CN108334841B - Display panel, display device and manufacturing method of display panel - Google Patents
Display panel, display device and manufacturing method of display panel Download PDFInfo
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- CN108334841B CN108334841B CN201810101237.7A CN201810101237A CN108334841B CN 108334841 B CN108334841 B CN 108334841B CN 201810101237 A CN201810101237 A CN 201810101237A CN 108334841 B CN108334841 B CN 108334841B
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- fingerprint identification
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- display panel
- frame glue
- identification area
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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
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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
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Image Input (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a display panel, a display device and a manufacturing method of the display panel. The display panel includes: array substrate and fingerprint identification module, fingerprint identification module include the second substrate, the surface that the second substrate closes on the array substrate includes the fingerprint identification region and surrounds the regional non-fingerprint identification region of fingerprint identification; the fingerprint identification area is provided with a fingerprint identification unit; the frame glue is arranged in the non-fingerprint identification area, surrounds the fingerprint identification area, and is bonded with the first substrate on the side away from the second substrate, so that the surface of the fingerprint identification unit away from the second substrate is bonded with the first substrate. The embodiment of the invention solves the problems of low light transmittance, large thickness of the display panel and complex manufacturing process of the fingerprint identification module of the conventional display panel, and achieves the effects of increasing the light transmittance of the fingerprint identification module, reducing the thickness of the display panel and simplifying the manufacturing process of the display panel.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel, a display device, and a method for manufacturing the display panel.
Background
At present, a display panel is widely used as an information input tool in various display products such as mobile phones, tablet computers, information inquiry machines in halls of public places, and the like. Fingerprint recognition, which is a way of user authentication and access control, is widely used in display panels because it has the advantage of high security.
In order to promote user's experience, can set up fingerprint identification module under the screen usually to make the user carry out fingerprint identification when the display product of operation full face screen. In display panel, the area that sets up fingerprint identification module under the screen not only can realize normal demonstration function, can also carry out fingerprint identification, has richened display panel's function. However, in the conventional display panel, the off-screen fingerprint identification module and the array substrate having the display function are generally adhered together by an Optical Clear Adhesive (OCA) or the like. For the display panel, the arrangement of the OCA reduces the light transmittance of the fingerprint identification module and increases the thickness of the display panel; for the manufacturing process, coating the OCA requires not only one coating process but also a defoaming process for the OCA.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a manufacturing method of the display panel, and aims to achieve the purposes of increasing the light transmittance of a fingerprint identification module, reducing the thickness of the display panel and simplifying the manufacturing process of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the array substrate comprises a first substrate and a plurality of pixel units positioned on the first substrate;
the fingerprint identification module is arranged on one side, far away from the pixel unit, of the first substrate;
the fingerprint identification module comprises a second substrate, wherein the surface of the second substrate close to the array substrate comprises a fingerprint identification area and a non-fingerprint identification area surrounding the fingerprint identification area; the fingerprint identification area is provided with a fingerprint identification unit;
the non-fingerprint identification area is provided with frame glue, the frame glue surrounds the fingerprint identification area, one side of the frame glue, which is far away from the second substrate, is bonded with the first substrate, and the surface, which is far away from the second substrate, of the fingerprint identification unit is bonded with the first substrate.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes the display panel according to any embodiment of the present invention.
In a third aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, where the method includes:
providing an array substrate, wherein the array substrate comprises a first substrate and a plurality of pixel units positioned on the first substrate;
providing a fingerprint identification module, wherein the fingerprint identification module comprises a second substrate, the surface of the second substrate close to the array substrate comprises a fingerprint identification area and a non-fingerprint identification area surrounding the fingerprint identification area, and the fingerprint identification area is provided with a fingerprint identification unit;
arranging frame glue in the non-fingerprint identification area, wherein the frame glue surrounds the fingerprint identification area;
and bonding one side of the frame glue, which is far away from the second substrate, with one side of the first substrate, which is far away from the pixel unit, so that the surface of the fingerprint identification unit, which is far away from the second substrate, is bonded with the first substrate.
According to the technical scheme provided by the embodiment of the invention, the frame glue is arranged in the non-fingerprint identification area, the frame glue surrounds the fingerprint identification area, one side of the frame glue, which is far away from the second substrate, is bonded with the first substrate, so that the surface of the fingerprint identification unit, which is far away from the second substrate, is bonded with the first substrate. Namely, the fingerprint identification unit is fixedly attached to the first substrate through the frame glue. Compared with the prior art, need not to set up the OCA layer between fingerprint identification module and array substrate. Therefore, the technical scheme provided by the invention enhances the transmittance of the light reflected by the fingerprint, namely, the light transmittance of the fingerprint identification module is enhanced; in addition, the thickness of the display panel is reduced by omitting the OCA layer, and the light and thin display panel is facilitated to be realized; in the manufacturing process of the display panel, OCA coating and defoaming processes are omitted, so that the manufacturing process of the display panel is simplified, and the manufacturing cost of the display panel is reduced.
Drawings
Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a light sensor according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a film layer of a light sensor according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a display device according to an embodiment of the present invention;
fig. 8 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic view of a display panel according to an embodiment of the present invention. Referring to fig. 1, the display panel 500 includes: array substrate 10 and fingerprint identification module 20. The array substrate 10 includes a first substrate 110 and a plurality of pixel units 120 on the first substrate 110. The fingerprint identification module 20 is disposed on a side of the first substrate 110 away from the pixel unit 120. Wherein, the fingerprint identification module 20 includes the second substrate 210, and the surface that the second substrate 210 closes on the array substrate 10 includes the fingerprint identification area 201 and surrounds the non-fingerprint identification area 202 of the fingerprint identification area 201; the fingerprint identification area 201 is provided with a fingerprint identification unit 220; the sealant 30 is disposed in the non-fingerprint identification region 202, the sealant 30 surrounds the fingerprint identification region 201, and one side of the sealant 30 away from the second substrate 210 is bonded to the first substrate 110, so that the surface of the fingerprint identification unit 220 away from the second substrate 210 is attached to the first substrate 110.
The array substrate 10 is used for displaying images, and the array substrate 10 may be an organic light emitting array substrate, a liquid crystal display array substrate, or other array substrates for displaying. Fingerprint identification module 20 is used for discerning fingerprint information. The fingerprint refers to lines generated by convex and concave unevenness on the skin of the front face of the tail end of a human finger, and the lines are divided into ridge lines and valley lines. With reference to fig. 1, in the technical solution provided in the embodiment of the present invention, the array substrate 10 may display an image on a side away from the fingerprint identification module 20, and may also perform fingerprint identification on an area where the image is displayed. When fingerprint identification is performed on the display panel 500, the finger 40 is placed on the side of the array substrate 10 away from the fingerprint identification module 20, the light L1 emitted by the pixel unit 120 is refracted and reflected on the interface between the display panel 500 and the finger 40, and the fingerprint identification unit 220 completes fingerprint identification through the information of the collected light L2 due to the difference between the reflection angle on the ridge line and the valley line and the light intensity of the reflected light L2. The stronger the intensity of the light L2 received by the fingerprint identification unit 220, the more accurate the fingerprint identification unit 220 identifies a fingerprint. However, in the prior art, the fingerprint identification module 20 and the array substrate 10 are usually adhered together by an adhesive layer such as OCA, that is, a layer of OCA is disposed between the fingerprint identification module 20 and the array substrate 10. Therefore, the light L2 reflected by the finger 40 needs to pass through not only the array substrate 10 but also the OCA layer, which affects the transmittance of the light L2. In addition, the provision of the OCA layer also increases the thickness of the display panel 500; in the manufacturing process of the display panel 500, since the coating of the OCA requires not only one coating process but also defoaming of the OCA, the number of manufacturing processes of the display panel is increased by providing the OCA layer.
In the display panel 500 provided in this embodiment, the sealant 30 is disposed in the non-fingerprint identification region 202, the sealant 30 surrounds the fingerprint identification region 201, one side of the sealant 30 away from the second substrate 210 is bonded to the first substrate 110, so that the surface of the fingerprint identification unit 220 away from the second substrate 210 is bonded to the first substrate 110, and the fingerprint identification unit 220 is fixedly bonded to the first substrate 110. In the technical scheme of the present invention, the sealant 30 has the light leakage preventing and buffering functions, and also has the function of fixedly attaching the fingerprint identification unit 220 to the first substrate 110. Compared with the prior art, the setting that adopts the OCA layer between fingerprint identification module 20 and array substrate 10 has been saved. Therefore, the technical scheme provided by the invention enhances the transmittance of the light ray L2 reflected by the finger 40, namely, the light transmittance of the fingerprint identification module 20 is enhanced; in addition, the omission of the OCA layer also reduces the thickness of the display panel 500, which is beneficial to the lightness and thinness of the display panel 500; in the manufacturing process of the display panel 500, the OCA coating and defoaming process is omitted, the manufacturing process of the display panel 500 is simplified, and the manufacturing cost of the display panel 500 is reduced.
With reference to fig. 1, based on the above technical solution, the width d1 of the sealant 30 along the direction from the fingerprint identification region 201 to the non-fingerprint identification region 202 may be greater than or equal to 3 mm. By the arrangement, the frame glue 30, the second substrate 210 and the first substrate 110 have a larger contact area, so that the frame glue 30, the second substrate 210 and the first substrate 110 have stronger bonding strength, and the fingerprint identification module 20 can be stably attached to the array substrate 10.
Based on the above technical solutions, optionally, the width d1 of the sealant 30 along the direction from the fingerprint identification region 201 to the non-fingerprint identification region 202 is greater than or equal to 3 mm and less than or equal to 5 mm. Specifically, the area of the non-fingerprint identification area 202 is increased along with the increase of the width d1, so that the volume of the fingerprint identification module 20 is increased, which is not favorable for the light and thin display panel 500. Set up width d1 to be more than or equal to 3 millimeters, and be less than or equal to 5 millimeters, both guaranteed that frame glue 30 and second base plate 210 and first base plate 110 have great area of contact, thereby stronger adhesive strength has, the stability of the laminating of fingerprint identification module 20 with array substrate 10 has been guaranteed, can prevent fingerprint reflection light L2 again and leak by frame glue 30 department better, and still guaranteed that fingerprint identification module 20 has less volume, occupy less space, can not influence display panel's other structures after laminating with array substrate 10, can adapt to the demand that display panel 500 miniaturized betterly.
In the above technical solutions, the specific structure of the sealant 30 may be various, and with reference to fig. 1, a specific example is that the cross-sectional shape of the sealant 30 perpendicular to the second substrate 210 is a rectangle. By the arrangement, the frame glue 30 is ensured to have larger contact areas with the first substrate 110 and the second substrate 210 respectively, so that the attaching stability of the fingerprint identification module 20 and the array substrate 10 is ensured.
Fig. 2 is a schematic diagram of another display panel according to an embodiment of the present invention. Referring to fig. 2, a difference from the above technical solution is that the cross-sectional shape of the sealant 30 perpendicular to the second substrate 210 is a trapezoid, and the bottom of the trapezoid with a larger size is adjacent to the array substrate 10.
Specifically, because light L2 that is reflected back by finger 40 can be thrown to each direction, some gets into fingerprint identification unit 220, another part can be cast and seal frame glue 30, take place reflection or refraction etc. between frame glue 30 and fingerprint identification unit 220, because it is strongest to close on one side light L2 of array substrate 10 at frame glue 30, it is the biggest to take place the possibility of light leak in frame glue 30 department, close on array substrate 10 through setting up the great end of trapezoidal size and guaranteed that light L2 can not leak in frame glue 30 department, in addition, the less end of trapezoidal size closes on second substrate 210, make the non-fingerprint identification region 202 of second substrate 210 need not too big, thereby be favorable to reducing the volume of fingerprint identification module 20, reduce the space that fingerprint identification module 20 occupies in display panel, be favorable to realizing display panel's frivolousness.
It should be noted that fig. 2 exemplarily shows a trapezoidal cross-sectional shape of the sealant 30, which is not a limitation of the present invention, and the trapezoid may be an isosceles trapezoid or a non-isosceles trapezoid, and may be set as needed. In addition, fig. 1 and 2 only show the case that the cross-sectional shape of the sealant 30 is rectangular or trapezoidal, which is not a limitation of the present invention, and in other embodiments, the cross-sectional shape of the sealant 30 may be a circle, an ellipse, or another polygon as needed, or may be a combination shape of one or more of a circle, an ellipse, a rectangle, and a trapezoid.
Fig. 3 is a schematic view of another display panel according to an embodiment of the present invention, and optionally, referring to fig. 3, a cross-sectional shape of the sealant 30 perpendicular to the second substrate 210 is a hexagon, where the hexagon is a combined shape of two trapezoids. Wherein the larger bases of the two trapezoids are adjacent to the first substrate 110 and the second substrate 210, respectively. By the arrangement, the frame glue 30, the first substrate 110 and the second substrate 210 are ensured to have larger contact areas respectively, so that the laminating stability of the fingerprint identification module 20 and the array substrate 10 is ensured, the frame glue 30 occupies smaller volume, more spaces are reserved for other structures of the display panel, and the miniaturization and the lightness of the display panel are facilitated.
Fig. 4 is a schematic diagram of another display panel according to an embodiment of the present invention. Referring to fig. 4, optionally, the fingerprint identification unit 220 includes a collimating panel 221 and a plurality of light sensors 223, and the collimating panel 221 is disposed at a side of the plurality of light sensors 223 adjacent to the array substrate 10.
Specifically, the light sensor 223 is a sensor that converts received light signals with different intensities into different electrical signals, and due to the difference in intensity of the light L2 reflected at the ridges and valleys of the fingerprint, the light sensor 223 can convert the light with different intensities into a multi-gray fingerprint image, thereby implementing fingerprint identification. FIG. 5 is a schematic structural diagram of a light sensor according to an embodiment of the present invention; fig. 6 is a schematic diagram of a film layer of a light sensor according to an embodiment of the invention. Alternatively, referring to fig. 5 and 6, the photo sensor 223 includes a photodiode D, a storage capacitor C, and a thin film transistor T; the anode D1 of the photodiode D is electrically connected with the first electrode of the storage capacitor C, and the cathode D2 of the photodiode D is electrically connected with the second electrode of the storage capacitor C and the source Ts of the thin film transistor T; a grid electrode Tg of the thin film transistor T is electrically connected with a switch control line Gate, and a drain electrode Td is electrically connected with a signal detection line Data; the photodiode D is used to convert light reflected by a touch subject (fingerprint) into a current signal.
Referring to fig. 6, the photodiode D includes a PIN junction D3 between the anode D1 and the cathode D2. Among them, the PIN junction D3 is composed of a P-type semiconductor, an N-type semiconductor, and an intrinsic semiconductor (I-type layer) between the P-type semiconductor and the N-type semiconductor. The PIN junction D3 is the light sensing portion of the photodiode D. Specifically, the cathode D2 is formed of opaque metal, and the boundary of the PIN junction D3 does not exceed the boundary of the cathode D2. PIN junction D3 has photosensitive properties and has unidirectional conductivity. In the absence of illumination, the PIN junction D3 has a small saturation reverse leakage current, i.e., dark current, when the photodiode D is turned off. When the PIN junction D3 is illuminated, the saturation reverse leakage current of the PIN junction D3 is greatly increased, and a photocurrent is formed and changes along with the change of the incident light intensity.
Illustratively, the principle of fingerprint recognition is explained in detail in conjunction with fig. 4, 5 and 6. During the fingerprint recognition phase, the node H1 inputs a low voltage signal (e.g., a constant voltage signal having a magnitude of-5V), and the signal line Data inputs a high voltage signal (e.g., a constant voltage signal having a magnitude of 1.5V). The whole fingerprint identification stage comprises a preparation stage, a fingerprint signal acquisition stage and a fingerprint signal detection stage. In the preparation stage, a driving chip (not shown in fig. 4, 5 and 6) electrically connected to the photo sensor 223 controls the thin film transistor T of the photo sensor 223 to be turned on through the switch control line Gate, and the storage capacitor C is charged until the storage capacitor C is charged. In the fingerprint signal collection stage, the thin film transistor T of the light sensor 223 is controlled to be turned off by the switch control line Gate. When the user presses a finger on the display panel 500, the light emitted from the pixel unit 120 is irradiated to the finger and reflected by the surface of the finger 40 to form a reflected light. The reflected light L2 reflected by the finger 40 is incident on the photo sensor 223, is received by the photodiode D of the photo sensor 223, and forms a photocurrent whose direction is from the node H2 to the node H1, so that the potential of the node H2 changes. In the fingerprint signal detection stage, the potential variation of the node H2 can be directly detected, so as to determine the magnitude of the photocurrent.
Referring to fig. 4, the collimating panel 221 functions to make the light sensor 223 more receive the light collimated in the light L2 reflected from the finger 40, for example, in fig. 4, in the light L2 reflected from the valley line of the finger 40, the collimated light L21 may pass through the collimating panel 221, and the divergent light L22 may not pass through the collimating panel 221. Therefore, the arrangement of the collimation panel 221 is beneficial for the light sensor 223 to receive only the reflected light of the fingerprint at the position corresponding to the light sensor 223, and the fingerprint identification accuracy is enhanced.
With continued reference to fig. 4, an optical glue layer 222 may also be disposed between the collimating panel 221 and the plurality of light sensors 223. The optical adhesive layer 222 is helpful for attaching the collimating panel 221 to the light sensor 223, so as to fix the position of the collimating panel 221, so that the light sensor 223 can accurately receive the light emitted from the collimating panel 221, and the accuracy of the light sensor 223 in receiving the light is improved.
On the basis of the above technical solutions, optionally, the collimating panel 221 is a fiber optic panel. The optical fiber panel has the advantage of passing the light efficiency height and passing the image clarity, sets up collimation panel 221 as the accuracy that the optical fiber panel helps promoting the fingerprint identification of fingerprint identification module 20.
In the above technical solutions, the sealant 30 may be a flowing sealant or a hard sealant. The hard glue may be, for example, foam cotton or Polyethylene terephthalate (PET) double sided tape. The foam has the advantages that: has elasticity, light weight and reliable performance. The foam adhesive using foam as a base material has the advantages of excellent sealing property, compression deformation resistance, flame retardance, wettability and the like. The PET double faced adhesive tape has the advantages of good mechanical property, high temperature resistance, low temperature resistance and low gas and water vapor permeability. Therefore, the sealant 30 can improve the sealing performance, the light shielding performance and the buffering performance of the fingerprint identification module 20 by using foam adhesive or PET double-sided adhesive.
On the basis of the above technical solutions, the second substrate 210 is a driving circuit board of the fingerprint identification unit 220. The fingerprint identification unit 220 is in direct contact with the driving circuit board, so that the length of a connecting lead between the fingerprint identification unit 220 and the driving circuit board is reduced, and the interference possibly suffered by the connecting lead in the transmission process is further reduced.
The embodiment of the invention also provides a display device. Fig. 7 is a schematic diagram of a display device according to an embodiment of the present invention, and referring to fig. 7, the display device 400 includes a display panel 500 according to any embodiment of the present invention.
In the display device 400 provided by the embodiment of the invention, the sealant is disposed in the non-fingerprint identification region, the sealant surrounds the fingerprint identification region, and one side of the sealant, which is away from the second substrate, is bonded with the first substrate, so that the surface of the fingerprint identification unit, which is away from the second substrate, is bonded with the first substrate. The frame glue is arranged in such a way, so that the light leakage preventing effect and the buffering effect are achieved, and the fingerprint identification unit and the first substrate are fixedly attached. Compared with the prior art, the setting that adopts the OCA layer between fingerprint identification module and array substrate has been saved. Therefore, the technical scheme provided by the invention enhances the transmittance of the light reflected by the finger, namely, the light transmittance of the fingerprint identification module is enhanced. In addition, the omission of the OCA layer also reduces the thickness of the display device 400, which is beneficial to realizing the lightness and thinness of the display device 400; in the manufacturing process of the display device 400, the OCA coating and defoaming processes are omitted, the manufacturing process of the display device 400 is simplified, and the manufacturing cost of the display device 400 is reduced.
The embodiment of the invention also provides a manufacturing method of the display panel. Fig. 8 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention. Referring to fig. 8, the method for manufacturing the display panel includes:
s110, providing an array substrate. The array substrate comprises a first substrate and a plurality of pixel units positioned on the first substrate.
S120, providing a fingerprint identification module. Wherein, fingerprint identification module includes the second base plate, and the surface that the second base plate closes on the array substrate includes fingerprint identification region and around the regional non-fingerprint identification region of fingerprint identification, and fingerprint identification region is provided with the fingerprint identification unit.
And S130, arranging frame glue in the non-fingerprint identification area, wherein the frame glue surrounds the fingerprint identification area.
And S140, bonding one side of the frame glue, which is far away from the second substrate, with one side of the first substrate, which is far away from the pixel unit, so that the surface of the fingerprint identification unit, which is far away from the second substrate, is bonded with the first substrate.
In the method for manufacturing the display panel, the frame glue is arranged in the non-fingerprint identification area, the frame glue surrounds the fingerprint identification area, one side of the frame glue, which is far away from the second substrate, is bonded with the first substrate, and the surface of the fingerprint identification unit, which is far away from the second substrate, is bonded with the first substrate. The frame glue is arranged in such a way, so that the light leakage preventing effect and the buffering effect are achieved, and the fingerprint identification unit and the first substrate are fixedly attached. Compared with the prior art, the setting that adopts the OCA layer between fingerprint identification module and array substrate has been saved. Therefore, the technical scheme provided by the invention enhances the transmittance of the light reflected by the finger, namely, the light transmittance of the fingerprint identification module is enhanced. In addition, the thickness of the display panel is reduced by omitting the OCA layer, and the light and thin display panel is facilitated to be realized; in the manufacturing process of the display panel, OCA coating and defoaming processes are omitted, the manufacturing process of the display panel is simplified, and the manufacturing cost of the display panel is further reduced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display panel, comprising:
the array substrate is used for displaying images and comprises a first substrate and a plurality of pixel units positioned on the first substrate;
the fingerprint identification module is arranged on one side, far away from the pixel unit, of the first substrate;
the fingerprint identification module comprises a second substrate, wherein the surface of the second substrate close to the array substrate comprises a fingerprint identification area and a non-fingerprint identification area surrounding the fingerprint identification area; the fingerprint identification area is provided with a fingerprint identification unit;
the non-fingerprint identification area is provided with frame glue, the frame glue surrounds the fingerprint identification area, one side of the frame glue, which is far away from the second substrate, is bonded with the first substrate, so that the surface, which is far away from the second substrate, of the fingerprint identification unit is bonded with the first substrate; the cross section of the frame glue perpendicular to the second substrate is trapezoidal, and the bottom with larger trapezoidal size is close to the array substrate, or the cross section of the frame glue perpendicular to the second substrate is hexagonal, the hexagonal shape is a combined shape of two trapezoids, wherein the two bottoms with larger trapezoidal size are respectively close to the first substrate and the second substrate.
2. The display panel according to claim 1, characterized in that:
the width of the frame glue along the direction from the fingerprint identification area to the non-fingerprint identification area is greater than or equal to 3 mm.
3. The display panel according to claim 2, characterized in that:
the width of the frame glue along the direction from the fingerprint identification area to the non-fingerprint identification area is greater than or equal to 3 millimeters and less than or equal to 5 millimeters.
4. The display panel according to claim 1, characterized in that:
the fingerprint identification unit comprises a collimation panel and a plurality of light sensation sensors, and the collimation panel is arranged on one side, close to the array substrate, of the light sensation sensors.
5. The display panel according to claim 4, wherein:
an optical adhesive layer is arranged between the collimation panel and the plurality of light sensation sensors.
6. The display panel according to claim 4, wherein:
the collimating panel is a fiber optic panel.
7. The display panel according to claim 1, characterized in that:
the frame glue is foam cotton glue or polyethylene terephthalate (PET) double-sided glue.
8. The display panel according to claim 1, characterized in that:
the second substrate is a driving circuit board of the fingerprint identification unit.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
10. A method for manufacturing a display panel is characterized by comprising the following steps:
providing an array substrate, wherein the array substrate is used for displaying images and comprises a first substrate and a plurality of pixel units positioned on the first substrate;
providing a fingerprint identification module, wherein the fingerprint identification module comprises a second substrate, the surface of the second substrate close to the array substrate comprises a fingerprint identification area and a non-fingerprint identification area surrounding the fingerprint identification area, and the fingerprint identification area is provided with a fingerprint identification unit;
arranging frame glue in the non-fingerprint identification area, wherein the frame glue surrounds the fingerprint identification area;
bonding one side of the frame glue, which is far away from the second substrate, with one side of the first substrate, which is far away from the pixel unit, so that the surface of the fingerprint identification unit, which is far away from the second substrate, is bonded with the first substrate; the cross section of the frame glue perpendicular to the second substrate is trapezoidal, and the bottom with larger trapezoidal size is close to the array substrate, or the cross section of the frame glue perpendicular to the second substrate is hexagonal, the hexagonal shape is a combined shape of two trapezoids, wherein the two bottoms with larger trapezoidal size are respectively close to the first substrate and the second substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101237.7A CN108334841B (en) | 2018-02-01 | 2018-02-01 | Display panel, display device and manufacturing method of display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101237.7A CN108334841B (en) | 2018-02-01 | 2018-02-01 | Display panel, display device and manufacturing method of display panel |
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| Publication Number | Publication Date |
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| CN108334841A CN108334841A (en) | 2018-07-27 |
| CN108334841B true CN108334841B (en) | 2021-03-30 |
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| CN109147593A (en) * | 2018-08-31 | 2019-01-04 | Oppo广东移动通信有限公司 | Display component and electronic equipment |
| CN108957816B (en) * | 2018-09-14 | 2021-03-30 | Oppo（重庆）智能科技有限公司 | Display screen assembly, display device and driving method thereof |
| CN109643377A (en) * | 2018-11-19 | 2019-04-16 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN109614961B (en) * | 2019-01-24 | 2020-12-15 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN109886224B (en) | 2019-02-27 | 2021-03-30 | 京东方科技集团股份有限公司 | Display module, display device and manufacturing method thereof |
| CN111666781B (en) * | 2019-03-05 | 2024-05-10 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN113539061B (en) * | 2020-04-21 | 2023-06-30 | Oppo广东移动通信有限公司 | Induction component and electronic device |
| CN113792571B (en) * | 2020-08-17 | 2024-03-08 | 友达光电股份有限公司 | Fingerprint sensing module |
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