CN108711378B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108711378B CN108711378B CN201810402762.2A CN201810402762A CN108711378B CN 108711378 B CN108711378 B CN 108711378B CN 201810402762 A CN201810402762 A CN 201810402762A CN 108711378 B CN108711378 B CN 108711378B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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Abstract
The invention discloses a display panel and a display device, wherein the display panel is provided with a display area, a fingerprint area and a frame area surrounding the display area and the fingerprint area; the display panel comprises a first substrate and a second substrate which are oppositely arranged; the first substrate comprises a plurality of first fingerprint electrodes, and the first fingerprint electrodes are positioned in the fingerprint area; the second substrate comprises a scanning line and a data line; and in the fingerprint identification stage in the second time, part of the scanning lines are multiplexed into a second fingerprint electrode, wherein the first fingerprint electrode and the second fingerprint electrode are used for realizing mutual capacitance type fingerprint detection. By the invention, the screen occupation ratio can be improved, and the reduction of the yield of the display panel caused by the low process yield of the cutting and edging of the special-shaped area can be avoided.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
Fingerprints are unique to every person, and with the development of science and technology, various display devices with fingerprint identification functions, such as mobile phones, tablet computers, intelligent wearable devices and the like, appear in the market. Before a user operates the display device with the fingerprint identification function, the user can carry out authority verification only by touching the display device with a finger, and the authority verification process is simplified.
Among the prior art, the display device that has the fingerprint identification function sets up the fingerprint identification module in the front usually, and generally sets up in display panel's lower frame, and this kind of display device requires display panel's lower frame to have certain width, is unfavorable for improving the screen and accounts for the ratio. In order to improve the screen ratio, more and more display panels use notch special-shaped design, namely, notches are cut on the display panels, and fingerprint identification modules are placed at the notches, but the accompanying problem is that the process yield of cutting and edging special-shaped areas is low, and the overall yield of the display panels is influenced.
Therefore, it is an urgent need in the art to provide a display panel and a display device that can improve the screen ratio and prevent the reduction of the yield of the display panel caused by the low yield of the irregular area cutting and edging process.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which solve the technical problem of the prior art that the yield of the display panel is reduced due to the cutting and edging of the irregular area to improve the screen ratio.
In one aspect, the present invention provides a display panel.
The display panel is provided with a display area, a fingerprint area and a frame area surrounding the display area and the fingerprint area; the display panel comprises a first substrate and a second substrate which are oppositely arranged; the first substrate comprises a plurality of first fingerprint electrodes, and the first fingerprint electrodes are positioned in the fingerprint area; the second substrate comprises a scanning line and a data line; in the display stage, the scanning lines are used for transmitting display scanning signals, and in the fingerprint identification stage, at least part of the scanning lines are multiplexed into a second fingerprint electrode, wherein the first fingerprint electrode and the second fingerprint electrode are used for realizing mutual capacitance type fingerprint detection.
In another aspect, the present invention provides a display device.
The display device comprises any one of the display panels provided by the invention.
Compared with the prior art, the display panel and the display device provided by the invention have the beneficial effects that:
the display panel is characterized in that one part of the area surrounded by the frame area is set as the display area for image display, the other part of the area is set as the fingerprint area for fingerprint identification, the fingerprint area is not required to be arranged in the frame area, the screen occupation ratio can be improved, meanwhile, when the fingerprint area is formed at the position of the display gap, the display panel is not required to be cut, the reduction of the yield of the display panel caused by the low process yield of special-shaped area cutting and edge grinding can be avoided, when the fingerprint identification is realized, the fingerprint detection is carried out based on the mutual capacitance principle, the first fingerprint electrode and the second fingerprint electrode are respectively arranged on the substrate at one side of the display panel, besides the detection of two-dimensional convex grains and concave grains of the fingerprint, the depth and the shape of the concave grains can be detected based on the size of the electric tolerance detected by the two measuring electrodes, a third-dimensional signal is formed, the safety of the fingerprint system is improved, and the second fingerprint electrode multiplexes the scanning lines, so that the thickness of the display panel is reduced.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the invention;
fig. 2 is a schematic diagram of a film structure of a display panel according to an embodiment of the invention;
FIG. 3 is a schematic diagram of scan lines of a display panel according to an embodiment of the invention;
FIG. 4 is a schematic diagram of scan lines of another display panel according to an embodiment of the invention;
fig. 5 is a schematic diagram of a film structure of another display panel according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a black matrix of a display panel according to an embodiment of the invention;
FIG. 8 is a schematic diagram of a display pixel of a display panel according to an embodiment of the invention;
FIG. 9 is a schematic diagram of a display pixel of another display panel according to an embodiment of the invention;
fig. 10 is a schematic top view illustrating another display panel according to an embodiment of the invention;
fig. 11 is a schematic view of a display device according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In an embodiment, fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention, as shown in fig. 1, the display panel has a display area AA, a fingerprint area FA, and a frame area BA surrounding the display area AA and the fingerprint area FA, wherein the shape and size of the fingerprint area FA can be set arbitrarily, and the shape of the fingerprint area FA can be a triangle, a quadrangle, a circle, an ellipse, an irregular shape, or the like. For example, in fig. 1, the fingerprint area FA is rectangular and is surrounded by the display area AA and the border area BA, so that the display area AA forms a gap. It should be noted that the notch at this position is not a notch on the physical structure, and the fingerprint area FA does not display an image, so that the display area AA forms a display notch, that is, the display area AA becomes a special-shaped display area.
Fig. 2 is a schematic diagram of a film structure of a display panel according to an embodiment of the present invention, and as shown in fig. 2, the display panel includes a first substrate 10, a second substrate 20 disposed opposite to each other, and a light-emitting functional layer 30 disposed between the first substrate 10 and the second substrate 20. The light emitting function layer 30 may be a liquid crystal material, an organic light emitting display material, electrophoretic particles, or other display materials.
Referring to fig. 1 and 2, the first substrate 10 includes a first substrate layer 11 and an electrode layer 12, wherein the electrode layer 12 may be disposed on a side of the first substrate layer 11 away from the second substrate 20 (shown in fig. 2), or the electrode layer 12 may be disposed on a side of the first substrate layer 11 close to the second substrate 20, and the electrode layer 12 may be made of a conductive thin film material or a metal material. A plurality of first fingerprint electrodes FA1 are formed on the electrode layer 12, and the first fingerprint electrodes FA1 are located in the fingerprint areas FA, wherein when the light-emitting functional layer 30 is made of a liquid crystal material, the first substrate 10 is a color film substrate, and in an embodiment, structures such as a color resistor and a black matrix are further disposed on the color film substrate; when the light emitting function layer 30 is an organic light emitting display material, the first substrate 10 is a package cover plate.
The second substrate 20 includes a second base layer 21 and a metal film layer 22 formed on the second base layer 21, where the metal film layer 22 may include a single metal layer, two metal layers, or two or more metal layers, and when the metal film layer 22 includes two or more metal layers, an insulating layer is further disposed between adjacent metal layers. The scan lines S and the data lines D are disposed on the metal film layer 22, and may be disposed on different metal layers, or partially disposed on the same metal layer and partially disposed on different metal layers. In one embodiment, when the display panel is a liquid crystal display panel, as shown in fig. 1, the scan lines S extend along a first direction x, the data lines D extend along a second direction y, and the scan lines S and the data lines D intersect to define a display pixel P. When the display panel is an organic light emitting display panel, the second substrate 20 further includes a pixel defining layer defining a plurality of display pixels. In addition, the metal film layer 22 is further configured to provide a pixel circuit, where the pixel circuit includes device structures such as a thin film transistor, the scan line S is configured to provide a display scan signal to the pixel circuit, the data line D is configured to provide a display data signal to the pixel circuit, and for a display pixel P selected by the display scan signal, when a data signal is correspondingly written to the pixel circuit corresponding to the display pixel P on the data line D, the pixel P displays a gray scale, and the plurality of display pixels P correspondingly display respective gray scales, so as to implement image display.
The control time sequence of the display panel comprises a display stage and a fingerprint identification stage, wherein the display stage and the fingerprint identification stage can be alternately arranged, or one fingerprint identification stage is arranged at intervals of a plurality of display stages. And image display is carried out in the display stage, and the fingerprint pattern received in the fingerprint area FA is identified in the fingerprint identification stage. In the display stage, the scan lines S are used for transmitting display scan signals, in the fingerprint identification stage, at least a part of the scan lines S are multiplexed as the second fingerprint electrodes FA2, optionally, in an embodiment, the scan lines S routed through the fingerprint area FA are multiplexed as the second fingerprint electrodes FA2, in the fingerprint area FA, the first fingerprint electrodes FA1 on one side of the first substrate 10 serve as fingerprint identification detection electrodes to provide fingerprint identification signals, the fingerprint identification function is realized by generating coupling capacitance change through finger contact, and meanwhile, based on the size of the capacitance difference detected by the first fingerprint electrodes FA1 and the second fingerprint electrodes FA2, the depth and the shape of the concave stripes can be detected, fingerprint detection is realized, and fingerprint identification is completed.
By adopting the display panel provided by the embodiment, one part of the area surrounded by the frame area is set as the display area for image display, the other part is set as the fingerprint area for fingerprint identification, the fingerprint area is not required to be set in the frame area, the screen occupation ratio can be improved, meanwhile, when the fingerprint area is formed at the position of the display gap, the display panel is not required to be cut, the reduction of the yield of the display panel caused by the low process yield of the cutting of the special-shaped area and the edging can be avoided, when the fingerprint identification is realized, the fingerprint detection is carried out based on the mutual capacitance principle, the first fingerprint electrode and the second fingerprint electrode are respectively arranged on the substrate at one side of the display panel, besides the detection of the two-dimensional convex grains and concave grains of the fingerprint, the depth and the shape of the concave grains can be detected based on the electric capacity difference detected by the two measuring electrodes, the third-dimensional signal is formed, and, the safety of the fingerprint system is improved, and the second fingerprint electrode multiplexes the scanning lines, so that the thickness of the display panel is reduced.
In an embodiment, fig. 3 is a schematic diagram of scan lines of a display panel according to an embodiment of the invention, fig. 4 is a schematic diagram of scan lines of another display panel according to an embodiment of the invention, and as shown in fig. 3 and fig. 4, a scan line S multiplexed as the second fingerprint electrode FA2 includes a scan line expansion portion S1 and a scan line main body portion S2 extending in the first direction x, wherein the scan line expansion portion S1 is connected to the scan line main body portion S2, and the scan line expansion portion S1 is located in the fingerprint area FA.
By adopting the display panel provided by the embodiment, the scanning lines in the fingerprint area are expanded, and the scanning line expansion part is expanded on the basis of the scanning line main body part, so that the area of the scanning lines in the fingerprint area is substantially increased. Through the area of scan line (also be the second fingerprint electrode) in the increase fingerprint district, the mutual capacitive coupling area of increase first fingerprint electrode and second fingerprint electrode increases fingerprint identification's semaphore, promotes fingerprint identification's accuracy. Meanwhile, in the display area, the scanning line extension part can be omitted, so that normal wiring of the main part of the scanning line is maintained, and the influence of increased setting of the scanning line on the display effect is reduced.
In one embodiment, with continued reference to fig. 3 and 4, in the second direction y, the width W1 of the scan line S in the fingerprint area FA is 30 micrometers to 100 micrometers, where the width W1 of the scan line S refers to the entire width of the scan line S, the width W2 of the first fingerprint electrode FA1 is 30 micrometers to 100 micrometers, and the orthographic projection of the first fingerprint electrode FA1 on the second substrate 20 in the second direction y at least partially overlaps the area where the scan line S is located, optionally, in the fingerprint area FA, the orthographic projection of the first fingerprint electrode FA1 on the second substrate 20 in the second direction y completely covers the area where the scan line S is located, where the first direction x is perpendicular to the second direction y.
With the display panel provided by this embodiment, first, by adding the scan line extension portion in the fingerprint region, the width of the scan line is set to be 30 to 100 micrometers, which is larger than the width of a conventional scan line, so that the mutual capacitance coupling area between the first fingerprint electrode and the second fingerprint electrode can be increased; on the basis, the width of the first fingerprint electrode is set to be 30-100 micrometers, so that the fingerprint identification precision can be met, and the large operation amount of fingerprint identification is avoided; moreover, set up the orthographic projection of first fingerprint electrode on the second base plate in the second direction and cover the scan line, that is, W2 is greater than W1 and first fingerprint electrode is relative with the second fingerprint electrode, the mutual capacitive coupling area of the increase two electrodes of further maximize, increase fingerprint identification's semaphore, promote fingerprint identification's accuracy.
In one embodiment, as shown in fig. 3, the orthographic projection of the scan line expansion portion S1 on the first substrate 10 is in a grid shape, and the grid shape is adopted, so that for the liquid crystal display panel, the light quantity of the backlight source in the fingerprint area FA is increased, and some personalized pattern displays can be set in the fingerprint area FA, for example, logo of the manufacturer of the display device, and the like. In another embodiment, as shown in fig. 4, the orthographic projection of the scan line expansion portion S1 on the first substrate 10 is in a block shape, and by providing the block-shaped scan line expansion portion, the mutual capacitive coupling area between the first fingerprint electrode and the second fingerprint electrode is increased, the signal amount of fingerprint identification is increased, and the accuracy of fingerprint identification is improved.
In an embodiment, fig. 5 is a schematic diagram of a film structure of another display panel according to an embodiment of the invention, as shown in fig. 5, the display panel includes a first substrate 10 and a second substrate 20, the first substrate 10 includes a first base layer 11 and an electrode layer 12, the electrode layer 12 is disposed on a side of the first base layer 11 close to the second substrate 20, and a plurality of first fingerprint electrodes FA1 are disposed on the electrode layer 12.
Further, in an embodiment, with reference to fig. 5, the first substrate 10 further includes a black matrix 14 and a planarization layer 15, wherein the black matrix 14 is disposed on a side of the first substrate layer 11 close to the second substrate 20, and the planarization layer 15 is disposed on a side of the black matrix 14 away from the first substrate layer 11, specifically, the electrode layer 12 may be disposed between the first substrate layer 11 and the black matrix 14, as shown in fig. 5, or the electrode layer 12 may also be disposed between the black matrix 14 and the planarization layer 15.
With the display panel provided in this embodiment, when the first substrate 10 is manufactured, after the black matrix 14 and the electrode layer 12 are manufactured on the first base layer 11, if the color resistor is disposed on the first substrate 10, and after the color resistor layer is manufactured, the planarization layer 15 is manufactured, which can compensate the non-uniform thickness of the first substrate 10 caused by manufacturing the first fingerprint electrode on the electrode layer 12, and is beneficial to manufacturing the alignment film for the liquid crystal display panel.
In an embodiment, fig. 6 is a schematic view illustrating a film structure of another display panel according to an embodiment of the present disclosure; as shown in fig. 6, the display panel includes a first substrate 10 and a second substrate 20, the first substrate 10 includes a first base layer 11 and an electrode layer 12, the electrode layer 12 is disposed on a side of the first base layer 11 away from the second substrate 20, and a plurality of first fingerprint electrodes FA1 are disposed on the electrode layer 12.
Further, in an embodiment, with reference to fig. 6, the first substrate 10 further includes a black matrix 14, and the black matrix 14 is disposed on a side of the first base layer 11 close to the second substrate 20.
By adopting the display panel provided by the embodiment, the black matrix 14 and the electrode layer 12 are respectively arranged on two sides of the first substrate layer 11, the first fingerprint electrode arranged on the electrode layer 12 does not affect the black matrix 14 and the alignment film, and a planarization layer does not need to be arranged on the electrode layer, so that the display panel is favorably thinned.
In an embodiment, fig. 7 is a schematic view of a black matrix of a display panel according to an embodiment of the invention, and referring to fig. 5 to 7, no matter which film layer of the first substrate 10 the black matrix 14 is disposed on, in the display area AA, the black matrix 14 has an opening area O, and the opening area O is disposed corresponding to the display pixel. In the fingerprint area FA, the black matrix 14 is not provided with an open area.
Adopt the display panel that this embodiment provided, because the fingerprint district does not carry out image display, do not set up the opening with the black matrix in the fingerprint district, can avoid the influence of fingerprint district light leak to the display area display image.
The display panel includes a plurality of display pixels, and for the liquid crystal display panel, the scanning lines and the data lines intersect to define the plurality of display pixels, and for the organic light emitting display panel, the array substrate (i.e., the second substrate) includes a pixel defining layer, the pixel defining layer is provided with openings, and organic light emitting display materials are evaporated at the positions of the openings to form the display pixels, i.e., the display pixels of the organic light emitting display panel are defined by the pixel defining layer. Whichever display panel, in one embodiment the orthographic projection of a single first fingerprint electrode on the second substrate overlaps a single display pixel. Taking a liquid crystal display panel as an example, fig. 8 is a schematic diagram of a display pixel of a display panel according to an embodiment of the present invention, a scan line expansion portion shown in fig. 8 is in a grid shape, fig. 9 is a schematic diagram of a display pixel of another display panel according to an embodiment of the present invention, a scan line expansion portion shown in fig. 9 is in a block shape, fig. 8 and fig. 9 show structures of three display pixels in a fingerprint area, and meanwhile, in order to clearly show the structures, only one of the display pixels shows that a first fingerprint electrode overlaps with a single display pixel. As shown in fig. 8 and 9, the data line D intersects the scan line main body portion S2 to define a display pixel P, which includes a thin film transistor T including a gate electrode, a source electrode, and a drain electrode, and a pixel electrode P' connected to the drain electrode of the thin film transistor T, the data line D connected to the source electrode of the thin film transistor T, and the scan line main body portion S2 connected to the gate electrode of the thin film transistor T. Note that the structures of the thin film transistor T and the pixel electrode P' included in the display pixel P in the fingerprint region are the same as those of the display pixel in the display region, but the fingerprint region does not display an image. In the fingerprint area, the first fingerprint electrode FA1 is disposed corresponding to the position of the single display pixel P, overlapping the single display pixel P. Optionally, the first finger electrodes FA1 are approximately the same size as a single display pixel P, but it should be noted that, without being strictly limited to the exact same, the first finger electrodes FA1 may be slightly larger or smaller than a single display pixel P.
By adopting the display panel provided by the embodiment, the first fingerprint electrode is arranged corresponding to the display pixels in size and position, so that the first fingerprint electrode and the scanning line (i.e. the second fingerprint electrode) have larger capacitive coupling area.
In an embodiment, with continuing reference to fig. 1 and fig. 2, the second substrate 20 further includes a peripheral circuit 23 disposed in the frame area BA, the first substrate 10 further includes electrode leads 13, the electrode leads 13 may be made of a metal material, specifically, a metal layer is disposed on the electrode layer 12, an insulating layer is disposed between the electrode layer 12 and the metal layer, the metal layer is etched to form a pattern of the electrode leads 13, and each electrode lead 13 is electrically connected to one first fingerprint electrode FA1 through a via K, meanwhile, the electrode lead 13 is also electrically connected to the peripheral circuit 23 on the second substrate 20, the peripheral circuit 23 may be configured as a circuit for performing fingerprint identification, and is integrated in a control chip of the display panel, and the electrode leads 13 in the same configuration obtain a fingerprint signal on the first fingerprint electrode FA 1. Further, in an embodiment, as shown in fig. 1, when the first fingerprint electrodes FA1 are arranged in a matrix array, the first fingerprint electrodes FA1 can be reused as touch electrodes for touch detection based on the self-capacitance principle. In further embodiments, each electrode lead 13 may be electrically connected with two or more first fingerprint electrodes FA1 to reduce the number of electrode leads 13.
In another embodiment, fig. 10 is a schematic top view structure of another display panel according to the embodiment of the invention, and as shown in fig. 10, compared to the embodiment in which the first fingerprint electrodes FA1 are arranged in a matrix array, in this embodiment, the first fingerprint electrodes FA1 are stripe electrodes extending along the second direction y. Further, in an embodiment, the first fingerprint electrode FA1 can be multiplexed into one side touch electrode for touch detection based on the mutual capacitance principle, and the other side touch electrode for touch detection.
The above is an embodiment of the display panel provided in the present application, and the present application further provides a display device, where the display device includes any one of the display panels provided in the present invention, fig. 11 is a schematic diagram of the display device provided in the embodiment of the present application, and as shown in fig. 11, the display device includes a housing 01 and a display panel 02 accommodated in the housing 01, and the display panel has the technical effects and corresponding technical features and technical effects of any one of the display panels, and is not described herein again.
According to the embodiment, the display panel and the display device of the invention have the following beneficial effects:
the display panel provided by the application, one part of the area surrounded by the frame area is set as the display area for image display, the other part is set as the fingerprint area for fingerprint identification, the fingerprint area is not required to be arranged in the frame area, the screen occupation ratio can be improved, meanwhile, when the fingerprint area is formed at the position of the display gap, the display panel is not required to be cut, the reduction of the yield of the display panel caused by the low process yield of the irregular area cutting and edge grinding can be avoided, when the fingerprint identification is realized, the fingerprint detection is carried out based on the mutual capacitance principle, the first fingerprint electrode and the second fingerprint electrode are respectively arranged on the substrate at one side of the display panel, except the detection of the two-dimensional convex grains and concave grains of the fingerprint, the depth and the shape of the concave grains can be detected based on the capacitance difference detected by the two measuring electrodes, the third-dimensional signal is formed, and the accuracy of the fingerprint, the safety of the fingerprint system is improved, and the second fingerprint electrode multiplexes the scanning lines, so that the thickness of the display panel is reduced.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (13)
1. A display panel is characterized in that a plurality of pixels are arranged in a matrix,
the display panel is provided with a display area, a fingerprint area and a frame area surrounding the display area and the fingerprint area;
the display panel comprises a first substrate and a second substrate which are oppositely arranged;
the first substrate comprises a plurality of first fingerprint electrodes, the first fingerprint electrodes are located in the fingerprint area, the display panel comprises a plurality of display pixels, and the orthographic projection of a single first fingerprint electrode on the second substrate is overlapped with a single display pixel;
the second substrate comprises a scanning line and a data line;
in the display stage, the scanning lines are used for transmitting display scanning signals, in the fingerprint identification stage, at least part of the scanning lines are multiplexed into a second fingerprint electrode, the scanning lines which are multiplexed into the second fingerprint electrode comprise a scanning line expansion part and a scanning line main body part extending in the first direction, the orthographic projection of the scanning line expansion part on the first substrate is of a block structure, and the same scanning line main body part is electrically connected with a plurality of scanning line expansion parts, wherein the scanning line expansion part is connected with the scanning line main body part and is positioned in the fingerprint area, and the first fingerprint electrode and the second fingerprint electrode are used for realizing mutual capacitance type fingerprint detection.
2. The display panel according to claim 1,
in a second direction, the width of the scanning line in the fingerprint area is 30 micrometers to 100 micrometers, the width of the first fingerprint electrode is 30 micrometers to 100 micrometers, and in the second direction, the orthographic projection of the first fingerprint electrode on the second substrate is at least partially overlapped with the area where the scanning line is located, wherein the first direction is perpendicular to the second direction.
3. The display panel according to claim 1, wherein the first substrate comprises:
a base layer;
the electrode layer is arranged on one side, close to the second substrate, of the base layer, and the first fingerprint electrodes are arranged on the electrode layer.
4. The display panel according to claim 3, wherein the first substrate further comprises:
the black matrix is arranged on one side, close to the second substrate, of the base layer;
a planarization layer disposed on a side of the black matrix away from the base layer,
wherein the electrode layer is located between the substrate layer and the black matrix, or between the black matrix and the planarization layer.
5. The display panel according to claim 1, wherein the first substrate comprises:
a base layer;
the electrode layer is arranged on one side, far away from the second substrate, of the base layer, and the first fingerprint electrodes are arranged on the electrode layer.
6. The display panel according to claim 5, wherein the first substrate further comprises:
and the black matrix is arranged on one side of the base layer close to the second substrate.
7. The display panel according to claim 4 or 6,
in the display region, the black matrix has an opening region, and in the fingerprint region, the black matrix is not provided with the opening region.
8. The display panel according to claim 3 or 5,
the electrode layer is made of a conductive film material or a metal material.
9. The display panel according to claim 1,
the display panel is a liquid crystal display panel, and the scanning lines and the data lines are crossed to define a plurality of display pixels.
10. The display panel according to claim 1,
the display panel is an organic light emitting display panel, and the second substrate includes a pixel defining layer defining a plurality of display pixels.
11. The display panel according to claim 1,
the second substrate further includes: the peripheral circuit is arranged in the frame area;
the first substrate further includes: and the electrode lead is respectively connected with the first fingerprint electrode and the peripheral circuit.
12. The display panel according to claim 1,
the shape of the fingerprint area is triangle, quadrangle, circle, ellipse or irregular shape.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.
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| CN107272244B (en) * | 2017-08-15 | 2020-12-08 | 京东方科技集团股份有限公司 | Array substrate and manufacturing method thereof, display panel and display device |
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| CN104155785A (en) * | 2014-08-07 | 2014-11-19 | 京东方科技集团股份有限公司 | Array substrate, driving method of array substrate and display device |
| CN104252277A (en) * | 2014-09-18 | 2014-12-31 | 叶志 | Touch panel array and scanning method used for same |
| CN107025451A (en) * | 2017-04-27 | 2017-08-08 | 上海天马微电子有限公司 | Display panel and display device |
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