CN109739379B - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN109739379B CN109739379B CN201811615377.2A CN201811615377A CN109739379B CN 109739379 B CN109739379 B CN 109739379B CN 201811615377 A CN201811615377 A CN 201811615377A CN 109739379 B CN109739379 B CN 109739379B
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Abstract
The invention discloses a display panel, a driving method thereof and a display device, wherein the display panel comprises: a display area and a non-display area surrounding the display area; the display area comprises a plurality of touch units, a plurality of sub-pixels arranged in an array and a plurality of fingerprint identification units; the sub-pixels are electrically connected with one display scanning line and one display data line; the fingerprint identification unit is electrically connected with a fingerprint scanning line and a fingerprint data line; the touch unit is electrically connected with one touch line; the non-display region comprises a driving unit and a gate driver which are electrically connected; at least one first region arranged in the second direction, the first region including at least two second regions arranged in the first direction; the at least one second region includes at least one pressure detection unit, and the pressure detection unit is electrically connected with the driving unit. Fingerprint information of the user under different pressure levels can be obtained, authority verification is carried out through the information, and safety of the authority verification is effectively improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a driving method thereof and a display device.
Background
Fingerprints are unique to each individual. With the development of science and technology, a variety of display devices with fingerprint identification functions appear in the market, such as mobile phones, tablet computers, intelligent wearable devices and the like. Therefore, before the user operates the display device with the fingerprint identification function, the user only needs to touch the fingerprint identification unit of the display device with a finger to carry out authority identification, and the authority identification process is simplified.
In the process of realizing the authority verification through the fingerprint, on one hand, the fingerprint information needs to be scanned and acquired, on the other hand, the acquired fingerprint information needs to be compared with the stored information, and the authority verification can be passed only after the comparison is finished. Once a lawbreaker copies the fingerprint or records the fingerprint information by means of Trojan horse and the like, the fingerprint can pass the authority verification illegally, and huge potential safety hazards are brought.
Disclosure of Invention
In view of the above, the present invention provides a display device, including: a display area and a non-display area surrounding the display area; the display area comprises a plurality of touch units, a plurality of sub-pixels and a plurality of fingerprint identification units which are arranged in an array manner, a plurality of display scanning lines and a plurality of fingerprint scanning lines which extend along a first direction, a plurality of touch lines and a plurality of display data lines and a plurality of fingerprint data lines which extend along a second direction, and the first direction is intersected with the second direction; the sub-pixels are electrically connected with one display scanning line and one display data line; the fingerprint identification unit is electrically connected with a fingerprint scanning line and a fingerprint data line; the touch unit is electrically connected with one touch line; the non-display area comprises a driving unit and a grid driver which are electrically connected, the touch control line, the display data line and the fingerprint data line are electrically connected with the driving unit, and the display scanning line and the fingerprint scanning line are electrically connected with the grid driver; at least one first region arranged in the second direction, the first region including at least two second regions arranged in the first direction; the at least one second region includes at least one pressure detection unit, and the pressure detection unit is electrically connected with the driving unit.
The invention also provides a driving method of the display panel, the display panel is the display panel provided by the invention, and the driving method comprises the following steps: the driving unit sends out scanning signals of a plurality of periods, each period comprises a plurality of first time sequences and a plurality of second time sequences, and the first time sequences and the second time sequences are sequentially and alternately carried out; in a first time sequence, the driving unit generates a scanning control signal and transmits the scanning control signal to the grid driver, and the grid driver sends out a first scanning signal to the display scanning line; in a second time sequence, the driving unit generates a touch detection signal and transmits the touch detection signal to the touch line; after the touch unit detects and determines the touch position, the driving unit generates a pressure detection signal and transmits the pressure detection signal to the pressure detection unit located in the second area closest to the touch position, the driving unit generates a fingerprint detection signal and transmits the fingerprint detection signal to the grid driver, and the grid driver sends a second scanning signal to a fingerprint scanning line in the first area closest to the touch position.
The invention also provides a display device which comprises the display panel provided by the invention.
Compared with the prior art, the display panel, the driving method thereof and the display device provided by the invention at least realize the following beneficial effects:
the display panel comprises at least one first area arranged along the second direction, after the touch unit detects that touch occurs and determines the position where the touch occurs, the fingerprint identification unit in the first area where the position where the touch occurs is driven to perform fingerprint identification, the fingerprint identification unit in the whole display area is not required to be driven to perform fingerprint identification, and the power consumption of the display panel is effectively reduced. The first area comprises at least two second areas arranged along the first direction, the at least one second area comprises at least one pressure detection unit, after the touch unit detects that touch occurs and determines the position where the touch occurs, the pressure detection unit in the second area close to the position where the touch occurs is driven to perform pressure detection, the pressure detection unit in the whole display panel does not need to be driven to perform pressure detection, and power consumption of the display panel is further reduced. The driving unit receives and processes the fingerprint information obtained by the fingerprint identification unit and the pressure information obtained by the pressure detection unit, so that the fingerprint information of the user under different pressure levels can be obtained, and the authority verification is performed through the information, so that the safety of the authority verification is effectively improved.
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 structural diagram of a display panel according to the present invention;
FIG. 2 is a schematic structural diagram of a touch unit in the display panel shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view of another display panel provided in the present invention;
FIG. 4 is a schematic plane structure diagram of another display panel provided by the present invention;
FIG. 5 is an equivalent circuit diagram of a control circuit provided by the present invention;
FIG. 6 is an enlarged schematic view of section H of FIG. 4;
FIG. 7 is a schematic structural diagram of a pressure detecting unit according to the present invention;
FIG. 8 is an equivalent circuit diagram of a pressure sensor provided by an embodiment of the present invention;
FIG. 9 is a timing diagram of a driving method of a display panel according to the present invention;
FIG. 10 is another timing diagram corresponding to the driving method of the display panel according to the present invention;
fig. 11 is a schematic structural diagram of a display device according to 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.
Fig. 1 is a schematic structural diagram of a display panel provided by the present invention, fig. 2 is a schematic structural diagram of a touch unit in the display panel shown in fig. 1, fig. 3 is a schematic cross-sectional structural diagram of another display panel provided by the present invention, and referring to fig. 1 to fig. 3, 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 area AA includes a plurality of touch units 10, a plurality of sub-pixels 20 and a plurality of fingerprint identification units 30 arranged in an array, a plurality of display scan lines 21 and a plurality of fingerprint scan lines 31 extending along a first direction X, a plurality of touch lines 11 extending along a second direction Y, a plurality of display data lines 22 and a plurality of fingerprint data lines 32, and the first direction X intersects with the second direction Y;
the sub-pixel 20 is electrically connected with one display scanning line 21 and one display data line 22;
the fingerprint identification unit 30 is electrically connected with a fingerprint scanning line 31 and a fingerprint data line 32;
the touch unit 10 is electrically connected with one touch line 11;
the non-display area NA comprises a driving unit 40 and a gate driver 50 which are electrically connected, the touch control line 11, the display data line 22 and the fingerprint data line 32 are all electrically connected with the driving unit 40, and the display scanning line 21 and the fingerprint scanning line 31 are all electrically connected with the gate driver 50;
at least one first region 60 arranged along the second direction Y, the first region 60 comprising at least two second regions 61 arranged along the first direction X;
the at least one second region 61 includes at least one pressure detecting unit 70, and the pressure detecting unit 70 and the driving unit 50 are electrically connected.
Specifically, in the display panel provided in this embodiment, the display area AA has a display function, and the non-display area NA may be provided with structures such as circuit elements and traces.
The display area AA includes a plurality of sub-pixels 20, one sub-pixel 20 is electrically connected to one display scan line 21 and one display data line 22, the gate driver 50 generates a pulse type display scan signal to the display scan line 21 according to a timing sequence, so as to open the sub-pixels 20 row by row, and the opened sub-pixels 20 receive a data signal transmitted by the driving unit 40 through the display data line 22, so as to display the sub-pixels 20.
The display area AA further includes a plurality of touch units 10, one touch line 11 of the touch units 10 is electrically connected, and the touch line 11 transmits an electrical signal to the touch unit 10. In the present embodiment, only one touch unit 10 is electrically connected to one touch line 11 for illustration. Alternatively, one touch unit 10 may be electrically connected to two or more touch lines 11, which is not limited in this embodiment.
Specifically, the touch unit 10 is an electrode block, and when performing touch detection, the touch line 11 transmits a touch signal to the touch unit 10 electrically connected thereto, and the touch unit 10 receives the touch signal and forms a ground capacitance with the ground, which serves as a base capacitance for detecting touch operation. When a touch operation occurs, the basic capacitance of the touch unit 10 at the corresponding position changes, and the position information of the touch operation can be obtained by calculating and analyzing the basic capacitance change condition of a plurality of touch units 10. In other embodiments of the present invention, a touch detection structure based on a mutual capacitance method or a touch detection structure based on a combination of a self-capacitance method and a mutual capacitance method may also be employed.
The display area AA further includes a plurality of fingerprint identification units 30, the gate driver 50 drives the fingerprint identification units 30 through the fingerprint scan lines 31, since the ridges 34 pressed in the finger fingerprint of the display panel are in contact with the surface of the display panel, and the valleys 33 are not in contact with the surface of the display panel, so that the reflectivities of the light rays irradiated onto the display panel at the positions corresponding to the valleys 33 and the ridges 34 of the fingerprint are different, and further the intensities of the reflected light formed at the positions of the ridges 33 and the reflected light formed at the positions of the valleys 34 received by the fingerprint identification units 30 are different, so that the magnitudes of the photocurrents converted from the reflected light formed at the positions of the ridges 34 and the reflected light formed at the positions of the valleys 33 are different, and the magnitudes of the photocurrents in the fingerprint identification units 30 are detected through the fingerprint data lines 32 and the photocurrent information is transmitted to the driving unit 40 to form the fingerprint information.
The display panel provided by the embodiment includes at least one first area 60 arranged along the second direction Y, and after the touch unit 10 detects that a touch occurs and determines the position where the touch occurs, the fingerprint identification unit 30 in the first area 60 where the position where the touch occurs is driven to perform fingerprint identification, and the fingerprint identification unit 30 in the whole display area AA does not need to be driven to perform fingerprint identification, thereby effectively reducing the power consumption of the display panel. The first region 60 includes at least two second regions 61 arranged along the first direction X, and at least one of the second regions 61 includes at least one pressure detection unit 70, and after detecting the occurrence of a touch and determining the position of the occurrence of the touch through the touch unit 10, the pressure detection unit 70 in the second region 61 close to the position of the occurrence of the touch is driven to perform pressure detection, and the pressure detection unit 70 in the whole display panel is not required to be driven to perform pressure detection, thereby further reducing the power consumption of the display panel. The driving unit 40 receives and processes the fingerprint information obtained by the fingerprint identification unit 30 and the pressure information obtained by the pressure detection unit 70, so that the fingerprint information of the user under different pressure levels can be obtained to form dynamic fingerprint information and record the dynamic fingerprint information, when the user performs authority verification, the user acquires corresponding pressure and the fingerprint when using the pressure and compares the pressure with the recorded dynamic fingerprint information, the acquired pressure and the fingerprint under the pressure are the same as the recorded dynamic fingerprint information, and the authority verification can be passed, so that the safety of the authority verification is effectively improved.
It should be noted that, in the present embodiment, the display panel includes three first regions 60 arranged along the second direction Y, the first regions 60 include two second regions 61 arranged along the first direction X, and each of the second regions 61 includes one pressure detection unit 70, in other embodiments of the present invention, the number of the first regions 60 in the display panel may also be other values, the first regions 60 include three or more second regions 61, and the second regions 61 do not include a pressure detection unit 70 or include two or more pressure detection units 70, which may be set according to actual production needs.
It should be noted that, in order to clearly illustrate the technical solution of the present embodiment, fig. 1 does not show a touch unit and a touch line, fig. 2 illustrates structures of the touch unit and the touch line in the display panel illustrated in fig. 1, and the display panel provided in the present embodiment may be referred to with reference to fig. 1 and fig. 2.
Fig. 4 is a schematic plan view of another display panel provided by the present invention, referring to fig. 4, optionally, wherein the gate driver 50 includes a plurality of cascaded shift registers 51, and the shift registers 51 are electrically connected to one display scan line 21 and one fingerprint scan line 31 through a control circuit 52.
Specifically, each shift register 51 in the gate driver 50 supplies a scan signal to one display scan line 21 and one fingerprint scan line 31, and selectively supplies the scan signal to the display scan line 21 electrically connected thereto for turning on the sub-pixel 20 or supplies the scan signal to the fingerprint scan line 31 electrically connected thereto for driving the fingerprint identification unit 30 through the control circuit 52.
It should be noted that the shift register 51 may include a plurality of transistors, capacitor elements, and other circuit structures, and the specific circuit structure of the shift register unit 20 is not particularly limited in this embodiment.
Fig. 5 is an equivalent circuit diagram of a control circuit provided by the present invention, referring to fig. 4 and 5, and optionally, wherein the control circuit 52 includes a first switch SW1 and a second switch SW 2;
the first pole S1 of the first switch SW1 is electrically connected to the shift register 51, and the second pole S2 of the first switch SW1 is electrically connected to the display scan line 21;
the first pole S3 of the second switch SW2 is electrically connected to the shift register 51, and the second pole S4 of the second switch SW2 is electrically connected to the fingerprint scanning line 31.
Specifically, the first switch SW1 is turned on, and the shift register 51 supplies a scan signal to the display scan line 21, so that the sub-pixel 20 is turned on; the second switch SW2 is turned on, and the shift register 51 supplies a driving signal to the fingerprint scanning line 31, so that the fingerprint recognition unit 30 performs fingerprint recognition. The driving of the fingerprint identification unit 30 in the same row and the displaying of the sub-pixels 20 in the same row can be controlled by connecting the control circuit 52 with the same shift register 51, so that the frame of the display panel is effectively reduced.
With continued reference to fig. 4, optionally, wherein the shift register 51 comprises a signal input terminal In, a first signal output terminal Out1 and a second signal output terminal Out 2;
the first signal output terminal Out1 is electrically connected to the control circuit 52, and the second signal output terminal Out2 of each stage of the shift register 51 is electrically connected to the signal input terminal In of the next stage of the shift register 51.
The plurality of shift registers 51 are connected In a cascade manner, and except that the input terminal In of the first stage shift register 51a receives the Start signal from the driving unit 40, the input terminal In of each shift register 51 is electrically connected to the second signal output terminal Out2 of the previous stage shift register 51. A first signal output Out1 of each shift register 51 is used to transmit a signal to the control circuit 52. This embodiment provides a cascade connection manner of the plurality of shift registers 51, and it can be understood that in other optional implementation manners, there are a plurality of electrical connection manners of the plurality of shift registers 51, and details are not described in this embodiment again.
Fig. 6 is an enlarged schematic view of section H of fig. 4, with continued reference to fig. 4 and 6, and optionally wherein the sub-pixel 20 includes a thin film transistor 23 and a pixel electrode 24;
the source 232 of the thin film transistor 23 is connected to the display data line 22, the gate 231 of the thin film transistor 23 is connected to the display scan line 21, and the drain 233 of the thin film transistor 23 is connected to the pixel electrode 24.
Specifically, the gate 231 of the thin film transistor 23 of the sub-pixel 20 is connected to the display scan line 21, a high level signal is applied to the thin film transistor 23 through the display scan line 21, so that the thin film transistor 23 is in a conducting state, and the corresponding pixel electrode 24 is charged through the display data line 22, so that the pixel electrode 24 reaches the target potential from the initial potential.
With continued reference to fig. 4, optionally, wherein the sub-pixels 20 are arranged in a one-to-one correspondence with the fingerprint identification unit 30;
the display scan line 21 electrically connected to the sub-pixel 20 and the fingerprint scan line 31 electrically connected to the fingerprint identification unit 30 corresponding to the sub-pixel 20 are disposed at two ends of the sub-pixel 20 along the second direction Y;
the display data lines 22 electrically connected to the sub-pixels 20 and the fingerprint data lines 32 electrically connected to the fingerprint identification unit 30 corresponding to the sub-pixels 20 are disposed at both ends of the sub-pixels 20 along the first direction X.
Specifically, the sub-pixels 20 and the fingerprint identification units 30 are arranged in a one-to-one correspondence manner, so that the structure of each sub-pixel 20 is relatively uniform, and the uniformity of the display effect is ensured; the fingerprint identification units 30 are uniformly distributed in the display area AA, so that full-screen fingerprint identification of the display panel is realized; moreover, the density of the fingerprint identification units 30 is approximately the same as that of the sub-pixels 20, so that the number of fingerprint identification units in a unit area can be sufficient to ensure the accuracy of fingerprint identification.
The sub-pixel 20 is disposed in a space defined by the intersection of the display scan line 21 and the display data line 22 electrically connected to the sub-pixel 20, and since the thin film transistor 23 in the sub-pixel 20 is disposed near the intersection of the display scan line 21 and the display data line 22, the structure of the film layer at the position where the thin film transistor 23 is disposed in the display panel is complicated, and the display scan line 21 electrically connected to the sub-pixel 20 and the fingerprint scan line 31 electrically connected to the fingerprint identification unit 30 corresponding to the sub-pixel 20 are not disposed on the same side of the sub-pixel 20; the display data line 22 electrically connected to the sub-pixel 20 and the fingerprint data line 32 electrically connected to the fingerprint identification unit 30 corresponding to the sub-pixel 20 are not necessarily disposed on the same side of the sub-pixel 20. It should be noted that, in other embodiments of the present invention, the display scan lines 21 electrically connected to the sub-pixels 20 and the fingerprint scan lines 31 electrically connected to the fingerprint identification unit 30 corresponding to the sub-pixels 20 may also adopt other arrangements, and the display data lines 22 electrically connected to the sub-pixels 20 and the fingerprint data lines 32 electrically connected to the fingerprint identification unit 30 corresponding to the sub-pixels 20 may also adopt other arrangements, which are not described in detail herein.
Fig. 7 is a schematic structural diagram of a pressure detecting unit provided by the present invention, referring to fig. 7, in an alternative, wherein the pressure detecting unit 70 includes a first connecting end 71a, a second connecting end 71b, a third connecting end 71c and a fourth connecting end 71 d;
the first connecting end 71a and the third connecting end 71c are oppositely arranged along a third direction E, the second connecting end 71b and the fourth connecting end 71d are oppositely arranged along a fourth direction F, and the third direction E is intersected with the fourth direction F;
the first connection terminal 71a is electrically connected to the first power input terminal Vcc1, the second connection terminal 71b is electrically connected to the first sensing signal measuring terminal V +, the third connection terminal 71c is electrically connected to the second power input terminal Vcc2, and the fourth connection terminal 71d is electrically connected to the second sensing signal measuring terminal V-.
Fig. 8 is an equivalent circuit diagram of a pressure sensor according to an embodiment of the present invention, and as shown in fig. 8, the pressure sensor may be equivalent to a wheatstone bridge structure, the first pressure-sensitive resistor R1, the second pressure-sensitive resistor R2, the third pressure-sensitive resistor R3, and the fourth pressure-sensitive resistor R4 are connected to form a quadrilateral ABCD, which is called four arms of a bridge, the first pressure-sensitive resistor R1 and the third pressure-sensitive resistor R3 are used for sensing a stress change in a fifth direction N, the second pressure-sensitive resistor R2 and the fourth pressure-sensitive resistor R4 are used for sensing a stress change in a sixth direction M, and the fifth direction N, the sixth direction M, the third direction E, and the fourth direction F intersect. A diagonal BD of the quadrilateral ABCD is connected with a galvanometer G, two poles of the galvanometer G are connected with a first induction signal measuring signal line V + and a second induction signal measuring signal line V-, and A, C on a diagonal AC of the quadrilateral ABCD is respectively connected with a first power supply input signal line Vcc1 and a second power supply input signal line Vcc 2. When there is a difference between the voltage provided on the first power input signal line Vcc1 and the voltage provided on the second power input signal line Vcc2, current flows through each branch in the bridge circuit. In a non-pressure state, the resistances of the first pressure-sensing resistor R1, the second pressure-sensing resistor R2, the third pressure-sensing resistor R3 and the fourth pressure-sensing resistor R4 satisfy that R1/R4 is R2/R3, potentials between two points BD are equal, a current flowing through the galvanometer G is zero, a pointer of the galvanometer G indicates a zero scale, the bridge is in a balanced state, and the bridge balance condition is called that R1/R4 is R2/R3. When the pressure sensor is stressed, the resistance values of at least part of resistors in the pressure sensor are changed, the bridge balance condition is destroyed, the potentials of the two points BD are not equal, the current flowing through the galvanometer G is not 0, a pointer of the galvanometer G deflects and outputs a corresponding electric signal, the values of R1/R4 and R2/R3 can be determined according to the electric signal of the galvanometer, the change of the resistance values of the pressure sensing resistors after being stressed relative to the initial resistance value is further determined, and then the touch pressure value is determined.
With continued reference to fig. 2, optionally, wherein the pressure detecting unit 70 is located in the non-display area NA.
Specifically, since more materials in the pressure detecting unit 70 are metal materials and have opacity, the pressure detecting unit 70 can be disposed in the non-display area NA to avoid affecting the transmittance of the display area AA. It should be noted that, in other embodiments of the present invention, the pressure detecting unit 70 may also be disposed in the display area AA.
Fig. 9 is a timing chart corresponding to a driving method of a display panel provided by the present invention, and referring to fig. 1, fig. 2 and fig. 9, the present embodiment provides a driving method of a display panel, where the driving method includes:
the driving unit 40 sends out a plurality of scanning signals of a period t, each period t comprises a plurality of first time sequences t1 and a plurality of second time sequences t2, and the first time sequences t1 and the second time sequences t2 are sequentially and alternately performed;
in a first timing t1, the driving unit 40 generates a scan control signal to transmit to the gate driver 50, and the gate driver 50 sends a first scan signal to the display scan line 21;
in a second timing t2, the driving unit 40 generates a touch detection signal to transmit to the touch line 11;
after the touch unit 10 detects and determines the touch position, the driving unit 40 generates a pressure detection signal and transmits the pressure detection signal to the pressure detection unit 70 located in the second area 61 closest to the touch position, and the driving unit 40 generates a fingerprint detection signal and transmits the fingerprint detection signal to the gate driver 50, and the gate driver 50 sends out a second scanning signal to the fingerprint scanning line 31 in the first area 60 closest to the touch position.
Specifically, each period t includes a plurality of first timing sequences t1 and a plurality of second timing sequences t2, in the first timing sequence t1, the driving unit 40 generates a scan control signal to transmit to the gate driver 50, and the gate driver 50 sends a first scan signal (the first scan signal is a high-level signal in fig. 9) to the sequential partial display scan lines 21, so that the sub-pixels 20 electrically connected to the partial display scan lines 21 are turned on by the first scan signal. In the second timing t2, the driving unit 40 generates a touch detection signal to be transmitted to the touch line 11 (the touch detection signal is taken as a high-level signal in fig. 9 for illustration), so that the touch unit 10 electrically connected to the portion of the touch line 11 performs touch detection to determine whether a touch phenomenon occurs in the display panel and a position where the touch occurs. After the touch unit 10 detects and determines the touch position at a second timing t2, in a first timing t1a following the second timing t2, the driving unit 40 generates a pressure detection signal to the pressure detection unit 70 located in the second area 61 closest to the touch position (the pressure detection signal is a high-level signal in fig. 9 for illustration), so that the pressure detection unit 70 detects the pressure of the touch; meanwhile, the driving unit 40 generates a fingerprint detection signal and transmits the fingerprint detection signal to the gate driver 50, and the gate driver 50 transmits a second scanning signal (the second scanning signal is a high-level signal in fig. 9) to the fingerprint scanning line 31 in the first region 60 closest to the touch position, so that the fingerprint identification unit 30 performs fingerprint identification on the touch subject, thereby obtaining fingerprint information of the user at different pressure levels, performing authority authentication through the information, and effectively improving the safety of the authority authentication. And the pressure detection unit 70 in the whole display panel is not required to be driven for pressure detection, and the fingerprint identification unit 30 in the whole display area AA is not required to be driven for fingerprint identification, so that the power consumption of the display panel is effectively reduced.
With continued reference to fig. 1, 2, and 9, optionally, wherein the rising edge of the pressure detection signal and the falling edge of the second scan signal are aligned.
The gate driver 50 sends a touch detection signal to a portion of the touch line 11 to enable the touch unit 10 electrically connected to the portion 11 to perform touch detection to determine whether a touch phenomenon occurs in the display panel and a position where the touch occurs, and upon determining that the touch phenomenon occurs, the driving unit 40 generates a pressure detection signal to the pressure detection unit 70 located in the second region 61 closest to the touch position to perform pressure detection.
Fig. 10 is another timing diagram corresponding to the driving method of the display panel provided by the present invention, referring to fig. 1, fig. 4, fig. 5 and fig. 10, optionally, wherein the scan control signal of each period t sequentially drives each shift register 51;
each shift register 51 outputs a first switching signal, a first scan signal, and a secondary trigger signal;
after the touch unit 10 detects and determines the touch position, each shift register 51 located in the first area 60 closest to the touch position outputs a second switching signal and a second scanning signal.
Specifically, each shift register 51 outputs a first switch signal to turn on the first switch SW1 (the first switch signal is taken as a high-level signal in fig. 10), so that the shift register 51 sends a first scan signal (the first scan signal is taken as a high-level signal in fig. 10) to the display scan line 21 electrically connected thereto, and the sub-pixel 20 electrically connected to the part of the display scan line 21 is turned on by the first scan signal. After the touch unit 10 detects and determines the touch position, the driving unit 40 generates a pressure detection signal to the pressure detection unit 70 (the pressure detection signal is a high-level signal in fig. 10) located in the second area 61 closest to the touch position, so that the pressure detection unit 70 detects the pressure of the touch, while the first shift register 51 located in the first area 60 closest to the touch position outputs the second switching signal to turn on the second switch SW2 (the second switching signal is exemplified as a high-level signal in fig. 10), so that the shift register 51 sends out the second scanning signal (the second scanning signal is taken as a high level signal in the example of fig. 10) to the fingerprint scanning line 31 electrically connected with the shift register, so that the fingerprint recognition unit 30 electrically connected to the fingerprint scan line 31 performs fingerprint recognition on the touch subject; and pulling up the secondary trigger signal Next, so that the shift register 51 at the Next stage outputs a second switch signal to turn on the second switch SW2, and sends a second scanning signal to the fingerprint scanning line 31 electrically connected with the second switch SW2 until the secondary trigger signal in the last shift register 51 in the first region 60 closest to the touch position returns to the original state, thereby realizing the fingerprint recognition of the touch subject by the fingerprint recognition unit 30 in the first region 60 closest to the touch position.
An embodiment of the present invention provides a display device, including the display panel 100 as described above.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a display device according to the present invention. Fig. 11 provides a display device 1000 including the display panel 100 according to any of the above embodiments of the present invention. The embodiment of fig. 11 is only an example of a mobile phone, and the display device 1000 is described, it is understood that the display device 100 provided in the embodiment of the present invention may be other display devices 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 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, the driving method thereof, and the display device provided by the present invention at least achieve the following advantages:
the display panel comprises at least one first area arranged along the second direction, after the touch unit detects that touch occurs and determines the position where the touch occurs, the fingerprint identification unit in the first area where the position where the touch occurs is driven to perform fingerprint identification, the fingerprint identification unit in the whole display area is not required to be driven to perform fingerprint identification, and the power consumption of the display panel is effectively reduced. The first area comprises at least two second areas arranged along the first direction, the at least one second area comprises at least one pressure detection unit, after the touch unit detects that touch occurs and determines the position where the touch occurs, the pressure detection unit in the second area close to the position where the touch occurs is driven to perform pressure detection, the pressure detection unit in the whole display panel does not need to be driven to perform pressure detection, and power consumption of the display panel is further reduced. The driving unit receives and processes the fingerprint information obtained by the fingerprint identification unit and the pressure information obtained by the pressure detection unit, so that the fingerprint information of the user under different pressure levels can be obtained, and the authority verification is performed through the information, so that the safety of the authority verification is effectively improved.
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 (12)
1. A display panel, comprising: a display area and a non-display area surrounding the display area;
the display area comprises a plurality of touch units, a plurality of sub-pixels and a plurality of fingerprint identification units which are arranged in an array manner, a plurality of display scanning lines and a plurality of fingerprint scanning lines which extend along a first direction, a plurality of touch lines and a plurality of display data lines and a plurality of fingerprint data lines which extend along a second direction, and the first direction is intersected with the second direction;
the sub-pixels are electrically connected with one display scanning line and one display data line;
the fingerprint identification unit is electrically connected with one fingerprint scanning line and one fingerprint data line;
the touch unit is electrically connected with one touch line;
the non-display area comprises a driving unit and a grid driver which are electrically connected, a touch line, a display data line and a fingerprint data line are all electrically connected with the driving unit, and a display scanning line and a fingerprint scanning line are all electrically connected with the grid driver;
at least one first region arranged in the second direction, the first region including at least two second regions arranged in the first direction;
at least one of the second regions comprises at least one pressure detection unit, and the pressure detection unit is electrically connected with the driving unit;
after the touch control unit detects that touch occurs and determines the position where the touch occurs, the fingerprint identification unit in the first area where the position where the touch occurs is driven to perform fingerprint identification, the pressure detection unit in the second area close to the position where the touch occurs is driven to perform pressure detection, and the driving unit receives and processes fingerprint information obtained through the fingerprint identification unit and pressure information obtained through the pressure detection unit at the same time.
2. The display panel according to claim 1,
the grid driver comprises a plurality of cascaded shift registers, and the shift registers are electrically connected with one display scanning line and one fingerprint scanning line through a control circuit.
3. The display panel according to claim 2,
the control circuit comprises a first switch and a second switch;
a first pole of the first switch is electrically connected with the shift register, and a second pole of the first switch is electrically connected with the display scanning line;
the first pole of the second switch is electrically connected with the shift register, and the second pole of the second switch is electrically connected with the fingerprint scanning line.
4. The display panel according to claim 3,
the shift register comprises a signal input end, a first signal output end and a second signal output end;
the first signal output end is electrically connected with the control circuit, and the second signal output end of each stage of the shift register is electrically connected with the signal input end of the next stage of the shift register.
5. The display panel according to claim 1,
the sub-pixels are arranged in one-to-one correspondence with the fingerprint identification units;
the display scanning lines electrically connected to the sub-pixels and the fingerprint scanning lines electrically connected to the fingerprint identification units corresponding to the sub-pixels are arranged at two ends of the sub-pixels along the second direction;
the display data lines electrically connected to the sub-pixels and the fingerprint data lines electrically connected to the fingerprint identification units corresponding to the sub-pixels are disposed at two ends of the sub-pixels along the first direction.
6. The display panel according to claim 5,
the sub-pixel comprises a thin film transistor and a pixel electrode;
the source electrode of the thin film transistor is connected to the display data line, the grid electrode of the thin film transistor is connected to the display scanning line, and the drain electrode of the thin film transistor is connected to the pixel electrode.
7. The display panel according to claim 1,
the pressure detection unit is located in the non-display area.
8. The display panel according to claim 1,
the pressure detection unit comprises a first connecting end, a second connecting end, a third connecting end and a fourth connecting end;
the first connecting end and the third connecting end are oppositely arranged along a third direction, the second connecting end and the fourth connecting end are oppositely arranged along a fourth direction, and the third direction is intersected with the fourth direction;
the first connecting end is electrically connected with the first power input end, the second connecting end is electrically connected with the first induction signal measuring end, the third connecting end is electrically connected with the second power input end, and the fourth connecting end is electrically connected with the second induction signal measuring end.
9. A driving method of a display panel, characterized in that the display panel comprises the display panel of any one of claims 1 to 8;
the driving method includes:
the driving unit sends out scanning signals of a plurality of periods, each period comprises a plurality of first time sequences and a plurality of second time sequences, and the first time sequences and the second time sequences are sequentially and alternately carried out;
in the first time sequence, the driving unit generates a scanning control signal and transmits the scanning control signal to the grid driver, and the grid driver sends out a first scanning signal to the display scanning line;
in the second time sequence, the driving unit generates a touch detection signal and transmits the touch detection signal to the touch line;
after the touch unit detects and determines the touch position, the driving unit generates a pressure detection signal and transmits the pressure detection signal to the pressure detection unit located in the second area closest to the touch position, the driving unit generates a fingerprint detection signal and transmits the fingerprint detection signal to the grid driver, and the grid driver sends a second scanning signal to the fingerprint scanning line in the first area closest to the touch position.
10. The method for driving a display panel according to claim 9,
the scanning control signal of each period drives each shift register in sequence;
each shift register outputs a first switching signal, the first scanning signal and a secondary trigger signal;
after the touch unit detects and determines the touch position, each shift register located in the first area closest to the touch position outputs a second switch signal and a second scanning signal.
11. The method for driving a display panel according to claim 10,
the rising edge of the pressure detection signal and the falling edge of the touch detection signal are aligned.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| CN111209889A (en) * | 2019-05-16 | 2020-05-29 | 神盾股份有限公司 | Fingerprint sensor |
| CN110188702B (en) * | 2019-05-31 | 2021-03-30 | 上海天马微电子有限公司 | Display panel and display device |
| CN110715792B (en) * | 2019-10-30 | 2021-11-19 | 厦门天马微电子有限公司 | Display panel, test method and tool thereof and display device |
| CN110928068B (en) * | 2019-11-28 | 2022-03-11 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN110851024B (en) * | 2019-12-20 | 2022-10-04 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113823207A (en) * | 2020-06-18 | 2021-12-21 | 华为技术有限公司 | Drive control method and related equipment |
| CN114299840A (en) * | 2020-09-23 | 2022-04-08 | 群创光电股份有限公司 | Display device |
| CN112181202B (en) * | 2020-09-28 | 2023-11-07 | 厦门天马微电子有限公司 | Display device and driving method thereof |
| CN112766111B (en) * | 2021-01-08 | 2022-09-13 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
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