CN110221466B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN110221466B
CN110221466B CN201910357129.0A CN201910357129A CN110221466B CN 110221466 B CN110221466 B CN 110221466B CN 201910357129 A CN201910357129 A CN 201910357129A CN 110221466 B CN110221466 B CN 110221466B
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China
Prior art keywords
light
display panel
substrate
sensing unit
projection
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CN201910357129.0A
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Chinese (zh)
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CN110221466A (en
Inventor
郑斌义
王海亮
吴玲
沈柏平
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • 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
    • 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 invention discloses a display panel and a display device. The display panel includes: the array substrate and the color film substrate are oppositely arranged; the light sensation identification assembly comprises at least one light sensation unit and at least one upper collimation hole; the array substrate comprises a first substrate and a light sensing unit positioned on one side of the first substrate close to a color film substrate, the color film substrate is provided with an upper collimating hole, and the upper collimating hole and the light sensing unit are dislocated in the direction vertical to the display panel; the display panel further comprises a light scattering structure, and the light scattering structure is located on one side, far away from the light sensing unit, of the first substrate. The invention can ensure the sensitivity of the light sensing unit detection and the accuracy of fingerprint identification detection.

Description

Display panel and display device
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the development of science and technology, a variety of display devices with fingerprint identification functions appear in the market, such as mobile phones, tablet computers, intelligent wearable devices and the like. The fingerprint is unique for every person, and the safety factor of the display device can be improved by adopting the fingerprint identification function.
The existing fingerprint identification technology is divided into capacitive fingerprint identification and optical fingerprint identification, and the integration of the optical fingerprint identification in a display panel to realize the fingerprint identification in a display area of the display panel is a hot point of current research. At present, the research on the organic light-emitting display panel applied by the fingerprint identification technology is mature, and the research on applying the light-sensitive fingerprint identification technology in the liquid crystal display panel screen is still rare.
Therefore, it is an urgent technical problem in the art to provide a display device of a display panel capable of implementing light sensing fingerprint identification in a liquid crystal display screen and ensuring the accuracy of fingerprint identification detection.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which solve the problem of implementing light-sensing fingerprint identification in a liquid crystal display and ensure the accuracy of fingerprint identification detection.
In order to solve the above technical problem, a first aspect of the present invention provides a display panel including:
the array substrate and the color film substrate are oppositely arranged;
the light sensation identification assembly comprises at least one light sensation unit and at least one upper collimation hole; the array substrate comprises a first substrate and a light sensing unit positioned on one side of the first substrate close to the color film substrate,
the color film substrate is provided with an upper collimating hole, and the upper collimating hole and the light sensing unit have dislocation in the direction vertical to the display panel;
the display panel further comprises a light scattering structure, and the light scattering structure is located on one side, far away from the light sensing unit, of the first substrate.
In a second aspect, the present invention further provides a display device including any one of the display panels provided by the present invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
according to the display panel, the light scattering structure is arranged on the side, away from the color film substrate, of the array substrate, the light scattering structure can scatter light, and the fact that the light which can be totally reflected on the light emergent surface of the display panel exists in the light which enters the display panel is guaranteed. The fingerprint identification assembly comprising at least one upper collimating hole and one light sensing unit is used as a structure for fingerprint identification detection in a fingerprint identification stage, and the upper collimating hole and the light sensing unit are dislocated in the direction perpendicular to the display panel. In the fingerprint identification detection stage, when the light for fingerprint identification detection irradiates the position of the valley of the fingerprint, the light can be irradiated on the light sensing unit through the upper collimating hole after being totally reflected on the light emergent surface; when the light for fingerprint identification detection irradiates the position of the ridge of the fingerprint, the light can be reflected on the light emergent surface and then irradiates the light sensing unit through the upper collimating hole. The light sensing unit identifies valleys and ridges of the fingerprint according to the intensity of the detected light signal. The light used for fingerprint identification detection does not need to penetrate through the light emergent surface back and forth, and the light loss is less, so that the light quantity used for fingerprint detection is larger, and the detection sensitivity of the light sensing unit can be ensured. In addition, the display panel provided by the invention does not need to increase the size of the upper collimating hole and the size of the light sensing unit in order to increase the light quantity of fingerprint detection in the related art, and the design of the invention does not increase the signal-to-noise ratio and can ensure the precision of fingerprint detection.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a diagram illustrating a film structure of a display panel according to the related art;
FIG. 2 is a schematic diagram of a film structure of an alternative embodiment of a display panel according to the present invention;
FIG. 3 is a schematic diagram of another optical path of the display panel provided by the present invention during a fingerprint recognition stage;
FIG. 4 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to the present invention;
FIG. 5 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to the present invention;
FIG. 6 is a schematic top view of a portion of the display panel shown in FIG. 5;
FIG. 7 is a schematic top view of a portion of an alternative embodiment of a display panel according to the present invention;
FIG. 8 is a schematic top view of another alternative embodiment of a display panel according to the present invention;
FIG. 9 is a schematic top view of another alternative embodiment of a display panel according to the present invention;
FIG. 10 is a simplified cross-sectional view taken along line A-A' of FIG. 8;
FIG. 11 is a schematic top view of a portion of another alternative embodiment of a display panel in accordance with the present invention;
FIG. 12 is a simplified cross-sectional view taken along line B-B' of FIG. 11;
FIG. 13 is a schematic top view of a portion of another alternative embodiment of a display panel in accordance with the present invention;
FIG. 14 is a simplified cross-sectional view taken along line C-C' of FIG. 13;
FIG. 15 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to the present invention;
FIG. 16 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to the present invention;
FIG. 17 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to the present invention;
fig. 18 is a schematic view of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of a film structure of a display panel in the related art. As shown in fig. 1, the display panel includes an array substrate 101', a color filter substrate 102', and a liquid crystal layer 103', wherein a collimating layer Z ' is disposed on the color filter substrate 102', an opening K ' is disposed on the collimating layer Z ', and a photo sensing unit S ' is disposed at a position corresponding to the opening K ' in a direction perpendicular to the display panel. In the fingerprint identification stage, a backlight source of the display panel is used as a fingerprint identification light source, and light sequentially penetrates through the array substrate 101', the liquid crystal layer 103' and the color film substrate 102 'to reach the outer surface M' of the display panel. When a finger touches the fingerprint identification area, the ridge W1' of the fingerprint is in contact with the outer surface M ' of the display panel, an air medium exists between the valley W2' of the fingerprint and the outer surface M ' of the display panel, light reaching the outer surface M ' of the display panel penetrates through the display panel to irradiate the ridge of the fingerprint and the valley of the fingerprint, and then the light is reflected at the positions where the ridge of the fingerprint and the valley of the fingerprint are located respectively. Only the light path of the light reflected by the valley W2' of the fingerprint to the light sensing unit S ' through the opening K ' is illustrated in fig. 1. Actually, in the fingerprint identification stage, light needs to first penetrate through the display panel to irradiate the valleys and ridges of the fingerprint, and then the light is reflected by the valleys or ridges of the fingerprint and then penetrates through a part of the film layer of the display panel again to reach the light sensing unit, and when the light penetrates through the outer surface of the display panel (usually, a glass cover plate), a large amount of light is lost, so that the amount of light that can be utilized in fingerprint identification detection is small, and in the case of small amount of light, the sensitivity of the light sensing unit in detection is low. In the related art, in order to ensure that a sufficient amount of light can be used for fingerprint identification detection, a design manner of increasing the size of the opening and the size of the light sensing unit is generally adopted, but such a design may result in a large fingerprint detection area corresponding to one opening (i.e. a large fingerprint detection area corresponding to one light sensing unit), and when a finger touches the fingerprint detection area, the fingerprint detection area may result in a situation that the detection area includes one valley and one ridge at the same time, or includes two valleys and one ridge at the same time, or includes two ridges and one valley at the same time, and the like. That is, due to the increase of the size of the opening, the light signal detected by the light sensing unit includes both the light reflected by the valleys of the fingerprint and the light reflected by the ridges of the fingerprint, resulting in an increase of the signal-to-noise ratio and a decrease of the accuracy of fingerprint detection. Based on this, the inventor researches and provides a display panel and display device, through adopting the light that total reflection light detected as fingerprint identification, can be favorable to improving the light quantity that is used for fingerprint identification, has guaranteed the sensitivity that the light sense unit detected, need not increase the fingerprint detection region that a light sense unit corresponds simultaneously, can guarantee the fingerprint detection accuracy.
Fig. 2 is a schematic diagram of a film structure of an alternative embodiment of a display panel provided in the present invention. As shown in fig. 2, the display panel includes: the array substrate 101 and the color film substrate 102 are arranged oppositely; optionally, the liquid crystal display device further includes a liquid crystal layer 103 between the position array substrate 101 and the color filter substrate 102. The array substrate 101 includes a plurality of thin film transistors (not shown) as switching devices of sub-pixels in the display panel. The color filter substrate 102 includes a black matrix and a color resistor (not shown), where the color resistor includes a red resistor, a green resistor, and a blue resistor, and optionally may also include a white resistor. The light sensing identification component GZ comprises at least one light sensing unit S and at least one upper collimation hole K1, the light sensing unit S and the upper collimation hole K1 in one light sensing identification component GZ in the application can be matched with each other to realize light sensing fingerprint identification detection of a certain area, and optionally, the light sensing unit S is a photodiode and can be a PIN junction or a PN junction; the array substrate 101 includes a first substrate 1011 and a photo sensor unit S located on one side of the first substrate 1011 close to the color filter substrate 102, the color filter substrate 102 is provided with an upper collimating hole K, and the upper collimating hole K1 and the photo sensor unit S are dislocated in a direction e perpendicular to the display panel, wherein a collimating layer (i.e., a light shielding layer) may be disposed in the color filter substrate 102, and an opening is formed in the collimating layer to form an upper collimating hole K1. The dislocation between the upper collimating hole K1 and the photosensitive cell S in the present application includes: in the direction e perpendicular to the display panel, the upper collimating holes K1 are not overlapped with the light sensing units S at all, and only partial areas of the upper collimating holes K are overlapped with the light sensing units S, and only one misalignment is illustrated in fig. 2. With continued reference to fig. 2, the display panel further includes a light scattering structure 104, and the light scattering structure 104 is located on a side of the first substrate 1011 away from the light sensing unit S. It should be noted that only one light-sensing identification assembly is illustrated in fig. 2, the display panel provided by the present invention includes a plurality of light-sensing identification assemblies, and the plurality of light-sensing identification assemblies may be optionally arranged in an array. The light sensation identification assembly can be arranged on the local part of the display panel to realize that the local part of the display area has the light sensation fingerprint identification function, or the light sensation identification assembly can be arranged on the whole surface of the display panel to realize that the whole surface of the display area has the light sensation fingerprint identification function.
The display panel provided by the invention is a liquid crystal display panel, a backlight source is needed to realize display, one side of an array substrate 101, which is far away from a color film substrate 102, in the display panel is a light inlet side, a light scattering structure 104 is arranged on the light inlet side of the display panel, light emitted by the backlight source to the display panel is subjected to light scattering treatment by the light scattering structure 104, the propagation direction of the light is changed, namely the light entering the display panel comprises light propagating in multiple directions, wherein the light comprises light forming a large incident angle with a light outlet surface M1 of the display panel, the light outlet surface M1 is the outer surface of one side of the display surface of the display panel, the light outlet surface M1 can also be understood as a surface in finger contact in a fingerprint identification stage, and optionally, the light outlet surface M1 is the outer surface of a glass cover plate of the display panel. When the incident angle θ of the light emitted to the light emitting surface M1 is greater than or equal to the critical angle α of total reflection of the light emitted to the light emitting surface M1, the light is totally reflected at the light emitting surface M1, that is, there is a portion of the light that propagates only inside the display panel and does not exit to the outside of the display panel. The invention utilizes the light which can be totally reflected on the light-emitting surface M1 of the display panel as the light for fingerprint identification detection.
Referring to the illustration in fig. 2, in the fingerprint identification stage, there is a light G1 with an incident angle θ (θ ≧ α) emitted to the light exit surface M1 inside the display panel, when a finger touches the light exit surface M1 of the display panel, the light G1 irradiates the position of the valley W2 of the fingerprint, because there is air between the valley W2 of the fingerprint and the light exit surface M1, the interface property of the light exit surface M1 in contact with air at the position is unchanged, and the light G1 irradiates the light sensing unit S through the upper collimating hole K1 after being totally reflected by the light exit surface M1, and is detected by the light sensing unit S. The light ray G1 has total reflection action on the light-emitting surface M1, so that the light ray for fingerprint detection does not need to penetrate through the light-emitting surface, namely, the light quantity for fingerprint detection is larger, and the detection sensitivity of the light sensing unit can be ensured.
Referring to the illustration in fig. 3, fig. 3 is another schematic diagram of the optical path of the display panel provided in the present invention during the fingerprint identification stage. In the fingerprint identification stage, a light ray G2 with an incident angle theta (theta is larger than or equal to alpha) is emitted to the light-emitting surface M1 in the display panel, when a finger touches the light-emitting surface M1 of the display panel, the light ray G2 irradiates the position of the ridge W1 of the fingerprint, because the ridge W1 of the fingerprint is in direct contact with the light-emitting surface M1, the contact interface of the light-emitting surface M1 and the air at the position is changed into the contact interface of the light-emitting surface M1 and the ridge W1 of the fingerprint, and because the refractive index of the ridge W1 of the fingerprint is larger than that of the air, total reflection does not occur at the position any more, and reflection and refraction occur at the same time. In the process, only part of the light for fingerprint identification detection exits from the light exit surface M1 to the outside of the display panel, and the light for fingerprint detection does not pass through the light exit surface M1 back and forth many times. The amount of light used for fingerprint detection is large, and the sensitivity of the light sensing unit detection can be ensured.
The invention uses the light which can be totally reflected on the light-emitting surface when the light is emitted to the light-emitting surface from the display panel as the light for fingerprint identification and detection. In the fingerprint identification stage, at the position of the valley of the fingerprint, the light is detected by the light sensing unit after being totally reflected in the display panel; at the position of the ridge of the fingerprint, the light can be reflected and refracted at the same time, and only the reflected light is detected by the light sensing unit, namely, the light can cause certain light loss at the position of the ridge of the fingerprint. Therefore, the light quantity reflected by the positions of the valleys of the fingerprint is different from the positions of the ridges of the fingerprint, and the light sensing unit can identify the valleys and the ridges of the fingerprint according to the difference of the detected light quantity.
According to the display panel, the light scattering structure is arranged on the side, away from the color film substrate, of the array substrate, the light scattering structure can scatter light, and the fact that the light which can be totally reflected on the light emergent surface of the display panel exists in the light which enters the display panel is guaranteed. The fingerprint identification assembly comprising at least one upper collimating hole and one light sensing unit is arranged to serve as a structure for fingerprint identification detection in a fingerprint identification stage. In the fingerprint identification detection stage, when the light for fingerprint identification detection irradiates the position of the valley of the fingerprint, the light can be irradiated on the light sensing unit through the upper collimating hole after being totally reflected on the light emergent surface; when the light for fingerprint identification detection irradiates the position of the ridge of the fingerprint, the light can be reflected on the light emergent surface and then irradiates the light sensing unit through the upper collimating hole. The light sensing unit identifies valleys and ridges of the fingerprint according to the intensity of the detected light signal. The light used for fingerprint identification detection does not need to penetrate through the light emergent surface back and forth, and the light loss is less, so that the light quantity used for fingerprint detection is larger, and the detection sensitivity of the light sensing unit can be ensured. In addition, the display panel provided by the invention does not need to increase the size of the upper collimating hole and the size of the light sensing unit in order to increase the light quantity of fingerprint detection in the related art, and the design of the invention does not increase the signal-to-noise ratio and can ensure the precision of fingerprint detection.
In an embodiment, fig. 4 is a schematic view of a film structure of another alternative embodiment of a display panel provided in the present invention. As shown in fig. 4, the light sensing module GZ further includes a lower alignment hole K2, the lower alignment hole K2 is located on a side of the light sensing unit S away from the first substrate 1011, and an orthogonal projection of the lower alignment hole K2 on a plane of the light sensing unit S overlaps the light sensing unit S in a direction perpendicular to the display panel e. Alternatively, as shown in the figure, the lower collimating hole K2 is located on the array substrate 101, and a light shielding layer may be formed on the light sensing unit S of the array substrate 101, and an opening may be formed on the light shielding layer to form the lower collimating hole K2. Fig. 4 is a cross-sectional view of the display panel, and does not show the orthographic projection position of the lower collimating hole K2 on the plane of the light sensing unit S, it can be understood that the projection direction is the direction e in the figure, and the orthographic projection of the lower collimating hole K2 on the plane of the light sensing unit S overlaps the light sensing unit S, which means that the lower collimating hole K2 exposes the light sensing unit S, and light can penetrate through the lower collimating hole K2 to irradiate the light sensing unit S. Since the upper collimating hole K1 and the photo sensing unit S are dislocated in the direction perpendicular to the display panel e, the upper collimating hole K1 and the lower collimating hole K2 are also dislocated in the present invention, i.e. the upper collimating hole K1 and the lower collimating hole K2 form obliquely corresponding collimating hole groups. In the fingerprint identification stage, taking the fingerprint identification area corresponding to the light sensing identification component GZ as the valley of the fingerprint in fig. 4 as an example, the light used for fingerprint detection is totally reflected at the light exit surface M1 corresponding to the valley of the fingerprint, and then sequentially passes through the upper collimating hole K1 and the lower collimating hole K2 to reach the light sensing unit S, and is detected by the light sensing unit S. Light used for fingerprint identification detects among this embodiment need not make a round trip to penetrate the light-emitting surface, and light loss is few to the light quantity that is used for fingerprint detection is great, can guarantee the sensitivity that light sense unit detected. The design of the invention can not increase the signal-to-noise ratio and can ensure the precision of fingerprint detection. In addition, the dislocation design of collimation hole and lower collimation hole in the setting simultaneously, light need pierce through collimation hole and lower collimation hole simultaneously and just can reach the light sense unit on, has guaranteed the collimation nature that is used for the light of fingerprint detection.
In some optional embodiments, the light sensing identification component further comprises a middle collimating hole, and the middle collimating hole is located between the upper collimating hole and the lower collimating hole in the direction perpendicular to the display panel. The number of the center collimating holes included in one light-sensitive identification component is not limited in the invention. The middle collimating holes may be formed in the array substrate, the color film substrate, or both the array substrate and the color film substrate.
In an embodiment, a central alignment hole is provided in a color filter substrate. Fig. 5 is a schematic diagram of a film structure of another alternative embodiment of the display panel provided in the present invention. Fig. 6 is a partial top view of the display panel provided in fig. 5.
As shown in fig. 5, the light sensing identification assembly GZ further includes at least one middle alignment hole K3, and the middle alignment hole K3 is located between the upper alignment hole K1 and the lower alignment hole K2 in the vertical and display panel direction e. As shown in fig. 6, an orthographic projection of the upper collimating hole K1 on the first substrate 1011 is a first projection P1, an orthographic projection of the lower collimating hole K2 on the first substrate is a second projection P2, and an orthographic projection of the middle collimating hole K3 on the first substrate is a third projection P3; in one light sensation recognition component GZ: the geometric center O1 of the first projection P1, the geometric center O2 of the second projection P2, and the geometric center O3 of the third projection P3 are located on the same straight line X. Since the orthogonal projection direction of each collimating hole onto the first substrate 1011 is the same as the direction of the plan view angle, the upper collimating hole K1 coincides with the first projection P1, the lower collimating hole K2 coincides with the second projection P2, and the middle collimating hole K3 coincides with the third projection P3 in plan view. The shape and size of each collimating hole in fig. 6 are only schematically shown, and are not intended to limit the present invention, and each collimating hole in the display panel provided by the present invention may have a circular, elliptical or rectangular shape. The light for fingerprint detection in the invention can be totally reflected on the light-emitting surface, and the angle of the incident angle of the light to the light-emitting surface is larger, so that the angle between the propagation direction of the reflected light for fingerprint detection and the direction e (namely the normal direction) vertical to the display panel is larger. In addition, in the fingerprint identification stage, light rays for fingerprint identification detection do not need to penetrate through the light emergent surface back and forth, and light loss is low, so that the light quantity for fingerprint detection is high, and the detection sensitivity of the light sensing unit can be ensured. In addition, the design of the invention can not increase the signal-to-noise ratio and can ensure the precision of fingerprint detection.
In an embodiment, fig. 7 is a schematic partial top view of an alternative implementation of a display panel provided in the present invention. As shown in fig. 7, in one light-sensing identification component: the orthographic projection of the upper collimation hole K1 on the first substrate 1011 is a first projection P1, the orthographic projection of the lower collimation hole K2 on the first substrate 1011 is a second projection P2, and the area of the second projection P2 is larger than or equal to the area of the first projection P1. That is, the size of the lower collimating hole K2 is equal to or larger than the size of the upper collimating hole K1, taking the case that each collimating hole is circular, that is, the diameter of the lower collimating hole K2 is equal to or larger than the diameter of the upper collimating hole K1. The figure illustrates the case where the area of the second projection P2 is larger than the area of the first projection P1. The upper collimation aperture K1 coincides with the first projection P1 and the lower collimation aperture K2 coincides with the second projection P2 in top view. Can refer to the membranous layer structure of the display panel that figure 4 corresponds simultaneously and understand, in the fingerprint identification stage, the light that is used for fingerprint detection needs to pass last collimation hole and lower collimation hole in proper order just can shine on the light sense unit, the size that sets up collimation hole more than or equal to in this embodiment is the size of last collimation hole down, can guarantee to pierce through the light that goes up the collimation hole also homoenergetic and pierce through down collimation hole and shine on the light sense unit, the size of avoiding lower collimation hole is less than the size of last collimation hole, lead to part to be used for the light that the fingerprint detected can not pierce through lower collimation hole after piercing through last collimation hole, the waste of light has been caused, lead to the light signal volume that the light sense unit received to reduce and influence the precision that the fingerprint detected.
In an embodiment, fig. 8 is a schematic top view of another alternative embodiment of a display panel provided in the present invention. As shown in fig. 8, includes a plurality of sub-pixels sp including an opening area Q; the opening regions Q are transparent regions of the sub-pixels sp, and the display panel further includes non-opening regions FQ surrounding the opening regions Q. An orthographic projection of the upper collimating hole K1 on the first substrate (not shown) is a first projection P1, an orthographic projection of the lower collimating hole K2 on the first substrate is a second projection P2, the upper collimating hole K1 coincides with the first projection P1 in top view, and the lower collimating hole K2 coincides with the second projection P2. In one light-sensing recognition component GZ, the first projection P1 and the second projection P2 are aligned along the first direction a, that is, in a top view, the upper alignment hole K1 and the lower alignment hole K2 are aligned along the first direction a; in the first direction a, the light sensing identification component GZ is located between the opening areas Q of two adjacent sub-pixels sp. The figure shows a case where a plurality of light sensing identification components GZ are arranged in an array. The display panel further includes a plurality of scan lines and data lines, wherein the first direction a may be an extending direction of the data lines, or may also be an extending direction of the scan lines. In the embodiment, the alignment holes arranged in the light sensation identification assembly are arranged along the first direction, so that the plane where the light path of the light rays capable of being used for fingerprint detection is located in the fingerprint identification stage is parallel to the first direction and is perpendicular to the display panel.
In another embodiment, fig. 9 is a schematic top view of another alternative embodiment of a display panel provided in the present invention. As shown in fig. 9, the upper alignment hole K1 and the lower alignment hole K2 in one light sensing member GZ are arranged in the first direction a in which the light sensing member GZ is located between the opening areas Q of the adjacent two sub-pixels sp in the top view. The display panel comprises a data line X2 extending along a second direction b, wherein the first direction a intersects with the second direction b, and an included angle between the first direction a and the second direction b is not 90 degrees. The arrangement directions of the upper collimating holes K1 and the lower collimating holes K2 in the plurality of light sensing identification assemblies GZ in the display panel may be the same or different, and are only schematically shown in the figure.
In one embodiment, the display panel includes a light-emitting surface, which is an outer surface of a display surface side of the display panel, and optionally, is an outer surface of the glass cover plate. In the fingerprint identification stage, the critical angle of total reflection of light emitted to the light emitting surface of the display panel is alpha; the orthographic projection of the upper collimating hole on the first substrate is a first projection, the orthographic projection of the lower collimating hole on the first substrate is a second projection, and in one light sensation identification assembly, the first projection and the second projection are arranged along a first direction. The display panel comprises a first section, wherein the first section is parallel to the first direction and is vertical to the plane of the display panel; taking the plane of the tangent line a-a 'in fig. 8 as an example of the first cross section, fig. 10 is a simplified schematic cross section at the position of the tangent line a-a' in fig. 8.
As shown in fig. 10, illustrating the light exit surface M1 of the display panel, in a first cross-section: the upper collimating hole K1 includes a first boundary point J1 and a second boundary point J2 opposite in a first direction a in whicha, the distance from the lower collimation hole K2 to the first boundary point J1 is smaller than the distance from the lower collimation hole K2 to the second boundary point J2; the lower collimating hole K2 includes a first light-transmitting region T having a third boundary point J3 and a fourth boundary point J4, in the first direction a, the distance from the third boundary point J3 to the upper collimating hole K1 is less than the distance from the fourth boundary point J4 to the upper collimating hole, and the distance from the third boundary point J3 to the first boundary point J1 is L; the first transparent region T is defined as a region of the lower collimating aperture K2 that can transmit light, and the size of the first transparent region T may be equal to the size of the lower collimating aperture K2, or the size of the first transparent region T may be smaller than the size of the lower collimating aperture K2. In the figure, the incident angle of the light G3 in the display panel to the light-emitting surface M1 is α, and the reflected light G3 passes through the third boundary point J3 of the first light-transmitting region T and then irradiates the light-sensing unit S, which is taken as an example
Figure BDA0002045764920000111
h is the spacing distance between the upper collimating hole K1 and the lower collimating hole K2 in the direction perpendicular to the display panel e, and the invention is provided with
Figure BDA0002045764920000112
That is, when the incident angle of the light in the display panel to the light exit surface M1 is not less than α, the light can pass through the first light transmission region T in the upper collimating aperture K1 and the lower collimating aperture K2 in sequence after being reflected, so that the fingerprint detection light utilized in the fingerprint identification stage of the present invention is the light capable of being totally reflected on the light exit surface, and thus, the light quantity of the fingerprint detection is ensured to be larger, and the detection sensitivity of the light sensing unit is ensured.
In an embodiment, fig. 11 is a schematic partial top view of another alternative embodiment of a display panel provided in the present invention. Fig. 12 is a simplified cross-sectional view at the position of line B-B' in fig. 11. As shown in fig. 11, an orthogonal projection of the upper collimating hole K1 on the first substrate 1011 is a first projection P1, an orthogonal projection of the photo sensing unit S on the first substrate 1011 is a fourth projection P4, the first projection P1 and the fourth projection P4 are aligned along the first direction a, and the first projection P1 and the fourth projection P4 do not overlap. Since the top view direction is the same as the projection direction, the collimating hole K1 overlaps the first projection P1 and the light sensing unit S overlaps the fourth projection P4 in the top view. The shapes and sizes of the upper collimating hole K1 and the light sensing unit S are only schematically shown in the drawings.
The display panel comprises a fingerprint identification area, wherein one upper collimation hole K1 corresponds to one fingerprint identification area, and the fingerprint identification area is an area which can be detected by the fingerprint identification component corresponding to the upper collimation hole K1. The display panel comprises a first section, wherein the first section is parallel to the first direction a and is vertical to the plane of the display panel; taking the plane of the tangent line B-B' in fig. 11 as an example of the first cross section, as shown in fig. 12, the fingerprint identification area Z corresponding to the upper collimating aperture K1 is illustrated;
in the first cross section: in the direction e perpendicular to the display panel, the distance from the light sensing unit S to the upper collimating hole K1 is Y1, and the distance from the light sensing unit S to the light emitting surface M1 of the display panel is Y2; in a first direction a: the length of the light sensing unit S is m, the length of the upper collimation hole K1 is D, the distance from the light sensing unit S to the upper collimation hole K1 is X1, the length of the fingerprint identification area Z is D, and the distance from the light sensing unit S to the fingerprint identification area Z is X2; Δ EFG and Δ EHK are similar as shown, then
Figure BDA0002045764920000121
Can be derived thereby
Figure BDA0002045764920000122
When the length of the fingerprint identification area corresponding to the upper collimating hole in the display panel, the film layer and the relative position of the upper collimating hole and the light sensing unit in the display panel, namely the size and other parameters of the upper collimating hole are fixed, the size of the area which can be irradiated by the fingerprint detection light reflected in the fingerprint identification area Z after the collimation effect of the upper collimating hole can be calculated according to the formula in the fingerprint identification stage. In the invention is provided with
Figure BDA0002045764920000123
The size of the light sensing unit in the display panel is ensured to be large enough, and in the fingerprint identification stage, the light reflected in the fingerprint identification zone Z for fingerprint detection can penetrate throughGo up the collimation hole and shine on the light sense unit, be detected by the light sense unit to avoid leading to partial light to be detected by the light sense unit and cause the loss because light sense unit size undersize leads to, this embodiment can guarantee that the light quantity of fingerprint detection is great, and then guarantees the sensitivity that the light sense unit detected.
In an embodiment, fig. 13 is a schematic partial top view of another alternative embodiment of a display panel provided in the present invention. Fig. 14 is a simplified cross-sectional view at the position of line C-C' of fig. 13. As shown in fig. 13, an orthogonal projection of the upper collimating hole K1 on the first substrate 1011 is a first projection P1, an orthogonal projection of the photo sensing unit S on the first substrate 1011 is a fourth projection P4, the first projection P1 and the fourth projection P4 are aligned along the first direction a, and the first projection P1 and the fourth projection P4 overlap; since the top view direction is the same as the projection direction, the collimating hole K1 overlaps the first projection P1 and the light sensing unit S overlaps the fourth projection P4 in the top view. The shapes and sizes of the upper collimating hole K1 and the light sensing unit S are only schematically shown in the drawings.
The display panel comprises fingerprint identification areas, and an upper collimating hole corresponds to one fingerprint identification area; the display panel comprises a first section, wherein the first section is parallel to the first direction and is vertical to the plane of the display panel; taking the plane of the tangent line C-C' in fig. 13 as the first cross section, as shown in fig. 14, the fingerprint identification area Z corresponding to the upper collimating aperture K1 is illustrated;
in the first cross section: in the direction e perpendicular to the display panel, the distance from the light sensing unit S to the upper collimating hole K1 is Y1, and the distance from the light sensing unit S to the display surface of the display panel is Y2; in a first direction: the length of the light sensing unit S is m, the length of the upper collimating hole K1 is D, and the length of the fingerprint identification area Z is D; in the direction perpendicular to the display panel, the length of the portion of the light sensing unit S overlapping the upper collimating hole K1 in the first direction a is X1, and the length of the portion of the light sensing unit S overlapping the fingerprint identification area Z in the first direction a is X2; Δ EFG and Δ EHK are similar as shown, then
Figure BDA0002045764920000131
Can be derived thereby
Figure BDA0002045764920000132
When the length of the fingerprint identification area corresponding to the upper collimating hole in the display panel, the film layer and the relative position of the upper collimating hole and the light sensing unit in the display panel, namely the size and other parameters of the upper collimating hole are fixed, the size of the area which can be irradiated by the fingerprint detection light reflected in the fingerprint identification area Z after the collimation effect of the upper collimating hole can be calculated according to the formula in the fingerprint identification stage. In the invention is provided with
Figure BDA0002045764920000133
Guarantee that the size that light sense unit set up is enough big in display panel, at the fingerprint identification stage, the fingerprint detection light homoenergetic that is used for of fingerprint identification district Z internal reflection can pierce through on the collimation hole shines the light sense unit, is detected by the light sense unit to avoid because light sense unit size undersize leads to partial light can not be detected by the light sense unit and causes the loss, this embodiment can guarantee that the light quantity of fingerprint detection is great, and then guarantees the sensitivity that the light sense unit detected.
The arrangement of the light diffusion structure in the display panel provided by the present invention may include various cases, and the following embodiments schematically illustrate the light diffusion structure in the present invention.
In an embodiment, fig. 15 is a schematic view of a film structure of another alternative embodiment of a display panel provided in the present invention. As shown in fig. 15, the display panel further includes a lower polarizer 105, the lower polarizer 105 is disposed on a side of the first substrate 1011 away from the light sensing unit S; the outer surface of the lower polarizer 105 on the side away from the first substrate 1011 is a first surface M2, and at least a partial area of the first surface M2 is roughened to form the light scattering structure 104. The first surface M2 is roughened to form an uneven light scattering structure, which is only schematically shown in the figure, and the light scattering structure 104 may be a regular structure or an irregular structure, which is not limited herein.
In an embodiment, fig. 16 is a schematic view of a film structure of another alternative embodiment of a display panel provided in the present invention. As shown in fig. 16, the display panel further includes a lower polarizer 105, the lower polarizer 105 is disposed on a side of the first substrate 1011 away from the light sensing unit S; the light scattering structure includes scattering particles 1041, and the scattering particles 1041 are doped in at least a partial region of the polarizer 105.
In an embodiment, fig. 17 is a schematic view of a film structure of another alternative embodiment of a display panel provided in the present invention. As shown in fig. 17, the display panel further includes a lower polarizer 105, the lower polarizer 105 is disposed on a side of the first substrate 1011 away from the light sensing unit S; a light scattering structure 104 is attached to the side of the lower polarizer 105 away from the display surface of the display panel, i.e., the light exit surface M1 of the display panel. The light scattering structure 104 in this embodiment may be a film layer having a rough outer surface, or may be a film layer doped with scattering particles.
Fig. 18 is a schematic view of a display device provided by the present invention. As shown in fig. 18, the display device includes a display panel 100 provided in any embodiment of the present invention. The display device provided by the embodiment of the invention can be any electronic product with a display function, including but not limited to the following categories: the mobile terminal comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a mobile phone, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
according to the display panel, the light scattering structure is arranged on the side, away from the color film substrate, of the array substrate, the light scattering structure can scatter light, and the fact that the light which can be totally reflected on the light emergent surface of the display panel exists in the light which enters the display panel is guaranteed. The fingerprint identification assembly comprising at least one upper collimating hole and one light sensing unit is arranged to serve as a structure for fingerprint identification detection in a fingerprint identification stage. In the fingerprint identification detection stage, when the light for fingerprint identification detection irradiates the position of the valley of the fingerprint, the light can be irradiated on the light sensing unit through the upper collimating hole after being totally reflected on the light emergent surface; when the light for fingerprint identification detection irradiates the position of the ridge of the fingerprint, the light can be reflected on the light emergent surface and then irradiates the light sensing unit through the upper collimating hole. The light sensing unit identifies valleys and ridges of the fingerprint according to the intensity of the detected light signal. The light used for fingerprint identification detection does not need to penetrate through the light emergent surface back and forth, and the light loss is less, so that the light quantity used for fingerprint detection is larger, and the detection sensitivity of the light sensing unit can be ensured. In addition, the display panel provided by the invention does not need to increase the size of the upper collimating hole and the size of the light sensing unit in order to increase the light quantity of fingerprint detection in the related art, and the design of the invention does not increase the signal-to-noise ratio and can ensure the precision of fingerprint detection.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (13)

1. A display panel, comprising:
the array substrate and the color film substrate are oppositely arranged;
the light sensation identification assembly comprises at least one light sensation unit and at least one upper collimation hole; the array substrate comprises a first substrate and the light sensing unit positioned on one side of the first substrate close to the color film substrate,
the color film substrate is provided with the upper collimating hole, and the upper collimating hole and the light sensing unit are dislocated in the direction vertical to the display panel;
the display panel further comprises a light scattering structure, and the light scattering structure is positioned on one side, away from the light sensing unit, of the first substrate;
the light sensation identification assembly further comprises a lower collimating hole, the lower collimating hole is positioned on one side of the light sensation unit, which is far away from the first substrate, and in the direction perpendicular to the display panel, the orthographic projection of the lower collimating hole on the plane of the light sensation unit is overlapped with the light sensation unit;
includes a plurality of sub-pixels including an opening region;
the orthographic projection of the upper collimating hole on the first substrate is a first projection, the orthographic projection of the lower collimating hole on the first substrate is a second projection, and in one light-sensitive identification assembly, the first projection and the second projection are arranged along a first direction;
in the first direction, the light sensation identification component is positioned between the opening areas of two adjacent sub-pixels.
2. The display panel according to claim 1,
the light sensation identification assembly further comprises at least one middle collimation hole, and the middle collimation hole is positioned between the upper collimation hole and the lower collimation hole in the direction perpendicular to the display panel;
the orthographic projection of the middle collimating hole on the first substrate is a third projection;
in one of the light-sensing identification components: the geometric center of the first projection, the geometric center of the second projection and the geometric center of the third projection are located on the same straight line.
3. The display panel according to claim 2,
the array substrate is provided with the middle collimating hole, and/or the color film substrate is provided with the middle collimating hole.
4. The display panel according to claim 1,
in one of the light-sensing identification components: the area of the second projection is larger than or equal to the area of the first projection.
5. The display panel according to claim 1, comprising a light exit surface, wherein the light exit surface is an outer surface of a display surface side of the display panel, and a critical angle of total reflection of light emitted from the display panel to the light exit surface is α in a fingerprint identification stage;
the display panel comprises a first cross section, and the first cross section is parallel to the first direction and is vertical to the plane of the display panel;
in the first cross-section:
the upper collimating aperture includes a first boundary point and a second boundary point opposite in the first direction, and the lower collimating aperture is spaced from the first boundary point by a distance less than the distance from the second boundary point in the first direction;
the lower collimating hole comprises a first light-transmitting area, the first light-transmitting area is provided with a third boundary point and a fourth boundary point, in the first direction, the distance from the third boundary point to the upper collimating hole is smaller than the distance from the fourth boundary point to the upper collimating hole, and the distance from the third boundary point to the first boundary point is L; wherein the content of the first and second substances,
Figure FDA0003246308730000021
h is the spacing distance between the upper collimating hole and the lower collimating hole in the direction perpendicular to the display panel.
6. The display panel according to claim 1,
the light sensing unit is arranged on the first substrate, and the light sensing unit is arranged on the first substrate;
the outer surface of one side, away from the first substrate, of the lower polarizer is a first surface, and at least part of the area of the first surface is subjected to rough treatment to form the light scattering structure.
7. The display panel according to claim 1,
the light sensing unit is arranged on the first substrate, and the light sensing unit is arranged on the first substrate;
the light scattering structure comprises scattering particles, and at least part of the area of the polaroid is doped with the scattering particles.
8. The display panel according to claim 1,
the light sensing unit is arranged on the first substrate, and the light sensing unit is arranged on the first substrate; the light scattering structure is attached to one side, far away from the display surface of the display panel, of the lower polarizer.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
10. A display panel, comprising:
the array substrate and the color film substrate are oppositely arranged;
the light sensation identification assembly comprises at least one light sensation unit and at least one upper collimation hole; the array substrate comprises a first substrate and the light sensing unit positioned on one side of the first substrate close to the color film substrate,
the color film substrate is provided with the upper collimating hole, and the upper collimating hole and the light sensing unit are dislocated in the direction vertical to the display panel;
the display panel further comprises a light scattering structure, and the light scattering structure is positioned on one side, away from the light sensing unit, of the first substrate;
the orthographic projection of the upper collimating hole on the first substrate is a first projection, the orthographic projection of the light sensing unit on the first substrate is a fourth projection, the first projection and the fourth projection are arranged along a first direction, and the first projection and the fourth projection are not overlapped;
the display panel comprises fingerprint identification areas, and one upper collimating hole corresponds to one fingerprint identification area;
the display panel comprises a first cross section, and the first cross section is parallel to the first direction and is vertical to the plane of the display panel;
in the first cross-section:
in the direction perpendicular to the display panel, the distance between the light sensing unit and the upper collimating hole is Y1, and the distance between the light sensing unit and the light emergent surface of the display panel is Y2;
in the first direction: the length of the light sensing unit is m, the length of the upper collimating hole is D, the distance from the light sensing unit to the upper collimating hole is X1, the length of the fingerprint identification area is D, and the distance from the light sensing unit to the fingerprint identification area is X2; wherein the content of the first and second substances,
Figure FDA0003246308730000041
11. a display device characterized by comprising the display panel according to claim 10.
12. A display panel, comprising:
the array substrate and the color film substrate are oppositely arranged;
the light sensation identification assembly comprises at least one light sensation unit and at least one upper collimation hole; the array substrate comprises a first substrate and the light sensing unit positioned on one side of the first substrate close to the color film substrate,
the color film substrate is provided with the upper collimating hole, and the upper collimating hole and the light sensing unit are dislocated in the direction vertical to the display panel;
the display panel further comprises a light scattering structure, and the light scattering structure is positioned on one side, away from the light sensing unit, of the first substrate;
the orthographic projection of the upper collimating hole on the first substrate is a first projection, the orthographic projection of the light sensing unit on the first substrate is a fourth projection, the first projection and the fourth projection are arranged along a first direction, and the first projection and the fourth projection are overlapped;
the display panel comprises fingerprint identification areas, and one upper collimating hole corresponds to one fingerprint identification area;
the display panel comprises a first cross section, and the first cross section is parallel to the first direction and is vertical to the plane of the display panel;
in the first cross-section:
in the direction perpendicular to the display panel, the distance between the light sensing unit and the upper collimating hole is Y1, and the distance between the light sensing unit and the light emergent surface of the display panel is Y2;
in the first direction: the length of the light sensing unit is m, the length of the upper collimating hole is D, and the length of the fingerprint identification area is D;
in the direction perpendicular to the display panel, the length of the part of the light sensing unit overlapping the upper collimating hole in the first direction is X1, and the length of the part of the light sensing unit overlapping the fingerprint identification area in the first direction is X2; wherein the content of the first and second substances,
Figure FDA0003246308730000051
13. a display device characterized by comprising the display panel according to claim 12.
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