CN109993141B - OLED display panel, fingerprint identification method and display device - Google Patents
OLED display panel, fingerprint identification method and display device Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
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- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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Abstract
An OLED display panel, a fingerprint identification method and a display device are provided, wherein the OLED display panel comprises: the OLED light-emitting device comprises a substrate, and a light-shielding layer, an OLED light-emitting device and a sensor assembly which are arranged on the substrate; the shading layer is positioned between the OLED light-emitting device and the sensor assembly; the light-shielding layer includes: the small hole imaging area is used for imaging the local fingerprint to be detected to the sensor component when the small hole imaging area is used for detecting the fingerprint to be detected. The aperture image area that is arranged in this application on the light shield layer will be partly awaited measuring the fingerprint image to the sensor module in, has reduced aperture distribution area among the OLED display panel for normally show the number of pixel increases among the OLED display panel, and then has improved OLED display panel's formation of image effect.
Description
Technical Field
The patent refers to the field of 'electric digital data processing'.
Background
Fingerprints are the unchanging features which are unique and distinguishable from the human body, and are composed of ridges and valleys on the surface of the skin at the tips of the fingers, the composition details of which determine the uniqueness of the fingerprint pattern. The display panel with fingerprint identification function developed by the method has been used for personal identity authentication, and the information security of the display device is improved.
In the related art, an Organic Light-Emitting Diode (OLED) display panel with a fingerprint recognition function uses an image sensor and small holes designed in the OLED display panel to realize fingerprint recognition through a small hole imaging principle. The research of the inventor finds that the distribution area of the small holes on the OLED display panel in the related technology is large, so that the number of pixels which cannot be normally displayed in the OLED display panel is large, and the imaging effect of the OLED display panel is poor.
Disclosure of Invention
The application provides an OLED display panel, a fingerprint identification method and a display device, which reduce the distribution area of small holes in the OLED display panel, increase the number of normal display pixel points in the OLED display panel and further improve the imaging effect of the OLED display panel.
In a first aspect, the present application provides an OLED display panel comprising: the OLED light-emitting device comprises a substrate base plate, and a light shielding layer, an OLED light-emitting device and a sensor assembly which are arranged on the substrate base plate; the light shielding layer is positioned between the OLED light-emitting device and the sensor assembly;
the light-shielding layer includes: the small hole imaging area is used for imaging the local fingerprint to be detected onto the sensor component when the fingerprint to be detected is detected.
Optionally, the light shielding layer is located on a side of the substrate close to the OLED light emitting device, and the sensor assembly is located on a side of the substrate far from the light shielding layer.
Optionally, the orthographic projection of the light shielding layer on the substrate covers the orthographic projection of the OLED light emitting device on the substrate.
Optionally, the orthographic projection of the sensor assembly on the substrate base plate covers the orthographic projection of the pinhole imaging area on the substrate base plate.
Optionally, the length of the small hole imaging area is greater than the width of the fingerprint to be detected, and the width of the small hole imaging area is smaller than the length of the fingerprint to be detected.
Optionally, the aperture imaging region comprises a plurality of openings arranged in an array; the centers of the openings in the same row or column are located on the same line.
Optionally, when the shape of the open pore is circular, the diameter of each open pore is 3-25 micrometers.
Optionally, the distance between adjacent apertures is equal.
Optionally, the sensor assembly comprises: the image sensor is used for acquiring a plurality of local fingerprint images of a fingerprint to be detected above the OLED display panel and passing through the small hole imaging area;
the OLED display panel further includes: a processor;
the processor is connected with the image sensor and used for splicing and combining the received partial fingerprint images to form a complete fingerprint image.
Optionally, the sensor assembly further comprises: a pressure sensor;
the pressure sensor is used for acquiring a pressure value applied to the OLED display panel by the fingerprint to be detected;
the processor is connected with the pressure sensor and used for splicing and combining the received partial fingerprint images to form a complete fingerprint image when the pressure value is larger than 0.
Optionally, the OLED display panel further includes: a buffer layer;
the buffer layer is arranged on one side, close to the OLED light-emitting device, of the light shielding layer.
In a second aspect, the present application also provides a display device including the OLED display panel.
In a second aspect, the present application further provides a fingerprint identification method applied to the above OLED display panel, where the method includes:
when detecting a fingerprint to be detected, acquiring a local fingerprint image of the fingerprint to be detected passing through a small hole imaging area.
Optionally, when detecting a fingerprint to be detected, after acquiring a local fingerprint image of the fingerprint to be detected passing through the pinhole imaging area, the method further includes:
and splicing and combining the received multiple local fingerprint images to form a complete fingerprint image.
Optionally, the splicing and combining the received multiple partial fingerprint images to form a complete fingerprint image includes:
acquiring a pressure value applied to the OLED display panel by the fingerprint to be detected;
and under the condition that the pressure value is greater than 0, splicing and combining the received partial fingerprint images to form a complete fingerprint image.
The application provides an OLED display panel, a fingerprint identification method and a display device, wherein the OLED display panel comprises: the OLED light-emitting device comprises a substrate, and a light-shielding layer, an OLED light-emitting device and a sensor assembly which are arranged on the substrate; the shading layer is positioned between the OLED light-emitting device and the sensor assembly; the light-shielding layer includes: the small hole imaging area is used for imaging the local fingerprint to be detected onto the sensor component when the fingerprint to be detected is detected. The aperture image area that is arranged in this application on the light shield layer will be partly awaited measuring the fingerprint image to the sensor module in, has reduced aperture distribution area among the OLED display panel for normally show the number of pixel increases among the OLED display panel, and then has improved OLED display panel's formation of image effect.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification, claims, and drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a side view of an OLED display panel in the related art;
FIG. 2 is a schematic view showing the distribution of pores in the related art;
fig. 3 is a first side view of an OLED display panel provided in an embodiment of the present application;
fig. 4 is a top view of a light-shielding layer according to an embodiment of the present disclosure;
fig. 5 is a light path diagram of an OLED display panel provided in an embodiment of the present application;
fig. 6 is a second side view of the OLED display panel according to the embodiment of the present application.
Detailed Description
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
Unless defined otherwise, technical or scientific terms used in the disclosure of the embodiments of the present invention should have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar language in the embodiments of the present invention does not denote any order, quantity, or importance, but rather the terms "first," "second," and similar language are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Fig. 1 is a side view of an OLED display panel in the related art, and fig. 2 is a schematic view illustrating distribution of small holes in the related art, as shown in fig. 1 and 2, the OLED display panel in the related art includes: the OLED light emitting device 1, the via hole 2 and the sensor 3.
Specifically, the pinhole imaging principle is as follows: light is transmitted along a straight line in the same uniform medium under the condition of not being interfered by the action of attractive force, when the fingerprint is detected, light rays emitted by the OLED light-emitting device 1 are reflected at different positions of the finger, the reflected light rays reach different positions of the sensor 3 through the through hole 2 on the OLED display panel, the sensor 3 obtains a fingerprint image according to the received light rays, and after the collected fingerprint image is compared and identified with an original fingerprint, whether the fingerprint is matched or not is judged, and unlocking is achieved. It should be noted that, when the OLED display panel in the related art detects a fingerprint, the pixel point of the OLED display panel corresponding to the via hole 2 is in a normally bright state.
As shown in fig. 2, the distribution area of the via holes 2 in the related art covers the area of the fingerprint, and the area of the distribution area of the via holes 2 is large, so that the number of pixels that cannot be normally displayed is large when the fingerprint is detected, and the imaging effect of the OLED display panel is poor. In addition, although the distribution area of the via holes 2 in the related art is large in area, the width is narrow, so that the OLED display panel usually needs to give a position prompt before detecting a fingerprint, which is not beneficial to realizing touch control.
In order to solve the foregoing technical problem, an embodiment of the present application provides an OLED display panel, a fingerprint detection method, and a display device, and the details are as follows:
example one
An embodiment of the present application provides an OLED display panel, fig. 3 is a first side view of the OLED display panel provided in the embodiment of the present application, and fig. 4 is a top view of a light shielding layer provided in the embodiment of the present application, as shown in fig. 3 and fig. 4, the OLED display panel provided in the embodiment of the present application includes: a substrate 10, and a light shielding layer 20, an OLED light emitting device 30 and a sensor assembly 40 disposed on the substrate 10; the light shielding layer 20 is positioned between the OLED light emitting device 30 and the sensor assembly 40.
Specifically, the light-shielding layer 20 includes: the small hole imaging area 21, the small hole imaging area 21 is used for imaging the local fingerprint to be measured on the sensor component 40 when detecting the fingerprint to be measured.
Wherein the OLED light emitting device 30 comprises a detection area, an orthographic projection of which on the substrate base plate coincides with an orthographic projection of the pinhole imaging area on the substrate base plate. Specifically, in this embodiment, when detecting a fingerprint to be detected, the fingerprint to be detected is placed on the detection area.
Alternatively, the substrate base plate 10 may be a rigid substrate or a flexible substrate, wherein the rigid substrate may be, but is not limited to, one or more of glass, metal foil; the flexible substrate may be, but is not limited to, one or more of polyethylene terephthalate, ethylene terephthalate, polyetheretherketone, polystyrene, polycarbonate, polyarylate, polyimide, polyvinyl chloride, polyethylene, textile fibers.
Alternatively, the light shielding layer 20 may be made of a metal or non-metal light shielding material. The metal or black matrix material is not limited in this embodiment, and the thickness of the light shielding layer is not particularly limited in this embodiment as long as the effect of shielding light is achieved.
Preferably, in order to avoid a large thickness of the OLED display panel, in the embodiment of the present application, the thickness of the light shielding layer 20 is small, at this time, when the OLED display panel is manufactured, an additional preparation process is not required to be set to fill the small hole imaging region, the film layer on the side of the light shielding layer 20 away from the substrate 10 may be used to fill the small hole imaging region, and other performances of the OLED display panel may not be affected, of course, other preparation processes may also be additionally set to fill the small hole imaging region, which is selected according to specific situations and is not specifically limited herein.
Specifically, the OLED light emitting device 30 specifically includes: the fingerprint detection device comprises a thin film transistor, an anode, a light emitting layer and a cathode, wherein the anode is connected with a drain electrode of the thin film transistor, and when a fingerprint is detected, light emitted by the light emitting layer is reflected by the fingerprint to be detected.
Optionally, the OLED light emitting device 30 has a touch function, and may be a self-contained type or a mutual-contained type, which is not limited in any way in this embodiment of the present application and is determined specifically according to actual requirements.
Specifically, in order to ensure that the fingerprint can be detected normally, the orthographic projection of the pinhole imaging area 21 on the substrate base plate 10 is located on the display area AA of the substrate base plate 10.
In the embodiment of the present application, the width of the small hole imaging area 21 is H, and the small hole imaging area 21 is used for imaging the local fingerprint to be detected, whose width is equal to the width of the small hole imaging area 21, onto the sensor component 40 when detecting the fingerprint to be detected.
As shown in fig. 3, when the fingerprint to be detected is on the detection area of the OLED display panel, the fingerprint to be detected is divided into a plurality of M local fingerprints to be detected having a width of H, the M local fingerprints to be detected are parallel to each other, the sensor assembly 40 detects one local fingerprint to be detected each time, and the complete fingerprint image is obtained by continuously detecting the plurality of local fingerprints to be detected, that is, the fingerprint to be detected is scanned and detected when the OLED display panel moves. Specifically, the complete fingerprint image is formed by overlapping the partial fingerprints to be measured according to parallel equidistance, and the complete fingerprint image G comprises the following components: g is G1+ G2+ G3+ G4+ … + GM, wherein Gi represents the ith local fingerprint to be detected with the width H, and i is more than or equal to 1 and less than or equal to M.
Fig. 5 is the light path diagram of the OLED display panel that this application embodiment provided, as shown in fig. 5, when detecting the fingerprint that awaits measuring, the light that the OLED display panel luminescent layer sent is to the fingerprint that awaits measuring on, this light gets into the OLED display panel after the fingerprint reflection that awaits measuring to the light on the fingerprint that awaits measuring, and this light shines on the sensor subassembly through the aperture formation of image.
The OLED display panel that this application embodiment provided includes: the OLED light-emitting device comprises a substrate base plate, and a light shielding layer, an OLED light-emitting device and a sensor assembly which are arranged on the substrate base plate; the shading layer is positioned between the OLED light-emitting device and the sensor assembly; the light-shielding layer includes: the small hole imaging area is used for imaging the local fingerprint to be detected onto the sensor component when the fingerprint to be detected is detected. The aperture image area that is arranged in this application on the light shield layer will be partly awaited measuring the fingerprint image to the sensor module in, has reduced aperture distribution area among the OLED display panel for normally show the number of pixel increases among the OLED display panel, and then has improved OLED display panel's formation of image effect.
In the embodiment, as shown in fig. 3, the light shielding layer 20 is located on one side of the substrate 10 close to the OLED light emitting device 30, and the sensor assembly 40 is located on one side of the substrate 10 away from the light shielding layer 20.
In order to ensure the display effect of the OLED display panel, the orthographic projection of the light shielding layer 20 on the substrate 10 covers the orthographic projection of the OLED light emitting device 30 on the substrate 10.
In this embodiment, the orthographic projection of the sensor assembly 40 on the substrate base plate 10 covers the orthographic projection of the pinhole imaging area 21 on the substrate base plate 10.
In this application, the orthographic projection of the sensor component 40 on the substrate base plate 10 covers the orthographic projection of the small-hole imaging area 21 on the substrate base plate 10, so that the lengths of light paths reflected from different positions of a fingerprint to be detected are basically consistent, the light paths cannot be overlapped when reaching the sensor component 40, and the fingerprint resolution ratio is improved.
Specifically, as shown in fig. 4, the length L of the pinhole imaging area 21 is greater than the width of the fingerprint to be measured, and the width H of the pinhole imaging area 21 is less than the length of the fingerprint to be measured.
Optionally, the length of the small-hole imaging area 21 is 3 to 20 centimeters, in order not to affect the display effect of the OLED display panel, the width of the small-hole imaging area 21 is less than 25 micrometers, the width of the small-hole imaging area 21 occupies multiple rows of pixels, the number of the specifically occupied rows of pixels is determined according to an actual situation, and this is not limited in this embodiment of the present application.
In this application, the shape of the small-hole imaging area 21 is seen as a strip shape, so that the arrangement is compared with the related art, the width of the small-hole imaging area 21 is increased, when the fingerprint is detected, the upward sliding scanning through the finger can be realized, the prompt of the fingerprint detection position is not required to be given, the touch control is facilitated, and the good use feeling is brought to the user.
Specifically, as shown in FIG. 4, the aperture imaging area 21 includes a plurality of openings 22 arranged in an array.
Specifically, the number of rows and columns of the plurality of openings 22 is determined according to practical situations, and the embodiment of the present application is not limited in any way. Further, to ensure the integrity of the image formed through the pinhole imaging area 21, the centers of the openings 22 in the same row or column are located on the same line.
Alternatively, the shape of the opening 22 is circular or square, which is more convenient and simple in actual design. Of course, in the actual design, the shape of the opening may be set to other shapes, such as a diamond shape, and the specific shape of the opening is not limited in the embodiments of the present application. In specific implementation, the opening can be formed by a patterning process, and the patterning process comprises: the processes of coating, exposing, developing, etching, and stripping the photoresist are not limited in this embodiment.
In practical applications, when the openings in the embodiment of the present application are circular, in order to improve the resolution accuracy of fingerprint recognition, the diameter of the openings needs to be as small as possible, but it should not be too small, and if the diameter of the openings is too small, the illumination of the surface of the sensor assembly 40 is too low, which makes the extraction of the imaged data difficult, and preferably, when the openings are circular, the diameter of each opening is 3 to 25 micrometers, which is better.
Optionally, the openings are uniformly distributed on the light shielding layer, distances between adjacent openings may be equal or unequal, preferably, distances between adjacent openings are equal, and a distance between two adjacent openings is 300-1250 micrometers.
Optionally, the sensor assembly 40 comprises: and the image sensor is used for acquiring a plurality of partial fingerprint images of the fingerprint to be detected above the OLED display panel and passing through the small hole imaging area 21.
Specifically, the OLED display panel further includes: a processor; the processor is connected with the image sensor and used for splicing and combining the received partial fingerprint images to form a complete fingerprint image. The processor is further configured to determine whether the full fingerprint image matches a pre-stored original fingerprint image.
Alternatively, the image sensor is a Charge-coupled Device (CCD) photosensitive image sensor or a Complementary Metal Oxide Semiconductor (CMOS) photosensitive image sensor.
Optionally, the processor may be a single chip microcomputer, a microprocessor, an embedded processor, that is, a central processing unit, or a processor specifically used for fingerprint identification, which is not limited in this embodiment of the present application.
Further, the sensor assembly 40 in the embodiment of the present application further includes: a pressure sensor; and the pressure sensor is used for acquiring the pressure value applied to the OLED display panel by the fingerprint to be detected.
Specifically, the processor is connected with the pressure sensor and used for splicing and combining the received multiple local fingerprint images to form a complete fingerprint image in a state that the pressure value is greater than 0.
Optionally, fig. 6 is a second side view of the OLED display panel provided in the embodiment of the present application, and as shown in fig. 6, the OLED display panel provided in the embodiment of the present application further includes: and a buffer layer 50, wherein the buffer layer 50 is disposed on a side of the light shielding layer 20 adjacent to the OLED light emitting device 30.
Optionally, the buffer layer 50 is made of a transparent material, and may be silicon oxide, silicon nitride, or a composite of silicon oxide and silicon nitride, which is not limited in this embodiment of the present application.
Specifically, the buffer layer in the embodiment of the application can diffuse substances in the OLED light emitting device into the shading layer in the subsequent process, so that the yield of the OLED display panel can be improved.
The technical solution of the embodiment of the present application is further described below by the working principle process of fingerprint identification.
Specifically, the method comprises the following steps: the finger moves on the OLED display panel, the OLED display panel emits light by self-luminescence, one part of light is directly used for displaying, the other part of light irradiates the finger, the ridge (the convex part) of the finger fingerprint is directly contacted with the OLED display panel, the valley (the concave part) of the finger fingerprint is not directly contacted with the OLED display panel, therefore, the light reflected by different positions of the finger is different, the reflected light carrying the information of the ridge and the valley of the finger fingerprint reaches the image sensor through the small hole imaging area, wherein, the image sensor judges the ridge and the valley according to the intensity of the light energy of the receiving area, a clear local fingerprint image is generated after image processing, the local fingerprint width detected by the image sensor each time is H, a plurality of fingerprints with the width of H are spliced to form a complete fingerprint image after the complete movement is finished, and the complete fingerprint image is compared with the original fingerprint image, thereby judging whether the fingerprints are matched.
Example two
Based on the inventive concept of the foregoing embodiment, an embodiment of the present application further provides a fingerprint identification method, which is applied to the OLED display panel provided in the first embodiment, and the fingerprint identification method provided in the embodiment of the present application includes:
when detecting the fingerprint to be detected, acquiring a local fingerprint image of the fingerprint to be detected passing through the small hole imaging area.
The fingerprint identification method provided by the application is applied to the OLED display panel provided by the first embodiment, the implementation principle and the implementation effect are similar, and details are not repeated here.
Optionally, when detecting a fingerprint to be detected, after acquiring a local fingerprint image of the fingerprint to be detected passing through the small hole imaging region, the fingerprint identification method provided in the embodiment of the present application further includes: and splicing and combining the received multiple local fingerprint images to form a complete fingerprint image.
Optionally, the stitching and combining the received multiple partial fingerprint images to form a complete fingerprint image includes: acquiring a pressure value applied to the OLED display panel by the fingerprint to be detected; and under the condition that the pressure value is greater than 0, splicing and combining the received partial fingerprint images to form a complete fingerprint image.
EXAMPLE III
Based on the inventive concept of the above embodiments, an embodiment of the present application further provides a display device, including: an OLED display panel.
The OLED display panel in the embodiment of the present application is the OLED display panel provided in the first embodiment, and the implementation principle and the implementation effect thereof are similar, and are not described herein again.
The display device is a touch display device, and the OLED display panel has a touch function.
Optionally, the OLED display panel with the touch function may be a self-contained OLED display panel or a mutual-contained OLED display panel. The specific setting mode of the touch electrode of the self-contained OLED display panel is the same as that of the related art, and if the common electrode is used as the touch electrode, the detailed description is omitted here; the specific arrangement of the touch electrodes of the mutual capacitance OLED display panel is the same as that of the related art, for example, the driving electrodes and the sensing electrodes are arranged to be cross-insulated with each other, and details are not repeated here.
Specifically, the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the present application.
The drawings of the embodiments of the invention only relate to the structures related to the embodiments of the invention, and other structures can refer to common designs.
In the drawings used to describe embodiments of the invention, the thickness and dimensions of layers or microstructures are exaggerated for clarity. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. An OLED display panel, comprising: the OLED light-emitting device comprises a substrate base plate, and a light shielding layer, an OLED light-emitting device and a sensor assembly which are arranged on the substrate base plate; the light shielding layer is positioned between the OLED light-emitting device and the sensor assembly;
the light-shielding layer includes: the small-hole imaging area is used for sequentially imaging M local fingerprints to be detected with the width of H continuously passing through the small-hole imaging area onto the sensor assembly when the detected fingerprints to be detected move on the OLED display panel; the M local fingerprints to be detected are mutually parallel and jointly form the fingerprint to be detected, and H is the width of the small hole imaging area; the pinhole imaging area images a local fingerprint image at a time;
the sensor assembly includes: the image sensor is used for sequentially acquiring the M local fingerprint images of the fingerprint to be detected above the OLED display panel, wherein the fingerprint to be detected continuously passes through the small hole imaging area; the image sensor detects one partial fingerprint image at a time;
the OLED display panel further includes: a processor;
the processor is connected with the image sensor and is used for splicing and combining the received M partial fingerprint images to form a complete fingerprint image;
wherein the pinhole imaging area comprises a plurality of openings arranged in an array; the centers of the openings in the same row or column are located on the same line.
2. The OLED display panel of claim 1, wherein the light shield layer is located on a side of the substrate proximate to the OLED light emitting devices, and the sensor assembly is located on a side of the substrate distal from the light shield layer.
3. The OLED display panel of claim 1, wherein an orthographic projection of the light shielding layer on the substrate covers an orthographic projection of the OLED light emitting device on the substrate.
4. The OLED display panel of claim 1, wherein an orthographic projection of the sensor assembly on the substrate base plate covers an orthographic projection of the aperture imaging area on the substrate base plate.
5. The OLED display panel according to any one of claims 1 to 4, wherein the length of the small hole imaging area is greater than the width of the fingerprint to be detected, and the width of the small hole imaging area is smaller than the length of the fingerprint to be detected.
6. The OLED display panel of claim 1, wherein when the shape of the opening is circular, the diameter of the opening is 3-25 μm.
7. The OLED display panel of claim 1, wherein the distance between adjacent apertures is equal.
8. The OLED display panel of claim 7, wherein the sensor assembly further comprises: a pressure sensor;
the pressure sensor is used for acquiring a pressure value applied to the OLED display panel by the fingerprint to be detected;
and the processor is connected with the pressure sensor and is used for splicing and combining the received M partial fingerprint images to form a complete fingerprint image when the pressure value is greater than 0.
9. The OLED display panel of claim 2, further comprising: a buffer layer;
the buffer layer is arranged on one side, close to the OLED light-emitting device, of the light shielding layer.
10. A display device comprising the OLED display panel according to any one of claims 1 to 9.
11. A fingerprint identification method applied to the OLED display panel as claimed in any one of claims 1 to 9, the method comprising:
when detecting that a fingerprint to be detected moves on an OLED display panel, sequentially acquiring M local fingerprint images of the fingerprint to be detected continuously passing through a small hole imaging area; the M local fingerprints to be detected are mutually parallel and jointly form the fingerprint to be detected, and H is the width of the small hole imaging area; detecting one partial fingerprint image at a time;
and splicing and combining the received M local fingerprint images to form a complete fingerprint image.
12. The method according to claim 11, wherein the stitching and combining the M received partial fingerprint images to form a complete fingerprint image comprises:
acquiring a pressure value applied to the OLED display panel by the fingerprint to be detected;
and splicing and combining the received M partial fingerprint images to form a complete fingerprint image in the state that the pressure value is greater than 0.
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| CN201910283570.9A CN109993141B (en) | 2019-04-10 | 2019-04-10 | OLED display panel, fingerprint identification method and display device |
| PCT/CN2020/080134 WO2020207221A1 (en) | 2019-04-10 | 2020-03-19 | Display panel, fingerprint recognition method and display device |
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| CN109993141B (en) * | 2019-04-10 | 2021-09-03 | 京东方科技集团股份有限公司 | OLED display panel, fingerprint identification method and display device |
| CN110866456B (en) * | 2019-10-28 | 2023-12-12 | 武汉华星光电技术有限公司 | Under-screen fingerprint identification device, display panel and display device |
| CN112070002A (en) * | 2020-09-07 | 2020-12-11 | 京东方科技集团股份有限公司 | Fingerprint identification method, fingerprint identification structure and display device |
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| CN109993141A (en) | 2019-07-09 |
| WO2020207221A1 (en) | 2020-10-15 |
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