CN108598109B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108598109B CN108598109B CN201810358694.4A CN201810358694A CN108598109B CN 108598109 B CN108598109 B CN 108598109B CN 201810358694 A CN201810358694 A CN 201810358694A CN 108598109 B CN108598109 B CN 108598109B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
Abstract
The invention discloses a display panel and a display device. The display panel includes the display area, and the display area includes luminous zone and non-luminous zone, and non-luminous zone includes printing opacity district and non-printing opacity district, and the display panel includes: the array layer comprises a plurality of metal wires positioned in the non-light-emitting area; the display layer is positioned on the array layer and comprises a plurality of light-emitting devices, each light-emitting device comprises an anode, a light-emitting layer and a cathode, and each light-emitting region comprises a light-emitting device and a plurality of light-sensitive devices and is positioned on one side of the array layer, which is far away from the display layer; the polarized light layer is positioned on one side, far away from the array layer, of the display layer and provided with a first opening positioned in the non-luminous area, wherein at least part of the first opening is positioned in the light-transmitting area, and the light-transmitting area is an area without metal wires in the non-luminous area. The invention can improve the penetration rate of fingerprint identification light, increase the light quantity received by the light sensor and improve the fingerprint identification precision.
Description
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. When a user operates the display device with the fingerprint identification function, the user can touch the fingerprint identification sensor of the display device with a finger to carry out authority verification, and the authority verification process is simplified.
The light sensing fingerprint identification technology generally performs fingerprint identification by detecting light reflected to a fingerprint identification unit through a touch subject (such as a finger), i.e., determining ridges and valleys of a fingerprint. The current light sensation fingerprint identification technology identifies fingerprints by detecting intensity differences of reflected light rays of fingerprint valleys and ridges. The fingerprint identification sensing unit (i.e. the light sensing device) receives a large amount of light, so that the fingerprint identification accuracy is high, and the light sensing device receives a small amount of light, so that the fingerprint identification accuracy is low.
Therefore, it is an urgent need in the art to provide a display panel and a display device that increase the amount of light received by the light sensor and improve the fingerprint recognition accuracy.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which solve the technical problems of increasing the light quantity received by the light sensor and improving the fingerprint identification precision.
In order to solve the above technical problem, the present invention provides a display panel, including a display region, the display region including a light emitting region and a non-light emitting region, the non-light emitting region including a light transmitting region and a non-light transmitting region, the display panel including:
the array layer comprises a plurality of metal wires positioned in the non-light-emitting area;
a display layer, located over the array layer, comprising:
a plurality of light emitting devices including an anode, a light emitting layer, and a cathode, wherein one light emitting region includes one light emitting device;
the plurality of light sensing devices are positioned on one side of the array layer, which is far away from the display layer;
the polarized light layer is positioned on one side, far away from the array layer, of the display layer and provided with a first opening positioned in the non-luminous area, wherein at least part of the first opening is positioned in the light-transmitting area, and the light-transmitting area is an area without metal wires in the non-luminous area.
Further, in order to solve the above technical problem, the present invention provides a display device including any one of the display panels.
Compared with the prior art, the display panel and the display device provided by the invention have the beneficial effects that:
in the display panel provided by the invention, the polarizing layer is provided with the first opening, and at least part of the first opening is positioned in the light-transmitting area. The light-transmitting area is an area through which light rays for fingerprint identification can penetrate, and the light rays for fingerprint identification can reach the light sensing device after penetrating through the light-transmitting area. In the fingerprint identification stage, the light reflected by the touch main body can penetrate through the polarizing layer from the first opening and then reach the light sensing device, so that light loss generated when the light penetrates through the polarizing layer is reduced, namely, the penetration rate of the fingerprint identification light is improved, the light quantity received by the light sensing device is increased, and the fingerprint identification precision is improved.
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 schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken at line Q1 of FIG. 1;
FIG. 3 is a schematic cross-sectional view of an alternative embodiment of a display panel according to an embodiment of the invention;
fig. 4 is a schematic view of a non-light-emitting area of a display panel according to an embodiment of the invention;
fig. 5 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 11 is a schematic view of a display device according to an embodiment of the 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 top view of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view of a position of a cut line Q1 in fig. 1.
Referring to fig. 1 and fig. 2 together, the display panel provided by the present invention includes a display area AA including a light-emitting area AA1 and a non-light-emitting area AA2, wherein the non-light-emitting area AA2 surrounds the light-emitting area AA 1. The non-light emitting region AA2 includes a light transmitting region AA2T and a non-light transmitting region AA 2F. The display panel includes a light emitting device (not shown in fig. 1), and one light emitting region AA1 includes one light emitting device, that is, the region where the light emitting device is located is a light emitting region AA 1. The non-light emitting area AA2 is usually provided with a metal line M in the display panel circuit, and the metal line M is made of a metal material and light cannot penetrate through the metal line M, so that the area where the metal line is located in the non-light emitting area AA2 is the non-light transmitting area AA 2F; the non-light emitting area AA2 is not provided with the metal line M as the light transmissive area AA2T, i.e. light can penetrate through, and in the light sensing fingerprint identification display panel, light usually penetrates through the film layer of the display panel through the light transmissive area AA2T and then reaches the light sensing device. It should be noted that the metal line M in the non-light emitting area AA2 in fig. 1 is only a schematic representation. The location and size of the first opening K1 in fig. 1 is also shown schematically and is not intended to limit the invention.
Referring to fig. 1 and 2, the display panel includes: the array layer 101 includes a plurality of metal lines M located in the non-light emitting areas AA2, and the area where the metal lines M are located is a non-light transmitting area AA 2F; a display layer 102 disposed on the array layer 101 and including a plurality of light emitting devices 1021 including an anode a, a light emitting layer b and a cathode c, and a plurality of light sensing devices 103 disposed on a side of the array layer 101 away from the display layer 102; and a polarizing layer 104 disposed on a side of the display layer 102 away from the array layer 101, wherein the polarizing layer 104 has a first opening K1 disposed in the non-light-emitting region AA2, and at least a portion of the first opening K1 is disposed in the light-transmitting region AA 2T. The light transmissive area AA2T is an area of the non-light emitting area AA2 where the metal line M is not disposed. The first opening K1 may be entirely located in the light-transmitting area AA2T, or the first opening K1 may include both a portion located in the light-transmitting area AA2T and a portion located in the non-light-transmitting area AA 2F. Optionally, the display panel may further include a plurality of support structures 1022 located between two adjacent light emitting devices 1021 and located in the non-light emitting area AA2, where the support structures 1022 are usually made of a light-transmitting material, and light has a certain transmittance when passing through the support structures; an encapsulation structure (not shown) may be further disposed above the display layer 102, and a protective layer 105 may be further included above the polarizing layer 104, and the protective layer 105 may be a protective cover plate. The light emitting device 1021 may be a top emission structure or a bottom emission structure, and fig. 2 only illustrates the top emission structure, in order to ensure the light utilization rate when the display panel displays, in the top emission structure, the anode a is usually made of a metal reflective material, the anode a is opaque, and the cathode c is made of a transparent material, so as to ensure the light transmittance.
In the fingerprint identification stage, the light emitting device in the display panel may be reused as a light source for fingerprint identification, optionally, the light source for fingerprint identification may also be an external light source, and fig. 2 schematically illustrates the light emitting device as a light source. In the display panel provided by the invention, the polarizing layer 104 is provided with the first opening K1, and at least part of the first opening K1 is positioned in the light-transmitting area AA 2T. The transparent area AA2T is an area through which light for fingerprint identification can pass, the light for fingerprint identification can reach the light sensing device after passing through the transparent area AA2T, and the light for fingerprint identification cannot pass through the non-transparent area AA 2F. In the present invention, in the fingerprint identification stage, after the light emitted by the light emitting device 1021 reaches the touch subject W (for example, the finger pulp), at least part of the light reflected by the touch subject can pass through the polarizing layer 104 from the first opening K1 and then reach the light sensing device 103, so as to reduce the light loss generated when the light passes through the polarizing layer 104, which is equivalent to improving the transmittance of the fingerprint identification light, thereby increasing the light quantity received by the light sensing device and improving the fingerprint identification precision. In addition, the polarizing layer is arranged in the display panel to avoid the influence of ambient light on the display effect of the display panel, and the first opening arranged in the polarizing layer is located in the non-light-emitting area, that is, the polarizing layer is not arranged at the first opening. The non-luminous area is not provided with the anode which has strong reflection effect on the environment light, and the influence of the external environment light on the display effect of the non-luminous area is small, so that the display effect of the display panel in the display stage is less influenced by the arrangement of the invention.
In general, light loss of light penetrating through the polarizing layer is about 40% -45%, and the light loss is large, so that by means of the design scheme provided by the invention, fingerprint identification light penetrates through the polarizing layer from the first through hole, the light loss can be effectively reduced, and the light transmittance is improved.
When the display panel is designed, the first opening can be designed according to the size of the light-transmitting area, so that the first opening is completely positioned in the light-transmitting area; alternatively, the first opening may be provided only in accordance with the size of the non-light-emitting region regardless of the size of the light-transmitting region, so that the first opening includes both a portion located in the light-transmitting region and a portion located in the non-light-transmitting region.
Optionally, fig. 3 is a schematic cross-sectional view of an alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 3, the array layer 101 includes a plurality of thin film transistors T as switching devices of sub-pixels in the display panel. The thin film transistor T includes an active layer T1, a source T2, a drain T3, and a gate T4, and is exemplarily illustrated in fig. 3 only by the thin film transistor T having a top gate structure, it should be noted that the thin film transistor T may also have a bottom gate structure in the present invention; the anode a of the light emitting device 1021 is electrically connected to the source T2 or the drain T3 of the thin film transistor T, and the anode a and the drain T3 are schematically shown in fig. 3The drain electrode T3 of the thin film transistor T is electrically connected. The specific meanings of the reference numerals in fig. 3 can be explained with reference to the corresponding embodiment in fig. 2. The top-emission light emitting device structure shown in fig. 3 is merely exemplified, in which the anode a is used as a reflective electrode, is usually made of a metal material, and may be formed of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, or a mixture thereof; the light emitting layer b may include a red light emitting layer, a green light emitting layer, a blue light emitting layer, or a white light emitting layer; the cathode c is a transparent electrode and may include Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), or indium oxide (In)2O3) And the like; the anode a can effectively reflect the light emitted by the light emitting layer b to the light emitting side, and the light emitting efficiency is improved.
Further, in some optional embodiments, fig. 4 is a schematic view of a non-light emitting region of a display panel according to an embodiment of the present invention. As shown in fig. 4, the complex metal lines M and the supporting structures 1022 in the non-light-emitting region are shown, the non-light-emitting region is the light-transmitting region AA2T, and the first openings K1 are all located in the light-transmitting region AA 2T. The metal lines M and the supporting structures 1022 in fig. 4 are only schematic representations and are not intended to limit the present invention, wherein the metal lines M may include scan lines, data lines, reference voltage lines, control signal lines, or the like. In the display panel, fingerprint identification light can only penetrate through the display layer and the array layer of the display panel from the light-transmitting area AA2T to reach the light sensing device, in this embodiment, the first opening K1 is arranged on the polarizing layer, and the first opening K1 is located in the light-transmitting area AA2T, so that at least part of the light reflected by the touch main body can penetrate through the polarizing layer from the first opening K1 and then reach the light sensing device in the fingerprint identification stage, thereby reducing light loss when the light penetrates through the polarizing layer, equivalently improving the penetration rate of the fingerprint identification light, increasing the light quantity received by the light sensing device, and improving the fingerprint identification precision.
Optionally, with continued reference to fig. 4, the display panel provided by the embodiment of the invention includes a plurality of first openings K1 with different sizes. For example, the first opening K1 may be designed according to the size and shape of the light transmissive area AA2T in the display panel.
Further, fig. 5 is a schematic diagram of a film structure of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 5, the display panel further includes a retardation film 106, the retardation film 106 is located on the side of the polarizing layer 104 close to the display layer 102, the display panel further includes a substrate 107, wherein the substrate 107 can be a cover plate, the substrate 107 is located on the side of the polarizing layer 104 far from the retardation film 106, the polarizing layer 104 is a liquid crystal coating type polarizing layer, and the retardation film 106 is a coating type retardation film. Alternatively, the retardation film 106 may be a single layer, or as shown in fig. 5, the retardation film 106 has the second opening K2; the second opening K2 coincides with the first opening K1 in an orthographic projection of the polarizing layer 104.
In this embodiment, the polarizing layer 104 is a liquid crystal coating type polarizing layer, and the retardation film 106 is a coating type retardation film, and the polarizing layer 104 can be manufactured by coating a liquid crystal molecule layer on the surface of the substrate 107 side, using the substrate 107 as a base, and then orienting the liquid crystal molecules by a treatment process such as photo-alignment to realize a polarizing function, and then coating the retardation film 106 on the polarizing layer 104. The thickness of the polarizing layer can be controlled to be about 1-10 μm, and the thickness of the retardation film 106 formed by coating is relatively thin. The conventional circular polarizer generally includes a plurality of films such as a PVA film (polyvinyl alcohol), a TAC film (triacetyl cellulose film), and a protective film, and has a thickness of about 50 μm or more, and the conventional circular polarizer is not easy to be patterned and is easily subject to qualitative change in a severe environment. The polarizing layer and the phase difference film in the display panel provided by the invention are favorable for the thinning requirement of the display panel, have good performance stability in a severe environment, and can be subjected to patterning treatment to form holes so as to improve the light transmittance of fingerprint identification.
When the polarizing layer 104 is manufactured, a whole layer may be coated first, and then the first opening K1 is etched, or a mask process may be directly adopted, the designed position of the first opening K1 is covered with a mask, and the polarizing layer 104 with the first opening K1 is directly coated, and the manufacturing process of the retardation film 106 may be the same as the manufacturing process of the polarizing layer 104. The display panel provided by the embodiment comprises the phase difference film positioned on one side of the polarizing layer close to the display layer, and the phase difference film can compensate the light transmission speed difference, so that the display effect is optimized. When the phase difference film has the second opening, as shown in fig. 5, the display panel is in the fingerprint identification stage, light emitted by the light emitting device 1021 irradiates the touch main body W, and the light can penetrate through the first via hole K1 and the second via hole K2 after being reflected by the touch main body W and then reaches the light sensing device, which is equivalent to reduction of light loss when the light penetrates through the polarizing layer and the phase difference film, and improves the fingerprint identification light transmittance, so that the light quantity received by the light sensing device is increased, and the fingerprint identification precision is improved.
Further, fig. 6 is a schematic diagram of a film structure of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 6, the display panel further includes a retardation film 106, the retardation film 106 is located on the side of the polarizing layer 104 close to the display layer 102, the display panel further includes a substrate 107, the substrate 107 is located on the side of the retardation film 106 far from the polarizing layer 104, the polarizing layer 104 is a liquid crystal coating type polarizing layer, and the retardation film 106 is a coating type retardation film. Alternatively, the retardation film 106 may be a single layer, or as shown in fig. 6, the retardation film 106 has the second opening K2; the second opening K2 coincides with the first opening K1 in an orthographic projection of the polarizing layer 104. In this embodiment, similar to the embodiment shown in fig. 5, the polarizing layer 104 is formed by performing a photo-alignment process or the like on the applied liquid crystal molecule layer and then orienting the liquid crystal molecules, and the retardation film 106 is formed by a coating process, and in this embodiment, the polarizing layer 104 may be formed by first coating the retardation film 106 on the surface of the substrate 107 side with the substrate 107 as a base and then coating the liquid crystal molecule layer on the retardation film 106. The fabrication process of the retardation film 106 and the polarizing layer 104 can be described with reference to the corresponding embodiment of fig. 5.
Further, fig. 7 is a schematic diagram of a film structure of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 7, the film layer where the cathode C is located in the display panel is a cathode layer 102C, and the cathode layer 102C has a third opening K3; at least a portion of the third opening K3 is located in the light transmissive area AA2T, wherein the non-light emitting area includes a light transmissive area AA2T and a non-light transmissive area AA2F, the light transmissive area AA2T is an area where a non-metal wire is located, and only a portion of the light transmissive area AA2T and the non-light transmissive area AA2F are illustrated in the cross-sectional view shown in fig. 7. In the display panel provided by the invention, the third opening is arranged on the cathode layer, and meanwhile, the cathodes of the light-emitting devices are still electrically connected with each other. In this embodiment, as shown in fig. 7, in the fingerprint recognition stage, the light reflected by the touch subject W can pass through the cathode layer 102C from the third opening K3, so that the light loss caused when the fingerprint recognition light passes through the cathode layer 102C is reduced (in general, the light loss rate is about 40%), the fingerprint recognition light transmittance is improved, the light amount received by the light sensing device is increased, and the fingerprint recognition accuracy is improved.
Optionally, in the display panel provided by the invention, the relative position relationship between the first opening and the third opening includes multiple conditions. In the direction perpendicular to the panel surface of the display panel, third openings can be correspondingly arranged below the first openings, wherein the area sizes of the first openings and the third openings can be different; or the first opening and the third opening are not overlapped in the direction perpendicular to the panel surface of the display panel.
Further, with continued reference to fig. 7, in the display panel provided by the embodiment of the invention, the orthographic projection of the third opening K3 on the polarizing layer 104 is located in the first opening K1. This embodiment corresponds to the third opening K3 being provided at the position where the first opening K1 is provided in the non-light-emitting region, wherein the area size of the third opening K3 may be the same as or different from that of the first opening K1, and fig. 7 shows the case where the area sizes are different. In this embodiment, at the fingerprint identification stage, partial fingerprint identification light can be by first trompil penetration polarisation layer, penetrates the cathode layer by the third trompil simultaneously, can reduce the light loss that light penetrated polarisation layer and cathode layer and caused simultaneously, effectively improves fingerprint identification light penetration rate, increases the light quantity that light sense device received, improves the fingerprint identification precision. In addition, the third opening is correspondingly arranged at the position corresponding to the first opening, namely, the cathode layer is not arranged correspondingly in the area where the polarizing layer is not arranged in the non-display area, so that the reflection of the cathode layer to ambient light in the display stage is reduced, the influence of the arrangement of the first opening on the display effect is further reduced, and the display effect of the display panel in the display stage is ensured.
In some alternative embodiments, the third opening is located in the light-transmissive region. The transparent region in the non-light-emitting region may be as shown in fig. 4, and a third opening may be disposed in the transparent region AA2T shown in fig. 4, in the display panel, the fingerprint identification light can only penetrate through the display layer and the array layer of the display panel from the transparent region AA2T to reach the light sensing device, in this embodiment, the third opening K3 is located in the transparent region AA2T, and in the fingerprint identification stage, at least part of the light reflected by the touch subject can penetrate through the cathode layer from the third opening K3 and then reach the light sensing device, so that light loss generated when the light penetrates through the cathode layer is reduced, which is equivalent to improving the penetration rate of the fingerprint identification light, thereby increasing the light received by the light sensing device and improving the fingerprint identification accuracy. In addition, when the display panel is manufactured, the third opening of the cathode layer can be arranged according to the shape and the position of the light-transmitting area.
Further, in some alternative embodiments, the display layer further comprises a light-emission auxiliary layer, the light-emission auxiliary layer having a fourth opening; at least part of the fourth opening is located in the light-transmitting area. In this embodiment, the fourth hole is located in the non-light-emitting region, and the fourth hole may be located in the light-transmitting region entirely, or may include both a portion located in the light-transmitting region and a portion located in the non-light-transmitting region. At the fingerprint identification stage, fingerprint identification light need pierce through the luminous auxiliary layer in the display layer and just can reach the light sense device, in this embodiment, set up the fourth trompil at luminous auxiliary layer, and the fourth trompil is at least partly located the printing opacity district, then at least partial fingerprint identification light can be by the luminous auxiliary layer of the downthehole penetration of fourth trompil, then reach the light sense device, the light loss that causes when can reducing light and pierce through luminous auxiliary layer, improve fingerprint identification light penetration rate, increase the light sense device received light volume.
Fig. 8 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention. As shown in fig. 8, the display layer 102 of the display panel further includes a hole injection layer 1023, a hole transport layer 1024, an electron transport layer 1025, or an electron injection layer 1026, wherein the hole injection layer 1023 and the hole transport layer 1024 are located between the anode a and the light-emitting layer b; an electron transport layer 1025 and an electron injection layer 1026 are located between the light-emitting layer b and the cathode c. Holes injected from the anode and electrons injected from the cathode combine in the light emitting layer to generate excitons, which fall from an excited state to a ground state and generate light. The meaning of the reference numerals in fig. 8 can be explained with reference to the corresponding embodiment of fig. 2. Alternatively, the light emission auxiliary layer in the present invention includes one or more of a hole injection layer 1023, a hole transport layer 1024, an electron transport layer 1025, or an electron injection layer 1026.
Optionally, the fourth opening is disposed in the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer in the display panel. Fig. 9 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention. As shown in fig. 9, fourth openings K4 are disposed in the hole injection layer 1023, the hole transport layer 1024, the electron transport layer 1025 and the electron injection layer 1026 of the display layer 102 of the display panel. In this embodiment, in the fingerprint identification stage, fingerprint identification light can be penetrated through each luminous auxiliary layer by the fourth hole to reduce the light loss that causes when light pierces through luminous auxiliary layer, improved fingerprint identification light luminousness.
Optionally, in the present invention, an orthographic projection of the fourth opening on the polarizing layer coincides with the first opening, that is, the fourth opening is correspondingly disposed at a position where the first opening is disposed in the non-light emitting region, as shown in fig. 9, in a fingerprint identification stage, a part of fingerprint identification light can penetrate through the polarizing layer through the first opening K1, and simultaneously, the light-emitting auxiliary layer is penetrated through by the fourth opening K4, so that light loss caused by the light penetrating through the polarizing layer and the light-emitting auxiliary layer can be reduced, and light transmittance is improved.
Further, fig. 10 is a schematic diagram of a film structure of another alternative implementation manner of the display panel according to the embodiment of the present invention. As shown in fig. 10, in the display panel, the polarizing layer 104 has a first opening K1, the retardation film 106 has a second opening K2, the cathode layer 102C has a third opening K3, and each light-emitting auxiliary layer has a fourth opening K4. Each of the light emission assisting layers includes a hole injection layer 1023, a hole transport layer 1024, an electron transport layer 1025, and an electron injection layer 1026. In this embodiment, in the fingerprint recognition stage, part of the fingerprint recognition light reflected by the touch subject W can penetrate through the polarizing layer 104 through the first opening K1, penetrate through the retardation film 106 through the second opening K2, penetrate through the cathode layer 102C through the third opening K3, and penetrate through each light-emitting auxiliary layer through the fourth opening K4, so that the light loss caused when the light penetrates through the display panel film layer can be effectively reduced, and the light transmittance is improved.
Further, the present invention also provides a display device, and fig. 11 is a schematic view of the display device provided in the embodiment of the present invention, and the display device provided in the present invention includes the display panel 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.
According to the embodiment, the display panel and the display device of the invention have the following beneficial effects:
in the display panel provided by the invention, the polarizing layer is provided with the first opening, and at least part of the first opening is positioned in the light-transmitting area. The light-transmitting area is an area through which light rays for fingerprint identification can penetrate, and the light rays for fingerprint identification can reach the light sensing device after penetrating through the light-transmitting area. In the fingerprint identification stage, the light reflected by the touch main body can penetrate through the polarizing layer from the first opening and then reach the light sensing device, so that light loss generated when the light penetrates through the polarizing layer is reduced, namely, the penetration rate of the fingerprint identification light is improved, the light quantity received by the light sensing device is increased, and the fingerprint identification precision is improved.
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 (11)
1. A display panel including a display region including a light-emitting region and a non-light-emitting region including a light-transmitting region and a non-light-transmitting region, the display panel comprising:
the array layer comprises a plurality of metal wires positioned in the non-light-emitting area;
a display layer located over the array layer, comprising:
a plurality of light emitting devices including an anode, a light emitting layer, and a cathode, wherein one of the light emitting regions includes one of the light emitting devices;
the plurality of light sensing devices are positioned on one side of the array layer, which is far away from the display layer;
the polarizing layer is positioned on one side, far away from the array layer, of the display layer and provided with a plurality of first openings which are positioned in the non-light-emitting area and different in size, wherein at least part of the first openings are positioned in the light-transmitting area, and the light-transmitting area is an area, in the non-light-emitting area, where the metal wire is not arranged;
and the phase difference film is positioned on one side of the polarizing layer, which is close to the display layer, and is provided with a second opening, and the orthographic projection of the second opening on the polarizing layer is superposed with the first opening.
2. The display panel according to claim 1,
the first openings are all located in the light-transmitting area.
3. The display panel according to claim 1,
the display panel further comprises a substrate and a plurality of light-emitting diodes,
the substrate is positioned on one side of the polarizing layer, which is far away from the phase difference film, the polarizing layer is a liquid crystal coating type polarizing layer, and the phase difference film is a coating type phase difference film; alternatively, the first and second electrodes may be,
the substrate is positioned on one side, away from the polarizing layer, of the phase difference film, the polarizing layer is a liquid crystal coating type polarizing layer, and the phase difference film is a coating type phase difference film.
4. The display panel according to claim 1,
the film layer where the cathode is located is a cathode layer, and the cathode layer is provided with third openings;
at least part of the third opening is located in the light-transmitting area.
5. The display panel according to claim 4,
the orthographic projection of the third opening on the polarizing layer is positioned in the first opening.
6. The display panel according to claim 5,
the third openings are all located in the light-transmitting area.
7. The display panel according to claim 1,
the display layer further comprises a light-emitting auxiliary layer having a fourth opening;
at least part of the fourth opening is located in the light-transmitting area.
8. The display panel according to claim 7,
the orthographic projection of the fourth opening on the polarizing layer is coincided with the first opening.
9. The display panel according to claim 7,
the light emission auxiliary layer includes one or more of a hole injection layer, a hole transport layer, an electron transport layer, or an electron injection layer.
10. The display panel according to claim 9,
the hole injection layer and the hole transport layer are located between the anode and the light emitting layer; the electron transport layer and the electron injection layer are located between the light emitting layer and the cathode.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.
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| CN201810358694.4A CN108598109B (en) | 2018-04-20 | 2018-04-20 | Display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109585674A (en) | 2018-11-13 | 2019-04-05 | 武汉华星光电半导体显示技术有限公司 | Display module and preparation method thereof, electronic device |
| CN109343257B (en) * | 2018-11-20 | 2021-09-17 | 厦门天马微电子有限公司 | Display panel and display device |
| CN109886140B (en) * | 2019-01-28 | 2021-05-14 | 上海天马有机发光显示技术有限公司 | Display panel, manufacturing method thereof and display device |
| CN110045557B (en) * | 2019-03-22 | 2021-06-01 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN109994047B (en) * | 2019-04-08 | 2021-10-12 | 京东方科技集团股份有限公司 | Full-screen display panel, manufacturing method thereof and full-screen display device |
| CN110137232B (en) * | 2019-05-27 | 2021-11-19 | 武汉天马微电子有限公司 | Organic light emitting display panel and display device |
| CN110649085A (en) * | 2019-10-23 | 2020-01-03 | 信利（惠州）智能显示有限公司 | Display panel and display device |
| CN110767724B (en) * | 2019-10-28 | 2022-04-22 | 京东方科技集团股份有限公司 | Display device and OLED panel thereof |
| CN111668388A (en) | 2020-06-23 | 2020-09-15 | 京东方科技集团股份有限公司 | Organic light emitting display and manufacturing method thereof |
| CN112186013B (en) * | 2020-09-25 | 2023-04-07 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| TWI777742B (en) * | 2021-05-18 | 2022-09-11 | 友達光電股份有限公司 | Fingerprint recognition device |
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