CN113066833A - Display substrate and display device - Google Patents
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- CN113066833A CN113066833A CN202110286130.6A CN202110286130A CN113066833A CN 113066833 A CN113066833 A CN 113066833A CN 202110286130 A CN202110286130 A CN 202110286130A CN 113066833 A CN113066833 A CN 113066833A
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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Abstract
The application provides a display substrate and display device, this display substrate includes: the device comprises a substrate, a switching device layer, a functional device layer and a color film layer; the functional device layer comprises a plurality of light emitting devices and at least one fingerprint identification device; the switching device layer comprises a first driving device for driving the light emitting device and a second driving device for driving the fingerprint identification device; the first driving device is positioned in the display area, and the second driving device is positioned in the fingerprint identification area; the color film layer comprises a preset number of fingerprint holes, and the orthographic projections of the fingerprint holes on the substrate are positioned in the orthographic projections of the fingerprint identification device on the substrate. The display substrate provided by the embodiment of the application is provided with the fingerprint hole corresponding to the fingerprint identification device under the screen in the color film layer, so that light of the light-emitting device reflected by the finger can emit to the corresponding fingerprint identification device through the fingerprint hole, the fingerprint information of the finger is identified by utilizing the optical performance, and the fingerprint identification function under the screen of the display panel with the color film structure is realized.
Description
Technical Field
The application relates to the technical field of display, in particular to a display substrate and a display device.
Background
With the rapid development of scientific technology, various display devices with fingerprint identification functions, such as mobile phones, tablet computers, intelligent wearable devices and the like, appear in the market. Like this, the user just needs to touch display device's fingerprint identification module with the finger before the display device that the operation has the fingerprint identification function, just can carry out the authority and verify, has simplified the authority verification process.
Currently, the fingerprint identification method of an organic light-Emitting Diode (OLED) display panel mainly includes optical fingerprint identification under a screen and ultrasonic fingerprint identification under the screen, wherein the optical fingerprint identification becomes the mainstream in the market due to price advantage.
However, with the appearance of the OLED display panel with a COE (color Filter On encapsulation) structure, since a color film structure in the OLED display panel with a COE structure is opaque, the optical underscreen finger cannot be directly applied to the OLED product with a COE structure.
Disclosure of Invention
This application provides a display substrate and display device to the shortcoming of current mode to solve the problem that the OLED product of current COE structure can't directly adopt optical fingerprint identification under the screen.
In a first aspect, an embodiment of the present application provides a display substrate, including: the device comprises a substrate, a switching device layer, a functional device layer and a color film layer; the substrate comprises a display area and a fingerprint identification area; the functional device layer is positioned on one side of the substrate and comprises a plurality of light-emitting devices positioned in the display area and at least one fingerprint identification device positioned in the fingerprint identification area, and the fingerprint identification device is used for receiving light rays of the light-emitting devices reflected by a finger so as to identify fingerprint information of the finger; the switching device layer is positioned between the substrate and the functional device layer and comprises a first driving device for driving the light-emitting device and a second driving device for driving the fingerprint identification device; the first driving device is located in the display area, and the second driving device is located in the fingerprint identification area; the color film layer is located on one side, far away from the substrate, of the functional device layer and comprises a preset number of fingerprint holes, and the orthographic projections of the fingerprint holes on the substrate are located in the orthographic projections of the fingerprint identification devices on the substrate.
In one possible implementation, the first driving device includes a plurality of first driving device structures, and the second driving device includes a plurality of second driving device structures; the first driving device structure comprises a first active structure, a first grid and a first source drain structure; the second driving device structure comprises a second active structure, a second grid and a second source drain structure; the first active structure and the second active structure are arranged on the same layer, the first grid and the second grid are arranged on the same layer, and the first source drain structure and the second source drain structure are arranged on the same layer.
In one possible implementation manner, the fingerprint identification device comprises a first electrode structure, an optoelectronic layer structure and a second electrode structure which are arranged in a stacked mode; the first electrode structure multiplexes the second source drain structure; and/or the second electrode structure is a transparent electrode.
In one possible implementation manner, the color film layer includes a plurality of color film structures and a light shielding structure located between adjacent color film structures; the light-emitting device comprises a light-emitting layer, and the positions of the color film structures correspond to the positions of the light-emitting layer one by one; the shading structure is provided with a preset number of the fingerprint holes.
In one possible implementation, the display substrate further includes a light collimating structure; the light collimation structure is arranged on one side of the shading structure far away from the substrate, and the orthographic projection of the light collimation structure on the substrate is positioned in the fingerprint identification area; a collimating hole is arranged in the light collimating structure, and the center of the collimating hole is coincided with the center of the fingerprint hole; the material of the light collimating structure comprises a light blocking material.
In one possible implementation manner, the light collimation structure comprises a plurality of layers of black matrix diaphragms which are arranged in a stacked manner, and each layer of black matrix diaphragm is in an annular structure; the inner diameter of the black matrix diaphragm is the same as the aperture of the fingerprint hole.
In one possible implementation manner, the display substrate includes a plurality of pixel units arranged in an array, each pixel unit includes three adjacent sub-pixel units, and the sub-pixel units are located in the display area; each pixel unit is provided with one fingerprint hole, and the fingerprint hole is positioned in the fingerprint identification area; or, one fingerprint hole is arranged in a plurality of pixel units, and the fingerprint hole is positioned in the fingerprint identification area.
In one possible implementation, the functional device layer further includes a pixel definition layer including a plurality of first openings and at least one second opening; the orthographic projection of the first opening on the substrate is positioned in the display area, and the light-emitting layer is positioned in the first opening; the orthographic projection of the second opening on the substrate is located in the fingerprint identification area, and the orthographic projection of the second opening on the substrate is overlapped with the orthographic projection of the fingerprint hole on the substrate.
In one possible implementation, the display substrate further includes an encapsulation layer and a spacer; the spacer is positioned on one side of the pixel defining layer away from the substrate; the packaging layer is positioned on one side of the spacer away from the substrate and covers the pixel defining layer and the spacer; the color film layer is positioned on one side of the packaging layer far away from the substrate.
In a second aspect, embodiments of the present application further provide a display device, including the display substrate according to the first aspect.
The beneficial technical effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the display substrate provided by the embodiment of the application is provided with the fingerprint hole corresponding to the fingerprint identification device under the screen in the color film layer, so that light of the light-emitting device reflected by the finger can emit to the corresponding fingerprint identification device through the fingerprint hole, the fingerprint information of the finger is identified by utilizing the optical performance, and the fingerprint identification function under the screen of the display panel with the color film structure is realized.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view illustrating an internal structure of a display substrate according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a pixel structure of a display substrate according to an embodiment of the present disclosure;
fig. 3 is a schematic layout view of a pixel unit and a fingerprint hole of a display substrate according to an embodiment of the present disclosure;
fig. 4 is a schematic layout view of a pixel unit and a fingerprint hole of another display substrate according to an embodiment of the present disclosure;
fig. 5 is a schematic layout view of a pixel unit and a fingerprint hole of another display substrate according to an embodiment of the present disclosure;
fig. 6 is a schematic layout view of a pixel unit and a finger hole of another display substrate according to an embodiment of the present disclosure.
In the figure:
100-a substrate;
200-a buffer layer;
300-a switching device layer; 310-a first drive device structure; 320-a second drive device structure;
400-a functional device layer; 410-a light emitting device; 420-a fingerprint recognition device; 430-pixel definition layer; 431-a first opening; 432-a second opening;
500-an encapsulation layer;
600-a color film layer; 610-fingerprint hole
700-a light collimating structure; 710-black matrix stop.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
As shown in fig. 1, an embodiment of the present application provides a display substrate, including: the organic light emitting diode includes a substrate 100, and a switching device layer 300, a functional device layer 400, and a color film layer 600 stacked on the substrate 100. Here, for convenience of description, the substrate 100 is divided into a display area and a fingerprint recognition area in the present embodiment.
Specifically, the functional device layer 400 is positioned at one side of the substrate 100, and the functional device layer 400 includes a plurality of light emitting devices 410 positioned at the display region and at least one fingerprint recognition device 420 positioned at the fingerprint recognition region. The fingerprint recognition device 420 is used to receive light of the light emitting device 410 reflected by the finger to recognize fingerprint information of the finger.
It should be noted that the light emitting devices 410 around the fingerprint identification area are lighted under the control of the driving device, after the lighting, when the finger is placed in the fingerprint identification area, the light emitted by the lighted light emitting devices 410 is reflected back by the finger and received by the fingerprint identification device 420, the obtained fingerprint information is compared with the preset fingerprint information by converting the optical signal into the electrical signal, and if the comparison is consistent, the operations such as unlocking can be executed.
Further, the switching device layer 300 is located between the substrate 100 and the functional device layer 400, and includes a first driving device (not shown in fig. 1) for driving the light emitting device 410, and a second driving device (not shown in fig. 1) for driving the fingerprint recognition device 420; the first driving device is located in the display area, and the second driving device is located in the fingerprint identification area.
In this embodiment, the color film layer 600 is located on the side of the functional device layer 400 away from the substrate 100, and is spaced apart from the functional device layer 400. The color film layer 600 is provided with a preset number of fingerprint holes 610, and the fingerprint holes 610 and the fingerprint identification device 420 are correspondingly arranged (both located in the fingerprint identification area), so that the orthographic projection of the fingerprint holes 610 on the substrate 100 is located in the orthographic projection of the fingerprint identification device 420 on the substrate 100, and the light reflected back from the fingerprint holes 610 can be received by the fingerprint identification device 420.
In the display substrate provided in this embodiment, the color film layer 600 is provided with the fingerprint hole 610 corresponding to the underscreen fingerprint identification device 420, so that light of the light emitting device 410 reflected by a finger can be emitted to the corresponding fingerprint identification device 420 through the fingerprint hole 610, and thus fingerprint information of the finger can be identified by using optical performance, and an underscreen fingerprint identification function of a display panel with a color film structure is realized.
Optionally, a Buffer layer 200 is further disposed between the substrate 100 and the switching device layer 300 in this embodiment of the application, the Buffer layer 200 includes a PI layer and a Buffer layer in fig. 1, the PI layer is a flexible layer and can be used as a flexible substrate, and the Buffer layer can prevent water and oxygen from entering the device structure from below the substrate 100 to affect the characteristics of the switching device and the light emitting characteristics of the light emitting device 410.
In some embodiments, with continued reference to fig. 1, the first driving device includes a plurality of first driving device structures 310, i.e., each light emitting device 410 structure may be driven by a plurality of first driving device structures 310. The second driving device comprises a plurality of second driving device structures 320, i.e. each fingerprint identification device 420 may be driven by a plurality of second driving device structures 320.
Specifically, the first driving device structure 310 includes a first Active structure (illustrated as Active1 in fig. 1), a first Gate (illustrated as Gate1 in fig. 1), and a first source-drain structure (illustrated as SD1 in fig. 1). The first driving device structure 310 may have different device structures according to the operation principle, that is, the first gate may be located on a side of the first active structure away from the substrate 100, or on a side of the first active structure close to the substrate 100. The first gate is exemplarily illustrated in fig. 1 at a side of the first active structure away from the substrate 100.
Likewise, the second driving device structure 320 includes a second Active structure (illustrated as Active2 in fig. 1), a second Gate (illustrated as Gate2 in fig. 1), and a second source-drain structure (illustrated as SD2 in fig. 1). The second driving device structure 320 may have different device structures according to the operation principle, that is, the second gate may be located on a side of the second active structure away from the substrate 100, or on a side of the second active structure close to the substrate 100. The second gate is exemplarily illustrated in fig. 1 at a side of the second active structure away from the substrate 100.
Optionally, the switching device layer 300 further includes a gate insulating layer (illustrated as GI in fig. 1) and an interlayer insulating layer (illustrated as ILD in fig. 1). The grid insulation layer is used for isolating the first grid from the first active structure and isolating the second grid from the second active structure; the interlayer insulating layer is used for isolating the first grid electrode from the first source drain electrode structure and isolating the second grid electrode from the second source drain electrode structure.
In this embodiment, the first active structure and the second active structure are disposed on the same layer, that is, the first active structure and the second active structure are manufactured by using the same patterning process (a comprehensive film forming process and a patterning process). The first grid and the second grid are arranged on the same layer, namely the first grid and the second grid are manufactured by adopting the same composition process. The first source-drain structure and the second source-drain structure are arranged on the same layer, namely the first source-drain structure and the second source-drain structure are also prepared by adopting the same composition process.
In the display substrate provided by this embodiment, each film layer of the second driving device structure 320 for driving the fingerprint identification device 420 and each film layer of the first driving device structure 310 for driving the light emitting device 410 may be prepared by the same composition process, so that the manufacturing period of the whole product is shortened, and the production cost is saved.
In some embodiments, with continued reference to fig. 1, the fingerprint identification device 420 includes a first electrode structure (not shown in fig. 1), an electro-optic layer structure (illustrated in fig. 1 as PIN), and a second electrode structure (illustrated in fig. 1 as ITO) in a stacked arrangement. The first electrode structure and the second electrode structure are conductive to drive the photoelectric layer structure to work, so that the received light of the light emitting device 410 reflected by the finger can be converted into an electric signal.
In order to further reduce the process steps, the first electrode structure in this embodiment is multiplexed with the second source/drain structure, that is, the first electrode layer of the fingerprint identification device 420 is replaced with the second source/drain structure of the second driving device structure 320, so that only the photoelectric layer structure and the second electrode structure need to be manufactured in the manufacturing process of the fingerprint identification device 420.
Optionally, the second electrode structure is a transparent electrode to ensure that light of the light emitting device 410 reflected by the finger can pass through the second electrode structure to be received by the electro-optical layer structure. The material of the transparent electrode may include Indium Tin Oxide (ITO), among others.
Optionally, the photovoltaic layer structure in this embodiment is prepared by using a PIN photovoltaic material.
In the display substrate provided by this embodiment, the first electrode structure of the fingerprint identification device 420 may be reused as the second source/drain structure of the second driving device structure 320, so that the manufacturing period of the whole product is further shortened, and the process cost is further reduced.
In some embodiments, as shown in fig. 1 and fig. 2, the color filter layer 600 includes a plurality of color filter structures and a light shielding structure (referred to as BM in fig. 1 and fig. 2) located between adjacent color filter structures. Note that the BP layer in fig. 2 represents all film layer structures of the substrate 100 to the planarization layer (schematically, PLN) in fig. 1, and includes an Anode layer (Anode) of the light emitting device 410 and a second electrode layer (ITO) of the fingerprint recognition device 420. In addition, R, G, B subpixels in one pixel unit are also illustrated in fig. 2, respectively.
In this embodiment, the light emitting device 410 includes a light emitting layer (shown as EL in fig. 1 and fig. 2), the positions of the color film structures correspond to the positions of the light emitting layers one by one, and the light emitting color (R/G/B) of the light emitting layer is the same as the color (R/G/B) of the color film structure, so that the light of the light emitting layer is emitted from the corresponding color film structure, and the light of the light emitting layer of another adjacent color cannot be emitted from the color film structure, thereby improving the display effect of the entire display panel.
Further, the light shielding structure is provided with a preset number of fingerprint holes 610, that is, the fingerprint holes 610 are specifically arranged at the light shielding structure included in the color film layer 600, and the normal pixel light emitting area is not affected. Since the fingerprint holes 610 are located in the fingerprint identification area, that is, the fingerprint holes 610 are opened at the position of the light shielding structure corresponding to the fingerprint identification area, the number and the distribution positions of the fingerprint holes 610 need to be designed according to actual needs, and the embodiment is not particularly limited.
Optionally, with continued reference to fig. 1, the light emitting device 410 further includes an Anode layer (illustrated as Anode in fig. 1) on a side of the light emitting layer close to the substrate 100 and a Cathode layer (illustrated as Cathode in fig. 1) on a side of the light emitting layer away from the substrate 100. The anode layer is electrically connected to the first source/drain structure of the first driving device structure 310 through the via hole, so that the first driving device structure 310 controls the light emitting device 410 to emit light.
The display substrate that this embodiment provided sets up fingerprint hole 610 at the shading structure that color film layer 600 includes, under the condition of fingerprint identification device 420 normal work under the screen, can not influence the luminous of the peripheral normal pixel in fingerprint identification district, is favorable to promoting the display effect.
In some embodiments, with continued reference to fig. 1 and fig. 2, the display substrate provided in this embodiment further includes a light collimating structure 700, and the light collimating structure 700 can prevent external stray light from entering the fingerprint hole 610, so as to improve the accuracy of the fingerprint identification device 420 in fingerprint identification of a finger.
Specifically, the orthographic projection of the light collimating structure 700 on the substrate 100 is located in the fingerprint identification area, and the light collimating structure 700 is specifically arranged on the side of the light shielding structure away from the substrate 100. A collimating hole is formed in the light collimating structure 700, and the center of the collimating hole coincides with the center of the fingerprint hole 610, so as to ensure the light collimating effect.
Optionally, the material of the light collimating structure 700 comprises a light blocking material including, but not limited to, molybdenum, carbon black, and the like.
Alternatively, the light collimating structure 700 may also be made of the same material as the light shielding structure, for example: both are made of black resin materials.
Optionally, in this embodiment, the thickness of the light shielding structure around the fingerprint hole 610 may also be increased, which is equivalent to increasing the depth of the fingerprint hole 610, thereby playing the same role as the light collimating structure 700.
The display substrate that this embodiment provided sets up light collimation structure 700 through the position that corresponds to fingerprint hole 610 on one side of the light-shielding structure, can prevent that outside stray light from getting into fingerprint hole 610 to the center of the collimation hole of light collimation structure 700 and the center coincidence of fingerprint hole 610, with the collimation effect of guaranteeing light, thereby improve fingerprint identification device 420 and to finger fingerprint identification's accuracy.
Optionally, with continued reference to fig. 2, the light collimating structure 700 includes a plurality of layers of black matrix apertures 710 arranged in a stack, each layer of black matrix apertures 710 is a circular ring shaped structure, and the center of the fingerprint aperture 610 coincides with the center of the black matrix aperture 710.
In this embodiment, the inner diameter of the black matrix aperture 710 having the circular ring structure is the same as the aperture of the fingerprint hole 610, so that the light of the light emitting device 410 reflected by the finger can be received, and meanwhile, stray light in other areas is not introduced, which is beneficial to improving the accuracy and recognition efficiency of fingerprint recognition.
In some embodiments, as shown in fig. 2, 3 and 4, the display substrate in the embodiments of the present application includes a plurality of pixel units arranged in an array, each pixel unit includes three adjacent sub-pixel units (red (R), green (G) and blue (B), respectively), and all the sub-pixel units are located in the display region.
It should be noted that each pixel unit in this embodiment includes a light shielding structure (BM) between sub-pixels in addition to the adjacent R, G, B sub-pixels. The RGB sub-pixels in fig. 3 and 4 are arranged in a conventional manner, and the light emitting areas of the sub-pixels are the same.
Optionally, as shown in fig. 3, each pixel unit (a group of RGB sub-pixels) has a fingerprint hole 610 therein, and the fingerprint hole 610 is located in the fingerprint identification area, that is, a fingerprint hole 610 is opened at a position of the light shielding structure corresponding to the fingerprint identification area in each pixel unit.
Alternatively, as shown in fig. 4, one fingerprint hole 610 is provided in each of the plurality of pixel units (a group of RGB sub-pixels), and the fingerprint hole 610 is located in the fingerprint identification region. For example: a fingerprint hole 610 is formed in each two pixel units corresponding to the shading structure of the fingerprint identification area.
Optionally, as shown in fig. 5 and fig. 6, the pixel arrangement manner of the display substrate provided in the embodiment of the present application further includes a Pentile arrangement (P arrangement), that is, a sub-pixel (schematically, a G sub-pixel) is shared between adjacent pixel units, and the G sub-pixel in each pixel unit is half of the area of the R sub-pixel or the B sub-pixel. Fig. 5 illustrates a GGRB arrangement structure, fig. 6 illustrates a Diamond arrangement structure, and fig. 5 and fig. 6 both illustrate that each pixel unit (a group of RGB sub-pixels) is provided with a fingerprint hole 610, and the fingerprint hole 610 is located in a fingerprint identification region, that is, a fingerprint hole 610 is formed in each pixel unit at a position corresponding to a light shielding structure of the fingerprint identification region.
It should be noted that the number and distribution of the fingerprint holes 610 are not limited to the above example, as long as the number and positions of the fingerprint holes 610 can normally identify the fingerprint of the finger.
In some embodiments, with continued reference to fig. 1 and 2, the functional device layer 400 further includes a pixel definition layer 430 (illustrated as PDL in fig. 1 and 2), the pixel definition layer 430 including a plurality of first openings 431 and at least one second opening 432.
Specifically, the orthographic projection of the first opening 431 on the substrate 100 is located in the display area, and the light emitting layer is located in the first opening 431, so that interference between the light emitting layers of adjacent pixels is reduced, and the light emitting effect is ensured.
Further, the orthographic projection of the second opening 432 on the substrate 100 is located in the fingerprint identification area, and the orthographic projection of the second opening 432 on the substrate 100 is overlapped with the orthographic projection of the fingerprint hole 610 on the substrate 100, so as to ensure that the light reflected by the finger can be emitted from the second opening 432 to the fingerprint identification device 420 after passing through the fingerprint hole 610.
In the display substrate provided by this embodiment, the second opening 432 is formed at the position of the pixel defining layer 430 corresponding to the fingerprint hole 610, which is equivalent to only one layer of the packaging layer 500 is disposed between the fingerprint hole 610 and the fingerprint identification device 420, so that the transmission effect of the light reflected by the finger is further improved, and the sensitivity of fingerprint identification is improved.
In some embodiments, with continued reference to fig. 1, the display substrate further includes an encapsulation layer 500 and a Spacer (PS), the Spacer in this embodiment being illustrated as PS in fig. 1, and the encapsulation layer 500 being illustrated as TFE in fig. 1. The spacer is located on one side of the pixel defining layer 430 away from the substrate 100, and the spacer can support the mask in the preparation process of the light emitting layer, so that the bottom of the mask is prevented from being directly contacted with the light emitting layer to influence the manufacturing effect of the light emitting layer.
Specifically, the encapsulation layer 500 is located on a side of the spacer away from the substrate 100, and the encapsulation layer 500 covers both the pixel defining layer 430 and the spacer, i.e., the encapsulation layer 500 also serves to planarize the pixel defining layer 430 and the spacer. The color film layer 600 is disposed on a side of the encapsulation layer 500 away from the substrate 100, and since the encapsulation layer 500 is generally formed by stacking organic materials and inorganic materials, transmission of light reflected by a finger is not substantially affected.
In the display substrate provided by the embodiment, the spacer is arranged on the side of the pixel defining layer 430 away from the substrate 100, and the spacer can play a role in supporting the mask in the process of preparing the light emitting layer of the display substrate, so that the bottom of the mask is prevented from directly contacting with the light emitting layer, and the process quality of manufacturing the light emitting layer is ensured; and the encapsulation layer 500 is located between the functional device layer 400 and the color film layer 600, which protects the functional device layer 400 and does not affect the light passing from the fingerprint hole 610 to the fingerprint identification device 420.
It should be noted that the off-screen fingerprint identification described in the above embodiments of the present application means that the fingerprint identification device 420 is located in the encapsulation layer 500 of the OLED display substrate, and does not affect the normal pixel light emission of the display substrate.
Based on the same inventive concept, the embodiment of the present application further provides a display device, which includes the display substrate described in the embodiment of the present application. The display device in this embodiment may be an electronic device such as a mobile phone, a display, a television, or a tablet computer.
The display device provided by the embodiment of the application comprises the display substrate in the embodiment of the application, the display substrate is provided with the fingerprint hole corresponding to the fingerprint identification device under the screen in the color film layer, so that light of the light-emitting device reflected by the finger can emit to the corresponding fingerprint identification device through the fingerprint hole, the fingerprint information of the finger is identified by utilizing the optical performance, and the fingerprint identification under the screen of the OLED display panel with the color film structure is realized.
The embodiments of the application have at least the following technical effects:
1. the fingerprint hole corresponding to the under-screen fingerprint identification device is formed in the color film layer, so that light rays of the light-emitting device reflected by the finger can shoot to the corresponding fingerprint identification device through the fingerprint hole, the fingerprint information of the finger is identified by utilizing the optical performance, and the under-screen fingerprint identification function of the display panel with the color film structure is realized.
2. Each film layer of the second driving device structure for driving the fingerprint identification device can be prepared by adopting the same composition process with each film layer of the first driving device structure for driving the light-emitting device, so that the manufacturing period of the whole product is shortened, and the production cost is saved.
3. The first electrode structure of the fingerprint identification device can be reused with the second source drain electrode structure of the second driving device structure, so that the manufacturing period of the whole product is further shortened, and the process cost is further reduced.
4. Set up the fingerprint hole in the shading structure of various rete, under the circumstances of fingerprint identification device normal work under the screen, can not influence the luminous of the peripheral normal pixel in fingerprint identification district, be favorable to promoting display effect.
5. Set up light collimation structure through the position that corresponds to the fingerprint hole in shading structure one side, can prevent that outside stray light from getting into the fingerprint hole to the center in the collimation hole of light collimation structure and the center coincidence in fingerprint hole, with the collimation effect of guaranteeing light, thereby improve fingerprint identification device to finger fingerprint identification's accuracy.
6. The inner diameter of the black matrix diaphragm with the circular ring structure is consistent with the aperture of the fingerprint hole, so that light rays of the light-emitting device reflected by the finger can be received, stray light of other areas cannot be introduced, and the accuracy and the recognition efficiency of fingerprint recognition can be improved.
7. Set up the second opening through the position that corresponds to the fingerprint hole at pixel definition layer, be equivalent to only being provided with one deck encapsulated layer between fingerprint hole and the fingerprint identification device, further promoted by the transmission effect of the light of finger reflection to fingerprint identification's sensitivity has been promoted.
8. The spacer is arranged on one side, away from the substrate, of the pixel defining layer, and can play a role in supporting the mask plate in the process of preparing the light emitting layer of the display substrate, so that the bottom of the mask plate is prevented from directly contacting the light emitting layer, and the process quality of manufacturing the light emitting layer is guaranteed; and the encapsulation layer is located between functional device layer and the various rete, plays the guard action to functional device layer to can not influence and pass through from the light of fingerprint hole directive fingerprint identification device.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A display substrate, comprising:
a substrate including a display area and a fingerprint identification area;
the functional device layer is positioned on one side of the substrate and comprises a plurality of light-emitting devices positioned in the display area and at least one fingerprint identification device positioned in the fingerprint identification area, and the fingerprint identification device is used for receiving light rays of the light-emitting devices reflected by a finger so as to identify fingerprint information of the finger;
a switching device layer between the substrate and the functional device layer, including a first driving device for driving the light emitting device and a second driving device for driving the fingerprint recognition device; the first driving device is located in the display area, and the second driving device is located in the fingerprint identification area;
the color film layer is positioned on one side, far away from the substrate, of the functional device layer and comprises a preset number of fingerprint holes, and the orthographic projections of the fingerprint holes on the substrate are positioned in the orthographic projections of the fingerprint identification devices on the substrate.
2. The display substrate of claim 1, wherein the first driving device comprises a plurality of first driving device structures and the second driving device comprises a plurality of second driving device structures;
the first driving device structure comprises a first active structure, a first grid and a first source drain structure;
the second driving device structure comprises a second active structure, a second grid and a second source drain structure;
the first active structure and the second active structure are arranged on the same layer, the first grid and the second grid are arranged on the same layer, and the first source drain structure and the second source drain structure are arranged on the same layer.
3. The display substrate of claim 2, wherein the fingerprint identification device comprises a first electrode structure, an electro-optical layer structure, and a second electrode structure, which are stacked;
the first electrode structure multiplexes the second source drain structure; and/or the second electrode structure is a transparent electrode.
4. The display substrate of claim 1, wherein the color film layer comprises a plurality of color film structures and a light shielding structure located between adjacent color film structures;
the light-emitting device comprises a light-emitting layer, and the positions of the color film structures correspond to the positions of the light-emitting layer one by one; the shading structure is provided with a preset number of the fingerprint holes.
5. The display substrate of claim 4, comprising a light collimating structure; the light collimation structure is arranged on one side of the shading structure far away from the substrate, and the orthographic projection of the light collimation structure on the substrate is positioned in the fingerprint identification area;
a collimating hole is arranged in the light collimating structure, and the center of the collimating hole is coincided with the center of the fingerprint hole; the material of the light collimating structure comprises a light blocking material.
6. The display substrate of claim 5, wherein the light collimating structure comprises a plurality of layers of black matrix apertures arranged in a stack, each layer of black matrix apertures having an annular configuration;
the inner diameter of the black matrix diaphragm is the same as the aperture of the fingerprint hole.
7. The display substrate according to any one of claims 1 to 6, comprising a plurality of pixel units arranged in an array, wherein each pixel unit comprises three adjacent sub-pixel units, and the sub-pixel units are located in the display region;
each pixel unit is provided with one fingerprint hole, and the fingerprint hole is positioned in the fingerprint identification area;
or, one fingerprint hole is arranged in a plurality of pixel units, and the fingerprint hole is positioned in the fingerprint identification area.
8. The display substrate of claim 4, wherein the functional device layer further comprises a pixel definition layer comprising a plurality of first openings and at least one second opening;
the orthographic projection of the first opening on the substrate is positioned in the display area, and the light-emitting layer is positioned in the first opening;
the orthographic projection of the second opening on the substrate is located in the fingerprint identification area, and the orthographic projection of the second opening on the substrate is overlapped with the orthographic projection of the fingerprint hole on the substrate.
9. The display substrate of claim 8, further comprising an encapsulation layer and a spacer;
the spacer is positioned on one side of the pixel defining layer away from the substrate;
the packaging layer is positioned on one side of the spacer away from the substrate and covers the pixel defining layer and the spacer; the color film layer is positioned on one side of the packaging layer far away from the substrate.
10. A display device comprising the display substrate according to any one of claims 1 to 9.
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| CN202110286130.6A CN113066833B (en) | 2021-03-17 | 2021-03-17 | Display substrate and display device |
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| WO2023050115A1 (en) * | 2021-09-29 | 2023-04-06 | 京东方科技集团股份有限公司 | Display panel, display apparatus, and method for manufacturing display panel |
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