Fingerprint Detection Module, Display Panel and Electronic Device

Abstract

The present disclosure provides a fingerprint detection module, a display panel, and an electronic device. The fingerprint detection module includes: a plurality of fingerprint pixel circuits and a signal reading module. The plurality of fingerprint pixel circuits are arranged in multiple rows and multiple columns. Each column of fingerprint pixel circuits is longitudinally divided into a plurality of column fingerprint pixel units. The plurality of column fingerprint pixel units are respectively connected to the signal reading module through a data line. The signal reading module is configured to read the fingerprint signals collected by the fingerprint pixel circuits. The plurality of column fingerprint pixel units are respectively connected to the signal reading module through a data line, rather than the entire column of fingerprint pixel circuits being connected to the signal reading module through a data line. This reduces the load and equivalent capacitance of the fingerprint pixel circuits connected to the signal reading module, thereby reducing the noise output by the signal reading module, facilitating the signal reading module to accurately read the fingerprint signals, and also facilitating increasing the size of the fingerprint detection module.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic devices, and in particular, to a fingerprint detection module, a display panel, and an electronic device. Background Art

[0002] With the development of the full-screen technology, the under-screen fingerprint technology has become the main development trend for fingerprint detection. Among them, the under-screen fingerprint technology means that the fingerprint detection module of the electronic device is disposed below the display module. At present, the full-screen fingerprint detection technology of electronic devices is highly favored by people, which requires the area of the fingerprint detection module to be enlarged. However, this will increase the load of each column of fingerprint pixel circuits in the fingerprint detection module, and thus generate relatively large noise, which is not conducive to the fingerprint detection module obtaining accurate fingerprint signals and is not conducive to increasing the size of the fingerprint detection module. Summary of the Invention

[0003] The present disclosure provides an improved fingerprint detection module, a display panel, and an electronic device.

[0004] One aspect of the present disclosure provides a fingerprint detection module, which includes: a plurality of fingerprint pixel circuits and a signal reading module;

[0005] The plurality of fingerprint pixel circuits are arranged in multiple rows and columns. Each column of the fingerprint pixel circuits is longitudinally divided into a plurality of column fingerprint pixel units. The plurality of column fingerprint pixel units are respectively connected to the signal reading module through a data line, and the signal reading module is configured to read the fingerprint signals collected by the fingerprint pixel circuits.

[0006] Optionally, the fingerprint detection module further includes a switch module, and the switch module is connected between the signal reading module and the column fingerprint pixel units.

[0007] Optionally, multiple columns of the fingerprint pixel circuits are longitudinally divided into multiple groups of column fingerprint pixel regions, and each group of column fingerprint pixel regions includes at least two columns of the fingerprint pixel circuits;

[0008] The switch module includes a plurality of switch units, and each switch unit is connected between a group of column fingerprint pixel regions and the signal reading module.

[0009] Optionally, at least two of the switch units are connected to the signal reading module through the same first common trace.

[0010] Optionally, the fingerprint detection module further includes: a signal driving module, connected to each row of the fingerprint pixel circuits, and configured to send driving signals to each row of the fingerprint pixel circuits;

[0011] The multiple fingerprint pixel circuits are horizontally divided into multiple groups of row fingerprint pixel regions. Each group of row fingerprint pixel regions includes a plurality of column fingerprint pixel units, and the plurality of column fingerprint pixel units are located in different columns respectively.

[0012] Optionally, at least two groups of the row fingerprint pixel regions are connected to the signal driving module through the same second common trace.

[0013] Optionally, the fingerprint pixel circuit includes a fingerprint sensing unit and traces connected in the fingerprint pixel circuit. The fingerprint sensing unit and the traces are disposed on different layers.

[0014] Optionally, the number and length of the traces corresponding to different column fingerprint pixel units are equal.

[0015] Optionally, the fingerprint pixel circuit includes a passive fingerprint pixel circuit.

[0016] Another aspect of the present disclosure provides a display panel, and the display panel includes any one of the fingerprint detection modules mentioned above.

[0017] Optionally, the display panel further includes a display module, and the display module includes a display surface;

[0018] The fingerprint detection module is disposed on a side of the display module facing away from the display surface, and a positive projection of the fingerprint detection module on the display surface covers the entire display surface.

[0019] Another aspect of the present disclosure provides an electronic device, and the electronic device includes any one of the display panels mentioned above.

[0020] The technical solution provided by the present disclosure has at least the following beneficial effects:

[0021] Based on dividing each column fingerprint pixel circuit into a plurality of column fingerprint pixel units, and the plurality of column fingerprint pixel units are respectively connected to the signal reading module through a data line, rather than the entire column fingerprint pixel circuit being connected to the signal reading module through a data line. When the signal reading module reads the fingerprint signal, this reduces the load and equivalent capacitance of the fingerprint pixel circuit connected to the signal reading module relative to the entire column fingerprint pixel circuit, thereby reducing the noise output by the signal reading module, facilitating the signal reading module to accurately read the fingerprint signal, and also facilitating increasing the size of the fingerprint detection module to achieve full-screen fingerprint detection. Description of the Drawings

[0022] Figure 1 The figure shows an equivalent circuit diagram of a column fingerprint pixel circuit connected to a signal reading module;

[0023] Figure 2The following is a partial cross-sectional view of a display panel shown according to an exemplary embodiment of the present disclosure;

[0024] Figure 3 The following is a partial structural schematic diagram of a fingerprint detection module shown according to an exemplary embodiment of the present disclosure;

[0025] Figure 4 The following is a partial structural schematic diagram of a fingerprint detection module shown according to an exemplary embodiment of the present disclosure;

[0026] Figure 5 The following shows Figure 4 a circuit schematic diagram of the fingerprint pixel units in the middle column;

[0027] Figure 6 The following is a partial structural schematic diagram of a fingerprint detection module shown according to an exemplary embodiment of the present disclosure;

[0028] Figure 7 The following shows Figure 6 a schematic diagram of the connection between two sets of column fingerprint pixel regions and switch units in [reference];

[0029] Figure 8 The following is a partial structural schematic diagram of a fingerprint detection module shown according to an exemplary embodiment of the present disclosure;

[0030] Figure 9 The following is a partial cross-sectional view of a fingerprint detection module shown according to an exemplary embodiment of the present disclosure;

[0031] Figure 10 The following is a partial structural schematic diagram of a fingerprint detection module shown according to an exemplary embodiment of the present disclosure;

[0032] Figure 11 The following is a partial structural schematic diagram of a fingerprint detection module shown according to an exemplary embodiment of the present disclosure. Detailed Description of the Specific Embodiment

[0033] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. Unless otherwise defined, the technical terms or scientific terms used in this disclosure should have the ordinary meanings as understood by those of ordinary skill in the art to which this disclosure pertains. The terms "first", "second" and similar words used in the specification and claims of this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not denote a limitation of quantity, but mean that there is at least one. Unless otherwise indicated, words such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0035] The singular forms "a", "the" and "said" used in the specification and appended claims of this disclosure are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0036] In some embodiments, the fingerprint detection module is an optical fingerprint detection module, and the fingerprint detection module includes a plurality of fingerprint pixel circuits, a signal driving module, and a signal reading module. The plurality of fingerprint pixel circuits are arranged in multiple rows and multiple columns, that is, a fingerprint pixel circuit array is formed. The signal driving module is configured to sequentially drive the select switches in each row of fingerprint pixel circuits to conduct, and the signal reading module is configured to read the fingerprint signals collected by the fingerprint pixel circuits that are driven to conduct by the signal driving module in each column of fingerprint pixel circuits.

[0037] With the development of full-screen fingerprint detection technology, the size of the fingerprint detection module is getting larger. In other words, the area of the fingerprint pixel circuit array is getting larger, which makes each column of fingerprint pixel circuits have a larger number of fingerprint pixel circuits, and the load and equivalent capacitance C1 of each column of fingerprint pixel circuits are larger, making it easier to generate noise. The following combines Figure 1 and formulas for explanation:

[0038] Figure 1 The figure shows an equivalent circuit diagram of a column of fingerprint pixel circuits connected to the signal reading module. Among them, C1 represents the equivalent capacitance of a column of fingerprint pixel circuits; C2 represents the feedback capacitance of the operational amplifier A in the signal reading module; V n,eq represents the equivalent noise of the operational amplifier A; V OUT represents the signal output terminal of the signal reading module. According to the following formula, the larger C1 is, the larger V OUT,noiseThe greater the (noise output by the signal reading module), the less conducive it is for the signal reading module to read accurate fingerprint signals, and it is not conducive to manufacturing a larger-sized fingerprint detection module, nor to realizing the full-screen fingerprint detection technology.

[0039]

[0040] Based on the above defects, the embodiments of the present disclosure provide a fingerprint detection module, a display panel, and an electronic device, which are elaborated in detail below with reference to the accompanying drawings:

[0041] In the embodiments of the present disclosure, the electronic device includes but is not limited to: mobile phones, tablet computers, iPads, digital broadcast terminals, messaging devices, game consoles, medical devices, fitness devices, personal digital assistants, smart wearable devices, smart TVs, floor-sweeping robots, smart speakers, etc.

[0042] In some embodiments, the electronic device includes a display panel. The number of display panels is at least one, and the display panel may further include a folding screen.

[0043] Figure 2 Shown is a partial cross-sectional view of a display panel according to an exemplary embodiment of the present disclosure. Refer to Figure 2 , the display panel includes a fingerprint detection module 100. Exemplarily, the fingerprint detection module 100 includes an optical fingerprint detection module.

[0044] In some embodiments, continuing to refer to Figure 2 , the display panel further includes a display module 200, and the display module 200 includes a display surface; the fingerprint detection module 100 is disposed on a side of the display module 200 facing away from the display surface, and the orthographic projection of the fingerprint detection module 100 on the display surface covers the entire display surface. In other words, the entire display panel can be used as a fingerprint detection area to implement the full-screen fingerprint detection technology. In other embodiments, the orthographic projection of the fingerprint detection module 100 on the display surface covers a part of the display surface, so that a part of the display panel serves as a fingerprint detection area.

[0045] Exemplarily, the display module 200 includes an OLED (Organic Light-Emitting Diode) display layer.

[0046] In some embodiments, continuing to refer to Figure 2 , the display panel further includes a covering layer 300 disposed facing the display surface to protect the display module 200. When the finger 400 presses on the covering layer 300, the display module 200 can emit light to the finger 400, and the light is reflected by the ridges and valleys of the fingerprint of the finger 400 and then received by the fingerprint detection module 100, and the fingerprint is detected based on the light received by the fingerprint detection module 100.

[0047] Figure 3 The following shows a partial structural schematic diagram of a fingerprint detection module 100 according to an exemplary embodiment of the present disclosure. Figure 4 The following shows a partial structural schematic diagram of a fingerprint detection module 100 according to an exemplary embodiment of the present disclosure. Figure 5 The following shows Figure 4 a circuit schematic diagram of the column fingerprint pixel units in Figures 3 to 5 Combined with reference to Figures 3 to 5 , the fingerprint detection module 100 provided by some embodiments of the present disclosure includes: a plurality of fingerprint pixel circuits 110 and a signal reading module 120.

[0048] The plurality of fingerprint pixel circuits 110 are arranged in multiple rows and multiple columns, that is, a fingerprint pixel circuit array is formed. Each column of fingerprint pixel circuits 110 is longitudinally divided into a plurality of column fingerprint pixel units 111, and the plurality of column fingerprint pixel units 111 are respectively connected to the signal reading module 120 through a data line (gateline) 131, and the signal reading module 120 is configured to read the fingerprint signals collected by the fingerprint pixel circuits 110.

[0049] It should be noted that the "longitudinal direction" involved in the present disclosure refers to: the direction parallel to each column of fingerprint pixel circuits 110. Each column fingerprint pixel unit 111 may include a plurality of fingerprint pixel circuits 110.

[0050] To more clearly understand the relationship between each column of fingerprint pixel circuits 110, column fingerprint pixel units 111, and the signal reading module 120, exemplarily, referring to Figure 4 , each column of fingerprint pixel circuits 110 includes three column fingerprint pixel units 111 arranged in sequence longitudinally. Taking the first column of fingerprint pixel circuits 110 as an example, it includes column fingerprint pixel units 111-1, 111-2, and 111-3 arranged in sequence longitudinally. Exemplarily, referring to Figure 5 , each column fingerprint pixel unit 111 includes a plurality of fingerprint pixel circuits 110, for example, including x fingerprint pixel circuits 110, which are the first fingerprint pixel circuit, the second fingerprint pixel circuit,..., the xth fingerprint pixel circuit in sequence longitudinally.

[0051] In some embodiments, the fingerprint pixel circuit includes a passive fingerprint pixel circuit. The passive fingerprint pixel circuit is usually disposed on a glass substrate, which is beneficial to reducing costs. Taking the first fingerprint pixel circuit as an example, the first fingerprint pixel circuit includes: a connected strobe switch Gate-1 and a photosensitive diode PD1. When the strobe switch Gate-1 is turned on, the fingerprint signal converted by the photosensitive diode PD1 is output to the signal reading module 120 through the data line 131.

[0052] Based on the above, the fingerprint detection module 100 provided by the embodiments of the present disclosure divides each column of fingerprint pixel circuits 110 into multiple column fingerprint pixel units 111, and the multiple column fingerprint pixel units 111 are respectively connected to the signal reading module 120 through a data line 131, rather than the entire column of fingerprint pixel circuits 110 being connected to the signal reading module 120 through a data line. When the signal reading module 120 reads the fingerprint signal, this reduces the load and equivalent capacitance of the fingerprint pixel circuits 110 connected to the signal reading module 120 relative to the entire column of fingerprint pixel circuits, thereby reducing the noise output by the signal reading module 120, facilitating the signal reading module 120 to accurately read the fingerprint signal, and also facilitating increasing the size of the fingerprint detection module 100 to implement the full-screen fingerprint detection technology.

[0053] In some embodiments, continuing to refer to Figure 4 , the fingerprint detection module 100 further includes a switch module 140, and the switch module 140 is connected between the signal reading module 120 and the column fingerprint pixel unit 111. In this way, by controlling the switch module 140 to conduct or disconnect the column fingerprint pixel unit 111 and the signal reading module 120, it is possible to control whether the signal reading module 120 reads the fingerprint signal collected by the fingerprint pixel circuit 110 in the column fingerprint pixel unit 111.

[0054] Figure 6 The following shows a partial structural schematic diagram of the fingerprint detection module 100 according to an exemplary embodiment of the present disclosure. Figure 7 The following shows Figure 6 a schematic diagram of the connection between two groups of column fingerprint pixel regions 112 and switch units 141 in Figure 6 and Figure 7 . In some embodiments, with reference to

[0055] Continuing to refer to Figure 6, the number of column fingerprint pixel regions 112 is M, and they are sequentially the column fingerprint pixel region L-1, column fingerprint pixel region L-2, column fingerprint pixel region L-3, column fingerprint pixel region L-4, ……, column fingerprint pixel region L-M from left to right. Exemplarily, each group of column fingerprint pixel regions 112 includes two column fingerprint pixel circuits 110. For example, with reference to Figure 4 and Figure 7 , the column fingerprint pixel region L-1 includes column fingerprint pixel units 111-1 and 111-4, and other column fingerprint pixel units 111 that are in the same column as these two columns. The column fingerprint pixel region L-2 includes column fingerprint pixel units 111-5 and 111-6, and other column fingerprint pixel units 111 that are in the same column as these two columns.

[0056] Exemplarily, with reference to Figure 7 , each switch unit 141 includes a plurality of switches 142, and each switch 142 is connected to a column fingerprint pixel unit 111. Exemplarily, with reference to Figure 7 , each group of column fingerprint pixel regions 112 includes two column fingerprint pixel circuits 110, each column fingerprint pixel circuit 110 includes three column fingerprint pixel units 111, each switch unit 141 includes six switches 142, and each switch 142 is connected to a column fingerprint pixel unit 111. Taking the column fingerprint pixel region L-1 as an example, the column fingerprint pixel region L-1 includes two column fingerprint pixel circuits, and the fingerprint pixel circuit 110 on the left side of them includes column fingerprint pixel units 111-1, 111-2, and 111-3.

[0057] Based on the above, since multiple column fingerprint pixel units 111 are respectively connected to the signal reading module 120 through a data line 131, this requires the signal reading module 120 to set multiple interfaces and multiple traces, which is not conducive to reducing costs and improving the integration of the fingerprint detection module 100. In some embodiments, with reference to Figure 6 and Figure 7 , at least two switch units 141 are connected to the signal reading module 120 through the same first common trace 150. In this way, it is beneficial to reduce the number of interfaces of the signal reading module 120 and the number of traces laid, so as to reduce costs and improve the integration of the fingerprint detection module 100.

[0058] Exemplarily, with reference to Figure 6 and Figure 7, the first common trace 150 includes a plurality of first horizontal traces 151 and a plurality of first vertical traces 152. Each group of column fingerprint pixel regions 112 is connected to a switching unit 141. Each group of column fingerprint pixel regions 112 includes at least two columns of fingerprint pixel circuits 110. All the column fingerprint pixel units 111 in each group of column fingerprint pixel regions 112 are connected to the plurality of first horizontal traces 151 through a switching unit 141. Each first horizontal trace 151 is connected to the signal reading module 120 through a first vertical trace 152. At least two switching units 141 are connected to the same first horizontal trace 151. In this way, it is beneficial to reduce the number of the first horizontal traces 151 to improve the integration of the fingerprint detection module 100.

[0059] Exemplarily, continuing to refer to Figure 6 and Figure 7 , both the number of the first horizontal traces 151 and the number of the first vertical traces 152 are six. Each group of column fingerprint pixel regions 112 includes two columns of fingerprint pixel circuits 110. Each column of fingerprint pixel circuits 110 includes three column fingerprint pixel units 111. In each group of column fingerprint pixel regions 112, the six column fingerprint pixel units 111 are respectively connected to the six first horizontal traces 151 through a switching unit 141, and the six first horizontal traces 151 are respectively connected to the six first vertical traces 152. For example, both the column fingerprint pixel region L-1 and the column fingerprint pixel region L-2 are connected to the same six first horizontal traces 151. In this way, multiple groups of column fingerprint pixel regions 112 share the six first horizontal traces 151 and the six first vertical traces 152, which is beneficial to reducing the number of traces and improving the integration of the fingerprint detection module 100.

[0060] Figure 8 The figure shows a partial structural schematic diagram of the fingerprint detection module 100 according to an exemplary embodiment of the present disclosure. In some embodiments, referring to Figure 3 and Figure 8 , the fingerprint detection module 100 further includes: a signal driving module 160, connected to each row of fingerprint pixel circuits 110, for sending a driving signal to each row of fingerprint pixel circuits 110 to drive the strobe switch Gate in each row of fingerprint pixel circuits 110 to conduct. Multiple rows of fingerprint pixel circuits 110 are divided into multiple groups of row fingerprint pixel regions 113 along the horizontal direction. Each group of row fingerprint pixel regions 113 includes a plurality of column fingerprint pixel units 111, and the plurality of column fingerprint pixel units 111 are respectively located in different columns. In other words, each row fingerprint pixel region 113 includes a plurality of column fingerprint pixel units 111 arranged horizontally, and in each row fingerprint pixel region 113, there is only one column fingerprint pixel unit 111 in each column. It should be noted that: "horizontal" refers to the direction parallel to each row of fingerprint pixel circuits 110.

[0061] Exemplarily, continuing to refer to Figure 8, the number of row fingerprint pixel regions 113 is N, which are sequentially row fingerprint pixel region ROWGRP-1, row fingerprint pixel region ROWGRP-2, ……, row fingerprint pixel region ROWGRP-N from top to bottom. Taking row fingerprint pixel region ROWGRP-1 as an example, it includes multiple columns of fingerprint pixel units 111. In this way, by driving any group of row fingerprint pixel regions 113 through signal driving module 160 and selecting any group of column fingerprint pixel regions 112 through switch module 140, signal reading module 120 can read the fingerprint signals of fingerprint pixel circuits 110 in the intersection region of this row fingerprint pixel region 113 and column fingerprint pixel region 112, thereby realizing fingerprint detection by partition, which is beneficial to reducing power consumption and improving the utilization rate of signal reading module 120.

[0062] Exemplarily, the number of column fingerprint pixel regions 112 is M and the number of row fingerprint pixel regions 113 is N. Then, through the cooperation of signal driving module 160 and switch module 140 to control any one of the M×N regions to output fingerprint signals, fingerprint detection by partition is realized.

[0063] In some embodiments, at least two groups of row fingerprint pixel regions 113 are connected to signal driving module 160 through the same second common trace 170. In this way, it is beneficial to reduce the number of laid traces and the number of interfaces of signal driving module 160, so as to reduce the cost of fingerprint detection module 100 and improve the integration degree of fingerprint detection module 100.

[0064] Exemplarily, the second common trace 170 includes multiple second longitudinal traces 171, and the fingerprint pixel circuits 110 in at least two groups of row fingerprint pixel regions 113 are connected to the same second longitudinal trace 171.

[0065] Exemplarily, continue to refer to Figure 8 , each group of row fingerprint pixel regions 113 includes x rows of fingerprint pixel circuits 110, the number of second longitudinal traces 171 is x, and each row of fingerprint pixel circuits 110 in each group of row fingerprint pixel regions 113 is respectively connected to one second longitudinal trace 171. In this way, multiple groups of row fingerprint pixel regions 113 share x second longitudinal traces 171.

[0066] Figure 9 The figure shows a partial cross-sectional view of fingerprint detection module 100 shown by the present disclosure according to an exemplary embodiment. Figure 10 The figure shows a partial structural schematic diagram of fingerprint detection module 100 shown by the present disclosure according to an exemplary embodiment. In some embodiments, with combined reference to Figure 3 , Figure 9 and Figure 10, the fingerprint pixel circuit 110 includes: a fingerprint sensing unit 114 and a trace 130 connected in the fingerprint pixel circuit 110. The fingerprint sensing unit 114 and the trace 130 are disposed on different layers. The trace 130 includes a data line 131. The data line 131 is arranged longitudinally and is connected to the signal reading module 120. It should be noted that, reference Figure 3 , the trace 130 connected in the fingerprint pixel circuit 110 further includes: a scan line 132 arranged horizontally. The scan line 132 is connected to the signal driving module 160. In this way, separating the trace 130 and the fingerprint sensing unit 114 on different layers not only reduces the interference of the trace 130 on the fingerprint signal, but also makes the trace 130 give way to the fingerprint sensing unit 114, avoiding dead zones in the fingerprint detection module 100 due to the large number of traces 130, facilitating making the size of the fingerprint sensing unit 114 larger on the premise of ensuring the resolution, and then increasing the intensity of the fingerprint signal collected by the fingerprint pixel circuit 110, which is beneficial to accurately detecting fingerprints. Exemplarily, the fingerprint sensing unit 114 includes a photosensitive diode.

[0067] Reference Figure 10 , each column fingerprint pixel unit 111 is connected to the switch module 140 through a data line 131. Then, in the same column of fingerprint pixel circuits 110, the lengths of the data lines 131 corresponding to multiple column fingerprint pixel units 111 are not equal, and the number of data lines 131 corresponding to each column fingerprint pixel unit 111 is not equal. In this way, the environment where each column fingerprint pixel unit 111 is located is inconsistent, and the equivalent capacitance and noise generated are different, and then the errors of the driving signals received or the fingerprint signals output by each fingerprint pixel circuit 110 are different, which is not conducive to later correction and thus not conducive to accurately detecting fingerprints.

[0068] Figure 11 The following shows a partial structural schematic diagram of the fingerprint detection module 100 according to an exemplary embodiment of the present disclosure. In some embodiments, reference Figure 11 , the number and length of the traces 130 corresponding to different column fingerprint pixel units 111 are equal. In this way, the environment where each column fingerprint pixel unit 111 is located is consistent, which is beneficial to making the errors of the fingerprint signals collected by each fingerprint pixel circuit 110 equal, facilitating later correction, and thus being conducive to accurately detecting fingerprints.

[0069] Exemplarily, continue to refer to Figure 11 , taking the left column fingerprint pixel circuit 110 as an example, it is sequentially divided into a column fingerprint pixel unit 111-1, a column fingerprint pixel unit 111-2, and a column fingerprint pixel unit 111-3 from top to bottom. In Figure 11Among them, the data line 131 with a circle is the data line 131 connected to the column fingerprint pixel unit 111, and the other data lines 131 are extended data lines. Specifically, the column fingerprint pixel units 111-1, 111-2, and 111-3 are respectively connected to the switch module 140 through the first data line 131-1, the second data line 131-2, and the third data line 131-3. The third data line 131-3 extends to the column fingerprint pixel units 111-1 and 111-2, and the second data line 131-2 extends to the column fingerprint pixel unit 111-1. In this way, the column fingerprint pixel units 111-1, 111-2, and 111-3 simultaneously correspond to the first data line 131-1, the second data line 131-2, and the third data line 131-3, and the lengths of the corresponding first data line 131-1, second data line 131-2, and third data line 131-3 are equal to ensure that the environment where each column fingerprint pixel unit 111 is located is consistent.

[0070] In the embodiment of the present disclosure, with continued reference to Figure 3 , the fingerprint detection module 100 further includes an analog-to-digital conversion module 180, which is connected to the signal reading module 120 and is used to convert the fingerprint signal into a digital signal and transmit it to the control module of the electronic device, such as the CPU, to facilitate the electronic device to detect fingerprints.

[0071] For the method embodiment, since it basically corresponds to the device embodiment, the relevant parts can refer to the partial description of the device embodiment. The method embodiment and the device embodiment complement each other.

[0072] In the above embodiments of the present disclosure, without conflict, they can complement each other.

[0073] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A fingerprint detection module, characterized in that, The fingerprint detection module includes: a plurality of fingerprint pixel circuits and a signal reading module; The plurality of fingerprint pixel circuits are arranged in multiple rows and columns. Each column of fingerprint pixel circuits is longitudinally divided into a plurality of column fingerprint pixel units. Each column fingerprint pixel unit includes a plurality of fingerprint pixel circuits sequentially arranged longitudinally. The plurality of column fingerprint pixel units are respectively connected to the signal reading module through a data line. The signal reading module is configured to read the fingerprint signals collected by the fingerprint pixel circuits; When the signal reading module reads the fingerprint signals, the load and equivalent capacitance of the fingerprint pixel circuits connected to the signal reading module are reduced relative to the entire column of fingerprint pixel circuits, reducing the noise output by the signal reading module.

2. The fingerprint detection module according to claim 1, wherein The fingerprint detection module further includes a switch module, and the switch module is connected between the signal reading module and the column fingerprint pixel units.

3. The fingerprint detection module according to claim 2, wherein, Multiple columns of the fingerprint pixel circuits are longitudinally divided into multiple groups of column fingerprint pixel regions, and each group of column fingerprint pixel regions includes at least two columns of the fingerprint pixel circuits; The switch module includes a plurality of switch units, and each switch unit is connected between a group of column fingerprint pixel regions and the signal reading module.

4. The fingerprint detection module according to claim 3, wherein At least two of the switch units are connected to the signal reading module through the same first common trace.

5. The fingerprint detection module according to claim 1, characterized in that, The fingerprint detection module further includes: a signal driving module, connected to each row of the fingerprint pixel circuits, for sending driving signals to each row of the fingerprint pixel circuits; Multiple rows of the fingerprint pixel circuits are horizontally divided into multiple groups of row fingerprint pixel regions, and each group of row fingerprint pixel regions includes a plurality of the column fingerprint pixel units, and the plurality of column fingerprint pixel units are respectively located in different columns.

6. The fingerprint detection module according to claim 5, wherein At least two groups of the row fingerprint pixel regions are connected to the signal driving module through the same second common trace.

7. The fingerprint detection module according to claim 1, wherein The fingerprint pixel circuit includes: a fingerprint sensing unit and a trace connected in the fingerprint pixel circuit. The fingerprint sensing unit and the trace are disposed on different layers, and the trace includes the data line.

8. The fingerprint detection module according to claim 7, wherein The number and length of the traces corresponding to different column fingerprint pixel units are equal.

9. The fingerprint detection module according to any one of claims 1 to 8, wherein The fingerprint pixel circuit includes a passive fingerprint pixel circuit.

10. A display panel, characterized in that, The display panel includes the fingerprint detection module according to any one of claims 1 to 9.

11. The display panel according to claim 10, wherein, The display panel further includes a display module, and the display module includes a display surface; The fingerprint detection module is disposed on a side of the display module facing away from the display surface, and the orthographic projection of the fingerprint detection module on the display surface covers the entire display surface.

12. An electronic device, characterized in that, The electronic device includes the display panel according to claim 10 or 11.

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