CN110991420A

CN110991420A - Fingerprint identification method of display panel, display panel and display device

Info

Publication number: CN110991420A
Application number: CN201911340060.7A
Authority: CN
Inventors: 林春荣; 陈国照
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-10
Anticipated expiration: 2039-12-23
Also published as: CN110991420B

Abstract

The invention discloses a fingerprint identification method of a display panel, the display panel and a display device, wherein the display panel comprises a fingerprint identification area; the fingerprint identification area comprises N sub-fingerprint identification areas; each sub-fingerprint identification area comprises M detection areas; the fingerprint identification method comprises the following steps: in a scanning period, each fingerprint identification unit carries out fingerprint identification; the scanning cycle includes N frame scanning periods; in the ith frame scanning time period, driving the light emitting units of the M detection areas of the ith sub-fingerprint identification area to emit light, and driving the fingerprint identification units of the M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection; m detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area are arranged in a one-to-one correspondence mode; the corresponding detection areas in the N sub-fingerprint identification areas are sequentially arranged along the first direction. The technical scheme provided by the invention can solve the problem that the fingerprint identification efficiency is influenced by more stray light and crosstalk in the existing fingerprint identification process.

Description

Fingerprint identification method of display panel, display panel and display device

Technical Field

The invention relates to the technical field of fingerprint identification, in particular to a fingerprint identification method of a display panel, the display panel and a display device.

Background

With the vigorous development of the full-screen mobile phone market, the application of the finger print technology under the screen gradually becomes the mainstream standard configuration of the industry. The underscreen fingerprints can be roughly divided into: capacitive fingerprint identification, optical type fingerprint identification and ultrasonic wave formula fingerprint identification three kinds, wherein, optical type fingerprint identification has the high advantage of sensitivity, and in order to strengthen fingerprint identification's accuracy, very most electronic equipment adopts optical type fingerprint identification to realize fingerprint detection under the screen.

In the fingerprint identification process, the pixel district in fingerprint identification district lights and provides the emergent light, the emergent light is reflected behind the touch main part, reflect and carry out fingerprint identification to the fingerprint identification sensor, and reduce stray light through constructing the collimation hole, it is crosstalked to reduce the fingerprint light path, but because liquid crystal display panel's rete is more, the collimation hole sets up the degree of difficulty higher, and the width of the line valley of fingerprint and line ridge is all less, thereby produce easily between each other and crosstalk, influence the fingerprint formation of image, so the collimation hole is difficult to stop stray light sum completely and crosstalk.

Disclosure of Invention

The embodiment of the invention provides a fingerprint identification method of a display panel, the display panel and a display device, and aims to solve the problem that stray light and crosstalk are more in the existing fingerprint identification process to influence fingerprint identification efficiency.

In a first aspect, an embodiment of the present invention provides a fingerprint identification method for a display panel, where the display panel includes a fingerprint identification area and a non-fingerprint identification area, the fingerprint identification area and the non-fingerprint identification area are both provided with light emitting units arranged in an array, the fingerprint identification area is further provided with a plurality of fingerprint identification units,

the fingerprint identification area comprises N sub-fingerprint identification areas; each sub-fingerprint identification area comprises M detection areas; n is not less than 2 and is an integer; m is a positive integer;

the fingerprint identification method comprises the following steps:

in a scanning period, each fingerprint identification unit carries out fingerprint identification detection; the scan cycle comprises N frame scan periods; the frame scanning time period is the interval time from the scanning start line of one frame of picture of the display panel to the scanning start line of the next frame of picture;

in the ith frame scanning time period, driving the light emitting units of the M detection areas of the ith sub-fingerprint identification area to emit light, and driving the plurality of fingerprint identification units of the M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection; i is more than or equal to 1 and less than or equal to M and is an integer;

m detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area are arranged in a one-to-one correspondence mode; j is more than or equal to 1 and less than or equal to N-1 and is an integer; the detection areas corresponding to the N sub-fingerprint identification areas are sequentially arranged along a first direction.

In a second aspect, an embodiment of the present invention further provides a display panel, where the display panel includes a fingerprint identification area and a non-fingerprint identification area, where the fingerprint identification area and the non-fingerprint identification area are both provided with light emitting units arranged in an array, and the fingerprint identification area is further provided with a plurality of fingerprint identification units; the fingerprint identification area comprises N sub-fingerprint identification areas; each sub-fingerprint identification area comprises M detection areas; n is not less than 2 and is an integer; m is a positive integer;

the display panel further comprises a control unit for: in a scanning period, each fingerprint identification unit carries out fingerprint identification detection; the scan cycle comprises N frame scan periods; the frame scanning time period is the interval time from the scanning start line of one frame of picture of the display panel to the scanning start line of the next frame of picture; in the ith frame scanning time period, driving the light emitting units of the M detection areas of the ith sub-fingerprint identification area to emit light, and driving the plurality of fingerprint identification units of the M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection; i is more than or equal to 1 and less than or equal to M and is an integer; m detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area are arranged in a one-to-one correspondence mode; j is more than or equal to 1 and less than or equal to N-1 and is an integer; the detection areas corresponding to the N sub-fingerprint identification areas are sequentially arranged along a first direction.

In a third aspect, an embodiment of the present invention further provides a display device including the display panel provided in any embodiment of the present invention.

In the invention, the display panel comprises a fingerprint identification area, the fingerprint identification area is provided with a plurality of fingerprint identification units, the fingerprint identification area is divided into N sub-fingerprint identification areas in the fingerprint identification process, each sub-fingerprint identification area is divided into M detection areas, the fingerprint identification detection of the whole fingerprint identification area is completed in one scanning period, each scanning period comprises N frame scanning time periods, the light-emitting units of the M detection areas in the ith sub-fingerprint identification area are driven to emit light in the ith frame scanning time period, and the fingerprint identification units in the sub-fingerprint identification areas are driven to carry out the fingerprint detection. In the embodiment, only one light-emitting unit in one sub-fingerprint identification area is lightened in each frame scanning time period, and only the fingerprint identification unit in the sub-fingerprint identification area is controlled to carry out fingerprint identification, so that stray light generated by long distance between the light-emitting unit and the fingerprint identification unit is avoided, fingerprint light path crosstalk is reduced, and the situation that the fingerprint imaging is influenced by the crosstalk between the valleys and the ridges is prevented. And, to M detection areas in every sub-fingerprint identification district, it is with M detection area one-to-one in other sub-pixel identification districts, and the detection area that corresponds each other among the N sub-fingerprint identification districts arranges along the first direction in proper order, make each detection area can cover whole fingerprint identification district in order, improve the fingerprint identification rate of accuracy, realize that the subregion lights the testing light source, and the subregion is put the fingerprint and is detected, avoid stray light and the light of crosstalking among the fingerprint identification process, improve fingerprint identification efficiency.

Drawings

Fig. 1 is a flowchart illustrating a fingerprint identification method for a display panel according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a fingerprint identification area according to an embodiment of the present invention;

FIG. 4 is a schematic time-line diagram of a scanning cycle according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another fingerprint identification area provided in an embodiment of the present invention;

FIG. 6 is a flowchart illustrating another fingerprint identification method for a display panel according to an embodiment of the present invention;

FIG. 7 is a schematic optical path diagram of a fingerprint identification process provided by an embodiment of the present invention;

FIG. 8 is a view of the structure of any one of the annular test zones of FIG. 3;

FIG. 9 is a schematic diagram of another fingerprint identification area provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of another fingerprint identification area provided by an embodiment of the present invention;

FIG. 11 is a schematic diagram of another fingerprint identification area provided by an embodiment of the present invention;

FIG. 12 is a schematic diagram of another fingerprint identification area provided by an embodiment of the present invention;

FIG. 13 is a flowchart illustrating another fingerprint identification method for a display panel according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of another fingerprint identification area provided by an embodiment of the present invention;

FIG. 15 is a flowchart illustrating another fingerprint identification method for a display panel according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

An embodiment of the present invention provides a fingerprint identification method for a display panel, as shown in fig. 1 and fig. 2, fig. 1 is a schematic flow diagram of the fingerprint identification method for the display panel provided by the embodiment of the present invention, and fig. 2 is a schematic structural diagram of the display panel provided by the embodiment of the present invention, as shown in fig. 2, in this embodiment, the display panel includes a fingerprint identification area 11 and a non-fingerprint identification area 12, the fingerprint identification area 11 and the non-fingerprint identification area 12 are both provided with light emitting units 13 arranged in an array, the fingerprint identification area 11 is further provided with a plurality of fingerprint identification units 14, and the fingerprint identification area 11 includes N sub-fingerprint identification areas 111; each sub-fingerprint identification zone 111 includes M detection zones 1111; n is not less than 2 and is an integer; m is a positive integer;

referring to fig. 1, the fingerprint identification method of the display panel includes the steps of:

step S110, in a scanning period, each fingerprint identification unit carries out fingerprint identification detection; the scanning cycle includes N frame scanning periods; the frame scanning time period is an interval time from the scanning start line of one frame of picture of the display panel to the scanning start line of the next frame of picture.

Referring to fig. 1, the display region of the display panel is provided with light emitting units 13 arranged in an array, and the light emitting units 13 generally include a plurality of light emitting units of different colors, thereby enabling image display of the display panel. The display area of the display panel includes a fingerprint identification area 11 and a non-fingerprint identification area 12, the fingerprint identification area 11 may be a circle, an ellipse, a rectangle, or other regular or irregular shapes, and the present embodiment does not limit the specific shape of the fingerprint identification area 11. The proportion of the display area occupied by the fingerprint identification area 11 can be set as required, and optionally, the whole display area can be the fingerprint identification area 11. The fingerprint identification area 11 is further provided with a plurality of fingerprint identification units 14, and the fingerprint identification units 14 are arranged in the gap area between the adjacent light emitting units 13.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a fingerprint identification area according to an embodiment of the present invention, and fig. 3 illustrates a circular fingerprint identification area 11 as an example, in this embodiment, the fingerprint identification area 11 may be divided into N sub-fingerprint identification areas 111, where the number of the sub-fingerprint identification areas 111 is at least two, that is, N is greater than or equal to 2 and is a positive number, each sub-fingerprint identification area 111 may include M detection areas 1111, and each sub-fingerprint identification area 111 may include at least one detection area 1111, that is, M is greater than or equal to 1 and is a positive number. It should be noted that the M detection regions 1111 of each sub-fingerprint identification region 111 may not be adjacently disposed, i.e. the M detection regions 1111 of the sub-fingerprint identification region 111 may be dispersedly disposed in the fingerprint identification region 11.

Referring to fig. 3, fig. 3 illustrates an example where N is 4 and M is 2, where fig. 3 includes 4 sub-fingerprint identification areas 111, and each sub-fingerprint identification area 111 includes 2 detection areas 1111. Specifically, the fingerprint identification area 11 includes a sub-fingerprint identification area 111-1, a sub-fingerprint identification area 111-2, a sub-fingerprint identification area 111-3, and a sub-fingerprint identification area 111-4, wherein the sub-fingerprint identification area 111-1 includes a detection area 1111-1 and a detection area 1111-2, the sub-fingerprint identification area 111-2 includes a detection area 1111-3 and a detection area 1111-4, the sub-fingerprint identification area 111-3 includes a detection area 1111-5 and a detection area 1111-6, and the sub-fingerprint identification area 111-4 includes a detection area 1111-7 and a detection area 1111-8. Wherein, for the sub-fingerprint identification area 111-1, the sub-fingerprint identification area 111-2 and the sub-fingerprint identification area 111-3, the two detection areas 1111 of each sub-fingerprint identification area 111 are not adjacent to each other, and the detection areas 1111-7 and 1111-7 in the sub-fingerprint identification area 111-4 are adjacently disposed.

Thus through distinguishing 11 subregion to fingerprint identification district 11 and carrying out the timesharing to fingerprint identification district 11 and detect at display panel's fingerprint identification in-process to reduce fingerprint identification's stray light and crosstalk light, improve the fingerprint identification precision. In this embodiment, one frame scan period cannot detect the whole fingerprint identification area 11, and a plurality of frame scan periods are required to make the detection area cover the whole fingerprint identification area 11. The N frame scanning periods constitute a scanning cycle, and in a scanning cycle, each fingerprint identification unit in the entire fingerprint identification area 11 can complete fingerprint identification detection.

Step S120, in the ith frame scanning time period, driving the light-emitting units of the M detection areas of the ith sub-fingerprint identification area to emit light, and driving the plurality of fingerprint identification units of the M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection; i is more than or equal to 1 and less than or equal to M and is an integer.

One scanning period comprises N frame scanning time periods, the frame scanning time periods correspond to the sub-fingerprint identification areas one by one, and the light-emitting units of the M detection areas of one sub-fingerprint identification area are only driven to emit light in each frame scanning time period, so that the fingerprint identification detection in a time-sharing partition mode is realized. Specifically, in the ith frame scanning time quantum in N scanning periods, the luminescence unit of the M detection area in the ith sub-fingerprint identification district in the drive N sub-fingerprint identification districts sends light, provide the light source for fingerprint identification, and a plurality of fingerprint identification units of the M detection areas in this sub-fingerprint identification district of drive carry out fingerprint detection, thereby accomplish the fingerprint detection in this sub-fingerprint identification district, only light the luminescence unit in this sub-fingerprint identification district, and only carry out fingerprint identification through the fingerprint identification unit in this sub-fingerprint identification district and detect, prevent that luminescence unit and fingerprint identification unit distance from producing stray light far away, effectively improve the precision that fingerprint identification detected. And after N frame scanning time periods, the N sub-fingerprint identification areas finish the fingerprint identification process. Wherein i is an integer of 1 or more and M or less.

S130, setting M detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area in a one-to-one correspondence manner; j is more than or equal to 1 and less than or equal to N-1 and is an integer; the detection areas corresponding to the N sub-fingerprint identification areas are sequentially arranged along a first direction.

It is known that each sub-fingerprint identification area comprises M detection areas, wherein the M detection areas of each sub-fingerprint identification area are arranged in a one-to-one correspondence manner with the M detection areas of any other sub-fingerprint identification area, namely, the M detection areas of the j +1 th sub-fingerprint identification area and the M detection areas of the j th sub-fingerprint identification area are arranged in a one-to-one correspondence manner, and j is greater than or equal to 1 and less than or equal to N-1 and is an integer.

And the detection regions corresponding to the N sub-fingerprint identification regions are sequentially arranged along the first direction X, with reference to fig. 3, the detection region 1111-1 in the 1 st sub-fingerprint identification region 111-1, the detection region 1111-3 in the 2 nd sub-fingerprint identification region 111-2, the detection region 1111-5 in the 3 rd sub-fingerprint identification region 111-3 and the detection region 1111-7 in the 4 th sub-fingerprint identification region 111-4 are in a corresponding relationship, the first direction X in fig. 3 is a direction of a straight line connecting the edge of the circular fingerprint identification region and the center of the circle, as can be seen from fig. 3, the detection regions 1111-1, 1111-3, 1111-5 and 1111-7 are sequentially arranged along the first direction X, and similarly, the detection regions 1111-2, 1111-4, 1111-6 and 1111-8 are sequentially arranged along the first direction X, each detection zone that corresponds in each sub-fingerprint identification district arranges along specific direction in proper order, is favorable to realizing in order that the detection zone covers whole fingerprint identification district comprehensively for through a scanning cycle, can acquire the identification image in complete, accurate fingerprint identification district.

In the embodiment of the invention, the display panel comprises a fingerprint identification area, the fingerprint identification area is provided with a plurality of fingerprint identification units, the fingerprint identification area is divided into N sub-fingerprint identification areas in the fingerprint identification process, each sub-fingerprint identification area is divided into M detection areas, the fingerprint identification detection of the whole fingerprint identification area is completed in one scanning period, each scanning period comprises N frame scanning time periods, the light-emitting units of the M detection areas in the ith sub-fingerprint identification area are driven to emit light in the ith frame scanning time period, and the fingerprint identification units in the sub-fingerprint identification areas are driven to perform fingerprint detection. In the embodiment, only one light-emitting unit in one sub-fingerprint identification area is lightened in each frame scanning time period, and only the fingerprint identification unit in the sub-fingerprint identification area is controlled to carry out fingerprint identification, so that stray light generated by long distance between the light-emitting unit and the fingerprint identification unit is avoided, fingerprint light path crosstalk is reduced, and the situation that the fingerprint imaging is influenced by the crosstalk between the valleys and the ridges is prevented. And, to M detection areas in every sub-fingerprint identification district, it is with M detection area one-to-one in other sub-pixel identification districts, and the detection area that corresponds each other among the N sub-fingerprint identification districts arranges along the first direction in proper order, thereby each detection area can cover whole fingerprint identification district in order, improve the fingerprint identification rate of accuracy, realize that the subregion lights the testing light source, and the subregion is put the fingerprint detection, avoid stray light and the light of crosstalking among the fingerprint identification process, improve fingerprint identification efficiency.

The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

Optionally, with continued reference to fig. 3, any detection zone of the j +1 th sub-fingerprint identification zone 111 may be adjacent to a corresponding detection zone of the j sub-fingerprint identification zone 111 along the first direction X. In the present embodiment, the detection areas corresponding to two adjacent sub-fingerprint identification areas 111 of the N sub-fingerprint identification areas 111 are disposed adjacently, for example, fig. 3 shows that the detection area 1111-3 in the 1 st sub-fingerprint identification area 111-1, the 2 nd sub-fingerprint identification area 111-2, the 3 rd sub-fingerprint identification area 111-3, the 4 th sub-fingerprint identification area 111-4, the detection area 1111-3 in the 2 nd sub-fingerprint identification area 111-2 is adjacent to the detection area 1111-1 in the 1 st sub-fingerprint identification area 111-1, and the detection area 1111-4 in the 2 nd sub-fingerprint identification area 111-2 is adjacent to the detection area 1111-2 in the 1 st sub-fingerprint identification area 111-1; the detection zone 1111-5 in the 3 rd sub-fingerprint identification zone 111-3 is adjacent to the detection zone 1111-3 in the 2 nd sub-fingerprint identification zone 111-2, and the detection zone 1111-6 in the 3 rd sub-fingerprint identification zone 111-3 is adjacent to the detection zone 1111-4 in the 2 nd sub-fingerprint identification zone 111-2. The adjacent sub-fingerprint identification district 111 correspond the detection zone and border on the setting, be favorable to carrying out fingerprint identification detection along specific direction in order to the detection zone of each sub-fingerprint identification district 111, be convenient for control fingerprint identification testing process, and can detect the detection zone one by one in order, avoid appearing omitting the detection zone or the repeated condition that detects to the detection zone, improve fingerprint identification detection efficiency.

Fig. 4 is a schematic time line diagram of a scanning cycle according to an embodiment of the present invention, and optionally, the same frame scanning period Ti of the display panel may include a plurality of first periods Ta, a plurality of second periods Tb and a third period Tc; the luminescence unit of the M detection zone of the sub fingerprint identification district of drive ith sends light to a plurality of fingerprint identification units of the M detection zone of this sub fingerprint identification district of drive carry out fingerprint detection, include: in a first time period Ta, driving light emitting units of M detection areas of the ith sub-fingerprint identification area to emit light; in a second time period Tb, performing touch detection through the touch electrode; driving a plurality of fingerprint units of M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection in a third time period Tc; the second time period Tb is located between two adjacent first time periods Ta or after the last first time period Ta; the third period Tc is located after the first period Ta and the second period Tb.

The present embodiment divides each frame scanning period Ti into a plurality of periods according to functions: a first period Ta, a second period Tb, and a third period Tc. The first time period Ta is the time period that the luminescence unit of each detection zone in the present sub-fingerprint identification district of drive sent light, and second time period Tb is the time period that carries out touch-control detection for whole fingerprint identification district through the touch-control electrode, and the time period that the fingerprint identification unit of each detection zone in the present sub-fingerprint identification district of drive carries out fingerprint identification detection for the third time period Tc. In general, the third period Tc follows the first period Ta and the second period Tb within each frame scanning period because the light emitting units of the sub-fingerprint identification areas need to be lit to provide a light source for fingerprint identification detection. And one frame scanning period Ti may include a plurality of first periods Ta and a plurality of second periods Tb, and the first periods Ta and the second periods Tb are alternately arranged, i.e. the second periods Tb are generally located within two adjacent first periods Ta or after the last first period Ta of the frame scanning period, and the third period Tc is located after all the first periods Ta and the second periods Tb. In this embodiment, the second time period Tb is set for touch detection, which is helpful for waking up the functional operations such as shooting of the display panel, and realizes the richness of the functions of the display panel. And the first time period Ta and the second time period Tb are alternately arranged, so that the touch frequency can be improved, and the touch efficiency can be improved.

FIG. 5 is a schematic diagram of another fingerprint identification zone provided by an embodiment of the present invention, and alternatively, referring to FIGS. 3 and 5, each sub-fingerprint identification zone 111 may include one annular detection zone a1, or a plurality of nested annular detection zones a1 with their centers coincident; the first direction X is a direction in which the edge of the annular detection zone a1 points toward the center o of the annular detection zone a 1.

Each sub fingerprint identification section 111 may include at least one annular detection section a1, fig. 5 shows a case where each sub fingerprint identification section 111 includes one annular detection section a1, each detection section is shaped as an annular detection section a1 with centers o coincident, and the corresponding annular detection sections a1 in each sub fingerprint identification section 111 are sequentially arranged in the first direction X. In fig. 5, the 1 st sub-fingerprint identification zone 111-1, the 2 nd sub-fingerprint identification zone 111-2, the 3 rd sub-fingerprint identification zone 111-3, and the 4 th sub-fingerprint identification zone 111-4 are shown, each sub-fingerprint identification zone 111 includes an annular detection zone a1, and the annular detection zones a1 of the sub-fingerprint identification zones 111 are sequentially arranged along the first direction X. Fig. 3 shows a case where each sub-fingerprint identification section 111 includes two annular detection sections a1, each of which is shaped as an annular detection section a1 with centers o coincident, and the corresponding annular detection sections a1 in each sub-fingerprint identification section 111 are arranged in sequence along the first direction X. When each sub-fingerprint identification zone 111 includes a plurality of annular detection zones a1, centers of the plurality of annular detection zones a1 coincide with each other, and the annular detection zones a1 do not overlap with each other, that is, the plurality of annular detection zones a1 are nested with each other, and the annular detection zones a1 in each sub-fingerprint identification zone 111 may not be adjacently disposed, for example, as shown in fig. 3, the detection zone a11 and the detection zone a12 in the 1 st sub-fingerprint identification zone 111-1, and the detection zone a11 and the detection zone a12 are in an annular structure with a coincident center and not adjacent to each other, it is noted that each detection zone 1111 in the fingerprint identification zone 11 is an annular detection zone a1 with a coincident center and nested with each other, and the annular detection zone a1 located closest to the center o may be annular or circular, as shown in fig. 3, and the detection zone a12 is. The annular detection areas a1 in each sub-fingerprint identification area 111 may also be arranged adjacently, as shown in fig. 3, the 4 th sub-fingerprint identification area 111-4 includes a detection area a11 and a detection area a12, and the detection areas a11 and a12 are overlapped and adjacent annular structures. When the fingerprint identification area 11 is circular, setting each detection area a1 to be circular facilitates the division of the detection areas, improving detection efficiency.

Alternatively, referring to fig. 3, each sub-fingerprint identification region 111 may include: the center of the first annular detection area a11 and the center of the second annular detection area a12 coincide; the first annular detection zone a11 of the 1 st sub-fingerprint identification zone 111-1 surrounds all other annular detection zones a11, and the second annular detection zone a12 is surrounded by all other annular detection zones a 1; the first annular detection zone a11 of the jth sub-fingerprint identification zone 111 encloses the first annular detection zone a11 of the j +1 th sub-fingerprint identification zone 111; the second annular detection zone a12 of the j +1 th sub-fingerprint identification zone 111 surrounds the second annular detection zone a12 of the j th sub-fingerprint identification zone 111.

As shown in fig. 3, the first annular detection area a11 of the 1 st sub-fingerprint identification area 111-1 is disposed at the outermost side of all other annular detection areas a11, and surrounds all other annular detection areas a11, the second annular detection area a12 may be surrounded by all other annular detection areas a1, and each annular detection area a1 of the other sub-fingerprint identification areas 111 is disposed in the annular area between the first annular detection area a11 and the second annular detection area a12 of the 1 st sub-fingerprint identification area 111-1. For the first annular detection area a11 of each sub-fingerprint identification area 111, the first annular detection area a11 of each sub-fingerprint identification area 111 is arranged in the first direction X from edge to center in sequence from the 1 st sub-fingerprint identification area 111 to the last sub-fingerprint identification area 111, for example, as shown in fig. 3, the first annular detection area a11 of the 1 st sub-fingerprint identification area 111-1 surrounds the first annular detection area a11 of the 2 nd sub-fingerprint identification area 111-2, the first annular detection area a11 of the 2 nd sub-fingerprint identification area 111-2 surrounds the first annular detection area a11 of the 3 rd sub-fingerprint identification area 111-3, that is, the first annular detection area a11 of the j sub-fingerprint identification area 111 surrounds the first annular detection area a11 of the j +1 th sub-fingerprint identification area 111. For the second annular detection area a12 of each sub-fingerprint identification area 111, the first annular detection area a12 of each sub-fingerprint identification area 111 is arranged in the first direction X from the center to the edge in sequence from the 1 st sub-fingerprint identification area 111 to the last sub-fingerprint identification area 111, for example, as shown in fig. 3, the second annular detection area a12 of the 3 rd sub-fingerprint identification area 111-3 surrounds the second annular detection area a12 of the 2 nd sub-fingerprint identification area 111-2, the second annular detection area a12 of the 2 nd sub-fingerprint identification area 111-2 surrounds the second annular detection area a12 of the 1 st sub-fingerprint identification area 111-1, that is, the second annular detection area a12 of the j +1 th sub-fingerprint identification area 111 surrounds the second annular detection area a12 of the j sub-fingerprint identification area 111. Each first annular detection area a11 of this embodiment is arranged along first direction X from edge to center in proper order, and each second annular detection area a12 is arranged along first direction X from center to edge in proper order, and this embodiment is along the two-way arrangement detection area in first direction X to reduce the check-out time, improve fingerprint identification's efficiency.

Optionally, the ring width of the ring-shaped detection area may be less than or equal to 400 μ M, as shown in fig. 6, fig. 6 is a schematic flowchart of another fingerprint identification method for a display panel according to an embodiment of the present invention, in this example, the light-emitting units of M detection areas of an i-th sub-fingerprint identification area are driven to emit light and a plurality of fingerprint identification units of M detection areas of the i-th sub-fingerprint identification area are driven to perform fingerprint detection in an i-th frame scanning period, so as to further limit the fingerprint identification method for a display panel, where the method includes the following steps:

step S210, in a scanning period, each fingerprint identification unit carries out fingerprint identification detection; the scanning cycle includes N frame scanning periods; the frame scanning time period is an interval time from the scanning start line of one frame of picture of the display panel to the scanning start line of the next frame of picture.

Step S220, in the ith frame scanning time period, driving the light emitting units of the M annular detection areas of the ith sub-fingerprint identification area to emit light, and driving a plurality of fingerprint identification units on the central ring line of each annular detection area of the ith sub-fingerprint identification area to perform fingerprint detection; the distance between the central loop line and the outer annular edge of the annular detection area is equal to the distance between the central loop line and the inner annular edge of the annular detection area.

Wherein N is not less than 2 and is an integer; m is a positive integer, i is more than or equal to 1 and less than or equal to M and is an integer.

Referring to fig. 3, in the present embodiment, the ring width d1 of the ring-shaped detection area a1 may be less than or equal to 400 μm, as shown in fig. 7, fig. 7 is a schematic diagram of the optical path of the fingerprint identification process provided in the embodiment of the present invention, generally, the ridge length is about 352 μm, the valley length is about 200 μm, and the liquid crystal panel is a panel with a large film thickness, which is exemplified by the liquid crystal display panel in the present application, after the film layers are stacked, the distance between the position of the fingerprint identification unit and the perpendicular to the finger tip and the panel is 1000 μm, from the above data, it can be confirmed that the incident light of the emergent light within 5.7 ° is the effective emergent light, and the other light is the shielding light, the valley is the minimum identification unit, and the light emitted from the backlight is the light within the distance d2 in the figure, that for the fingerprint identification unit at the position P1, the light within 400 μm around the fingerprint identification unit is the effective, light in other ranges is stray light. Therefore, in the present embodiment, the ring width d1 of the ring-shaped detection area a1 may be set to be less than or equal to 400 μm, and at the same time, referring to fig. 8, fig. 8 is a structural view of any one of the ring-shaped detection areas in fig. 3, and in a frame scanning period in which the light emitting units in the ring-shaped detection area a1 are lit, the fingerprint detection is performed by the plurality of fingerprint identification units 14 on the central ring line L1 of the ring-shaped detection area a 1. The distance d3 between the central loop line L1 and the outer annular edge of the annular detection zone a1 is equal to the distance d4 between the central loop line L1 and the inner annular edge of the annular detection zone a 1. Then, in the first direction X, the light beams of the plurality of fingerprint identification units 14 incident on the central loop L1 from the annular detection area a1 are all effective light, so that the crosstalk of the fingerprint identification light beams is reduced, and the accuracy of fingerprint identification detection is improved. In addition, in the frame scanning period in which a certain annular detection area a1 is lit, fingerprint recognition detection is performed only by driving the fingerprint recognition unit 14 on the center loop line L1 of the annular detection area a1, the number of driving the fingerprint recognition unit 14 can be reduced, and the power consumption of the display panel can be reduced while improving detection accuracy. Even more, the fingerprint identification units 14 can be arranged only on the central loop line L1 of the annular detection area a1 of the display panel, thereby reducing the arrangement number of the fingerprint identification units 14 in the fingerprint identification area and saving the panel manufacturing process and manufacturing cost.

Step S230, setting M detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area in a one-to-one correspondence manner; j is more than or equal to 1 and less than or equal to N-1 and is an integer; the detection areas corresponding to the N sub-fingerprint identification areas are sequentially arranged along a first direction.

In this embodiment, the detection zone is cyclic annular detection zone to in lighting a certain frame scanning time quantum of luminescence unit in the detection zone, only drive the fingerprint identification unit on the central loop line of this detection zone, reduce stray light, improve fingerprint identification's accurate nature.

Fig. 9 is a schematic structural view of another fingerprint identification area provided by an embodiment of the present invention, fig. 10 is a schematic structural view of another fingerprint identification area provided by an embodiment of the present invention, and optionally, each sub-fingerprint identification area 111 may include one or more strip-shaped detection areas b1 extending along the second direction Y; the plurality of strip-shaped detection areas b1 are sequentially arranged along the first direction X; the first direction X is intersected with the second direction Y; any one of the bar detection areas b1 of the j +1 th sub-fingerprint identification area 111 is disposed at one side of the corresponding bar detection area b1 of the j th sub-fingerprint identification area 111 along the first direction X.

The detection regions in this embodiment may be bar-shaped detection regions b1, each bar-shaped detection region b1 extends along the second direction Y and is sequentially arranged along the first direction X, the first direction X is a direction pointing from one side of the fingerprint identification region 11 to the other side, the first direction X intersects with the second direction Y, and optionally, as shown in fig. 10, the first direction X and the second direction Y are perpendicular to each other. In each sub-fingerprint identification area 111, the strip detection areas b1 corresponding to each other are sequentially arranged along the first direction X, specifically, any one strip detection area b1 of the j +1 th sub-fingerprint identification area 111 is disposed on one side of the corresponding strip detection area b1 of the j sub-fingerprint identification area 111 along the first direction X, each sub-fingerprint identification area 111 includes at least one strip detection area b1, exemplarily, referring to fig. 9, fig. 9 shows a case where each sub-fingerprint identification area 111 includes only one strip detection area b1, and fig. 9 shows four sub-fingerprint identification areas 111: the 1 st sub-fingerprint identification section 111-1, the 2 nd sub-fingerprint identification section 111-2, the 3 rd sub-fingerprint identification section 111-3 and the 4 th sub-fingerprint identification section 111-4, the bar detection section b1 of the 2 nd sub-fingerprint identification section 111-2 is disposed at one side of the bar detection section b1 of the 1 st sub-fingerprint identification section 111-1 along the first direction X.

In fig. 10, which shows the case where each sub-fingerprint identification area 111 includes two bar-shaped detection areas b1, the entire fingerprint identification area 11 includes four sub-fingerprint identification areas 111: a1 st sub-fingerprint identification zone 111-1, a 2 nd sub-fingerprint identification zone 111-2, a 3 rd sub-fingerprint identification zone 111-3 and a 4 th sub-fingerprint identification zone 111-4. Each sub-fingerprint identification zone 111 includes a first strip detection zone b11 and a second strip detection zone b12, the first strip detection zone b11 and the second strip detection zone b12 being non-adjacently disposed. The first bar detection region b11 of the 2 nd sub-fingerprint identification region 111-2 is disposed at one side of the first bar detection region b11 of the 1 st sub-fingerprint identification region 111-1 along the first direction X, and the second bar detection region b12 of the 2 nd sub-fingerprint identification region 111-2 is disposed at one side of the second bar detection region b12 of the 1 st sub-fingerprint identification region 111-1 along the first direction X. This embodiment will be whole fingerprint identification district 11 and divide into M equal parts along first direction X, and every equal part carries out fingerprint identification detection to detection zone b1 one by one simultaneously, under the prerequisite that does not produce stray light, improves fingerprint identification detection speed.

FIG. 11 is a schematic diagram of another fingerprint identification area provided by an embodiment of the present invention, FIG. 12 is a schematic diagram of another fingerprint identification area provided by an embodiment of the present invention, and optionally, each sub-fingerprint identification area 111 may include one bar-shaped detection area b1, or a plurality of bar-shaped detection areas b1 intersecting at a first intersection point o', which is the center o of the fingerprint identification area 11; the first direction X is clockwise or counterclockwise with the midpoint o of the fingerprint identification area 11 as the center; in the first direction X, an included angle between a center line L2 of any one bar-shaped detection area b1 of the j +1 th sub-fingerprint identification area 111 and a center line L2 of a corresponding bar-shaped detection area b1 of the j sub-fingerprint identification area 111 is a first included angle θ 1; all the first included angles θ 1 are equal.

Fig. 11 shows the case where each sub-fingerprint identification area 111 comprises one bar-shaped detection area b1, and fig. 11 comprises four sub-fingerprint identification areas 111: the 1 st sub-fingerprint identification zone 111-1, the 2 nd sub-fingerprint identification zone 111-2, the 3 rd sub-fingerprint identification zone 111-3 and the 4 th sub-fingerprint identification zone 111-4, the extending directions of the strip detection zones b1 are different and can be compared with the same point, which is the midpoint of the strip detection zones b1 and is the center o of the fingerprint identification zone 11, the strip detection zones b1 between the adjacent sub-fingerprint identification zones 111 have a certain included angle in the rotation direction along the first direction X, i.e. a first included angle θ 1, and all the first included angles θ 1 are equal, for example, a first included angle θ 1 exists between the strip detection zone b1 of the 1 st sub-fingerprint identification zone 111-1 and the strip detection zone b1 of the 2 nd sub-fingerprint identification zone 111-2, it should be noted that the first included angle θ 1 is the central line L2 of any strip b1 of the j +1 th sub-fingerprint identification zone 111 and the corresponding strip detection zone b1 of the j +1 th sub-fingerprint identification zone 111 Center line L2. The centerline L2 of the strip-shaped detection zone b1 is the centerline of the strip-shaped detection zone b1 in the direction of extension of the strip-shaped detection zone b 1. The first direction X is a clockwise or counterclockwise direction with the center o as a center, and the specific direction of rotation is not limited in this embodiment, but is illustrated as a clockwise direction in fig. 11. The strip-shaped detection area b1 with different extension directions can effectively cover the whole fingerprint identification area 11, so as to obtain a fingerprint detection image of the whole fingerprint identification area 11. Figure 12 shows a case where each sub-fingerprint identification area 111 comprises a plurality of fingerprint identification areas 111, each sub-fingerprint identification zone 111 of fig. 12 includes a first bar detection section b11 and a second bar detection section b12, the first bar detection section b11 and the second bar detection section b12 intersecting at a first intersection point o', i.e. the center o of the fingerprint identification zone 11, fig. 12 shows a1 st sub-fingerprint identification zone 111-1, a 2 nd sub-fingerprint identification zone 111-2 and a 3 rd sub-fingerprint identification zone 111-3, and exemplarily, an angle between the first strip detection area b11 of the 2 nd sub-fingerprint identification zone 111-2 and the first strip detection area b11 of the 1 st sub-fingerprint identification zone 111-1 along the first direction X is a first angle θ 1, and an angle between the second strip detection area b12 of the 2 nd sub-fingerprint identification zone 111-2 and the second strip detection area b12 of the 1 st sub-fingerprint identification zone 111-1 along the first direction X is a first angle θ 1. This embodiment will be whole fingerprint identification district 11 and divide into M equal parts along first direction X, and every equal part carries out fingerprint identification detection to detection zone b1 one by one simultaneously, under the prerequisite that does not produce stray light, improves fingerprint identification detection speed.

Alternatively, referring to fig. 9-12, the width d5 of the bar detection zone b1 may be less than or equal to 400 μm; as shown in fig. 13, fig. 13 is a schematic flowchart of another fingerprint identification method for a display panel according to an embodiment of the present invention, in which the present example further defines that, in an ith frame scanning period, light emitting units of M detection areas of an ith sub-fingerprint identification area are driven to emit light, and fingerprint detection is performed by a plurality of fingerprint identification units of M detection areas of the ith sub-fingerprint identification area, the fingerprint identification method for a display panel includes the following steps:

step S310, in a scanning period, each fingerprint identification unit carries out fingerprint identification detection; the scanning cycle includes N frame scanning periods; the frame scanning time period is an interval time from the scanning start line of one frame of picture of the display panel to the scanning start line of the next frame of picture.

Step S320, in the ith frame scanning time period, driving the light-emitting units of the M strip-shaped detection areas of the ith sub-fingerprint identification area to emit light, and driving a plurality of fingerprint identification units on the central line of each strip-shaped detection area of the ith sub-fingerprint identification area to perform fingerprint detection; the distance between the central line and the length edge of one side of the strip-shaped detection area is equal to the distance between the central line and the length edge of the other side of the strip-shaped detection area.

Referring to fig. 9, during a frame scan period in which the light emitting cells in the current bar detection area b1 are lit, a plurality of fingerprint recognition units 14 on the center line L2 of the bar detection area b1 perform fingerprint detection. The distance d6 between the center line L2 and the length edge of one side of the strip-shaped detection area b1 is equal to the distance d4 between the center line L2 and the length edge of the other side of the strip-shaped detection area b 1. Then, in the first direction X, the light rays obtained by the plurality of fingerprint identification units covered by the strip-shaped detection area b1 and incident to the central line L2 are all effective light rays, so that the crosstalk of the fingerprint identification light rays is reduced, and the accuracy of fingerprint identification detection is improved. In addition, in the frame scanning period of lighting a certain bar detection area b1, fingerprint identification detection is performed only by driving the fingerprint identification unit on the center line L2 of the bar detection area b1, so that the number of driving the fingerprint identification unit can be reduced, and the power consumption of the display panel can be reduced while the detection accuracy is improved. Even, the fingerprint identification units can be arranged only on the central line L2 of the strip-shaped detection area b1 of the display panel, so that the arrangement number of the fingerprint identification units in the fingerprint identification area is reduced, and the panel manufacturing process and the manufacturing cost are saved.

S330, setting M detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area in a one-to-one correspondence manner; j is more than or equal to 1 and less than or equal to N-1 and is an integer; the detection areas corresponding to the N sub-fingerprint identification areas are sequentially arranged along a first direction.

In this embodiment, the detection zone is the bar detection zone to in lighting a certain detection zone in the frame scanning time quantum of luminescence unit, only drive the fingerprint identification unit on the central line of this detection zone, reduce stray light, improve fingerprint identification's accurate nature.

FIG. 14 is a schematic diagram of another fingerprint identification area according to an embodiment of the present invention, and optionally, each sub-fingerprint identification area 111 may include a plurality of block detection areas c 1; the connecting lines of the central points P2 of the block-shaped detection areas c1 form a plurality of annular lines L3, and the centers o1 of the annular lines L3 are overlapped; the first direction X is a clockwise or counterclockwise direction centered on the center o1 of the annular line L3; in the first direction X, an included angle between a connecting line formed by the central point P2 of any one block-shaped detection area c1 of the j +1 th sub-fingerprint identification area 111 and the center o1 of the annular line L3 and a connecting line formed by the central point P2 of the block-shaped detection area c1 corresponding to the j sub-fingerprint identification area 111 and the center o1 of the annular line L3 is a second included angle θ 2; all second included angles θ 2 are equal.

As shown in FIG. 14, each sub-fingerprint identification zone 111 may include a plurality of block detection zones c1, and block detection zone c1 may be rectangular, circular, and other regular or irregular shapes. The plurality of block-shaped detection areas c1 may be arranged in a circle, as shown in fig. 14, a connection line of the central points P2 of the plurality of block-shaped detection areas c1 forms a circular line L3, the entire fingerprint identification area 11 may include a plurality of circular lines L3, and the centers o1 of the circular lines L3 coincide, and an angle between a connection line formed by the central point P2 of any one block-shaped detection area c1 of the current sub-fingerprint identification area 111 and the center o1 of the circular line L3 and a connection line formed by the central point P2 of the corresponding block-shaped detection area c1 of the previous sub-fingerprint identification area 111 and the center o1 of the circular line L3 along the rotation direction of the first direction X is a second angle θ 2. The first direction X is a clockwise or counterclockwise direction centered on the center o1 of the annular line L3. Two sub-fingerprint identification areas 111 are shown in FIG. 14: a1 st sub-fingerprint identification section 111-1 and a second sub-fingerprint identification section 111-2. One block-shaped detection area c11 in the 1 st sub-fingerprint identification area 111-1 may be selected, a block-shaped detection area c12 corresponding to the block-shaped detection area c11 in the 2 nd sub-fingerprint identification area 111-2 is selected, an included angle between a connection line L4 formed by a central point P2 of the block-shaped detection area c11 and a center o1 of the annular line L3 and an included angle between a connection line L5 formed by a central point P2 of the block-shaped detection area c12 and a center o1 of the annular line L3 is a second included angle θ 2, and an included angle between any two corresponding block-shaped detection areas c1 in all sub-fingerprint identification areas 111 is the second included angle θ 2. In this embodiment, each detection zone is the cubic of separation, can further reduce the size of detection zone, prevents the production of the crosstalking light of fingerprint identification in-process, improves the precision that fingerprint identification detected.

With continuing reference to fig. 14, alternatively, in a direction pointing to the center o1 of the annular line L3 along the annular line L3, the size of the block-shaped detection area c1 may be smaller than or equal to 400 μ M, with reference to fig. 15, fig. 15 is a schematic flow chart of another fingerprint identification method for a display panel according to an embodiment of the present invention, which further defines the steps of driving the light emitting units of the M detection areas of the ith sub-fingerprint identification area to emit light and driving the fingerprint identification units of the M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection in the ith frame scanning period, and the fingerprint identification method for a display panel includes:

step S410, in a scanning period, each fingerprint identification unit carries out fingerprint identification detection; the scanning cycle includes N frame scanning periods; the frame scanning time period is an interval time from the scanning start line of one frame of picture of the display panel to the scanning start line of the next frame of picture.

Step S420, in the ith frame scanning time period, driving the light emitting units of the M block-shaped detection areas of the ith sub-fingerprint identification area to emit light, and driving a plurality of fingerprint identification units on the annular line of each block-shaped detection area of the ith sub-fingerprint identification area to perform fingerprint detection; the distance between the annular line and the outer edge of the block-shaped detection area is equal to the distance between the annular line and the inner edge of the block-shaped detection area.

In this embodiment, the size of the block detection area c1 may be less than or equal to 400 μm, that is, the width of the block detection area c1 in any direction of the plane where the display panel is located is less than or equal to 400 μm, then the light reflected to the central point P2 of the block detection area c1 by the whole block detection area c1 is all effective light, so as to further enhance the accuracy of the fingerprint identification process, and in the frame scanning period of lighting some block detection areas c1, the fingerprint identification detection is performed only by driving the fingerprint identification unit on the central point P2 of the block detection area c1, which can reduce the number of driving fingerprint identification units, and reduce the power consumption of the display panel while improving the detection accuracy. Even, the fingerprint identification units can be arranged only at the central point P2 of the block-shaped detection area c1 of the display panel, so that the arrangement number of the fingerprint identification units in the fingerprint identification area is reduced, and the panel manufacturing process and the manufacturing cost are saved.

S430, setting M detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area in a one-to-one correspondence manner; j is more than or equal to 1 and less than or equal to N-1 and is an integer; the detection areas corresponding to the N sub-fingerprint identification areas are sequentially arranged along a first direction.

In this embodiment, the detection zone is cubic detection zone to in lighting a certain detection zone in the frame scanning time quantum of luminescence unit, only drive the fingerprint identification unit on the central point of this detection zone, reduce stray light, improve fingerprint identification's accurate nature.

Fig. 16 is a schematic structural diagram of another display panel provided in the embodiment of the present invention, and optionally, the display panel may further include: a gate driving circuit 16 for scanning the light emitting cells 13 arranged in the array row by row in a first period of each frame scanning period; the fingerprint identification method of the display panel further comprises the following steps: in a plurality of first time periods within one frame scanning time period, the control gate driving circuit starts scanning with the first row of light emitting units of the fingerprint identification area as a scanning start row and stops scanning with the last row of light emitting units of the fingerprint identification area as a scanning end row.

The display panel includes a display region (including a fingerprint identification region 11 and a non-fingerprint identification region 12) and a non-display region 12, and the non-display region of the display panel is further provided with a gate driving circuit 16 capable of scanning the light emitting units 13 line by line in a first period of each frame scanning period. As can be seen from fig. 4, in each frame scanning period Ti, the period of scanning the light emitting unit is a first period Ta, the period of performing the touch detection is a second period Tb, the period of scanning the fingerprint identification unit is Tc, and the period of scanning the light emitting unit and the period of performing the touch detection are divided into a plurality of portions in each frame scanning period Ti, so that each frame scanning period Ti includes a plurality of first periods Ta and a plurality of second periods Tb, and after all the first periods Ta in each frame scanning period T have elapsed, the gate driving circuit 16 completes scanning of one frame of the display screen.

The frame scanning time period Ti is a time interval between the start of scanning of the scanning start line of one frame and the start of scanning of the scanning start line of the next frame. In general, when scanning light emitting cells, it is necessary to scan light emitting cells in the first row to the last row of the entire display panel, and the length h1 of the main current display region is generally not less than 15cm, the scanning frequency of the gate driver circuit 16 is 60Hz, and the length h2 of the fingerprint identification area 11 is about 3cm, the control gate driving circuit 16 of the present embodiment only scans the fingerprint identification area 11, the light emitting cell row where the first row of light emitting cells 13 in the fingerprint identification area is located is taken as the scanning start row, the light emitting cell row where the last row of light emitting cells in the fingerprint identification area is taken as the scanning end row, the scanning frequency of the gate driving circuit 16 can reach 300Hz, that is, each second can include 300 frame scanning time periods Ti, and the time of each frame scanning time period Ti is reduced, so that the time of the whole scanning period T is shortened, and the speed of fingerprint identification detection is increased.

Based on the same concept, the embodiment of the invention also provides a display panel. As shown in fig. 16, the display panel includes a fingerprint identification area 11 and a non-fingerprint identification area 12, the fingerprint identification area 11 and the non-fingerprint identification area 12 are both provided with light emitting units 13 arranged in an array, and the fingerprint identification area 11 is further provided with a plurality of fingerprint identification units 14; the fingerprint identification section 11 includes N sub-fingerprint identification sections; each sub-fingerprint identification area comprises M detection areas; n is not less than 2 and is an integer; m is a positive integer;

the display panel further comprises a control unit 17, the control unit 17 being configured to: in a scanning period, each fingerprint identification unit carries out fingerprint identification detection; the scanning cycle includes N frame scanning periods; the frame scanning time period is the interval time from the scanning start line of one frame of picture of the display panel to the scanning start line of the next frame of picture; in the ith frame scanning time period, driving the light emitting units of the M detection areas of the ith sub-fingerprint identification area to emit light, and driving the plurality of fingerprint identification units of the M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection; i is more than or equal to 1 and less than or equal to M and is an integer; m detection areas of the j +1 th sub-fingerprint identification area and M detection areas of the j sub-fingerprint identification area are arranged in a one-to-one correspondence mode; j is more than or equal to 1 and less than or equal to N-1 and is an integer; the detection areas corresponding to the N sub-fingerprint identification areas are sequentially arranged along a first direction.

Alternatively, with continued reference to fig. 16, the display panel may include a display area and a non-display area 15, the display area including the fingerprint identification area 11 and the non-fingerprint identification area 12, the non-display area 15 including: a gate driving circuit 16 for scanning the light emitting cells 13 arranged in the array row by row in a first period of each frame scanning period; the gate driving circuit 16 includes a shift register 161 corresponding to each row of the light emitting units 13 of the display panel, and the shift register 161 is used for providing a gate scanning signal for the corresponding row of the light emitting units 13; in a plurality of first periods of the frame scanning period, the shift register 161a corresponding to the first row of light-emitting cells of the fingerprint identification area 11 is electrically connected to the start signal terminal STV2, so that the first row of light-emitting cells of the fingerprint identification area 11 can be used as a scanning start row of the gate driving circuit 16; the shift register 161b corresponding to the last row of light emitting cells of the fingerprint identification area 11 is electrically connected to the termination signal terminal VSR Nest, so that the last row of light emitting cells of the fingerprint identification area 11 can be used as the scanning termination row of the gate driving circuit 16.

The gate driving circuit 16 includes cascaded shift registers 161, a first shift register 161 of the gate driving circuit 16 needs to be electrically connected to the start signal terminal STV1 for receiving a first start signal transmitted to the start signal terminal STV1 by the control unit 17, so that the first shift register 161 outputs a gate scanning signal to the first row of light-emitting units 13 of the whole display panel, each shift register 161 can drive a next shift register 161 to transmit the gate scanning signal to the corresponding row of light-emitting units 13, thereby driving the shift register 161 step by step, and the last row of light-emitting units 13 of the display panel is electrically connected to the termination signal terminal RST, so that the last shift register 161 can stop working. In this embodiment, only the light emitting units 13 in each row where the fingerprint identification area 11 is located are scanned. That is, the first row of light-emitting units 13 in the fingerprint identification area 11 is used as the scanning start row, the shift register 161 corresponding to the row of light-emitting units 13 may be connected to the start signal terminal STV2, so that in each frame scanning period, the scanning is started from the first row of light-emitting units 13 in the fingerprint identification area 11, and the last row of light-emitting units 13 in the fingerprint identification area 11 is electrically connected to the end signal terminal VSR Nest, so that when the gate driving circuit 16 scans the last row of light-emitting units 13 in the fingerprint identification area 11, the current shift register 161 corresponding to the row cannot drive the next-stage shift register 161, and exemplarily, the output terminal of the shift register 161b to the next-stage shift register 161 may be pulled down, so that the next-stage shift register 161 cannot be driven. In the embodiment, the time of each frame scanning time period is reduced, so that the time of the whole scanning period is shortened, the speed of fingerprint identification detection is improved, and the power consumption in the fingerprint identification process is saved. Of course, when the fingerprint recognition is not required, the output of the signals from the start signal terminal STV2 and the end signal terminal VSR Nest can be stopped when the display panel performs normal screen display, so that the gate driving circuit 16 scans the entire display area under the control of the start signal terminal STV1 and the end signal terminal RST.

Optionally, the display panel may be a liquid crystal display panel, and the light emitting unit is a sub-pixel opening; or the display panel is an organic light-emitting display panel, and the light-emitting unit is an organic light-emitting unit; or the display panel is a micro LED display panel, and the light-emitting unit is a micro inorganic light-emitting diode. The present embodiment does not limit the specific type of the display panel.

The embodiment of the invention also provides a display device. As shown in fig. 17, fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device according to the embodiment of the present invention includes the display panel 1 according to any embodiment of the present invention. The display device may be a mobile phone as shown in fig. 17, or may be a computer, a television, an intelligent wearable device, and the like, which is not particularly limited in this embodiment.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A fingerprint identification method of a display panel is characterized in that the display panel comprises a fingerprint identification area and a non-fingerprint identification area, the fingerprint identification area and the non-fingerprint identification area are both provided with light emitting units which are arranged in an array manner, the fingerprint identification area is also provided with a plurality of fingerprint identification units,

the fingerprint identification method comprises the following steps:

2. The method of claim 1, wherein any detection zone of the j +1 th sub-fingerprint identification zone is adjacent to a corresponding detection zone of the j sub-fingerprint identification zone along the first direction.

3. The fingerprint identification method of the display panel according to claim 1, wherein the same frame scanning period of the display panel includes a plurality of first periods, a plurality of second periods and a third period;

the luminescence unit of the M detection area in the sub fingerprint identification district of drive ith sends light to drive this sub fingerprint identification district a plurality of fingerprint identification units carry out fingerprint detection, include:

in the first time period, driving the light emitting units of the M detection areas of the ith sub-fingerprint identification area to emit light;

in the second time period, touch detection is carried out through the touch electrode;

driving the plurality of fingerprint units of M detection areas of the ith sub-fingerprint identification area to perform fingerprint detection in the third time period;

the second time period is positioned between two adjacent first time periods or positioned after the last first time period; the third time period is after the first time period and the second time period.

4. The method of claim 1, wherein each sub-fingerprint identification region comprises one annular detection region or a plurality of nested annular detection regions with coincident centers;

the first direction is a direction in which an edge of the annular detection region points to a center of the annular detection region.

5. The fingerprint recognition method of the display panel according to claim 4, wherein each sub fingerprint recognition area comprises: the center of the first annular detection area is coincident with that of the second annular detection area; the first annular detection area of the 1 st sub-fingerprint identification area surrounds all other annular detection areas, and the second annular detection area is surrounded by all other annular detection areas;

the first annular detection area of the jth sub-fingerprint identification area surrounds the first annular detection area of the (j + 1) th sub-fingerprint identification area; the second annular detection zone of the j +1 th sub-fingerprint identification zone surrounds the second annular detection zone of the j sub-fingerprint identification zone.

6. The fingerprint identification method of the display panel according to claim 4, wherein the ring width of the ring-shaped detection area is less than or equal to 400 μm;

in the ith frame scanning time quantum, the light emitting units of the M detection areas of the ith sub-fingerprint identification area are driven to emit light, and the plurality of fingerprint identification units of the M detection areas of the ith sub-fingerprint identification area are driven to perform fingerprint detection, including:

in the ith frame scanning time period, driving the light emitting units of the M annular detection areas of the ith sub-fingerprint identification area to emit light, and driving the plurality of fingerprint identification units on the central annular line of each annular detection area of the ith sub-fingerprint identification area to perform fingerprint detection; the distance between the central loop line and the outer annular edge of the annular detection area is equal to the distance between the central loop line and the inner annular edge of the annular detection area.

7. The fingerprint recognition method of the display panel according to claim 1, wherein each of the sub fingerprint recognition areas includes one or more bar-shaped detection areas extending in the second direction; the strip-shaped detection areas are sequentially arranged along a first direction; the first direction and the second direction are intersected;

any one strip-shaped detection area of the j +1 th sub-fingerprint identification area is arranged on one side, along the first direction, of the corresponding strip-shaped detection area of the j th sub-fingerprint identification area.

8. The fingerprint recognition method of the display panel according to claim 1, wherein each of the sub-fingerprint recognition areas comprises one bar-shaped detection area, or a plurality of bar-shaped detection areas intersecting at a first intersection point, the first intersection point being a center of the fingerprint recognition area;

the first direction is clockwise or anticlockwise direction taking the middle point of the fingerprint identification area as a circle center;

along the first direction, an included angle between the central line of any one strip-shaped detection area of the j +1 th sub-fingerprint identification area and the central line of the corresponding strip-shaped detection area of the j sub-fingerprint identification area is a first included angle; all the first included angles are equal.

9. The fingerprint recognition method of the display panel according to claim 7 or 8, wherein the width of the bar-shaped detection area is less than or equal to 400 μm;

in the ith frame scanning time period, driving the light-emitting units of the M strip-shaped detection areas of the ith sub-fingerprint identification area to emit light, and driving the plurality of fingerprint identification units on the central line of each strip-shaped detection area of the ith sub-fingerprint identification area to perform fingerprint detection; the distance between the central line and the length edge of one side of the strip-shaped detection area is equal to the distance between the central line and the length edge of the other side of the strip-shaped detection area.

10. The fingerprint identification method of the display panel according to claim 1, wherein each of the sub fingerprint identification areas comprises a plurality of block detection areas; connecting lines of the central points of the block-shaped detection areas form a plurality of annular lines, and the centers of the annular lines are overlapped; the first direction is clockwise or anticlockwise direction taking the center of the annular line as a circle center;

along the first direction, an included angle between a connecting line formed by the center point of any block-shaped detection area of the j +1 th sub-fingerprint identification area and the center of the annular line and a connecting line formed by the center point of the corresponding block-shaped detection area of the j sub-fingerprint identification area and the center of the annular line is a second included angle; all the second included angles are equal.

11. The fingerprint recognition method of a display panel according to claim 10,

the size of the block-shaped detection area is less than or equal to 400 μm in a direction in which the annular line points to the center of the annular line;

in the ith frame scanning time period, driving the light-emitting units of the M block-shaped detection areas of the ith sub-fingerprint identification area to emit light, and driving the plurality of fingerprint identification units on the annular line of each block-shaped detection area of the ith sub-fingerprint identification area to perform fingerprint detection; the distance between the annular line and the outer edge of the block-shaped detection area is equal to the distance between the annular line and the inner edge of the block-shaped detection area.

12. The fingerprint recognition method of the display panel according to claim 1, wherein the display panel further comprises: the grid driving circuit is used for scanning the light emitting units arranged in the array line by line in a first time period of each frame scanning time period;

the fingerprint identification method of the display panel further comprises the following steps:

and controlling the gate driving circuit to start scanning by taking a first row of light-emitting units of the fingerprint identification area as a scanning starting row and stop scanning by taking a last row of light-emitting units of the fingerprint identification area as a scanning ending row in a plurality of first time periods in one frame scanning time period.

13. The display panel is characterized by comprising a fingerprint identification area and a non-fingerprint identification area, wherein the fingerprint identification area and the non-fingerprint identification area are respectively provided with a plurality of light-emitting units which are arranged in an array manner, and the fingerprint identification area is also provided with a plurality of fingerprint identification units; the fingerprint identification area comprises N sub-fingerprint identification areas; each sub-fingerprint identification area comprises M detection areas; n is not less than 2 and is an integer; m is a positive integer;

14. The display panel according to claim 13, wherein the display panel comprises a display area and a non-display area, the display area comprises the fingerprint identification area and the non-fingerprint identification area, and the non-display area comprises: the grid driving circuit is used for scanning the light emitting units arranged in the array line by line in a first time period of each frame scanning time period;

the grid driving circuit comprises a shift register which is in one-to-one correspondence with each row of light-emitting units of the display panel, and the shift register is used for providing grid scanning signals for the corresponding row of light-emitting units;

in a plurality of first time periods of the frame scanning time period, the shift registers corresponding to the first row of light-emitting units in the fingerprint identification area are electrically connected with the start signal end, so that the first row of light-emitting units in the fingerprint identification area is used as a scanning start row of the gate driving circuit; and the shift register corresponding to the last row of light-emitting units in the fingerprint identification area is electrically connected with the termination signal end, so that the last row of light-emitting units in the fingerprint identification area is used as a scanning termination row of the gate drive circuit.

15. The display panel according to claim 13,

the display panel is a liquid crystal display panel, and the light-emitting unit is a sub-pixel opening; alternatively, the first and second electrodes may be,

the display panel is an organic light-emitting display panel, and the light-emitting unit is an organic light-emitting unit; alternatively, the first and second electrodes may be,

the display panel is a micro LED display panel, and the light-emitting unit is a micro inorganic light-emitting diode.

16. A display device characterized by comprising the display panel according to any one of claims 13 to 15.