WO2019033355A1 - Biosensing module and drive circuit thereof, and electronic device - Google Patents

Abstract

Provided are a biosensing module and a drive circuit thereof, and an electronic device. The biosensing module comprises a display panel (100) and a photosensitive panel (200) stacked with the display panel (100), wherein the display panel (100) comprises a plurality of display pixels (12); the photosensitive panel (200) comprises a plurality of photosensitive devices (220); each photosensitive device (220) is arranged directly facing a display pixel (12); and when driving some of the display pixels (12) to be turned on simultaneously, the drive circuit drives the photosensitive devices (220) directly facing the extinguished display pixels (12) to carry out light sensing.

Description

Biosensing module and its driving circuit and electronic device Technical field

The utility model relates to a biological sensing module, a biometric information sensing method and an electronic device.

Background technique

At present, biometric information sensors, especially fingerprint recognition sensors, have gradually become the standard components of electronic products such as mobile terminals. Since the optical fingerprint recognition sensor has stronger penetration ability than the capacitive fingerprint recognition sensor, an optical fingerprint recognition module applied to the mobile terminal has been proposed. As shown in FIG. 1, the optical fingerprint recognition module includes an optical fingerprint sensor 400 and a light source 402. The optical fingerprint sensor 400 is disposed under the protective cover 401 of the mobile terminal. The light source 402 is disposed adjacent to one side of the optical fingerprint sensor 400. When the user's finger F contacts the protective cover 401, the light signal emitted by the light source 402 passes through the protective cover 401 and reaches the finger F, is reflected by the valleys and ridges of the finger F, and is received by the optical fingerprint sensor 400, and The fingerprint biometric information of the finger F is formed.

However, the above optical fingerprint recognition module can only be limited to a predetermined area of the mobile terminal, such as a non-display area of the mobile terminal, and must contact the predetermined area to perform fingerprint recognition, and the use is still limited.

Utility model content

The embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art. To this end, the embodiments of the present invention need to provide a biosensing module, a biometric information sensing method thereof, and an electronic device.

The embodiment of the present invention provides a driving circuit of a bio-sensing module, the bio-sensing module includes a display panel and a photosensitive panel stacked on the display panel; the display panel includes a plurality of display pixels; The photosensitive panel includes a plurality of photosensitive devices; each photosensitive device is disposed opposite to a display pixel; and the driving circuit performs light sensing when the display portion of the driving portion is illuminated while the driving portion is being illuminated.

The embodiment of the present invention improves the sensing accuracy of the bio-sensing module by cooperatively driving the photosensitive device of the photosensitive panel and the display pixels of the display panel.

In some embodiments, the photosensitive device is configured to receive an optical signal and convert the received optical signal into an electrical signal; the driving circuit further includes a signal processing unit that receives the electrical output from the photosensitive device And obtaining, according to the electrical signal, predetermined biometric information of the target object contacting or approaching the bio-sensing module.

In some embodiments, the display pixels are distributed in an array, and the display pixels are divided into a first display pixel group and a second display pixel group correspondingly in an odd row and an even row, when the driving circuit drives the photosensitive panel to perform light. During sensing, the driving circuit drives the display pixels of the same display pixel group to illuminate at the same time, and the display pixels driving the different display pixel groups are not illuminated at the same time.

In some embodiments, after the driving circuit drives the lighting time of the display pixels of one of the first display pixel group and the second display pixel group for a preset time, then driving another display pixel. The display pixels of the group are lit at the same time.

In some embodiments, the plurality of photosensitive devices are arranged in an array, and the photosensitive device is divided into a first photosensitive device group and a second photosensitive device group correspondingly in odd-numbered rows and even-numbered rows, wherein the first photosensitive member Each row of the photosensitive device of the device group and the display pixels of each row of the first display pixel group are respectively disposed opposite to each other, and each row of the photosensitive device of the second photosensitive device group and the display pixel of each row of the second display pixel group are respectively disposed opposite to each other. The driving circuit is further configured to: when the display pixels of the first display pixel group are simultaneously illuminated, driving the photosensitive device in the second photosensitive device group row by row to perform light sensing; and simultaneously displaying the display pixels of the second display pixel group When lit, the photosensitive device in the first photosensitive device group is driven row by row to perform light sensing.

The first display pixel group is driven to be simultaneously illuminated by dividing the display pixel into the first display pixel group and the second display pixel group, and the photosensitive device corresponding to the second display pixel group is driven to perform light sensing. And then driving the second display pixel group to simultaneously illuminate, and driving the photosensitive device corresponding to the first display pixel group to perform light sensing. This makes the driving circuit of the display pixel simpler and accelerates the sensing efficiency of the biometric information. In addition, when a group of display pixels are simultaneously illuminated, a plurality of photosensitive devices of the photosensitive device group are scanned line by line to perform light sensing at a time while driving one row of photosensitive devices, thereby accelerating the driving efficiency of the driving circuit.

In some embodiments, the bio-sensing module further includes a touch sensor, the driving circuit is further configured to drive the touch sensor to perform touch sensing, when detecting that the target object touches or approaches the bio-sensing mode In the group, the touch area of the target object on the bio-sensing module is determined to drive the display pixel of the corresponding touch area to emit light and the photosensitive device performs light sensing. Therefore, when the photosensitive panel is driven to perform light sensing, the entire photosensitive panel is not required to be scanned, thereby speeding up the biometric information sensing speed of the biosensor module, and the photosensitive panel can be driven to perform multiple scans in a limited time. Furthermore, the biometric information sensing accuracy of the biosensing module is also improved.

In some embodiments, the driver circuit is integrated in one or several chips; or, some of the circuits in the driver circuit are integrated in one chip or several chips.

An embodiment of the present invention provides a biosensing module including a display panel and a photosensitive panel laminated with the display panel; the display panel includes a plurality of display pixels; the photosensitive panel includes a plurality of photosensitive devices; The photosensitive device is disposed opposite to a display pixel: the bio-sensing module further includes a driving circuit of any one of the above embodiments, The driving circuit is configured to drive display pixels to illuminate and drive the photosensitive device to perform light sensing.

In the bio-sensing module of the embodiment of the present invention, the photosensitive panel realizes the biometric information sensing of the target object by using the optical signal emitted by the display panel, and does not need to additionally set the light source, thereby saving the cost of the bio-sensing module. Moreover, biometric information sensing is performed on a target object that contacts or touches the display panel at any position. In addition, the cooperative control between the display driving unit and the photosensitive driving unit by the processor improves the sensing accuracy of the biometric information.

In some embodiments, the display pixels are distributed in an array, and the display pixels are divided into a first display pixel group and a second display pixel group in odd-numbered rows and even-numbered rows, when the photosensitive panel performs light sensing. The driving circuit drives the display pixels of the same display pixel group to be lit at the same time, and the display pixels driving the different display pixel groups are not illuminated at the same time.

In some embodiments, after the driving circuit drives the lighting time of the display pixels of one of the first display pixel group and the second display pixel group for a predetermined time, then driving another display pixel group The display pixels are lit at the same time.

In some embodiments, the plurality of photosensitive devices are arranged in an array, and the photosensitive device is divided into a first photosensitive device group and a second photosensitive device group correspondingly in odd-numbered rows and even-numbered rows, wherein the first photosensitive device group Each row of photosensitive devices is disposed opposite to each row of display pixels of the first display pixel group, and each row of photosensitive devices of the second photosensitive device group and each row of display pixels of the second display pixel group are disposed opposite each other; When the display pixels of the first display pixel group are simultaneously illuminated, the driving circuit drives the photosensitive device in the second photosensitive device group to perform light sensing row by row; when the display pixels of the second display pixel group are simultaneously illuminated, the driving circuit Photosensitive sensing is performed by driving the photosensitive devices in the first photosensitive device group row by row.

The first display pixel group is driven to be simultaneously illuminated by dividing the display pixel into the first display pixel group and the second display pixel group, and the photosensitive device corresponding to the second display pixel group is driven to perform light sensing. And then driving the second display pixel group to simultaneously illuminate, and driving the photosensitive device corresponding to the first display pixel group to perform light sensing. This makes the driving of the display pixels simpler and speeds up the sensing efficiency of the biometric information. In addition, when a group of display pixels are simultaneously illuminated, a plurality of photosensitive devices of the photosensitive device group are scanned line by line to perform light sensing at the same time by driving one row of photosensitive devices at a time, thereby accelerating the sensing efficiency of the biometric information.

In some embodiments, the photosensitive panel is located above the display panel, or the photosensitive panel is located below the display panel.

In some embodiments, the display panel has a display area; the photosensitive panel is configured to perform biometric information sensing on a target object at any position within a display area of the display panel; or the photosensitive panel has sensing a region, and a shape of the sensing region is consistent with a shape of the display region, and a size of the sensing region is less than or equal to a size of the display region.

In some embodiments, the display panel has a bio-sensing area, and the photosensitive panel corresponds to a biological sense Below the measurement area.

In some embodiments, the biosensing module further includes a touch sensor coupled to the drive circuit. When it is detected that the target object touches or approaches the bio-sensing module, the touch area of the target object on the bio-sensing module 1 is determined to drive the display pixels of the corresponding touch area to light up and the photosensitive device performs light sensing. Therefore, when the photosensitive panel is driven to perform light sensing, the entire photosensitive panel is not required to be scanned, thereby speeding up the biometric information sensing speed of the biosensor module, and the photosensitive panel can be driven to perform multiple scans in a limited time. Furthermore, the biometric information sensing accuracy of the biosensing module is also improved.

An embodiment of the present invention provides an electronic device including the bio-sensing module of any of the above embodiments. As such, the electronic device has all of the benefits of the biosensing module described above.

The additional aspects and advantages of the embodiments of the invention will be set forth in part in the description in the written description

DRAWINGS

The above and/or additional aspects and advantages of the embodiments of the invention will be apparent from the

1 is a schematic diagram of an optical biometric information sensing structure applied to an electronic device in the prior art;

2 is a partial structural schematic view of a biosensing module according to an embodiment of the present invention;

3 is a block diagram showing the structure of a driving circuit according to an embodiment of the present invention;

4 is a structural block diagram of a photosensitive panel according to an embodiment of the present invention;

5 is a schematic view showing driving of a display pixel in a photosensitive device and a display panel in a photosensitive panel according to an embodiment of the present invention;

6 is a schematic diagram of a driving process of the photosensitive device of the photosensitive panel and the display pixels of the display panel when the bio-sensing module of the present invention performs biometric information sensing;

7 is a schematic diagram of another driving process of the photosensitive device of the photosensitive panel and the display pixel of the display panel when the bio-sensing performs biometric information sensing according to the present invention;

8 is a schematic diagram of a front structure of a bio-sensing module applied to an electronic device according to an embodiment of the present invention;

9 is a cross-sectional structural view of the electronic device of FIG. 8 taken along line I-I, in which only a partial structure of the electronic device is shown;

10 is a schematic diagram showing a correspondence relationship between a display area of a display panel and a sensing area of the photosensitive panel according to an embodiment of the present invention;

11 is a schematic diagram of a front structure of a bio-sensing module applied to an electronic device according to another embodiment of the present invention;

12 is a cross-sectional structural view of the electronic device of FIG. 11 taken along line I-I, in which only a partial structure of the electronic device is shown.

Detailed ways

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. . Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise. "Contact" or "touch" includes direct or indirect contact. For example, the bio-sensing module disclosed below is disposed inside the electronic device, such as under the protective cover, and the user's finger indirectly contacts the bio-sensing module through the protective cover.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be, for example, a fixed connection or a Disassembling the connection, or connecting integrally; may be mechanical connection, electrical connection or communication with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or mutual interaction of two elements Role relationship. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may repeat reference numerals and/or reference numerals in different examples, which are for the purpose of simplicity and clarity, and do not in themselves indicate the relationship between the various embodiments and/or settings discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.

Further, the described features, structures may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are set forth However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details or other structures, components, and the like. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

The embodiment of the present invention provides a bio-sensing module that realizes biometric information sensing, and the bio-sensing module can realize image display, and can also acquire a target object that contacts or approaches the bio-sensing module. Biometric information.

In some embodiments, please refer to FIG. 2 and FIG. 3 , FIG. 2 illustrates a structure of a bio-sensing module according to an embodiment of the present invention, and FIG. 3 illustrates a biological sense of another embodiment of the present invention. Test the structure of the module. The bio-sensing module 1 includes a display panel 100 and a photosensitive panel 200. The display panel 100 and the photosensitive panel 200 are stacked.

Specifically, the display panel 100 includes a plurality of display pixels 12. The display pixels 12 are, for example but not limited to, distributed in an array, that is, distributed in rows and columns. The plurality of display pixels 12 illuminate and emit light signals of different intensities and different colors, thereby realizing image display.

The photosensitive panel 200 is disposed in a stacked manner with the display panel 100, and the photosensitive panel 200 is located above or below the display panel 100 for sensing an optical signal to acquire predetermined biometric information of a target object touching or approaching the bio-sensing module 1. Further, the photosensitive panel 200 includes a substrate 26 and a plurality of photosensitive devices 220 formed on the substrate 26, and the photosensitive device 220 is configured to receive an optical signal and convert the received optical signal into a corresponding electrical signal. The substrate 26 may include a transparent substrate such as, but not limited to, a glass substrate, a plastic substrate, a crystal, a sapphire or the like, and a non-transparent substrate such as, but not limited to, a silicon substrate, a printed circuit board, a metal substrate, etc. . In addition, the substrate 26 may be a rigid material or a flexible material such as a flexible film. If the substrate 26 is a flexible material, the photosensitive panel 200 is not only thinner in thickness, but also applicable to an electronic device having a curved display screen.

In the embodiment of the present invention, the photosensitive panel 200 is disposed above the display panel 100. Therefore, in order not to affect the display of the display panel 100, the photosensitive panel 200 is provided with a first transparent region P1, and the first transparent region P1 and the display pixel 12 Corresponding settings are made for the optical signal emitted by the display panel 100 to pass through. Moreover, the photosensitive device 220 is of a light transmissive structure and is disposed in the first transparent region P1, that is, correspondingly above the display pixel 12.

When the bio-sensing module 1 is in operation, the display pixel 12 emits an optical signal to perform image display. When a target object, such as a finger, is placed over the bio-sensing module 1, the optical signal irradiated to the target object will be reflected due to the occlusion of the target object, and the reflected optical signal is received by the photo-sensing device 220, and the photo-sensing device 220 will receive The obtained optical signal is converted into a corresponding electrical signal, and according to the electrical signal, the biometric information of the target object can be obtained.

The biometric information of the target object is, for example but not limited to, skin texture information such as fingerprints, palm prints, ear prints, and soles, and other biometric information such as heart rate, blood oxygen concentration, and veins. The target object, such as but not limited to a human body, may also be other suitable types of objects.

Further, the bio-sensing module 1 further includes a driving circuit 30 for driving the display pixels 2 to light, and driving the photosensitive device 220 to perform light sensing. Specifically, when the driving circuit 30 is used to drive the partial display pixels 12 to be illuminated at the same time, the photosensitive device 220 facing the display pixel 12 that is driven and extinguished performs sensing.

Since the photosensitive device 220 is disposed corresponding to the display pixel 12, when the display pixel 12 is lit, the photosensitive device 220 corresponding to the display pixel 12 not only senses the optical signal reflected by the target object, but also senses the display pixel 12 The emitted light signal causes the optical signal emitted by the display panel 100 to interfere with the sensing of the biometric information of the target object. Therefore, the driving circuit 30 drives the display pixel 12 and the photosensitive device 220 to work together to improve the sensing accuracy of the bio-sensing module 1 .

In some embodiments, the driving circuit 30 may specifically include a display driving unit 31, a photosensitive driving unit 32, and a controller 33. The display driving unit 31 is configured to provide a display driving signal to the plurality of display pixels 12 to drive the display pixels 12 to illuminate. The photosensitive driving unit 32 is configured to provide a photosensitive driving signal to the plurality of photosensitive devices 220 to drive the photosensitive device 220 to perform light sensing. The controller 33 is configured to control the timing at which the display driving unit 31 provides the display driving signal, and control the timing at which the photosensitive driving unit 32 supplies the photosensitive driving signal, so that when the display pixel 12 is lit, the photosensitive device 220 corresponding to the display pixel 12 does not The light sensing is performed; when the display pixel 12 is turned off, the light sensing device 220 corresponding to the display pixel 12 performs light sensing.

Further, the driving circuit 30 further includes a signal processing unit 34 for receiving an electrical signal output from the photosensitive device 220, and acquiring a target contacting or approaching the biological sensing module 1 according to the electrical signal. Predetermined biometric information of the object.

It can be understood that the driving circuit 30 is not limited to the above-mentioned partial circuit units, and other circuit units may be disposed according to actual functional requirements, which will not be further described herein. In addition, each part of the circuit part can also implement other functions.

In some embodiments, the driving circuit 30 can be integrated in one or several chips, for example, the display driving unit 31, the photosensitive driving unit 32, the controller 33, and the signal processing unit 34 are each integrated into a corresponding function chip. Alternatively, part of the circuits in the driving circuit 30 are integrated in one chip or several chips, and the remaining circuits are disposed on the display panel 100 or the photosensitive panel 200.

Further, referring to FIG. 4, FIG. 4 shows the structure of a photosensitive panel according to an embodiment of the present invention. The photosensitive panel 200 further includes a plurality of photosensitive devices 220 and scan line groups and data line groups electrically connected to the plurality of photosensitive devices 220, wherein the scan line group includes a plurality of scan lines 201, and the data line group includes a plurality of data lines 202. . The plurality of photosensitive devices 220 are distributed in an array, such as a matrix distribution. Of course, it can also be distributed in other rule manners or in an irregular manner. A plurality of scanning lines 201 and a plurality of data lines 202 electrically connected to the photosensitive device 220 are disposed to cross each other and disposed between adjacent photosensitive devices 220. For example, a plurality of scanning lines G1, G2, ..., Gm are arranged at intervals in the Y direction, and a plurality of data lines S1, S2, ..., Sn are arranged at intervals in the X direction. However, the plurality of scanning lines 201 and the plurality of data lines 202 are not limited to the vertical arrangement shown in FIG. 5, and may be disposed at an angle, for example, 30°, 60°, or the like. In addition, since the scan line 201 and the data line 202 are electrically conductive, the scan line 201 and the data line 202 at the intersection position will pass through the insulating material. Material is isolated.

It should be noted that the distribution and the number of the scan lines 201 and the data lines 202 are not limited to the above-exemplified embodiments, and the corresponding scan line groups and data lines may be correspondingly arranged according to the structure of the photosensor 220. group.

In some embodiments, the plurality of scan lines 201 are connected to the photosensitive driving unit 32, and the plurality of data lines 202 are connected to a signal processing unit 34. The photosensitive driving unit 23 is configured to provide a corresponding scan driving signal and transmit it to the corresponding photosensitive device 220 through the corresponding scanning line 201 to activate the photosensitive device 220 to perform light sensing. The photosensitive driving unit 32 is formed on the substrate 26, and of course, it can also be electrically connected to the photosensitive device 220 through a connecting member (for example, a flexible circuit board), that is, a plurality of scanning lines 201 are connected. The signal processing unit 34 receives an electrical signal generated by the corresponding photosensitive device 220 performing light sensing through the data line 202 through a connector (for example, a flexible circuit board), and acquires biometric information of the target object based on the electrical signal. Of course, the signal processing unit 34 can also be formed on the substrate 26.

Please refer to FIG. 5. FIG. 5 is a diagram showing driving states of display pixels in the photosensitive device and the display panel in the photosensitive panel according to an embodiment of the present invention. It should be noted that the distribution of display pixels in the display panel of the figure and The distribution of the photosensitive member in the photosensitive panel is not limited thereto, and other distribution structures are also possible. By providing a scan driving signal to a scanning line 201a, the photosensitive device 220 connected to the scanning line 201a is driven to operate, and light sensing is performed. At this time, the display pixel 12b under the photosensitive device 220 is not lit, and is used for the light signal reflected by the target object to pass through. In order to achieve light sensing, the display pixels 12 in a row near the display pixel 12b, such as the display pixels 12a, are illuminated.

In some embodiments, when the display pixel 12a adjacent to the display pixel 12b is controlled to be lit, the display display pixel 12a is controlled to light up in a time-sharing manner. When the display pixels 12 are controlled to be time-divisionally lit, the interference of the optical signals reflected by the target object is less, that is, the mutual interference of the optical signals received between the adjacent photosensitive devices 220 is avoided, thereby improving the biological sensing. Sensing accuracy of the module 1.

In some embodiments, display pixels 12 are distributed in an array, ie, a plurality of display pixels 12 are arranged in rows and columns. Of course, the display pixels 12 can also be arranged in other rules. In the control of performing the light sensing, the display pixel 12 is divided into the first display pixel group and the second display pixel group correspondingly in odd-numbered rows and even-numbered rows, that is, all odd-numbered rows of display pixels are a group, and all even-numbered rows are displayed. The pixels are another group. When the bio-sensing module 1 performs light sensing, the driving circuit 30 (for example, the display driving unit 31) drives the display pixels of the same display pixel group to simultaneously illuminate, and drives the display pixels of different display pixel groups to be non-simultaneous. bright. Specifically, after the driving circuit 30 drives the lighting time of the display pixels of one of the first display pixel group and the second display pixel group for a preset time, then driving the display of another display pixel group is driven. The pixels are lit at the same time.

Correspondingly, since each photosensitive device 220 is disposed corresponding to a display pixel 12, the photosensitive device 220 is also The array distribution, that is, the plurality of photosensitive devices 220 are distributed in rows and columns. Moreover, the photosensitive device 220 is divided into a first photosensitive device group and a second photosensitive device group correspondingly in an odd-numbered row and an even-numbered row, wherein each row of the photosensitive device of the first photosensitive device group and each row of the first display pixel group display pixels The display pixels of each row of the second photosensitive device group and the display pixels of the second display pixel group are respectively disposed opposite to each other. When the display pixels of the first display pixel group are simultaneously illuminated, the driving circuit 30 (eg, the photosensitive driving unit 32) drives the photosensitive devices in the second photosensitive device group row by row to perform light sensing; in the second display pixel group When the display pixels are simultaneously lit, the drive circuit 30 drives the photosensitive devices in the first photosensitive device group row by row to perform light sensing.

Further, in some embodiments, since the target object, such as a finger, only occupies a part of the entire area of the photosensitive panel 200, when the photosensitive panel 200 is driven to perform light sensing, the entire photosensitive panel 200 is not required to be scanned. The biosensing module further includes a touch sensor (not shown) connected to the driving circuit 30, the driving circuit 30 further driving the touch sensor to perform touch sensing, when detecting that the target object touches or approaches When the bio-sensing module is described, the touch area of the target object on the bio-sensing module 1 is determined to drive the display pixels 12 corresponding to the touch area to light up and the light-sensing device 220 to perform light sensing. In this way, the biometric information sensing speed of the bio-sensing module is accelerated, and the photosensitive panel 200 can be driven to perform multiple scans in a limited time, thereby further improving the biometric information sensing accuracy of the bio-sensing module.

Further, referring to FIG. 6 and FIG. 7, the operational state of each row of photosensitive devices in the photosensitive panel 200 and the operational state of each row of display pixels in the display panel 100 are shown in FIGS. 6 and 7. Since the photosensitive device (not shown) in the photosensitive panel 200 and the display pixels (not shown) in the display panel 100 are correspondingly disposed, the photosensitive panel 200 includes 11 rows of photosensitive devices, and the display panel 100 includes 11 rows of display pixels corresponding to the photosensitive device. . For example, the display pixels of the first row, the third row, the fifth row, the eleventh row of the display panel 100 are the first display pixel group; the second row, the fourth row, the sixth row, the tenth row, the twelfth row The display pixel is the second display pixel group. The photosensitive device of the first row, the third row, the fifth row...the eleventh row of the photosensitive panel 200 is the first photosensitive device group; the second row, the fourth row, the sixth row, the eighth row, the tenth row, the first The 12-line photosensitive device is the second photosensitive device group.

When the light sensing is performed, the display pixels that are spaced apart by one line in the display panel 100 are simultaneously lit, and the remaining display pixels are turned off. As shown in FIG. 6, the display driving signal is provided to the display pixels of the first display pixel group, that is, the display pixels of the first row, the third row, the fifth row, the eleventh row of the driving display panel 100 are simultaneously illuminated. Since the second display pixel group does not provide the scan driving signal, the display pixels of the second row, the fourth row, the tenth row, and the twelveth row of the display panel 100 are turned off. Photosensitive driving signals are sequentially supplied to the photosensitive device of the second photosensitive device group, that is, the photosensitive devices of the second row, the fourth row, the sixth row, the eighth row, the tenth row, and the twelveth row in the photosensitive panel 200 are sequentially driven to be executed. Light sensing. When the photosensitive device of the 12th row performs the light sensing, that is, the predetermined time arrives, the display pixels driving the second display pixel group are simultaneously illuminated, and the first display image The display pixels of the prime group are extinguished. As shown in FIG. 7 , the display pixels of the second row, the fourth row, the sixth row, the tenth row, and the tenth row of the display panel 100 are simultaneously lit, and the first row and the third row of the panel 100 are displayed. The 11-line display pixels are turned off; the photosensitive devices of the 1st, 3rd, 5th, and 11th lines of the photosensitive panel 200 are driven line by line to perform light sensing. Thus, after two cycles of control, that is, after two predetermined times, all the photosensitive devices in the photosensitive panel 200 are completed to perform one light sensing.

Of course, the embodiment of the present invention may also adopt other control methods, such as performing light sensing on the line-by-line or interlace control photosensitive device, and controlling the corresponding display of the current line of the photosensitive device if the current photosensitive device is to perform light sensing. The pixel is not lit, and the display pixel of one line near the display pixel is not lit. In this way, the excess optical signal can be reduced to interfere with the light sensing of the current line of photosensitive devices.

Further, referring to FIG. 8 and FIG. 9, FIG. 8 shows a structure of an electronic device according to an embodiment of the present invention, and FIG. 9 shows a cross-sectional structure of the electronic device shown in FIG. 8 along line II, and FIG. 9 only A partial structure of the electronic device is shown. The electronic device is provided with the bio-sensing module of any one of the above embodiments, which is used for image display of an electronic device and for sensing biometric information of a target object contacting or approaching the electronic device.

Electronic devices such as, but not limited to, suitable types of electronic products such as consumer electronics, home electronics, vehicle-mounted electronic products, and financial terminal products. Among them, consumer electronic products such as mobile phones, tablets, notebook computers, desktop monitors, computer integrated machines. Home-based electronic products such as smart door locks, TVs, refrigerators, wearable devices, etc. Vehicle-mounted electronic products such as car navigation systems, car DVDs, etc. Financial terminal products such as ATM machines, terminals for self-service business, etc. The electronic device shown in FIG. 8 is exemplified by a mobile terminal type mobile terminal. However, the above-described bio-sensing module can also be applied to other suitable electronic products, and is not limited to a mobile phone type mobile terminal.

Specifically, a front surface of the mobile terminal 3 is provided with a display panel 100, and a protective cover 300 is disposed above the display panel 100. Optionally, the screen of the display panel 100 is relatively high, for example, 80% or more. The screen ratio refers to the ratio of the display area 101 of the display panel 100 to the front area of the mobile terminal 3. The photosensitive panel 200 is disposed above the display panel 100 and disposed under the protective cover 300.

In some embodiments, the photosensitive panel 200 is configured to perform biometric information sensing of a target object at an arbitrary position within a display area of the display panel 100. Specifically, for example, referring to FIG. 2 and FIG. 10 together, the display panel 100 has a display area 101 and a non-display area 102 defined by the light-emitting areas of all the display pixels 12 of the display panel 100, and areas other than the display area 101 As the non-display area 102, the non-display area 102 is used to set a circuit such as a display driving unit that drives the display pixels 12 or a line bonding area for connecting the flexible circuit boards. The photosensitive panel 200 has a sensing area 203 and a non-sensing area 204 defined by the sensing areas of all the photosensitive cells 22 of the photosensitive panel 200, and the area other than the sensing area 203 is the non-sensing area 204. Non-induct The measurement area 204 is for setting a circuit such as the photosensitive driving unit 32 that drives the photosensitive unit 22 to perform light sensing or a line bonding area for connecting the flexible circuit board. The shape of the sensing region 203 is consistent with the shape of the display region 101, and the size of the sensing region 203 is greater than or equal to the size of the display region 101, such that the photosensitive panel 200 can be placed at any position adjacent to or adjacent to the display region 101 of the display panel 100. Sensing of predetermined biometric information of the target object. Further, the area of the photosensitive panel 200 is less than or equal to the area of the display panel 100, and the shape of the photosensitive panel 100 is consistent with the shape of the display panel 100, so that the assembly of the photosensitive panel 200 and the display panel 100 is facilitated. However, in some embodiments, the area of the photosensitive panel 200 may also be larger than the area of the display panel 100.

When the mobile terminal 3 is in a bright screen state and is in the biometric information sensing mode, the display panel 100 emits an optical signal. When an object contacts or approaches the display area, the photosensitive panel 200 receives the optical signal reflected by the object, converts the received optical signal into a corresponding electrical signal, and acquires predetermined biometric information of the object according to the electrical signal. For example, fingerprint image information. Thereby, the photosensitive panel 200 can realize sensing of a target object contacting or approaching an arbitrary position of the display area.

In some embodiments, the sensing area 203 of the photosensitive panel 200 may also be smaller than the display area 101 of the display panel 100 to achieve predetermined biometric information of a target object of a local area of the display area 101 of the display panel 100. Sensing.

In some embodiments, the bio-sensing module of the embodiment of the present invention is applied to a mobile terminal 3, and a display panel 100 is disposed on the front surface of the mobile terminal. A protective cover 300 is disposed above the display panel 100. The screen of the display panel 100 is relatively high, for example, 80% or more. The screen ratio refers to the ratio of the actual display area of the display panel 100 to the front area of the mobile terminal. A bio-sensing area S for the target object to touch is provided at a mid-lower position of the actual display area of the display panel 100 to perform biometric information sensing of the target object. For example, if the target object is a finger, the bio-sensing area S Identify the area for fingerprints for fingerprint recognition. Correspondingly, a photosensitive panel 200 is disposed at a position corresponding to the fingerprint recognition area S below the display panel 100, and the photosensitive panel 200 is configured to acquire a fingerprint image of the finger when the finger is placed on the fingerprint recognition area S. It can be understood that the middle and lower positions of the display panel 100 are for the convenience of the finger to touch the position of the display panel 100 when the user holds the mobile terminal. Of course, it can also be placed at other locations that are convenient for finger touch.

In some embodiments, the electronic device further includes a touch sensor (not shown) for determining a touch area of the target object when a target object contacts the protective cover, The display pixel that drives the corresponding touch area is lit and the photosensitive device performs light sensing.

In some embodiments, the touch sensor is either integrated with the protective cover 300 or integrated with the photosensitive panel 200 or integrated with the display panel 100. Through the integrated touch sensor, not only the touch of the target object is realized Touch detection, but also reduce the thickness of the electronic device, which is conducive to the development of electronic devices in the direction of thinning.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. The specific features, structures, materials or characteristics described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

While the embodiments of the present invention have been shown and described above, it is understood that the foregoing embodiments are illustrative and are not to be construed as limiting the scope of the invention Variations, modifications, substitutions and variations of the embodiments described above are possible.

Claims (16)

A driving circuit of a biosensing module, the bio sensing module includes a display panel and a photosensitive panel stacked on the display panel; the display panel includes a plurality of display pixels; the photosensitive panel includes a plurality of photosensitive Each of the photosensitive devices is disposed opposite to a display pixel; and the driving circuit performs light sensing when the display portion of the display portion is illuminated while the driving portion is illuminated. A driving circuit according to claim 1, wherein said photosensitive device is configured to receive an optical signal and convert the received optical signal into an electrical signal; said driving circuit further comprising a signal processing unit, said signal processing unit Receiving an electrical signal from the output of the photosensitive device, and acquiring predetermined biometric information of the target object contacting or approaching the biosensing module according to the electrical signal. The driving circuit of claim 1 , wherein the display pixels are arranged in an array, and the display pixels are divided into a first display pixel group and a second display pixel group according to an odd row and an even row. When the driving circuit drives the photosensitive panel to perform light sensing, the driving circuit drives the display pixels of the same display pixel group to be lit at the same time, and the display pixels driving the different display pixel groups are not illuminated at the same time. The driving circuit according to claim 3, wherein the driving circuit drives the display pixels of one of the first display pixel group and the second display pixel group to illuminate for a preset time Then, the display pixels driving the other display pixel group are simultaneously lit. The driving circuit according to claim 3, wherein said plurality of photosensitive devices are arranged in an array, and said photosensitive device is divided into a first photosensitive device group and a second photosensitive device group correspondingly in odd-numbered rows and even-numbered rows, Wherein, each row of photosensitive devices of the first photosensitive device group and the respective rows of display pixels of the first display pixel group are disposed opposite to each other, and each row of photosensitive devices of the second photosensitive device group and the second display pixel group Each row of display pixels is disposed oppositely; the driving circuit is further configured to: when the display pixels of the first display pixel group are simultaneously illuminated, driving the photosensitive device in the second photosensitive device group row by row to perform light sensing; When the display pixels of the display pixel group are simultaneously lit, the photosensitive devices in the first photosensitive device group are driven row by row to perform light sensing. The driving circuit according to any one of claims 1 to 5, wherein the bio-sensing module further comprises a touch sensor, the driving circuit is further configured to drive the touch sensor to perform touch sensing, when When detecting that the target object touches or approaches the bio-sensing module, determining a touch area of the target object on the bio-sensing module to drive the display pixel corresponding to the touch area to emit light and the photosensitive device to perform light sensing. The driving circuit according to any one of claims 1 to 5, wherein the driving circuit is integrated in one or several chips; or part of the driving circuit is integrated in a chip or a few In the chip. A biosensing module includes a display panel and a photosensitive panel laminated with the display panel; the display panel includes a plurality of display pixels; the photosensitive panel includes a plurality of photosensitive devices; each photosensitive device is facing a Display pixel setting: The bio-sensing module further includes the driving circuit according to any one of claims 1 to 7, the driving circuit for driving display pixels to illuminate and driving the photosensitive device to perform light sensing. The bio-sensing module according to claim 8, wherein the display pixels are arranged in an array, and the display pixels are divided into a first display pixel group and a second display pixel group according to an odd row and an even row. When the photosensitive panel performs light sensing, the driving circuit drives the display pixels of the same display pixel group to simultaneously illuminate, and the display pixels driving the different display pixel groups are not illuminated at the same time. The bio-sensing module according to claim 9, wherein the driving circuit drives the display pixels of one of the first display pixel group and the second display pixel group to illuminate for a predetermined time. After the time, the display pixels that drive the other display pixel group are simultaneously illuminated. The bio-sensing module according to claim 8, wherein the plurality of photosensitive devices are arranged in an array, and the photosensitive device is divided into the first photosensitive device group and the second photosensitive device group according to the odd-numbered rows and the even-numbered rows. Each row of photosensitive devices of the first photosensitive device group and the respective rows of display pixels of the first display pixel group are disposed opposite to each other, and each row of photosensitive devices of the second photosensitive device group and the second display pixel group Each row of display pixels is disposed oppositely; when the display pixels of the first display pixel group are simultaneously illuminated, the driving circuit drives the photosensitive devices in the second photosensitive device group row by row to perform light sensing; in the second display pixel group When the display pixels are simultaneously lit, the driving circuit drives the photosensitive devices in the first photosensitive device group row by row to perform light sensing. The biosensing module according to any one of claims 8-11, wherein the photosensitive panel is located above the display panel, or the photosensitive panel is located below the display panel. The biosensing module according to claim 12, wherein the display panel has a display area; and the photosensitive panel is configured to perform biometric information sensing on a target object at an arbitrary position in a display area of the display panel. Or the photosensitive panel has a sensing area, and the shape of the sensing area is consistent with the shape of the display area, and the size of the sensing area is greater than or equal to the size of the display area. The biosensing module according to any one of claims 8-11, wherein the display panel has a bio-sensing area, and the photo-sensitive panel is located below the bio-sensing area. The biosensing module according to any one of claims 8-11, wherein the biosensing module further comprises a touch sensor connected to the driving circuit. An electronic device comprising the biosensing module according to any one of claims 8-15.

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