CN112364760A - Display device - Google Patents
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- CN112364760A CN112364760A CN202011246172.9A CN202011246172A CN112364760A CN 112364760 A CN112364760 A CN 112364760A CN 202011246172 A CN202011246172 A CN 202011246172A CN 112364760 A CN112364760 A CN 112364760A
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- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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Abstract
The application discloses a display device for reducing the thickness of a display product. An embodiment of the present application provides a display device, including: the display module and the grain identification module are positioned on the opposite side of the display surface of the display module; the display module assembly includes: the substrate and the buffer layer are alternately stacked, and each film layer of the pixel circuit is positioned on one side of the substrate, which is far away from the grain identification module; the grain identification module comprises a grain identification device, and the grain identification device is provided with a photosensitive area; the display device further includes: the collimation structure is positioned at the light incidence side of the grain identification device; the collimating structure comprises at least two light shielding layers; each light shielding layer is provided with a plurality of light holes, the light holes in each light shielding layer correspond to each other one by one, and at least part of the light holes are overlapped in the orthographic projection of the substrate; the orthographic projection of the photosensitive area of each fingerprint identification device on the substrate at least completely covers the orthographic projection of one light transmission hole; the substrate includes at least one light-shielding layer.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
With the rapid development of the information industry, biometric identification technology is more and more widely applied, and particularly, because fingerprints of different users are different, user identity confirmation is facilitated, so that the fingerprint identification technology is widely applied to a plurality of fields such as mobile terminals and smart homes, and safety guarantee is provided for user information.
Optical fingerprint recognition is one of the means for realizing fingerprint recognition. The principle of optical fingerprint identification is as follows: when a finger is placed above the display product, the light emitted by the light source contained in the display product irradiates the position of the valley and the ridge of the finger, and is reflected by the valley and the ridge of the finger and then enters the optical fingerprint identification device contained in the display product. Because the light intensity reflected by the valley and the ridge is different, the fingerprint identification device generates different electric signals according to the difference of the reflected light intensity, and the fingerprint identification is realized. In the prior art, an optical fingerprint identification scheme usually needs to be provided with a light path collimation layer, so that the thickness of a display product is influenced.
Disclosure of Invention
The embodiment of the application provides a display device, which is used for reducing the thickness of a display product.
An embodiment of the present application provides a display device, the display device includes: the display module is positioned on the opposite side of the display surface of the display module;
the display module assembly includes: the substrate and the buffer layer are alternately stacked, and each film layer of the pixel circuit is positioned on one side of the substrate, which is far away from the grain identification module;
the line identification module comprises a line identification device, and the line identification device is provided with a photosensitive area;
the display device further includes: the collimation structure is positioned at the light incidence side of the grain identification device;
the collimating structure comprises at least two light shielding layers; each light shielding layer is provided with a plurality of light holes, the light holes in each light shielding layer correspond to one another and are at least partially overlapped in the orthographic projection of the substrate; the orthographic projection of the photosensitive area of each fingerprint identification device on the substrate at least completely covers the orthographic projection of one light transmission hole;
the substrate comprises at least one light shielding layer.
In some embodiments, the substrate specifically comprises: the texture recognition module comprises a first substrate, a first buffer layer, a second buffer layer and a second substrate, wherein the first buffer layer is positioned on one side, facing the texture recognition module, of the first substrate;
the light shielding layer is located between the first buffer layer and the second base material, and/or the light shielding layer is located on one side of the second base material, which is far away from the first buffer layer.
In some embodiments, the display device further comprises a heat dissipation layer attached to one side of the substrate close to the texture recognition module;
when the light shielding layer is positioned on one side of the second base material, which is far away from the first buffer layer, the heat dissipation layer is reused as the light shielding layer.
In some embodiments, the substrate, the pixel circuit layers, and the texture recognition module each include at least one light-shielding layer.
In some embodiments, the texture recognition module further comprises: at least one protective layer on one side of the grain recognition device close to the substrate;
the light shielding layer is positioned on one side, away from the grain identification device, of the at least one protective layer.
In some embodiments, the texture recognition module further comprises: the supporting layer is positioned on one side, close to the substrate, of the shading layer, and the light-gathering part is positioned on one side, close to the substrate, of the supporting layer;
the orthographic projection of the light-gathering part on the substrate covers the orthographic projection of the light-transmitting hole on the substrate.
In some embodiments, the texture recognition module further comprises: a filter layer; the light filtering layer is positioned on one side of the light shielding layer, which is far away from the line identification device; the filter layer is used for blocking light with the wavelength larger than 600 nanometers from transmitting.
In some embodiments, each film layer of the pixel circuit comprises:
the conductive shading layer, the third buffer layer, the active layer, the first gate insulating layer, the first gate layer, the second gate insulating layer, the second gate layer, the interlayer insulating layer, the source drain electrode layer, the planarization layer and the pixel definition layer are sequentially arranged on one side, away from the grain identification module, of the substrate;
the conductive shading layer is reused as the shading layer;
and/or, the planarization layer is multiplexed as the light shielding layer;
and/or the pixel definition layer is multiplexed as the light shielding layer;
and/or, the light shielding layer includes: the light-transmitting hole is formed in the area where the first gate layer, the second gate layer and the source drain electrode layer are not overlapped with each other.
In some embodiments, the planarization layer comprises: the light-shielding planarization layer and the light-filtering planarization layer are positioned on one side, close to the substrate, of the light-shielding planarization layer;
the shading planarization layer is reused as the shading layer;
the filtering planarization layer is used for blocking light with the wavelength larger than 600 nanometers from transmitting.
In some embodiments, the pixel definition layer comprises: the light-shielding pixel definition layer and the light-filtering pixel definition layer are positioned on one side, away from the substrate, of the light-shielding pixel definition layer;
the light-shielding pixel defining layer is used as the light-shielding layer;
the light filtering pixel defining layer covers the light holes of the light shielding layer, and the light filtering pixel defining layer is used for blocking light with the wavelength larger than 600 nanometers from transmitting.
In some embodiments, the light-transmitting holes of different light-shielding layers coincide at the center of the orthographic projection of the substrate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another display device provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another display device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another display device provided in the embodiment of the present application;
fig. 5 is a schematic structural diagram of another display device provided in the embodiment of the present application;
fig. 6 is a schematic structural diagram of another display device provided in the embodiment of the present application;
fig. 7 is a schematic structural diagram of another display device provided in the embodiment of the present application;
fig. 8 is a schematic structural diagram of another display device provided in the embodiment of the present application;
fig. 9 is a schematic structural diagram of another display device according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of another display device provided in the embodiment of the present application;
fig. 11 is a schematic structural diagram of another display device according to an embodiment of the present disclosure;
fig. 12 is a schematic diagram of a display device texture imaging according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather 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.
It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present disclosure. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
An embodiment of the present application provides a display device, as shown in fig. 1, the display device includes: the display module comprises a display module 1 and a grain identification module 2 positioned on the opposite side of the display surface of the display module 1;
the display module 1 includes: the substrate 3 is formed by alternately stacking a substrate 4 and a buffer layer 5, and each film layer 15 of the pixel circuit is positioned on one side of the substrate 3, which is far away from the grain identification module 2;
the grain identification module 2 comprises a grain identification device 11 which is provided with a photosensitive area;
the display device further includes: a collimating structure located at the light incident side of the grain recognition device 11;
the collimating structure comprises at least two light shielding layers 10; each light shielding layer 10 is provided with a plurality of light holes 16, the light holes 16 in each light shielding layer 10 correspond to each other one by one and are at least partially overlapped in the orthographic projection of the substrate 3; the orthographic projection of the photosensitive area of each fingerprint identification device 11 on the substrate 3 at least completely covers the orthographic projection of one light transmission hole 16;
the substrate 3 includes at least one light-shielding layer 10.
It is to explain, the display device that this application embodiment provided can carry out fingerprint identification, palm line identification etc, use fingerprint identification as an example, when carrying out fingerprint identification, when the display surface of display module assembly is touched to the finger, the light trap that the light shield layer corresponds forms the collimation structure jointly, thereby the light trap that each light shield layer corresponds can be close to the screening of the alignment with the light of small angle, make its photosensitive zone that reachs below line identification device, line identification device can survey the intensity of taking out light, the energy of diffuse reflection light is different downwards by valley and ridge, the light intensity that a plurality of line identification devices survey and obtain is different, from this acquire fingerprint information, realize large tracts of land fingerprint identification.
The display device that this application embodiment provided, at least two-layer light shield layer that has the light trap is as the collimation structure, and display module assembly's basement is including the light shield layer that has the light trap, and this application light shield layer is integrated in the basement at least promptly to need not additionally to set up the light path collimation layer independent of display module assembly and line identification module, can reduce display device's thickness.
In some embodiments, the number of the light holes in each light-shielding layer is the same, and the light holes in each light-shielding layer form a one-to-one correspondence relationship.
During manufacturing, the light holes of the light shielding layers at the same position are completely overlapped at the orthographic projection center of the substrate as much as possible, but according to the alignment error of the actual manufacturing process, the light holes of the light shielding layers at the same position have certain offset, complete overlapping cannot be guaranteed, and partial overlapping can be realized.
In some embodiments, the light-transmitting holes of different light-shielding layers coincide at the center of the orthographic projection of the substrate.
When the light holes of the shading layers at the same position are completely overlapped at the orthographic projection center of the substrate, a trepanning structure is formed among the light holes at the same position, the effect of collimating the light rays incident to the position at various angles can be achieved, the light rays which form angles within a certain range with the normal line perpendicular to the surface of the collimating structure can pass through the trepanning structure, and the light rays exceeding the angles within the range are cut off. In some embodiments, the light-transmitting regions of the texture recognition device correspond to the trepan structure one-to-one. Of course, in some embodiments, the light-transmitting region of the texture recognition device may correspond to a plurality of trepan structures. In some embodiments, the hole pattern of the light hole may be a circle or a square, which is not limited herein.
In some embodiments, as shown in fig. 1, the texture recognition module 2 is attached to the display module 1 by an optical adhesive (OCA) 14.
In some embodiments, as shown in fig. 1, the substrate 3, the pixel circuit layers 15, and the texture recognition module 2 each include at least one light-shielding layer 10.
The utility model provides a display device's collimation structure who provides includes the three-layer light shield layer at least, the light shield layer of collimation structure is integrated in display module assembly and line identification module to need not additionally to set up the light path collimation layer independent of display module assembly and line identification module, can reduce display device's thickness, and all include at least one deck light shield layer in basement, each rete of pixel circuit, the line identification module, thereby can guarantee the distance between each light shield layer, guarantee the collimation printing opacity effect of collimation structure.
In fig. 1, the substrate, each film layer of the pixel circuit, and the texture recognition module all include a light-shielding layer for example. As shown in fig. 1, the substrate 3 includes a first light-shielding layer 17, each layer of the pixel circuit includes a second light-shielding layer 18, and the texture recognition module includes a third light-shielding layer 19.
In some embodiments, as shown in fig. 1, the substrate specifically comprises: the texture recognition module comprises a first substrate 6, a first buffer layer 7, a second buffer layer 8 and a second substrate 9, wherein the first buffer layer 7 is located on one side, facing the texture recognition module 2, of the first substrate 6, the second buffer layer 8 is located on one side, facing away from the texture recognition module 2, of the first substrate 6, and the second buffer layer 7 is located on one side, facing away from the first substrate 6.
In some embodiments, the material of the substrate includes, for example, polyimides, polyester materials, such as polymers of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and the like; in some embodiments, the substrate may also be glass, the glass having a thickness of 100 micrometers (μm) or less.
In some embodiments, the material of the buffer layer comprises silicon nitride or silicon oxide.
In some embodiments, when the substrate includes a light shielding layer, the light shielding layer is positioned between the first buffer layer and the second substrate; and/or the shading layer is positioned on one side of the second base material, which is far away from the first buffer layer.
In some embodiments, as shown in fig. 1 and 2, the substrate 3 includes a first light shielding layer 17.
In some embodiments, as shown in fig. 1, the first light shielding layer 17 is located between the first buffer layer 7 and the second substrate 9.
In a specific implementation, for example, the first buffer layer may be formed on the first substrate, and the light-shielding layer may be formed on the first buffer layer, so that the light-shielding layer and the first buffer layer have good adhesion, and the light-shielding layer may be prevented from falling off.
Alternatively, in some embodiments, as shown in fig. 2, the first light shielding layer 17 is located on a side of the second substrate 9 facing away from the first buffer layer 7.
Fig. 1 and fig. 2 illustrate the substrate including one light-shielding layer, but in some embodiments, when the substrate includes a light-shielding layer, two light-shielding layers may be included. In some embodiments, as shown in fig. 3, the substrate 3 includes: a first light-shielding layer 17 between the first buffer layer 7 and the second substrate 9, and a fourth light-shielding layer 20 on the side of the second substrate 9 facing away from the first buffer layer 7.
In a specific implementation, the light shielding layer included in the substrate may be made of a black matrix material commonly used in the display field, for example. The material of the light shielding layer may further include a polymer material.
In some embodiments, the display device further comprises a heat dissipation layer attached to one side of the substrate close to the texture recognition module;
when the light shielding layer is positioned on one side of the second base material, which is far away from the first buffer layer, the heat dissipation layer is reused as the light shielding layer.
According to the display device provided by the embodiment of the application, the heat dissipation layer is reused as the light shielding layer, namely the light transmission holes are formed in the heat dissipation layer, the preparation flow of the display device can be simplified, and the cost is saved.
In some embodiments, the material of the heat spreading layer comprises graphite, metal, or metal oxide. The metal may be, for example, copper, molybdenum, or a titanium/aluminum/titanium stack, and the metal oxide may be, for example, molybdenum oxide.
In some embodiments, when the texture recognition module includes a light shielding layer, as shown in fig. 1, the texture recognition module further includes: at least one protective layer 13 on one side of the texture recognition device close to the substrate;
the light shielding layer 10 is located on one side of at least one protective layer, which is far away from the grain recognition device.
In some embodiments, the texture recognition module 2 includes a light shield layer, and as shown in fig. 1, the texture recognition module includes a second light shield layer 18.
Of course, in the implementation, the texture recognition module may also include more light-shielding layers. As shown in fig. 4, the grain identifying module 2 includes a second light shielding layer 18 and a fifth light shielding layer 21. In fig. 4, the grain recognition module includes two protective layers 13, the second light shielding layer 18 is located between the two protective layers 13, and the fifth light shielding layer 21 is located on a side of the upper protective layer 13 departing from the grain recognition device 11. When the line identification module needs to set up multilayer light shield layer, can also set up multilayer protective layer when specific implementation, light shield layer and protective layer set up in turn.
In some embodiments, the display device further includes a filter layer for filtering ambient light to prevent the ambient light from interfering with the texture recognition. In specific implementation, the filter layer is used for blocking light with a wavelength of more than 600 nanometers from transmitting. The filter layer can be arranged on the grain identification module and can also be arranged on the display module.
In some embodiments, as shown in fig. 5, the texture recognition module further includes: a filter layer 25; the filter layer 25 is located on the side of the light shielding layer 10 away from the grain recognition device 11; the filter layer 25 is used to block light with a wavelength of more than 600 nm from passing through.
In some embodiments, the material of the filter layer comprises a polymer material. In specific implementation, a spin-on process may be used to form the filter layer.
In some embodiments, as shown in fig. 6, the texture recognition module further includes: a support layer 22 on the substrate side of the light shield layer 10, and a light-gathering portion 23 on the substrate side of the support layer 22;
the orthographic projection of the light-gathering part 23 on the substrate covers the orthographic projection of the light-transmitting hole 16 on the substrate.
The display device that this application embodiment provided sets up spotlight portion in the income light side of line identification device, and spotlight portion can play the effect of gathering the light beam, can improve the income light volume of line identification device light sensing zone to can improve the light utilization ratio.
In some embodiments, as shown in fig. 6, the light-condensing portion 23 is a lens structure.
In some embodiments, as shown in fig. 6, the texture recognition module further includes: a flat protective layer 24 on the side of the light-concentrating portions facing away from the support layer 22.
In some embodiments, as shown in fig. 6, the texture recognition module further includes: a substrate 12, a driving circuit layer 27, a third gate insulating layer 28, a first passivation layer 29, a sidewall protection layer 30, a resin layer 31, a second passivation layer 32, a bias line 33, a buffer insulating layer 34, a light shielding portion 35, a third passivation layer 36, and a shielding layer 37; the fingerprint recognition device 11 includes a first electrode 38, a photoelectric conversion layer 39, and a second electrode 40, which are stacked.
Fig. 6 illustrates an example in which the light-transmitting region of the texture recognition device corresponds to two light-transmitting holes.
In some embodiments, when the texture recognition module is provided with the filter layer, the resin of the resin layer may be replaced by a polymer material to serve as the filter layer.
In some embodiments, the substrate is a glass substrate, and the driving circuit layer includes a thin film transistor.
In some embodiments, as shown in fig. 7 to 9, each film layer of the pixel circuit includes:
and a conductive light shielding layer 41, a third buffer layer 42, an active layer 43, a first gate insulating layer 44, a first gate layer 45, a second gate insulating layer 46, a second gate layer 47, an interlayer insulating layer 48, a source/drain electrode layer 49, a planarization layer 50, and a pixel definition layer 51, which are sequentially disposed on a side of the substrate 3 away from the texture recognition module.
In some embodiments, when a light shielding layer is included in each layer of the pixel circuit, the conductive light shielding layer is reused as the light shielding layer;
and/or, the planarization layer is multiplexed as the light shielding layer;
and/or the pixel definition layer is multiplexed as the light shielding layer;
and/or, the light shielding layer includes: the light-transmitting hole is formed in the area where the first gate layer, the second gate layer and the source drain electrode layer are not overlapped with each other.
In specific implementation, as shown in fig. 7 to 9, the pixel defining layer has a pixel opening region 57, and the orthographic projection of the region where the pixel opening region 57 and the light hole 16 are located on the substrate does not overlap.
In some embodiments, as shown in fig. 7 to 9, the display module further includes: a support spacer 52 on the pixel defining layer, an anode 53 on the planarization layer at the pixel opening area, a light emitting functional layer 54 on the anode 53, a cathode 55 on the light emitting functional layer 54, and an encapsulation layer 56 on the cathode 55.
Next, the structure of the display module will be described in detail by taking an example in which each layer of the pixel circuit includes a light-shielding layer. As shown in fig. 7, the conductive light shielding layer 41 is multiplexed as the light shielding layer 10. As shown in fig. 8, the planarizing layer 50 is multiplexed as the light shielding layer 10. As shown in fig. 9, the pixel defining layer 51 is multiplexed as the light shielding layer 10.
In some embodiments, the display module further includes a filter layer.
In some embodiments, as shown in fig. 10, the planarization layer 50 includes: a light-shielding planarization layer 58, and a light-filtering planarization layer 59 on a side of the light-shielding planarization layer 58 close to the substrate 3;
the light-shielding planarizing layer 58 is multiplexed as the light-shielding layer 10;
the filter planarization layer 59 is used to block light having a wavelength of more than 600 nm from passing through.
Namely, the light-shielding planarization layer is used as a light-shielding layer, and the light-filtering planarization layer is used as a light-filtering layer.
In some embodiments, as shown in fig. 11, the pixel defining layer 51 includes: a light-shielding pixel defining layer 60, and a light-filtering pixel defining layer 61 located on a side of the light-shielding pixel defining layer 60 facing away from the substrate 3;
the light-shielding pixel defining layer 60 is multiplexed as the light-shielding layer 10;
the light filtering pixel defining layer 61 covers the light holes of the light shielding layer, and the light filtering pixel defining layer is used for blocking light with a wavelength larger than 600 nanometers from transmitting.
In a specific implementation, the material of the conductive light shielding layer includes, for example, a metal. The materials of the light-shielding planarizing layer and the light-shielding pixel defining layer include, for example, a light-shielding polymer. The filter planarization layer and the filter pixel definition layer include a polymer that filters out light having a wavelength greater than 600 nanometers.
In some embodiments, when the substrate, the pixel circuit layer and the texture recognition module all include a light-shielding layer having a light-transmitting hole, taking the substrate, the pixel circuit layer and the texture recognition module all include a light-shielding layer as an example, as shown in fig. 12, the fingerprint a contacts with the display surface 62 of the display device, and the distance between the first light-shielding layer 17 and the second light-shielding layer 18 is h1The distance between the first light-shielding layer 17 and the third light-shielding layer 19 is h2The aperture of the light-transmitting hole of the first light-shielding layer 17 is d1, the aperture of the light-transmitting hole of the second light-shielding layer 18 is d2, the aperture of the light-transmitting hole of the third light-shielding layer 19 is d3, and the collimation light-receiving angle θ satisfies the following relationship: tan θ ═ d2/(h1+h2). In specific implementations, the collimated light acceptance angle ranges from about-10 to about 10, and further the collimated light acceptance angle may also range from-4 to about 4. In a specific implementation, the distance between the light-shielding layers and the size of the light-transmitting hole of the light-shielding layer may be designed according to the range of the collimation light-receiving angle. In practice, it is differentThe sizes of the light holes in the light-shielding layer may be equal. The sizes of the light holes in different light shielding layers may not be equal, for example, d1, d2, and d3 are not equal, or two of d1, d2, and d3 may be equal. When any structure of the substrate, the pixel circuit layer and the texture identification module comprises a plurality of light shielding layers, the sizes of the light holes of the light shielding layers in the same structure can be equal. In a specific implementation, the insulating layer may be additionally disposed between the light-shielding layers to adjust a distance between the light-shielding layers, or the thickness of the film layer between the light-shielding layers is changed to adjust the distance between the light-shielding layers, so that the collimating and light-receiving angle of the collimating structure satisfies a requirement.
The display device provided by the embodiment of the application is as follows: 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.
To sum up, the display device that this application embodiment provided, at least two-layer light shield layer that has the light trap is as the collimation structure, and display module assembly's basement is including the light shield layer that has the light trap, and this application light shield layer is integrated in the basement at least promptly to need not additionally to set up the light path collimation layer that is independent of display module assembly and line identification module, can reduce display device's thickness.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (11)
1. A display device, characterized in that the display device comprises: the display module is positioned on the opposite side of the display surface of the display module;
the display module assembly includes: the substrate and the buffer layer are alternately stacked, and each film layer of the pixel circuit is positioned on one side of the substrate, which is far away from the grain identification module;
the line identification module comprises a line identification device, and the line identification device is provided with a photosensitive area;
the display device further includes: the collimation structure is positioned at the light incidence side of the grain identification device;
the collimating structure comprises at least two light shielding layers; each light shielding layer is provided with a plurality of light holes, the light holes in each light shielding layer correspond to one another and are at least partially overlapped in the orthographic projection of the substrate; the orthographic projection of the photosensitive area of each fingerprint identification device on the substrate at least completely covers the orthographic projection of one light transmission hole;
the substrate comprises at least one light shielding layer.
2. The display device according to claim 1, wherein the substrate particularly comprises: the texture recognition module comprises a first substrate, a first buffer layer, a second buffer layer and a second substrate, wherein the first buffer layer is positioned on one side, facing the texture recognition module, of the first substrate;
the light shielding layer is located between the first buffer layer and the second base material, and/or the light shielding layer is located on one side of the second base material, which is far away from the first buffer layer.
3. The display device of claim 2, further comprising a heat dissipation layer attached to a side of the substrate adjacent to the texture recognition module;
when the light shielding layer is positioned on one side of the second base material, which is far away from the first buffer layer, the heat dissipation layer is reused as the light shielding layer.
4. The display device as claimed in claim 1, wherein the substrate, the pixel circuit layers, and the texture recognition module each include at least one light-shielding layer.
5. The display device of claim 1 or 4, wherein the texture recognition module further comprises: at least one protective layer on one side of the grain recognition device close to the substrate;
the light shielding layer is positioned on one side, away from the grain identification device, of the at least one protective layer.
6. The display device of claim 5, wherein the texture recognition module further comprises: the supporting layer is positioned on one side, close to the substrate, of the shading layer, and the light-gathering part is positioned on one side, close to the substrate, of the supporting layer;
the orthographic projection of the light-gathering part on the substrate covers the orthographic projection of the light-transmitting hole on the substrate.
7. The display device of claim 5, wherein the texture recognition module further comprises: a filter layer; the light filtering layer is positioned on one side of the light shielding layer, which is far away from the line identification device; the filter layer is used for blocking light with the wavelength larger than 600 nanometers from transmitting.
8. The display device according to claim 1 or 4, wherein each film layer of the pixel circuit comprises:
the conductive shading layer, the third buffer layer, the active layer, the first gate insulating layer, the first gate layer, the second gate insulating layer, the second gate layer, the interlayer insulating layer, the source drain electrode layer, the planarization layer and the pixel definition layer are sequentially arranged on one side, away from the grain identification module, of the substrate;
the conductive shading layer is reused as the shading layer;
and/or, the planarization layer is multiplexed as the light shielding layer;
and/or the pixel definition layer is multiplexed as the light shielding layer;
and/or, the light shielding layer includes: the light-transmitting hole is formed in the area where the first gate layer, the second gate layer and the source drain electrode layer are not overlapped with each other.
9. The display device according to claim 8, wherein the planarization layer comprises: the light-shielding planarization layer and the light-filtering planarization layer are positioned on one side, close to the substrate, of the light-shielding planarization layer;
the shading planarization layer is reused as the shading layer;
the filtering planarization layer is used for blocking light with the wavelength larger than 600 nanometers from transmitting.
10. The display device according to claim 8, wherein the pixel defining layer comprises: the light-shielding pixel definition layer and the light-filtering pixel definition layer are positioned on one side, away from the substrate, of the light-shielding pixel definition layer;
the light-shielding pixel defining layer is used as the light-shielding layer;
the light filtering pixel defining layer covers the light holes of the light shielding layer, and the light filtering pixel defining layer is used for blocking light with the wavelength larger than 600 nanometers from transmitting.
11. The display device according to claim 1, wherein the light-transmitting holes of different light-shielding layers coincide at a center of an orthographic projection of the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246172.9A CN112364760A (en) | 2020-11-10 | 2020-11-10 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246172.9A CN112364760A (en) | 2020-11-10 | 2020-11-10 | Display device |
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| CN112364760A true CN112364760A (en) | 2021-02-12 |
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| CN202011246172.9A Withdrawn CN112364760A (en) | 2020-11-10 | 2020-11-10 | Display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140604A (en) * | 2021-04-15 | 2021-07-20 | 昆山国显光电有限公司 | Display panel |
| WO2022188161A1 (en) * | 2021-03-12 | 2022-09-15 | 京东方科技集团股份有限公司 | Display panel and display device |
| WO2023108688A1 (en) * | 2021-12-14 | 2023-06-22 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic device |
-
2020
- 2020-11-10 CN CN202011246172.9A patent/CN112364760A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022188161A1 (en) * | 2021-03-12 | 2022-09-15 | 京东方科技集团股份有限公司 | Display panel and display device |
| US11875596B2 (en) | 2021-03-12 | 2024-01-16 | Boe Technology Group Co., Ltd. | Display panel and display apparatus |
| CN113140604A (en) * | 2021-04-15 | 2021-07-20 | 昆山国显光电有限公司 | Display panel |
| WO2023108688A1 (en) * | 2021-12-14 | 2023-06-22 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic device |
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