CN107919059B - Display substrate, display panel and display device - Google Patents
Display substrate, display panel and display device Download PDFInfo
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- CN107919059B CN107919059B CN201711098791.6A CN201711098791A CN107919059B CN 107919059 B CN107919059 B CN 107919059B CN 201711098791 A CN201711098791 A CN 201711098791A CN 107919059 B CN107919059 B CN 107919059B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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Abstract
The invention discloses a display substrate, a display panel and a display device, which belong to the technical field of display and comprise: a display area and a non-display area; the display area includes: a plurality of first signal lines and a plurality of second signal lines; a fingerprint sensor; the first signal line and the second signal line are electrically connected with the fingerprint sensor; the non-display area also comprises a plurality of first signal line connecting lines; the display substrate comprises a plurality of first signal line groups; the plurality of first signal line connecting lines comprise a first connecting lines; at least two nonadjacent first signal line groups are respectively a first signal line group A and a first signal line group B; the first signal lines in the first signal line group A are electrically connected with the a first connecting lines in a one-to-one correspondence mode, and the first signal lines in the first signal line group B are electrically connected with the a first connecting lines in a one-to-one correspondence mode; wherein a is a positive integer. The number of the first signal line connecting lines can be reduced, so that the area of a non-display area is reduced, and the narrow-frame design of the display substrate is facilitated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a display panel and a display device.
Background
With the development of display technology and the importance of users on personal information security, the security of personal information by display devices becomes an increasingly important performance index. Fingerprint identification is an identity authentication mode with higher reliability, and the personal information safety of a user of the display device can be effectively ensured through fingerprint identification.
In a display device provided in the prior art, a fingerprint recognition sensor is provided. Referring to fig. 1, the display device shown in fig. 1 includes a display panel 01 and a housing 02, the display panel 01 has a display area and a non-display area, wherein the non-display area is usually shielded by the housing 02. The fingerprint sensor is disposed in the fingerprint identification area 03, and the fingerprint identification area 03 is disposed separately from the display area of the display panel 01. By opening the housing 02 by an opening process, the fingerprint recognition module including the fingerprint recognition sensor is placed at the opening position, and a process of aligning and assembling the fingerprint recognition module needs to be added.
However, the fingerprint identification area 03 is not suitable for the narrow frame design of the display device. Moreover, the opening in the housing 02 may reduce the structural rigidity of the display device, and dust, water, and the like may easily enter the display device through the opening, thereby affecting the performance of electronic components inside the display device and reducing the reliability of the display device.
Disclosure of Invention
In view of the foregoing, the invention provides a display substrate, a display panel and a display device.
The present invention provides a display substrate, comprising: a display area and a non-display area surrounding the display area; the display area includes: a plurality of first signal lines extending along a first direction and arranged along a second direction, and a plurality of second signal lines extending along the second direction and arranged along the first direction; the plurality of first signal lines and the plurality of second signal lines are crossed and insulated to define a plurality of first areas; the first area comprises a fingerprint sensor, and the fingerprint sensor is used for identifying fingerprint information; the first signal line and the second signal line are electrically connected with the fingerprint sensor; the non-display area also comprises a plurality of first signal wire connecting wires, and the first signal wires are electrically connected with the signal processing unit through the first signal wire connecting wires; the display substrate comprises a plurality of first signal line groups, wherein each first signal line group comprises a first signal lines; the plurality of first signal line connecting lines comprise a first connecting lines; at least two nonadjacent first signal line groups exist, wherein the two nonadjacent first signal line groups are a first signal line group A and a first signal line group B respectively; the first signal lines in the first signal line group A are electrically connected with the a first connecting lines in a one-to-one correspondence mode, and the first signal lines in the first signal line group B are electrically connected with the a first connecting lines in a one-to-one correspondence mode; wherein a is a positive integer.
The invention also provides a display panel comprising the display substrate provided by the invention.
The invention also provides a display device which comprises the display panel provided by the invention.
Compared with the prior art, the display substrate, the display panel and the display device provided by the invention at least realize the following beneficial effects:
according to the display substrate, the display panel and the display device, the fingerprint sensor is arranged in the display area, and the fingerprint identification module does not need to be additionally arranged in the non-display area, so that the alignment assembly process of the fingerprint identification module can be reduced, the manufacturing efficiency and yield of the display substrate are improved, and the narrow-frame design of the display substrate is facilitated.
In addition, because the manufacturing of fingerprint sensor can be integrated in the manufacturing process of display substrate, need not in display device opening in order to assemble fingerprint identification module, can avoid opening technology to the structural rigidity's that shows to set up harmful effects, can avoid dust, water stain etc. to get into inside the display device simultaneously, can promote the inside electronic component's of display device stability to improve display device's reliability.
In addition, the display substrate, the display panel and the display device provided by the invention comprise at least two nonadjacent first signal line groups, wherein the two nonadjacent first signal line groups are respectively a first signal line group A and a first signal line group B; the first signal lines in the first signal line group A are electrically connected with the a first connecting lines in a one-to-one correspondence mode, and the first signal lines in the first signal line group B are electrically connected with the a first connecting lines in a one-to-one correspondence mode. The first signal line group A and the first signal line group B share a first connecting lines, a first connecting lines do not need to be arranged for the first signal line group A and the first signal line group B respectively, the number of the first signal line connecting lines can be reduced, the area of a non-display area is reduced, and the narrow-frame design of the display substrate is facilitated.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a display device provided in the prior art;
fig. 2 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the operation of the display substrate provided in FIG. 6;
FIG. 8 is a schematic diagram of a fingerprint sensor in a display substrate according to an embodiment of the present invention;
FIG. 9 is a circuit diagram of another fingerprint sensor in a display substrate according to an embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of the fingerprint sensor provided in FIG. 9;
FIG. 11 is a schematic view of a partial structure of another display substrate according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a display substrate according to an embodiment of the present invention. The embodiment provides a display substrate, including: a display area AA and a non-display area BB surrounding the display area AA; the display area AA includes: a plurality of first signal lines 10 extending in a first direction x and arranged in a second direction y, and a plurality of second signal lines 20 extending in the second direction y and arranged in the first direction x; the plurality of first signal lines 10 and the plurality of second signal lines 20 are crossed and insulated to define a plurality of first areas 21; the first area 21 includes a fingerprint sensor 40, the fingerprint sensor 40 for recognizing fingerprint information; the first signal line 10 and the second signal line 20 are electrically connected to the fingerprint sensor 40; the non-display area BB further comprises a plurality of first signal line connection lines 30, and the first signal lines 10 are electrically connected to a signal processing unit (not shown in the figure) through the first signal line connection lines 30; the display substrate includes a plurality of first signal line groups 100, each of the first signal line groups 100 including a first signal lines 10; the plurality of first signal line connection lines 30 includes a first connection lines 31; at least two non-adjacent first signal line groups 100 exist, and the two non-adjacent first signal line groups 100 are a first signal line group A101 and a first signal line group B102 respectively; the first signal lines 10 in the first signal line group A101 are electrically connected with a first connecting lines 31 in a one-to-one correspondence manner, and the first signal lines 10 in the first signal line group B102 are electrically connected with a first connecting lines 31 in a one-to-one correspondence manner; wherein a is a positive integer.
The display substrate provided by the embodiment can be used for realizing a display function, and comprises a display area AA and a non-display area BB. The display area AA may be used to dispose a part of the structure of the pixels, and the non-display area BB may be used to dispose the structure of the traces or the electronic components.
The display area AA includes a first signal line 10 and a second signal line 20. The first signal line 10 and the second signal line 20 are made of conductive materials and are used for transmitting electrical signals. The first signal line 10 extends in a first direction x, the second signal line 20 extends in a second direction y, and the first direction x and the second direction y intersect; optionally, the first direction x and the second direction y are perpendicular. In the display substrate shown in fig. 2, only 5 first signal lines 10 and 5 second signal lines 20 are taken as an example for description, and it is understood that the number of the first signal lines 10 and the number of the second signal lines 20 need to be set according to specific design requirements of the display substrate, and this embodiment does not specifically limit this.
The display substrate provided by the present embodiment further includes a plurality of first areas 21, the first areas 21 are defined by the first signal lines 10 and the second signal lines 20 crossing and insulated from each other, and since the first signal lines 10 and the second signal lines 20 are disposed in the display area AA, the plurality of first areas 21 are also in the display area AA. A fingerprint sensor 40 is located in the first area 21, the fingerprint sensor 40 being used to identify fingerprint information.
Specifically, when the user touches the display substrate with a finger, the fingerprint sensor 40 may identify the touch information through a change in capacitance of the fingerprint sensor, a change in light, and the like. Since the concave-convex degree and the concave-convex shape of the fingerprints at different positions on the finger are different, and the variation amounts of the factors such as the capacitance and the light recognized by the fingerprint sensors 40 corresponding to different positions of the finger are different, the information of the plurality of fingerprint sensors 40 is analyzed, and the specific fingerprint information of the user can be obtained. It should be noted that there are various working principles of the fingerprint sensor 40, for example, optionally, the fingerprint sensor 40 may also identify fingerprint information through a change in temperature, and the present embodiment does not specifically limit the working principle and the specific structure of the fingerprint sensor 40.
In this embodiment, fingerprint sensor 40 sets up in display area AA, for prior art, need not additionally to set up fingerprint identification module in the non-display area, not only can reduce the counterpoint assembly process to fingerprint identification module, promotes display substrate's manufacturing efficiency and yield, still is favorable to display substrate's narrow frame design. In addition, because the manufacturing of fingerprint sensor can be integrated in the manufacturing process of display substrate, need not in display device opening in order to assemble fingerprint identification module, can avoid opening technology to the structural rigidity's that shows to set up harmful effects, can avoid dust, water stain etc. to get into inside the display device simultaneously, can promote the inside electronic component's of display device stability to improve display device's reliability.
The fingerprint sensor 40 is electrically connected to the corresponding first and second signal lines 10 and 20, and the first and second signal lines 10 and 20 are used to transmit electrical signals for the fingerprint sensor 40. In the display substrate shown in fig. 2, it is only exemplarily illustrated that the fingerprint sensors 40 located in the same row along the first direction x are electrically connected to the same first signal line 10, and the fingerprint sensors 40 located in the same column along the second direction y are electrically connected to the same second signal line 20, and the present embodiment is not particularly limited to the specific electrical connection relationship between the first signal line 10 and the second signal line 20 and the fingerprint sensor 40.
In the display substrate provided in this embodiment, the non-display area BB is provided with a plurality of first signal line connection lines 30, and the first signal lines 10 are electrically connected to the signal processing unit through the first signal line connection lines 30. Wherein the signal processing unit is used for transmitting the electrical signal to the fingerprint sensor 40 through the first signal line connection line 30 and the first signal line 10. Alternatively, the signal processing unit may be an Integrated Circuit (IC). Generally, the signal processing unit and the display substrate are manufactured separately using different manufacturing processes. Optionally, the signal processing unit may be disposed on the display substrate, or may be disposed in a display device where the display substrate is located, and the specific structure and position of the signal processing unit are not particularly limited in this embodiment.
In this embodiment, the display substrate includes a plurality of first signal line groups 100, each of the first signal line groups 100 including a first signal lines 10; in the display substrate shown in fig. 2, only taking a as 1 as an example, that is, one first signal line group 100 includes 1 first signal line 10. Also, the plurality of first signal line connection lines 30 includes 1 first connection line 31.
In the display substrate provided in this embodiment, at least two non-adjacent first signal line groups 100 exist, and the two non-adjacent first signal line groups 100 are a first signal line group a 101 and a first signal line group b 102, respectively. The first signal line group a 101 and the first signal line group b 102 are not adjacent to each other, in other words, at least one first signal line group 100 is included between the first signal line group a 101 and the first signal line group b 102.
The first signal line 10 in the first signal line group a 101 is electrically connected to 1 first connecting line 31, and the first signal line 10 in the first signal line group b 102 is electrically connected to 1 first connecting line 31. The first connecting line 31 transmits electrical signals to the first signal line group A101 and the first signal line group B102, and since the first signal line group A101 and the first signal line group B102 are not adjacent to each other, a finger can be prevented from simultaneously touching the corresponding areas of the first signal line group A101 and the first signal line group B102. Optionally, the first signal line 10 transmits a driving signal for the fingerprint sensor 40, and the second signal line 20 transmits a sensing signal for the fingerprint sensor 40. If a finger touches the areas corresponding to the first signal line group A101 and the first signal line group B102 at the same time, the first signal line 10 in the first signal line group A101 and the first signal line 10 in the first signal line group B102 transmit driving signals at the same time, and sensing signals of the fingerprint sensor 40 corresponding to the touched area are superposed in the second signal line 20, which may affect the fingerprint identification accuracy. The first signal line group A101 and the first signal line group B102 are arranged to be not adjacent to each other, and fingers are prevented from touching the areas corresponding to the first signal line group A101 and the first signal line group B102 at the same time. When a finger touches an area corresponding to the first signal line group A101 or the first signal line group B102, the signal processing unit receives the sensing signal transmitted by the second signal line 20, and fingerprint information can be identified.
Since the first signal line group a 101 and the first signal line group b 102 share the first connection line 31, there is no need to provide separate first signal line connection lines 30 for the first signal line group a 101 and the first signal line group b 102, respectively. The display substrate shown in fig. 2 includes 5 first signal lines 10, but the number of the first signal line connecting lines 30 is only 4, so that the number of the first signal line connecting lines 30 can be reduced, the area of the non-display area BB can be reduced, and the narrow frame design of the display substrate is facilitated.
In the display substrate that this embodiment provided, with fingerprint sensor setting in the display area, for prior art, need not additionally to set up fingerprint identification module in the non-display area, not only can reduce the equipment technology of counterpointing to fingerprint identification module, promote display substrate's manufacturing efficiency and yield, still be favorable to display substrate's narrow frame design. In addition, because the manufacturing of fingerprint sensor can be integrated in the manufacturing process of display substrate, need not in the display device at display substrate place opening in order to assemble fingerprint identification module, can avoid opening technology to the adverse effect of the structural rigidity that shows to set up, can avoid dust, water stain etc. to get into inside the display device simultaneously, can promote the inside electronic component's of display device stability to improve display device's reliability. In addition, the display substrate comprises at least two nonadjacent first signal line groups, wherein the two nonadjacent first signal line groups are a first signal line group A and a first signal line group B respectively; the first signal lines in the first signal line group A are electrically connected with the a first connecting lines in a one-to-one correspondence mode, and the first signal lines in the first signal line group B are electrically connected with the a first connecting lines in a one-to-one correspondence mode. The first signal line group A and the first signal line group B share a first connecting lines, a first connecting lines do not need to be arranged for the first signal line group A and the first signal line group B respectively, the number of the first signal line connecting lines can be reduced, the area of a non-display area is reduced, and the narrow-frame design of the display substrate is facilitated.
The display substrate shown in fig. 2 is described by taking only an example where a is 1, and optionally, a may be any positive integer of 2 or more. In some optional embodiments, please refer to fig. 3, and fig. 3 is a schematic structural diagram of another display substrate according to an embodiment of the present invention. The reference numerals of fig. 2 are used along with fig. 3, and the description of the same parts is omitted. In the display substrate shown in fig. 3, a is 2 as an example. In this embodiment, the display substrate includes a plurality of first signal line groups 100, each of the first signal line groups 100 includes 2 first signal lines 10, and the plurality of first signal line connection lines 30 includes 2 first connection lines 31.
In some alternative embodiments, with continued reference to fig. 3, the plurality of first signal line groups 100 includes odd first signal line groups 100 and even first signal line groups 100; the first signal lines 10 in the odd-numbered first signal line group 100 are electrically connected to the 2 first connection lines 31 in a one-to-one correspondence. In this embodiment, the plurality of first signal line groups 100 are sequentially arranged along the second direction y. The plurality of first signal line groups 100 includes odd first signal line groups 100 and even first signal line groups 100 according to an arrangement order of the plurality of first signal line groups 100. The 2 first signal lines 10 in the odd-numbered first signal line groups 100 are electrically connected to the 2 first connecting lines 31 in a one-to-one correspondence manner. In the display substrate provided in this embodiment, 2 first connection lines 31 are provided, and the 2 first connection lines 31 can transmit electrical signals for the first signal lines 10 in the odd-numbered first signal line group 100, so as to further reduce the number of the first signal line connection lines 30, thereby reducing the area of the non-display area, and being beneficial to the narrow-frame design of the display substrate.
In some alternative embodiments, with continued reference to FIG. 3, the width of the first signal line group 100 along the second direction y is d1, and d1 ≧ 2 mm. In the display substrate provided in this embodiment, in order to improve the accuracy of fingerprint identification, the width of the first signal line group 100 is at least 2 mm. Since the contact surface of the finger with the display substrate is usually within an area of 4mm × 4mm, the width of the first signal line group 100 is set to be at least 2mm, so that the finger can touch two adjacent first signal line groups 100 at most at the same time without touching three adjacent first signal line groups 100 at the same time.
Since the display substrate provided in this embodiment may have two non-adjacent first signal line groups 100 sharing the first connecting line 31, if a finger touches three adjacent first signal line groups 100 at the same time, the two non-adjacent first signal line groups 100 in the three adjacent first signal line groups 100 may share the first connecting line 31. Optionally, the first signal line 10 transmits a driving signal for the fingerprint sensor 40, and the second signal line 20 transmits a sensing signal for the fingerprint sensor 40. If a finger touches two first signal line groups 100 sharing the first connecting line 31 at the same time, the sensing signals of the fingerprint sensor 40 corresponding to the touch area are superimposed on the second signal line 20, which may affect the accuracy of fingerprint identification.
In some optional embodiments, please refer to fig. 4, where fig. 4 is a schematic structural diagram of another display substrate provided in the embodiments of the present invention. Fig. 4 is only illustrated on the basis of the display substrate provided in fig. 3, and fig. 4 follows the reference numerals of fig. 3. The plurality of first signal line connection lines 30 further includes 2 second connection lines 32; the first signal lines 10 in the even number of first signal line groups 100 are electrically connected to the 2 second connection lines 32 in a one-to-one correspondence. In the display substrate provided in this embodiment, 2 second connection lines 32 are provided, and the 2 second connection lines 32 can transmit electrical signals for the first signal lines 10 in the even number of first signal line groups 100, so as to further reduce the number of the first signal line connection lines 30, thereby reducing the area of the non-display area, and being beneficial to the narrow-frame design of the display substrate.
In some optional embodiments, please refer to fig. 5, and fig. 5 is a schematic structural diagram of another display substrate according to an embodiment of the present invention. Fig. 5 is described only on the basis of the display panel shown in fig. 4. In this embodiment, the display substrate includes a plurality of second signal line groups 200, each second signal line group 200 including b second signal lines 20; wherein b is a positive integer. The present embodiment is described by taking b as an example, that is, each second signal line group 200 includes 2 second signal lines 20. In other alternative implementations, b may be any positive integer such as 1, 3, 4, 5, and the like, and this embodiment is not particularly limited in this regard.
The non-display area BB further comprises a plurality of second signal line connection lines 50, and the second signal lines 20 are electrically connected with the signal processing unit through the second signal line connection lines 50; the plurality of second signal line connection lines 50 includes 2 third connection lines 53; at least two non-adjacent second signal line groups 200 exist, and the two non-adjacent second signal line groups 200 are a second signal line group A201 and a second signal line group B202 respectively; the second signal lines 20 in the second signal line group a 201 are electrically connected to the 2 third connection lines 53 in a one-to-one correspondence, and the second signal lines 20 in the second signal line group b 202 are electrically connected to the 2 third connection lines 53 in a one-to-one correspondence.
In the display substrate shown in fig. 5, the third connection line 53 transmits electrical signals to the second signal line group a 201 and the second signal line group b 202, and since the second signal line group a 201 and the second signal line group b 202 are not adjacent to each other, a finger can be prevented from touching an area corresponding to the second signal line group a 201 and the second signal line group b 202 at the same time. Optionally, the first signal line 10 transmits a driving signal for the fingerprint sensor 40, and the second signal line 20 transmits a sensing signal for the fingerprint sensor 40. If a finger touches two second signal line groups 200 sharing the third connecting line 53 at the same time, the sensing signals of the fingerprint sensor 40 corresponding to the touch area are superimposed in the third connecting line 53, which may affect the fingerprint recognition accuracy.
Since the second signal line group a 201 and the second signal line group b 202 share 2 third connecting lines 53, there is no need to provide independent second signal line connecting lines 50 for the second signal line group a 201 and the second signal line group b 202, respectively. The number of the second signal line connection lines 50 can be reduced, so that the area of the non-display area BB is reduced, which is beneficial to the narrow frame design of the display substrate.
In some optional embodiments, please refer to fig. 6, where fig. 6 is a schematic structural diagram of another display substrate provided in the embodiments of the present invention. Fig. 6 follows the reference numerals of fig. 5. In the present embodiment, the plurality of second signal line groups 200 includes odd-numbered second signal line groups 200 and even-numbered second signal line groups 200; the second signal lines 20 in the odd-numbered second signal line group 200 are electrically connected to the b third connection lines 53 in a one-to-one correspondence. In the display substrate provided in this embodiment, b third connection lines 53 are provided, where b is 2, and 2 third connection lines 53 may transmit electrical signals for the second signal lines 20 in the odd second signal line group 200, so as to further reduce the number of the second signal line connection lines 50, thereby reducing the area of the non-display area, and being beneficial to the narrow-frame design of the display substrate.
In some alternative embodiments, with continued reference to fig. 6, the plurality of second signal line connecting lines 50 further includes 2 fourth connecting lines 54; the second signal lines 20 in the even second signal line group 200 are electrically connected to the b fourth connection lines 54 in a one-to-one correspondence. In the display substrate provided in this embodiment, b fourth connection lines 54 are provided, where b is 2, and 2 fourth connection lines 54 may transmit electrical signals for the second signal lines 20 in the even second signal line group 200, so as to further reduce the number of the second signal line connection lines 50, thereby reducing the area of the non-display area, and being beneficial to the narrow-frame design of the display substrate.
In some alternative embodiments, with continued reference to FIG. 6, the width of the second signal line group 200 along the first direction x is d2, and d2 ≧ 2 mm. In the display substrate provided in this embodiment, in order to improve the accuracy of fingerprint identification, the width of the second signal line group 200 is at least 2 mm. Since the contact surface of the finger with the display substrate is usually within an area of 4mm × 4mm, the width of the second signal line group 200 is set to be at least 2mm, so that the finger can touch two adjacent second signal line groups 200 at most at the same time, and can not touch three adjacent second signal line groups 200 at the same time. Since the display substrate provided in this embodiment may have two non-adjacent second signal line groups 200 sharing the third connecting line 53, if a finger touches three adjacent second signal line groups 200 at the same time, two non-adjacent second signal line groups 200 in the three adjacent second signal line groups 200 may share the third connecting line 53, so that the electrical signals of the second signal lines 20 in the two second signal line groups 200 are superimposed on the shared third connecting line 53, which affects the accuracy of fingerprint identification.
In some alternative embodiments, please refer to fig. 6 and fig. 7 in combination, and fig. 7 is a schematic diagram illustrating an operation principle of the display substrate provided in fig. 6. In this embodiment, the plurality of first signal line groups include odd first signal line groups and even first signal line groups, the first signal lines in the odd first signal line groups are electrically connected to the a first connecting lines in a one-to-one correspondence, and the first signal lines in the even first signal line groups are electrically connected to the a second connecting lines in a one-to-one correspondence. The plurality of second signal line groups comprise odd second signal line groups and even second signal line groups, second signal lines in the odd second signal line groups are electrically connected with the b third connecting lines in a one-to-one correspondence mode, and second signal lines in the even second signal line groups are electrically connected with the b fourth connecting lines in a one-to-one correspondence mode. In this embodiment, a is 2 and b is 2.
The plurality of first signal line groups and the plurality of second signal line groups divide the display into a plurality of areas. The area where the fingerprint sensor electrically connected to the first signal line in the first signal line group is located is area 101, the area where the fingerprint sensor electrically connected to the first signal line in the second first signal line group is located is area 102, and so on, area 103, area 104, and area 105 are the areas where the fingerprint sensors electrically connected to the first signal line groups are located, respectively. The area where the fingerprint sensor electrically connected to the second signal line in the first second signal line group is located is area 201, the area where the fingerprint sensor electrically connected to the second signal line in the second signal line group is located is area 202, and so on, and area 203 and area 204 are the areas where the fingerprint sensors electrically connected to the second signal line groups are located, respectively.
When the finger performs a touch operation on the display substrate, the finger may touch any area in the display area AA, and the display substrate may identify fingerprint information. For example, when fingerprint recognition is required, the finger touches the area F shown in fig. 7, and the area F partially covers the areas 3-1, 3-2, 4-1, and 4-2. Where region 3-1 is the region where region 103 overlaps region 201, region 3-2 is the region where region 103 overlaps region 202, region 4-1 is the region where region 104 overlaps region 201, and region 4-2 is the region where region 104 overlaps region 202.
The first connecting line 31 and the third connecting line 53 are used for transmitting the electric signals of the fingerprint sensors in the area 3-1, and the signal processing unit calculates that partial fingerprint information in the area 3-1 can be obtained.
The first connecting line 31 and the fourth connecting line 54 are used for transmitting the electric signals of the fingerprint sensors in the area 3-2, and the signal processing unit calculates that partial fingerprint information in the area 3-2 can be obtained.
The second connection line 32 and the third connection line 53 are used for transmitting the electrical signals of the fingerprint sensors in the area 4-1, and the signal processing unit calculates that partial fingerprint information in the area 4-1 can be obtained.
The second connection line 32 and the fourth connection line 54 are used for transmitting the electrical signals of the fingerprint sensors in the area 4-2, and the signal processing unit calculates that partial fingerprint information in the area 4-2 can be obtained.
The fingerprint information of the four parts of the area 3-1, the area 3-2, the area 4-1 and the area 4-2 is integrated in the signal processing unit, so that more complete fingerprint information can be obtained, and fingerprint identification is performed.
Optionally, the first signal line 10 transmits a driving signal for the fingerprint sensor 40, and the second signal line 20 transmits a sensing signal for the fingerprint sensor 40. In some alternative driving modes, 2 first connection lines 31 transmit driving signals in a time-sharing manner, sensing signals of second signal lines corresponding to the area 3-1 are transmitted to the signal processing unit through the third connection lines 53, sensing signals of second signal lines corresponding to the area 3-2 are transmitted to the signal processing unit through the fourth connection lines 54, and the signal processing unit calculates that partial fingerprint information in the area 3-1 and partial fingerprint information in the area 3-2 can be obtained. It can be understood that, since the third connection line 53 and the fourth connection line 54 are independent, the signal processing unit can receive the electrical signals of the third connection line 53 and the fourth connection line 54 at the same time, and also can receive the electrical signals of the third connection line 53 and the fourth connection line 54 in a time-sharing manner.
After the 2 first connecting lines 31 complete time-sharing transmission of the driving signals, the 2 second connecting lines 32 time-sharing transmission of the driving signals, the sensing signals of the second signal lines corresponding to the area 4-1 are transmitted to the signal processing unit through the third connecting lines 53, the sensing signals of the second signal lines corresponding to the area 4-2 are transmitted to the signal processing unit through the fourth connecting lines 54, and the signal processing unit calculates to obtain partial fingerprint information in the area 4-1 and partial fingerprint information in the area 4-2. It can be understood that, since the third connection line 53 and the fourth connection line 54 are independent, the signal processing unit can receive the electrical signals of the third connection line 53 and the fourth connection line 54 at the same time, and also can receive the electrical signals of the third connection line 53 and the fourth connection line 54 in a time-sharing manner.
It should be noted that the embodiments of the present invention provide various operating principles and specific structures of the fingerprint sensor in the display substrate, and the present invention is only exemplary to specifically describe alternative structures of the fingerprint sensor.
In some optional embodiments, please refer to fig. 8, and fig. 8 is a schematic structural diagram of a fingerprint sensor in a display substrate according to an embodiment of the present invention. The fingerprint sensor 40 includes a first electrode 41 and a second electrode 42, the first electrode 41 and the second electrode 42 being cross-insulated; the first electrode 41 is electrically connected to the first signal line 10, and the second electrode 42 is electrically connected to the second signal line 20; the first electrode 41 is used for receiving a fingerprint detection driving signal, and the second electrode 42 is used for emitting a sensing signal; alternatively, the second electrode 42 is used for receiving a fingerprint detection driving signal, and the first electrode 41 is used for emitting a sensing signal. In this embodiment, the first electrode 41 includes two rhombic sub-electrodes, namely a sub-electrode 411 and a sub-electrode 412, which are electrically connected through a first connection portion 413; the second electrode 42 includes two diamond-shaped sub-electrodes, namely a sub-electrode 421 and a sub-electrode 422, which are electrically connected to each other through a second connection portion 423. Alternatively, the first electrode 41 and the second electrode 42 are provided on different conductive layers. Alternatively, the sub-electrode 411, the sub-electrode 412, the sub-electrode 421, the sub-electrode 422, and the second connection portion 423 may be disposed on the same conductive layer, the first connection portion 413 may be disposed on another conductive layer, and the first connection portion 413 and the second connection portion 423 may be insulated from each other by an insulating layer.
In the display substrate provided by this embodiment, the fingerprint sensor includes the first electrode 41 and the second electrode 42, and after the first electrode 41 and the second electrode 42 respectively receive the electrical signal, a mutual capacitance is formed between the two electrodes, and when a finger touches the display substrate, the mutual capacitance in the fingerprint sensor at the corresponding position changes, and since the degree of the concave-convex shape and the concave-convex shape of the fingerprint at different positions on the finger are different, the variation of the mutual capacitance of the fingerprint sensors at different positions is different. The signal processing unit can obtain fingerprint information by analyzing the variation of mutual capacitance of the plurality of fingerprint sensors, so as to perform fingerprint identification.
In the embodiment shown in fig. 8, the fingerprint sensor includes a first electrode and a second electrode, and the first electrode and the second electrode may be made of Indium Gallium Zinc Oxide (IGZO), Indium Zinc Oxide (IZO), Indium Tin Oxide (ITO), Indium Tin Zinc Oxide (ITZO), and the like, which is not limited in this embodiment.
In some alternative embodiments, please refer to fig. 9 and 10, fig. 9 is a circuit diagram of another fingerprint sensor in a display substrate according to an embodiment of the present invention, and fig. 10 is a schematic cross-sectional structure diagram of the fingerprint sensor provided in fig. 9. In the display substrate provided in each embodiment of the present invention, the fingerprint sensor 40 includes a photodiode D and a thin film transistor T; the gate Tg of the thin film transistor T is electrically connected to the first signal line 10, the first pole Ts of the thin film transistor T is electrically connected to the second signal line 20, and the second pole Td of the thin film transistor T is electrically connected to the photodiode D. The photodiode D is used to convert light reflected by the finger into a current signal.
Optionally, the photodiode D is a PIN diode. Wherein the photodiode D comprises a PIN junction D3 between the anode D1 and the cathode D2; the vertical projection of the PIN junction D3 on the array substrate 10 is located in the light-transmitting area of the display substrate. Among them, the PIN junction D3 is composed of a P-type semiconductor, an N-type semiconductor, and an intrinsic semiconductor (I-type layer) between the P-type semiconductor and the N-type semiconductor. Specifically, the cathode D2 is formed of opaque metal, and the boundary of the PIN junction D3 does not exceed the boundary of the cathode D2. PIN junction D3 has photosensitive properties and has unidirectional conductivity. In the absence of illumination, the PIN junction D3 has a small saturation reverse leakage current, i.e., dark current, when the photodiode D is turned off. When the PIN junction D3 is illuminated, the saturation reverse leakage current of the PIN junction D3 is greatly increased, and a photocurrent is formed and changes along with the change of the incident light intensity. In this embodiment, the cathode D2 of the photodiode D is electrically connected to the second diode Td of the tft T.
In the fingerprint recognition stage, the thin film transistor T in the fingerprint sensor 40 is turned on. Taking fingerprint identification by using a fingerprint identification light source as an example, when a finger touches the display substrate, light in the display substrate is irradiated on the finger and reflected on the surface of the finger fingerprint to form reflected light. The reflected light formed by the reflection of the fingerprint of the finger is incident into the fingerprint sensor 40, received by the photodiode D of the fingerprint sensor 40, and converted into a current signal, and the formed current signal is transmitted to the second signal line 20 through the thin film transistor T. Because the concave-convex degree and the concave-convex shape of the fingerprints at different positions on the finger are different, the reflectivity of the light irradiating different positions of the fingerprints is different, the intensity of the reflected light received by the fingerprint sensor 40 is different, the current signals converted by the photosensitive diode D are different in size, and the fingerprint identification can be carried out according to the size of the current signals.
It should be noted that fig. 8, 9 and 10 are only exemplary to provide an example to illustrate the alternative working principle and specific structure of the fingerprint sensor, and should not be construed as limiting the present invention.
In some optional embodiments, please refer to fig. 11, where fig. 11 is a schematic partial structure diagram of another display substrate according to an embodiment of the present invention. The display substrate provided by the embodiment includes a color resist layer 60, and the color resist layer 60 includes color resists of at least three colors. The color resistances of the at least three colors are a first color resistance 61, a second color resistance 62 and a third color resistance 63 respectively. Optionally, the first color resistor 61 is red, the second color resistor 62 is green, and the third color resistor 63 is blue. In this embodiment, the color resist layer 60 is integrated in the display substrate, so that the display substrate can be used for realizing color display. Alternatively, each color resistor is disposed in a first region 21 defined by the first signal line 10 and the second signal line 20 crossing each other. That is, one color resistor and one fingerprint sensor 40 are provided in the first region 21.
The invention also provides a display panel comprising the display substrate provided by any one of the above embodiments of the invention. Referring to fig. 12, fig. 12 is a schematic structural diagram of a display panel according to an embodiment of the present invention. The display panel provided in this embodiment includes the display substrate 300 provided in any embodiment of the present invention. Optionally, the display panel further includes an array substrate 400, and a liquid crystal layer 500 interposed between the array substrate 400 and the display substrate 300. The display panel provided in the embodiment of the present invention has the beneficial effects of the display substrate provided in the embodiment of the present invention, and specific descriptions of the display substrate in the above embodiments may be specifically referred to, and the detailed descriptions of the embodiment are not repeated herein.
The invention also provides a display device comprising the display panel provided by any one of the above embodiments of the invention. Referring to fig. 13, fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention. Fig. 13 provides a display device 1000 including the display panel 1001 according to any of the above embodiments of the present invention. Optionally, the display device 1000 further comprises a housing 1002. The embodiment of fig. 13 is only an example of a mobile phone, and the display device 1000 is described, it is to be understood that the display device provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
As can be seen from the foregoing embodiments, the display substrate, the display panel and the display device provided in the present invention at least achieve the following beneficial effects:
according to the display substrate, the display panel and the display device, the fingerprint sensor is arranged in the display area, and the fingerprint identification module does not need to be additionally arranged in the non-display area, so that the alignment assembly process of the fingerprint identification module can be reduced, the manufacturing efficiency and yield of the display substrate are improved, and the narrow-frame design of the display substrate is facilitated.
In addition, because the manufacturing of fingerprint sensor can be integrated in the manufacturing process of display substrate, need not in display device opening in order to assemble fingerprint identification module, can avoid opening technology to the structural rigidity's that shows to set up harmful effects, can avoid dust, water stain etc. to get into inside the display device simultaneously, can promote the inside electronic component's of display device stability to improve display device's reliability.
In addition, the display substrate, the display panel and the display device provided by the invention comprise at least two nonadjacent first signal line groups, wherein the two nonadjacent first signal line groups are respectively a first signal line group A and a first signal line group B; the first signal lines in the first signal line group A are electrically connected with the a first connecting lines in a one-to-one correspondence mode, and the first signal lines in the first signal line group B are electrically connected with the a first connecting lines in a one-to-one correspondence mode. The first signal line group A and the first signal line group B share a first connecting lines, a first connecting lines do not need to be arranged for the first signal line group A and the first signal line group B respectively, the number of the first signal line connecting lines can be reduced, the area of a non-display area is reduced, and the narrow-frame design of the display substrate is facilitated.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A display substrate, comprising:
a display area and a non-display area surrounding the display area;
the display area includes: the signal line array comprises a plurality of first signal lines extending along a first direction and arranged along a second direction, and a plurality of second signal lines extending along the second direction and arranged along the first direction;
the first signal lines and the second signal lines are crossed and insulated to define a plurality of first areas;
the first area comprises a fingerprint sensor for identifying fingerprint information; the first signal line and the second signal line are electrically connected with the fingerprint sensor;
the non-display area further comprises a plurality of first signal line connecting lines and a plurality of second signal line connecting lines, the first signal lines are electrically connected with the signal processing unit through the first signal line connecting lines, and the second signal lines are electrically connected with the signal processing unit through the second signal line connecting lines;
the display substrate comprises a plurality of first signal line groups, wherein each first signal line group comprises a first signal lines; the plurality of first signal line connecting lines comprise a first connecting lines; the plurality of first signal line connecting lines also comprise a second connecting lines; a first signal lines in the same first signal line group are respectively and correspondingly electrically connected with a first connecting lines or a second connecting lines one by one;
at least two non-adjacent first signal line groups exist, and the plurality of first signal line groups comprise odd first signal line groups and even first signal line groups; the first signal lines in the odd first signal line groups are electrically connected with the a first connecting lines in a one-to-one correspondence manner; the first signal lines in the even first signal line groups are electrically connected with the a second connecting lines in a one-to-one correspondence manner; wherein a is a positive integer greater than 1;
the display substrate comprises a plurality of second signal line groups, wherein each second signal line group comprises b second signal lines; the plurality of second signal line connecting lines comprise b third connecting lines; the plurality of second signal line connecting lines further comprise b fourth connecting lines; b second signal lines in the same second signal line group are respectively and correspondingly electrically connected with b third connecting lines or b fourth connecting lines one by one;
at least two non-adjacent second signal line groups exist, and the plurality of second signal line groups comprise odd second signal line groups and even second signal line groups; the second signal lines in the odd second signal line groups are electrically connected with the b third connecting lines in a one-to-one correspondence manner; the second signal lines in the even second signal line groups are electrically connected with the b fourth connecting lines in a one-to-one correspondence manner; wherein b is a positive integer greater than 1.
2. The display substrate of claim 1,
the width of the first signal line group along the second direction is d1, and d1 is larger than or equal to 2 mm.
3. The display substrate of claim 1,
the width of the second signal line group along the first direction is d2, and d2 is more than or equal to 2 mm.
4. The display substrate of claim 1,
the fingerprint sensor comprises a first electrode and a second electrode, wherein the first electrode and the second electrode are insulated in a crossed mode;
the first electrode is electrically connected with the first signal line, and the second electrode is electrically connected with the second signal line;
the first electrode is used for receiving a fingerprint detection driving signal, and the second electrode is used for transmitting an induction signal; or, the second electrode is used for receiving a fingerprint detection driving signal, and the first electrode is used for transmitting a sensing signal.
5. The display substrate of claim 4,
the first electrode and the second electrode are disposed on the same or different conductive layers.
6. The display substrate of claim 1,
the fingerprint sensor comprises a photosensitive diode and a thin film transistor;
the grid electrode of the thin film transistor is electrically connected with the first signal line, the first pole of the thin film transistor is electrically connected with the second signal line, and the second pole of the thin film transistor is electrically connected with the photosensitive diode.
7. The display substrate of claim 1,
the display substrate comprises a color resistance layer, and the color resistance layer comprises color resistances of at least three colors.
8. The display substrate of claim 1,
the first direction and the second direction are perpendicular.
9. A display panel comprising the display substrate according to any one of claims 1 to 8.
10. The display panel according to claim 9,
the display panel further comprises an array substrate and a liquid crystal layer clamped between the array substrate and the display substrate.
11. A display device characterized by comprising the display panel according to claim 9 or 10.
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| CN108762546A (en) * | 2018-04-26 | 2018-11-06 | 厦门天马微电子有限公司 | Display panel and display device |
| CN111243500B (en) * | 2018-11-29 | 2022-02-11 | 上海和辉光电股份有限公司 | Display panel |
| CN110536082B (en) * | 2019-08-30 | 2021-11-02 | 上海中航光电子有限公司 | Active pixel sensing circuit, active pixel sensing sensor, display panel and device |
| TWI750529B (en) * | 2019-11-08 | 2021-12-21 | 友達光電股份有限公司 | Fingerprint sensing display panel |
| TWI740516B (en) | 2020-05-28 | 2021-09-21 | 元太科技工業股份有限公司 | Display panel |
| CN113744631B (en) * | 2020-05-28 | 2023-08-29 | 元太科技工业股份有限公司 | display panel |
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| CN1657864A (en) * | 2004-02-17 | 2005-08-24 | 精工爱普生株式会社 | Capacitance detection device, fingerprint sensor, and method for searching capacitance detection condition |
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| CN106095214A (en) * | 2016-08-29 | 2016-11-09 | 武汉华星光电技术有限公司 | mutual capacitance type touch screen |
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| US10325131B2 (en) * | 2015-06-30 | 2019-06-18 | Synaptics Incorporated | Active matrix capacitive fingerprint sensor for display integration based on charge sensing by a 2-TFT pixel architecture |
| TWI602129B (en) * | 2015-09-17 | 2017-10-11 | 速博思股份有限公司 | Multi-finger fingerprint recognition apparatus, electronic apparatus with multi-finger fingerprint recognition function and method for the same |
| CN106814916B (en) * | 2017-01-17 | 2019-11-22 | 厦门天马微电子有限公司 | Touch-control display panel, driving method and touch control display apparatus |
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