CN109786577B - OLED screen body for fingerprint identification device and fingerprint identification device - Google Patents
OLED screen body for fingerprint identification device and fingerprint identification device Download PDFInfo
- Publication number
- CN109786577B CN109786577B CN201910090096.8A CN201910090096A CN109786577B CN 109786577 B CN109786577 B CN 109786577B CN 201910090096 A CN201910090096 A CN 201910090096A CN 109786577 B CN109786577 B CN 109786577B
- Authority
- CN
- China
- Prior art keywords
- light
- layer
- electrode
- fingerprint identification
- identification device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Image Input (AREA)
- Electroluminescent Light Sources (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The application discloses an OLED screen body for a fingerprint identification device and the fingerprint identification device, wherein the OLED screen body comprises a substrate and a light emitting part packaged on the substrate through a packaging cover plate; the light emitting component comprises an organic functional layer, and a reflecting electrode and a base electrode which are respectively positioned at two sides of the organic functional layer; a luminescent layer and a plurality of organic layers positioned at two sides of the luminescent layer are arranged in the organic functional layer; the reflecting electrode is positioned on one side of the light-emitting surface far away from the light-emitting layer; the distance between the reflecting electrode and the luminous layer satisfies a set formula. This application carries out unique selection through the distance between reflecting electrode and the luminescent layer in the OLED screen body, and the light under with fixed wavelength is mostly restricted with the form of total reflection by base plate or encapsulation apron, perhaps launches with the form of side direction light, has strengthened received signal's intensity, precision to fingerprint identification device's discernment sensitivity has been improved.
Description
Technical Field
The present disclosure relates generally to the field of fingerprint identification technology, and more particularly, to an OLED screen for a fingerprint identification device and a fingerprint identification device.
Background
In recent years, with the development of display lighting technology, mobile products with biometric identification function, especially fingerprint identification technology, have been developed gradually as the current mobile phone security and various enterprise security devices have been commonly applied, and people pay attention to the technology of fingerprint identification in the display area, and at present, many fingerprint identification devices have been designed for optical fingerprint identification in a series of ways. For example, the content disclosed in the Chinese invention patent with the application number of 201510096644. X; in the patent, a grating and an external LED light source are used for manufacturing a total internal reflection parallel light source in a waveguide, the grating needs higher processing technology, a total internal reflection parallel light signal is changed after a fingerprint contacts the waveguide, a receiver judges the fingerprint signal according to the total internal reflection parallel light signal, the identification capability of the scheme is uncertain, variation detection signals of homodromous total reflection parallel light elements are used, the principle has high requirement on surface cleanliness, any dirt is likely to cause judgment failure, and the grating external light source cannot realize full-plane fingerprint identification.
In other fingerprint identification devices at present, due to interference of ambient light and incident light, a sensor in an optical fingerprint identification device receives reflected light and is mixed with a lot of other light information, detection of fingerprint detection signals is affected, signal to noise ratio of a fingerprint identification detection structure is low, and detection accuracy is limited.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide an OLED screen for a fingerprint recognition device and a fingerprint recognition device with high detection accuracy and good appearance.
The application provides a fingerprint identification device uses OLED screen body in first aspect, includes:
a substrate and a light emitting part encapsulated on the substrate by an encapsulation cover plate;
the light emitting component comprises an organic functional layer, and a reflecting electrode and a base electrode which are respectively positioned at two sides of the organic functional layer;
a luminescent layer is arranged in the organic functional layer;
the reflecting electrode is positioned on one side of the light-emitting surface far away from the light-emitting layer;
the distance H between the reflecting electrode and the light-emitting layer satisfies the following set formula:
n1is the refractive index of the organic functional layer;
n2is the refractive index of the substrate;
k is an odd positive integer;
λ is the wavelength of light emitted by the light-emitting layer.
According to the technical scheme provided by the embodiment of the application, the packaging cover plate is positioned on one side of the reflection electrode, which is far away from the organic functional layer; an air layer is arranged between the reflection electrode and the packaging cover plate.
According to the technical scheme provided by the embodiment of the application, a small hole layer is arranged on one side of the packaging cover plate far away from the reflection electrode and is formed by arranging opaque materials at intervals.
According to the technical scheme provided by the embodiment of the application, the side surface of the substrate is provided with the reflecting film.
According to the technical scheme provided by the embodiment of the application, the packaging cover plate is positioned on one side of the basic electrode, which is far away from the organic functional layer;
an air layer is arranged between the basic electrode and the packaging cover plate.
According to the technical scheme provided by the embodiment of the application, the substrate is positioned on one side of the reflecting electrode, which is far away from the organic functional layer;
according to the technical scheme provided by the embodiment of the application, the reflecting electrode is transparent; the reflecting electrode and the substrate, and/or one side of the substrate far away from the reflecting electrode is provided with a small hole layer, and the small hole layer is formed by opaque materials in an interval arrangement mode.
According to the technical scheme provided by the embodiment of the application, the reflecting electrode is opaque, and small hole structures which are arranged at intervals are formed in the reflecting electrode.
According to the technical scheme provided by the embodiment of the application, the side edge of the packaging cover plate is pasted with the reflecting film.
According to the technical scheme provided by the embodiment of the application, the thickness range of the air layer is 1um-200um, and the preferable thickness is 20 um.
The second aspect of the present application still provides an adopt fingerprint identification device of above-mentioned arbitrary OLED screen body, the one side of keeping away from its plain noodles of OLED screen body is equipped with signal receiver.
The above technical solution of the present application, the design idea of the OLED device is reversely thought, the traditional design idea of the OLED device is overturned, by selecting the distance between the specific reflective electrode and the light emitting layer, although the light emitting and efficiency of the OLED device is reduced, most of the light under the fixed wavelength is limited by the substrate or the encapsulation cover plate in the form of total reflection or emitted in the form of side light, when the finger does not contact the light emitting surface, the whole device emits no or only a small amount of light, is relatively beautiful, when the human finger is attached to the substrate or the encapsulation cover plate on the side of the reflective electrode of the OLED device, the finger and its grain change the direction of light and reflect to the receiver, thereby enhancing the intensity of the received signal, further enhancing the accuracy, and improving the identification sensitivity of the fingerprint identification device, compared with the common OLED fingerprint identification device in the prior art, the light extraction efficiency is improved by 2-6 times, namely the recognition sensitivity is improved by 2-6 times, and meanwhile, in the using process of the technical scheme, the light rings can be formed around the fingers, so that a user can have visual sensing feeling, and the design scheme of the application is more aesthetic.
According to the technical scheme provided by the embodiment of the application, through the design of the reflecting film, the amount of lateral light is limited, and the sensitivity is further improved.
According to the technical scheme provided by the embodiment of the application, the air layer can prevent the interference effect of external stray light on the photosensitive device, and the signal-to-noise ratio of the device is further improved; the fingerprint identification signal can be enhanced through the design of the air layer, so that the accuracy is enhanced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of a bare screen according to a first embodiment of the present application;
FIG. 2 is a schematic structural diagram of a finger touch in the first embodiment of the present application;
FIG. 3 is a graph showing the comparison of light intensity at various angles between the first embodiment of the present application and the control group;
FIG. 4 is a schematic structural diagram of a second embodiment of the present application;
FIG. 5 is a schematic structural diagram of a fourth embodiment of the present application;
FIG. 6 is a schematic structural diagram of a fifth embodiment of the present application;
FIG. 7 is a schematic structural diagram of a sixth embodiment of the present application;
FIG. 8 is a schematic structural diagram of a seventh embodiment of the present application;
FIG. 9 is a schematic structural diagram of an eighth embodiment of the present application;
FIG. 10 is a schematic structural diagram of a ninth embodiment of the present application;
reference numbers in the figures:
10. a substrate; 20. a first electrode; 30. an organic functional layer; 40. a second electrode; 50. packaging the cover plate; 60. a receiver; 70. an air layer; 80. a small pore layer; 90. a reflective film; 100. a finger.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The application provides a fingerprint identification is OLED screen body for device includes: a substrate and a light emitting part encapsulated on the substrate by an encapsulation cover plate; the light emitting part includes: the organic functional layer, the reflecting electrode and the basic electrode are respectively positioned on two sides of the organic functional layer; a luminescent layer and a plurality of organic layers are arranged in the organic functional layer, and the luminescent layer is at least one layer; the reflecting electrode is positioned on one side of the light-emitting surface far away from the light-emitting layer; as can be understood by those skilled in the art, the fingerprint identification device using the OLED screen body is provided with a receiver on the outer side close to the reflecting electrode for receiving and identifying the signal reflected by the fingerprint.
The distance H between the reflective electrode and the light-emitting side is the thickness of one or more layers between the reflective electrode and the light-emitting layer:
for example, an organic layer I, a light-emitting layer I and an organic layer II are sequentially arranged between the base electrode and the reflective electrode, and the distance H between the reflective electrode and the light-emitting layer I is the thickness of the organic layer II;
for example, an organic layer I, a light-emitting layer I, an organic layer II, a light-emitting layer II, and an organic layer III are sequentially disposed between the base electrode and the reflective electrode, a distance H between the reflective electrode and the light-emitting layer I is a total thickness of the organic layer II, the light-emitting layer II, and the organic layer III, and a distance between the reflective electrode and the light-emitting layer II is a thickness of the organic layer III.
The distance H satisfies the following set formula:
n1is the refractive index of the organic functional layer;
n2is the refractive index of the substrate;
k is an odd positive integer;
λ is the wavelength of light emitted by the light-emitting layer.
The light emitted from the light emitting layer to the light emitting surface can increase optical signals due to the consistent coherence of the phase characteristics of the light reflected from the non-light emitting surface, the light with different wavelengths has a fixed distance d (which refers to the distance from the reflective electrode to the light emitting layer), and the specific formula is d ═ k λ/4n, wherein n is the refractive index of the material, k is an odd positive integer, and λ refers to the wavelength; the wavelength of the organic light-emitting material is the wavelength with a fixed highest peak, and then the wavelength is decreased towards two sides; the range of distance d where the coherence is strongest is set so that the coherence is strongest in a large angle direction, and the light of large angle is limited in the package cover plate or the substrate from dense light to sparse light larger than the critical angle.
When the distance H satisfies the above formula, the light emitted by the light-emitting layer and the light reflected by the reflective electrode form a non-constructive interference strong resonant cavity effect through the regulation and control of the optical characteristics, that is, the coherent phase of the light-emitting layer and the light reflected by the reflective electrode in the forward light-emitting direction is in a state of mismatching, so that the forward light-emitting direction is weak, and therefore, the ratio of the light intensity of the forward light perpendicular to the light-emitting surface of the OLED screen body to the intensity of the strongest light in an included angle of 45 degrees to 90 degrees relative to the normal direction is less than 1. The angle of the light rays perpendicular to the light-emitting surface is defined as 0 °, i.e. the normal direction.
The following examples illustrate details:
the first embodiment is as follows:
for example, as shown in fig. 1 and fig. 2, the OLED fingerprint recognition device sequentially includes, from bottom to top: a substrate 10, a first electrode 20, an organic functional layer 30, a second electrode 40, an encapsulation cover 50, and a receiver 60; in the figure, the arrow direction is a light emitting direction, the light emitting surface of the OLED fingerprint identification device in this embodiment is disposed on the bottom surface, and is a fingerprint identification device of a bottom light emitting type, so the second electrode 40 in this embodiment is a reflective electrode, and the first electrode 20 is a base electrode.
As shown in fig. 1, in a state of a bare screen, most light is sealed in the substrate 10, and only a small amount of light leaks from the side of the substrate 10; as shown in fig. 2, after the finger 100 is covered, the finger 100 changes the light emitting direction of the light, so that a large amount of light is reflected by the finger 100 to the receiver 60 to be recognized and sensed.
In the embodiment, the first electrode 20 is a transparent electrode ITO, and the organic functional layer 30 specifically covers the following layers from bottom to top in sequence:
a hole injection layer made of a host material HIL and having a thickness of 10 nm;
a hole transport layer, a host material HTL-1, with a thickness of 40 nm;
a fluorescent light-emitting layer, the main material MAND is 5% DSA-PH, and the thickness is 20 nm;
an electron transport layer, a host material ETL, with a thickness of 20 nm;
a charge generation layer made of HAT-CN as a main material and having a thickness of 20 nm;
a carrier regulation layer made of a main material TCTA with the thickness of 10 nm;
a phosphorescent light emitting layer of HOST material HOST-1: 15% Ir (ppy) 31% Ir (mdq2) (acac) with a thickness of 30 nm;
and the electron transport layer is made of a host material ETL and has the thickness of 140 nm.
HOST-1: 15% (Irppy) 31% Ir (mdq2) (acac) is a phosphorescent dye HOST material doped with 15% by volume of a green phosphorescent dye (Irppy) and 1% of a red phosphorescent dye [ Ir (mdq2) (acac) ].
MAND 5% DSA-PH is a blue fluorescent dye host material doped with 5% blue fluorescent dye.
The second electrode 20 is a metal cathode formed of 150nm thick Al (aluminum), i.e., a reflective electrode.
In this embodiment, the light emitting layer of the OLED fingerprint identification device comprises a phosphorescent light emitting layer and a fluorescent light emitting layer, the light emitted by the phosphorescent light emitting layer and the fluorescent light emitting layer is yellow light with a wavelength of about 580nm and blue light with a wavelength of 460nm, respectively, in this embodiment, the substrate is a glass substrate with a refractive index n2About 1.5, the refractive index n1 of the organic functional layer is about 1.8; according to the formula:
the distance from the phosphorescent light emitting layer to the reflective electrode can be calculated:
when k is a number of 1, the number of the transition metal,
44.53≤H≤65.09
when k is 3, the number of the transition metal atoms is 3,
133.29≤H≤195.27
......
distance from the fluorescent light emitting layer to the reflective electrode:
when k is a number of 1, the number of the transition metal,
35.32≤H≤51.62
when k is 3, the number of the transition metal atoms is 3,
105.96≤H≤154.86
when k is a value of 5, the composition,
176.60≤H≤258.10
......
the distance between the phosphorescent light-emitting layer and the reflecting electrode and the distance between the fluorescent light-emitting layer and the reflecting electrode can be any numerical value in the range on the premise of meeting the structural requirement of the OLED fingerprint identification device per se; it should be understood by those skilled in the art that since the distance between the reflective electrode and the fluorescent light-emitting layer is necessarily longer than the distance between the reflective electrode and the phosphorescent light-emitting layer, for example, when the distance between the reflective electrode and the phosphorescent light-emitting layer takes a value within a range of distances when k is 1, the distance between the fluorescent light-emitting layer and the reflective electrode must take a value within a range of values when k is 3 or more.
In the present embodiment, it can be seen that the organic layer between the phosphorescent light emitting layer and the second electrode 20 includes: and the electron transport layer is made of a host material ETL and has the thickness of 140 nm. The distance between the phosphorescent light emitting layer and the second electrode 20 is therefore: 140 nm. The organic layers between the fluorescent light emitting layer and the second electrode 20 include: the thickness of the electron transport layer is 140nm, the thickness of the phosphorescent light emitting layer is 30nm, the thickness of the carrier control layer is 10nm, the thickness of the charge generation layer is 20nm, the thickness of the electron transport layer is 20nm, and the thickness of the electron transport layer is 20nm, so that the distance between the fluorescent light emitting layer and the second electrode 20 is the total thickness of the electron transport layer, the phosphorescent light emitting layer, the carrier control layer, the charge generation layer and the electron transport layer, namely 220 nm.
To illustrate the performance difference between the OLED fingerprint recognition device in the above embodiment and the ordinary OLED fingerprint recognition device in the prior art, a first control group similar to a structure of the embodiment is provided as follows:
the OLED fingerprint identification device provided in the first comparison group sequentially comprises from bottom to top: a substrate 10, a first electrode 20, an organic functional layer 30, a second electrode 40, an encapsulation cover 50, and a receiver 60; the light emitting surface of the OLED fingerprint identification device in the first comparison group is also disposed on the bottom surface, and is a fingerprint identification device of a bottom light emitting type, so that the second electrode 40 in the first comparison group is a reflective electrode, and the first electrode 20 is a base electrode.
The first electrode 20 in the first control group is set as a transparent electrode ITO, and the organic functional layer 30 specifically covers the following layers from bottom to top in sequence:
hole injection layer: a host material HIL with the thickness of 10 nm;
hole transport layer: a host material HTL-1 with the thickness of 40 nm;
a fluorescent light-emitting layer: the host material MAND is 5 percent DSA-PH (the host material of the blue fluorescent dye doped with the blue fluorescent dye with the volume percentage of 5 percent) and has the thickness of 20 nm;
electron transport layer: a main body material ETL with the thickness of 20 nm;
a charge generation layer: the host material HAT-CN is 20nm thick;
carrier control layer: the main material TCTA is 10nm thick;
phosphorescent light emitting layer: HOST-1: 15% (Irppy) 31% Ir (mdq2) (acac): the thickness is 30 nm;
electron transport layer: a main body material ETL with the thickness of 20 nm;
the second electrode 20 is a metal cathode formed of 150nm thick Al, i.e., a reflective electrode.
The structure of the OLED fingerprint recognition device in the first comparison group is the same as that of the OLED fingerprint recognition device provided in the first embodiment, the light emitting layer also includes a phosphorescent light emitting layer and a fluorescent light emitting layer, the light emitted by the phosphorescent light emitting layer and the fluorescent light emitting layer is yellow light with a wavelength of about 580nm and blue light with a wavelength of 460nm, respectively, in the first comparison group, the substrate also adopts a glass substrate, and the refractive index n of the glass substrate is the same as that of the substrate2About 1.5, the refractive index n1 of the organic functional layer is about 1.8;
the organic layers between the phosphorescent light emitting layer and the second electrode 20 include:
an electron transport layer with a thickness of 20 nm;
the thickness of all organic layers between the phosphorescent light emitting layer and the second electrode 20 is therefore: 20nm, i.e. the distance between the second electrode 20 (reflective electrode) and the phosphorescent light-emitting layer is 20nm
The organic layers between the fluorescent light emitting layer and the second electrode 20 include:
an electron transport layer with a thickness of 20 nm; a phosphorescent light-emitting layer with a thickness of 30 nm; a carrier control layer with a thickness of 10 nm; a charge generation layer having a thickness of 20 nm; an electron transport layer with a thickness of 20 nm;
the thickness of all organic layers between the fluorescent light-emitting layer and the second electrode 20 is therefore: 100nm, namely the distance between the reflecting electrode and the fluorescent light-emitting layer is 100 nm. It can be seen that in the first control group, the distance between the reflective electrode and the light-emitting layer does not satisfy the range calculated by the formula in the first embodiment.
The experimental results of the above example one and the control group one are shown in the following table 1:
TABLE 1
The test results of the light intensity at each angle of the first example and the first control are shown in fig. 3, from which it can be seen that the ratio of the light intensity of the forward light perpendicular to the light emitting surface in the first example to the intensity of the strongest light at an angle of 45 ° to 90 ° to the normal direction is less than 1. In contrast, in the first control group, the light intensity of the forward light perpendicular to the light-emitting surface was the strongest.
As can be seen from the above comparative experimental results, the illumination performance of the first embodiment is much worse than that of the first control group, and in order to achieve the same brightness as that of the first control group, the first embodiment needs a higher voltage, so the bare screen efficiency is much lower than that of the first control group, only 9.62, but when the finger 100 is covered, the light extraction efficiency is much higher than that of the bare screen; therefore, the light extraction multiple (quotient of the light extraction efficiency when the finger 100 covers the naked screen) is also increased by a plurality of times compared with the first control group; therefore, the identification sensitivity of the device is greatly improved. Meanwhile, in the experiment, when the finger 100 covers, an aperture is formed around the finger 100 when the finger 100 touches, so that the sensing effect is achieved, and the design aesthetic feeling of the device is improved.
Example two:
for example, as shown in fig. 4, the OLED fingerprint identification device sequentially includes, from bottom to top: a receiver 60, a substrate 10, a first electrode 20, an organic functional layer 30, a second electrode 40, and an encapsulation cover 50; in the figure, the arrow direction is a light emitting direction, the light emitting surface of the OLED fingerprint identification device in this embodiment is disposed on the top surface, and is a top light emitting type fingerprint identification device, so the first electrode 20 in this embodiment is a reflective electrode, and the second electrode 40 is a base electrode.
In the present embodiment, the first electrode 20 is a metal cathode made of Al (aluminum) and having a thickness of 150 nm;
the organic functional layer sequentially comprises from bottom to top:
electron injection layer: a host material LiF (lithium fluoride) with the thickness of 0.8 nm;
electron transport layer: a main material Bphen (4, 7-diphenyl-1, 10-phenanthroline) with the thickness of 120 nm;
light-emitting layer: the host material Alq3 (8-hydroxyquinoline aluminum) is 40nm thick;
hole transport layer: a host material NPB with the thickness of 30 nm;
the second electrode is a transparent electrode ITO;
in this embodiment, the light emitted from the light-emitting layer is green light with a wavelength of about 520nm, and in this embodiment, the substrate is a glass substrate with a refractive index n2About 1.5, refractive index n of the organic functional layer1About 1.8; according to the formula:
it can be calculated that: when k is a number of 1, the number of the transition metal,
39.92≤H≤58.35
when k is 3, the number of the transition metal atoms is 3,
119.76≤H≤175.05
......
h may take any value within the above range, and all organic layers between the reflective electrode, i.e., the first electrode 20, and the light emitting layer include: the total thickness of the electron injection layer and the electron transport layer is 120.8nm, namely the distance H between the reflecting electrode and the light-emitting layer is 120.8 nm. In other embodiments, H may also take other values in other ranges when k is other positive odd integers.
Example three: on the basis of the second embodiment, the thickness of the electron transport layer was changed to 57.2 nm; the distance H from the reflective electrode to the light-emitting layer was therefore 58 nm.
Control group two: OLED fingerprint identification device includes from supreme down in proper order: a receiver 60, a substrate 10, a first electrode 20, an organic functional layer 30, a second electrode 40, and an encapsulation cover 50; the light emitting surface of the OLED fingerprint recognition device in this embodiment is disposed on the top surface, and is a top light emitting type fingerprint recognition device, so the first electrode 20 in the comparison group two is a reflective electrode, and the second electrode 40 is a base electrode.
In the second control group, the first electrode 20 was a metal cathode made of Al and having a thickness of 150 nm; the organic functional layer sequentially comprises from bottom to top:
electron injection layer: a host material LiF (lithium fluoride) with the thickness of 0.8 nm;
electron transport layer: a main material Bphen (4, 7-diphenyl-1, 10-phenanthroline) with the thickness of 30 nm;
light-emitting layer: the host material Alq3 (8-hydroxyquinoline aluminum) is 30nm thick;
hole transport layer: a host material NPB with the thickness of 30 nm;
the second electrode is a transparent electrode ITO;
all organic layers from the reflective electrode to the light emitting layer include: the total thickness of the electron injection layer and the electron transport layer is 30.8nm, namely the distance between the reflecting electrode and the luminescent layer is 30.8 nm;
the experimental results of the second example, the third example and the second control group are shown in the following table 2:
TABLE 2
It can also be seen from the comparative experiments described above that the light extraction times for example two and example three were also significantly increased relative to control group two.
Example four:
on the basis of the first embodiment, as shown in fig. 5, an air layer 70 with a thickness of 20um is disposed between the package cover 50 and the second electrode 40, and the air layer can prevent external stray light from interfering with the photosensitive device, so as to further improve the signal-to-noise ratio of the device; the fingerprint identification signal can be enhanced through the design of the air layer, so that the accuracy is improved.
Example five:
on the basis of the fourth embodiment, as shown in fig. 6, when the second electrode 40 is a transparent electrode, a small hole layer 80 is provided between the package cover 50 and the second electrode 40, and the transmission of the light beam to the sensor is realized by using the small hole imaging. In other embodiments, when the second electrode is a transparent electrode, the aperture layer may not be provided.
When the reflecting electrode is an opaque electrode, the reflecting electrode is provided with small hole structures which are arranged at intervals.
In this embodiment, the aperture layer is formed by an opaque material, which may be, for example, one of opaque metals, metal oxides, metal halides, resins, or other organic substances with a light shielding function.
In other embodiments, only the orifice layer 80 may be provided without the air layer 70.
In other embodiments, the aperture layer 80 may also be disposed on the outside of the hermetic cover 50.
Example six:
in addition to the second embodiment, as shown in fig. 7, an air layer 70 having a thickness of 20um is provided between the package cover 50 and the second electrode 40.
Example seven:
in addition to the sixth embodiment, as shown in fig. 8, when the first electrode 20 is a reflective electrode and is a transparent electrode, an aperture layer 80 with a thickness of 200um is disposed between the first electrode 20 and the substrate 10. When the first electrode 20 is a reflective electrode and is an opaque electrode, the reflective electrode is provided with small holes arranged at intervals.
In other embodiments, the thickness of the orifice layer 80 can be other values between 1um and 200 um.
Example eight:
as shown in fig. 9, based on the first embodiment, a reflective film 90 is attached to the side of the substrate, the reflective film 90 prevents the light from coming out from the side direction, a large amount of light is confined in the substrate in a total reflection state, and when the finger 100 covers the substrate, more light is reflected to the receiver, so that the light reflection amount during fingerprint identification is increased, and the sensitivity of fingerprint identification is improved.
The reflecting film can be a film formed by a metal material or a dielectric material, and only materials with refractive index larger than that of the glass substrate can be directly coated, or the reflecting film is coated on resin materials such as polyimide, polyethylene terephthalate, polyethylene naphthalate and the like to form the reflecting film and is attached on the glass substrate.
Example nine:
as shown in fig. 10, in the second embodiment, a reflective film 90 is attached to a side edge of the package cover 50. In this embodiment, more light is internally confined in the package cover plate by the reflective film 90, so as to increase the light reflection amount during fingerprint identification and improve the sensitivity of fingerprint identification.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. An OLED screen body for a fingerprint identification device, comprising:
a substrate and a light emitting part encapsulated on the substrate by an encapsulation cover plate;
the light emitting component comprises an organic functional layer, and a reflecting electrode and a base electrode which are respectively positioned at two sides of the organic functional layer;
a luminescent layer is arranged in the organic functional layer;
the reflecting electrode is positioned on one side of the light-emitting surface far away from the light-emitting layer;
the substrate is positioned on one side of the light-emitting surface of the light-emitting layer;
the distance H between the reflecting electrode and the light-emitting layer satisfies the following set formula:
n1is the refractive index of the organic functional layer;
n2is the refractive index of the substrate;
k is an odd positive integer;
λ is the wavelength of light emitted by the light-emitting layer;
the distance H between the reflecting electrode and the luminescent layer is the thickness of one or more layers of structures between the reflecting electrode and the luminescent layer.
2. The OLED screen body for fingerprint identification device of claim 1,
the packaging cover plate is positioned on one side of the reflection electrode, which is far away from the organic functional layer; an air layer is arranged between the reflection electrode and the packaging cover plate.
3. The OLED screen body for the fingerprint identification device according to claim 2, wherein the reflective electrode is transparent, and a small hole layer is arranged between the reflective electrode and the packaging cover plate and/or on one side of the packaging cover plate far away from the reflective electrode, and the small hole layer is formed by opaque materials in an interval arrangement mode.
4. The OLED screen body for the fingerprint identification device of claim 2, wherein the reflective electrode is opaque, and the reflective electrode is provided with small holes at intervals.
5. The OLED screen body for the fingerprint identification device according to any one of the claims 2 to 4, wherein the side surface of the substrate is provided with a reflective film.
6. The OLED screen body for the fingerprint identification device according to any one of the claims 2, 3 and 4, wherein the thickness of the air layer is in the range of 1um-200 um.
7. The OLED screen body for the fingerprint identification device according to any one of the claims 2, 3 and 4, wherein the thickness of the air layer is 20 um.
8. A fingerprint identification device adopting the OLED screen body as claimed in any one of claims 1-7, wherein a signal receiver is arranged on the side of the OLED screen body far away from the light-emitting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090096.8A CN109786577B (en) | 2019-01-30 | 2019-01-30 | OLED screen body for fingerprint identification device and fingerprint identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090096.8A CN109786577B (en) | 2019-01-30 | 2019-01-30 | OLED screen body for fingerprint identification device and fingerprint identification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109786577A CN109786577A (en) | 2019-05-21 |
| CN109786577B true CN109786577B (en) | 2020-12-11 |
Family
ID=66502869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910090096.8A Active CN109786577B (en) | 2019-01-30 | 2019-01-30 | OLED screen body for fingerprint identification device and fingerprint identification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109786577B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320847A (en) * | 2001-05-18 | 2001-11-07 | 清华大学 | Fingerprint image sensor based on waveguide holographic technique and method for acquiring finigerprint image |
| CN105759330A (en) * | 2016-03-16 | 2016-07-13 | 上海交通大学 | Fingerprint identification system based on raster structure and microprism array |
| WO2017127994A1 (en) * | 2016-01-25 | 2017-08-03 | Schott Glass Technologies (Suzhou) Co. Ltd. | System for optical detection of parameters |
| CN107527039A (en) * | 2017-08-31 | 2017-12-29 | 京东方科技集团股份有限公司 | A kind of optical fingerprint identification device and display device |
| CN107563354A (en) * | 2017-09-27 | 2018-01-09 | 京东方科技集团股份有限公司 | A kind of fingerprint identification unit, fingerprint identification device and its fingerprint identification method, display device |
| KR20180121329A (en) * | 2017-04-28 | 2018-11-07 | 엘지디스플레이 주식회사 | Optical sensor, display device and mobile terminal using the optical sensor |
| CN109145682A (en) * | 2017-06-16 | 2019-01-04 | 固安翌光科技有限公司 | A kind of optical fingerprint identification device and preparation method thereof |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7728959B2 (en) * | 2003-06-21 | 2010-06-01 | Aprilis, Inc. | Acquisition of high resolution biometric images |
| CN102339382B (en) * | 2004-06-01 | 2015-09-16 | 光谱辨识公司 | Multispectral imaging bio-identification |
| US20160092718A1 (en) * | 2014-07-16 | 2016-03-31 | Eric Dean Jensen | Fingerprint sensor |
| JP2016115862A (en) * | 2014-12-17 | 2016-06-23 | セイコーエプソン株式会社 | Image acquisition device, biological information acquisition device, electronic apparatus |
| CN104751121B (en) * | 2015-03-05 | 2019-04-05 | 上海交通大学 | Light wave conduction fingerprint recognition system based on optical grating construction |
| CN107004130B (en) * | 2015-06-18 | 2020-08-28 | 深圳市汇顶科技股份有限公司 | Optical sensor module under screen for sensing fingerprint on screen |
| CN106991366A (en) * | 2016-01-21 | 2017-07-28 | 上海箩箕技术有限公司 | Optical fingerprint sensor |
| KR20180001055A (en) * | 2016-06-24 | 2018-01-04 | 삼성전자주식회사 | Electronic device including the fingerprint sensor and operating method thereof |
| US10741621B2 (en) * | 2016-11-25 | 2020-08-11 | Lg Display Co., Ltd. | Display device with a fingerprint sensor |
| CN106940598B (en) * | 2016-12-20 | 2019-12-03 | 上海交通大学 | Collect the optical touch screen of touch-control and fingerprint recognition |
| CN107045628B (en) * | 2017-04-17 | 2019-06-04 | 京东方科技集团股份有限公司 | A kind of touch panel, display panel, display device and fingerprint identification method |
| CN106981503B (en) * | 2017-04-27 | 2019-11-15 | 上海天马微电子有限公司 | A kind of display panel and electronic equipment |
| CN107122742B (en) * | 2017-04-27 | 2019-12-03 | 上海天马微电子有限公司 | A kind of display device and its fingerprint identification method and electronic equipment |
| KR102357521B1 (en) * | 2017-06-02 | 2022-02-03 | 삼성디스플레이 주식회사 | Display device |
| CN107133613B (en) * | 2017-06-06 | 2020-06-30 | 上海天马微电子有限公司 | Display panel and display device |
| CN107275376B (en) * | 2017-06-27 | 2019-12-20 | 上海天马微电子有限公司 | Display panel and display device |
| CN107480584B (en) * | 2017-07-05 | 2021-11-26 | 上海交通大学 | Scanning type fingerprint identification and touch control integrated screen |
| CN107515435B (en) * | 2017-09-11 | 2020-12-29 | 京东方科技集团股份有限公司 | Display panel and display device |
-
2019
- 2019-01-30 CN CN201910090096.8A patent/CN109786577B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320847A (en) * | 2001-05-18 | 2001-11-07 | 清华大学 | Fingerprint image sensor based on waveguide holographic technique and method for acquiring finigerprint image |
| WO2017127994A1 (en) * | 2016-01-25 | 2017-08-03 | Schott Glass Technologies (Suzhou) Co. Ltd. | System for optical detection of parameters |
| CN105759330A (en) * | 2016-03-16 | 2016-07-13 | 上海交通大学 | Fingerprint identification system based on raster structure and microprism array |
| KR20180121329A (en) * | 2017-04-28 | 2018-11-07 | 엘지디스플레이 주식회사 | Optical sensor, display device and mobile terminal using the optical sensor |
| CN109145682A (en) * | 2017-06-16 | 2019-01-04 | 固安翌光科技有限公司 | A kind of optical fingerprint identification device and preparation method thereof |
| CN107527039A (en) * | 2017-08-31 | 2017-12-29 | 京东方科技集团股份有限公司 | A kind of optical fingerprint identification device and display device |
| CN107563354A (en) * | 2017-09-27 | 2018-01-09 | 京东方科技集团股份有限公司 | A kind of fingerprint identification unit, fingerprint identification device and its fingerprint identification method, display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109786577A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11716892B2 (en) | Visible light sensor embedded organic light emitting diode display panels and display devices including the same | |
| US10763315B2 (en) | Display apparatus including light receiving pixel area | |
| TWI617023B (en) | Display device and optical film | |
| US11049901B2 (en) | Display apparatus including light-receiving device | |
| US11121196B2 (en) | Display device | |
| KR101970022B1 (en) | Method and apparatus for providing a window with an at least partially transparent one side emitting oled lighting and an ir sensitive photovoltaic panel | |
| CN206672121U (en) | Optical sensing module and fingerprint sensing device | |
| WO2004044998A2 (en) | Organic light emitting diode (oled) with contrast enhancement features | |
| US10468465B1 (en) | Display panel and fabrication method, and display device thereof | |
| WO2018029442A1 (en) | Touch screen display | |
| CN109786577B (en) | OLED screen body for fingerprint identification device and fingerprint identification device | |
| JP2843924B2 (en) | Surface emitting device | |
| US20180373916A1 (en) | Fingerprint identification device with supplementary light source and mobile device using the same | |
| CN213519967U (en) | Display device and electronic apparatus | |
| WO2018205121A1 (en) | Display module | |
| CN213519965U (en) | Display device, detection module, image module and electronic equipment | |
| WO2018205124A1 (en) | Display module | |
| CN213519977U (en) | Display device, detection module, image module and electronic equipment | |
| CN213519963U (en) | Display device, detection module, image module and electronic equipment | |
| CN213519974U (en) | Display device, detection module and electronic equipment | |
| CN213519961U (en) | Display device and electronic apparatus | |
| CN213519959U (en) | Display device, detection module, image module and electronic equipment | |
| CN213519972U (en) | Display device and electronic apparatus | |
| CN213519962U (en) | Display device, detection module, image module and electronic equipment | |
| JP2003303679A (en) | Organic luminous element package |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |