CN109271057B - Display module and electronic device - Google Patents

Display module and electronic device Download PDF

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Publication number
CN109271057B
CN109271057B CN201810938042.8A CN201810938042A CN109271057B CN 109271057 B CN109271057 B CN 109271057B CN 201810938042 A CN201810938042 A CN 201810938042A CN 109271057 B CN109271057 B CN 109271057B
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light
display
display screen
layer
sensing
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CN109271057A (en
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张海平
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN201810938042.8A priority Critical patent/CN109271057B/en
Publication of CN109271057A publication Critical patent/CN109271057A/en
Priority to PCT/CN2019/094730 priority patent/WO2020034781A1/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Image Input (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The application provides a display assembly, which comprises a display screen, a light-gathering layer and a plurality of photosensitive units, wherein the display screen, the light-gathering layer and the photosensitive units are sequentially stacked; the display screen is provided with a plurality of pixels which are arranged in an array, a space is arranged between any two adjacent pixels, and the space comprises a first space; a plurality of micro through holes are formed in the light gathering layer; at least two of the micro-vias are aligned to the first space and to the same one of the light sensing units. The application also provides an electronic device comprising the display assembly. The scheme of this application can increase the screen of electronic equipment and account for than.

Description

Display module and electronic device
Technical Field
The application relates to the technical field of electronic products, in particular to a display assembly and electronic equipment.
Background
Electronic equipment's fingerprint module is established at the non-display area of screen usually, and the through-hole is seted up in the non-display area, and the fingerprint module exposes in order to supply the finger to press from the through-hole to discernment fingerprint. This design limits the screen fraction of the electronic device.
Content of application
The application provides a display assembly and an electronic device.
A display assembly comprises a display screen, a light-gathering layer and a plurality of photosensitive units which are sequentially stacked; the display screen is provided with a plurality of pixels which are arranged in an array, and intervals are arranged between any two adjacent pixels and comprise first intervals; a plurality of micro through holes are formed in the light-gathering layer; at least two micro-vias are aligned to the first space and to the same photo-sensing unit.
An electronic device includes a display assembly.
The utility model provides a scheme has set up spotlight layer and sensitization unit under the display screen, and when the pixel of display screen was luminous, the luminous interval that can pass between the pixel of pixel erupted the display screen. The light rays emitted out of the display screen are reflected after encountering objects to be identified, and the reflected light rays are emitted into the intervals among the pixels and pass through the micro through holes corresponding to the intervals to irradiate on the photosensitive units. The light sensing unit converts the received optical signal into an electrical signal carrying biometric information (including fingerprint information) of the object to be identified. Therefore, the scheme of the application can utilize the pixel area (namely the display area) of the display screen to realize biological feature acquisition and identification, so that the biological feature identification function is integrated in the display area of the display component, the display area can be increased compared with the traditional display component, the non-display area can be relatively reduced, and the screen occupation ratio of the electronic equipment applying the display component is improved.
Drawings
To more clearly illustrate the structural features and effects of the present application, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a display module according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a distribution of pixel spacings in the display panel of FIG. 2 from a top view;
FIG. 4 is a schematic diagram of the fingerprint recognition of an object to be recognized;
FIG. 5 is a schematic diagram of another distribution of pixel spacings in the display screen of FIG. 2 from a top view;
FIG. 6 is a schematic cross-sectional view of another display module according to an embodiment of the present application;
FIG. 7 is a schematic cross-sectional view of another display module according to an embodiment of the present application;
FIG. 8 is a schematic cross-sectional view of another display module according to an embodiment of the present application;
fig. 9 is a schematic cross-sectional view of another display module according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments that can be derived by a person skilled in the art from the embodiments given herein without making any creative effort shall fall within the protection scope of the present application. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In addition, the following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be used to practice the present application. Directional phrases used in this application, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings and are, therefore, used herein for better and clearer illustration and understanding of the application and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the application.
The embodiment of the application provides an electronic device, which can be any device with communication, display and storage functions, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, a vehicle-mounted device, a network television, a wearable device, and the like.
The electronic device of the embodiment of the application can comprise a display assembly and a shell, wherein the display assembly comprises a display screen. As shown in fig. 1, a display 12 of an electronic device 10 is mounted on a housing 11. The display 12 may include a cover plate and a display panel bonded together by a bonding process, wherein the cover plate may only have a function of protecting the display panel, and the display panel has both a display function and a touch function; or the cover plate can have both the protection function and the display function, and the display panel is only used for displaying. In the embodiments of the present application, the display panel may be a self-luminous display panel, such as an OLED (Organic Light-Emitting Diode) panel, a plasma display panel, or an electronic ink display panel; the display panel may be a liquid crystal panel. Alternatively, the display 12 may be a reinforced display panel, which has a display surface with high mechanical properties (such as hardness and strength) and can withstand external impact, friction, pressure, damage, etc.
Fig. 2 shows a display module in the electronic device 10 of the first embodiment of the present application. As shown in fig. 2, the display assembly includes a display 12, a light-condensing layer 21, and a plurality of light-sensing units 22, wherein the display 12, the light-condensing layer 21, and the plurality of light-sensing units 22 are stacked in sequence. In the first embodiment, the display panel 12 is taken as an example of the self-luminous display panel 12 (i.e. the display panel 12 includes a cover plate and a self-luminous display panel which are attached to each other, or the display panel 12 is an enhanced self-luminous display panel).
As shown in fig. 2 and 3, in the first embodiment, the display panel 12 has a plurality of pixels 121 arranged in an array, and each pixel 121 is used for emitting light under driving to make the display panel 12 display various pictures. The pixels 121 in the display 12 may be arranged in a matrix or may be arranged in a specific pattern as desired. Any two adjacent pixels 121 have a space therebetween. Taking fig. 3 as an example, the interval exists not only between any two adjacent pixels 121 in the horizontal direction or the vertical direction but also between any two adjacent pixels 121 in the diagonal direction. During the manufacturing process of the display panel 12 (e.g., the manufacturing process of the display panel), a layer having a specific function (including, but not limited to, separating different pixels 121 to prevent crosstalk between pixels 121) may be formed in the space, and the layer is capable of transmitting light (i.e., the space is capable of transmitting light). As shown in fig. 3, the intervals may include a first interval 122, the number of the first intervals 122 may be at least one, and design features of the first interval 122 will be described further below.
As shown in fig. 2 and 3, the light-condensing layer 21 is provided with a plurality of micro through holes 211, and the number of the micro through holes 211 is related to the collection of the biological characteristic information, so that the collection of the biological characteristic information can be accurately performed. The hole axis of the micro-via hole 211 is a straight line and substantially coincides with the thickness direction of the display screen 12. The aperture of the micro-through holes 211 is smaller than the size of the interval, and the aperture value of the micro-through holes 211 reaches the micron level. The shape of the micro-via 211 may be designed as desired, including but not limited to a square hole, a round hole, etc. At least two of such micro-vias 211 are present among all the micro-vias 211 on the light-condensing layer 21: the at least two micro-vias 211 have one end opening aligned with the first spacer 122 and the opposite other end opening aligned with the same photo-sensing unit 22. In the first embodiment, the meaning of the opening alignment interval of the micro via holes 211 is: the orthographic projection of the opening of the micro-via 211 on the display screen 12 falls within the interval (i.e. the orthographic projection of the micro-via 211 on the display screen 12 falls within the interval); the meaning of the alignment of the opening of the micro-via 211 to the photosensitive unit 22 is: the orthographic projection of the opening of the micro-via 211 on the photosensitive unit 22 falls within the photosensitive surface of the photosensitive unit 22 (i.e., the orthographic projection of the micro-via 211 on the photosensitive unit 22 falls within the photosensitive surface of the photosensitive unit 22).
In the first embodiment, the micro-via 211 is used for light to pass through. For the first spacer 122, at least two micro vias 211 are aligned with the first spacer 122, that is, the first spacer 122 covers at least two micro vias 211, so that the light transmitted through the first spacer 122 can pass through the at least two micro vias 211 and irradiate on the same light sensing unit 22. Each of the spaces on the display 12 may be the first space 122, or may include other spaces besides the first space 122, and the other spaces may not align the micro-through holes 211 with the photosensitive units 22, that is, light transmitted in the other spaces cannot irradiate the photosensitive units 22 through the micro-through holes 211; or the other space may be aligned with only one micro-through hole 211 and the photosensitive unit 22, so that the light passing through the other space can also pass through the micro-through hole 211 and irradiate the photosensitive unit 22.
In the first embodiment, the light sensing unit 22 is used for sensing light (i.e. performing photoelectric conversion) to generate a sensing signal. The number of the light sensing units 22 is related to the collection of the biometric information, and is set based on the fact that the collection of the biometric information can be accurately performed. The light-sensing units 22 are spaced apart, and one light-sensing unit 22 is aligned with a plurality (e.g., at least one, or at least two) of the micro-vias 211 to receive light from the micro-vias 211. Each of the light sensing units 22 may be packaged to form a relatively independent functional unit. Each of the photosensitive units 22 may be disposed on a substrate 23, the substrate 23 is located on a side of the light-condensing layer 21 away from the display 12, and each of the photosensitive units 22 is specifically formed on a side of the substrate 23 facing the light-condensing layer 21. The substrate 23 serves as a carrier substrate for the light sensing units 22, and also has conductive properties, enabling electrical signal interaction with each light sensing unit 22. Of course, the design substrate 23 is not limited thereto, and the photosensitive units 22 may be carried and electrically connected by other structures.
In the first embodiment, the light-condensing layer 21 and the light-sensing units 22 may be distributed in all display areas of the display 12, and all display areas of the display 12 may sense light; the light-gathering layer 21 and the light-sensing units 22 may also be distributed only in a portion of the display area of the display 12, and only a portion of the display area of the display 12 may sense light.
The electronic device 10 in the first embodiment can utilize the display component to collect the biometric information (including but not limited to fingerprint information, palm print information, facial feature information, iris image information, etc.) of the object to be identified (the object to be identified), identify the biometric information, and complete the identity authentication of the object to be identified. The following describes the process of acquiring biometric information in detail, taking the object to be identified as a person and the biometric information as fingerprint information as an example.
As shown in fig. 4, the display panel 12 emits light when displaying a screen. When a finger approaches the display screen 12 (the finger may be attached to the display screen 12, or the distance from the finger to the display screen 12 is less than or equal to the sensing distance), the light emitted from the display screen 12 irradiates the finger to form a reflected light, and the reflected light enters the display screen 12 and is transmitted into the space of the pixels 121. Wherein the reflected light entering the first space 122 will pass through the micro-vias 211 aligned with the first space 122 (all of the micro-vias 211 aligned with the first space 122, or several micro-vias 211 of all of the micro-vias 211 aligned with the first space 122) and irradiate onto the photosensitive unit 22.
In the light transmission process, the pixels 121 of the display panel 12 are spaced apart to serve as a transmission medium for the reflected light. The design of the light-condensing layer 21 and the light-sensing unit 22 realizes reflected light imaging by using the principle similar to 'pinhole imaging'. The micro-through holes 211 on the light-gathering layer 21 are similar to the small holes in the "small hole imaging" principle, and the light-sensing unit 22 is similar to the imaging screen in the "small hole imaging" principle. The reflected light passes through the micro-via 211 and is collected on the light sensing unit 22, and the light sensing unit 22 senses the light to generate a sensing signal, and the sensing signal carries the fingerprint information (i.e., fingerprint image) of the finger, thereby completing the collection of the fingerprint information.
In the first embodiment, the electronic device 10 may include a memory pre-stored with target fingerprint information (original fingerprint information input by the user) and a processor for comparing the fingerprint information carried in the sensing signal with the target fingerprint information to identify the fingerprint information. If the fingerprint information matches the target fingerprint information, the processor may drive the display 12 to display a corresponding first image (e.g., an unlock image, a payment success image, etc.) through the identity authentication of the object to be recognized; if not, the identity authentication of the object to be identified fails, and at this time, the processor may drive the display screen 12 to display a corresponding second screen (e.g., an unlocking failure prompt screen, a payment failure prompt screen, etc.).
As above, the light sensing unit 22 may also collect biometric information other than fingerprint information. Accordingly, the memory may be pre-stored with target characteristic information (e.g., input original palm print information, original facial characteristic information, original iris image information, etc.) in addition to the target fingerprint information; the processor is configured to compare the biometric information carried in the sensing signal with the target feature information to identify the biometric information, and drive the display 12 to display different images when the identity authentication of the object to be identified passes or fails.
In the first embodiment, when all the display areas of the display screen 12 can sense light (i.e., the light-gathering layer 21 and the light-sensing units 22 are distributed in all the display areas of the display screen 12), all the display areas of the display screen 12 can be used as biometric identification areas, so that the object to be identified can perform biometric identification in any area of the display areas; when only a part of the display area of the display 12 can sense light (i.e. the light-gathering layer 21 and the light-sensing units 22 are distributed only on a part of the display area of the display 12), only a part of the display area of the display 12 can be used as a biometric identification area, so that the object to be identified can perform biometric identification on a part of the display area. For the latter scheme, a prompt can be sent to the object to be recognized, so that the object to be recognized can clearly recognize the biological feature recognition area. For example, a prompt screen may be displayed in the display area to prompt the object to be recognized to perform biometric recognition in the area; alternatively, a specific area in the display area may be fixedly set as the biometric identification area (e.g., one-half or one-third of the display area is defined as the biometric identification area), and the object to be identified may be notified in the product description of the electronic device 10.
In addition, the solution of the first embodiment can also improve the moire fringe defect and the fixed noise defect of the fingerprint image. Specifically, referring to fig. 4, the light-condensing layer 21 and the display 12 may be produced and assembled (it should be understood that the assembling deviation is controlled within a certain range), so that the light-condensing layer 21 is misaligned with the first space 122. At this time, among the micro vias 211 originally aligned with the first spacers 122, there may be several micro vias 211 that are not aligned with the first spacers 122. But since the first space 122 covers at least two micro-vias 211, there is a possibility that at least one micro-via 211 remains aligned with the first space 122. In an actual product, the aperture of the micro-through holes 211 is much smaller than the size of the first space 122, even if the light-gathering layer 21 is misaligned with the first space 122, the number of the micro-through holes 211 aligned with the first space 122 is large, and the micro-through holes 211 aligned with the first space 122 are aligned with the same light-sensing unit 22, so that the light-sensing unit 22 can sense the light transmitted by the micro-through holes 211. Therefore, the light sensing units 22 corresponding to the first interval 122 can sense light normally when dislocation occurs, so that the processed fingerprint image is clear and accurate, and moire fringes and fixed image noise cannot occur. On the contrary, if the gap is only aligned to one micro through hole 211 and the micro through hole 211 is aligned to one photosensitive unit 22, when the gap is dislocated with the micro through hole 211, the clear imaging condition of 'pinhole imaging' cannot be met, so that the photosensitive unit 22 cannot sense light normally, and moire fringes and fixed image noise can appear in the processed fingerprint image.
In summary, the solution of the first embodiment can achieve the biometric feature collection and identification by using the pixel 121 area (i.e. the display area) of the display 12, so as to integrate the biometric feature identification function in the display area of the electronic device 10. Compared with the conventional electronic device 10, the scheme of the first embodiment can expand the display area and relatively reduce the non-display area, thereby increasing the screen occupation ratio of the electronic device 10. Moreover, since the biometric feature is collected under the display 12, no holes need to be formed in the display 12, thereby ensuring the structural strength of the display 12 and the appearance integrity of the electronic device 10. In addition, the solution of the first embodiment can also improve or even eliminate the moire fringe defect and the fixed noise defect.
As shown in fig. 2, fig. 3 and fig. 5, in the first embodiment, further, the interval of the pixel 121 may further include a second interval 123, and the number of the second interval 123 is at least one. The second spacers 123 may be aligned with at least one of the micro-vias 211, and the micro-vias 211 aligned with the second spacers 123 are aligned with the same photosensitive unit 22. The second interval 123 is also used for transmitting the reflected light, and the light sensing unit 22 corresponding to the second interval 123 is also used for sensing the reflected light to generate a sensing signal. As described above, when the second space 123 is aligned with only one micro through hole 211 (as shown in fig. 2 and 3), if the light-condensing layer 21 is misaligned with the second space 123, moire fringes and fixed image noise may appear in the biometric image at the second space 123, but the second space 123 may still be used for imaging. The biometric image formed at the first interval 122 can still ensure the quality, so the solution of the first embodiment still improves the moire fringe defect and the fixed noise defect as a whole. When the second space 123 is aligned with at least two micro vias 211 (as shown in fig. 5), the second space 123 is equal to the first space 122, and both the second space 123 and the first space 122 cover at least two micro vias 211. Therefore, when the light-condensing layer 21 is misaligned with the display 12, the fingerprint images formed at the first interval 122 and the second interval 123 can eliminate moire fringes and fixed noise defects.
In the first embodiment, further, any one of the intervals between the pixels 121 of the display 12 is aligned with at least two of the micro-vias 211, and all of the micro-vias 211 aligned with the same interval are aligned with the same light-sensing unit 22. That is, all the intervals are the first intervals 122, and all the display areas of the display screen 12 can be used as the biometric identification areas. Therefore, not only the Moire fringe problem and the fixed noise problem are optimized and even eliminated, but also full-screen biological feature recognition can be realized.
As shown in fig. 2 and 4, in the first embodiment, the light sensing unit 22 has a light sensing surface (i.e., a surface for receiving light). Preferably, the orthographic projection of the space corresponding to the light-sensing unit 22 on the light-sensing surface falls within the light-sensing surface. Therefore, the photosensitive unit 22 has a larger photosensitive area, and can realize the biological characteristic image acquisition with a larger visual field range. Of course, the present invention is not limited to this, as long as the light sensing unit 22 can sense the light transmitted to the sensing surface through the gap.
In the first embodiment, further, the distance from the light-condensing layer 21 to the display screen 12 can be adjusted. The intrinsic mechanism is that the adjustment of the distance from the light-gathering layer 21 to the display screen 12 is equivalent to the adjustment of the object distance, so that the imaging field of view, the imaging size, the imaging definition and the like can be correspondingly adjusted, thereby adapting to different recognition scenes (such as different objects to be recognized, different illumination environments in which the objects to be recognized are located, and the like). The adjustment structure may be designed to adjust the distance from the light-condensing layer 21 to the display 12. Of course, the distance from the light-condensing layer 21 to the display 12 may also be a fixed value.
In the first embodiment, the quality of the biometric image collected by the photosensitive unit 22 can be improved by further optical design.
Specifically, as shown in fig. 6, in the first embodiment, a first optical layer 24 may be disposed between the display 12 and the plurality of photosensitive units 22, and the first optical layer 24 and the light-condensing layer 21 are stacked. The first optical layer 24 is used to filter out certain wavelength bands of invisible light, including but not limited to infrared light. In fig. 5, the first optical layer 24 is specifically disposed between the display 12 and the light-condensing layer 21, but the first optical layer 24 may also be disposed between the light-condensing layer 21 and the plurality of light-sensing units 22; or the first optical layer 24 may be disposed between the display 12 and the light-condensing layer 21, and between the light-condensing layer 21 and the plurality of light-sensing units 22. The first optical layer 24 may cover all of the micro-through holes 211 on the light-gathering layer 21 (this covering is applicable to the first optical layer 24 being located above, below, or both above and below the light-gathering layer 21). The first optical layer 24 is arranged in a manner that when an object to be recognized is attached to the display screen 12 to perform biometric recognition (fingerprint recognition or palm print recognition), visible light in ambient light cannot penetrate through a finger or a palm of the object to be recognized, but invisible light in certain specific wave bands can penetrate through the finger or the palm of the object to be recognized, pass through the gap and the through hole, irradiate on the photosensitive unit 22 and be sensed, and the invisible light can interfere with the sensing of the photosensitive unit 22 on light emission of the display screen 12, so that the quality of a biometric image is affected. After the first optical layer 24 is added, the first optical layer 24 filters invisible light in ambient light, so that interference of the invisible light is eliminated, and the quality of the biometric image is ensured.
Further, as shown in fig. 6, a surface of the first optical layer 24 facing toward or away from the display screen 12 may be coated with a first coating film, and the first coating film may cover the entire surface of the first optical layer 24 facing toward or away from the display screen 12. The first coating film includes a plurality of coating units 241 arranged at intervals, and the first coating film is used for collimating the light emitted through the first optical layer 24. Therefore, by the collimation effect of the first coating film, the original light rays which are relatively divergent are trimmed into parallel lines, which is favorable for gathering the light rays onto the photosensitive unit 22, and is favorable for improving the imaging quality.
As shown in fig. 7, in the second embodiment, a second optical layer 25 may be disposed between the display 12 and the plurality of photosensitive units 22, and the second optical layer 25 and the light-condensing layer 21 are stacked. The second optical layer 25 has a function similar to that of the first coating film for collimating light emitted through the second optical layer 25. However, unlike the first coating, the second optical layer 25 is a continuous layer that is made using a different manufacturing process than the first coating. In fig. 6, the second optical layer 25 is specifically disposed between the display 12 and the light-condensing layer 21, but the second optical layer 25 may also be disposed between the light-condensing layer 21 and the plurality of light-sensing units 22. The second optical layer 25 may cover all of the micro-vias 211 on the light-concentrating layer 21 (this covering applies both to the case where the second optical layer 25 is located above or below the light-concentrating layer 21). By the collimation of the second optical layer 25, the originally more divergent light rays are trimmed into parallel lines, which is beneficial to gathering the light rays onto the photosensitive unit 22, thereby being beneficial to improving the imaging quality.
Further, as shown in fig. 6, a surface of the second optical layer 25 facing toward or away from the display screen 12 may be coated with a second coating film, and the second coating film may cover the entire surface of the second optical layer 25 facing toward or away from the display screen 12. The second coating film includes a plurality of coating units 251 arranged at intervals, and the second coating film is used to collimate the light emitted through the second optical layer 25. Therefore, the effect of collimated light can be strengthened by additionally arranging the second coating film, light can be gathered on the photosensitive unit 22 more conveniently, and the imaging quality is further improved.
In other embodiments of the first embodiment, the first optical layer 24, the first plating film, the second optical layer 25, and the second plating film may be combined and selected as needed, so long as the optical components (including the optical layer and the plating film) to be combined and selected are located between the display 12 and the light-sensing unit 22, and are not limited to the types of optical components and the relative positions between the optical components used in the first and second embodiments. For example, as shown in fig. 8, a first optical layer 24 may be disposed on both sides of the light-condensing layer 21 facing toward and away from the display screen 12, and a second optical layer 25 may be disposed between the first optical layer 24 and the display screen 12, so as to both filter out harmful invisible light and collimate light.
In the first embodiment, further, the display module may further include an invisible light source, and the invisible light source is disposed below the display screen 12. The invisible light source is used for emitting invisible light rays, including but not limited to infrared light rays. The invisible light source is additionally arranged, so that biological feature acquisition and identification can be realized in a screen-off scene. Specifically, the processor is further configured to control the invisible light source to emit invisible light when the display screen 12 is in the off state, where the invisible light passes through the interval between the pixels 121 and is emitted from a set area (the set area is the biometric identification area) of the display screen 12, where the set area may be a partial display area or a whole display area of the display screen 12. Invisible light rays are reflected after encountering an object to be identified after being emitted out of the display screen 12, and the reflected light rays are emitted into the display screen 12 and pass through the intervals among the pixels 121 and the micro through holes 211 to irradiate on the photosensitive unit 22. The photosensitive unit 22 can sense the invisible light to generate a sensing signal, the sensing signal carries the biometric information, and the processor processes the biometric information, so as to complete the collection and identification of the biometric characteristic. The prompt can be sent to the object to be identified, so that the set area can be clearly identified. For example, a specific area in the display area may be used as a setting area (e.g., one-half, one-third, or all of the display area is defined as the setting area), and the specific position of the setting area of the object to be recognized may be informed in the product description of the electronic device 10. Therefore, by adopting the invisible light source, the biological characteristics can be collected and identified when the screen is turned off, so that the functions of the electronic equipment 10 are expanded, and the user experience of the electronic equipment 10 is improved. It should be appreciated that the first optical layer 24 may no longer be provided when illuminating the finger with invisible light to avoid filtering out the invisible light for imaging.
Alternatively, in order to realize the biometric feature collection and identification in the screen-off scene, the first embodiment may also use the light emission of the display screen 12 itself without providing an invisible light source. Specifically, when the distance between the object to be recognized and the display 12 in the off-screen state reaches the sensing distance (the maximum distance at which the light sensing unit 22 can clearly image), the processor controls the pixels 121 in the set area of the display 12 to emit light to illuminate the object to be recognized, so that the light sensing unit 22 in the set area senses the light reflected by the object to be recognized. When the setting area is a partial display area, the setting area can display a prompt image (such as a pattern simulating a fingerprint) to prompt the object to be identified to carry out biological feature identification in the setting area; when the setting area is the whole display area, the object to be recognized can perform biometric recognition in any area of the display area. Preferably, the electronic device 10 may further comprise a detection module for detecting a distance of the object to be identified from the display screen 12 and sending a feedback signal indicating the distance to the processor. The processor judges whether the distance reaches the sensing distance according to the feedback signal. When the distance reaches the sensing distance, the processor drives the pixels 121 in the set area of the display screen 12 to emit light to prompt the object to be recognized to perform biometric recognition.
In the first embodiment, the display module may further include a control circuit, and the control circuit is configured to drive the display screen 12 to display. Preferably, the control circuit can also control a plurality of light sensing units 22 to sense light. Thus, the display 12 and the light sensing unit 22 can be multiplexed with the same control circuit, and the circuit design can be simplified. Of course, the display 12 and the light sensing unit 22 may have their own control circuits.
In the above first embodiment, the display 12 is a self-luminous display 12. As shown in fig. 9, in the second embodiment of the present application, unlike the first embodiment, the display screen of the display assembly 30 is a liquid crystal display screen, that is, the display screen includes a liquid crystal panel 31 and a backlight module 32. The liquid crystal panel 31 has a plurality of pixels 311 arranged in an array, and a space 312 is provided between adjacent pixels 311. The backlight module 32 is used for providing backlight to the liquid crystal panel 31. The backlight module 32 may include a frame 322 and an optical component 321, the optical component 321 is accommodated in the frame 322, the optical component 321 is a component related to generating backlight, and the optical component 321 includes various optical films (such as an antireflection film, a filter, a reflective sheet, etc.), a light guide plate, a light source, etc. The frame 322 is made of opaque material (e.g. metal and/or plastic), a plurality of first light holes 322a are formed on the frame 322, and one first light hole 322a is aligned with one of the spacers 321. The light-condensing layer 21 is disposed on a side of the frame body 322 away from the liquid crystal panel 31.
The principle of biometric identification performed by the solution of the second embodiment is basically the same as that of the first embodiment described above, except that: after the light emitted from the display screen is reflected by the object to be identified, the reflected light passes through the space 312 of the pixel 311, further passes through the optical component 321 (mainly the optical film and the light guide plate) in the backlight module 32 and the first light hole 322a on the carrying frame 322, then passes through the micro-through hole 211, and finally is sensed by the light sensing unit 22. In order to transmit light more effectively, the optical component 321 in the backlight module 32 can be specially designed (including but not limited to using new materials), so that it can not only facilitate the generation of backlight, but also emit light through the display screen. For example, the light guide plate may have a plurality of light-transmitting regions (still filled with material, not through holes), one light-transmitting region being aligned with one first light-transmitting hole 322a, so that light passing through the first light-transmitting hole 322a passes through the light-transmitting region and irradiates into the light-condensing layer 21. The light-transmitting region has high light transmittance, and thus allows reflected light to pass therethrough. The light transmitting region may be formed through a polishing process.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (18)

1. A display module, characterized in that,
the display screen comprises a display screen, a light-gathering layer, a first optical layer, a first coating and a plurality of photosensitive units which are sequentially stacked; the display screen is provided with a plurality of pixels which are arranged in an array, a space is arranged between any two adjacent pixels, and the space comprises a first space; the display screen comprises a display screen body, a plurality of light sensing units, a first optical layer, a light gathering layer and a plurality of coating units, wherein the display screen body is provided with a plurality of light sensing units, the first optical layer is arranged between the display screen body and the plurality of light sensing units, the light gathering layer is arranged on the display screen body in a stacked mode, the first optical layer is used for filtering infrared light, a first coating film is coated on the surface of the display screen towards or away from the first optical layer, the first coating film comprises the plurality of coating units which are arranged at intervals, the first coating film is used for enabling light rays emitted from the first optical layer to be collimated, a plurality of micro through holes are formed in the light gathering layer, and at.
2. The display assembly of claim 1,
the interval also comprises a second interval, and at least one micro through hole is aligned with the second interval and is aligned with the same photosensitive unit.
3. The display assembly of claim 1,
any one of the spaces is aligned with at least two of the micro-through holes, and all the micro-through holes aligned with the same space are aligned with the same photosensitive unit.
4. The display assembly of any of claims 1-3,
the photosensitive unit is provided with a photosensitive surface, and the orthographic projection of the interval corresponding to the photosensitive unit on the photosensitive surface is in the photosensitive surface.
5. The display assembly of any of claims 1-3,
and a second optical layer is arranged between the display screen and the plurality of photosensitive units, the second optical layer and the light-gathering layer are stacked, and the second optical layer is used for collimating the light rays emitted through the second optical layer.
6. The display assembly of claim 5,
the surface of the second optical layer facing or departing from the display screen is plated with a second coating film, the second coating film comprises a plurality of coating film units which are arranged at intervals, and the second coating film is used for collimating light rays emitted through the second optical layer.
7. The display assembly of any of claims 1-3,
the display screen includes a self-luminous display panel having a plurality of the pixels arranged in an array.
8. The display assembly of any of claims 1-3,
the display screen comprises a liquid crystal panel and a backlight module; the liquid crystal panel is provided with a plurality of pixels arranged in an array; the backlight module comprises a bearing frame body and an optical component, wherein the optical component is accommodated in the bearing frame body, the bearing frame body is provided with a plurality of first light holes, and one first light hole is aligned with one interval; the light condensing layer is arranged on one side of the bearing frame body, which deviates from the liquid crystal panel.
9. The display assembly of claim 8,
the optical member includes a light guide plate having a plurality of light transmissive regions, one of the light transmissive regions being aligned with one of the first light transmissive holes so that light passing through the first light transmissive hole passes through the light transmissive region to be irradiated into the light condensing layer.
10. The display assembly of any of claims 1-3,
the display assembly further comprises an invisible light source, the invisible light source is used for emitting invisible light rays, and the invisible light rays penetrate through the plurality of intervals and are emitted out of the set area of the display screen.
11. The display assembly of any of claims 1-3,
the display assembly further comprises a control circuit, and the control circuit is used for driving the display screen to display and controlling the plurality of photosensitive units to sense light.
12. The display assembly of any of claims 1-3,
the display module further comprises a substrate, the substrate is located on one side, away from the display screen, of the light-gathering layer, and the plurality of light-sensing units are formed on the substrate and face towards one side of the light-gathering layer.
13. An electronic device, characterized in that,
comprising a display assembly according to any of claims 1-12.
14. The electronic device of claim 13,
the light sensing unit is used for generating a sensing signal when sensing light rays, and the sensing signal carries biological characteristic information of an object to be identified; the electronic equipment further comprises a processor, wherein the processor is used for comparing the biological characteristic information carried in the sensing signal with target characteristic information and driving the display screen to display a corresponding picture when the biological characteristic information is matched with the target characteristic information.
15. The electronic device of claim 14,
when the distance between the object to be identified and the display screen in the screen-off state reaches the sensing distance, the processor is used for controlling the pixels in the set area of the display screen to emit light to illuminate the object to be identified, so that the light reflected by the object to be identified is sensed by the photosensitive units in the set area.
16. The electronic device of claim 15,
the electronic equipment further comprises a detection module, wherein the detection module is used for detecting the distance between the object to be identified and the display screen and sending a feedback signal indicating the distance to the processor; the processor is used for judging whether the distance between the object to be identified and the display screen reaches the sensing distance or not according to the feedback signal.
17. The electronic device of claim 15,
the setting area is the whole display area of the display screen.
18. The electronic device of claim 14,
the display assembly further comprises an invisible light source, the processor is further used for controlling the invisible light source to emit invisible light rays when the display screen is in a screen-off state, and the invisible light rays penetrate through the plurality of intervals and are emitted from a set area of the display screen; the light sensing unit is used for sensing the invisible light to generate the sensing signal.
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