CN107944335B

CN107944335B - Photosensitive module, display module and electronic equipment

Info

Publication number: CN107944335B
Application number: CN201710708287.7A
Authority: CN
Inventors: 李问杰
Original assignee: Shenzhen Sunwave Technology Co Ltd
Current assignee: Liuzhou Zibo Technology Co.,Ltd.
Priority date: 2017-08-17
Filing date: 2017-08-17
Publication date: 2021-06-22
Anticipated expiration: 2037-08-17
Also published as: CN107944335A; CN113158868A

Abstract

The invention discloses a photosensitive module, a display module and an electronic device, wherein the photosensitive module comprises: the photosensitive device comprises a photosensitive panel, a light source and a control unit, wherein the photosensitive panel is used for sensing optical signals and comprises a substrate and a plurality of photosensitive units arranged on the substrate; the anti-aliasing imaging element is positioned above the photosensitive panel and used for preventing the optical signals received between the adjacent photosensitive units from aliasing; the anti-aliasing imaging element comprises a plurality of first light-transmitting areas for light signals to pass through, and the plurality of photosensitive units are correspondingly positioned below the plurality of first light-transmitting areas. The display module and the electronic equipment both comprise the photosensitive module.

Description

Photosensitive module, display module and electronic equipment

Technical Field

The invention relates to a photosensitive module, a display module and electronic equipment for sensing biological characteristic information.

Background

At present, a biological information sensor, especially a fingerprint sensor, has gradually become a standard component of electronic products such as mobile terminals. Because optical fingerprint identification sensor has stronger penetrability than capacitanc fingerprint identification sensor, consequently someone proposes an optical fingerprint identification module who is applied to mobile terminal. 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 a protective cover 401 of the mobile terminal. The light source 402 is disposed adjacent to one side of the optical fingerprint recognition sensor 400. When the finger F of the user touches the protective cover 401, the light signal emitted from 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 recognition sensor 400, and forms a fingerprint image of the finger F.

However, the optical fingerprint identification module can only be limited to be disposed in a predetermined area of the mobile terminal, for example, a non-display area of the mobile terminal, and the fingerprint identification module can be used only by contacting the predetermined area, which is still limited in use. Therefore, it is necessary to provide a structure that can be disposed in the display area and can realize fingerprint identification of any area in the display area.

Disclosure of Invention

The embodiment of the invention aims to solve at least one technical problem in the prior art. Therefore, the embodiment of the invention needs to provide a photosensitive module, a display module and an electronic device.

The embodiment of the invention provides a photosensitive module, which comprises:

the photosensitive device comprises a photosensitive panel, a light source and a control unit, wherein the photosensitive panel is used for sensing optical signals and comprises a plurality of photosensitive units; and

the anti-aliasing imaging element is positioned above the photosensitive panel and used for preventing the optical signals received between the adjacent photosensitive units from aliasing;

the anti-aliasing imaging element comprises a plurality of first light-transmitting areas for light signals to pass through, and the plurality of photosensitive units are correspondingly positioned below the plurality of first light-transmitting areas.

Because the reflection of different parts of the target object to the optical signal is different, the optical signal sensed by the adjacent photosensitive units in the photosensitive panel can be aliased, so that the acquired biological characteristic information is fuzzy, and the sensing precision of the photosensitive module is improved by arranging the anti-aliasing imaging element on the photosensitive panel.

In addition, the light sensing module provided by the invention not only realizes the sensing of the biological characteristic information of the target object in the display area, but also realizes the sensing of the biological characteristic information of the target object at any position in the display area.

In some embodiments, the photosensitive unit is disposed opposite to the first light-transmitting area. Therefore, the optical signal passing through the first light-transmitting area can be ensured to be completely received by the photosensitive unit, and the sensing precision of the photosensitive module is improved.

In some embodiments, the anti-aliasing imaging element is configured to pass optical signals approximately perpendicular to the light-sensing panel.

In some embodiments, the light signals approximately perpendicular to the light-sensing panel include light signals perpendicular to the light-sensing panel and light signals within a predetermined angular range offset from a perpendicular direction of the light-sensing panel.

In some embodiments, the anti-aliasing imaging element further comprises an absorbing wall, the absorbing wall enclosing the first light-transmitting region.

In some embodiments, the first light-transmitting areas are uniformly distributed. The uniformly distributed light transmission areas enable the preparation process of the anti-aliasing imaging element to be simpler.

In some embodiments, the light absorbing wall includes a plurality of light absorbing blocks and block-up blocks alternately stacked. The light absorption wall is formed by the stacking of the block with the block.

In certain embodiments, the block is made of a transparent material.

In some embodiments, the first light-transmitting region is filled with a transparent material. Transparent materials are filled in the first light transmission area, so that the strength of the anti-aliasing imaging element is increased, and the influence on the light transmission effect caused by the fact that impurities enter the first light transmission area can be avoided.

In certain embodiments, the anti-aliasing imaging element comprises a plurality of alternating layers of light absorbing and transparent support layers disposed in a stack; the light absorption layer comprises a plurality of light absorption blocks arranged at intervals; the transparent supporting layer is formed by filling transparent materials and also fills the intervals among the light absorption blocks; wherein the region corresponding to the space forms the first light-transmitting region.

Through the light absorption layer and the transparent supporting layer which are alternately stacked, the anti-aliasing imaging element is simpler to prepare, and the anti-aliasing effect of the anti-aliasing imaging element is ensured.

In certain embodiments, the thickness of each of the transparent support layers is not equal.

In certain embodiments, the thickness of the transparent support layer increases from layer to layer.

Through the thickness setting of the transparent supporting layer, the optical signal which is deviated from the vertical direction of the substrate and outside the preset angle range is prevented from passing through the anti-aliasing imaging element, and therefore the anti-aliasing effect of the anti-aliasing imaging element is improved.

In some embodiments, the anti-aliasing imaging element is directly formed on the photosensitive panel, or the anti-aliasing imaging element is separately manufactured and then disposed on the photosensitive panel.

In some embodiments, each of the photosensitive units has one or more first light-transmitting regions. The photosensitive unit corresponds to a plurality of first light-transmitting areas, and the anti-aliasing effect of the anti-aliasing imaging element is effectively improved.

In some embodiments, the photosensitive module further includes a filter disposed between the anti-aliasing imaging element and the photosensitive panel, or the anti-aliasing imaging element is disposed between the filter and the photosensitive panel, wherein the filter is configured to filter light signals outside a predetermined wavelength band.

In some embodiments, the predetermined wavelength band is a blue or green light signal.

According to the embodiment of the invention, the light filter film is arranged, so that the interference of ambient light is eliminated, and the sensing precision of the light-sensitive panel is improved.

In some embodiments, the photosensitive unit includes at least one photosensitive device, and the photosensitive device is selected to have high sensitivity to blue light signals or green light signals. Through the selection of sensitization device for this sensitization device is more sensitive to the sensing of blue light signal and green light signal, consequently has avoided the interference that red light signal caused in the ambient light to a certain extent, thereby has improved the sensing precision of sensitization module.

In some embodiments, the light sensing panel further comprises a substrate on which the plurality of light sensing units are disposed.

In some embodiments, the substrate is a silicon substrate, a metal substrate, a printed circuit board, or an insulating substrate.

In some embodiments, the substrate is further provided with a scan line group and a data line group electrically connected to the photosensitive unit, the photosensitive device further includes a driving circuit connected to the scan line group and a signal processing circuit connected to the data line group, the driving circuit is configured to provide a scan driving signal to the photosensitive unit through the scan line group to drive the photosensitive unit to perform light sensing; the signal processing circuit is used for reading out the signals sensed by the photosensitive unit and acquiring preset biological characteristic information of a target object contacting or approaching the upper part of the photosensitive panel according to the read-out signals.

In some embodiments, the driving circuit is disposed on the photosensitive panel or connected to the photosensitive panel through a connecting member, and the signal processing circuit is connected to the photosensitive panel through a connecting member.

In some embodiments, the photosensitive module is configured to sense fingerprint information.

In some embodiments, the photosensitive device is further configured to convert the sensed optical signal into an electrical signal, and obtain predetermined biometric information of the target object contacting or approaching the photosensitive panel according to the converted electrical signal.

An embodiment of the present invention provides a display module, including:

a display device including a display panel for performing image display, a light-transmitting area being provided in a display area of the display panel; and

the photosensitive module is arranged below the display panel and used for sensing the optical signal emitted from the light-transmitting area so as to acquire preset biological characteristic information of a target object contacting or approaching the display module; the photosensitive module is the photosensitive module of any one of the above embodiments.

In the embodiment of the invention, the display module comprises the photosensitive module of any one of the above embodiments, so that the display module has all the technical effects of the photosensitive module. In addition, the light sensing module utilizes the optical signal sent by the display device to sense the biological characteristic information of the target object, thereby saving the light source and reducing the cost of the display module.

In some embodiments, the anti-aliasing imaging elements, light-sensing panel, and the display panel are stacked.

In some embodiments, the display panel has a display area; the photosensitive panel is used for sensing biological characteristic information of a target object at any position in a part or all of the display area of the display panel; or the photosensitive panel is provided with a sensing area, the shape of the sensing area is consistent with that of the display area, and the size of the sensing area is larger than or equal to that of the display area. Therefore, the sensing module can sense the biological characteristic information of the target object at any position in part or all of the display area.

In some embodiments, the display panel includes a plurality of display pixels, and the display device further includes a display driving circuit for driving the plurality of display pixels to emit light, so as to be used as a light source for the photosensitive module to perform light sensing.

In some embodiments, the display device is further configured to perform touch sensing, and the display driving circuit drives the display pixels corresponding to the touch area to emit light after the display device detects a touch or proximity of a target object.

The embodiment of the invention provides electronic equipment which comprises a photosensitive module or a display module with any one of the structures. This electronic equipment is owing to have the sensitization module or the display module assembly of any above-mentioned structure, consequently has all above-mentioned beneficial effects of sensitization module assembly and display module assembly.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of an optical image sensing structure applied to an electronic device in the prior art;

FIG. 2 is a schematic view of a partial structure of a light-sensing panel according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of optical signals that can be passed through by the anti-aliasing imaging element in the photosensitive module shown in FIG. 2;

FIG. 4 is a schematic diagram of a partial structure of an anti-aliasing imaging element according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a partial structure of an anti-aliasing imaging element according to another embodiment of the invention;

FIG. 6 is a schematic diagram of a process for making the anti-aliasing imaging element shown in FIG. 5;

FIG. 7 is a schematic diagram of a partial structure of an anti-aliasing imaging element according to yet another embodiment of the invention;

FIG. 8 is a schematic view of a partial structure of a photosensitive module according to another embodiment of the invention;

FIG. 9 is a block diagram of a photosensitive device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of one embodiment of the photosensitive unit shown in FIG. 9;

FIG. 11 is a schematic structural view of another embodiment of the photosensitive unit shown in FIG. 9;

FIG. 12 is a schematic view of a partial structure of a display module according to an embodiment of the invention;

FIG. 13 is a schematic view of a partial structure of a display panel in the display module shown in FIG. 12;

FIG. 14 is a schematic diagram illustrating relative positions of a sensing device and a display pixel in a display module according to an embodiment of the invention;

FIG. 15 is a schematic diagram illustrating relative positions of a sensing device and a display pixel in a display module according to yet another embodiment of the present invention;

FIG. 16 is a schematic diagram illustrating relative positions of a sensing device and a display pixel in a display module according to yet another embodiment of the present invention;

FIG. 17 is a schematic diagram illustrating relative positions of a sensing device and a display pixel in a display module according to yet another embodiment of the present invention;

FIG. 18 is a diagram illustrating a relationship between a display area of a display panel and a sensing area of a light-sensing panel according to an embodiment of the present invention;

FIG. 19 is a schematic front view of a display module applied to an electronic device according to an embodiment of the invention;

fig. 20 is a schematic cross-sectional structure view of the electronic device in fig. 19 taken along line I-I, in which only a partial structure of the electronic device is shown.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

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

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and settings of a specific example are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other structures, components, and so forth. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

The embodiment of the invention provides a photosensitive module, which is used for sensing an optical signal reflected by a target object when the target object contacts or approaches the photosensitive module, converting the sensed optical signal into a corresponding electric signal, and acquiring preset biological characteristic information of the target object according to the converted electric signal.

In some embodiments, referring to fig. 2, fig. 2 shows a partial structure of a photosensitive module according to an embodiment of the invention. The photosensitive module 2 includes a photosensitive device 20 (see fig. 9) and an anti-aliasing imaging element 28. The photosensitive device 20 further includes a photosensitive panel 200, and the photosensitive panel 200 includes a substrate 26 and a plurality of photosensitive units 22 disposed on the substrate 26. The plurality of light sensing units 22 are used for sensing light signals and converting the sensed light signals into corresponding electrical signals. The light sensing device 20 is further adapted to convert the sensed optical signal into an electrical signal and acquire predetermined biometric information of the target object contacting or approaching the light sensing panel 200 based on the converted electrical signal. The anti-aliasing imaging element 28 is disposed above the photosensitive panel 200, and is used for preventing aliasing of the optical signals received between the adjacent photosensitive units 22. Further, the anti-aliasing imaging element 28 includes a plurality of first light-transmitting regions 282 for light signals to pass through, and the plurality of light-sensing units 22 are correspondingly disposed below the plurality of first light-transmitting regions 282.

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

In the photosensitive module 2 according to the embodiment of the invention, the anti-aliasing imaging element 28 is disposed on the photosensitive panel 200 provided with the photosensitive unit 22, and the photosensitive unit 22 is disposed corresponding to the first light-transmitting region 282 of the anti-aliasing imaging element 28, so that the biological characteristic information obtained after the photosensitive unit 22 performs the light sensing is clearer, and the sensing accuracy of the photosensitive device 20 is improved.

In some embodiments, the light sensing unit 22 is disposed opposite to the first light-transmitting area 282, so that it can be ensured that all the light signals passing through the first light-transmitting area 282 are received by the light sensing unit 22, and the sensing accuracy of the light sensing device 20 is improved.

In some embodiments, the anti-aliasing imaging component 28 has light absorbing properties, and only light signals that are approximately perpendicular to the substrate 26 of the light signals impinging on the anti-aliasing imaging component 28 can pass through the first light-transmitting region 282 of the anti-aliasing imaging component 28 and be received by the light-sensing unit 22, and the rest of the light signals are absorbed by the anti-aliasing imaging component 28. In this manner, aliasing of the optical signals received between adjacent light-sensing units 22 can be prevented. It should be noted that the optical signal approximately perpendicular to the substrate 26 includes an optical signal perpendicular to the substrate 26 and an optical signal within a predetermined angle offset from the perpendicular direction of the substrate 26. The preset angle range is within ± 20 °.

In some embodiments, as shown in FIG. 3, FIG. 3 illustrates the range of the optical signal passing through the anti-aliasing imaging component 28. Due to the light absorption characteristics of the anti-aliasing imaging element 28, only the light signal between the light signal L1 and the light signal L2 can reach the light sensing unit 22 through the first light-transmitting region 282, and the rest of the light signal is absorbed by the light-absorbing wall 281 of the anti-aliasing imaging element 28. As can be seen from fig. 3, the smaller the cross-sectional area of the first light-transmitting region 282, the smaller the range of the angle α of the optical signal passing through the first light-transmitting region 282, and therefore the better the anti-aliasing effect of the anti-aliasing imaging element 28. In this way, the anti-aliasing effect of the anti-aliasing imaging element 28 can be improved by the first light-transmitting region 282 having a smaller area provided by the anti-aliasing imaging element 28. In addition, since the cross-sectional area of the first light-transmitting region 282 of the anti-aliasing imaging element 28 is smaller, each of the light-sensing units 22 corresponds to a plurality of light-transmitting first light-transmitting regions 282, so that the light-sensing units 22 can sense sufficient light signals, and the sensing accuracy of the light-sensing module 2 is improved.

In some embodiments, with continued reference to fig. 2, the anti-aliasing imaging element 28 includes a light absorbing wall 281, and the first light-transmitting regions 282 are surrounded by the light absorbing wall 282. The light absorbing walls 281 are formed of a light absorbing material. The light absorbing material includes metal oxides, carbon black paint, black ink, and the like. The metal in the metal oxide is, for example, but not limited to, one or more of chromium (Cr), nickel (Ni), iron (Fe), tantalum (Ta), tungsten (W), titanium (Ti), and molybdenum (Mo). The first light-transmitting region 282 has an axial extending direction perpendicular to the substrate 26, so that, of the light signals irradiated to the anti-aliasing imaging element 28, the light signals in a direction approximately perpendicular to the substrate 26 can pass through the first light-transmitting region 282, and the rest of the light signals are absorbed by the light-absorbing wall 281.

Further, referring to fig. 4, fig. 4 shows a structure of the anti-aliasing imaging element 28 according to an embodiment of the invention. The light absorption wall 281 has a multi-layer structure, and includes light absorption blocks 281a and block elevations 281b alternately stacked. In one embodiment, the light absorbing blocks 281a are formed of a light absorbing material. Such as, but not limited to, metal oxides, carbon black coatings, black inks, and the like. The metal in the metal oxide is, for example, but not limited to, one or more of chromium (Cr), nickel (Ni), iron (Fe), tantalum (Ta), tungsten (W), titanium (Ti), and molybdenum (Mo). The raised blocks 281b are, for example, but not limited to, transparent layers formed of transparent materials, such as translucent materials, light absorbing materials, and the like.

In some embodiments, the light absorption blocks 281a in the same layer are spaced apart, and the region corresponding to the space between the light absorption blocks 281a in the same layer is the first light transmission region 282. Further, the plurality of light absorption blocks 281a and the plurality of block-up blocks 281b of the same layer may be manufactured at one time. Specifically, by providing a mask, the mask is an integrally formed membrane, and the membrane forms an opening corresponding to the position of the light absorption block 281a, and the shape and size of the opening are consistent with the shape and size of the light absorption block 283. The light absorbing blocks 281a and the step-up blocks 281b alternately arranged are sequentially vapor-deposited on a support through the mask, thereby forming the anti-aliasing imaging element 28.

The height of the height block 281b is set to not only speed up the fabrication process of the anti-aliasing imaging device 28, but also ensure the anti-aliasing effect of the anti-aliasing imaging device 28.

In some embodiments, the first transparent region 282 may be filled with a transparent material to increase the strength of the anti-aliasing imaging element layer, and to prevent impurities from entering the first transparent region 282 to affect the light transmission effect. In order to ensure the light-transmitting effect of the first light-transmitting region 282, the transparent material may be a material with a relatively high light transmittance, such as glass, PMMA (acrylic), PC (polycarbonate), or the like.

In some embodiments, referring to fig. 5, fig. 5 shows a structure of an anti-aliasing imaging element according to another embodiment of the invention. The anti-aliasing imaging element 28 is a multilayer structure, and the anti-aliasing imaging element 28 comprises light absorbing layers 283 and transparent support layers 284 which are alternately stacked; the light absorbing layer 283 includes a plurality of light absorbing blocks 283a arranged at intervals; the transparent support layer 284 is formed by filling a transparent material, and also fills the gaps 283b between the light absorption blocks 283 a; wherein the region corresponding to the space 283b forms the first light transmission region 282.

Further, referring to fig. 6, fig. 6 shows a process for manufacturing the anti-aliasing imaging element according to an embodiment of the invention. Specifically, when the anti-aliasing imaging element 28 is prepared, a layer of light absorbing material is coated on a carrier, and the light absorbing material layer is etched away from the portion corresponding to the first light-transmitting region 282, and the unetched portion forms a plurality of light absorbing blocks 283 a. Such as, but not limited to, photolithography, X-ray lithography, electron beam lithography, and ion beam lithography. And the etching type may include both dry etching and wet etching. Then, a transparent material is coated on the etched light absorption blocks 283, and the transparent material not only covers the plurality of light absorption blocks 283a, but also fills the spaces 283b between the plurality of light absorption blocks 283a, thereby forming the transparent support layer 284. Then, a plurality of light absorbing blocks 283a are formed on the transparent support layer 284 in the manner in which the light absorbing layer 283 is formed, and so on, a plurality of light absorbing layers 283 and transparent support layers 284 which are alternately laminated are formed, thereby forming the anti-aliasing imaging element 28.

Further, in order to ensure the light-transmitting effect of the first light-transmitting region 282, the transparent material forming the transparent supporting layer 284 may be a material with a relatively high light transmittance, such as glass, PMMA (acrylic), PC (polycarbonate), epoxy resin, or the like.

In some embodiments, referring to fig. 7, fig. 7 shows a structure of an anti-aliasing imaging element according to another embodiment of the invention. The anti-aliasing imaging element 28 comprises light absorbing layers 283 and transparent support layers 284 arranged in alternating layers, with each layer of transparent support layer 284 having an unequal thickness. I.e., thicknesses h1, h2, and h3 in fig. 7 are not equal in value. Optionally, the thickness of the transparent support layer 284 increases layer by layer, i.e., h1 < h2 < h 3. Thus, the optical signals which are not shifted by ± 20 ° from the vertical direction of the substrate can be prevented from passing through the transparent supporting layer 284 between the light-absorbing blocks 283a, thereby improving the sensing accuracy of the photo module 2. It should be noted that the thickness parameter of each transparent supporting layer 284 and the width and height parameters of the light absorbing block 283a can be set differently and in various combinations to improve the sensing accuracy of the photosensitive module 2.

In some embodiments, the anti-aliasing imaging components 28 are formed directly on the photosensitive panel 200, i.e., the anti-aliasing imaging components 28 are formed on the photosensitive panel 200 with the photosensitive cells 22. Alternatively, the anti-aliasing imaging device 28 is formed separately and then disposed on the photosensitive panel 200 having the photosensitive unit 22, thereby speeding up the manufacturing process of the photosensitive module 2.

In some embodiments, the plurality of first light-transmitting regions 282 in the anti-aliasing imaging component 28 are uniformly distributed, thereby making the fabrication process of the anti-aliasing imaging component 28 simpler.

In some embodiments, taking an object as an organism such as a finger as an example, when the finger contacts or approaches the photosensitive module 2, if the finger is irradiated with ambient light, and the finger has many tissue structures such as epidermis, bone, flesh, blood vessels, etc., part of the optical signal in the ambient light penetrates the finger, and part of the optical signal is absorbed by the finger. The light signal penetrating through the finger reaches the light sensing unit 22, and at this time, the light sensing unit 22 not only senses the light signal reflected by the target object, but also senses the light signal of the environment light penetrating through the finger, so that accurate sensing cannot be performed. Therefore, to avoid the influence of the ambient light on the sensing of the target object by the photosensitive unit 22, please refer to fig. 8, and fig. 8 shows a structure of a photosensitive module according to another embodiment of the present invention. The photosensitive module 2 further includes a filter 29, wherein the filter 29 is disposed between the anti-aliasing imaging device 28 and the photosensitive panel 200, and the filter is used for filtering light signals outside a predetermined wavelength band. Alternatively, the anti-aliasing imaging component 28 is disposed between the filter 29 and the photosensitive panel 200, for example, the filter 29 is disposed on a side of the anti-aliasing imaging component 28 away from the photosensitive panel 200.

In the embodiment of the invention, the optical filter 29 filters the optical signals outside the preset waveband from the reflected optical signals, thereby improving the sensing accuracy of the photosensitive module 2.

In some embodiments, the predetermined wavelength band is a wavelength band corresponding to the blue light signal, i.e., the filter 29 filters out light signals other than the blue light signal.

In some embodiments, the predetermined wavelength band is a wavelength band corresponding to green light signals, i.e., the filter 29 filters light signals other than the green light signals.

Among the red light signal, the blue light signal, and the green light signal of the ambient light, the target object F such as a finger absorbs the red light signal weakest, and absorbs the blue light signal strongest next to the green light signal. I.e. ambient light is shining on the finger, a large amount of the blue light signal is absorbed by the finger, and only a small amount, even no blue light signal penetrates the finger. Therefore, the light signals of the wavelength bands other than the blue light signals or the green light signals are selected for filtering, so that the interference of the ambient light can be greatly eliminated, and the sensing precision of the photosensitive module 2 is improved.

In certain embodiments, the substrate 26 may include both transparent substrates, such as, but not limited to, glass substrates, plastic substrates, crystal, sapphire, and like insulating substrates, and non-transparent substrates, such as, but not limited to, silicon substrates, printed circuit boards, metal substrates, and the like. In addition, the substrate 26 may be a rigid material or a flexible material, such as a flexible film. If the substrate 26 is made of a flexible material, the photosensitive module 2 not only has a thin thickness, but also can be applied to an electronic device having a curved display screen.

In some embodiments, referring to fig. 9, fig. 9 shows a structure of a photosensitive device according to an embodiment of the invention. The photosensitive device 20 includes a photosensitive panel 200, a plurality of photosensitive units 22 are distributed on a substrate 26 in an array, and for example, a scan line group and a data line group are formed on the substrate 26 and electrically connected to the photosensitive units 22, the scan line group is used for transmitting a scan driving signal to the photosensitive units 22 to activate the photosensitive units 22 to perform optical sensing, and the data line group is used for outputting an electrical signal generated by the photosensitive units performing optical sensing. The substrate 26 is not limited to a silicon substrate, a metal substrate, a printed circuit board, and the like, and may be an insulating substrate such as a glass substrate, a plastic substrate, crystal, and sapphire.

Specifically, the photosensitive units 22 are distributed in an array, such as a matrix. Of course, other regular or irregular distributions are also possible. The scan line group includes a plurality of scan lines 201, the data line group includes a plurality of data lines 202, and the plurality of scan lines 201 and the plurality of data lines 202 are disposed to cross each other and disposed between the adjacent photosensitive cells 22. For example, a plurality of scan 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 scan lines 201 and the plurality of data lines 202 may be arranged at a certain angle, for example, 30 ° or 60 °, instead of being arranged perpendicularly as shown in fig. 10. In addition, due to the conductivity of the scan lines 201 and the data lines 202, the scan lines 201 and the data lines 202 at the crossing positions are isolated from each other by an insulating material.

It should be noted that the arrangement of the distribution and number of the scanning lines 201 and the data lines 202 is not limited to the above-mentioned exemplary embodiment, and corresponding scanning line groups and data line groups may be correspondingly arranged according to the structure of the photosensitive unit 22.

Furthermore, the plurality of scanning lines 201 are connected to a photosensitive driving circuit 23, and the plurality of data lines 202 are connected to a signal processing circuit 25. The photosensitive driving circuit 23 is configured to provide a corresponding scanning driving signal, and transmit the scanning driving signal to the corresponding photosensitive unit 22 through the corresponding scanning line 201, so as to activate the photosensitive unit 22 to perform the light sensing. The photosensitive driving circuit 23 is formed on the substrate 26, and may be electrically connected to the photosensitive unit 22 through a connecting component (e.g., a flexible circuit board), i.e., connected to the plurality of scanning lines 201. The signal processing circuit 25 receives an electric signal generated by the corresponding light sensing unit 22 performing light sensing through the data line 202, and acquires biometric information of the target object based on the electric signal.

In some embodiments, the photosensitive device 20 including the photosensitive panel 200 further includes a controller 27, in addition to the signal processing circuit 25 and the photosensitive driving circuit 23, the controller 27 is configured to control the driving circuit to output a corresponding scanning driving signal, such as but not limited to activating the photosensitive units 22 line by line to perform the photosensitive process. The controller 27 is further configured to control the signal processing circuit 25 to receive the electrical signals output by the light sensing units 22, and generate the biometric information of the target object according to the electrical signals after receiving the electrical signals output by all the light sensing units 22 performing the light sensing.

Further, the signal processing circuit 25 and the controller 27 may be selectively formed on the substrate 26 or electrically connected to the photosensitive unit 22, for example, by a connector (e.g., a flexible circuit board) according to the type of the substrate 26. For example, when the substrate 26 is a silicon substrate, the signal processing circuit 25 and the controller 27 may be selectively formed on the substrate 26, or may be selectively electrically connected to the light sensing unit 22 through a flexible circuit board, for example; when the substrate 26 is an insulating substrate, the signal processing circuit 25 and the controller 27 need to be electrically connected to the light sensing unit 22, for example, through a flexible circuit board.

In some embodiments, referring to fig. 10, fig. 10 illustrates a connection structure of the light sensing unit 22, the scan line 201 and the data line 202 according to an embodiment. The light sensing unit 22 includes at least one light sensing device 220 and a switching device 222. The switch device 220 has a control terminal C and two signal terminals, such as a first signal terminal Sn1 and a second signal terminal Sn 2. The control terminal C of the switching device 220 is connected to the scan line 201, the first signal terminal Sn1 of the switching device 222 is connected to a reference signal L via the light sensing device 220, and the second signal terminal Sn2 of the switching device 222 is connected to the data line 202. It should be noted that the photosensitive unit 22 shown in fig. 10 is for illustration only, and is not limited to other constituent structures of the photosensitive unit 22.

Specifically, the photosensitive device 220 may be, for example, but not limited to, any one or more of a photodiode, a phototransistor, a photodiode, a photoresistor, and a thin film transistor. Taking a photodiode as an example, negative voltages are applied to two ends of the photodiode, at this time, when the photodiode receives an optical signal, a photocurrent proportional to the optical signal is generated, and the larger the intensity of the received optical signal is, the higher the generated photocurrent is, the higher the speed of voltage drop on the cathode of the photodiode is, so that by collecting voltage signals on the cathode of the photodiode, the intensities of optical signals reflected by different parts of a target object are obtained, and further, biological characteristic information of the target object is obtained. It is understood that a plurality of the light sensing devices 220 are provided if the light sensing effect of the light sensing devices 220 is to be increased.

Further, the switching device 222 is, for example, but not limited to, any one or more of a triode, a MOS transistor, and a thin film transistor. Of course, the switching device 222 may also include other types of devices, and the number may also be 2, 3, etc.

In some embodiments, in order to further improve the sensing accuracy of the photo sensor module 2, the photo sensor device 220 with high sensitivity to blue or green light signals may be selected. The light sensing is performed by selecting the light sensing device 220 with high light sensing sensitivity to the blue light signal or the green light signal, so that the light sensing device 220 is more sensitive to the light sensing of the blue light signal or the green light signal, and therefore, the interference caused by the red light signal in the ambient light is also avoided to a certain extent, and the sensing precision of the light sensing module 2 is improved.

Taking the structure of the light sensing unit 22 shown in fig. 10 as an example, the gate of the thin film transistor TFT is used as the control terminal C of the switching device 222, and the source and the drain of the thin film transistor TFT correspond to the first signal terminal Sn1 and the second signal terminal Sn2 used as the switching device 222. The gate of the thin film transistor TFT is connected to the scanning line 201, the source of the thin film transistor TFT is connected to the cathode of the photodiode D1, and the drain of the thin film transistor TFT is connected to the data line 202. The anode of the photodiode D1 is connected to a reference signal L, which is, for example, a ground signal or a negative voltage signal.

When the photosensitive unit 22 performs the photosensitive process, a driving signal is applied to the gate of the thin film transistor TFT through the scanning line 201 to drive the thin film transistor TFT to be turned on. At this time, the data line 202 is connected to a positive voltage signal, when the TFT is turned on, the positive voltage signal on the data line 202 is applied to the cathode of the photodiode D1 through the TFT, and since the anode of the photodiode D1 is grounded, a reverse voltage is applied across the photodiode D1, so that the photodiode D1 is in a reverse bias state, i.e., in an operating state. At this time, when an optical signal is irradiated to the photodiode D1, the reverse current of the photodiode D1 rapidly increases, thereby causing a current change on the photodiode D1, which can be obtained from the data line 202. Since the larger the intensity of the optical signal is, the larger the generated reverse current is, the intensity of the optical signal can be obtained according to the current signal acquired on the data line 202, and thus the biometric information of the target object can be obtained.

In some embodiments, the reference signal L may be a positive voltage signal, a negative voltage signal, a ground signal, or the like. It is within the scope of the present invention that the electrical signal provided on the data line 202 and the reference signal L are applied to both ends of the photodiode D1, so that a reverse voltage is formed across the photodiode D1 to perform the light sensing.

It is to be understood that the connection method of the thin film transistor TFT and the photodiode D1 in the light sensing unit 22 is not limited to the connection method shown in fig. 10, and may be other connection methods. For example, as shown in fig. 11, a connection structure of the photosensitive unit 22 with the scanning line 201 and the data line 202 according to another embodiment of the present invention is shown. The gate G of the thin film transistor TFT is connected to the scanning line 201, the drain D of the thin film transistor TFT is connected to the positive electrode of the photodiode D1, and the source S of the thin film transistor TFT is connected to the data line 202. The cathode of the photodiode D1 is connected to a positive voltage signal.

Referring to fig. 12, fig. 12 shows a partial structure of a display module 1 according to an embodiment of the invention. The display module 1 includes a display device (not shown) and a photosensitive module 2. The display device further includes a display panel 100 for displaying an image, and a second light-transmitting region (not shown) is disposed in the display region of the display panel 100. The photo sensor module 2 is the photo sensor module 2 of any of the above embodiments, and the photo sensor module 2 is disposed below the display panel 100 and is configured to sense the optical signal emitted from the second light-transmitting region to obtain the predetermined biometric information of the target object contacting or approaching the display module 1.

Because the photosensitive module 2 is located below the display panel 100, the display panel 100 has a second light-transmitting area through which the optical signal reflected by the target object passes, so that the photosensitive panel 200 in the photosensitive module 2 can receive the optical signal passing through the display panel 100, convert the received optical signal into an electrical signal, and acquire the predetermined biological characteristic information of the target object contacting or approaching the display module 1 according to the converted electrical signal.

In some embodiments, in order to ensure that the light signal passing through the display panel 100 is received by the photo module 2, the photo sensor device 220 (refer to fig. 10) in the photo module 2 is disposed below the second light-transmitting region. Further, the light sensor 220 is disposed opposite to the second light-transmitting area, so that the light signals passing through the display panel 100 are all received, and the sensing accuracy of the light sensing module 2 is improved.

In some embodiments, with continued reference to fig. 12, the anti-aliasing imaging components 28 in the photosensitive module 2 and the photosensitive panel 200 are stacked on top of the display panel 100, i.e., the anti-aliasing imaging components 28 are located between the photosensitive panel 200 and the display panel 100.

In some embodiments, when the display module 1 is in operation, the display panel 100 emits a light signal to achieve a corresponding display effect. At this time, if a target object touches or touches the display module 1, the optical signal emitted by the display panel 100 reaches the target object and is reflected, the reflected optical signal is received by the photosensitive panel 200, and the photosensitive panel 200 converts the received optical signal into an electrical signal corresponding to the optical signal. The signal processing circuit 25 (see fig. 9) in the photosensitive module 2 obtains the predetermined biometric information of the target object according to the electrical signal generated by the photosensitive panel 200.

In some embodiments, the display panel 100 is not limited to an OLED display device, but any display device that can achieve a display effect and has a light-transmitting region through which a light signal passes is within the scope of the present invention.

Referring to fig. 13, fig. 13 shows a partial structure of an OLED panel of an embodiment of a display panel. Taking the display panel 100 as an OLED display panel as an example, the display panel 100 further includes a transparent substrate 101. The display pixel 12 includes an anode 102 formed on a transparent substrate 101, a light-emitting layer 103 formed on the anode 102, and a cathode 104 formed on the light-emitting layer 103. When a voltage signal is applied to the anode 102 and the cathode 104, a large number of carriers accumulated on the anode 102 and the cathode 104 will move to the light-emitting layer 103 and enter the light-emitting layer 103, so as to excite the light-emitting layer 103 to emit a corresponding light signal.

In certain embodiments, the anode 102 and cathode 104 are made of an electrically conductive material. For example, the anode 102 is made of a suitable conductive material such as Indium Tin Oxide (ITO), and the cathode 104 is made of a suitable conductive material such as metal or ITO. The display panel 100 is not limited to the OLED display panel, and may be other suitable types of display panels. The display panel 100 may be a rigid panel made of a rigid material, or may be a flexible panel made of a flexible material. Also, the OLED display panel of the embodiments of the present invention may be a bottom emission type device, a top emission type device, or other suitable structural type display device.

Further, referring to fig. 14, fig. 14 shows a structure of a display module according to an embodiment of the invention. The display pixel 12 includes three display pixels, i.e., a red pixel R, a green pixel G and a blue pixel B, wherein the light signal emitted from the red pixel R is a red light signal, the light signal emitted from the green pixel G is a green light signal, and the light signal emitted from the blue pixel B is a blue light signal. The light-emitting layer in the red pixel R uses a light-emitting material that emits a red light signal, the light-emitting layer in the green pixel G uses a light-emitting material that emits a green light signal, and the light-emitting layer in the blue pixel B uses a light-emitting material that emits a blue light signal. Of course, the display pixels 12 may also include black pixels, white pixels; or a red pixel, a green pixel, a blue pixel, a white pixel, etc. In addition, the display panel 100 may also adopt other display technologies to realize display, for example, a color conversion technology, in which light emitted from a blue OLED is absorbed by a fluorescent dye and then converted into red, green, and blue light signals. The display pixels 12 in the display panel 100 are not limited to the arrangement shown in fig. 14, and may have another arrangement, for example, a pentiel arrangement.

Referring to fig. 14, a gap H is formed between adjacent display pixels, and the gap H has a second transparent region. The photo sensing devices 220 in the photo sensing unit 22 are correspondingly disposed below the interval H between the adjacent display pixels. Such as but not limited to directly below, may be any location where sufficient optical signals are received. It can be understood that, the more the light signal passes through the interval H, the higher the sensing accuracy of the photosensitive module 2.

Referring to fig. 15, fig. 15 shows a relative position relationship between a sensing device and a display pixel in a light sensing unit according to an embodiment, the display pixel 12 has a transparent display pixel structure, and the display pixel 12 includes, but is not limited to, three display pixels, i.e., a red pixel R, a green pixel G, and a blue pixel B. The light sensing device 220 of the light sensing unit 22 is correspondingly disposed below the display pixel 12.

The embodiment of the invention utilizes the light transmittance of the display pixels 12 to receive the light signals reflected by the target object and passing through the display pixels, and performs the biological characteristic information sensing on the target object. In addition, since the photosensitive device 220 is disposed below the display pixel 12, the photosensitive surface of the photosensitive device 220 can be equal to the area of the display pixel 12, and thus the structure of the existing display panel can be utilized, the manufacturing cost of the display module 1 is reduced, and sufficient optical signals in the optical signals passing through the display pixel 12 are received by the photosensitive device 220, so that the sensing accuracy of the photosensitive module 2 is improved.

Further, the display panel 100 further includes a driving circuit (not shown) for driving each display pixel 12 to emit light, and the display device further includes a display driving circuit (not shown), and the corresponding driving circuit may be disposed between the display pixels 12 or disposed below the display pixels 12. The display driving circuit may be disposed on the display panel 100, or may be connected to the display pixels 12 through a flexible circuit board. The display driving circuit is used for driving the plurality of display pixels 12 to emit light, so as to be used as a light source when the photosensitive module 2 performs light sensing.

In some embodiments, the light sensing device 220 is located below any one or more of the three display pixels red, blue, and green, and by being located below the display pixels 12, it is possible to ensure that more light signals are received by the light sensing device 220. The light sensing device 220 is located below the blue display pixel B, as shown in fig. 15, for example. In addition, in order to prevent interference of other optical signals, a filter 29 may be disposed on the light sensing device 220. The filter 29 is used for filtering light signals outside a predetermined wavelength band. For example, if all the optical signals other than the blue light signal are interference signals, a blue filter is provided to filter the optical signals other than the wavelength band corresponding to the blue light signal. It should be noted that, since the photosensitive panel 200 is disposed below the display panel 100, the filter 29 can be independently disposed and then attached to the photosensitive panel 200, so that the preparation process of the filter 29 is simpler.

In some embodiments, referring to fig. 16, fig. 16 shows a partial structure of a display module according to another embodiment of the present invention. In this embodiment, the light emitting layers 103 of the display pixels 12 each emit white light, and the light emitting side of the display pixels 12 is provided with a CF film 13, and the CF film 13 is used for filtering the white light emitted by the display pixels 12 to form three light signals of red, green, and blue. Specifically, the CF film 13 includes three kinds of photo-resists, i.e. three kinds of photo-resists of red, green and blue are arranged corresponding to three kinds of display pixels, and when white light emitted from the light emitting layer 103 passes through the CF film 13, red light signals, green light signals and blue light signals are emitted correspondingly. In other words, when the light signal reflected by the target object passes through the display panel 100, the red light signal is filtered when passing through the blue or green photoresist of the CF film 13. Therefore, the sensing device 220 in the light sensing unit 22 is disposed right under the display pixel 12 corresponding to the blue photoresist and/or the green photoresist, so as to eliminate the influence of the interference signal, thereby improving the sensing accuracy of the light sensing module 2.

In some embodiments, referring to fig. 17, fig. 17 shows a partial structure of a display module according to another embodiment of the present invention, in order to enhance the intensity of the optical signal emitted by the display pixel, the display pixel is provided with a corresponding micro-resonant cavity structure 14, the micro-resonant cavity structure 14 generates a micro-resonance effect on the optical signal with a specific wavelength, so that the optical signal with the specific wavelength is enhanced in the emission direction, and the optical signals with wavelengths other than the specific wavelength can pass through the micro-resonant cavity structure 14. For example, the micro-cavity structure corresponding to the red display pixel R can enhance the emitted red light signal, and the rest of the light signal passes through the micro-cavity structure 14. In other words, when the light signal reflected by the target object passes through the red display pixel R, if there is a red light signal in the light signal, the red light signal is reflected back, and the rest of the light signal passes through the red display pixel R and is received by the light sensing device 220, so that the light sensing device 220 in the light sensing unit 22 is disposed right below the red display pixel R, and the red light signal passing through the target object in the ambient light can be effectively filtered, thereby improving the sensing accuracy of the light sensing module 2.

In some embodiments, the light sensing device 220 is further disposed under the green display pixel G or the blue display pixel B. Correspondingly, the light sensing device 220 is provided with a filter 29, the filter is used for filtering light signals outside a preset waveband, and the setting of the preset waveband is different according to the different placement positions of the light sensing device 220. Specifically, if the light sensing device 220 is disposed below the green display pixel G, the red and blue light signals in the light signal reflected by the target object will pass through the green display pixel, and thus the disposed filter is used to filter the light signals other than the blue light signal, so that the light sensing device 220 only receives the blue light signal. Similarly, if the photo sensor 220 is disposed below the red display pixel R and the blue display pixel B, the filter 29 is used to filter light signals other than the green light signals, so that the photo sensor 220 only receives the green light signals.

In some embodiments, the light sensing panel 200 is used to perform biometric information sensing of a target object anywhere within the display area of the display panel. Specifically, for example, referring to fig. 12 and 18 in combination, the display panel 100 has a display area 105 and a non-display area 106, the display area 105 is defined by light emitting areas of all the display pixels 12 of the display panel 100, an area outside the display area 105 is the non-display area 106, and the non-display area 106 is used for setting circuits such as a display driving circuit for driving the display pixels 12 or a circuit bonding area for connecting a flexible circuit board. The photosensitive panel 200 has a sensing region 203 and a non-sensing region 204, the sensing region 203 is defined by the sensing regions of all the photosensitive units 22 of the photosensitive panel 200, the region outside the sensing region 203 is the non-sensing region 204, and the non-sensing region 204 is used for setting circuits such as the photosensitive driving circuit 23 for driving the photosensitive units 22 to perform the photosensitive process or a circuit bonding region for connecting a flexible circuit board. The shape of the sensing region 203 is consistent with the shape of the display region 105, and the size of the sensing region 203 is larger than or equal to the size of the display region 105, so that the photo-sensing panel 200 can sense the predetermined biometric information of the target object contacting or approaching any position of the display region 105 of the display panel 100. Further, the area of the photosensitive panel 200 is smaller 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, alternatively, in some embodiments, the area of the photosensitive panel 200 may be larger than that of the display panel 100.

In some embodiments, the sensing region 203 of the light sensing panel 200 may also be smaller than the display region 105 of the display panel 100, so as to realize sensing of the predetermined biometric information of the target object in a local region of the display region 105 of the display panel 100.

Further, the display device is further configured to perform touch sensing, and the display driving circuit drives the display pixels corresponding to the touch area to emit light after the display device detects a touch or proximity of a target object.

Further, referring to fig. 19 and 20, fig. 19 shows a structure of an electronic apparatus according to an embodiment of the present invention, fig. 20 shows a cross-sectional structure of the electronic apparatus shown in fig. 19 along the line I-I, and fig. 20 shows only a partial structure of the electronic apparatus. The electronic device is provided with the display module with any one of the implementation structures, and is used for displaying images of the electronic device and sensing biological characteristic information of a target object contacting or approaching the electronic device.

Examples of the electronic devices include, but are not limited to, consumer electronics, home electronics, vehicle-mounted electronics, financial terminal products, and other suitable types of electronic products. The consumer electronic products include mobile phones, tablet computers, notebook computers, desktop displays, all-in-one computers, and the like. The household electronic products are intelligent door locks, televisions, refrigerators, wearable equipment and the like. The vehicle-mounted electronic products are vehicle-mounted navigators, vehicle-mounted DVDs and the like. The financial terminal products are ATM machines, terminals for self-service business handling and the like. The electronic device shown in fig. 19 is a mobile terminal such as a mobile phone, but the display module can be applied to other suitable electronic products, and is not limited to the mobile terminal such as a mobile phone.

Specifically, the 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 ratio of the display panel 100 is high, for example, more than 80%. The screen occupation ratio refers to a ratio of the display area 105 of the display panel 100 to the front area of the mobile terminal 3. The light sensing panel 200 is correspondingly disposed below the display panel 100 for sensing predetermined biometric information of a target object contacting or approaching any position of the display area 105 of the display panel 100.

When the mobile terminal 3 is in a bright screen state and in the biometric information sensing mode, the display panel 100 emits a light signal. When an object touches or approaches the display area, the light sensing panel 200 receives the light signal reflected by the object, converts the received light signal into a corresponding electrical signal, and obtains predetermined biometric information of the object, for example, fingerprint image information, according to the electrical signal. Thus, the photo-sensing panel 200 can sense a target object contacting or approaching an arbitrary position of the display region 105.

The electronic device of the embodiment of the invention has the following advantages:

first, the light sensing panel in the light sensing module utilizes the optical signal that display panel sent to realize the biological characteristic information sensing of target object, need not additionally set up the light source to not only save electronic equipment's cost, but also realized obtaining the biological characteristic information of the target object of the display area optional position of contact or touch display panel. In addition, the photosensitive module in the display module can be independently manufactured and then assembled with a display device of the electronic equipment, so that the preparation of the electronic equipment is accelerated.

Secondly, in the embodiment of the invention, the light sensing panel is located below the display panel, and after the optical signal emitted by the display panel reaches the target object, the optical signal is reflected by the target object, and the reflected optical signal passes through the display panel and is sensed by the light sensing unit to form the biological characteristic information of the target object. Therefore, the problem of influencing the display of the electronic equipment is not considered, the arrangement of the photosensitive unit on the photosensitive panel is not limited, and the photosensitive device in the photosensitive unit can be made to be large enough, so that the sensing effect of the photosensitive module is improved.

Further, the electronic device further includes a touch sensor (not shown in the figure) for determining a touch area of a target object when the target object contacts the protective cover, so that the electronic device performs biometric information sensing in the touch area.

In some embodiments, the touch sensor is integrated with either the protective cover 300, the photo panel 200, or the display panel 100. Through the integrated touch sensor, not only is the touch detection of a target object realized, but also the thickness of the electronic equipment is reduced, and the development of the electronic equipment towards the direction of lightness and thinness is facilitated.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.

Claims

1. The utility model provides a sensitization module for sensing fingerprint information, its characterized in that, sensitization module includes:

the anti-aliasing imaging element comprises a plurality of first light-transmitting areas, a plurality of photosensitive units and a plurality of anti-aliasing imaging elements, wherein the first light-transmitting areas are used for light signals to pass through, the plurality of photosensitive units are correspondingly positioned below the plurality of first light-transmitting areas, and the anti-aliasing imaging element comprises a plurality of light-absorbing layers and a plurality of transparent supporting layers which are alternately stacked; the light absorption layer comprises a plurality of light absorption blocks arranged at intervals; the transparent supporting layer is formed by filling transparent materials and also fills the intervals among the light absorption blocks; wherein the region corresponding to the interval forms the first light-transmitting region;

the photosensitive module further comprises a filter film, the filter film is arranged between the anti-aliasing imaging element and the photosensitive panel, or the anti-aliasing imaging element is arranged between the filter film and the photosensitive panel, wherein the filter film is used for filtering optical signals outside a preset waveband;

the preset wave band is a wave band corresponding to blue or green light signals.

2. The photosensitive module of claim 1, wherein: the photosensitive unit is arranged opposite to the first light-transmitting area.

3. The photosensitive module of claim 1, wherein: the first light-transmitting area is used for allowing light signals vertical to the photosensitive panel to pass through.

4. The photosensitive module of claim 3, wherein: the optical signal perpendicular to the photosensitive panel includes an optical signal perpendicular to the photosensitive panel and an optical signal shifted from the vertical direction of the photosensitive panel within a predetermined angle range+20°。

5. The photosensitive module of claim 1, wherein: the anti-aliasing imaging element comprises a plurality of light absorbing layers and a plurality of transparent supporting layers, wherein the light absorbing layers and the transparent supporting layers are alternately stacked.

6. The photosensitive module of claim 5, wherein: the thicknesses of the transparent support layers are not equal.

7. The photosensitive module of claim 5, wherein: the thickness of the transparent supporting layer is increased layer by layer.

8. The photosensitive module of claim 1, wherein: the anti-aliasing imaging element is directly formed on the photosensitive panel, or the anti-aliasing imaging element is independently manufactured and then arranged on the photosensitive panel.

9. The photosensitive module of claim 1, wherein: one or more first light-transmitting areas are correspondingly arranged on each photosensitive unit.

10. The photosensitive module of claim 1, wherein: the photosensitive unit comprises at least one photosensitive device, and the photosensitive device is high in photosensitive sensitivity to blue light signals or green light signals.

11. The photosensitive module of claim 1, wherein: the photosensitive panel further comprises a substrate, and the plurality of photosensitive units are arranged on the substrate.

12. The photosensitive module of claim 11, wherein: the substrate is a silicon substrate, a metal substrate, a printed circuit board or an insulating substrate.

13. The photosensitive module of claim 11, wherein: the substrate is also provided with a scanning line group and a data line group which are electrically connected with the photosensitive unit, the photosensitive device further comprises a driving circuit connected with the scanning line group and a signal processing circuit connected with the data line group, and the driving circuit is used for providing scanning driving signals to the photosensitive unit through the scanning line group so as to drive the photosensitive unit to perform light sensing; the signal processing circuit is used for reading out the signals sensed by the photosensitive unit and acquiring fingerprint characteristic information of a target object contacting or approaching the upper part of the photosensitive panel according to the read-out signals.

14. The photosensitive module of claim 13, wherein: the drive circuit is arranged on the photosensitive panel or connected with the photosensitive panel through a connecting piece, and the signal processing circuit is connected with the photosensitive panel through a connecting piece.

15. The photosensitive module of claim 1, wherein: the light sensing unit of the light sensing panel is used for receiving the light signal returned by the target object through the first light transmission area and converting the light signal into a corresponding electric signal so as to sense fingerprint information.

16. A display module, comprising:

a display device including a display panel for performing image display; and

the photosensitive module is arranged below the display panel and used for sensing optical signals so as to acquire fingerprint characteristic information of a target object contacting or approaching the display module; the photosensitive module is as claimed in any one of claims 1 to 15.

17. The display module of claim 16, wherein: the display panel, the anti-aliasing imaging element and the photosensitive panel are arranged in a stacked mode.

18. The display module of claim 16, wherein: the display panel has a display area; the photosensitive panel is used for sensing fingerprint characteristic information of a target object at any position in a display area of the display panel; or the photosensitive panel is provided with a sensing area, the shape of the sensing area is consistent with that of the display area, and the size of the sensing area is larger than or equal to that of the display area.

19. The display module of claim 16, wherein: the display panel comprises a plurality of display pixels, and the display device further comprises a display driving circuit for driving the display pixels to emit light so as to be used as a light source for the photosensitive module to carry out light sensing.

20. The display module of claim 19, wherein: the display device is further used for performing touch sensing, and when the display device detects touch or proximity of a target object, the display driving circuit drives the display pixels of the corresponding touch area to emit light.

21. An electronic device, characterized in that: comprising a photo-sensing module according to any of the claims 1-15 or comprising a display module according to any of the claims 16-20.