CN110008883B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110008883B CN110008883B CN201910243475.6A CN201910243475A CN110008883B CN 110008883 B CN110008883 B CN 110008883B CN 201910243475 A CN201910243475 A CN 201910243475A CN 110008883 B CN110008883 B CN 110008883B
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- fingerprint identification
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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
Abstract
The invention discloses a display panel and a display device, and relates to the technical field of display, wherein the display panel comprises a display area and a non-display area; the display area comprises a plurality of sub-pixels, a plurality of scanning lines, a plurality of data lines, a plurality of fingerprint identification units, a plurality of fingerprint scanning lines and a plurality of fingerprint signal lines; the non-display area comprises a fingerprint identification driving circuit and a scanning driving circuit, the fingerprint identification driving circuit comprises a plurality of stages of mutually cascaded fingerprint identification driving units, and the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line; any one level of fingerprint identification drive unit provides drive signals for a group of fingerprint identification units, and a group of fingerprint identification units comprises at least two lines of fingerprint identification units, and any two of the same group of fingerprint identification units are electrically connected with different fingerprint signal lines respectively. The invention can lead at least two rows of fingerprint identification units to carry out fingerprint identification work at the same time, further improves the speed of fingerprint identification, does not need to increase the cost and has higher feasibility.
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
The skin lines of each person are different in pattern, break points and intersection points, so that the skin lines of each person are unique and invariable throughout the life. Accordingly, the real identity of each person can be verified through the skin texture recognition technology. Meanwhile, because the line characteristics of the fingerprint formed on the surface of the tail end of the finger of the individual are easy to acquire, the individual can be generally corresponding to the fingerprint of the individual, and the acquired fingerprint is compared with the pre-stored fingerprint data to verify the real identity of the individual, which is a fingerprint identification technology. Fingerprint identification as a biological identification mode provides a huge role in protecting personal privacy, and electronic products in the market are almost equipped with a fingerprint identification system: automobiles, cell phones, punched-card machines, etc. Mobile smart devices, such as mobile phones, smart bands, etc., have been equipped with fingerprint recognition devices.
In recent years, thanks to the combination and development of electronic integrated manufacturing technology and algorithm research, the technology of combining fingerprint identification technology and display technology has started to enter our daily life, becomes the technology of the most deep, widely applied and developed display technology at present, and combines the fingerprint identification technology and the display technology to enable the display panel to have not only a display function but also fingerprint identification, thereby enriching the functions of the display panel and improving the safety performance of the display panel.
But at present, fingerprint identification devices are all positioned in a non-display area, so that the screen occupation ratio is reduced; some mobile phone fingerprint identification is positioned on the back of the mobile phone, but the experience feeling of the user is reduced. With the development of full-screen displays, it is becoming more and more urgent to provide a display device with fingerprint recognition in the display area. Along with the release of full screen, the researcher adopts under the screen fingerprint technique to set up whole display area into the fingerprint identification region, promptly, it is provided with a plurality of fingerprint identification units to correspond in the whole display area, form fingerprint identification components and parts array, then set up drive circuit through the frame district at display panel, realize the drive of fingerprint identification components and parts array, accomplish fingerprint identification, thereby the design of the comprehensive screen of realization that can be better, avoid the fingerprint identification region to occupy the too much space in non-display area. At present, a capacitance fingerprint identification mode and an optical fingerprint identification mode are common fingerprint identification modes. A display panel having a high response speed and a high screen ratio has been a trend.
Therefore, it is an urgent need to solve the technical problem of the present invention to provide a display panel and a display device with high feasibility, which can increase the fingerprint recognition speed without increasing the cost.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device, which aim to improve the fingerprint recognition speed.
The present invention provides a display panel, comprising: a display area and a non-display area; the display area comprises a plurality of sub-pixels arranged in an array mode, a plurality of scanning lines extending along a first direction, and a plurality of data lines extending along a second direction; the display area also comprises a plurality of fingerprint identification units arranged in an array, a plurality of fingerprint scanning lines and a plurality of fingerprint signal lines; wherein the first direction intersects the second direction; the non-display area comprises a fingerprint identification driving circuit and a scanning driving circuit, the fingerprint identification driving circuit comprises a plurality of stages of fingerprint identification driving units which are mutually cascaded, the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line, and the scanning driving circuit is electrically connected with the scanning line; any one level of fingerprint identification drive unit provides drive signals for a group of fingerprint identification units, and a group of fingerprint identification units comprises at least two lines of fingerprint identification units, and any two of the same group of fingerprint identification units are electrically connected with different fingerprint signal lines respectively.
Based on the same idea, the invention also provides a display device comprising the display panel.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the display panel provided by the invention comprises a plurality of sub-pixels which are used for displaying and are arranged in an array mode, a plurality of scanning lines which extend along a first direction, a plurality of data lines which extend along a second direction, a plurality of fingerprint identification units which are used for realizing fingerprint identification and are arranged in an array mode, a plurality of fingerprint scanning lines and a plurality of fingerprint signal lines, wherein the fingerprint identification units complete fingerprint identification and detection work by supplying driving voltage signals to the fingerprint identification units through the fingerprint scanning lines and the fingerprint signal lines. Fingerprint identification unit and sub-pixel all are located the display area within range to be favorable to reducing the area of display panel frame, the design of the comprehensive screen of realization that can be better. The fingerprint identification unit of the invention provides a driving signal through the independent fingerprint identification driving circuit, the sub-pixel provides a scanning driving signal through the independent scanning driving circuit, the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line, and the scanning driving circuit is electrically connected with the scanning line, thereby avoiding the speed of fingerprint identification from being limited by the scanning speed of the scanning line, and being beneficial to improving the speed of fingerprint identification. In addition, the any-stage fingerprint identification driving unit can provide driving signals for at least two rows of fingerprint identification units at the same time, so that the at least two rows of fingerprint identification units perform fingerprint identification work at the same time, the fingerprint identification speed is further increased, the cost is not required to be increased, and the feasibility is high.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
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 plan view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of the display panel of FIG. 7;
FIG. 9 is an enlarged partial view of FIG. 8;
FIG. 10 is a schematic sectional view taken along line A-A' of FIG. 7;
fig. 11 is a schematic plan view of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic plan view of another display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
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.
Referring to fig. 1, fig. 1 is a schematic plan view illustrating a display panel 000 according to an embodiment of the present invention, where the display panel 000 of the embodiment includes: a display area AA and a non-display area NA;
the display area AA includes a plurality of sub-pixels 10 arranged in an array, a plurality of scan lines G extending along a first direction X, and a plurality of data lines S extending along a second direction Y; the display area AA further includes a plurality of fingerprint identification units 20 arranged in an array, a plurality of fingerprint scanning lines GL, and a plurality of fingerprint signal lines RL; wherein the first direction X intersects the second direction Y; optionally, the first direction X is perpendicular to the second direction Y;
the non-display area NA comprises a fingerprint identification driving circuit 30 and a scanning driving circuit 40, the fingerprint identification driving circuit 30 comprises a plurality of stages of mutually cascaded fingerprint identification driving units 301, the fingerprint identification driving circuit 30 is electrically connected with a fingerprint scanning line GL, and the scanning driving circuit 40 is electrically connected with a scanning line G;
any one of the fingerprint identification driving units 301 provides a driving signal to one group of fingerprint identification units 200, one group of fingerprint identification units 200 comprises at least two rows of fingerprint identification units 20, and any two of the fingerprint identification units 200 in the same group are respectively and electrically connected with different fingerprint signal lines RL.
Specifically, the display area AA of the display panel 000 provided in this embodiment includes a plurality of sub-pixels 10 arranged in an array for displaying, a plurality of scan lines G extending along the first direction X, and a plurality of data lines S extending along the second direction Y, and further includes a plurality of fingerprint identification units 20 arranged in an array for implementing fingerprint identification, a plurality of fingerprint scan lines GL, and a plurality of fingerprint signal lines RL, and the fingerprint identification units 20 complete fingerprint identification and detection operations by supplying driving voltage signals to the fingerprint identification units 20 through the fingerprint scan lines GL and the fingerprint signal lines RL. Fingerprint identification unit 20 and sub-pixel 10 all are located the display area AA within range to be favorable to reducing non-display area NA and be the area of display panel 000 frame, the design of the comprehensive screen of realization that can be better, avoid fingerprint identification unit 20 to occupy the too much space of non-display area NA. The working principle of the fingerprint identification unit 20 of the present embodiment is as follows: when a finger touches the display panel 000, the light source is reflected when it irradiates the valleys and ridges of the finger fingerprint, because the reflection angles of the valleys and ridges and the intensity of the reflected light are different, the light is projected onto the fingerprint identification unit 20, the fingerprint identification unit 20 transmits the received sensing signal to the fingerprint identification detection chip (not shown in the figure) through the fingerprint signal line RL, so that the fingerprint identification detection chip identifies the valleys and ridges of the fingerprint according to the received signal, thereby identifying the fingerprint, and the light source used at this time is generally the backlight source of the display panel.
The fingerprint identification unit 20 of this embodiment provides a driving signal through the independent fingerprint identification driving circuit 30, and the sub-pixel 10 provides a scanning driving signal through the independent scanning driving circuit 40, and the fingerprint identification driving circuit 30 is electrically connected with the fingerprint scanning line GL, and the scanning driving circuit 40 is electrically connected with the scanning line G, so that the speed of fingerprint identification can be prevented from being limited by the scanning speed of the scanning line, and the speed of fingerprint identification can be improved. Moreover, the fingerprint identification driving circuit 30 includes a plurality of stages of fingerprint identification driving units 301 that are cascaded to each other, and any stage of fingerprint identification driving unit 301 provides a driving signal to a group of fingerprint identification units 200, wherein a group of fingerprint identification units 200 includes at least two rows of fingerprint identification units 20, and any two of the same group of fingerprint identification units 200 are electrically connected to different fingerprint signal lines RL, that is, any stage of fingerprint identification driving unit 301 of this embodiment can provide a driving signal to at least two rows of fingerprint identification units 20 at the same time, so that at least two rows of fingerprint identification units 20 perform fingerprint identification work at the same time, which further improves the speed of fingerprint identification, does not need to increase the cost, and has high feasibility. The technical solution of this embodiment is also applicable to an HPPI (High Pixels Per inc) display panel, and since the number of sub-Pixels of the HPPI display panel is large, if the display and fingerprint identification driving circuits are driven by the same circuit, the charging time of the fingerprint identification unit 20 is further shortened, and in this embodiment, the fingerprint identification speed of the HPPI display panel can be further increased by driving the scanning driving signals for fingerprint identification and display by different driving circuits.
It should be noted that the fingerprint identification unit 20 of this embodiment adopts a photoelectric fingerprint identification technology, so that the fingerprint identification function of the display area of the display panel can be realized, the structure is simple, the implementation is easy, and the user experience is improved. The fingerprint identification units 20 of this embodiment may be located in the entire display area AA of the display panel 000 (as shown in fig. 1) for identifying the entire fingerprint of the display panel 000, or may be located only in a partial display area of the display panel 000 (for example, located only in the lower half screen or the upper half screen of the display panel, which is not shown in the figure) for identifying the local fingerprint of the display panel 000. The fingerprint identification driving unit 301 of any stage of the embodiment may provide driving signals to at least two rows of fingerprint identification units 20 at the same time, that is, at least two rows of fingerprint identification units 20 at the same time, but not limited to two rows, and may also provide driving signals to three, four or more rows of fingerprint identification units 20 at the same time, and in particular, the driving signals may be selected according to actual requirements. Fig. 1 of the present embodiment only schematically shows the layout positions of the scan driving circuit 40 and the fingerprint identification driving circuit 30 on the display panel 000, and may also be arranged in other layout manners, please refer to fig. 2, and fig. 2 is a schematic plan structure diagram of another display panel 000 provided in the embodiment of the present invention, but not limited to the above layout manners, and only needs to be located within the range of the non-display area NA.
It should be further noted that, in this embodiment, a driving manner of the scan driving circuit 40 is not specifically limited, please refer to fig. 1, fig. 2, fig. 3, and fig. 4, fig. 3 is a schematic plane structure diagram of another display panel 000 provided in an embodiment of the present invention, fig. 4 is a schematic plane structure diagram of another display panel 000 provided in an embodiment of the present invention, the scan driving circuit 40 may include a plurality of scan driving units 401 cascaded with each other, any one of the scan driving units 401 may simultaneously provide a scan signal to only one row of sub-pixels 10 (as shown in fig. 1), or simultaneously provide a scan signal to two or more rows of sub-pixels 10 (not shown in the figure), the scan driving circuit 40 may be electrically connected to only one end of a scan line G (as shown in fig. 1 and fig. 2), the scan driving circuit 40 may further include a first sub-driving circuit 4001 and a second sub-driving circuit 4002 respectively located at two ends of the scan line G, the same-stage scan driving unit 401 in the first sub-driving circuit 4001 and the second sub-driving circuit 4002 is electrically connected to two ends of the same scan line G (as shown in fig. 3), the scan driving circuit 40 may further include a first sub-driving circuit 4001 and a second sub-driving circuit 4002 respectively located at two ends of the scan line G, the first sub-driving circuit 4001 is electrically connected to the sub-pixels 10 in the odd-numbered rows, and the second sub-driving circuit 4002 is electrically connected to the sub-pixels 10 in the even-numbered rows (as shown in fig. 4).
In some optional embodiments, please refer to fig. 5, fig. 5 is a schematic plane structure diagram of another display panel 000 according to an embodiment of the present invention, in the present embodiment, the fingerprint scanning line GL includes a first segment GL01 extending along the first direction X, a second segment GL02 extending along the second direction Y, and a third segment GL03 extending along the first direction X, one end of the first segment GL01 is electrically connected to the fingerprint identification driving circuit 30, the other end of the first segment GL01 is electrically connected to the second segment GL02, and the second segment GL02 is electrically connected to the third segment GL 03; the same fingerprint scanning line GL is electrically connected to at least two rows of fingerprint identification units 20.
The present embodiment further explains an implementation manner in which any one stage of fingerprint identification driving unit 301 simultaneously provides driving signals to at least two rows of fingerprint identification units 20, and the one stage of fingerprint identification driving unit 301 simultaneously provides driving signals to at least two rows of fingerprint identification units 20 by dividing the fingerprint scanning line GL electrically connected to the one stage of fingerprint identification driving unit 301 into a three-segment structure including a first segment GL01 extending along the first direction X, a second segment GL02 extending along the second direction Y, and a third segment GL03 extending along the first direction X, so that the three segments of fingerprint scanning line are arranged around the two rows of fingerprint identification units 20 in a control manner.
It should be noted that fig. 5 of the present embodiment only schematically illustrates an implementation structure of any stage of the fingerprint identification driving unit 301 providing driving signals to two rows of fingerprint identification units 20 at the same time, when any stage of the fingerprint identification driving unit 301 provides driving signals to three rows of fingerprint identification units 20 at the same time, referring to fig. 6, fig. 6 is a schematic plane structure of another display panel 000 provided by the embodiment of the present invention, the fingerprint scanning line GL further includes a fourth segment GL04 extending along the second direction Y and a fifth segment GL05 extending along the first direction X, one end of the fourth segment GL04 is electrically connected to the third segment GL03, the other end is electrically connected to the fifth segment GL05, the same fingerprint scanning line GL is electrically connected to three rows of fingerprint identification units 20, one stage of the fingerprint identification driving unit 301 provides driving signals to three rows of fingerprint identification units 20 at the same time, so as to reduce the number of stages of the fingerprint identification driving unit 301 of the fingerprint identification driving circuit 30, the fingerprint identification speed of the display panel 000 can be further improved while the reduction of the frame is facilitated. At this time, any two of the fingerprint identification units 200 (three rows of fingerprint identification units 20) in the same group are electrically connected to different fingerprint signal lines RL, respectively (as shown in fig. 6). When the fingerprint recognition driving unit 301 of any one stage simultaneously supplies driving signals to more rows of fingerprint recognition units 20, the technical contents can be understood according to the description of the above-described embodiments.
In some optional embodiments, please refer to fig. 5 and fig. 6, in this embodiment, the at least two rows of fingerprint identification units 20 electrically connected to the same fingerprint scanning line GL are the nth row of fingerprint identification units 20(N) and the N +1 th row of fingerprint identification units 20(N + 1); wherein N is a positive integer greater than or equal to 1.
This embodiment further explains that when any stage of fingerprint identification driving unit 301 provides driving signals to two rows of fingerprint identification units 20 at the same time, and two rows of fingerprint identification units 20 are electrically connected with the same fingerprint scanning line GL, the two rows of fingerprint identification units 20 are along the second direction Y, the adjacent nth row of fingerprint identification units 20(N) and the N +1 th row of fingerprint identification units 20(N +1), thereby it can be realized that one stage of fingerprint identification driving unit 301 provides driving signals to two rows of fingerprint identification units 20 at the same time, and provide driving signals to two adjacent rows of fingerprint identification units 20 at the same time, it is favorable for each stage of fingerprint identification driving unit 301 to arrange along the second direction Y in proper order, and the line connection is more reasonable.
It should be noted that fig. 5 of the present embodiment illustrates that any stage of the fingerprint identification driving unit 301 simultaneously provides driving signals to two adjacent rows of fingerprint identification units 20, and fig. 6 illustrates that any stage of the fingerprint identification driving unit 301 simultaneously provides driving signals to three adjacent rows of fingerprint identification units 20 (nth row of fingerprint identification units 20(N), N +1 th row of fingerprint identification units 20(N +1), and N +2 th row of fingerprint identification units 20(N +2)), and when any stage of the fingerprint identification driving unit 301 simultaneously provides driving signals to more adjacent rows of fingerprint identification units 20, the technical content can be understood according to the description of the above embodiments.
In some optional embodiments, please refer to fig. 7, fig. 7 is a schematic plan view illustrating another display panel 000 according to an embodiment of the present invention, in which in this embodiment, at least two rows of fingerprint identification units electrically connected to the same fingerprint scanning line GL are an nth row of fingerprint identification units 20(N) and an N +2 th row of fingerprint identification units 20(N + 2); wherein N is a positive integer greater than or equal to 1.
The present embodiment further explains that when any one stage of fingerprint identification driving unit 301 provides driving signals to two rows of fingerprint identification units 20 at the same time, and two rows of fingerprint identification units 20 are electrically connected to the same fingerprint scanning line GL, the two rows of fingerprint identification units 20 are the nth row of fingerprint identification units 20(N) and the N +2 th row of fingerprint identification units 20(N +2) spaced by one row along the second direction Y, so that the one stage of fingerprint identification driving unit 301 can provide driving signals to two rows of fingerprint identification units 20 at the same time, which is beneficial to improving the fingerprint identification speed.
It should be noted that fig. 7 of this embodiment illustrates that any stage of the fingerprint identification driving unit 301 simultaneously provides driving signals to two non-adjacent rows of the fingerprint identification units 20, and when any stage of the fingerprint identification driving unit 301 simultaneously provides driving signals to three or more rows of the fingerprint identification units 20, any two rows of the three rows may be non-adjacent, other rows may be adjacent, or any two rows are adjacent, and other rows are non-adjacent, only the effect of increasing the fingerprint identification speed needs to be achieved, which is not described herein again.
In some alternative embodiments, please refer to fig. 8, 9 and 10, fig. 8 is a schematic structural diagram of the display panel of fig. 7, fig. 9 is a partial enlarged view of fig. 8, fig. 10 is a schematic sectional view taken along direction a-a' of fig. 7, in this embodiment, the display panel 000 at least includes a substrate base 01, an array layer 02, a first transparent conductive layer 03, and a second transparent conductive layer 04, an insulating layer 05 is disposed between the first transparent conductive layer 03 and the second transparent conductive layer 04, the array layer 02 is located on a side of the substrate base 01, the first transparent conductive layer 03 is located on a side of the array layer 02 away from the substrate base 01, and the second transparent conductive layer 04 is located on a side of the first transparent conductive layer 03 away from the substrate base 01;
the array layer 02 comprises a gate metal layer M1, a source/drain metal layer M2, a third metal layer M3 and an active layer 020, wherein the active layer 020 is located on one side of the substrate base plate 01, the gate metal layer M1 is located on one side of the active layer 020 away from the substrate base plate 01, the source/drain metal layer M2 is located on one side of the gate metal layer M1 away from the substrate base plate 01, and the third metal layer M3 is located on one side of the source/drain metal layer M2 away from the substrate base plate 01. The fingerprint identification unit 20 comprises a switch transistor T1 and a photodiode D which are electrically connected, wherein the switch transistor T1 comprises a grid T11, a source T12, a drain T13 and a silicon island T14, the grid T11 is electrically connected with a fingerprint scanning line GL, the source T12 is electrically connected with the cathode of the photodiode D, and the drain T13 is electrically connected with a fingerprint signal line RL; the gate T11 is positioned on the gate metal layer M1, the source T12 and the drain T13 are positioned on the source/drain metal layer M2, and the silicon island T14 is positioned on the active layer 020;
the second transparent conductive layer 04 is electrically connected to the third metal layer M3 through the first via 06, and the second transparent conductive layer 04 is electrically connected to the first transparent conductive layer 03 through the second via 07.
The present embodiment further explains that the fingerprint recognition unit 20 includes a switching transistor T1 and a photodiode D electrically connected, the switching transistor T1 includes a gate T11, a source T12, a drain T13, a silicon island T14, the gate T11 is electrically connected to the fingerprint scanning line GL, the source T12 is electrically connected to the cathode of the photodiode D, the drain T13 is electrically connected to the fingerprint signal line RL, the switching transistor T1 may be activated by the fingerprint recognition driving circuit 30 supplying an electric signal to the fingerprint scanning line GL, because the reflection angles of the valley line and the ridge line of the fingerprint and the intensity of the reflected light are different, the light is projected onto the photodiode D, the resistance value of the photodiode D is changed, and the current is changed, the current is transmitted to the fingerprint signal line RL through the switching transistor T in a conducting state, so that the fingerprint identification detection chip connected to the fingerprint signal line RL identifies valleys and ridges of a fingerprint. In this embodiment, the first transparent conductive layer 03 can be used as a common electrode, the second transparent conductive layer 04 can be used as a touch and display electrode, the second transparent conductive layer 04 is electrically connected to the third metal layer M3 through the first via hole 06, and the second transparent conductive layer 04 is electrically connected to the first transparent conductive layer 03 through the second via hole 07, so that the area of the transparent conductive layer can be increased, the electric field can be enhanced, and the control capability can be correspondingly enhanced.
In some optional embodiments, please refer to fig. 1 again, in this embodiment, the fingerprint scanning lines GL extend along the first direction X, the same row of fingerprint identification units 20 is electrically connected to the same fingerprint scanning line GL, and two electrically connected fingerprint scanning lines GL of two adjacent rows of fingerprint identification units 20 are shorted.
This embodiment further explains an embodiment in which any one stage of fingerprint identification driving unit 301 provides driving signals to at least two rows of fingerprint identification units 20 simultaneously, the same row of fingerprint identification units 20 may be electrically connected to the same fingerprint scanning line GL, two adjacent fingerprint scanning lines GL electrically connected to two rows of fingerprint identification units 20 are shorted, the fingerprint scanning lines GL extend along the first direction X, that is, the nth row of fingerprint identification units 20(N) is electrically connected to the nth fingerprint scanning line GL (N), the (N +1) th row of fingerprint identification units 20(N +1) is electrically connected to the (N +1) th fingerprint scanning line GL (N +1), the nth fingerprint scanning line GL (N) is shorted to the (N +1) th fingerprint scanning line GL (N +1) and then the same stage of fingerprint identification driving unit 301 is used to provide driving signals, so that the one stage of fingerprint identification driving unit 301 can provide driving signals to two rows of fingerprint identification units 20 simultaneously, when promoting fingerprint identification's speed, can also reduce wire-wound quantity in the non-display area NA to be favorable to the realization of narrow frame.
It should be noted that fig. 1 of the present embodiment only schematically illustrates an implementation structure diagram of any stage of the fingerprint identification driving unit 301 providing driving signals to two rows of fingerprint identification units 20, when any stage of the fingerprint identification driving unit 301 provides driving signals to three rows of fingerprint identification units 20, please refer to fig. 11, fig. 11 is a schematic plane structure diagram of another display panel 000 according to the present embodiment of the present invention, three fingerprint scanning lines GL electrically connected to adjacent three rows of fingerprint identification units 20 are shorted, the fingerprint scanning lines GL all extend along the first direction X, that is, the nth row of fingerprint identification unit 20(N) is electrically connected to the nth fingerprint scanning line GL (N), (N +1) is electrically connected to the N +1 th fingerprint scanning line GL (N +1), the N +2 th row of fingerprint identification unit 20(N +2) is electrically connected to the N +2 th fingerprint scanning line GL (N +2), the same level of fingerprint identification driving unit 301 is used to provide driving signals after the short circuit of the nth fingerprint scanning line GL (N), the (N +1) th fingerprint scanning line GL (N +1) and the (N +2) th fingerprint scanning line GL (N +2), so as to further improve the speed of fingerprint identification. At this time, any two of the fingerprint identification units 200 (three rows of fingerprint identification units 20) in the same group are electrically connected to different fingerprint signal lines RL, respectively (as shown in fig. 11). When the fingerprint recognition driving unit 301 of any one stage simultaneously supplies driving signals to more rows of fingerprint recognition units 20, the technical contents can be understood according to the description of the above-described embodiments.
In some optional embodiments, please refer to fig. 12, fig. 12 is a schematic plan view of another display panel 000 according to an embodiment of the present invention, in the present embodiment, the fingerprint scanning lines GL extend along the first direction X, the same row of fingerprint identification units 20 are electrically connected to the same fingerprint scanning line GL, the electrically connected fingerprint scanning line GL (M) of the mth row of fingerprint identification units 20(M) is shorted with the electrically connected fingerprint scanning line GL (M +2) of the M +2 th row of fingerprint identification units 20(M + 2); wherein M is a positive integer greater than or equal to 1.
This embodiment further explains that when any one stage of the fingerprint identification driving units 301 simultaneously provides driving signals to two rows of fingerprint identification units 20, and the same row of fingerprint identification units 20 is electrically connected to the same fingerprint scanning line GL, the two rows of fingerprint identification units 20 are the M-th row of fingerprint identification units 20(M) and the M + 2-th row of fingerprint identification units 20(M +2) which are spaced by one row along the second direction Y, the same-stage fingerprint identification driving unit 301 is used to provide driving signals after the electrically connected fingerprint scanning lines GL (M) of the mth row of fingerprint identification units 20(M) are short-circuited with the electrically connected fingerprint scanning lines GL (M +2) of the M +2 th row of fingerprint identification units 20(M +2), therefore, the first-level fingerprint identification driving unit 301 can provide driving signals for the two rows of fingerprint identification units 20 at the same time, and fingerprint identification speed can be improved.
It should be noted that fig. 12 of this embodiment illustrates that any stage of the fingerprint identification driving unit 301 simultaneously provides driving signals to two non-adjacent rows of the fingerprint identification units 20, and when any stage of the fingerprint identification driving unit 301 simultaneously provides driving signals to three or more rows of the fingerprint identification units 20, any two rows of the three rows may be non-adjacent, other rows may be adjacent, or any two rows are adjacent, and other rows are non-adjacent, only the effect of increasing the fingerprint identification speed needs to be achieved, which is not described herein again.
In some alternative embodiments, with continued reference to fig. 1, the display panel 000 includes a plurality of pixel units 00 arranged in an array, each pixel unit 00 includes a plurality of sub-pixels 10 and at least one fingerprint identification unit 20, and the scanning lines G and the data lines S are crossed and insulated to define an area where the plurality of sub-pixels 10 are located.
The embodiment further defines that the plurality of sub-pixels 10 and the at least one fingerprint identification unit 20 form one pixel unit 00 of the display panel 000, the plurality of sub-pixels 10 in the pixel unit 00 may be red sub-pixels, green sub-pixels, blue sub-pixels, and may further include white sub-pixels, and the sub-pixels 10 and the at least one fingerprint identification unit 20 of the embodiment are all located within the display area AA of the display panel 000, so that the fingerprint identification unit 20 may be prevented from occupying too much space of the non-display area NA, which is beneficial to reducing the area of the border of the display panel 000, and may better implement a full-screen design.
In some optional embodiments, please continue to refer to fig. 1, in the present embodiment, the plurality of fingerprint identification units 20 are sequentially arranged along the second direction Y to form a row of fingerprint identification units.
A plurality of fingerprint identification unit 20 of this embodiment arranges in proper order in second direction Y and forms a fingerprint identification unit to can be favorable to laying of fingerprint signal line RL, avoid fingerprint signal line RL to appear buckling and influence the transmission of fingerprint signal, be favorable to improving fingerprint identification speed and identification accuracy.
In some optional embodiments, referring to fig. 1, in the present embodiment, the fingerprint identification driving circuit 30 and the scan driving circuit 40 are located at two sides of the display area AA along the first direction X in the non-display area NA.
In the embodiment, the fingerprint identification driving circuit 30 and the scanning driving circuit 40 are located on two sides of the display area AA along the first direction X in the non-display area NA, so that the area distribution of the non-display area NA on two sides of the display area AA is uniform, the fingerprint identification driving signal and the display driving signal are transmitted from two sides which are different relatively, the interference between signals is avoided, and the product yield is improved.
In some alternative embodiments, please refer to fig. 13, where fig. 13 is a schematic structural diagram of a display device 111 according to an embodiment of the present invention, and the display device 111 according to the embodiment includes the display panel 000 according to the above embodiment of the present invention. The embodiment of fig. 13 is only an example of a mobile phone, and the display device 111 is described, it is understood that the display device 111 provided in the embodiment of the present invention may be another display device 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display panel 000 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 000 in the above embodiments, which is not described herein again.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
the display panel provided by the invention comprises a plurality of sub-pixels which are used for displaying and are arranged in an array mode, a plurality of scanning lines which extend along a first direction, a plurality of data lines which extend along a second direction, a plurality of fingerprint identification units which are used for realizing fingerprint identification and are arranged in an array mode, a plurality of fingerprint scanning lines and a plurality of fingerprint signal lines, wherein the fingerprint identification units complete fingerprint identification and detection work by supplying driving voltage signals to the fingerprint identification units through the fingerprint scanning lines and the fingerprint signal lines. Fingerprint identification unit and sub-pixel all are located the display area within range to be favorable to reducing the area of display panel frame, the design of the comprehensive screen of realization that can be better. The fingerprint identification unit of the invention provides a driving signal through the independent fingerprint identification driving circuit, the sub-pixel provides a scanning driving signal through the independent scanning driving circuit, the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line, and the scanning driving circuit is electrically connected with the scanning line, thereby avoiding the speed of fingerprint identification from being limited by the scanning speed of the scanning line, and being beneficial to improving the speed of fingerprint identification. In addition, the any-stage fingerprint identification driving unit can provide driving signals for at least two rows of fingerprint identification units at the same time, so that the at least two rows of fingerprint identification units perform fingerprint identification work at the same time, the fingerprint identification speed is further increased, the cost is not required to be increased, and the feasibility is high.
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 (10)
1. A display panel, comprising: a display area and a non-display area;
the display area comprises a plurality of sub-pixels arranged in an array mode, a plurality of scanning lines extending along a first direction, and a plurality of data lines extending along a second direction; the display area also comprises a plurality of fingerprint identification units arranged in an array manner, a plurality of fingerprint scanning lines and a plurality of fingerprint signal lines; the fingerprint identification units are sequentially arranged along the first direction to form a fingerprint identification unit row, and the fingerprint identification unit rows are sequentially arranged along the second direction; wherein the first direction intersects the second direction;
the non-display area comprises a fingerprint identification driving circuit and a scanning driving circuit, the fingerprint identification driving circuit comprises a plurality of stages of fingerprint identification driving units which are mutually cascaded, the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line, and the scanning driving circuit is electrically connected with the scanning line;
any one stage of the fingerprint identification driving units provides driving signals for a group of fingerprint identification units, the group of fingerprint identification units comprises at least two rows of fingerprint identification units, and any two of the fingerprint identification units in the same group are respectively and electrically connected with different fingerprint signal lines; the number of the fingerprint identification driving units in the fingerprint identification driving circuit is less than the number of the rows of the fingerprint identification units in the display panel;
the display panel comprises a plurality of pixel units arranged in an array mode, each pixel unit comprises a plurality of sub-pixels and at least one fingerprint identification unit which are sequentially arranged along the first direction, and the scanning lines and the data lines are crossed and insulated to limit the area where the sub-pixels are located.
2. The display panel according to claim 1, wherein the fingerprint scanning line includes a first segment extending along the first direction, a second segment extending along the second direction, and a third segment extending along the first direction, one end of the first segment is electrically connected to the fingerprint identification driving circuit, the other end of the first segment is electrically connected to the second segment, and the second segment is electrically connected to the third segment; the same fingerprint scanning line is electrically connected with at least two rows of fingerprint identification units.
3. The display panel according to claim 2, wherein the at least two rows of fingerprint identification units electrically connected to the same fingerprint scanning line are the nth row of fingerprint identification units and the N +1 th row of fingerprint identification units; wherein N is a positive integer greater than or equal to 1.
4. The display panel according to claim 2, wherein the at least two rows of fingerprint identification units electrically connected to the same fingerprint scanning line are the nth row of fingerprint identification units and the N +2 th row of fingerprint identification units; wherein N is a positive integer greater than or equal to 1.
5. The display panel according to claim 4,
the display panel at least comprises a substrate, an array layer, a first transparent conducting layer and a second transparent conducting layer, wherein an insulating layer is arranged between the first transparent conducting layer and the second transparent conducting layer, the array layer is positioned on one side of the substrate, the first transparent conducting layer is positioned on one side of the array layer, which is far away from the substrate, and the second transparent conducting layer is positioned on one side of the first transparent conducting layer, which is far away from the substrate;
the array layer comprises a grid metal layer, a source/drain metal layer, a third metal layer and an active layer, the fingerprint identification unit comprises a switch transistor and a photodiode which are electrically connected, the switch transistor comprises a grid, a source, a drain and a silicon island, the grid is electrically connected with the fingerprint scanning line, the source is electrically connected with the cathode of the photodiode, and the drain is electrically connected with the fingerprint signal line; the grid electrode is positioned on the grid metal layer, the source electrode and the drain electrode are positioned on the source/drain metal layer, and the silicon island is positioned on the active layer;
the second transparent conducting layer is electrically connected with the third metal layer through a first through hole, and the second transparent conducting layer is electrically connected with the first transparent conducting layer through a second through hole.
6. The display panel according to claim 1, wherein the fingerprint scanning lines extend along the first direction, the fingerprint identification units in the same row are electrically connected with the same fingerprint scanning line, and two fingerprint scanning lines electrically connected with the fingerprint identification units in two adjacent rows are in short circuit.
7. The display panel according to claim 1, wherein the fingerprint scanning lines extend along the first direction, the fingerprint identification units in the same row are electrically connected to the same fingerprint scanning line, and the fingerprint scanning line electrically connected to the fingerprint identification unit in the M-th row is shorted with the fingerprint scanning line electrically connected to the fingerprint identification unit in the M + 2-th row; wherein M is a positive integer greater than or equal to 1.
8. The display panel according to claim 1, wherein the fingerprint identification units are arranged in sequence along the second direction to form a column of fingerprint identification units.
9. The display panel according to claim 1,
in the non-display area, along the first direction, the fingerprint identification driving circuit and the scanning driving circuit are located on two sides of the display area.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN110427874B (en) * | 2019-07-31 | 2021-12-24 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN110796124B (en) * | 2019-11-27 | 2022-07-01 | 厦门天马微电子有限公司 | Display panel driving method and display device |
| CN110825269B (en) * | 2019-11-29 | 2024-04-02 | 上海中航光电子有限公司 | Display panel, driving method thereof and display device |
| CN110867165B (en) * | 2019-11-29 | 2021-10-15 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110955077B (en) * | 2019-12-30 | 2023-01-06 | 厦门天马微电子有限公司 | Display panel and display device |
| CN111160287B (en) * | 2019-12-31 | 2022-10-21 | 厦门天马微电子有限公司 | Display panel, fingerprint identification method thereof and display device |
| TWI727598B (en) * | 2020-01-06 | 2021-05-11 | 友達光電股份有限公司 | Display device |
| CN111695547B (en) * | 2020-06-30 | 2022-08-30 | 厦门天马微电子有限公司 | Display panel and display device |
| CN111768744B (en) * | 2020-07-30 | 2022-12-02 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN112133258B (en) | 2020-09-28 | 2022-06-17 | 厦门天马微电子有限公司 | Display panel and driving method thereof |
| CN112560798B (en) * | 2020-12-30 | 2022-10-11 | 厦门天马微电子有限公司 | Display panel, fingerprint identification driving method thereof and display device |
| CN113011353B (en) * | 2021-03-25 | 2022-10-11 | 厦门天马微电子有限公司 | Display panel and display device |
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| TWI389016B (en) * | 2008-08-26 | 2013-03-11 | Acer Inc | Integrated pixel structure, integrated touch panel lcd device and method of controlling the same |
| CN104849890B (en) * | 2015-05-26 | 2018-01-12 | 武汉华星光电技术有限公司 | A kind of liquid crystal display panel, display device and its driving method |
| CN106292112A (en) * | 2016-10-31 | 2017-01-04 | 武汉华星光电技术有限公司 | Display panels and there is the display device of display panels |
| CN107656661A (en) * | 2017-09-26 | 2018-02-02 | 武汉华星光电技术有限公司 | Mutual capacitance touch display panel with fingerprint and liquid crystal display |
| CN109376715B (en) * | 2018-12-13 | 2020-11-20 | 厦门天马微电子有限公司 | Array substrate and display panel |
| CN109389933B (en) * | 2018-12-20 | 2021-09-17 | 厦门天马微电子有限公司 | Driving method of fingerprint identification module and display device |
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