CN114445867B - Fingerprint identifier and display device - Google Patents
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Abstract
The invention provides a fingerprint identifier and a display device, wherein the fingerprint identifier comprises a plurality of fingerprint identification units which are arrayed along a first direction and a second direction; along the first direction, N fingerprint identification units are arranged in a unit length, along the second direction, M fingerprint identification units are arranged in a unit length, M is larger than N, and the first direction and the second direction are crossed; the processing unit is electrically connected with the fingerprint identification unit and is used for generating M rows and N columns of initial pixel points according to the electric signals transmitted by the fingerprint identification unit, and outputting H rows and N columns of pixel points or outputting M rows and G columns of pixel points after processing; wherein M is more than or equal to G and more than or equal to N, M is more than or equal to H and more than or equal to N, M, N, G, H are all positive integers. The invention provides a fingerprint identifier and a display device, which are used for improving the effective rate of fingerprint identification.
Description
Technical Field
The invention relates to the technical field of display, in particular to a fingerprint identifier and a display device.
Background
Since fingerprints are unique to everyone. Along with development of technology, various display devices with fingerprint identification functions, such as mobile phones, tablet computers, intelligent wearable devices and the like, appear on the market. Therefore, before a user operates the display device with the fingerprint identification function, the user can carry out authority verification by only touching a specific area of the display device with a finger and identifying the fingerprint identification unit, and the authority verification process is simplified. Fingerprint recognition can include light sense fingerprint recognition, ultrasonic fingerprint recognition and the like according to the working principle.
The fingerprint is composed of a series of ridges and valleys on the skin surface of the finger tip, and for example, light-sensitive fingerprint recognition is performed, since the intensities of light reflected by the ridges and valleys received by the fingerprint recognition unit are different, the magnitudes of current/voltage signals converted from reflected light formed at the positions of the ridges and reflected light formed at the positions of the valleys are different, and fingerprint recognition can be performed according to the magnitudes of the current/voltage signals.
However, after the fingerprint data is read, the formed fingerprint is deformed, and the effective rate of fingerprint identification is reduced.
Disclosure of Invention
The invention provides a fingerprint identifier and a display device, which are used for improving the effective rate of fingerprint identification.
In a first aspect, an embodiment of the present invention provides a fingerprint identifier, including a plurality of fingerprint identification units arranged in an array along a first direction and a second direction; along the first direction, N fingerprint identification units are arranged in a unit length, along the second direction, M fingerprint identification units are arranged in a unit length, M is larger than N, and the first direction and the second direction are crossed;
The processing unit is electrically connected with the fingerprint identification unit and is used for generating M rows and N columns of initial pixel points according to the electric signals transmitted by the fingerprint identification unit, and outputting H rows and N columns of pixel points or outputting M rows and G columns of pixel points after processing; wherein M is more than or equal to G and more than or equal to N, M is more than or equal to H and more than or equal to N, M, N, G, H are all positive integers.
In a second aspect, an embodiment of the present invention provides a fingerprint identifier, including a plurality of fingerprint identification units arranged in an array along a first direction and a second direction; along the first direction, N fingerprint identification units are arranged in a unit length, along the second direction, M fingerprint identification units are arranged in a unit length, M is larger than N, and the first direction and the second direction are crossed;
A plurality of fingerprint identification units arranged along the first direction form a fingerprint identification unit row, and the fingerprint identification unit row (M-H) is controlled to be not operated;
The processing unit is electrically connected with the fingerprint identification unit and is used for generating N columns of H rows and N columns of initial pixel points according to the electric signals transmitted by the fingerprint identification unit, and outputting the N columns of H rows and N columns of pixel points after processing;
Wherein M is more than H and equal to or greater than N, M, N, H are all positive integers.
In a third aspect, an embodiment of the present invention provides a display device, including the fingerprint identifier of the first aspect or the second aspect, and a display panel.
The embodiment of the invention provides a fingerprint identifier, M rows and N columns of fingerprint identification units correspondingly form M rows and N columns of initial pixel points in a processing unit, and the initial pixel points are processed. Removing at least one initial pixel point row, and outputting N columns of pixel points of H rows by the processing unit, wherein M is more than or equal to H, and the difference between H and N is smaller than the difference between M and N; the difference in the number of pixels in the first direction and the second direction per unit length is reduced. Or at least one pixel point column is added, the processing unit outputs M rows and G columns of pixel points, M is more than or equal to G and is more than N, the difference between M and G is smaller than the difference between M and N, and the difference between the number of the pixel points in the first direction and the number of the pixel points in the second direction in unit length is reduced. Thereby improving the condition of fingerprint deformation and improving the effective rate of fingerprint identification.
Drawings
Fig. 1 is a schematic diagram of a fingerprint identifier according to an embodiment of the present invention;
Fig. 2 is a schematic arrangement diagram of initial pixel points according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 2;
FIG. 4 is a schematic diagram illustrating another arrangement of initial pixel points according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 4;
FIG. 6 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 6;
FIG. 8 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 8;
FIG. 10 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 10;
FIG. 12 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 12;
FIG. 14 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 14;
FIG. 16 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 17 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 16;
FIG. 18 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 19 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 18;
FIG. 20 is a schematic diagram illustrating another arrangement of initial pixel points according to an embodiment of the present invention;
FIG. 21 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 20;
FIG. 22 is a schematic diagram illustrating another arrangement of initial pixels according to an embodiment of the present invention;
FIG. 23 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in FIG. 22;
fig. 24 is a schematic top view of a display device according to an embodiment of the invention;
FIG. 25 is a schematic cross-sectional view taken along line AA' of FIG. 24;
Fig. 26 is a schematic cross-sectional view of another display device according to an embodiment of the invention;
fig. 27 is a schematic top view of a display panel according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic diagram of a fingerprint identifier according to an embodiment of the present invention, and referring to fig. 1, the fingerprint identifier includes a plurality of fingerprint identification units 10 arrayed along a first direction and a second direction. In the first direction, N fingerprint recognition units 10 are provided per unit length. In the second direction, M fingerprint recognition units 10 are provided per unit length. That is, the fingerprint identifier includes M rows and N columns of fingerprint identification units 10 arranged in the first direction and the second direction. Wherein M > N, the first direction crosses the second direction.
Fig. 2 is a schematic arrangement diagram of initial pixel points according to an embodiment of the present invention, referring to fig. 1 and 2, the fingerprint identifier further includes a processing unit (not shown in fig. 1), and the processing unit is electrically connected to the fingerprint identification unit 10, and is configured to generate M rows and N columns of initial pixel points 20 according to an electrical signal transmitted by the fingerprint identification unit 10. That is, each fingerprint recognition unit 10 forms one initial pixel point 20 correspondingly in the processing unit.
Fig. 3 is a schematic diagram of pixel arrangement corresponding to the initial pixel shown in fig. 2, and referring to fig. 2 and 3, after the processing of the processing unit, the processing unit outputs H rows and N columns of pixel points 30. Wherein M is more than H and equal to or greater than N, M, N, H are all positive integers. The value of the pixel 30 may be the value of the initial pixel 20 corresponding to the pixel before processing, or the value of the pixel 30 may be calculated by an algorithm according to the value of one or more initial pixels 20 before processing. In other embodiments, after the processing unit processes the image, the processing unit outputs M rows and G columns of pixel points, M is greater than or equal to G and is larger than N, and G is a positive integer.
The embodiment of the invention provides a fingerprint identifier, wherein M rows and N columns of fingerprint identification units 10 correspondingly form M rows and N columns of initial pixel points 20 in a processing unit, and the initial pixel points 20 are processed. Removing at least one initial pixel point row, and outputting N columns of pixel points 30 of H rows by the processing unit, wherein M is more than H and is more than or equal to N, and the difference between H and N is smaller than the difference between M and N; the difference in the number of the pixel points 30 in the first direction and the second direction per unit length is reduced. Or at least one pixel column is added, the processing unit outputs M rows and G columns of pixel points, M is larger than or equal to G and is larger than N, the difference between M and G is smaller than the difference between M and N, and the difference of the number of the pixel points 30 in the first direction and the second direction in unit length is reduced. Thereby improving the condition of fingerprint deformation and improving the effective rate of fingerprint identification.
In some embodiments, the fingerprint deformation is improved by removing at least one initial pixel row. It will be appreciated that the fingerprint information carried by the removed initial pixel row disappears and is not presented in the final pixel array, i.e. in the fingerprint image. When some positions of the removed initial pixel point rows are changed, fingerprint information is different, and therefore effective fingerprint identification efficiency is different. The present invention illustratively provides some alternative embodiments.
Alternatively, referring to fig. 2 and 3, a plurality of initial pixel dots 20 arranged in a first direction constitute an initial pixel dot row 201. The (M-H) initial pixel point rows 201 that are removed are the removal rows 211, and the H initial pixel point rows 201 that are reserved are the reserved rows 212. Adjacent M/P initial pixel point rows 201 form an initial pixel point row group 200, and each initial pixel point row group 200 includes (M/P-H/P) removal rows 211. Wherein P is the greatest common divisor of M and H, and P is a positive integer. In the embodiment of the present invention, the (M/P-H/P) removal rows 211 in the initial pixel row group 200 are removed, and the number of removal rows 211 in each initial pixel row group 200 is the same, so that the removal rows 211 are uniformly arranged along the second direction, and the influence on the final fingerprint identification precision is less along with the fingerprint information carried by the initial pixel 20 from which the removal rows 211 are removed, thereby reducing the degree of information distortion.
Illustratively, referring to fig. 2 and 3, m=8, n= 6,H =6 is taken as an example. 2 (i.e., 8-6=2) removal lines 211 in the initial pixel point line 201 are removed, and 6 initial pixel point lines 201 are reserved as reserved lines 212. Adjacent 4 (i.e., 8/2=4) initial pixel rows 201 form an initial pixel row group 200, and each initial pixel row group 200 includes 1 (i.e., 8/2-6/2) removal rows 211. Wherein the greatest common divisor of 8 and 6 is 2, i.e., p=2. After the initial pixel points 20 of 8 rows and 6 columns are processed by the processing unit, the initial pixel points 30 of 6 rows and 6 columns are output, and the number of the pixel points 30 in the first direction and the second direction in unit length is equal, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
In the actual fingerprint identifier, a large number of fingerprint identification units 10 may be provided, for example, 180 fingerprint identification units 10 are provided in the first direction and 240 fingerprint identification units 10 are provided in the second direction in a unit length. At this time, m=240, n=180, taking h=180 as an example, p=60, and adjacent 4 (i.e., 240/60=4) initial pixel dot rows 201 form an initial pixel dot row group 200, and each initial pixel dot row group 200 includes 1 (i.e., 240/60-180/60) removal rows 211. After being processed by the processing unit, the pixel points 30 with 180 rows and 180 columns are output, and the number of the pixel points 30 in the first direction and the second direction in the unit length is equal.
Alternatively, referring to fig. 2 and 3, in the second direction, at least one reserved line 212 is spaced between two adjacent removal lines 211. Therefore, the adjacent two initial pixel point rows 201 are prevented from being removed, fingerprint information carried by the adjacent two initial pixel point rows 201 is prevented from being removed at the same time, and therefore the degree of information distortion is reduced.
Alternatively, referring to fig. 2 and 3, in the second direction, two adjacent removal rows 211 are separated by J reserved rows 212. J= (M/(M-H)) -1. Wherein J is a positive integer. In the embodiment of the present invention, the adjacent removal rows 211 are spaced apart by J reserved rows 212 in the second direction as a whole. The arrangement of the removed rows 211 along the second direction is relatively uniform, and as the fingerprint information carried by the initial pixel points 20 removed by the removed rows 211 does not affect the final fingerprint identification precision, the degree of information distortion is reduced.
Illustratively, referring to fig. 2 and 3, m=8, n= 6,H = 6,J = (8/(8-6) -1) =3. In the second direction, 3 reserved rows 212 are spaced between adjacent two removal rows 211.
Optionally, referring to fig. 2 and 3, the first initial pixel line 201 and the last initial pixel line 201 in the initial pixel line group 200 are both reserved lines 212. That is, the initial pixel point rows 201 at both ends of the initial pixel point row group 200 are reserved, and one or more initial pixel point rows 201 in the middle are removed. Therefore, fingerprint information carried by the first initial pixel row 201 and the last initial pixel row 201 is reserved, fingerprint information at two ends of the initial pixel row group 200 is reserved, fingerprint information carried by one or more initial pixel rows 201 in the middle is removed, intermediate transition fingerprint information is removed, the influence of the absence of the intermediate transition information on final fingerprint identification precision is small, and the degree of information distortion is reduced.
Alternatively, referring to fig. 2 and 3, taking x=4 and y=2 as an example, the initial pixel 20 of the y (i.e., y=2) th column of the x (i.e., x=4) th row is the target initial pixel 21, and the target initial pixel 21 is located in the reserved row 212, and the target initial pixel 21 is adjacent to the removal row 211. The pixel 30 formed by processing the target initial pixel 21 is a target pixel 31. The value of the target pixel 31 is determined according to the value of the initial pixel 20 in the y (i.e., y=2) th row x-1 (i.e., x-1=4-1=3) and the value of the initial pixel 20 in the y (i.e., y=2) th row x+1 (i.e., x+1=4+1=5). Wherein the x-1 row of initial pixel dots 20 is located in the removal row 211.x is a positive integer greater than 1, and y is a positive integer. In other embodiments, the x+1th row of the initial pixel dots 20 may be located in the removal row 211. So long as at least one of the x-1 th row of initial pixel points 20 and the x+1 th row of initial pixel points 20 is located in the removal row 211.
Illustratively, the value of the target pixel 31 is determined from the average of the value of the initial pixel 20 of the x-1 row and y-th column and the value of the initial pixel 20 of the x+1 row and y-th column.
Alternatively, referring to fig. 2 and 3, x=4 and y=2 are taken as examples. The value of the target pixel 31 is determined according to the value of the initial pixel 20 in the y (i.e., y=2) th row x-1 (i.e., x-1=4-1=3) and the value of the initial pixel 20 in the y (i.e., y=2) th row x-2 (i.e., x-2=4-2=2). Wherein the x-1 row of initial pixel dots 20 is located in the removal row 211.x is a positive integer greater than 2 and y is a positive integer.
Illustratively, the value of the target pixel 31 is calculated according to the trend of the value of the initial pixel 20 in the x-1 row and the y-th column and the value of the initial pixel 20 in the x-2 row and the y-th column, for example, the difference between the value of the target pixel 31 and the value of the initial pixel 20 in the x-1 row and the y-th column is equal to the difference between the value of the initial pixel 20 in the x-1 row and the value of the initial pixel 20 in the x-2 row and the y-th column.
Fig. 4 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 5 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 4, and referring to fig. 4 and fig. 5, taking m=8, n=4, and h=6 as examples. 2 (i.e., M-h=8-6=2) removal lines 211 in the initial pixel point line 201 are removed, and 6 initial pixel point lines 201 are reserved as reserved lines 212. Adjacent 4 (i.e., M/p=8/2=4) initial pixel point rows 201 form an initial pixel point row group 200, and each initial pixel point row group 200 includes 1 (i.e., M/P-H/p=8/2-6/2=1) removal rows 211. After the initial pixel points 20 in 8 rows and 4 columns are processed by the processing unit, the initial pixel points 20 in 6 rows and 4 columns are output, and the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Fig. 6 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 7 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 6, and referring to fig. 6 and fig. 7, taking m=8, n=4, and h=4 as an example. 4 (i.e., M-h=8-4=4) removal lines 211 in the initial pixel point line 201 are removed, and 4 initial pixel point lines 201 are reserved as reserved lines 212. Adjacent 2 (i.e., M/p=8/4=2) initial pixel point rows 201 form an initial pixel point row group 200, and each initial pixel point row group 200 includes 1 (i.e., M/P-H/p=8/4-4/4=1) removal rows 211. After the initial pixel points 20 in 8 rows and 4 columns are processed by the processing unit, the pixel points 30 in 4 rows and 4 columns are output, and the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Illustratively, referring to fig. 6 and 7,J = (M/(M-H)) -1 = (8/(8-4) -1) = 1, in the second direction, two adjacent removal lines 211 are separated by 1 retention line 212. The arrangement of the removed rows 211 along the second direction is relatively uniform, and as the fingerprint information carried by the initial pixel points 20 removed by the removed rows 211 does not affect the final fingerprint identification precision, the degree of information distortion is reduced.
Fig. 8 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, and fig. 9 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 8, and referring to fig. 8 and fig. 9, taking m=12 and n= 8,H =8 as an example. 4 (i.e., M-h=12-8=4) removal lines 211 in the initial pixel point line 201 are removed, and 8 initial pixel point lines 201 are reserved as reserved lines 212. Adjacent 3 (i.e., M/p=12/4=3) initial pixel point rows 201 form an initial pixel point row group 200, and each initial pixel point row group 200 includes 1 (i.e., M/P-H/p=12/4-8/4=1) removal rows 211. After the initial pixel points 20 in 12 rows and 8 columns are processed by the processing unit, the initial pixel points 20 in 8 rows and 8 columns are output as the pixel points 30 in 8 rows and 8 columns, and the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Illustratively, referring to fig. 8 and 9,J = (M/(M-H)) -1 = (12/(12-8) -1) = 2, in the second direction, two adjacent removal lines 211 are separated by 2 retention lines 212. The arrangement of the removed rows 211 along the second direction is relatively uniform, and as the fingerprint information carried by the initial pixel points 20 removed by the removed rows 211 does not affect the final fingerprint identification precision, the degree of information distortion is reduced.
Fig. 10 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 11 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 10, and referring to fig. 10 and 11, taking m=10, n=4, and h=6 as an example. 4 (i.e., M-h=10-6=4) removal lines 211 in the initial pixel point line 201 are removed, and 6 initial pixel point lines 201 are reserved as reserved lines 212. Adjacent 5 (i.e., M/p=10/2=5, p=2) initial pixel point rows 201 form an initial pixel point row group 200, and each initial pixel point row group 200 includes 2 (i.e., M/P-H/p=10/2-6/2=2) removal rows 211. After the initial pixel points 20 in 10 rows and 4 columns are processed by the processing unit, the pixel points 30 in 6 rows and 4 columns are output, and the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Fig. 12 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 13 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 12, and referring to fig. 12 and 13, the processing unit outputs M rows and G columns of pixels 30, and a plurality of pixels 30 arranged along the second direction form a pixel column 202. The pixel point columns 202 in the pixel points 30 of M rows and N columns generated by the processing unit are original columns 222, and the newly added (G-N) pixel point columns 202 are newly added columns 221. Adjacent G/Q pixel columns 202 form a pixel column group 300, each pixel column group 300 including (G/Q-N/Q) additional columns 221. Wherein Q is the greatest common divisor of N and G, and Q is a positive integer. In the embodiment of the present invention, in each pixel column group 300, (G/Q-N/Q) new columns 221 are added, and the number of the new columns 221 of each pixel column group 300 is the same, so that the new columns 221 are uniformly arranged along the first direction, that is, the fingerprint information carried by the pixels 30 newly added along with the new columns 221 has less influence on the final fingerprint identification precision.
The value of the pixel 30 in the original column 222 may be the same as the value of the corresponding initial pixel 20, that is, more pixel columns are formed by inserting values between columns formed by the original initial pixel 20.
For example, referring to fig. 12 and 13, m=8, n=6, g=8 are taken as examples. The original 8 rows and 6 columns of initial pixel points 20 are used as original columns 222 by 6 pixel point columns 202 generated by the processing unit, and 2 (i.e., G-n=8-6=2) new columns 221 are added on the basis of the original columns 222. Adjacent 4 (i.e., G/q=8/2=4) pixel columns 202 constitute one pixel column group 300, and each pixel column group 300 includes 1 (i.e., G/Q-N/q=8/2-6/2=1) newly added columns 221. Wherein the greatest common divisor of 8 and 6 is 2, i.e., q=2. The initial pixel points 20 of 8 rows and 6 columns are processed by the processing unit and output as the pixel points 30 of 8 rows and 8 columns, and the number of the pixel points 30 in the first direction and the second direction in unit length is equal, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
In the actual fingerprint identifier, a large number of fingerprint identification units 10 may be provided, for example, 180 fingerprint identification units 10 are provided in the first direction and 240 fingerprint identification units 10 are provided in the second direction in a unit length. At this time, m=240, n=180, taking g=240 as an example, q=60, and adjacent 4 (i.e., G/q=240/60=4) pixel columns 202 constitute one pixel column group 300, and each pixel column group 300 includes 1 (i.e., G/Q-N/q=240/60-180/60=1) additional columns 221. After being processed by the processing unit, the pixel points 30 with 240 rows and 240 columns are output, and the number of the pixel points 30 in the first direction and the second direction in the unit length is equal.
Alternatively, referring to fig. 12 and 13, in the first direction, two newly added columns 221 are spaced apart by at least one original column 222. Thus, avoiding the continuous setting of the new added column 221 is beneficial to setting the numerical value of the pixel point 30 in the new added column 221 according to the initial pixel point 20 corresponding to the pixel point 30 in the original column 222.
Alternatively, referring to fig. 12 and 13, in the first direction, K original columns 222 are spaced between two adjacent newly added columns 221. K= (G/(G-N)) -1. Wherein K is a positive integer. In the embodiment of the present invention, the adjacent new columns 221 are spaced apart from each other by K original columns 222 along the first direction as a whole. The newly added columns 221 are uniformly arranged along the first direction, that is, the fingerprint information carried by the pixel points 30 newly added along with the newly added columns 221 has less influence on the final fingerprint identification precision.
Illustratively, referring to fig. 12 and 13, m=8, n=6, g= 8,K = (8/(8-6) -1) =3. In the first direction, 3 original columns 222 are spaced between two adjacent newly added columns 221.
Alternatively, referring to fig. 12 and 13, the first pixel column 202 and the last pixel column 202 in the pixel column group 300 are both the original columns 222. That is, pixel columns 202 at both ends of the pixel column group 300 are reserved, and one or more pixel columns 202 are added therebetween. Thus, the fingerprint information carried by the first pixel column 202 and the last pixel column 202 is reserved, the fingerprint information at two ends of the pixel column group 300 is reserved, one or more pixel columns 202 are added in the middle, the middle transition fingerprint information is added, and the effect of the addition of the middle transition information on the final fingerprint identification precision is small.
Alternatively, referring to fig. 12 and 13, taking i= 4,j =3 as an example, the pixel point 30 of the j (i.e., j=3) th column of the i-th (i.e., i=4) row is the target pixel point 31, and the target pixel point 31 is located in the new column 221. The value of the target pixel 31 is determined based on the value of the pixel 30 in the j-1 (i.e., j-1=3-1=2) th column of the i (i.e., i=4) th row and the value of the pixel 30 in the j+1 (i.e., j+1=3+1=4) th column of the i (i=4) th row. The j-th row of pixels 30 is located in the new row 221.i is a positive integer and j is a positive integer greater than 1.
Illustratively, the value of the target pixel 31 is determined based on the value of the pixel 30 in the j-1 th column of the i-th row and the value of the pixel 30 in the j+1 th column of the i-th row.
Alternatively, referring to fig. 12 and 13, x=4 and y=3 are taken as examples. The value of the target pixel 31 is determined according to the value of the pixel 30 in the j-1 (i.e., j-1=3-1=2) th column of the i (i.e., i=4) th row and the value of the pixel 30 in the j-2 (i.e., j-2=3-2=1) th column of the 4 th row. The j-th row of pixels 30 is located in the new row 221.i is a positive integer and j is a positive integer greater than 2.
Illustratively, the value of the target pixel 31 is calculated according to the change trend of the value of the pixel 30 in the j-1 th column of the i-th row and the value of the pixel 30 in the j-2 th column of the i-th row, for example, the difference between the value of the target pixel 31 and the value of the pixel 30 in the j-1 th column of the i-th row is equal to the difference between the value of the pixel 30 in the j-1 th column of the i-th row and the value of the pixel 30 in the j-2 th column of the i-th row.
Fig. 14 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 15 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 14, and referring to fig. 14 and 15, taking m=8, n=4, and g=6 as an example. The original 8 rows and 4 columns of initial pixel points 20 are used as original columns 222 by 4 pixel point columns 202 generated by the processing unit, and 2 (i.e., G-n=6-4=2) new columns 221 are added. Adjacent 3 (i.e., G/q=6/2=3) pixel columns 202 constitute one pixel column group 300, and each pixel column group 300 includes 1 (i.e., G/Q-N/q=6/2-4/2=1) newly added columns 221. Wherein the greatest common divisor of 4 and 6 is 2, i.e., q=2. After the initial pixel points 20 in 8 rows and 4 columns are processed by the processing unit, the initial pixel points 20 in 8 rows and 6 columns are output as pixel points 30, and the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Fig. 16 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 17 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 16, and referring to fig. 16 and 17, taking m=8, n=4, and g=8 as an example. The original 8 rows and 4 columns of initial pixel points 20 are used as original columns 222 by 4 pixel point columns 202 generated by the processing unit, and 4 (i.e., G-n=8-4=4) new columns 221 are added. Adjacent 2 (i.e., G/q=8/4=2) pixel columns 202 constitute one pixel column group 300, and each pixel column group 300 includes 1 (i.e., G/Q-N/q=8/4-4/4=1) newly added columns 221. Wherein the greatest common divisor of 4 and 8 is 4, i.e., q=4. After the initial pixel points 20 in 8 rows and 4 columns are processed by the processing unit, the initial pixel points 20 in 8 rows and 8 columns are output as pixel points 30, and the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Illustratively, referring to fig. 16 and 17, k= (G/(G-N)) -1= (8/(8-4) -1) =1, and in the first direction, 1 original column 222 is spaced between two adjacent newly added columns 221. The newly added columns 221 are uniformly arranged along the first direction, that is, the fingerprint information carried by the pixel points 30 newly added along with the newly added columns 221 has less influence on the final fingerprint identification precision.
Fig. 18 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 19 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 18, and referring to fig. 18 and 19, taking m=12, n=8, and g=12 as an example. The original 12 rows and 8 columns of initial pixel points 20 are used as original columns 222 by 8 pixel point columns 202 generated by the processing unit, and 4 (i.e., G-n=12-8=4) new columns 221 are added. Adjacent 3 (i.e., G/q=12/4=3) pixel columns 202 constitute one pixel column group 300, and 1 (i.e., G/Q-N/q=12/4-8/4=1) new columns 221 are included in each pixel column group 300. Wherein the greatest common divisor of 12 and 8 is 4, i.e., q=4. After the initial pixel points 20 in 12 rows and 8 columns are processed by the processing unit, the initial pixel points 20 in 12 rows and 12 columns are output as pixel points 30, and the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, so that the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Illustratively, referring to fig. 18 and 19, k= (G/(G-N)) -1= (12/(12-8) -1) =2, and in the first direction, two newly added columns 221 are separated by 2 original columns 222. The newly added columns 221 are arranged relatively uniformly in the first direction.
Fig. 20 is a schematic diagram of another arrangement of initial pixels provided in an embodiment of the present invention, fig. 21 is a schematic diagram of an arrangement of pixels corresponding to the initial pixels shown in fig. 20, and referring to fig. 20 and 21, taking m=10, n=6, and g=10 as an example. The original 10 rows and 6 columns of initial pixel points 20 are used as original columns 222 by 6 pixel point columns 202 generated by the processing unit, and 4 (i.e., G-n=10-6=4) new columns 221 are added. Adjacent 5 (i.e., G/q=10/2=5) pixel columns 202 constitute one pixel column group 300, and each pixel column group 300 includes 2 (i.e., G/Q-N/q=10/2-6/2) newly added columns 221. Wherein the greatest common divisor of 10 and 6 is 2, i.e., q=2. The initial pixel points 20 in 10 rows and 6 columns are processed by the processing unit and output as the pixel points 30 in 10 rows and 10 columns, so that the number difference of the pixel points 30 in the first direction and the second direction in unit length is reduced, the condition of fingerprint deformation is improved, and the effective rate of fingerprint identification is improved.
Fig. 22 is a schematic view illustrating another arrangement of initial pixels according to an embodiment of the present invention, and fig. 23 is a schematic view illustrating an arrangement of pixels corresponding to the initial pixels shown in fig. 22, and referring to fig. 1, fig. 22 and fig. 23, a fingerprint identifier includes a plurality of fingerprint identification units 10 arrayed along a first direction and a second direction. In the first direction, N fingerprint recognition units 10 are provided per unit length. In the second direction, M fingerprint recognition units 10 are provided per unit length. That is, the fingerprint identifier includes M rows and N columns of fingerprint identification units 10 arranged in the first direction and the second direction. Wherein M > N, the first direction crosses the second direction. The plurality of fingerprint recognition units 10 arranged in the first direction constitute a fingerprint recognition unit row, and the (M-H) fingerprint recognition unit rows are controlled to be inoperative. The fingerprint identifier further comprises a processing unit, and the processing unit is electrically connected with the fingerprint identification unit 10 and is used for generating the N initial pixel points 20 in the H rows and the N columns according to the electric signals transmitted by the fingerprint identification unit 10, and outputting the N pixel points in the H rows and the N columns after processing. Wherein M is more than H and equal to or greater than N, M, N, H are all positive integers.
The embodiment of the invention adopts the same inventive concept as the embodiment, and improves the condition of fingerprint deformation and the effective rate of fingerprint identification by reducing the difference of the number of the pixel points 30 in the first direction and the second direction in unit length. The difference from the above embodiment is that the embodiment of the present invention reduces the number of rows formed by the generated initial pixel points 20 by controlling (M-H) fingerprint identification unit rows to be inactive, thereby reducing the number of rows formed by the pixel points corresponding to the initial pixel points 20.
Fig. 24 is a schematic top view of a display device according to an embodiment of the invention, fig. 25 is a schematic cross-sectional view along AA' in fig. 24, and referring to fig. 24 and fig. 25, the display device includes a fingerprint sensor 500 and a display panel 400 according to any embodiment of the invention.
Illustratively, referring to fig. 24 and 25, the fingerprint identifier 500 is integrated in the display panel 400. The display panel 400 may further include a counter substrate 430, the counter substrate 430 being opposite to the substrate 410. The opposite substrate 430 may be a color film substrate or a package substrate. The pixel unit 420 is located between the substrate 410 and the opposite substrate 430. The fingerprint identifier 500 is located between the substrate 410 and the opposite substrate 430.
Illustratively, referring to fig. 24 and 25, both the fingerprint identifier 500 and the pixel unit 420 are located on the substrate 410. The fingerprint recognition unit 10 and the pixel unit 420 in the fingerprint recognizer 500 may be disposed at the same layer or at different layers.
In other embodiments, the fingerprint sensor 500 may be disposed on the opposite substrate 430, and since the opposite substrate 430 is touched by a touching subject (e.g., a finger) during fingerprint recognition, the fingerprint sensor 500 may be disposed on the opposite substrate 430, so that the intensity of the reflected light of the fingerprint received by the fingerprint recognition unit 10 may be increased, and the fingerprint recognition accuracy may be improved.
Fig. 26 is a schematic cross-sectional view of another display device according to an embodiment of the present invention, and referring to fig. 26, a fingerprint sensor 500 is disposed outside a display panel 400, that is, the fingerprint sensor 500 and the display panel 400 are separately disposed. The fingerprint identifier 500 is located on the side of the substrate 410 remote from the pixel cells 420.
Illustratively, referring to fig. 26, the fingerprint identifier 500 may further include a fingerprint substrate 510, with the fingerprint identification unit 10 being located on the fingerprint substrate 510 and between the fingerprint substrate 510 and the substrate 410.
In other embodiments, the fingerprint identifier may be applied to devices other than the display device, that is, may be applied to devices without a display function, for example, the fingerprint identifier may be applied to an access lock and be used as an input device of the access lock.
The type of the display panel 400 is not limited in the embodiments of the present invention, and may be an organic light emitting display panel, a liquid crystal display panel, a quantum dot display panel, a micro light emitting diode display panel, or the like.
Illustratively, referring to fig. 24, the display panel 400 includes a substrate 410 and a plurality of pixel units 420 located at one side of the substrate 410. The plurality of pixel units 420 are arranged in an array along the first direction and the second direction. Each pixel unit 420 corresponds to one fingerprint recognition unit 10. The fingerprint recognition unit 10 and the pixel unit 420 are disposed in one-to-one correspondence. The fingerprint identification units 10 are uniformly distributed in all display areas of the display panel 400, and the embodiment of the invention realizes the full-screen fingerprint identification of the display device.
In other embodiments, a plurality of pixel units 420 may also be provided with one fingerprint recognition unit 10 correspondingly.
In other embodiments, the display panel includes a fingerprint recognition area in which the fingerprint recognizer 500 is located, the fingerprint recognition area being located in the display area, and the area of the fingerprint recognition area being smaller than that of the display area. The embodiment of the invention realizes the fingerprint identification of the specific display area of the display device.
In other embodiments, the display panel includes a fingerprint recognition area in which the fingerprint recognizer 500 is located, and a non-display area in which the fingerprint recognition area is located. The embodiment of the invention realizes fingerprint identification of the non-display area of the display device.
Fig. 27 is a schematic top view of a display panel according to an embodiment of the invention, and optionally, referring to fig. 24 and 27, a display panel 400 includes a plurality of data lines 432 and a plurality of scan lines 431. The plurality of data lines 432 are arranged along the first direction, and the plurality of scan lines 431 are arranged along the second direction. In other embodiments, it may also be provided that: the plurality of data lines 432 are arranged along the second direction, and the plurality of scan lines 431 are arranged along the first direction.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (14)
1. The fingerprint identifier is characterized by comprising a plurality of fingerprint identification units which are arrayed along a first direction and a second direction; along the first direction, N fingerprint identification units are arranged in a unit length, along the second direction, M fingerprint identification units are arranged in a unit length, M is larger than N, and the first direction and the second direction are crossed;
The processing unit is electrically connected with the fingerprint identification unit and is used for generating M rows and N columns of initial pixel points according to the electric signals transmitted by the fingerprint identification unit, and outputting H rows and N columns of pixel points or outputting M rows and G columns of pixel points after processing; wherein M is more than or equal to G and more than or equal to N, M is more than or equal to H and more than or equal to N, M, N, G, H are positive integers;
the processing unit outputs N pixel points in H rows and N columns;
a plurality of initial pixel points arranged along the first direction form an initial pixel point row;
the (M-H) initial pixel point behaviors are removed, and the H initial pixel point behaviors are reserved;
Adjacent M/P initial pixel point rows form an initial pixel point row group, and each initial pixel point row group comprises (M/P-H/P) removal rows;
Wherein P is the greatest common divisor of M and H, and P is a positive integer;
or the processing unit outputs M rows and G columns of pixel points;
a plurality of pixel points arranged along the second direction form a pixel point column;
The pixel point columns in the initial pixel points of M rows and N columns generated by the processing unit are original columns; after being processed by the processing unit, the newly added (G-N) pixel point columns are newly added columns;
Adjacent G/Q pixel point columns form a pixel point column group, and each pixel point column group comprises (G/Q-N/Q) newly added columns;
Wherein Q is the greatest common divisor of N and G, and Q is a positive integer.
2. A fingerprint identifier according to claim 1, wherein at least one of said reserved rows is spaced between two adjacent said removal rows in said second direction.
3. A fingerprint identifier according to claim 2, wherein in said second direction, two adjacent said removed rows are separated by J said reserved rows;
J＝(M/(M-H))-1；
Wherein J is a positive integer.
4. The fingerprint identifier of claim 1, wherein a first one of the initial pixel rows and a last one of the initial pixel rows in the initial pixel row group are both the reserved rows.
5. The fingerprint identifier of claim 1, wherein the initial pixel point of the x-th row and y-th column is a target initial pixel point, the target initial pixel point being located in the reserved row and adjacent to the removal row;
The value of the pixel point formed after the target initial pixel point is processed is determined according to the value of the initial pixel point of the x-1 row and the y column and the value of the initial pixel point of the x+1th row and the y column;
the initial pixel points of the x-1 row are positioned in the removing row, and/or the initial pixel points of the x+1 row are positioned in the removing row; x is a positive integer greater than 1, and y is a positive integer.
6. The fingerprint identifier of claim 1, wherein the initial pixel point of the x-th row and y-th column is a target initial pixel point, the target initial pixel point being located in the reserved row and adjacent to the removal row;
the value of the pixel point formed after the target initial pixel point is processed is determined according to the value of the initial pixel point of the x-1 row and the y column and the value of the initial pixel point of the x-2 row and the y column;
the initial pixel points in the x-1 row are positioned in the removing row; x is a positive integer greater than 2 and y is a positive integer.
7. The fingerprint identifier of claim 1, wherein at least one of said original columns is spaced between two adjacent said newly added columns in said first direction.
8. The fingerprint identifier of claim 7, wherein K of said original columns are spaced between two adjacent said newly added columns in said first direction;
K＝(G/(G-N))-1；
Wherein K is a positive integer.
9. The fingerprint identifier of claim 1, wherein the first and last pixel columns of the set of pixel columns are the original columns.
10. The fingerprint identifier of claim 1, wherein the pixel point of the ith row and the jth column is a target pixel point, and the target pixel point is located in the newly added column;
The value of the target pixel point is determined according to the value of the pixel point of the j-1 th column of the ith row and the value of the pixel point of the j+1 th column of the ith row;
Wherein i is a positive integer, and j is a positive integer greater than 1.
11. The fingerprint identifier of claim 1, wherein the pixel point of the ith row and the jth column is a target pixel point, and the target pixel point is located in the newly added column;
the value of the target pixel point is determined according to the value of the pixel point of the j-1 th column of the ith row and the value of the pixel point of the j-2 nd column of the ith row;
Wherein i is a positive integer, and j is a positive integer greater than 2.
12. The fingerprint identifier is characterized by comprising a plurality of fingerprint identification units which are arrayed along a first direction and a second direction; along the first direction, N fingerprint identification units are arranged in a unit length, along the second direction, M fingerprint identification units are arranged in a unit length, M is larger than N, and the first direction and the second direction are crossed;
A plurality of fingerprint identification units arranged along the first direction form a fingerprint identification unit row, and the fingerprint identification unit row (M-H) is controlled to be not operated;
The processing unit is electrically connected with the fingerprint identification unit and is used for generating N columns of H rows and N columns of initial pixel points according to the electric signals transmitted by the fingerprint identification unit, and outputting the N columns of H rows and N columns of pixel points after processing;
Wherein M is more than H and equal to or greater than N, M, N, H are all positive integers.
13. A display device comprising a fingerprint identifier as claimed in any one of claims 1-12, and a display panel.
14. The display device according to claim 13, wherein the display panel includes a plurality of data lines and a plurality of scan lines;
the data lines are arranged along a first direction, and the scanning lines are arranged along a second direction; or alternatively
The data lines are arranged along the second direction, and the scanning lines are arranged along the first direction.
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| CN111126260B (en) * | 2019-12-23 | 2022-08-16 | 厦门天马微电子有限公司 | Fingerprint identification method of display device, display device and electronic equipment |
| CN111144268B (en) * | 2019-12-23 | 2022-09-20 | 厦门天马微电子有限公司 | Fingerprint identification method of display panel, display panel and display device |
| WO2021237524A1 (en) * | 2020-05-27 | 2021-12-02 | 深圳市汇顶科技股份有限公司 | Fingerprint recognition apparatus and electronic device |
| CN112132072B (en) * | 2020-09-27 | 2024-02-20 | 深圳市汇顶科技股份有限公司 | Fingerprint identification method and device and electronic equipment |
| CN112666746B (en) * | 2020-12-31 | 2023-03-24 | 厦门天马微电子有限公司 | Display panel, display device and display method |
| CN114019739B (en) * | 2021-11-22 | 2024-02-13 | 福州京东方光电科技有限公司 | Display substrate, display panel and fingerprint identification method |
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