranous layer structure, for the development and application of fingerprint identification technique in the display screen provides the basis.
The fingerprint identification module 170 includes a detector array 171 and a microlens array 172, and the detector array 171 and the microlens array 172 are distributed in the display panel in an array, wherein the number of the detector units is the same as that of the microlens units, and the microlens units are correspondingly arranged on the receiving surface of the detector units.
The detector unit is used for receiving light reflected by the fingerprint, converting the light into an electric signal and forming an optical fingerprint pattern by the electric signal so as to finish fingerprint identification operation; the fingerprint reflection light is light that is emitted from the display panel and reflected by a finger when the finger touches the display panel. The microlens unit includes a receiving surface for receiving the above-mentioned fingerprint reflected light.
The micro lens unit is used for converging the fingerprint reflected light rays passing through the micro lens unit towards the receiving surface of the corresponding detector unit. The micro-lens unit is used for changing the inclined light path of the receiving surface of the detector unit relative to the fingerprint reflected light, optimizing the inclined path of the fingerprint reflected light, enabling the inclined path of the fingerprint reflected light to tend to be perpendicular to the receiving surface of the detector unit, reducing the quantity of reflected and refracted light, improving the light conversion efficiency and the uniformity of the light conversion efficiency, further improving the definition of formed optical fingerprint patterns and improving the fingerprint identification precision.
The display panel provided by the present invention will be further explained with reference to specific embodiments.
In an embodiment, as shown in fig. 1, fig. 1 is a schematic view of a first structure of a display panel according to an embodiment of the present invention. The detector array 171 is disposed on the first substrate 110, and the microlens array 172 is disposed between the second substrate 120 and the cover plate 150.
In an embodiment of the invention, the first substrate 110 is an array substrate, and the second substrate 120 is a color filter substrate. Specifically, the detector array 171 is integrated on the array substrate, the detector array 171 may be located on the pixel electrode layer, and the detector array 171 is driven separately; the film structure of the array substrate above the detector array 171 is a transparent film so that the detector array receives the reflected light from the fingerprint on the surface of the display panel.
The microlens array 172 may be disposed on the substrate 121 of the color filter substrate, as shown in fig. 1, the first optical adhesive layer 161 is used for adhering the color filter substrate and the polarizer 140, and is used for planarizing and protecting the microlens array 172; the microlens array 172 may also be disposed on the polarizer 140, and the second optical adhesive layer 162 serves to adhere the polarizer 140 and the cover plate 150, as well as to planarize and protect the microlens array 172. The micro-lens array 172 is arranged in the film layer structure of the display panel, the micro-lens array 172 is flattened and protected by means of the optical glue layer, other film layer structures are not required to be added, and the micro-lens array 172 is flattened and protected, so that the thickness of the whole display panel is reduced.
The first optical adhesive layer 161 and the second optical adhesive layer 162 may be made of OCA (optical clear adhesive), and OCA is a special double-sided adhesive without a base material and having optical transparency, high light transmittance (total light transmittance > 99%), high adhesive force and high water resistance.
The material of the micro lens array 172 can be a transparent organic material or a transparent zone-level material, and the refractive index of the material of the micro lens array 172 is greater than that of the material of the optical adhesive layer located thereon, so that the fingerprint identification light can be guaranteed to have a converging effect when entering the micro lens unit, and the refractive index of the material of the micro lens array 172 is 1.4-1.7.
As shown in fig. 4, fig. 4 is a schematic top view of a display panel according to an embodiment of the present invention. As shown in fig. 4 (a), the detector units 171 are arranged in an array in the black matrix 122 region of the display panel, located in the color barrier spacing region of the adjacent row, and arranged periodically with the second color barrier 1232. As shown in fig. 4 (b), the microlens units 172 are disposed in one-to-one correspondence with the detector units 171, and the microlens units 172 coincide with projections of the centers of the detector units 171 on the black matrix layer 122.
Therefore, the bottom size of the microlens unit and the spacing between adjacent microlens units are determined by the spacing distance between adjacent rows of color resistors, the arrangement period of the color resistors, the aperture ratio and other factors. Specifically, as shown in fig. 5, the bottom aperture D of the microlens unit is 10 to 25 um.
As shown in fig. 7(a) to 7(c), fig. 7(a) to 7(c) are schematic diagrams of three dimensional structures of the microlens unit according to the embodiment of the present invention. The bottom of the microlens unit can be round, square, rectangular or other shapes.
When the bottom of the micro lens unit is circular, the imaging of the micro lens unit is also circular, so that the fingerprint identification light irradiated on the outer surface of the micro lens unit can be ensured to obtain the convergence effect. The bottom of the micro lens unit is round, and when the detector unit is connected with the projection of the micro lens unit on the black matrix layer in an inscribing mode relative to the micro lens unit, a fingerprint signal is not completely received; when the projection of the micro lens unit on the black matrix layer is circumscribed by the detector unit, the situation that too many interference light signals are received exists.
Therefore, as shown in fig. 7(b) and 7(c), the bottom of the microlens unit is formed in a square or rectangular shape, and the imaging surface thereof is also formed in a square or rectangular shape, and the shape and size of the detector unit are designed to be the shape and size of the imaging surface, respectively, so that effective fingerprint recognition light can be sufficiently utilized without introducing excessive disturbance light. When the bottom of the detector unit is set to be rectangular, the long edge of the detector unit can be arranged along the repeated arrangement direction of the color resistors, so that more fingerprint signals can be collected, and the aperture opening ratio can not be sacrificed.
The curvature radius R and the rise H of the microlens unit are related to the material of the upper optical adhesive layer and the material of the microlens unit, and when the material of the upper optical adhesive layer and the material of the microlens unit are changed and the refractive indexes corresponding to the materials are changed, the thickness of the corresponding optical adhesive layer and the curvature radius R and the rise H of the microlens unit are also changed. Generally, the refractive index ranges of the microlens array material and the upper optical adhesive layer material are 1.4-1.7, the curvature radius R of the microlens unit is 9-16 um, and the rise H of the microlens unit is 3-15 um.
Correspondingly, the size of the detector unit is determined by the field angle (effective fingerprint identification light) of the microlens unit, the focal length of the microlens unit and the size of interference light formed by adjacent fingerprint identification light, and is generally 5-15 um. The detector unit is generally square, and the side length of the square ranges from 5um to 15 um.
In this embodiment, since the detector array 171 is disposed on the array substrate, the microlens array 172 is disposed on the color film substrate, and a black matrix is disposed between the corresponding detector unit and the corresponding microlens unit, and the black matrix can block light, an opening needs to be disposed on the black matrix 122 disposed between the detector unit and the microlens unit, the position of the opening should be located at the center of the detector unit and the microlens unit, the shape and the size of the opening are preferably designed to be the shape and the size of an imaging surface of the fingerprint identification light at the position of the opening, the shape of the opening is generally square, and the size of the opening is generally 7-10 um.
In another embodiment, as shown in fig. 2, fig. 2 is a schematic view of a second structure of a display panel according to an embodiment of the present invention. The detector array 171 is disposed between the black matrix 122 and the substrate 121 of the second base plate, and the microlens array 172 is disposed between the second base plate 120 and the cover plate 150.
As in the foregoing embodiment, the microlens array 172 may be disposed on the substrate 121 of the color filter substrate, as shown in fig. 1, the first optical adhesive layer 161 is used for adhering the color filter substrate and the polarizer 140, and is used for planarizing and protecting the microlens array 172; the microlens array 172 may also be disposed on the polarizer 140, and the second optical adhesive layer 162 serves to adhere the polarizer 140 and the cover plate 150, as well as to planarize and protect the microlens array 172. The material of the first optical adhesive layer 161 and the second optical adhesive layer 162 may be OCA.
The material of the micro lens array 172 can be a transparent organic material or a transparent area-level material, and the refractive index of the material of the micro lens array 172 is 1.4-1.7.
The arrangement, the arrangement size, and the arrangement principle of the detector unit and the microlens unit are similar to those of the above embodiments, and specific reference may be made to the above embodiments, which are not described herein again.
In this embodiment, the detector array 171 is disposed between the black matrix 122 and the substrate 121 of the second substrate, and compared with the display panel with the first structure, there is no black matrix layer between the matched microlens unit and the detector unit, so that light is not blocked, and it is beneficial for the detector unit to receive the fingerprint identification light converged by the microlens unit.
Compare in above-mentioned embodiment, the distance between the microlens unit that matches and the detector unit shortens in this embodiment, and fingerprint identification light just is received by the detector unit through shorter route after assembling via microlens unit surface, has narrowed the scope of effective fingerprint identification light, has reduced the interference of interference light to the detector unit, is favorable to display panel to more accurate discernment of fingerprint.
In this embodiment, the detector array 171 may be designed by first integrating the detector array 171 on the substrate 121 of the second substrate, then forming the black matrix layer 122 on the detector array 171, and then depositing the color resist layer 123 on the black matrix layer 122.
In another embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of a third display panel according to an embodiment of the present invention. And a detector array 171 and a microlens array 172, which are disposed between the second substrate 120 and the polarizer 140.
In one embodiment, as shown in fig. 1 and 2, the microlens array 172 includes only microlens elements, without a lens substrate.
In another embodiment, as shown in fig. 3 and 6, microlens array 172 includes a lens substrate 1721 and microlens elements 1722, the microlens elements 1722 are located on a side of the lens substrate away from the detector array, and the lens substrate 1721 and the microlens elements 1722 are integrally disposed. The lens substrate 1721 covers the detector unit 17.
In this embodiment, since the detector array 171 and the microlens array 172 are disposed in contact, and the microlens units are directly fabricated on the detector unit 171, the detector unit 171 has a certain thickness, which reduces the actual rise of the microlens units, and therefore, it is necessary to dispose a lens substrate 1721 under the microlens unit 1722, and the lens substrate 1721 flattens the detector unit while supporting the microlens unit 1722. The height L2 of the lens substrate 1721 is greater than the height L1 of the detector unit 171. The sum of the total height L3 of the micro lens array 172 and the height L4 of the first optical glue 161 is 50-100 um.
The material of the micro lens array 172 can be a transparent organic material or a transparent area-level material, and the refractive index of the material of the micro lens array 172 is 1.4-1.7.
The arrangement, the arrangement size, and the arrangement principle of the detector unit and the microlens unit are similar to those of the above embodiments, and specific reference may be made to the above embodiments, which are not described herein again.
In the present embodiment, the detector array 171 and the microlens array 172 are disposed in contact, and both are disposed between the second substrate 120 and the polarizer 140. Compare in the display panel of above-mentioned first kind of structure, there is not the black matrix layer between assorted microlens unit and the detector unit, can not block light, is favorable to the fingerprint identification light that the microlens unit of detector unit receipt converged.
Compare in the display panel of above-mentioned second kind of structure, the distance between the microlens unit and the detector unit that matches in this embodiment further shortens, and fingerprint identification light assembles the back via microlens unit surface, and direct or just received by the detector unit via the path of short extremely, has further narrowed the scope of effective fingerprint identification light, has reduced the interference of interference light to the detector unit, is favorable to more accurate discernment of display panel to the fingerprint more.
According to the above embodiments:
an embodiment of the present invention provides a display panel, including: a first substrate; the second base plate is arranged opposite to the first base plate and comprises a substrate and a black matrix positioned on the substrate side close to the first base plate; the liquid crystal layer is filled between the first substrate and the second substrate; the polaroid is attached to the second substrate and is positioned on one side of the second substrate, which is far away from the first substrate; the cover plate is attached to the polaroid and is positioned on one side of the polaroid, which is far away from the second substrate; the fingerprint identification module is arranged in the area of the black matrix and comprises a micro lens array and a detector array, the micro lens array comprises micro lens units arranged in an array, the detector array comprises detector units arranged in an array, and the detector units correspond to the micro lens units one to one; wherein, the micro lens array is arranged between the black matrix and the cover plate, and the detector array is arranged in the direction of the micro lens array far away from the cover plate. The fingerprint identification module is arranged in the film layer structure of the display panel, so that a foundation is provided for the development and application of the fingerprint identification technology in the display screen.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A display panel, comprising:
a first substrate;
the second base plate is arranged opposite to the first base plate and comprises a substrate and a black matrix positioned on the substrate close to the side of the first base plate;
the liquid crystal layer is filled between the first substrate and the second substrate;
the polaroid is attached to the second substrate and positioned on one side of the second substrate, which is far away from the first substrate;
the cover plate is attached to the polaroid and is positioned on one side of the polaroid, which is far away from the second substrate;
the fingerprint identification module is arranged in the area of the black matrix and comprises a micro lens array and a detector array, the micro lens array comprises micro lens units arranged in an array, the detector array comprises detector units arranged in an array, and the detector units correspond to the micro lens units one to one;
wherein the micro lens array is arranged between the black matrix and the cover plate, and the detector array is arranged in the direction of the micro lens array far away from the cover plate.
2. The display panel of claim 1, wherein the detector array is disposed on the first substrate and the microlens array is disposed between the second substrate and the polarizer.
3. The display panel of claim 2, wherein the black matrix at a middle position of the detector unit is provided with an opening.
4. The display panel of claim 1, wherein the detector array is disposed between the black matrix and the substrate of the second substrate, and the microlens array is disposed between the second substrate and the polarizer.
5. The display panel of claim 1, wherein the detector array and the microlens array are disposed between the second substrate and the polarizer.
6. The display panel of claim 1, wherein the refractive index of the microlens array material is 1.4 to 1.7.
7. The display panel according to claim 1, wherein the aperture of the microlens unit is 10 to 25 um.
8. The display panel of claim 1, wherein the microlens unit has a radius of curvature of 9 to 16 um.
9. The display panel of claim 1, wherein the height of the microlens unit is 3-15 um.
10. The display panel of claim 1, wherein the detector unit has a size of 5-15 um.
Priority Applications (1)
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