CN110796124A - Display panel driving method and display device - Google Patents
Display panel driving method and display device Download PDFInfo
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- CN110796124A CN110796124A CN201911180628.3A CN201911180628A CN110796124A CN 110796124 A CN110796124 A CN 110796124A CN 201911180628 A CN201911180628 A CN 201911180628A CN 110796124 A CN110796124 A CN 110796124A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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Abstract
The invention discloses a driving method and a display device of a display panel, belonging to the technical field of display, wherein the driving method at least comprises a fingerprint identification stage and a display stage, and the display panel comprises a fingerprint identification module and a display module; at least part of the sub-pixel rows are arranged in one-to-one correspondence with the fingerprint identification unit rows; the working time periods of the sub-pixels of the same sub-pixel row in the display phase and the working time periods of the fingerprint identification units of the fingerprint identification unit row corresponding to the sub-pixel row in the fingerprint identification phase are not overlapped. The display panel of the display device adopts the driving method. The display work and the fingerprint identification work are simultaneously carried out on the scanning work, but the display work and the fingerprint identification work are not carried out on the same sub-pixel row and the fingerprint identification unit row which is correspondingly arranged, so that the problem of crosstalk of transmission signals between a fingerprint signal line and a data line is avoided, and the fingerprint identification effect is favorably improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method of a display panel and a display device.
Background
The fingerprint identification technology is one of the biological identification technologies, and has the characteristics of universality, uniqueness, safety, collectability and the like. The fingerprint is a line formed by concave-convex skin on the finger abdomen at the tail end of a human finger, also called as a palm print, namely a raised line on the epidermis, and the fingerprint of a person is a combination of heredity and environment and is closely related to the health of the human body, so that the fingerprint is common to all people but different from each other. The display device integrated with the fingerprint identification function can enable the display device to execute a specific function by using the fingerprint identification function when a user uses the display device, and the fingerprint identification function is convenient, quick and high in safety and is one of the research and development directions of the display device.
Among the display device that prior art provided, need additionally to increase the fingerprint identification module in order to realize the fingerprint identification function, after making respectively and accomplish display panel and fingerprint identification module, assemble the two in order to realize the electricity and connect, consequently increased display device's technology processing procedure to the fingerprint identification module probably occupies certain region in display device, is unfavorable for realizing the full face screen.
With the rise of the full screen technology, fingerprint identification is gradually developed from the design outside the display screen to the design inside the display screen, namely, the fingerprint identification technology under the screen is pursued to obtain higher screen occupation ratio. Specifically, integrate a plurality of fingerprint identification components and parts in display panel's display area, form fingerprint identification components and parts array, then set up drive circuit through the frame district at display panel, realize the drive of fingerprint identification components and parts array, accomplish fingerprint identification. Although the display device for fingerprint identification in the integrated screen has a simple structure, the anti-noise interference capability is poor, and particularly after the display device is integrated, due to the problems of crosstalk and the like between the data lines and the like, the finally output detection signal has higher noise, and the fingerprint identification effect is easily influenced.
Therefore, it is an urgent technical problem to provide a display panel driving method and a display device that can reduce noise interference and improve fingerprint recognition effect, and can simultaneously realize fingerprint recognition and display driving.
Disclosure of Invention
In view of the above, the present invention provides a driving method of a display panel and a display device, so as to solve the problems of large noise of detection signals and poor fingerprint identification effect caused by crosstalk between traces in the prior art.
The invention provides a driving method of a display panel, which at least comprises a fingerprint identification stage and a display stage, wherein the working time period of the fingerprint identification stage is coincident with the working time period of the display stage; the display panel comprises a fingerprint identification module and a display module; the fingerprint identification module comprises a plurality of fingerprint scanning lines which are distributed along a second direction and extend along a first direction, a plurality of fingerprint signal lines which are distributed along the first direction and extend along the second direction, a plurality of fingerprint identification units which are distributed in an array manner, and a fingerprint identification driving circuit, wherein the fingerprint scanning lines and the fingerprint signal lines are crossed and insulated to define areas where the plurality of fingerprint identification units are located, the fingerprint identification units on the same row are electrically connected with the same fingerprint scanning line, and the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line; wherein the first direction intersects the second direction; the display module comprises a plurality of scanning lines which are arranged along a second direction and extend along the first direction, a plurality of data lines which are arranged along the first direction and extend along the second direction, a plurality of pixel units which are arranged in an array mode, and a scanning driving circuit, wherein each pixel unit comprises a plurality of sub-pixels, each pixel unit is correspondingly provided with at least one fingerprint identification unit, the scanning lines and the data lines are crossed to define an area where the sub-pixels are located, the sub-pixels in the same row are electrically connected with the same scanning line, and the scanning driving circuit is electrically connected with the scanning lines; along the second direction, the plurality of sub-pixels form a plurality of sub-pixel rows, the plurality of fingerprint identification units form a plurality of fingerprint identification unit rows, and at least part of the sub-pixel rows and the fingerprint identification unit rows are arranged in a one-to-one correspondence manner; the working time periods of the sub-pixels of the same sub-pixel row in the display phase and the working time periods of the fingerprint identification units of the fingerprint identification unit row corresponding to the sub-pixel row in the fingerprint identification phase are not overlapped.
Based on the same inventive concept, the invention also provides a display device, which comprises a display panel, and the driving method of the display panel comprises the driving method.
Compared with the prior art, the driving method of the display panel and the display device provided by the invention at least realize the following beneficial effects:
the working time periods of the sub-pixels of the same sub-pixel row in the display stage and the working time periods of the fingerprint identification units of the fingerprint identification unit row corresponding to the sub-pixel row in the fingerprint identification stage are not overlapped, namely although the working time periods of the fingerprint identification stage are overlapped with the working time periods of the display stage, the display work and the fingerprint identification work are simultaneously carried out the scanning work, but the same sub-pixel row and the fingerprint identification unit row correspondingly arranged with the sub-pixel row are not carried out the display work and the fingerprint identification work (staggered in space), thereby avoiding the problem of signal transmission crosstalk between a fingerprint signal line and a data line and between a scanning line and a fingerprint scanning line, reducing or eliminating the interference noise of the result of fingerprint identification detection transmitted to a fingerprint detection result receiving unit through the fingerprint signal line as much as possible when the fingerprint identification is finished, when the fingerprint identification and the display work of the display panel are realized in a shared mode, the fingerprint identification effect is 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 plan view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a driving method of a display panel according to an embodiment of the present invention;
FIG. 3 is a timing diagram of driving scan signals outputted by the fingerprint identification driving circuit and the scanning driving circuit in FIG. 2;
FIG. 4 is an equivalent circuit diagram of a fingerprint identification unit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
fig. 9 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, fig. 1 is a schematic plane structure diagram of a display panel according to an embodiment of the present invention, fig. 2 is a schematic structure diagram of a driving method of a display panel according to an embodiment of the present invention, fig. 3 is a timing diagram of driving scanning signals output by a fingerprint identification driving circuit and a scanning driving circuit in fig. 2, in order to clearly illustrate the technical solution of the embodiment, the fingerprint scanning lines E, the fingerprint signal lines F, the scanning lines G, and the data lines S are distinguished in different thicknesses in fig. 1 and fig. 2, and in specific implementation, the thicknesses of the structures may be set according to actual situations;
the driving method of the display panel provided by the embodiment at least comprises a fingerprint identification phase T1 and a display phase T2, wherein the working time period of the fingerprint identification phase T1 coincides with the working time period of the display phase T2;
the display panel 000 includes a fingerprint recognition module 10 and a display module 20;
the fingerprint identification module 10 comprises a plurality of fingerprint scanning lines E which are arranged along a second direction Y and extend along a first direction X, a plurality of fingerprint signal lines F which are arranged along the first direction X and extend along the second direction Y, a plurality of fingerprint identification units 101 which are arranged in an array manner, and a fingerprint identification driving circuit 102, wherein the fingerprint scanning lines E and the fingerprint signal lines F are crossed and insulated to define the areas where the plurality of fingerprint identification units 101 are located, the fingerprint identification units 101 in the same row are electrically connected with the same fingerprint scanning line E, and the fingerprint identification driving circuit 102 is electrically connected with the fingerprint scanning line E; wherein the first direction X intersects the second direction Y;
the display module 20 includes a plurality of scan lines G arranged along the second direction Y and extending along the first direction X, a plurality of data lines S arranged along the first direction X and extending along the second direction Y, a plurality of pixel units 201 arranged in an array, and a scan driving circuit 202, where each pixel unit 201 includes a plurality of sub-pixels 2011, each pixel unit 201 is correspondingly provided with at least one fingerprint identification unit 101, the scan lines G and the data lines S intersect to define a region where the sub-pixels 2011 are located, the sub-pixels 2011 in a same row are electrically connected to a same scan line G, and the scan driving circuit 202 is electrically connected to the scan lines G;
along the second direction Y, the plurality of sub-pixels 2011 form a plurality of sub-pixel rows 2011H, the plurality of fingerprint identification units 101 form a plurality of fingerprint identification unit rows 101H, and at least a part of the sub-pixel rows 2011H and the fingerprint identification unit rows 101H are arranged in a one-to-one correspondence manner;
the sub-pixels 2011 of the same sub-pixel row 2011H do not overlap with the active periods of the display phase T1 and the active periods of the fingerprint identification cells 101 of the fingerprint identification cell row 101H corresponding to the sub-pixel row 2011H in the fingerprint identification phase T2.
Specifically, the driving method of the present embodiment is applied to the display panel 000 including the fingerprint identification module 10 and the display module 20, the fingerprint identification module 10 includes a plurality of fingerprint scanning lines E arranged along the second direction Y and extending along the first direction X, a plurality of fingerprint signal lines F arranged along the first direction X and extending along the second direction Y, a plurality of fingerprint identification units 101 arranged in an array, and a fingerprint identification driving circuit 102, and both the fingerprint scanning lines E and the fingerprint signal lines F are electrically connected to the fingerprint identification unit 101, so that in the fingerprint identification stage T1, the fingerprint identification unit 101 completes fingerprint identification and detection by supplying a driving voltage signal to the fingerprint identification unit 30 through the fingerprint scanning lines E and the fingerprint signal lines F. Fingerprint scanning line E and fingerprint signal line F cross insulation inject a plurality of fingerprint identification unit 101 areas, a plurality of fingerprint identification unit 101 are the array and arrange promptly, same line fingerprint identification unit 101 is connected with same fingerprint scanning line E electricity, fingerprint identification drive circuit 102 is connected with fingerprint scanning line E electricity, be connected with every fingerprint scanning line E electricity through fingerprint identification drive circuit 102 promptly, make same fingerprint scanning line E provide drive scanning signal to same line fingerprint identification unit 101, realize the drive of fingerprint identification unit 101 array, accomplish fingerprint identification, then transmit fingerprint identification detection's result to fingerprint detection result receiving element (not in the figure meaning) through fingerprint signal line F.
In the display stage T2, the display module 20 includes a plurality of scan lines G arranged along the second direction Y and extending along the first direction X, a plurality of data lines S arranged along the first direction X and extending along the second direction Y, a plurality of pixel units 201 arranged in an array, and a scan driving circuit 202, where each pixel unit 201 includes a plurality of sub-pixels 2011, and both the scan lines G and the data lines S are electrically connected to the sub-pixels 2011, so that in the display stage T2, the sub-pixels 2011 on the display panel 000 complete the display operation by providing display driving voltage signals to the sub-pixels 2011 through the scan lines G and the data lines S. The scanning lines G and the data lines S intersect to define a region where the sub-pixels 2011 are located, that is, the sub-pixels 2011 are arranged in an array, the sub-pixels 2011 in the same row are electrically connected to the same scanning line G, the scanning driving circuit 202 is electrically connected to the scanning lines G, that is, the scanning driving circuit 202 is electrically connected to each scanning line G, so that the same scanning line G provides a display driving scanning signal to the sub-pixels 2011 in the same row, and a display data signal is provided to the data lines S through a driving chip (not shown), thereby completing the display operation.
In the second direction Y, the sub-pixels 2011 form a plurality of sub-pixel rows 2011H, the fingerprint identification units 101 form a plurality of fingerprint identification unit rows 101H, and at least a part of the sub-pixel rows 2011H and the fingerprint identification unit rows 101H are arranged in a one-to-one correspondence manner, so that the fingerprint identification unit rows 101H can be correspondingly arranged on at least a part of the sub-pixel rows 2011H, which is beneficial to realizing fingerprint identification and reducing the influence on the aperture ratio of the display panel. Optionally, each pixel unit 201 is correspondingly provided with at least one fingerprint identification unit 101, that is, one pixel unit 201 is correspondingly provided with at least one fingerprint identification unit 101, so that the fingerprint identification precision can be further improved, and the fingerprint detection effect of the whole panel can be improved.
Since the driving method of the present embodiment at least includes the fingerprint identification phase T1 and the display phase T2, and the operating time period of the fingerprint identification phase T1 coincides with the operating time period of the display phase T2, when the fingerprint identification unit 101 detects a fingerprint signal, the display phase T2 is performed simultaneously, that is, the fingerprint identification phase T1 and the display phase T2 are multiplexed in time, thereby facilitating the common implementation of the fingerprint identification and display operations of the display panel 000 and shortening the fingerprint scanning time. In addition, in this embodiment, the operating time period of the sub-pixels 2011 in the same sub-pixel row 2011H in the display phase T1 does not overlap with the operating time period of the fingerprint identification unit 101 in the fingerprint identification phase T2 of the fingerprint identification unit row 101H corresponding to the sub-pixel row 2011H, that is, although the operating time period of the fingerprint identification phase T1 overlaps with the operating time period of the display phase T2, the display operation and the fingerprint identification operation are simultaneously performed, but the same sub-pixel row 2011H and the fingerprint identification unit row 101H corresponding to the same sub-pixel row 2011H are not both performed with the display and fingerprint identification operations (spatially staggered), for example, when the first sub-pixel row 2011H1 shown in fig. 2 is displayed (i.e., the scan driving circuit 202 supplies the display driving signal to the first scan line G1 electrically connected to the first sub-pixel row H1), the first fingerprint identification unit row 101H1 corresponding to the same sub-pixel row is not performed with the fingerprint identification operation (i.e., the fingerprint identification driving circuit 102 does not supply the display driving signal to When the first fingerprint scanning line E1 electrically connected to the fingerprint identification cell line 101H1 provides a fingerprint identification driving signal), and the kth sub-pixel line 2011Hk is not displayed (i.e. the scan driving circuit 202 does not provide a display driving signal to the kth scanning line Gk electrically connected to the kth sub-pixel line 2011 Hk), the jth fingerprint identification cell line 101Hj corresponding to the kth sub-pixel line is performing fingerprint identification (i.e. the fingerprint identification driving circuit 102 provides a fingerprint identification driving signal to the jth fingerprint scanning line Ej electrically connected to the jth fingerprint identification cell line 101 Hj), where K is greater than or equal to 1 and less than or equal to K, K is the number of scanning lines G, J is greater than or equal to 1 and less than or equal to J, J is the number of fingerprint scanning lines E, and selectable K is equal to J. In this embodiment, the working time period of the fingerprint identification stage T1 may coincide with the working time period of the display stage T2, but the same sub-pixel row 2011H and the fingerprint identification unit row 101H corresponding to the same sub-pixel row are not both in displaying and fingerprint identification (staggered in space), so as to avoid the problem of crosstalk between the fingerprint signal line F and the data line S and between the scanning line G and the fingerprint scanning line E in signal transmission, so that when the fingerprint identification is completed, the interference noise generated when the fingerprint identification detection result is transmitted to the fingerprint detection result receiving unit through the fingerprint signal line F is reduced or eliminated as much as possible, and when the fingerprint identification and displaying of the display panel 000 are realized in common, the fingerprint identification effect is improved.
It should be noted that, in the present embodiment, a specific implementation manner that the operating time periods of the sub-pixels 2011 of the same sub-pixel row 2011H in the display phase T1 do not overlap with the operating time periods of the fingerprint identification units 101 of the fingerprint identification unit row 101H corresponding to the sub-pixel row 2011H in the fingerprint identification phase T2 is not specifically limited, as shown in fig. 2, when the first sub-pixel row 2011H1 is displayed, the first fingerprint identification unit row 101H1 corresponding to the first sub-pixel row 2011H1 is not performing the fingerprint identification operation, the jth fingerprint identification unit row 101HJ is performing the fingerprint identification operation, and the kth sub-pixel row 2011HK corresponding to the jth is not displaying, or other embodiments are possible, and the present embodiment is not limited.
It should be further noted that, in the embodiment, the structure of the display panel 000 related to the technical solution of the embodiment is only schematically illustrated, and it is understood that the display panel 000 may further include other structures, such as a liquid crystal layer, an array substrate, and a color film substrate, and the sub-pixel 2011 may further include a thin film transistor, a pixel electrode, a common electrode, and the like, and only the requirement that the display function of the display panel 000 can be achieved is met, and specifically, reference may be made to the description of the display panel structure in the prior art, and details of the embodiment are not described herein.
In some optional embodiments, please refer to fig. 1-4 in combination, fig. 4 is an equivalent circuit diagram of a fingerprint identification unit according to an embodiment of the present invention, in this embodiment, the fingerprint identification unit 101 includes a switch transistor 1011 and a photosensitive device 1012 electrically connected to each other, a gate of the switch transistor 1011 is electrically connected to a fingerprint scanning line E, a source of the switch transistor 1011 is electrically connected to a positive electrode of the photosensitive device 1012, and a drain of the switch transistor 1011 is electrically connected to a fingerprint signal line F. Optionally, photosensitive device 1012 includes any of a photosensitive transistor or a photodiode.
The embodiment further explains that the display panel can be a liquid crystal display panel integrating the fingerprint identification unit 101 in the screen, a non-opening area digging hole of each sub-pixel of the display panel 000 is provided with the fingerprint identification unit 101 for fingerprint identification, meanwhile, the sub-pixel opening area is provided for display, light emitted from a backlight module (not shown in the figure) is emitted out through the display panel 000, light reflected by a finger is incident on the fingerprint identification unit 101 to generate an electrical signal so as to detect fingerprint information, and a data line S for display and a fingerprint signal line F for fingerprint identification are separately arranged. Optionally, the equivalent circuit of the fingerprint identification unit 101 may be a passive detection circuit, that is, may be a photoelectric fingerprint identification unit, that is, includes a switch transistor 1011 and a photosensitive device 1012 electrically connected, a gate of the switch transistor 1011 is electrically connected to a fingerprint scan line E, a source of the switch transistor 1011 is electrically connected to a positive electrode of the photosensitive device 1012, a drain of the switch transistor 1011 is electrically connected to a fingerprint signal line F, the fingerprint scan line E is electrically connected to a gate of the switch transistor 1011, the fingerprint scan line E may be provided with a scan electric signal by the fingerprint identification driving circuit 102 to start the switch transistor 1011, so that the fingerprint identification unit 101 is turned on line by line in the second direction Y, the positive electrode of the photosensitive device 1012 is charged to a level corresponding to a reference voltage (preset) through the fingerprint signal line F, when the photosensitive device 1012 identifies that there is illumination, the reference voltage corresponding to the photosensitive device may change, that is, when a finger touches the screen, the light source is reflected when it irradiates the valleys and ridges of the fingerprint, and because the reflection angles of the valleys and ridges and the intensity of the reflected light are different, the light is projected onto the photosensor 1012, and the resistance of the photosensor 1012 is changed differently, so that the current is changed differently, and the current is transmitted to the fingerprint signal line F through the switching transistor 1011 in the on state, so that the fingerprint identification signal receiving unit (not shown) connected to the fingerprint signal line F identifies the valleys and ridges of the fingerprint.
It should be noted that the equivalent circuit of the fingerprint identification unit of this embodiment may also be an active detection circuit, and the external driving signal is loaded on the finger to enhance the charges on the surface of the finger, so that the fingerprint identification unit receives the electric field signal and amplifies the signal, and the valley line and the ridge line of the fingerprint are reproduced according to the unevenness of the fingerprint and the further inconsistency of the electric field induced by the fingerprint identification unit.
In some optional embodiments, please refer to fig. 1-3, in this embodiment, the scan line G connected to the sub-pixels 2011 of the same sub-pixel row 2011H is a first scan line Gk, and the fingerprint scan line E connected to the fingerprint identification units 101 of the fingerprint identification unit row 101H corresponding to the sub-pixel row 2011H is a first fingerprint scan line Ej;
at the same working time t, the effective pulses of the first scanning line Gk and the first fingerprint scanning line Ej are not overlapped.
This embodiment further explains that the scan line G connected to the sub-pixels 2011 of the same sub-pixel row 2011H is the first scan line Gk, and the fingerprint scan line E connected to the fingerprint identification units 101 of the fingerprint identification unit row 101H corresponding to the sub-pixel row 2011H is the first fingerprint scan line Ej, for example, in fig. 2, the scan line G connected to the sub-pixels 2011 of the first sub-pixel row 2011H1 is the first scan line G1, the fingerprint scan line E connected to the fingerprint identification units 101 of the first fingerprint identification unit row 101H1 corresponding to the first sub-pixel row 2011H1 is the first fingerprint scan line E1, the scan line G connected to the sub-pixels 2011 of the second sub-pixel row H2 is the second first scan line G2, and the fingerprint identification units 101H2 corresponding to the second sub-pixel row 2011H2 is the second fingerprint scan line E2, by analogy, the scan line G connected to the sub-pixel 2011Hk is the kth first scan line Gk, and the fingerprint scan line E connected to the fingerprint identification unit 101 of the jth fingerprint identification unit row 101Hj corresponding to the kth sub-pixel row 2011Hk is the jth first fingerprint scan line Ej, and further, in this embodiment, the effective pulses of the first scan line Gk and the first fingerprint scan line Ej are not overlapped at the same operation time T, so that the first fingerprint identification unit row 101H1 corresponding to the first sub-pixel row 2011H1 is not performing fingerprint identification operation when the first sub-pixel row 2011H1 is displayed, and the jth fingerprint identification unit row 101Hj corresponding to the kth sub-pixel row 2011Hk is not displayed, while the operation time period of the fingerprint identification stage T1 is coincident with the operation time period of the display stage T2, however, the same sub-pixel row 2011H and the fingerprint identification unit row 101H corresponding to the same sub-pixel row are not both in displaying and fingerprint identification work (staggered in space), so that the problem of crosstalk of transmission signals between the fingerprint signal line F and the data line S and between the scanning line G and the fingerprint scanning line E is avoided, when fingerprint identification is completed, interference noise between the data line S and the fingerprint signal line F and interference noise between the scanning line G and the fingerprint scanning line E are reduced or eliminated as much as possible, and when the fingerprint identification and display work of the display panel 000 is realized in a shared mode, the fingerprint identification effect is improved.
In some alternative embodiments, with continued reference to fig. 1 and fig. 2, in this embodiment, the second direction Y includes a first sub-direction Y1 and a second sub-direction Y2, which are opposite to each other, and along the first sub-direction Y1, the fingerprint identification driving circuit 102 sequentially provides a fingerprint scanning signal to each fingerprint scanning line E; along the second sub-direction Y2, the scan driving circuit 202 sequentially supplies a scan signal to each scan line G.
This embodiment further explains that the second direction Y includes a first sub-direction Y1 and a second sub-direction Y2 which are opposite to each other, so that the driving sequence of the fingerprint scan lines E is toward the second sub-direction Y2, the fingerprint identification driving circuit 102 sequentially provides the fingerprint scan signal to each fingerprint scan line E, and the driving sequence of the scan lines G is just opposite to the driving sequence of the fingerprint scan lines E, that is, the driving sequence of the scan lines G is toward the first sub-direction Y1, the scanning driving circuit 202 sequentially provides the scan signal to each scan line G, so that the working time period of the fingerprint identification stage T1 is overlapped with the working time period of the display stage T2, but the same sub-pixel row 2011H and the fingerprint identification unit row 101H corresponding thereto are not both performing display and fingerprint identification works (spatially staggered), thereby avoiding the problem of signal crosstalk between the fingerprint signal lines F and the data lines S, when the fingerprint identification is finished, the interference noise between the data line S and the fingerprint signal line F is reduced or eliminated as much as possible, and the fingerprint identification effect is improved while the fingerprint identification and display work of the display panel 000 is realized.
It should be noted that the driving sequence of the scan lines G may be defined as a forward scan, and the driving sequence of the fingerprint scan lines E may be defined as a reverse scan, or the driving sequence of the fingerprint scan lines E may be defined as a forward scan, and the driving sequence of the scan lines G may be defined as a reverse scan, which is not specifically limited in this embodiment.
In some optional embodiments, please continue to refer to fig. 1, in the present embodiment, the display panel 000 includes a display area AA and a non-display area NA disposed around the display area AA;
the pixel unit 201 and the fingerprint identification unit 101 are located in the display area AA, and the fingerprint identification driving circuit 102 and the scanning driving circuit 202 are located in the non-display area NA.
Specifically, in fig. 1 of the present embodiment, the scan driving circuit 202 and the fingerprint identification driving circuit 102 are illustrated as being located in the non-display area NA of the display panel, so that the fingerprint identification unit 101 can be integrated in the range of the on-screen display area AA of the display panel 000, which is beneficial for the display panel 000 to develop towards the full-screen direction. It is understood that the scan driving circuit 202 and the fingerprint identification driving circuit 102 may be located in the non-display area NA range on two opposite sides of the display area AA (as shown in fig. 1), or may be located in the non-display area NA range on the same side of the display area AA (as shown in fig. 5, fig. 5 is a schematic plane structure diagram of another display panel according to an embodiment of the present invention), and the embodiment is not particularly limited.
In some optional embodiments, please refer to fig. 6, fig. 6 is a schematic plane structure diagram of another display panel according to an embodiment of the present invention, in this embodiment, the fingerprint identification driving circuit 102 includes a first fingerprint identification driving circuit 1021 and a second fingerprint identification driving circuit 1022, and along the first direction X, the first fingerprint identification driving circuit 1021 and the second fingerprint identification driving circuit 1022 are respectively located in the non-display area NA on two opposite sides of the display area AA;
the first fingerprint identification driving circuit 1021 comprises a plurality of cascaded stages of first shift registers 10211, the second fingerprint identification driving circuit 1022 comprises a plurality of cascaded stages of second shift registers 10221, and the number of the first shift registers 10211 in the first fingerprint identification driving circuit 1021 is equal to the number of the second shift registers 10221 in the second fingerprint identification driving circuit 1022;
an output end of the nth stage first shift register 10211N and an output end of the nth stage second shift register 10221N are connected to the same fingerprint scanning line E, where N is an integer, N is greater than or equal to 1 and less than or equal to N, and N is the number of the first shift registers 10211 in the first fingerprint identification driving circuit 1021. Optionally, N is equal to J, one end of each of the first fingerprint scanning line E1 to the jth fingerprint scanning line EJ is electrically connected to the first stage first shift register 102111 to the nth stage first shift register 10211N in a one-to-one correspondence manner, and the other end of each of the first fingerprint scanning line E1 to the jth fingerprint scanning line EJ is electrically connected to the first stage second shift register 102211 to the nth stage second shift register 10221N in a one-to-one correspondence manner.
The present embodiment further explains that the fingerprint identification driving circuit 102 includes a first fingerprint identification driving circuit 1021 and a second fingerprint identification driving circuit 1022, and along the first direction X, the first fingerprint identification driving circuit 1021 and the second fingerprint identification driving circuit 1022 are respectively located in the non-display area NA on the two opposite sides of the display area AA, that is, the fingerprint identification driving circuit 102 for providing the scanning driving signal to each fingerprint scanning line E includes the first fingerprint identification driving circuit 1021 and the second fingerprint identification driving circuit 1022 located in the non-display area NA on the two opposite sides of the display area AA, and the output terminal of the nth stage first shift register 10211n and the output terminal of the nth stage second shift register 10221n are connected to the same fingerprint scanning line E, that is, the two ends of the same fingerprint scanning line E are electrically connected to the output terminal of the first stage shift register, the fingerprint scanning line E adopts a bilateral simultaneous driving mode, the first fingerprint identification driving circuit 1021 and the second fingerprint identification driving circuit 1022 provide scanning driving signals to the fingerprint scanning line E at two ends of the fingerprint scanning line E at the same time, so that the charging time of fingerprint scanning driving can be reduced, and the fingerprint scanning driving efficiency can be improved.
In some optional embodiments, please refer to fig. 7, fig. 7 is a schematic plane structure diagram of another display panel according to an embodiment of the present invention, in which the scan driving circuit 202 includes a first scan driving circuit 2021 and a second scan driving circuit 2022, and the first scan driving circuit 2021 and the second scan driving circuit 2022 are respectively located in the non-display area NA range on two opposite sides of the display area AA along the first direction X;
the first scan driver circuit 2021 includes a plurality of stages of third shift registers 20211 arranged in cascade, the second scan driver circuit 2022 includes a plurality of stages of fourth shift registers 20221 arranged in cascade, and the number of the third shift registers 20211 in the first scan driver circuit 2021 is equal to the number of the fourth shift registers 20221 in the second scan driver circuit 2022;
the output end of the mth third shift register 20211M and the output end of the mth fourth shift register 20221M are connected to the same scan line G, where M is an integer, M is greater than or equal to 1 and less than or equal to M, and M is the number of the third shift registers 20211 in the first scan driver circuit 2021. Optionally, the values of M and K are equal, one end of each of the first scanning line G1 to the kth scanning line GK is electrically connected to the first-stage third shift register 202111 to the mth-stage third shift register 20211M in a one-to-one correspondence manner, and the other end of each of the first scanning line G1 to the kth fingerprint scanning line GK is electrically connected to the first-stage fourth shift register 202211 to the mth-stage fourth shift register 20221M in a one-to-one correspondence manner.
This embodiment further explains that the scan driving circuit 202 includes a first scan driving circuit 2021 and a second scan driving circuit 2022, and the first scan driving circuit 2021 and the second scan driving circuit 2022 are respectively located in the non-display area NA at two opposite sides of the display area AA along the first direction X, that is, the scan driving circuit 202 for providing scan driving signals to each scan line G includes a first scan driving circuit 2021 and a second scan driving circuit 2022 located in the non-display area NA at two opposite sides of the display area AA, and the output terminal of the m-th stage third shift register 20211m and the output terminal of the m-th stage fourth shift register 20221m are connected to the same scan line G, that is, both ends of the same scan line G are electrically connected to the output terminal of the one-stage shift register, the display scan line G employs a bilateral simultaneous driving mode, the first scan driving circuit 2021 and the second scan driving circuit 2022 provide display scan driving signals to the scan line G at both ends of the same time, therefore, the charging time of the display scanning drive can be reduced, and the display drive efficiency is improved.
It should be noted that the driving methods of the fingerprint scan lines E and the scan lines G of this embodiment are not limited to the driving methods of the above embodiments, but may be all interlace driving methods (for example, the driving method of the scan lines G using interlace driving is taken as an example for explanation, as shown in fig. 8, fig. 8 is a schematic plane structure diagram of another display panel provided by this embodiment of the invention (for clarity, fig. 8 only shows a schematic structure diagram related to the interlace driving method of the scan lines G, it can be understood that the fingerprint scan lines E may also be driven and scanned in this way), the first scan driving circuit 2021 of the display panel 000 includes a plurality of cascaded fifth shift registers 20213, the output end of the fifth shift register 20213 is electrically connected to the scan lines G of the odd number, the second scan driving circuit 2022 includes a plurality of cascaded sixth shift registers 20224, the output end of the sixth shift register 20224 is electrically connected to the even scan lines G, wherein the odd scan lines are numbered 1, 2, 3, and 4 … K … K sequentially along the direction of the scan lines, so that the odd scan lines are odd scan lines, and the even scan lines are even scan lines, and the display panel adopts the staggered driving manner, so that the signals of the scan lines G driven by the first scan driving circuit 2021 and the second scan driving circuit 2022 at two sides of the display area AA of the display panel do not interfere with each other, and are staggered in time, thereby achieving the purpose of sequential driving.
In some optional embodiments, please refer to fig. 1 and fig. 2 in combination, the driving method of the display panel 000 further includes a touch stage, and an operating time period of the touch stage does not coincide with an operating time period of the fingerprint identification stage T1. Optionally, the display panel 000 further includes a plurality of touch units (not shown in the figure) arranged in an array, one touch unit is correspondingly provided with a plurality of pixel units 201, each touch unit includes a touch electrode block (not shown in the figure), each touch electrode block (not shown in the figure) is connected to a touch signal line (not shown in the figure), the touch signal line is connected to an external driving circuit, and the external driving circuit can be integrated on the same driving chip with a fingerprint detection result receiving unit electrically connected to the fingerprint identification unit 101 and a data line driving unit electrically connected to the sub-pixel 2011; in the touch control stage, an external drive circuit provides a touch control detection signal for a touch control electrode block of a touch control unit through a touch control signal line, when a finger touches a display panel, a detection capacitor is formed between the finger and the touch control electrode block to cause the numerical value change of the detection capacitor, and the external drive circuit receives the detection signal of the detection capacitor to realize the self-capacitance touch control detection function. And the working time quantum of touch-control stage and the working time quantum of fingerprint identification stage T1 do not coincide, stagger touch-control work and fingerprint identification work in time to produce when can avoiding transmitting the detected signal between touch-control signal line and the fingerprint signal line F and disturb, be favorable to promoting touch-control effect and fingerprint detection effect.
In some optional embodiments, please refer to fig. 9, where fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 111 according to the embodiment includes the display panel 000 according to the embodiment, and the driving method of the display panel according to the embodiment is adopted. The embodiment of fig. 9 only takes a mobile phone as an example to describe the display device 111, and it should be understood that the display device 111 provided in the embodiment of the present invention may be other display devices 111 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 111 provided in the embodiment of the present invention has the beneficial effect of the driving method of the display panel 000 provided in the embodiment of the present invention, and specific descriptions of the driving method of the display panel 000 in the above embodiments may be specifically referred to, and the detailed description of the embodiment is omitted here.
As can be seen from the foregoing embodiments, the driving method of the display panel and the display device provided in the present invention at least achieve the following advantages:
the working time periods of the sub-pixels of the same sub-pixel row in the display stage and the working time periods of the fingerprint identification units of the fingerprint identification unit row corresponding to the sub-pixel row in the fingerprint identification stage are not overlapped, namely although the working time periods of the fingerprint identification stage are overlapped with the working time periods of the display stage, the display work and the fingerprint identification work are simultaneously carried out the scanning work, but the same sub-pixel row and the fingerprint identification unit row correspondingly arranged with the sub-pixel row are not carried out the display work and the fingerprint identification work (staggered in space), thereby avoiding the problem of signal transmission crosstalk between a fingerprint signal line and a data line and between a scanning line and a fingerprint scanning line, reducing or eliminating the interference noise of the result of fingerprint identification detection transmitted to a fingerprint detection result receiving unit through the fingerprint signal line as much as possible when the fingerprint identification is finished, when the fingerprint identification and the display work of the display panel are realized in a shared mode, the fingerprint identification effect is 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 (10)
1. The driving method of the display panel is characterized by at least comprising a fingerprint identification stage and a display stage, wherein the working time period of the fingerprint identification stage is coincident with the working time period of the display stage;
the display panel comprises a fingerprint identification module and a display module;
the fingerprint identification module comprises a plurality of fingerprint scanning lines which are distributed along a second direction and extend along a first direction, a plurality of fingerprint signal lines which are distributed along the first direction and extend along the second direction, a plurality of fingerprint identification units which are distributed in an array manner, and a fingerprint identification driving circuit, wherein the fingerprint scanning lines and the fingerprint signal lines are crossed and insulated to define the areas where the fingerprint identification units are located, the fingerprint identification units on the same row are electrically connected with the same fingerprint scanning line, and the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line; wherein the first direction intersects the second direction;
the display module comprises a plurality of scanning lines which are arranged along the second direction and extend along the first direction, a plurality of data lines which are arranged along the first direction and extend along the second direction, a plurality of pixel units which are arranged in an array, and a scanning driving circuit, wherein each pixel unit comprises a plurality of sub-pixels, at least one fingerprint identification unit is correspondingly arranged on each pixel unit, the scanning lines and the data lines are crossed to define an area where the sub-pixels are located, the sub-pixels in the same row are electrically connected with the same scanning line, and the scanning driving circuit is electrically connected with the scanning lines;
along the second direction, a plurality of sub-pixels form a plurality of sub-pixel rows, a plurality of fingerprint identification units form a plurality of fingerprint identification unit rows, and at least part of the sub-pixel rows and the fingerprint identification unit rows are arranged in a one-to-one correspondence mode;
the working time periods of the sub-pixels of the same sub-pixel row in the display stage and the working time periods of the fingerprint identification units of the fingerprint identification unit row corresponding to the sub-pixel row in the display stage are not overlapped.
2. The method for driving a display panel according to claim 1,
the scanning line connected with the sub-pixels of the same sub-pixel row is a first scanning line, and the fingerprint scanning line connected with the fingerprint identification units of the fingerprint identification unit row corresponding to the sub-pixel row of the same sub-pixel row is a first fingerprint scanning line;
at the same working moment, the effective pulses of the first scanning line and the first fingerprint scanning line are not overlapped.
3. The method for driving a display panel according to claim 1,
the second direction comprises a first sub-direction and a second sub-direction which are opposite, and along the first sub-direction, the fingerprint identification driving circuit sequentially provides a fingerprint scanning signal for each fingerprint scanning line; and along the second sub-direction, the scanning driving circuit sequentially provides scanning signals to each scanning line.
4. The method for driving a display panel according to claim 1, wherein the display panel includes a display region and a non-display region provided around the display region;
the pixel unit and the fingerprint identification unit are located in the display area, and the fingerprint identification driving circuit and the scanning driving circuit are located in the non-display area.
5. The method according to claim 4, wherein the fingerprint identification driving circuit comprises a first fingerprint identification driving circuit and a second fingerprint identification driving circuit, and the first fingerprint identification driving circuit and the second fingerprint identification driving circuit are respectively located in the non-display areas on two opposite sides of the display area along the first direction;
the first fingerprint identification driving circuit comprises a plurality of cascaded first shift registers, the second fingerprint identification driving circuit comprises a plurality of cascaded second shift registers, and the number of the first shift registers in the first fingerprint identification driving circuit is equal to the number of the second shift registers in the second fingerprint identification driving circuit;
the output end of the nth stage of the first shift register and the output end of the nth stage of the second shift register are connected with the same fingerprint scanning line, wherein N is an integer, N is more than or equal to 1 and less than or equal to N, and N is the number of the first shift registers in the first fingerprint identification driving circuit.
6. The method according to claim 4, wherein the scan driving circuit comprises a first scan driving circuit and a second scan driving circuit, and the first scan driving circuit and the second scan driving circuit are respectively located in the non-display region at two opposite sides of the display region along the first direction;
the first scanning driving circuit comprises a plurality of cascaded third shift registers, the second scanning driving circuit comprises a plurality of cascaded fourth shift registers, and the number of the third shift registers in the first scanning driving circuit is equal to the number of the fourth shift registers in the second scanning driving circuit;
the output end of the mth stage of the third shift register and the output end of the mth stage of the fourth shift register are connected with the same scanning line, wherein M is an integer, M is more than or equal to 1 and less than or equal to M, and M is the number of the third shift registers in the first scanning driving circuit.
7. The method for driving a display panel according to claim 1, wherein the fingerprint identification unit includes a switching transistor and a photosensor electrically connected to each other, a gate of the switching transistor is electrically connected to the fingerprint scanning line, a source of the switching transistor is electrically connected to a positive electrode of the photosensor, and a drain of the switching transistor is electrically connected to the fingerprint signal line.
8. The method for driving a display panel according to claim 7, wherein the photosensor comprises any one of a phototransistor or a photodiode.
9. The method for driving a display panel according to claim 1, further comprising a touch stage, wherein an operating time period of the touch stage does not coincide with an operating time period of the fingerprint recognition stage.
10. A display device comprising a display panel, wherein a driving method of the display panel comprises the driving method of any one of claims 1 to 9.
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