CN114594629B - Fingerprint identification display panel and device - Google Patents
Fingerprint identification display panel and device Download PDFInfo
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- CN114594629B CN114594629B CN202210398557.XA CN202210398557A CN114594629B CN 114594629 B CN114594629 B CN 114594629B CN 202210398557 A CN202210398557 A CN 202210398557A CN 114594629 B CN114594629 B CN 114594629B
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- 239000002184 metal Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
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- 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
- G02F1/1336—Illuminating devices
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Optics & Photonics (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The embodiment of the application provides a fingerprint identification display panel and a fingerprint identification display device, wherein the fingerprint identification display panel comprises a protective layer, a color film substrate arranged below the protective layer and a first light source; the first light source is arranged on the side surface of the protective layer or below the exceeding part of the protective layer exceeding the color film substrate; the array substrate is used for collecting light rays. According to the fingerprint identification display panel provided by the embodiment of the application, the first light source is added, so that the light rays emitted by the first light source module can be transmitted in the whole fingerprint identification display panel, the fingerprint identification area is increased, and the large-area fingerprint identification effect is realized. Meanwhile, the light condensing unit can effectively collect light, the light emitting rate of the light is improved, and the recognition effect of large-area fingerprint recognition is further improved while the brightness of the fingerprint recognition display panel is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a fingerprint identification display panel and a fingerprint identification display device.
Background
Portable devices such as smart phones and tablet computers have become indispensable electronic devices for communication, learning, entertainment, shopping and the like, screen unlocking, electronic payment and the like can be used by identity verifiers, and fingerprint identification has become a necessary technology for portable electronic devices. The fingerprint recognition method in the current portable equipment is mostly optical fingerprint recognition and ultrasonic fingerprint recognition. Optical fingerprinting is more advantageous in terms of cost and therefore has wider application.
At present, in the display panel, the development of the middle and small sizes taking the mobile phone industry as a core is most rapid, and the mobile phone is taken as a mobile display tool, and plays important roles of communication, photographing, secret payment and the like, unlike the conventional large-size display (such as a television, a computer and the like), so that the mobile phone is an indispensable part in life. The secret payment function is closely related to personal property safety, and is the most concerned function of the vast consumer groups.
The optical fingerprint identification generally adopts a silicon-based complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) as a sensor, is matched with a lens or a micro lens, is integrated at the bottom of an organic light-emitting semiconductor screen in an externally hung mode, and converts optical signals reflected by fingers into electric signals through later algorithm processing to form different finger lines. The existing optical fingerprint identification only supports unlocking of a single finger, and can only be used in an organic light-emitting semiconductor display scheme, in addition, the fingerprint identification position is close to the lower frame of the mobile phone, large-area fingerprint identification cannot be realized, and the identification effect is poor.
Disclosure of Invention
The embodiment of the application provides a fingerprint identification display panel and a device, which aim to solve the problems that large-area fingerprint identification cannot be realized and the fingerprint identification effect is poor in the prior art.
To solve the above problems, in a first aspect, the present application provides a fingerprint identification display panel, including:
a protective layer;
the color film substrate is arranged below the protective layer, and the protective layer completely covers the color film substrate to protect the color film substrate;
the color film substrate comprises a color film substrate, a first light source, a second light source, a third light source, a fourth light source, a fifth light source, a sixth light source and a fourth light source, wherein the color film substrate is matched with the protective layer in size, the first light source is arranged on the side face of the protective layer, when the size of the protective layer is larger than that of the color film substrate, the first light source is arranged below the exceeding part of the protective layer, which exceeds the color film substrate, and light rays emitted by the first light source propagate in the protective layer in a total reflection mode;
the array substrate is arranged below the color film substrate;
the light condensing unit is arranged in the color film substrate or the array substrate and is used for condensing light rays.
In a possible embodiment, the first light source is an infrared light source.
In one possible embodiment, the array substrate includes a reflective sheet, the infrared light emitted by the infrared light source is transmitted through the reflective sheet, and the reflective sheet reflects the visible light.
In a possible embodiment, the fingerprint recognition display panel further includes a fingerprint recognition unit disposed under the reflection sheet.
In one possible embodiment, the fingerprint recognition unit includes a microlens, a filling layer, a sensor and a substrate which are sequentially stacked from top to bottom, and further includes a light shielding layer, the light shielding layer is disposed inside the filling layer, and the light shielding layer includes a plurality of openings to transmit light.
In one possible embodiment, the microlenses, the filling layer, and the light-shielding layer form a light-collimating structure, and an aspect ratio of the light-collimating structure is greater than a predetermined aspect ratio.
In one possible embodiment, the color film substrate includes a plurality of color resistors, and the center position of the light condensing unit and the projection portions of the plurality of color resistors in the vertical direction overlap.
In one possible embodiment, the condensing unit is a convex lens or a concave lens.
In one possible embodiment, the color film substrate and the array substrate are both multi-film structures, and when the light condensing unit is a convex lens, the refractive index of the light condensing unit is greater than the refractive index of the color film substrate or other film layers in the array substrate.
In a second aspect, an embodiment of the present application further provides a fingerprint identification display device, where the fingerprint identification display device includes a fingerprint identification display panel as set forth in any one of the above.
The beneficial effects are that: the embodiment of the application provides a fingerprint identification display panel and a fingerprint identification display device, wherein the fingerprint identification display panel comprises a protective layer, a color film substrate arranged below the protective layer and a first light source; the first light source is arranged on the side surface of the protective layer or below the exceeding part of the protective layer exceeding the color film substrate; the array substrate is used for collecting light rays. According to the fingerprint identification display panel provided by the embodiment of the application, the first light source is added, so that the light rays emitted by the first light source module can be transmitted in the whole fingerprint identification display panel, the fingerprint identification area is increased, and the large-area fingerprint identification effect is realized. Meanwhile, the light condensing unit can effectively collect light, the light emitting rate of the light is improved, and the recognition effect of large-area fingerprint recognition is further improved while the brightness of the fingerprint recognition display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a fingerprint identification display panel according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an embodiment of fingerprint recognition according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a fingerprint identification unit according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an optical path of an improved fingerprint recognition unit according to the present application;
fig. 5 is a schematic diagram of another embodiment of a fingerprint identification display panel according to an embodiment of the present application;
FIG. 6 is a schematic diagram of an embodiment of a color filter substrate according to an embodiment of the present application;
fig. 7 is a schematic diagram of an embodiment of a condensing unit for condensing light according to an embodiment of the present application;
fig. 8 is a schematic diagram of another embodiment of converging light rays by the condensing unit according to the embodiment of the present application;
fig. 9 is a schematic structural diagram of another embodiment of a fingerprint identification display panel according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides a fingerprint identification display panel and a fingerprint identification display device. The following will describe in detail.
As shown in fig. 1, a schematic structural diagram of an embodiment of a fingerprint identification display panel according to an embodiment of the present application may include:
a protective layer 10;
the color film substrate 20, the color film substrate 20 is arranged below the protective layer 10, and the protective layer completely covers the color film substrate 20 to protect the color film substrate 20;
when the size of the protective layer 10 is larger than that of the color film substrate 20, the first light source 30 is arranged below the exceeding part of the protective layer 10 beyond the color film substrate 20, and the light emitted by the first light source 30 propagates in a total reflection mode inside the protective layer 10;
the array substrate 40 is arranged below the color film substrate 20;
the light condensing unit 50 is disposed in the color film substrate 20 or the array substrate 40, and the light condensing unit 50 is used for condensing light.
The embodiment of the application provides a fingerprint identification display panel, which comprises a protective layer, a color film substrate and a first light source, wherein the color film substrate is arranged below the protective layer; the first light source is arranged on the side surface of the protective layer or below the exceeding part of the protective layer exceeding the color film substrate; the array substrate is used for collecting light rays. According to the fingerprint identification display panel provided by the embodiment of the application, the first light source is added, so that the light rays emitted by the first light source module can be transmitted in the whole fingerprint identification display panel, the fingerprint identification area is increased, and the large-area fingerprint identification effect is realized. Meanwhile, the light condensing unit can effectively collect light, the light emitting rate of the light is improved, and the recognition effect of large-area fingerprint recognition is further improved while the brightness of the fingerprint recognition display panel is improved.
In the embodiment shown in fig. 1, the size of the protective layer 10 is larger than the size of the color film substrate 20, and thus the protective layer 10 includes a portion that exceeds the color film substrate 20; and the protective layer 10 completely covers the color film substrate 20 to protect the color film substrate 20. At this time, the first light source 30 is disposed below the portion of the protective layer 10 beyond the color film substrate 20 and on the side surface of the color film substrate 20.
And in the embodiment shown in fig. 1, the first light source 30 is actually an infrared light source, so that infrared light emitted by the infrared light source can propagate in a totally reflective manner inside the protective layer 10. Of course, in other embodiments, if the dimensions of the protective layer 10 and the color film substrate 20 are matched, specifically, if the dimensions of the protective layer 10 and the color film substrate 20 are the same, the light emitted by the first light source 30 can be transmitted in the protective layer 10 in a total reflection manner when the first light source 30 is located at the side of the protective layer 10 and is at the same level as the protective layer 10.
In the embodiment of the present application, the first light source 30 is added, and the light emitted by the first light source 30 can propagate in the protective layer 10 in a total reflection manner. When the finger touches the surface of the protective layer 10, the ridge of the finger contacts the protective layer 10, so that the original total reflection light is destroyed; thus, the light at the ridge position of the finger is reflected downwards through the skin, while the total reflection of the light at the valley position of the finger is not destroyed, but the signal is weaker. At this time, the light emitted by the first light source 30 penetrates through each film layer of the fingerprint identification display panel and then enters the fingerprint identification unit, and reaches the sensor after passing through the light path structure of the fingerprint identification unit, so as to realize fingerprint identification.
In general, the color film substrate of the fingerprint recognition display panel is the area of the display screen, because the protective layer 10 completely covers the color film substrate 20; therefore, the fingerprint identification display panel provided by the embodiment of the application can realize large-area fingerprint identification. The light emitted by the first light source 30 is totally reflected in the whole protective layer 10, and any region of the finger contacting the protective layer 10 can cause the partial total reflection corresponding to the region to be destroyed, so that fingerprint identification can be realized in the region; thereby enabling the entire protective layer 10 to be fingerprint-identified.
As shown in fig. 2, an optical path diagram of an embodiment of fingerprint recognition is provided in an embodiment of the present application. In the embodiment shown in fig. 2, the fingerprint recognition display panel further includes a fingerprint recognition unit 60, and the fingerprint recognition unit 60 is located below the array substrate 40; or the fingerprint recognition unit 60 is located at the lowermost part of the entire fingerprint recognition display panel structure.
In fig. 2, the light emitted by the first light source 30 is transmitted in the protective layer 10 in a total reflection manner under normal conditions, and when a finger touches the protective layer 10, partial total reflection is destroyed, so that partial light can penetrate through multiple film layers in the fingerprint recognition display panel and reach the fingerprint recognition unit 60. The fingerprint recognition unit 60 includes a sensor, which can recognize the light from the protective layer 10 (or from the first light source 30), so as to realize fingerprint recognition.
Of course, in the embodiment of the present application, since the light emitted by the first light source 30 needs to penetrate through multiple film layers in the fingerprint recognition display panel to reach the fingerprint recognition unit 60 when the fingerprint recognition function is implemented, that is, the light needs to sequentially penetrate through the color film substrate 20 and the array substrate 40 and then reach the fingerprint recognition unit 60. The array substrate 40 in the embodiment of the present application further includes a reflective sheet, and the reflective sheet can transmit part of the invisible light emitted by the first light source 30 and reflect the visible light.
In one embodiment, the first light source 30 is an infrared light source, and the reflective sheet reflects visible light through infrared light. Since the wavelength range of the organic infrared sensor which is usually manufactured is 380nm-1200nm, the conventional reflecting sheet cannot transmit infrared light waves of 850nm-1000 nm; therefore, in the embodiment of the present application, the first light source 30 is added, and the original reflective sheet needs to be replaced by a reflective sheet capable of transmitting the light emitted by the first light source 30.
In the embodiment of the present application, the first light source 30 may be disposed under the protective layer 10, or may be disposed at a side of the protective layer 10; the angle of the light emitted by the first light source 30 is only required to be adjusted, so that the light emitted by the first light source 30 can propagate in the protective layer 10 in a total reflection manner.
Fig. 3 is a schematic structural diagram of an embodiment of a fingerprint identification unit according to the present application. In fig. 3, the fingerprint recognition unit 60 may include a microlens 601, a filling layer 602, a sensor 603, and a substrate 604, which are sequentially stacked from top to bottom; the fingerprint recognition unit 60 further includes a light shielding layer 605, the light shielding layer 605 is disposed inside the filling layer 602, and the light shielding layer 605 includes a plurality of openings for transmitting light.
In fig. 3, the micro-lens 601 is disposed above the opening in the light shielding layer 605, so that the light reaches the micro-lens 601 and then passes through the opening to reach the sensor 603 for identification. The size of the micro lens 601 is generally matched with the opening in the light shielding layer 605, and the micro lens 601 can completely cover the opening in the light shielding layer 605, so that light can completely enter the opening, and the brightness of fingerprint identification is improved. In some embodiments of the present application, the micro-lens 601 may be a convex lens structure with convex portions facing away from the sensor 603, so that light from the first light source 30 may be further condensed. The light shielding layer 605 can shield the interference signal with a large angle, and improve the signal-to-noise ratio of the fingerprint signal.
As shown in fig. 4, which is a schematic view of the optical path of the fingerprint identification unit according to the present application, in fig. 4, the micro lens 601, the filling layer 602 and the light shielding layer 605 form a light collimating structure, and the aspect ratio of the light collimating structure is greater than the preset aspect ratio. In one embodiment, the predetermined aspect ratio may be 10.
Referring to fig. 4, in fig. 4, the light collimating structure includes a portion 606 that is transparent to light, and a portion 607 that blocks light from passing through. The aspect ratio is the ratio h/a of the height h to the width a of the light-transmissive portion 607. The depth-to-width ratio h/a in the embodiment of the application is larger than the preset depth-to-width ratio. Generally, the larger the depth-to-width ratio is, the better the filtering effect of the large-angle signal is, and the better the fingerprint identification effect is; for different fingerprint identification display panels, the requirements of the depth-to-width ratios are also different, and the size of the depth-to-width ratios can be specifically set according to actual requirements.
Fig. 5 is a schematic diagram of another embodiment of a fingerprint identification display panel according to an embodiment of the present application. In fig. 5, the fingerprint recognition display panel further includes a light condensing unit 50, and the light condensing unit 50 is disposed in the array substrate 40. And the color film substrate 20 further includes a plurality of color resistors, and the central position of the light condensing unit 50 coincides with the projection portions of the plurality of color resistors in the vertical direction. And the center of the condensing unit 50 is disposed at the opening area of the TFT driving circuit of the array substrate 40, so that the light passes through the condensing unit 50 and then passes through the opening area of the TFT driving circuit to reach the fingerprint recognition unit 60.
In the embodiment of the application, the light condensing unit 50 is mainly used for condensing light, and the light emitted by the backlight source in the fingerprint identification display panel enters the color resistance of the color film substrate 20 through the opening area in the TFT driving circuit after being condensed by the light condensing unit 50, so that the shielding effect of the metal film layer in the TFT driving circuit on the large-angle backlight source can be reduced, and the light utilization rate of the backlight source can be effectively improved.
Fig. 6 is a schematic diagram of an embodiment of a color film substrate according to an embodiment of the present application. In the color film substrate shown in fig. 6, the light condensing unit 50 may also be disposed in the color film substrate 20; and may be specifically disposed above the color resist in the color film substrate 20. Regardless of whether the condensing unit 50 is provided in the color film substrate 20 or the array substrate 40, the center position of the condensing unit 50 is always provided corresponding to the color resistance in the color film substrate 20; normally, the projection of the condensing unit 50 in the vertical direction completely covers the projection of the color resist in the vertical direction; therefore, the light converged by the light condensing unit 50 can completely enter the color resistor, and the light yield of the light is improved.
Fig. 7 is a schematic diagram of an embodiment of a condensing unit for condensing light according to an embodiment of the present application. In fig. 7, solid lines 1 and 2 represent light rays emitted from a backlight in a fingerprint recognition display panel; namely, light rays 1 and 2 are light rays emitted by a backlight source; when the light rays 1 and 2 pass through the condensing unit 50, the light rays are refracted to obtain light ray 1 ， And 2 ， The originally dispersed light rays are converged, and the converged light rays are emitted from the opening area of the TFT driving circuit, so that shielding of a metal film layer and the light rays in the TFT driving circuit is avoided. The condensing unit 50 can effectively improve the light reaching the color film substrate 20, and finally improve the brightness of the whole fingerprint identification display panel.
Meanwhile, the condensing unit 50 may further condense the light emitted from the first light source 30. Specifically, since the light reflection intensity corresponding to the finger valleys is low and the light reflection intensity corresponding to the finger ridges is high, the proportion of the effective light signals collected by the condensing unit 50 is higher; the converged light enters the sensor in the fingerprint identification unit 60 after passing through the collimation structure, so that the fingerprint identification effect is improved.
Fig. 8 is a schematic diagram of another embodiment of the condensing unit for condensing light according to the embodiment of the present application. In fig. 8, light rays 3 and 4 are light rays emitted from the first light source 30 reflected by the finger; the light ray 3 and the light ray 4 are further converged after passing through the light condensing unit 50 and become the light ray 3 ， And ray 4 ， . The light 3 and the light 4 enter the sensor in the fingerprint recognition unit 60, and the originally dispersed light 3 and the light 4 become converged light 3 ， And ray 4 ， The number of light rays entering the fingerprint recognition unit 60 is increased, and the fingerprint recognition effect is improved.
In order to make the condensing unit 50 implement the function of condensing light, there is also a limit to the refractive index of the condensing unit 50. In an embodiment of the present application, the light condensing unit 50 may be a convex lens or a concave lens, and the light condensing unit 50 may be disposed in the color film substrate 20 or the array substrate 40. Meanwhile, in an actual fingerprint identification display panel, the color film substrate 20 and the array substrate 40 are generally of multi-film structures, and when the light condensing unit 50 is a convex lens, the refractive index of the light condensing unit 50 is greater than that of the color film substrate 20 or other film layers in the color film substrate 20. That is, if the light condensing unit 50 is in the color film substrate 20, the refractive index of the light condensing unit 50 is greater than the refractive index of other film layers in the color film substrate 20; if the light condensing unit 50 is in the array substrate 40, the refractive index of the light condensing unit 50 is greater than the refractive index of other film layers in the array substrate 40.
In other embodiments, when the light condensing unit 50 is a concave lens, the refractive index of the light condensing unit 50 is greater than that of the color film substrate 20 or other film layers in the array substrate 40. That is, if the light condensing unit 50 is in the color film substrate 20, the refractive index of the light condensing unit 50 is greater than the refractive index of other film layers in the color film substrate 20; if the light condensing unit 50 is in the array substrate 40, the refractive index of the light condensing unit 50 is greater than the refractive index of other film layers in the array substrate 40. That is, in the embodiment of the present application, the refractive index of the condensing unit 50 is larger than that of the color film substrate 20 or other film layers in the array substrate 40, regardless of whether the condensing unit 50 is a concave lens or a convex lens.
It should be noted that, in the embodiment of the present application, the light condensing unit 50 is a convex lens or a concave lens, and reference is mainly made to the orientation of the convex portion in the lens. Specifically, if the convex portion in the condensing unit 50 is toward the side of the protective layer 10, the condensing unit 50 may be considered as a convex lens; if the convex portion of the condensing unit 50 is directed to the fingerprint recognition unit 60, the condensing unit 50 may be considered as a concave lens.
Fig. 9 is a schematic structural diagram of another embodiment of a fingerprint identification display panel according to an embodiment of the present application. In fig. 9, the protective layer 10 completely covers the color film substrate 20, and the protective layer 10 includes a portion beyond the color film substrate 20; the first light source 30 is disposed below the portion of the protective layer 10 beyond the color film substrate 20 and on the side surface of the color film substrate 20. And the light emitted from the first light source 30 may be transmitted in the protective layer 10 in a total reflection manner.
The light emitted by the first light source 30 is destroyed by the finger, so that part of the light sequentially passes through the color film substrate 20 and the array substrate 40 to reach the fingerprint identification unit 60; when part of the light emitted by the first light source 30 also passes through the light condensing unit 50 in the array substrate 40, the originally dispersed light becomes converged after passing through the light condensing unit 50, so that the fingerprint identification effect can be effectively improved.
The light emitted by the backlight source sequentially passes through the array substrate 40 and the color film substrate 20 and then reaches the protective layer, and the light emitted by the backlight source also passes through the light condensing unit 50, so that the originally scattered light becomes convergent; thus, the overall display brightness of the fingerprint identification display panel is improved.
In the embodiment shown in fig. 9, the color film substrate 20 further includes a Polarizer (POL); the polarizer is disposed under the protective layer 10, and the polarizer is bonded with the protective layer 10 through an optical adhesive (Optically Clear Adhesive, OCA). The color film substrate also comprises a substrate arranged below the polaroid, and a color resistor and black matrix layer arranged below the substrate; and the color resist and black matrix layers are disposed in the same layer. The color resists may also include color resists of a plurality of colors such as RGB, and the like, and are not limited herein.
In fig. 9, a Liquid Crystal (LC) layer is further disposed between the color film substrate 20 and the array substrate 40; and the condensing unit 50 is disposed in the array substrate 40. Specifically, the array substrate 40 may include a TFT layer, a flat layer (flat layer), a glass substrate, a polarizer, a light guide plate, and a reflective sheet sequentially disposed from top to bottom, and a backlight disposed on a side of the light guide plate and on the same side as the first light source 30.
The fingerprint recognition unit 60 is disposed below the reflective sheet, and when the first light source 30 is an infrared light source, the reflective sheet in the array substrate 40 can reflect visible light through the infrared light, and the visible light passing through the reflective sheet can reach the sensor after passing through the micro lens, the light shielding layer 605 and the filling layer 602 in the fingerprint recognition unit 60, so as to perform fingerprint recognition.
In fig. 9, the light from the first light source 30 is converged by the light converging unit 50 and then reaches the fingerprint recognition unit 60, so that the fingerprint recognition effect can be effectively improved. The light emitted by the backlight source is reflected by the reflecting sheet, and then is converged by the light condensing unit 50 and reaches the protective layer 10, so that the overall brightness of the fingerprint identification display panel can be effectively improved.
It should be noted that, in the above display panel embodiments, only the above structures are described, and it should be understood that, in addition to the above structures, any other necessary structures, such as a substrate, a buffer layer, an interlayer dielectric layer (ILD), etc., may be included in the display panel according to the embodiments of the present application, which is not limited herein.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.
In the implementation, each unit or structure may be implemented as an independent entity, or may be implemented as the same entity or several entities in any combination, and the implementation of each unit or structure may be referred to the foregoing method embodiments and will not be repeated herein.
The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.
The foregoing describes in detail a fingerprint identification display panel and apparatus provided by embodiments of the present application, and specific examples are applied herein to illustrate principles and implementations of the present application, where the foregoing examples are provided to assist in understanding the method and core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (8)
1. A fingerprint identification display panel, characterized in that the fingerprint identification display panel comprises:
a protective layer;
the color film substrate is arranged below the protective layer, and the protective layer completely covers the color film substrate to protect the color film substrate;
the color film substrate comprises a color film substrate, a first light source, a second light source, a third light source, a fourth light source, a fifth light source, a sixth light source and a fourth light source, wherein the color film substrate is matched with the protective layer in size, the first light source is arranged on the side face of the protective layer, when the size of the protective layer is larger than that of the color film substrate, the first light source is arranged below the exceeding part of the protective layer, which exceeds the color film substrate, and light rays emitted by the first light source propagate in the protective layer in a total reflection mode;
the array substrate is arranged below the color film substrate;
the light condensing unit is arranged in the color film substrate or the array substrate and is used for condensing light rays emitted by the first light source and light rays emitted by a backlight source in the fingerprint identification display panel;
the fingerprint identification unit comprises a micro lens, a filling layer, a sensor and a substrate which are sequentially stacked from top to bottom, and further comprises a shading layer, wherein the shading layer is arranged inside the filling layer and comprises a plurality of openings for transmitting light, and the projection of the micro lens in the vertical direction covers the openings of the shading layer;
the color film substrate comprises a plurality of color resistors, and the central position of the light condensing unit is overlapped with the projection parts of the color resistors in the vertical direction.
2. The fingerprint recognition display panel of claim 1, wherein the first light source is an infrared light source.
3. The fingerprint recognition display panel of claim 2, wherein the array substrate includes a reflective sheet therein, the infrared light emitted from the infrared light source is transmitted through the reflective sheet, and the reflective sheet reflects visible light.
4. A fingerprint recognition display panel according to claim 3, wherein the fingerprint recognition unit is disposed under the reflection sheet.
5. The fingerprint identification display panel of claim 1, wherein the micro lenses, the filling layer and the light shielding layer form a light collimating structure, and an aspect ratio of the light collimating structure is greater than a preset aspect ratio.
6. The fingerprint recognition display panel of claim 1, wherein the condensing unit is a convex lens or a concave lens.
7. The fingerprint recognition display panel of claim 6, wherein the color film substrate and the array substrate are both of a multi-film structure, and when the light condensing unit is a convex lens, the refractive index of the light condensing unit is greater than the refractive index of the color film substrate or other film layers in the array substrate.
8. A fingerprint identification display device, characterized in that it comprises a fingerprint identification display panel according to any one of claims 1-7.
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| CN202210398557.XA CN114594629B (en) | 2022-04-15 | 2022-04-15 | Fingerprint identification display panel and device |
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| CN202210398557.XA CN114594629B (en) | 2022-04-15 | 2022-04-15 | Fingerprint identification display panel and device |
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| CN114594629A (en) | 2022-06-07 |
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