CN109358706B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109358706B CN109358706B CN201811277633.1A CN201811277633A CN109358706B CN 109358706 B CN109358706 B CN 109358706B CN 201811277633 A CN201811277633 A CN 201811277633A CN 109358706 B CN109358706 B CN 109358706B
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- display panel
- control line
- fingerprint identification
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
- G06F1/1694—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being a single or a set of motion sensors for pointer control or gesture input obtained by sensing movements of the portable computer
Abstract
The invention discloses a display panel and a display device, which belong to the technical field of display and comprise: a display area and a non-display area surrounding the display area; the display panel comprises a plurality of fingerprint identification modules, and each fingerprint identification module comprises a fingerprint identification unit, a signal switching unit and a signal routing; the fingerprint identification unit is positioned in the display area; the signal switching unit comprises a first input end, a first output end and a second output end; the first input end is electrically connected with the signal wiring, the first output end is electrically connected with the fingerprint identification unit, and the second output end is electrically connected with the conductive electrode; in the fingerprint identification stage, the first input end and the first output end are conducted, and the first input end and the second output end are insulated; in the display stage, the first input terminal and the first output terminal are insulated, and the first input terminal and the second output terminal are conducted. Compared with the prior art, the display panel is beneficial to realizing a full-screen and lightening and thinning of the display panel.
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
In a display device provided in the prior art, a fingerprint recognition function is integrated. When the user uses the display device, the fingerprint recognition function may be used to cause the display device to perform a specific function. The fingerprint identification function is convenient, fast and high in safety, and is one of important research and development directions of the display device.
Among the prior art, two kinds of modes that set up the fingerprint identification module are provided.
In a mode, place the fingerprint identification module in the below of display screen, can occupy the more space of display device like this, be unfavorable for improving the screen and account for the ratio, be unfavorable for the display effect of full screen.
In another mode, set up the fingerprint identification module at display device's the back (be promptly for the one side with the relative setting of display screen), can increase display device's thickness like this, be unfavorable for display device's frivolousization, reduced user's use and experienced.
In addition, in the above two modes, a fingerprint chip needs to be additionally arranged in the display device to process the signal of the fingerprint identification module, thereby further increasing the cost of the display device.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device to solve the problems in the prior art.
The present invention provides a display panel, comprising: a display area and a non-display area surrounding the display area; the display panel comprises a plurality of fingerprint identification modules, and each fingerprint identification module comprises a fingerprint identification unit, a signal switching unit and a signal routing; the fingerprint identification unit is positioned in the display area; the signal switching unit comprises a first input end, a first output end and a second output end; the first input end is electrically connected with the signal wiring, the first output end is electrically connected with the fingerprint identification unit, and the second output end is electrically connected with the conductive electrode; in the fingerprint identification stage, the first input end and the first output end are conducted, and the first input end and the second output end are insulated; in the display stage, the first input terminal and the first output terminal are insulated, and the first input terminal and the second output terminal are conducted.
The invention also provides a display device which comprises the display panel provided by the invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
1. the fingerprint identification unit is arranged in the display area and can be manufactured and formed in the process of manufacturing the display panel. Compared with the prior art, the fingerprint identification module does not need to be additionally manufactured, so that the manufacturing process and cost can be saved, and the display device is light and thin.
2. The fingerprint identification unit is arranged in the display area, does not occupy the space of the non-display area, and therefore is beneficial to narrowing the frame of the display panel, improving the screen occupation ratio and realizing the display effect of the full screen.
3. The fingerprint identification module can transmit electric signals by multiplexing existing signal wires in the display panel, the signal wires not only can transmit the electric signals for the conductive electrodes to realize a display function, but also can transmit the electric signals for the fingerprint identification unit to realize a fingerprint identification function, and therefore the wire routing structure of the display panel can be simplified; moreover, the chip for processing the signal wiring can be multiplexed and used for processing the electric signal of the fingerprint identification module, and compared with the prior art, the cost of the display panel can be reduced without adding an additional fingerprint identification chip.
Of course, it is not necessary for any product in which the present invention is practiced to 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 structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a fingerprint identification module according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another fingerprint identification module provided in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another fingerprint identification module according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another fingerprint identification module according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another fingerprint identification module according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another fingerprint identification module according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 12 is a schematic structural diagram 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 and fig. 2, the present embodiment provides a display panel, including:
a display area AA and a non-display area NA surrounding the display area AA;
the display panel comprises a plurality of fingerprint identification modules 10, wherein each fingerprint identification module 10 comprises a fingerprint identification unit 11, a signal switching unit 12 and a signal routing 13; the fingerprint identification unit 11 is located in the display area AA;
the signal switching unit 12 includes a first input terminal I1, a first output terminal O1, and a second output terminal O2; the first input end I1 is electrically connected with the signal trace 13, the first output end O1 is electrically connected with the fingerprint identification unit 11, and the second output end O2 is electrically connected with the conductive electrode 20;
in the fingerprint recognition stage, please refer to fig. 3 in combination, the first input terminal I1 and the first output terminal O1 are turned on, and the first input terminal I1 and the second output terminal O2 are insulated; fig. 3 illustrates an equivalent circuit diagram of the signal switching unit 12 during the fingerprint recognition phase;
in the display phase, please refer to fig. 4 in combination, the first input terminal I1 is isolated from the first output terminal O1, and the first input terminal I1 and the second output terminal O2 are turned on. Fig. 4 illustrates an equivalent circuit diagram of the signal switching unit 12 in the display stage.
The display panel provided by the embodiment has a fingerprint identification function. Specifically, the display area AA is used for displaying image information, and a plurality of pixels (not shown in the figure) may be included in the display area AA; the non-display area NA does not have a display function, and is used for disposing the wirings and the electronic elements.
The fingerprint identification module 10 has a function of identifying fingerprint information, and specifically, the fingerprint identification module 10 includes a fingerprint identification unit 11, and the fingerprint identification unit 11 can convert a fingerprint signal into an electrical signal. The fingerprint recognition unit 11 is disposed in the display area AA, and may be formed in a process of manufacturing the display panel.
The signal switching unit 12 includes an input terminal and two output terminals, and can time-divisionally output the electrical signal of the first input terminal I1. The first input terminal I1 is electrically connected to the signal trace 13, and the signal trace 13 transmits electrical signals to the first input terminal I1. Specifically, at different stages of the display panel, the signal switching unit 12 may control the electrical signal of the signal trace 13 to be output from the first output terminal O1, or control the electrical signal of the signal trace 13 to be output from the second output terminal O2.
In the fingerprint identification stage, the signal routing 13 transmits a fingerprint identification signal to the fingerprint identification unit 11 so as to enable the display panel to perform fingerprint identification; at this time, the first input terminal I1 and the first output terminal O1 are turned on, and the first input terminal I1 and the second output terminal O2 are insulated.
In the display stage, the signal wiring 13 transmits a display signal to the conductive electrode 20, so that the display panel realizes the display function; at this time, the first input terminal I1 and the first output terminal O1 are insulated, and the first input terminal I1 and the second output terminal O2 are turned on.
It should be noted that, within a frame time, the fingerprint identification phase and the display phase may be repeated alternately for multiple times, and the specific number of times of repetition needs to be set according to the actual performance requirement of the display panel, which is not limited in this embodiment.
In addition, in the present embodiment, only a partial area of the display area AA is provided with the fingerprint identification unit 11 for an example, and the specific position of the fingerprint identification unit 11 in the display area AA is not particularly limited in the embodiment of the present invention. The display panel can be full screen identification, namely the fingerprint identification units are uniformly distributed in the display area AA; the display panel may also be a partial fingerprint identification area, that is, the fingerprint identification units are only distributed in a part of the fingerprint identification area AA. The embodiments of the present invention are not particularly limited thereto.
The display panel provided by the embodiment at least has the following beneficial effects:
1. the fingerprint recognition unit 11 is disposed in the display area AA, and may be formed in a process of manufacturing the display panel. Compared with the prior art, the fingerprint identification module does not need to be additionally manufactured, so that the manufacturing process and cost can be saved, and the display device is light and thin.
2. The fingerprint identification unit 11 is arranged in the display area AA, does not occupy the space of the non-display area NA, and therefore is beneficial to narrowing the frame of the display panel, improving the screen occupation ratio and realizing the display effect of the full screen.
3. The fingerprint identification module 10 can transmit an electrical signal by multiplexing the existing signal routing 13 in the display panel, and the signal routing 13 not only can transmit the electrical signal for the conductive electrode 20 to realize a display function, but also can transmit the electrical signal for the fingerprint identification unit 11 to realize a fingerprint identification function, so that the routing structure of the display panel can be simplified; moreover, the chip for processing the signal trace 13 can be multiplexed to process the electrical signal of the fingerprint identification module 10, and compared with the prior art, the cost of the display panel can be reduced without adding an additional fingerprint identification chip.
It should be noted that the signal traces 13 and the conductive electrodes 20 can be multiplexed with the existing structure in the display panel.
Specifically, in some alternative embodiments, with continued reference to fig. 1, the display area AA includes a plurality of common electrode blocks, which are multiplexed into the conductive electrode 20. In the display stage, the common electrode block is used for receiving a common voltage signal transmitted by the signal trace 13, and the signal trace 13 may be a common electrode line. The display panel may further include a pixel electrode (not shown), and a voltage difference is formed between the common electrode and the pixel electrode, which may be used to implement a display function. Optionally, the display panel provided in this embodiment is a liquid crystal display panel. In the display stage of the display panel, the voltage difference between the common electrode and the pixel electrode is used for controlling the deflection of liquid crystal molecules, so that the brightness of the pixel is controlled, and the display function is realized.
In the display panel provided by this embodiment, the multiplexing common electrode line is used as a signal trace to transmit a fingerprint identification signal for the fingerprint identification module 10, so that an excessive signal line can be prevented from being added in the display panel, and the influence on the aperture ratio of the display panel is reduced.
Optionally, the conductive electrode 20 is reused as a touch electrode, and the signal trace 13 is reused as a touch trace. In this embodiment, the common electrode block is reused as a touch electrode, so that the display panel can realize a function of recognizing touch position information. Specifically, in the touch recognition stage of the display panel, when the display panel performs a touch operation, the touch electrode corresponding to the touch operation position can be determined by detecting a change in the electrical signal of the plurality of touch electrodes, so as to determine the position information of the touch operation.
In the display panel that this embodiment provided, the multiplexing touch-control electrode is electrically conductive electrode, and multiplexing touch-control is walked as signal and is walked line 13, can make display panel further realize the touch-control function, richenes display panel's performance, promotes user experience.
In other alternative embodiments, referring to fig. 5, the conductive electrodes 20 are multiplexed as pixel electrodes, and the signal traces 13 are multiplexed as data lines. In the display panel provided in this embodiment, in the display stage, the pixel electrode is used for receiving the pixel voltage signal transmitted by the signal trace 13, and the signal trace 13 may be a data line. The display panel may further include a common electrode (not shown), and a voltage difference is formed between the common electrode and the pixel electrode, which may be used to implement a display function. Optionally, the display panel provided in this embodiment is a liquid crystal display panel. In the display stage of the display panel, the voltage difference between the common electrode and the pixel electrode is used for controlling the deflection of liquid crystal molecules, so that the brightness of the pixel is controlled, and the display function is realized.
It should be noted that the signal traces 13 and the conductive electrodes 20 can be multiplexed with the existing structure in the display panel, and fig. 1 and fig. 5 are only exemplary illustrations. In some optional implementation manners of the present invention, the signal trace 13 and the conductive electrode 20 may be multiplexed with other structures in the display panel, and a detailed description of the embodiment of the present invention is omitted here.
In the following, the present invention is exemplified herein with respect to a specific structure of the fingerprint recognition module.
In some alternative embodiments, referring to fig. 6, in the present embodiment, the fingerprint identification module 10 includes a fingerprint control line 14;
the fingerprint recognition unit 11 includes: a first switch 111 and a photodiode 112; the grid of the first switch 111 is electrically connected with the fingerprint control line 14, and the first pole of the first switch 111 is electrically connected with the photodiode 112; the second pole of the first switch 111 is electrically connected to the first output terminal O1.
In the display panel provided in this embodiment, only the first switch 111 is taken as an N-type thin film transistor for illustration, and optionally, the first switch 111 may be another type of switch, for example, a P-type thin film transistor, which is not limited in this embodiment. In this embodiment, the fingerprint control line 14 is used to control the on or off of the first switch 111. When the first switch 111 is an N-type thin film transistor and the electrical signal of the fingerprint control line 14 is a high level signal, the first switch 111 is turned on; when the electrical signal of the fingerprint control line 14 is a low level signal, the first switch 111 is turned off.
The photodiode 112 may convert the optical signal into an electrical signal. A photodiode, also called a photodiode (photodiode), is a light detector capable of converting light into a current or voltage signal. The photodiode usually uses a PN junction with photosensitive characteristics, is very sensitive to light changes, has unidirectional conductivity, and changes electrical characteristics when light intensity is different, so that the current in a circuit can be changed by using the intensity of illumination.
When the first switch 111 is turned on, the fingerprint identification signal output by the first output terminal O1 can be transmitted to the photodiode 112, the photodiode 112 performs fingerprint identification, and transmits the electrical signal to the signal trace 13 through the first output terminal O1, and by analyzing the variation of the electrical signal of each signal trace 13, the fingerprint identification condition of each photodiode 112 can be known, and fingerprint information can be obtained.
In the display panel provided by the embodiment, the photosensitive diode is used for detecting fingerprint information, and the photodiode is simple in structure, low in manufacturing process difficulty, small in size and convenient to integrate in the display area of the display panel.
In some optional embodiments, referring to fig. 7, in the present embodiment, the signal switching unit 12 includes: a second switch 121 and a third switch 122; wherein the content of the first and second substances,
the gate of the second switch 121 is electrically connected to the first control line 30, the first pole of the second switch 121 is electrically connected to the first output terminal O1, and the second pole of the second switch 121 is electrically connected to the first input terminal I1;
the gate of the third switch 122 is electrically connected to the second control line 31, the first pole of the third switch 122 is electrically connected to the second output terminal O2, and the second pole of the third switch 122 is electrically connected to the first input terminal I1.
In this embodiment, the signal switching unit 12 is provided with two switches, namely a second switch 121 and a third switch 122; the two switches are used for controlling the electric signal of the first input terminal I1 to be outputted from the first output terminal O1 and the second output terminal O2 in time sharing at different stages of the display panel.
Specifically, when the second switch 121 is turned on, the electrical signal of the first input terminal I1 is output from the first output terminal O1 to provide the electrical signal to the fingerprint recognition unit 11. When the third switch 122 is turned on, the electrical signal at the first input terminal I1 is output from the second output terminal O2 to provide the electrical signal to the conductive electrode 20.
In the display panel provided by this embodiment, two switches are disposed in the signal switching unit 12, and the electrical signal of the first input terminal I1 can be controlled to be output from any one of the first output terminal O1 and the second output terminal O2 at different stages of the display panel, so that the signal routing 13 can be multiplexed, and the electrical signal is transmitted for different structures at different stages of the display panel, thereby simplifying the routing arrangement of the display panel.
In some alternative embodiments, referring to fig. 8 and 9, in the present embodiment, the non-display area NA includes a bonding area BO, and the bonding area BO includes a plurality of conductive pads 33;
the first control line 30 is electrically connected to the conductive pad 33, and the second control line 31 is electrically connected to the conductive pad 33.
In this embodiment, the bonding area BO may be used to bond a chip or a flexible printed circuit, and the chip or the flexible printed circuit may be electrically connected to the conductive pad 33 through a conductive adhesive.
The conductive pad 33 may provide an electrical signal to the first and second control lines 30 and 31 to control the on or off state of the second and third switches 121 and 122.
Optionally, with continued reference to fig. 8 and fig. 9, one of the second switch 121 and the third switch 122 is a P-type thin film transistor, and the other is an N-type thin film transistor;
the first control line 30 and the second control line 31 are electrically connected to the same conductive pad 33.
In this embodiment, only the second switch 121 is a P-type thin film transistor, and the third switch 122 is an N-type thin film transistor. In other alternative implementations of the present invention, the second switch 121 may be an N-type thin film transistor, and the third switch 122 may be a P-type thin film transistor.
Since one of the second switch 121 and the third switch 122 is a P-type thin film transistor and the other is an N-type thin film transistor, the conducting signals of the two are opposite, the P-type thin film transistor is conducted under the control of a low potential, and the N-type thin film transistor is conducted under the control of a high potential. Therefore, the first control line 30 and the second control line 31 can be electrically connected to the same conductive pad 33, and the electrical signal of only one conductive pad 33 can control one of the second switch 121 and the third switch 122 to be turned on and the other to be turned off, thereby realizing the function of time-sharing outputting of the electrical signal by the signal switching unit 12.
In this embodiment, the number of the conductive pads 33 can be effectively reduced, the structure of the bonding area BO is simplified, and the narrow frame of the display panel is facilitated.
In some alternative embodiments, please refer to fig. 9 and fig. 10 in combination, in this embodiment, the non-display area NA includes a driving circuit 40, the driving circuit 40 includes a plurality of shift registers 41, and the driving circuit 40 is electrically connected to the fingerprint control line 14;
during the fingerprint identification phase, the drive circuit 40 transmits a drive signal to the fingerprint control line 14.
In this embodiment, the driving circuit 40 is used to drive the fingerprint control line 14. Alternatively, the fingerprint identification units 11 in the same row are electrically connected to the same fingerprint control line 14. The fingerprint control line 14 controls the first switches 111 of one row to be turned on or off at the same time.
The driving circuit 40 includes a plurality of shift registers 41, the plurality of shift registers generate driving signals one by one, the plurality of driving signals are used for controlling the first switch 111 to be turned on row by row, and the fingerprint identification module 10 performs fingerprint identification row by row. Optionally, in this embodiment, the driving signal is a high level signal.
In this embodiment, the driving circuit 40 is disposed in the non-display area NA, and the driving circuit 40 can generate a driving signal to drive the fingerprint identification unit 11 in the fingerprint identification module 10 to perform fingerprint identification.
In fig. 10, the driving mode of the fingerprint control line 14 by the driving circuit 40 is described as the double-edge driving, and specifically, both end portions of the fingerprint control line 14 are electrically connected to the shift register 41. It is understood that in other alternative implementations of the present invention, only one end of the fingerprint control line 14 may be electrically connected to the shift register 41, and the driving mode of the driving circuit 40 is not particularly limited by the embodiment of the present invention.
In some alternative embodiments, please refer to fig. 9 and fig. 11 in combination, in the present embodiment, the display area AA includes a plurality of gate lines GL;
the non-display area NA includes a gate driving circuit 50, and the gate driving circuit 50 is electrically connected to the plurality of gate lines GL;
the gate driving circuit 50 includes a plurality of first shift registers 51;
the first shift register 51 is electrically connected to the fingerprint control line 14.
In the display panel provided in this embodiment, the gate driving circuit 50 is configured to provide gate driving signals to the gate lines GL, and provide the gate driving signals to the gate lines line by line. In this embodiment, the gate driving circuit is multiplexed to provide a driving signal for the fingerprint control line 14.
Alternatively, the fingerprint identification units 11 in the same row are electrically connected to the same fingerprint control line 14. The fingerprint control line 14 controls the first switches 111 of one row to be turned on or off at the same time. The driving circuit 50 includes a plurality of first shift registers 51, which generate driving signals one by one, the driving signals are used to control the first switches 111 to be turned on row by row, and the fingerprint identification module 10 performs fingerprint identification row by row. Optionally, in this embodiment, the driving signal is a high level signal.
In this embodiment, the gate driving circuit 50 may provide signals for the gate lines GL and also provide electrical signals for the fingerprint control lines 14, so as to simplify the circuit structure of the non-display area NA, which is beneficial to simplifying the design of the display panel and realizing a narrow frame.
In fig. 11, only the case where the gate driving circuit 50 drives the fingerprint control line 14 in a one-sided driving mode is described, and specifically, only one end of the fingerprint control line 14 is electrically connected to the first shift register 51. It is understood that, in other alternative implementations of the present invention, two end portions of the fingerprint control line 14 may be electrically connected to the first shift register 51, and the driving mode of the gate driving circuit 50 is not particularly limited in the embodiment of the present invention.
In some alternative embodiments, referring to fig. 9 and 12, in the present embodiment, the non-display area NA includes a fourth switch 61 and a third control line 32;
the gate of the fourth switch 61 is electrically connected to the third control line 32, the first pole of the fourth switch 61 is electrically connected to the first shift register 41, and the second pole of the fourth switch 61 is electrically connected to the fingerprint control line 14.
Optionally, in the fingerprint identification stage, the third control line 32 controls the fourth switch 61 to be turned on;
in the display phase, the third control line 32 controls the fourth switch 61 to be turned off.
In this embodiment, a fourth switch 61 and a third control line 32 are disposed in the non-display area NA, and the third control line 32 is used to control the fourth switch 61 to be turned on or off. When the third control line 32 controls the fourth switch 61 to be turned on, the electrical signal of the gate driving circuit 50 is transmitted to the fingerprint control line 14 for fingerprint identification; when the third control line 32 controls the fourth switch 61 to be turned off, the electric signal of the gate driving circuit 50 is transmitted to the gate line GL for displaying.
Optionally, the gates of the plurality of fourth switches 61 may be electrically connected to the same third control line 32, the control line 32 controls the plurality of fourth switches 61 to be turned on simultaneously, and the fingerprint control line 14 receives the driving signals line by line.
In the display panel provided by this embodiment, by setting the fourth switch 61 and the third control line 32, it can be controlled whether the fingerprint control line 14 receives the driving signal of the gate driving circuit 50 at the fingerprint identification stage and the display stage, respectively, so as to enrich the functions of the display panel, enrich the use scenes, and improve the user experience.
The invention also provides a display device comprising the display panel provided by any one of the above embodiments of the invention. Referring to fig. 13, fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention. Fig. 13 provides a display device 1000 including the display panel 1001 according to any of the above embodiments of the present invention. The embodiment of fig. 13 is only an example of a mobile phone, and the display device 1000 is described, it is to be understood that the display device provided in the embodiment of the present invention may be other display devices with 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 provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
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:
in one aspect, the fingerprint recognition unit is disposed in the display area and may be formed during a process of manufacturing the display panel. Compared with the prior art, the fingerprint identification module does not need to be additionally manufactured, so that the manufacturing process and cost can be saved, and the display device is light and thin. On the other hand, the fingerprint identification unit is arranged in the display area, and does not occupy the space of the non-display area, so that the narrow frame of the display panel is facilitated, the screen occupation ratio is improved, and the display effect of the full screen is achieved. In another aspect, the fingerprint identification module can multiplex the existing signal wires in the display panel to transmit the electric signals, and the signal wires not only can realize the display function for the electric signals transmitted by the conductive electrodes, but also can realize the fingerprint identification function for the electric signals transmitted by the fingerprint identification unit, so that the wire routing structure of the display panel can be simplified; moreover, the chip for processing the signal wiring can be multiplexed and used for processing the electric signal of the fingerprint identification module, and compared with the prior art, the cost of the display panel can be reduced without adding an additional fingerprint identification chip.
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 surrounding the display area;
the display panel comprises a plurality of fingerprint identification modules, and each fingerprint identification module comprises a fingerprint identification unit, a signal switching unit and a signal routing; the fingerprint identification unit is positioned in the display area;
the signal switching unit comprises a first input end, a first output end and a second output end; the first input end is electrically connected with the signal wiring, the first output end is electrically connected with the fingerprint identification unit, and the second output end is electrically connected with the conductive electrode; the display area comprises pixel electrodes, the conductive electrodes are multiplexed into the pixel electrodes, and the signal wires are multiplexed into data wires;
in the fingerprint identification stage, the first input end and the first output end are conducted, and the first input end and the second output end are insulated;
in a display phase, the first input terminal and the first output terminal are insulated, and the first input terminal and the second output terminal are conducted.
2. The display panel according to claim 1,
the fingerprint identification module comprises a fingerprint control line;
the fingerprint recognition unit includes: a first switch and a photodiode; the grid electrode of the first switch is electrically connected with the fingerprint control line, and the first pole of the first switch is electrically connected with the photosensitive diode; the second pole of the first switch is electrically connected with the first output end; the first pole of the first switch is a source or a drain, and the second pole of the first switch is a drain or a source.
3. The display panel according to claim 1,
the signal switching unit includes: a second switch and a third switch; wherein the content of the first and second substances,
a grid electrode of the second switch is electrically connected with a first end of a first control line, a first pole of the second switch is electrically connected with the first output end, a second pole of the second switch is electrically connected with the first input end, the first pole of the second switch is a source electrode or a drain electrode, and the second pole of the second switch is a drain electrode or a source electrode;
the grid electrode of the third switch is electrically connected with the first end of the second control line, the first pole of the third switch is electrically connected with the second output end, and the second pole of the third switch is electrically connected with the first input end; the first pole of the third switch is a source or a drain, and the second pole of the third switch is a drain or a source.
4. The display panel according to claim 3,
the non-display area comprises a bonding area, and the bonding area comprises a plurality of conductive bonding pads;
the second end of the first control line is electrically connected to the conductive pad, and the second end of the second control line is electrically connected to the conductive pad.
5. The display panel according to claim 4,
one of the second switch and the third switch is a P-type thin film transistor, and the other one is an N-type thin film transistor;
the first control line and the second control line are electrically connected to the same conductive pad.
6. The display panel according to claim 2,
the non-display area comprises a driving circuit, the driving circuit comprises a plurality of shift registers, the driving circuit is electrically connected with the fingerprint control line, and the shift registers are used for generating driving signals;
in the fingerprint identification phase, the driving circuit transmits a driving signal to the fingerprint control line.
7. The display panel according to claim 2,
the display area comprises a plurality of gate lines;
the non-display area comprises a gate driving circuit which is electrically connected with the plurality of gate lines;
the gate driving circuit includes a plurality of first shift registers;
the first shift register is electrically connected with the fingerprint control line.
8. The display panel according to claim 7,
the non-display area includes a fourth switch and a third control line;
a grid electrode of the fourth switch is electrically connected with a first end of the third control line, a first pole of the fourth switch is electrically connected with the first shift register, and a second pole of the fourth switch is electrically connected with the fingerprint control line; the first pole of the fourth switch is a source or a drain, the second pole of the fourth switch is a drain or a source, and the second end of the third control line is electrically connected with the conductive bonding pad.
9. The display panel according to claim 8,
in the fingerprint identification stage, the third control line controls the fourth switch to be conducted;
and in the display stage, the third control line controls the fourth switch to be switched off.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN109358706B true CN109358706B (en) | 2021-09-28 |
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| CN110095910B (en) * | 2019-04-23 | 2022-05-17 | 昆山龙腾光电股份有限公司 | Thin film transistor array substrate and touch display panel |
| WO2021035583A1 (en) * | 2019-08-28 | 2021-03-04 | 深圳市汇顶科技股份有限公司 | Fingerprint detection apparatus and electronic device |
| CN110928083B (en) * | 2019-11-11 | 2022-06-10 | 厦门天马微电子有限公司 | Display panel and display device |
| CN111142708B (en) * | 2019-12-27 | 2022-07-26 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN115620350A (en) * | 2021-07-14 | 2023-01-17 | 群创光电股份有限公司 | Electronic device |
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