CN109036162B - Organic light-emitting display panel, preparation method and display device - Google Patents
Organic light-emitting display panel, preparation method and display device Download PDFInfo
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- CN109036162B CN109036162B CN201810997035.5A CN201810997035A CN109036162B CN 109036162 B CN109036162 B CN 109036162B CN 201810997035 A CN201810997035 A CN 201810997035A CN 109036162 B CN109036162 B CN 109036162B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- 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
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Abstract
The invention provides an organic light-emitting display panel, a preparation method and a display device. Wherein, an organic light emitting display panel comprises a fingerprint identification area and a non-fingerprint identification area; the fingerprint identification area comprises a first polarization module; the non-fingerprint identification area comprises a second polarization module; the first polarization module comprises a first polarization layer and a protective layer, and the protective layer has no polarization effect on light emitted through the first polarization layer; the second polarization module comprises a second polarization layer and an 1/4 wave plate protective layer, and the 1/4 wave plate protective layer has a polarization effect on light emitted by the second polarization layer; the light emitted by the first polarization layer is linearly polarized light; the light emitted through the second polarization layer is linearly polarized light. When the organic light-emitting display panel is used in a strong light environment, a user wearing the polarized sunglasses can clearly see the display of the organic light-emitting display panel.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to an organic light-emitting display panel, a preparation method and a display device.
[ background of the invention ]
Fig. 1 is a schematic cross-sectional view of a conventional organic light emitting display panel 100. The organic light emitting display panel 100 includes a fingerprint identification region 101 and a non-fingerprint identification region 102. The fingerprint identification region 101 includes a first polarization module 110, and the non-fingerprint identification region 102 includes a second polarization module 120. The first and second polarization modules 110 and 120 include linear polarizers. The organic light emitting display panel 100 further includes an organic light emitting module 130. The fingerprint identification area 101 further comprises a light-sensitive fingerprint identification module 140. The organic light emitting module 130 emits unpolarized light that is changed into linearly polarized light by the first polarization module 110 in the fingerprint identification area 101 and is changed into linearly polarized light by the second polarization module 120 in the non-fingerprint identification area 102. When the organic light emitting display panel 100 recognizes a fingerprint, a finger contacting the fingerprint recognition area 101 reflects linearly polarized light of the first polarization module 110, and the light-sensitive fingerprint recognition module 140 receives the reflected linearly polarized light. When the organic light emitting display panel 100 emits light for display, the linearly polarized light of the first polarization module 110 and the second polarization module 120 reaches the environment and enters the field of view of the user.
However, the vibration direction of linearly polarized light is generally different from the transmission direction of the polarizing sunglasses. When the organic light emitting display panel 100 is used in a strong light environment and a user wears the polarized sunglasses, linearly polarized light from the fingerprint identification region 101 and the non-fingerprint identification region 102 rarely passes through the polarized sunglasses and enters the field of view of the user. Accordingly, a user wearing polarized sunglasses in a strong light environment cannot see the display of the organic light-emitting display panel 100 clearly.
[ summary of the invention ]
In order to solve the above problems, the present invention provides an organic light emitting display panel, a method of manufacturing the same, and a display device.
In one aspect, the present invention provides an organic light emitting display panel including a fingerprint identification region and a non-fingerprint identification region;
the fingerprint identification area comprises a first polarization module;
the non-fingerprint identification area comprises a second polarization module;
the first polarization module comprises a first polarization layer and a protective layer, and the protective layer has no polarization effect on light emitted through the first polarization layer;
the second polarization module comprises a second polarization layer and an 1/4 wave plate protective layer, and the 1/4 wave plate protective layer has a polarization effect on light emitted through the second polarization layer;
the light emitted by the first polarization layer is linearly polarized light;
the light emitted by the second polarization layer is linearly polarized light.
Optionally, the linearly polarized light emitted by the second polarization layer is converted into circularly polarized light or elliptically polarized light by the 1/4 wave plate protection layer;
the linearly polarized light emitted by the first polarization layer is linearly polarized after passing through the protective layer.
Optionally, the first polarizing layer comprises a polyvinyl alcohol film; the second polarizing layer comprises a polyvinyl alcohol film;
the protective layer comprises a cellulose triacetate film;
the 1/4 wave plate protection layer comprises a cyclic olefin polymer film.
Optionally, an included angle between the slow axis of the 1/4 wave plate protection layer and the absorption axis of the second polarization layer is 45 degrees.
Optionally, an included angle between the slow axis of the 1/4 wave plate protection layer and the absorption axis of the second polarization layer is greater than 45 degrees or less than 45 degrees.
Optionally, the organic light emitting display panel further comprises a protective glass layer and an organic light emitting module;
the first polarization module and the second polarization module are arranged between the protective glass layer and the organic light-emitting module;
the first polarization module further comprises a first 1/4 wave-plate layer, the second polarization module further comprises a second 1/4 wave-plate layer;
the protective layer, the first polarizing layer and the first 1/4 wave plate layer are sequentially stacked and arranged from one side, close to the organic light-emitting module, of the protective glass layer;
the 1/4 wave plate protective layer, the second polarizing layer and the second 1/4 wave plate layer are sequentially stacked from the side, close to the organic light-emitting module, of the protective glass layer.
Optionally, the first and second polarization modules further comprise a pressure sensitive adhesive layer;
the pressure sensitive adhesive layer is disposed directly between the first polarizing layer and the first 1/4 wave plate layer, and directly between the second polarizing layer and the second 1/4 wave plate layer.
Optionally, the ratio of the surface area of the fingerprint identification region to the surface area of the non-fingerprint identification region is less than 1%.
Optionally, the organic light emitting display panel further comprises a light sensing fingerprint identification module, wherein the light sensing fingerprint identification module comprises a light sensing unit, an identification unit and a feedback unit;
the light sensing unit is used for sensing received light;
the identification unit is used for identifying the valleys and ridges of the fingerprint according to the light received by the light sensing unit;
the feedback unit is used for feeding back the fingerprint result identified by the identification unit to the driving chip.
In another aspect, the present invention provides an organic light emitting display device including the organic light emitting display panel.
In still another aspect, the present invention provides a method for manufacturing an organic light emitting display panel, the method being used to manufacture the organic light emitting display panel;
the preparation method comprises the following steps:
coating the cellulose triacetate film on the protective glass layer in the area corresponding to the fingerprint identification area to form the protective layer;
coating the cycloolefin polymer film on the protective glass layer in the area corresponding to the non-fingerprint identification area to form the 1/4 wave plate protective layer;
coating the polyvinyl alcohol film on the protective layer and the 1/4 wave plate protective layer on the side far away from the protective glass layer to form the first polarizing layer and the second polarizing layer;
coating and forming the pressure-sensitive adhesive on one side of the first polarizing layer and the second polarizing layer far away from the protective glass layer;
coating the pressure sensitive adhesive on the side away from the protective glass layer to form the first 1/4 wave plate layer and the second 1/4 wave plate layer;
and aligning and attaching the protective glass layer and the organic light-emitting module.
In still another aspect, the present invention provides a method for manufacturing an organic light emitting display panel, the method being used to manufacture the organic light emitting display panel;
the preparation method comprises the following steps:
sequentially coating the area of the organic light-emitting module corresponding to the fingerprint identification area to form the first 1/4 wave plate layer, the pressure-sensitive adhesive and the first polarization layer;
sequentially coating the area, corresponding to the non-fingerprint identification area, of the organic light-emitting module to form the second 1/4 wave plate layer, the pressure-sensitive adhesive and the second polarization layer;
coating the cellulose triacetate film on the first polarizing layer to form the protective layer;
and coating the cyclic olefin polymer film on the second polarizing layer to form the 1/4 wave plate protective layer.
The organic light-emitting display panel adopts the first polarization module in the fingerprint identification area and adopts the second polarization module in the non-fingerprint identification area. The first polarization module includes a first polarization layer and a protective layer. The first polarizing layer is a crystal having a transmission direction of light, and can change the vibration direction of light. The protective layer does not alter the direction of light vibration. The unpolarized light is converted into linearly polarized light through the first polarizing layer, and the linearly polarized light is still linearly polarized light through the protective layer. The fingerprint identification area emits linearly polarized light. The vibration direction of the unpolarized light faces arbitrarily in a plane perpendicular to the propagation direction, and the vibration direction of the linearly polarized light is in a plane including the propagation direction. The light vibrating along the transmission direction of the first polarizing layer in the unpolarized light can be transmitted through the first polarizing layer and becomes linearly polarized light. The second polarization module includes a second polarization layer and an 1/4 wave plate protection layer. The second polarizing layer is a crystal having a transmission direction of light, and can change the vibration direction of light. 1/4 the wave plate protective layer can change the vibration direction of light. The unpolarized light is converted into linearly polarized light through the second polarizing layer, and the linearly polarized light is converted into other polarized light capable of penetrating through the polarizing sunglasses through the 1/4 wave plate protective layer. The non-fingerprint identification area emits light with other polarization of non-linear polarization. The 1/4 wave plate protective layer is a birefringent crystal, linearly polarized light is divided into ordinary light and extraordinary light when entering the 1/4 wave plate protective layer, the phase difference of the ordinary light and the extraordinary light in the 1/4 wave plate protective layer is equal to odd times of pi/2, and the ordinary light and the extraordinary light are superposed into other polarized light of the non-linearly polarized light when leaving the 1/4 wave plate protective layer. When the organic light-emitting display panel is used in a strong light environment and a user wears the polarized sunglasses, other polarized light from the non-fingerprint identification area can penetrate through the polarized sunglasses and enter the visual field of the user. Thus, a user wearing polarized sunglasses in a strong light environment can clearly see the display of the organic light-emitting display panel.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a conventional organic light emitting display panel 100;
fig. 2 is a schematic plan view of an organic light emitting display panel 200 according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a fingerprint identification area 201 of an OLED panel 200 according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view illustrating a non-fingerprint identification area 202 of an OLED panel 200 according to an embodiment of the present invention;
FIG. 5A is a schematic polarization diagram of the second polarization layer 221 and the 1/4 wave plate protection layer 222 in the OLED panel 200 according to another embodiment of the present invention;
fig. 5B is a schematic polarization diagram of the first polarization layer 211 and the protection layer 212 in the organic light emitting display panel 200 according to another embodiment of the present invention;
FIG. 6 is a schematic polarization diagram of the second polarization layer 221 and the 1/4 wave plate protection layer 222 in the OLED panel 200 according to another embodiment of the present invention;
FIG. 7 is a block diagram of a photosensitive fingerprint identification module 250 in an OLED panel 200 according to another embodiment of the present invention;
fig. 8 is a schematic plan view of an organic light emitting display device 20 according to another embodiment of the present invention;
fig. 9 is a flowchart of a method 300 for fabricating an organic light emitting display panel 200 according to another embodiment of the present invention;
fig. 10 is a flowchart of a method 400 for fabricating an organic light emitting display panel 200 according to another embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Fig. 2 is a schematic plan view of an organic light emitting display panel 200 according to an embodiment of the present invention. Fig. 3 is a schematic cross-sectional view illustrating a fingerprint identification area 201 in an organic light emitting display panel 200 according to an embodiment of the invention. Fig. 4 is a schematic cross-sectional view illustrating a non-fingerprint identification area 202 of an organic light emitting display panel 200 according to an embodiment of the invention.
As shown in fig. 2 to 4, the organic light emitting display panel 200 includes a fingerprint identification region 201 and a non-fingerprint identification region 202; the fingerprint identification area 201 includes a first polarization module 210; the non-fingerprint identification region 202 includes a second polarization module 220; the first polarization module 210 includes a first polarization layer 211 and a protective layer 212, and the protective layer 212 has no polarization effect on light emitted through the first polarization layer 211; the second polarization module 220 includes a second polarization layer 221 and an 1/4 wave plate protection layer 222, wherein the 1/4 wave plate protection layer 222 has a polarization effect on light emitted through the second polarization layer 221; wherein, the light emitted through the first polarization layer 211 is linearly polarized light; the light emitted through the second polarizing layer 221 is linearly polarized light.
As shown in fig. 1, in the conventional organic light emitting display panel 100, the organic light emitting module 130 emits unpolarized light, which is converted into linearly polarized light by the first polarization module 110 in the fingerprint identification area 101 and converted into linearly polarized light by the second polarization module 120 in the fingerprint identification area 102. The vibration direction of linearly polarized light is generally different from the transmission direction of the polarizing sunglasses. When the organic light emitting display panel 100 is used in a strong light environment and a user wears the polarized sunglasses, linearly polarized light from the fingerprint identification region 101 and the non-fingerprint identification region 102 rarely passes through the polarized sunglasses and enters the field of view of the user. Accordingly, a user wearing polarized sunglasses in a strong light environment cannot see the display of the organic light-emitting display panel 100 clearly.
In an embodiment of the present invention, the organic light emitting display panel 200 employs a first polarization module 210 in the fingerprint identification area 201 and a second polarization module 220 in the non-fingerprint identification area 202. The first polarization module 210 includes a first polarization layer 211 and a protective layer 212. The first polarizing layer 211 is a crystal having one vibration transmission direction, and can change the vibration direction of light. The protective layer 212 may not change the vibration direction of the light. The unpolarized light is changed into linearly polarized light through the first polarizing layer 211, and the linearly polarized light is still linearly polarized light through the protective layer 212. The fingerprint identification area 201 emits linearly polarized light. The vibration direction of the unpolarized light faces arbitrarily in a plane perpendicular to the propagation direction, and the vibration direction of the linearly polarized light is in a plane including the propagation direction. Of the unpolarized light, light vibrating in the transmission direction of the first polarizing layer 211 may be transmitted through the first polarizing layer 211 to become linearly polarized light. The second polarization module 220 includes a second polarization layer 221 and an 1/4 wave plate protection layer 222. The second polarizing layer 221 is a crystal having one vibration transmission direction, and can change the vibration direction of light. 1/4 the wave plate protection layer 222 can change the vibration direction of light. The unpolarized light is converted into linearly polarized light by the second polarizing layer 221, and the linearly polarized light is converted into other polarized light which can be transmitted through the polarizing sunglasses by the 1/4 wave plate protection layer 222. The non-fingerprint identification area 202 emits light of other polarization than linearly polarized light. The 1/4 wave plate protective layer 222 is a birefringent crystal, linearly polarized light is divided into ordinary light and extraordinary light when entering the 1/4 wave plate protective layer 222, the phase difference of the ordinary light and the extraordinary light in the 1/4 wave plate protective layer 222 is equal to odd times of pi/2, and the ordinary light and the extraordinary light are superposed into other polarized light of the non-linearly polarized light when leaving the 1/4 wave plate protective layer 222. When the organic light-emitting display panel 200 is used in a glare environment with polarized sunglasses worn by a user, other polarized light from the non-fingerprint identification region 202 may pass through the polarized sunglasses and enter the user's field of view. Thus, a user wearing polarized sunglasses in a strong light environment can clearly see the display of the organic light-emitting display panel 200. In addition, the protective layer 212 may protect the first polarizing layer 211 from damage. The 1/4 wave plate protection layer 222 can protect the second polarization layer 221 from damage.
Fig. 5A is a schematic polarization diagram of the second polarization layer 221 and the 1/4 wave plate protection layer 222 in the organic light emitting display panel 200 according to another embodiment of the present invention. Fig. 5B is a schematic polarization diagram of the first polarization layer 211 and the protection layer 212 in the organic light emitting display panel 200 according to another embodiment of the invention. As shown in fig. 5A, the linearly polarized light emitted through the second polarization layer 221 is converted into circularly polarized light through the 1/4 wave plate protection layer 222; as shown in fig. 5B, the linearly polarized light emitted through the second polarization layer 221 is converted into elliptically polarized light through the 1/4 wave plate protection layer 222; the linearly polarized light emitted through the first polarizing layer 211 is linearly polarized after passing through the protective layer 212.
In another embodiment of the present invention, the non-fingerprint identification region 202 of the organic light emitting display panel 200 uses the second polarization layer 221 and the 1/4 wave plate protection layer 222 to emit circularly polarized light or elliptically polarized light. The second polarizing layer 221 is a crystal having one transmission direction, and light of unpolarized light that vibrates along the transmission direction of the second polarizing layer 221 may be transmitted through the second polarizing layer 221 and become linearly polarized light. The 1/4 wave plate protective layer 222 is a birefringent crystal, the linearly polarized light is divided into ordinary light and extraordinary light when entering the 1/4 wave plate protective layer 222, the phase difference of the ordinary light and the extraordinary light in the 1/4 wave plate protective layer 222 is equal to odd times of pi/2, and the ordinary light and the extraordinary light can be superimposed into circularly polarized light or elliptically polarized light when leaving the 1/4 wave plate protective layer 222. The ends of the light vectors of circularly polarized light constitute circular trajectories in a plane perpendicular to the propagation direction, and the ends of the light vectors of elliptically polarized light constitute elliptical trajectories in a plane perpendicular to the propagation direction. Light of circularly polarized light or elliptically polarized light that vibrates along the transmission direction of the polarizing sunglasses may be transmitted through the polarizing sunglasses. When the organic light emitting display panel 200 is used in a glare environment and a user wears polarized sunglasses, circularly polarized light or elliptically polarized light from the non-fingerprint identification region 202 may pass through the polarized sunglasses and enter the user's field of view. Thus, a user wearing polarized sunglasses in a strong light environment can clearly see the display of the organic light-emitting display panel 200.
In the organic light emitting display panel 200, the first polarizing layer 211 includes a polyvinyl alcohol film; the second polarizing layer 221 includes a polyvinyl alcohol film; the protective layer 212 comprises a cellulose triacetate film; 1/4 the wave plate protection layer 222 includes a cyclic olefin polymer film.
In another embodiment of the present invention, the organic light emitting display panel 200 uses polyvinyl alcohol films as the materials of the first and second polarizing layers 211 and 221. The polyvinyl alcohol film itself has high light transmittance. The polyvinyl alcohol film used for the polarizing film layer is generally subjected to dyeing treatment and stretching treatment. Before dyeing treatment, molecular chains of the polyvinyl alcohol film are distributed in a disordered way. In the dyeing treatment, the surface of the polyvinyl alcohol film adsorbs a dye layer, and the dye layer comprises dye molecules. After dyeing treatment, the molecular chains of the polyvinyl alcohol film are still distributed disorderly, and the dye molecules of the dye layer are also distributed disorderly. In the stretching treatment, molecular chains of the polyvinyl alcohol film are orderly distributed due to the action of stretching external force, and dye molecules of the dye layer are orderly distributed. Gaps which are parallel to each other exist among the dye molecules which are distributed orderly. The light vibrating along the gap direction of the dye molecules in the unpolarized light can be transmitted through the dye layer and the polyvinyl alcohol film to become linearly polarized light. In addition, a cellulose triacetate film is used as the protective layer 212, and a cycloolefin polymer film is used as the 1/4 wave plate protective layer 222. The cellulose triacetate film can stretch and protect the polyvinyl alcohol film. The cycloolefin polymer film can stretch and protect the polyvinyl alcohol film, and linearly polarized light can be changed into circularly polarized light or elliptically polarized light through the cycloolefin polymer film.
Fig. 6 is a schematic polarization diagram of the second polarization layer 221 and the 1/4 wave plate protection layer 222 in the organic light emitting display panel 200 according to another embodiment of the present invention.
In the organic light emitting display panel 200, an angle α between the slow axis S of the 1/4 wave plate protection layer 222 and the absorption axis P of the second polarization layer 221 may be set to 45 degrees.
In the organic light emitting display panel 200 according to another embodiment of the present invention, an included angle α between the slow axis S of the wave plate protection layer 222 and the absorption axis P of the second polarization layer 221 is set to be 45 degrees at 1/4. The second polarizing layer 221 is a crystal having one transmission direction, and light of unpolarized light that vibrates along the transmission direction of the second polarizing layer 221 may be transmitted through the second polarizing layer 221 and become linearly polarized light. The absorption axis P of the second polarizing layer 221 is perpendicular to the polarization direction of the linearly polarized light transmitted through the second polarizing layer 221. The 1/4 wave plate protection layer 222 is a birefringent crystal, linearly polarized light is divided into ordinary light and extraordinary light when entering the 1/4 wave plate protection layer 222, the phase difference of the ordinary light and the extraordinary light in the 1/4 wave plate protection layer 222 is equal to odd times of pi/2, and the ordinary light and the extraordinary light can be superposed when leaving the 1/4 wave plate protection layer 222. 1/4 the slow axis S of the wave plate protection layer 222 is along the direction of the light vector propagating at a slower speed in both the ordinary light and the extraordinary light. When the included angle α between the slow axis S of the 1/4 wave plate protection layer 222 and the absorption axis P of the second polarization layer 221 is 45 degrees, the ordinary light and the extraordinary light are superimposed into circularly polarized light when leaving the 1/4 wave plate protection layer 222. The circularly polarized light can be transmitted through the polarizing sunglasses, and the transmittance of the circularly polarized light transmitted through the polarizing sunglasses is higher than that of the elliptically polarized light transmitted through the polarizing sunglasses.
In the organic light emitting display panel 200, an angle α between the slow axis S of the 1/4 wave plate protection layer 222 and the absorption axis P of the second polarization layer may be greater than 45 degrees or less than 45 degrees. When the included angle α between the slow axis S of the 1/4 wave plate protection layer 222 and the absorption axis P of the second polarization layer 221 is greater than 45 degrees or less than 45 degrees, the linearly polarized light is divided into ordinary light and extraordinary light when entering the 1/4 wave plate protection layer 222, and the ordinary light and the extraordinary light are superimposed into elliptically polarized light when leaving the 1/4 wave plate protection layer 222. The elliptically polarized light may be transmitted through polarized sunglasses.
As shown in fig. 3 and 4, the organic light emitting display panel 200 further includes a protective glass layer 240 and an organic light emitting module 230; the first and second polarization modules 210 and 220 are disposed between the protective glass layer 240 and the organic light emitting module 230; the first polarization module 210 further includes a first 1/4 wave-plate layer 213; the second polarization module 220 further includes a second 1/4 wave-plate layer 223; the self-protection glass layer 240 is close to one side of the organic light-emitting module 230, and the protection layer 212, the first polarization layer 211 and the first 1/4 wave plate layer 213 are sequentially stacked; the self-protecting glass layer 240 is disposed adjacent to the organic light emitting module 230, and the 1/4 wave plate protecting layer 222, the second polarizing layer 221, and the second 1/4 wave plate layer 223 are sequentially stacked.
When the organic light emitting display panel 200 is used in a strong light environment, strong light is irradiated in the organic light emitting display panel 200, reflected into the user's field of view, causing glare.
In another embodiment of the present invention, the organic light emitting display panel 200 includes a protective glass layer 240, a protective layer 212, a first polarization layer 211, a first 1/4 wave plate layer 213, and an organic light emitting module 230 disposed in the fingerprint identification region 201, and a protective glass layer 240, a 1/4 wave plate protective layer 222, a second polarization layer 221, a second 1/4 wave plate layer 223, and an organic light emitting module 230 disposed in the non-fingerprint identification region 202. When the organic light emitting display panel 200 is used in a strong light environment, strong unpolarized light passes through the protective glass layer 240, enters the first polarization module 210 and the second polarization module 220, passes through the protective layer 212, the first polarization layer 211, the first 1/4 wave plate layer 213, or passes through the 1/4 wave plate protective layer 222, the second polarization layer 221, and the second 1/4 wave plate layer 223. In the fingerprint identification area 201, the strongly unpolarized light is still unpolarized light through the protection layer 212, the unpolarized light is changed into linearly polarized light through the first polarization layer 211, the linearly polarized light is changed into circularly polarized light through the first 1/4 wave plate layer 213, the circularly polarized light is reflected when entering the organic light emitting display panel 200, for example, the circularly polarized light is irradiated on the organic light emitting module 230 for reflection, the reflected circularly polarized light is changed into reflected linearly polarized light through the first 1/4 wave plate layer 213, the polarization direction of the reflected linearly polarized light is generally different from the transmission direction of the first polarization layer 211, and the reflected linearly polarized light cannot transmit through the first polarization layer 211. This can avoid glare caused by intense light being reflected in the fingerprint identification region 201 into the user's field of view. Non-fingerprint identification area 202, the same. This may avoid glare caused by intense light being reflected into the user's field of view in the non-fingerprint identification region 202.
As shown in fig. 3 and 4, the first and second polarizing modules 210 and 220 further include pressure sensitive adhesive layers 214, 224; the pressure sensitive adhesive layer 214 is disposed directly between the first polarizing layer 211 and the first 1/4 wave plate layer 213, and the pressure sensitive adhesive layer 224 is disposed directly between the second polarizing layer 221 and the second 1/4 wave plate layer 223. In the embodiment of the present invention, the pressure sensitive adhesive layer 214 fixes the first polarizing layer 211 and the first 1/4 wave plate layer 213, and the pressure sensitive adhesive layer 224 fixes the second polarizing layer 221 and the second 1/4 wave plate layer 223. In addition, the pressure-sensitive adhesive layers 214 and 224 have high light transmittance, and do not affect the light transmission in the first polarizing layer 211 and the first 1/4 wave plate layer 213 or the light transmission in the second polarizing layer 221 and the second 1/4 wave plate layer 223.
In an organic light emitting display panel 200 according to another embodiment of the present invention, a ratio of a surface area of the fingerprint identification region 201 to a surface area of the non-fingerprint identification region 202 is less than 1%. The organic light emitting display panel 200 emits circularly polarized light or elliptically polarized light in the non-fingerprint identification region 202, but emits linearly polarized light in the fingerprint identification region 201. Here, the ratio of the surface area of the fingerprint identification region 201 to the surface area of the non-fingerprint identification region 202 is set to be less than 1%. At this time, the surface area of the fingerprint identification area 201 is extremely minute. Such a fingerprint recognition area 201 does not sufficiently affect the overall visual effect of the user viewing the organic light emitting display panel 200 even if linearly polarized light is emitted and cannot enter the user's visual field through the polarized sunglasses.
As shown in fig. 3, the organic light emitting display panel 200 further includes a light sensing fingerprint identification module 250 in the fingerprint identification area 201.
Fig. 7 is a block diagram illustrating a photosensitive fingerprint identification module 250 in an organic light emitting display panel 200 according to another embodiment of the present invention. The light-sensing fingerprint identification module 250 comprises a light sensing unit 251, an identification unit 252 and a feedback unit 253; the light sensing unit 251 is used for sensing received light; the identification unit 252 is configured to identify valleys and ridges of the fingerprint according to the light received by the light sensing unit 251; the feedback unit 253 is used for feeding back the fingerprint result identified by the identification unit 252 to the driving chip.
Fig. 8 is a schematic plan view of an organic light emitting display device 20 according to another embodiment of the present invention. The organic light emitting display device 20 includes an organic light emitting display panel 200. The organic light emitting display panel 200 is described in detail in the above embodiments, and is not described in detail. The organic light emitting display device 20 may be an electronic apparatus having a display function, such as a mobile phone, a computer, and a television.
Fig. 9 is a flowchart of a method 300 for fabricating an organic light emitting display panel 200 according to another embodiment of the invention.
The manufacturing method 300 is used to manufacture the organic light emitting display panel 200, and includes:
step S301, coating a cellulose triacetate film on the protective glass layer 240 in the area corresponding to the fingerprint identification area 201 to form a protective layer 212;
step S302, coating a cycloolefin polymer film on the protective glass layer 240 in the area corresponding to the non-fingerprint identification area 202 to form an 1/4 wave plate protective layer 222;
step S303, coating a polyvinyl alcohol film on the protection layer 212 and 1/4 wave plate protection layer 222 away from the protection glass layer 240 to form a first polarization layer 211 and a second polarization layer 221;
step S304, coating and forming pressure- sensitive adhesives 214 and 224 on the first polarizing layer 211 and the second polarizing layer 221 at the side far away from the protective glass layer 240;
step S305, coating and forming a first 1/4 wave plate layer 213 and a second 1/4 wave plate layer 223 on the sides, far away from the protective glass layer 240, of the pressure- sensitive adhesives 214 and 224;
in step S306, the cover glass layer 240 and the organic light emitting module 230 are aligned and bonded.
Fig. 10 is a flowchart of a method 400 for fabricating an organic light emitting display panel 200 according to another embodiment of the invention.
The preparation method 400 is used for preparing the organic light emitting display panel 200, and includes:
step S401, sequentially coating and forming a first 1/4 wave plate layer 213, a pressure-sensitive adhesive 214 and a first polarization layer 211 on the organic light-emitting module 230 in the area corresponding to the fingerprint identification area 201;
step S402, coating a second 1/4 wave plate layer 223, a pressure-sensitive adhesive 224 and a second polarization layer 221 on the organic light-emitting module 230 in sequence in the area corresponding to the non-fingerprint identification area 202;
step S403, coating a triacetylcellulose film on the first polarizing layer 211 to form a protective layer 212;
in step S404, a cycloolefm polymer film is coated on the second polarization layer 221 to form 1/4 wave plate protection layer 222.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An organic light emitting display panel, comprising a fingerprint identification region and a non-fingerprint identification region;
the fingerprint identification area comprises a first polarization module;
the non-fingerprint identification area comprises a second polarization module;
the ratio of the surface area of the fingerprint identification region to the surface area of the non-fingerprint identification region is less than 1%;
the organic light emitting display panel further comprises a protective glass layer and an organic light emitting module;
the first polarization module and the second polarization module are arranged between the protective glass layer and the organic light-emitting module;
the first polarization module comprises a first polarization layer, a protective layer and a first 1/4 wave plate layer, and the protective layer has no polarization effect on light emitted through the first polarization layer;
the protective layer, the first polarizing layer and the first 1/4 wave plate layer are sequentially stacked and arranged from one side, close to the organic light-emitting module, of the protective glass layer;
the second polarization module comprises a second polarization layer, an 1/4 wave plate protection layer and a second 1/4 wave plate layer, and the 1/4 wave plate protection layer has a polarization effect on light emitted through the second polarization layer;
the 1/4 wave plate protection layer, the second polarization layer and the second 1/4 wave plate layer are sequentially stacked and arranged from one side, close to the organic light-emitting module, of the protection glass layer;
the light emitted by the first polarization layer is linearly polarized light;
the light emitted by the second polarization layer is linearly polarized light.
2. The organic light-emitting display panel according to claim 1, wherein linearly polarized light emitted through the second polarizing layer is converted into circularly polarized light or elliptically polarized light through the 1/4 wave plate protective layer;
the linearly polarized light emitted by the first polarization layer is linearly polarized after passing through the protective layer.
3. The organic light-emitting display panel according to claim 2, wherein the first polarizing layer comprises a polyvinyl alcohol film; the second polarizing layer comprises a polyvinyl alcohol film;
the protective layer comprises a cellulose triacetate film;
the 1/4 wave plate protection layer comprises a cyclic olefin polymer film.
4. The organic light-emitting display panel according to claim 2, wherein an included angle between a slow axis of the 1/4 wave plate protection layer and an absorption axis of the second polarization layer is 45 degrees.
5. The organic light-emitting display panel according to claim 2, wherein an included angle between a slow axis of the 1/4 wave plate protection layer and an absorption axis of the second polarization layer is greater than 45 degrees or less than 45 degrees.
6. The organic light-emitting display panel according to claim 1, wherein the first and second polarization modules further comprise a pressure-sensitive adhesive layer;
the pressure sensitive adhesive layer is disposed directly between the first polarizing layer and the first 1/4 wave plate layer, and directly between the second polarizing layer and the second 1/4 wave plate layer.
7. The organic light emitting display panel according to any one of claims 1 to 6, further comprising a light sensing fingerprint identification module, wherein the light sensing fingerprint identification module comprises a light sensing unit, an identification unit and a feedback unit;
the light sensing unit is used for sensing received light;
the identification unit is used for identifying the valleys and ridges of the fingerprint according to the light received by the light sensing unit;
the feedback unit is used for feeding back the fingerprint result identified by the identification unit to the driving chip.
8. An organic light emitting display device, characterized in that the organic light emitting display device comprises the organic light emitting display panel according to any one of claims 1 to 7.
9. A method for manufacturing an organic light emitting display panel, characterized in that the method is used for manufacturing the organic light emitting display panel according to any one of claims 1 to 7;
the preparation method comprises the following steps:
coating a cellulose triacetate film on the protective glass layer in the area corresponding to the fingerprint identification area to form the protective layer;
coating a cyclic olefin polymer film on the protective glass layer in the area corresponding to the non-fingerprint identification area to form the 1/4 wave plate protective layer;
coating polyvinyl alcohol films on the protective layer and the 1/4 wave plate protective layer on the side far away from the protective glass layer to form the first polarizing layer and the second polarizing layer;
coating and forming a pressure-sensitive adhesive on one side of the first polarizing layer and the second polarizing layer far away from the protective glass layer;
coating the pressure sensitive adhesive on the side away from the protective glass layer to form the first 1/4 wave plate layer and the second 1/4 wave plate layer;
and aligning and attaching the protective glass layer and the organic light-emitting module.
10. A method for manufacturing an organic light emitting display panel, characterized in that the method is used for manufacturing the organic light emitting display panel according to any one of claims 1 to 7;
the preparation method comprises the following steps:
sequentially coating the area of the organic light-emitting module corresponding to the fingerprint identification area to form the first 1/4 wave plate layer, the pressure-sensitive adhesive and the first polarization layer;
sequentially coating the area corresponding to the non-fingerprint identification area on the organic light-emitting module to form the second 1/4 wave plate layer, the pressure-sensitive adhesive and the second polarization layer;
coating a cellulose triacetate film on the first polarizing layer to form the protective layer;
and coating a cycloolefine polymer film on the second polarizing layer to form the 1/4 wave plate protective layer.
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| CN110298315B (en) * | 2019-06-28 | 2021-07-30 | 上海天马微电子有限公司 | Display panel and display device |
| CN113628533A (en) * | 2021-08-23 | 2021-11-09 | 联想(北京)有限公司 | Electronic equipment and method for collecting external environment light |
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| CN102890362B (en) * | 2012-09-27 | 2015-04-15 | 京东方科技集团股份有限公司 | Display device |
| CN104730613A (en) * | 2015-03-30 | 2015-06-24 | 京东方科技集团股份有限公司 | Polarized lens, display panel and liquid crystal display device |
| CN204925549U (en) * | 2015-09-18 | 2015-12-30 | 上海冠显光电科技有限公司 | Visual liquid crystal disply device under outdoor sunshine |
| CN107085256A (en) * | 2016-02-16 | 2017-08-22 | 上海和辉光电有限公司 | A kind of rotatory polarization piece and preparation method thereof, touch-control display panel |
| CN106339682B (en) * | 2016-08-26 | 2019-09-06 | 京东方科技集团股份有限公司 | The display panel of fingerprint recognition and the display device of fingerprint recognition |
| CN106773229B (en) * | 2017-03-10 | 2018-11-09 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition display device and its driving method |
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