CN211698981U - Electronic equipment - Google Patents

Abstract

The utility model is suitable for an optics and electron technical field provide an electronic equipment for carry out the sensing to an external object, it includes: a display device for displaying a picture; the supporting plate is arranged below the display device to support the display device, and a light-transmitting through hole is formed in the supporting plate; and the sensing module is arranged below the supporting plate, and the sensing module transmits and/or receives sensing light through the light-transmitting through hole and the display device so as to sense an external object.

Description

Electronic equipment

Technical Field

The utility model belongs to the technical field of optics, especially, relate to an electronic equipment.

Background

The existing electronic equipment often needs to set a functional module on a main viewing surface in order to realize multiple functions, for example: set up the fingerprint identification module in order to adopt the fingerprint identification function to open electronic equipment on its main face of looking. However, these functional modules are usually required to be separately disposed outside the display area of the electronic device, so as to occupy the display area of the electronic device, which affects the overall appearance of the main viewing surface of the electronic device.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic equipment is in order to solve above-mentioned technical problem.

An embodiment of the present invention provides an electronic device for sensing an external object, which includes:

a display device for displaying a picture;

the supporting plate is arranged below the display device to support the display device, and a light-transmitting through hole is formed in the supporting plate; and

the sensing module is arranged below the supporting plate and used for transmitting and/or receiving sensing light through the light-transmitting through hole and the display device so as to sense an external object.

In some embodiments, a region of the display device intersecting with a light path of the sensing module receiving the sensing light is defined as a sensing region, the external object contacts with the display device in the sensing region, and the sensing light is reflected by the external object and then received by the sensing module from the sensing region through the display device.

In some embodiments, the sensing light emitted by the sensing module passes through the light-transmitting through hole and irradiates a portion of the external object outside the sensing region after passing through the display device, enters the inside of the external object, propagates to the sensing region, and is emitted from a surface of the external object in contact with the sensing region, and then is received by the sensing module through the display device for sensing.

In some embodiments, the portion of the external object outside of the sensing region includes a portion of the external object that contacts the surface of the display device at the periphery of the sensing region and a portion of the external object outside of the sensing region that does not contact the surface of the display device

In some embodiments, the sensing light emitted by the sensing module passes through the light-transmitting through hole and the display device to illuminate the external object located on the sensing region, and illuminance of the sensing light formed on the surface of the external object on at least a partial region of the sensing region by the sensing light is non-uniformly distributed.

In some embodiments, the non-uniform distribution of the illuminance of the sensing light on the surface of the external object over at least a portion of the sensing region means that the difference of the illuminance is greater than 30% for every 7-10 microns of the surface of the external object.

In some embodiments, the ratio of the area of the sensing region with non-uniform illuminance distribution to the total area of the sensing region is equal to or greater than one third.

In some embodiments, the sensing module comprises one or more light-emitting elements, and the plurality of light-emitting elements simultaneously emit sensing light to the sensing area; or

The plurality of light emitting elements are divided into different combinations according to a preset rule, the light emitting elements belonging to the same combination emit sensing light to the sensing area at the same time, and the light emitting elements of different combinations respectively emit the sensing light to the sensing area at different time intervals.

In some embodiments, if the plurality of light emitting elements are symmetrically distributed about the center of the sensing region, the ratio of the overlapping area of the plurality of illumination regions correspondingly formed in the sensing region by the symmetrically distributed light emitting elements emitting the sensing light to the sensing region within the same time period to the total area of the sensing region is less than two thirds.

In some embodiments, the sensing module includes a pair of light emitting devices symmetrically distributed about a center of the sensing region, two illumination regions respectively formed in the sensing region by the pair of light emitting devices do not overlap with each other, and the pair of light emitting devices simultaneously emit the sensing light to the sensing region; or

The pair of light emitting elements respectively emit sensing light to the sensing area at different time intervals.

In some embodiments, the sensing module includes a pair of light emitting devices symmetrically distributed about a center of the sensing region, the pair of light emitting devices respectively form an illumination region covering the entire sensing region, and the pair of light emitting devices respectively emit the sensing light to the sensing region at different time intervals.

In some embodiments, the sensing light may be infrared or near infrared wavelength light, with a wavelength range of 750 nm to 1000 nm.

In some embodiments, the display device is a liquid crystal display device including a liquid crystal display panel and a backlight module.

In some embodiments, the sensing module further includes one or more receiving units, and the receiving units receive the sensing light reflected by the external object to sense the external object.

In some embodiments, the area of the sensing region is larger than the field angle range of a single receiving unit, and the plurality of receiving units respectively receive the returned sensing light within the sensing region for sensing.

The electronic equipment can transmit and/or receive the sensing module of the sensing light rays through being arranged below the display device so as to realize the original sensing function in the display area of the display device, the area of the display area of the electronic equipment is not required to be occupied, the screen occupation ratio of the electronic equipment is favorably improved, and the overall impression of the main viewing surface of the electronic equipment is improved.

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

Fig. 1 is a schematic front view of an electronic apparatus provided by an embodiment of the present invention, the electronic apparatus includes a sensing module located below a display device.

Fig. 2 is a schematic structural diagram of the display device and the sensing module in fig. 1.

Fig. 3 is a schematic diagram of the variation of the light emitting intensity of the light emitting element of the sensing module in fig. 2 with the light emitting angle.

Fig. 4 is a schematic diagram of illuminance distribution of the light emitting elements of the sensor module shown in fig. 2 in the overlapped irradiation area.

Fig. 5 is a schematic layout view of the light emitting elements according to an embodiment of the present invention.

Fig. 6 is a schematic view of the illuminance distribution of the light emitting device in the sensing region in fig. 5.

Fig. 7 is a schematic view of a light path of the sensing light of the light emitting element according to a modified embodiment of the present invention.

Fig. 8 is a schematic view of a light path of the sensing light of the light emitting element according to a modification of the present invention.

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 exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any order or number of technical features indicated. Thus, features defined as "first" and "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 limited otherwise.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship or combination of two or more elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, only 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 letters in the various examples, which are intended in order to facilitate and clarify the invention, and in no event is it intended that any particular relationship between the various embodiments and/or configurations discussed herein be so repeated. In addition, the various specific processes and materials provided in the following description of the present invention are only examples for implementing the technical solution of the present invention, but one of ordinary skill in the art should recognize that the technical solution of the present invention can also be implemented by other processes and/or other materials not described below.

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 may 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 aspects of the invention.

Referring to fig. 1 and fig. 2 together, an embodiment of the present invention provides an electronic device 1, for example: mobile phones, notebook computers, tablet computers, touch interactive screens, doors, vehicles, robots, automatic numerical control machines, and the like. The electronic device 1 includes a display device 10 and a sensing module 12 disposed below the display device 10. The electronic device 1 is configured to correspondingly execute a corresponding function according to a sensing result of the sensing module 12. The corresponding functions include but are not limited to unlocking, paying, starting a preset application program after identifying the identity of the user, or acquiring body function parameters such as heart rate and blood oxygen content of the user to judge any one or more combinations of the emotion and the health condition of the user.

The display device 10 includes a display panel 102 and a backlight module 104. The backlight module 104 is disposed below the display panel 102 and configured to provide backlight light to the display panel 102. The sensing module 12 is disposed below the backlight module 104. The sensing module 12 can emit and/or receive sensing light through the backlight module 104 and the display panel 102 of the display device 10. The sensing light emitted from the sensing module 12 irradiates an external object through the backlight module 104 and the display panel 102 for sensing. The external object may be located outside the electronic device 1 or in contact with the electronic device 1. The sensing light is returned through the external object and then received by the sensing module 12 through the display panel 102 and the backlight module 104 for sensing. Here, the sensing light returning from the finger may be the sensing light reflected from the surface of the finger with the fingerprint pattern, or the sensing light entering the inside of the finger and then being emitted from the surface of the finger with the fingerprint pattern through diffuse reflection and propagation to return.

In this embodiment, the sensing light returned via the external object may carry biometric information of the external object, such as: the external object is a finger of a user, and the biometric information is fingerprint information of the user. The sensing module 12 is, for example, a fingerprint recognition module, and can acquire fingerprint information for recognition by sensing reflected sensing light. The display device 10 is a liquid crystal display device, and the display panel 102 is a liquid crystal display panel.

It is understood that, in other modified embodiments, the sensing light may not carry the biometric information of the external object, and may be directly used for sensing the approach of the external object. For example: the sensing module 12 senses that the sensing light exceeding the preset threshold returns back, and then it is considered that an external object approaches the electronic device 1.

The display panel 102 includes a display surface for displaying light emission. A sensing region 105 is defined on the display surface. The external object is in contact with the display panel 102 in the sensing region 105 to emit or reflect sensing light for sensing. A small portion of space for routing is omitted from the display surface of the display panel 102, and substantially all areas are areas for displaying images, so that the display surface of the display panel 102 is the display area 101 of the electronic device 1, and the sensing region 105 is located in the display area 101. The sensing module 12 is disposed below the backlight module 104 and corresponding to the sensing region 105. The sensing module 12 includes a transmitting unit 122 and a receiving unit 124. The emitting unit 122 emits the sensing light to the external object through the display device 10. The receiving unit 124 receives the sensing light returned from the external object through the display device 10 for sensing. The sensing region 105 is defined as a region where the display surface of the display panel 102 intersects with the light path of the receiving unit 124 for receiving the sensing light. It is understood that the electronic device 1 may further comprise a cover plate (not shown). The cover plate is disposed on the display surface of the display panel 102, and protects the display panel 102. The external object may also be pressed against the cover plate at a location corresponding to the sensing region 105 of the display panel 102 for sensing. In this embodiment, the sensing light is used for sensing a fingerprint. The sensing light may be infrared or near infrared wavelength light, and the wavelength range is 750 nm (Nanometer) to 2000 nm.

The display device 10 further comprises a support plate 103. The supporting plate 103 is disposed below the backlight module 104, and is used for supporting the backlight module 104 and enhancing the overall strength of the backlight module 104. The support plate 103 may be a hard metal plate, such as: and (4) glue iron. The supporting plate 103 is provided with light-transmitting through holes 1030 corresponding to positions where sensing light is to be emitted and received.

The emission unit 122 includes one or more light emitting elements 120. The light emitting elements 120 are used for emitting sensing light to the sensing region 105 on the display device 10. The light emitting element 120 may be a Light Emitting Diode (LED). It is understood that in other modified embodiments, the light emitting element 120 may also be other types of light emitting sources, such as: an Organic Light Emitting Diode (OLED), a Vertical Cavity Surface Emitting Laser (VCSEL), a Laser Diode (LD), and any other suitable Light Emitting device.

The emitting unit 122 further comprises a support 121. The support member 121 is used for disposing the light emitting element 120 on a side surface of the support plate 103 opposite to the backlight module 104. The light emitting element 120 is disposed on the supporting plate 103 at a position where the light transmitting through hole 1030 is located through the supporting member 121, so that the sensing light emitted by the light emitting element 120 passes through the light transmitting through hole 1030 and then irradiates the external object through the display device 10. Specifically, the supporting member 121 is substantially a slot, and includes a bottom surface 1210, a sidewall 1211 extending along a periphery of the bottom surface 1210 in a vertical direction, and a flange 1212 extending from an edge of the other side opening of the sidewall 1211 opposite to the bottom surface 1210. The light emitting element 120 is disposed on the bottom surface 1210. The flange 1212 of the supporting member 121 is connected to the supporting plate 103 around the light-transmitting through hole 1030 to arrange the light emitting element 120 corresponding to the light-transmitting through hole 1030. The flange 1212 may be connected around the light-transmitting through-hole 1030 by gluing or riveting with a fastener.

The receiving unit 124 includes a lens 126 and an image sensor 127. The lens 126 images the sensing light returned via the external object in focus on the image sensor 127 for fingerprint sensing. The receiving unit 124 may further include a receiving substrate 128. The lens 126 and the image sensor 127 are disposed on the receiving substrate 128.

In this embodiment, the receiving unit 124 is used to receive an optical center of the sensing light, such as: the center of the imaging optical path of the lens 126 is aligned or substantially aligned with the center of the sensing region 105. The center of the light-transmissive through-hole 1030 is also aligned or substantially aligned with the center of the sensing region 105. It is understood that in other modified embodiments, the optical center of the receiving unit 124 and/or the center of the light-transmitting through hole 1030 may not be aligned with the center of the sensing region 105, and the receiving unit 124 and the light-transmitting through hole 1030 may be disposed at positions such that the receiving unit 124 can receive enough sensing light from the sensing region 105 that an external object returns to achieve the required sensing function. For example: the angular range of the field of view of the receiving unit 124 is large enough so that the optical center of the receiving unit 124 can receive the sensing light returning from the entire sensing region 105 even if not aligned with the center of the sensing region 105, or can receive the sensing light with non-uniform distribution of illuminance returning from at least one third of the sensing regions 105.

It is understood that in other modified embodiments, the receiving unit 124 may omit the lens 126, and use the pinhole imaging principle to directly image on the image sensor 127. Alternatively, the receiving unit 124 does not need to image when proximity sensing is performed, and the receiving unit 124 may use a Photodiode (PD) instead of the image sensor 127 for sensing.

It is understood that in other modified embodiments, the sensing module 12 may further include one or more receiving units 124. The area of the sensing region 105 is larger than the field angle range of the single receiving unit 124, and the plurality of receiving units 124 respectively receive the returned sensing light within the sensing region 105 for sensing.

Taking the example where the external object is a finger, the fingerprint on the finger comprises valleys and ridges. The illuminance of the sensing light on the finger surface in at least a partial area of the sensing region 105 is non-uniformly distributed, so that the illuminance of the sensing light respectively on the protruding ridges and the recessed valleys on the fingerprint is different, and the light intensity of the sensing light emitted or reflected back through the valleys and the ridges to be received by the receiving unit 124 is obviously different. The receiving unit 124 can form clear light and dark stripes with high contrast corresponding to the valleys and ridges on the fingerprint, which is beneficial to subsequent fingerprint comparison and identification. In order to form a relatively clear stripe pattern of valleys and ridges, the difference of the illuminance of the sensing light irradiating the positions of the valleys and the ridges is more than 30%. The spacing between adjacent valleys and ridges on the fingerprint is in the range of 7-10 microns. Thus, the non-uniform distribution of the light intensity of the sensing light on the finger surface in at least a partial area of the sensing region 105 means that the difference of the light intensity on the adjacent valleys and ridges of the finger surface is greater than 30%, i.e. the difference of the light intensity is greater than 30% in the range of 7-10 microns apart on average.

The receiving unit 124 needs to acquire enough clear fingerprint images in the sensing region 105 for effective identification, so that the proportion of the area of the sensing region 105 formed by the light emitting elements 120 with non-uniform illuminance on the sensing region 105 to the total area of the sensing region 105 needs to be equal to or greater than one third.

One or more light emitting elements 120 on the emission unit 122 can be lighted simultaneously to shine, also can divide one or more light emitting elements 120 therein into different combinations, and the light emitting element 120 who belongs to same combination simultaneously emits sensing light to the sensing area 105, and the light emitting element 120 of different combinations separately emits sensing light to the sensing area 105 at different periods of time, the utility model discloses do not do the restriction to this, only need emission unit 122 shine the area that forms illuminance inhomogeneous distribution on the sensing area 105 at every turn at least account for one third of the total area of sensing area 105 can. It is understood that, when a plurality of light emitting devices 120 simultaneously emit sensing light to illuminate the sensing region 105, the illumination intensity of the sensing light illuminating the sensing region 105 should be the sum of the illumination intensities of the plurality of light emitting devices 120 simultaneously illuminating the sensing region 105.

In the case that the light emitting elements 120 respectively irradiate in different time periods in different combinations, the receiving unit 124 may combine a plurality of images respectively formed by receiving the sensing light in corresponding different time periods into one image to extract feature points for comparison and identification. The receiving unit 124 may also extract feature points from a plurality of images formed by the light emitting device 120 by irradiating at different time intervals, respectively, for comparison and identification.

It is understood that, in other modified embodiments, the receiving unit 124 may also perform other processing on the received sensing light to finally realize the function of comparison and identification, which is not limited herein.

The light emitting elements 120 on the emission unit 122 may be asymmetrically distributed about the center of the sensing region 105. The light emitting elements 120 on the emission unit 122 may also be distributed symmetrically about the center of the sensing region 105, including but not limited to rotational symmetry and central symmetry.

As shown in fig. 3, the light emitting intensity of the sensing light emitted by the light emitting element 120 varies with the light emitting angle and has a predetermined light emitting angle, and the light emitted by the light emitting element 120 along the direction of the maximum light emitting intensity is defined as a principal light, and the light at the outermost boundary of the light emitting angle range is defined as a boundary light. In this embodiment, the light emitting element 120 is an LED light source that emits infrared or near-infrared light. The light emitting angle of the light emitting element 120 ranges from 100 degrees to 160 degrees. The light emitting element 120 emits light from the center in a vertical direction with the maximum light emitting intensity, and the light emitting intensity gradually decreases within the light emitting angle as the angle from the center direction increases. Therefore, the light emitted from the light emitting element 120 in the vertical direction from the center is the principal ray. The light ray having the light emission angle of 60 degrees from the vertical direction is a boundary light ray, and has the smallest light emission intensity. It is understood that in other modified embodiments, the light emitting intensity of the light emitting element 120 may have other different distribution forms. Alternatively, the light emitting intensity distribution of the emitted light can be changed into various forms according to actual requirements by disposing an optical element such as a lens at the light emitting surface of the light emitting element 120.

As can be seen from the light intensity distribution characteristics of the light emitting devices 120, as shown in fig. 4, the illuminance of the plurality of irradiation regions correspondingly formed when the plurality of light emitting devices 120 symmetrically distributed about the center of the sensing region 105 simultaneously emit the sensing light is also symmetrically distributed about the center of the sensing region 105, so that the overlapping portions of the plurality of irradiation regions correspondingly formed by the plurality of light emitting devices 120 symmetrically distributed about the center of the sensing region 105 in the sensing region 105 are complemented by the illuminance of each other symmetrically distributed about the center of the sensing region 105, so that the overall illuminance of the overlapping portions is uniform, and the illuminance of the non-overlapping portions of the plurality of irradiation regions in the sensing region 105 is gradually changed along with the irradiation angle of the corresponding light emitting devices 120. Therefore, when the plurality of light emitting devices 120 symmetrically distributed about the center of the sensing region 105 simultaneously emit the sensing light to the sensing region 105, the ratio of the overlapping area of the plurality of illumination regions correspondingly formed in the sensing region 105 to the total area of the sensing region 105 should be less than two-thirds, so as to satisfy the requirement that the ratio of the area of the region with non-uniform illuminance distribution formed on the sensing region 105 by the light emitting devices 120 to the total area of the sensing region 105 is equal to or more than one third.

The plurality of light emitting elements 120 may be divided into different combinations according to a preset rule. For example: the light emitting elements 120 symmetrically distributed about the center of the sensing region 105 are divided by the distance from the center of the sensing region 105, and the light emitting elements 120 having the same distance from the center of the sensing region 105 are divided into the same combination. During sensing, the light emitting elements 120 belonging to the same combination are simultaneously turned on to emit sensing light to the sensing region 105, and the light emitting elements 120 belonging to different combinations are respectively turned on at different time intervals to emit sensing light to the sensing region 105. It is understood that the light emitting devices 120 of different combinations can emit the sensing light to the sensing region 105 at the same time on the premise that the non-uniform distribution area of the illuminance formed in the sensing region 105 by each illumination occupies at least one third of the total area of the sensing region 105. It is understood that, in other modified embodiments, the light emitting elements 120 may be divided into groups according to other principles, which is not limited by the present invention.

In this embodiment, referring to fig. 2, 5 and 6, the emitting unit 122 includes a pair of light emitting devices 120 symmetrically distributed about the center of the sensing region 105. The two illumination areas formed by the pair of light emitting elements 120 symmetrically distributed about the center of the sensing region 105 through the corresponding light transmitting through holes 1030 on the supporting plate 103 in the sensing region 105 respectively do not overlap with each other, and the two illumination areas may be separated by a predetermined distance or have their boundaries tangent to each other. Since the illuminance of the light emitting devices 120 in the respective illumination areas is non-uniformly distributed along with the gradual change of the illumination angle, the pair of light emitting devices 120 symmetrically distributed about the center of the sensing region 105 can simultaneously emit sensing light to the sensing region 105. It is understood that the pair of light emitting elements 120 can also emit sensing light to the sensing region 105 at different periods of time. Correspondingly, the receiving unit 124 receives the sensing light returned back by the external object for sensing at different corresponding time periods.

In another modified embodiment, as shown in fig. 7, the pair of light emitting elements 120 symmetrically distributed about the center of the sensing region 105 respectively form an irradiation region covering the entire sensing region 105 through the corresponding light transmitting through holes 1030 on the supporting plate 103. Therefore, the pair of light emitting elements 120 respectively emit sensing light to the sensing region 105 at different periods. The figures use different line shapes to schematically represent the sensing light emitted in different time periods, such as: the sensing light emitted from the light emitting element 120 positioned on the left side is indicated by a dotted line, and the sensing light emitted from the light emitting element 120 positioned on the right side is indicated by a solid line. Correspondingly, the receiving unit 124 receives the sensing light returned back by the external object at corresponding different time periods for sensing.

In other modified embodiments, as shown in fig. 8, the sensing light emitted by the one or more light emitting elements 120 passes through the corresponding light-transmitting through holes 1030 on the supporting plate 103 and then irradiates an external object, such as: a finger, a portion outside the sensing region 105, for example: the finger is located at a position where the periphery of the sensing region 105 is in contact with the display surface, or the finger is located at a position outside the sensing region 105 and not in contact with the display surface. The sensing light enters the interior of the external object from a portion of the external object outside the sensing region 105, then propagates inside the external object toward the sensing region 105, and exits at a surface of the external object contacting the sensing region 105, and then is received by the receiving unit 124 through the display device 10 for sensing.

When the sensing light is emitted from the surface of the external object, the concave-convex texture on the surface of the external object is in different contact conditions with the surface of the sensing region 105 to form a corresponding texture image. For example, for the case of the external object being a finger, the convex ridge in the fingerprint directly contacts the surface of the sensing region 105, so that the sensing light emitted from the ridge of the fingerprint directly enters the display device 10 to form a bright pattern with a large transmitted light flux. The concave valleys in the fingerprint have a gap with the surface of the sensing region 105, so that the light flux of the sensing light emitted from the valleys through the display device 10 is reduced, and a dark path with less light flux is formed. Therefore, when the sensing light is emitted from the inside of the finger and then passes through the display device 10, a light and dark stripe image corresponding to the fingerprint stripe is formed. The receiving unit 124 receives the sensing light from the inside of the finger through the surface of the finger in contact with the sensing region 105 to form the fingerprint pattern image for fingerprint identification sensing. Since different light paths are used for emitting and receiving the sensing light respectively, stray light reflected by the sensing light when the sensing light passes through each layer of the display device 10 during emission is not received by the receiving unit 124 to affect sensing, and sensing accuracy is improved.

It is understood that in other modified embodiments, the sensing light emitted by the light emitting element 120 can be irradiated to an external object, such as: the finger, which is located outside the sensing region 105, may also illuminate a portion of the external object located on a region occupying a predetermined area ratio within the sensing region 105. The sensing light enters the inside of the external object, then exits from a portion of the sensing region 105 that is not irradiated by the sensing light, and is received by the receiving unit 142 through the display device 10 for sensing. The light emitting elements 120 illuminate a portion of the external object located on an area with an area ratio smaller than 30% within the sensing region 105, that is, the sensing light entering the external object can be emitted from at least 70% of the area within the sensing region 105 that is not illuminated by the sensing light. Since the receiving unit 142 only needs the fingerprint image within the sensing area 10570% to complete the identification sensing, the limitation of the range of the light emitting device 120 irradiating the finger portion can be relaxed, and the sensing device has higher applicability.

In the embodiments, the sensing light emitted by the light emitting element 120 is projected on the display surface of the display panel 102 through the light transmitting through hole 1030 formed in the supporting plate 103 for sensing. Therefore, the relative position relationship between the illumination area of the sensing light on the display panel 102 and the sensing region 105 can be flexibly controlled by adjusting the positions of the light-transmitting through-hole 1030 and the light-emitting element 120 relative to the sensing region 105 and adjusting the size of the opening of the light-transmitting through-hole 1030, such as: the entire sensing region 105 is illuminated, a portion of the sensing region 105 is illuminated, or regions outside the sensing region 105 are illuminated to implement different sensing regimes corresponding to various illumination conditions.

Electronic equipment 1 is through setting up sensing module 12 that can launch and/or receive sensing light in order to realize original sensing function in display area 101 of display device 10 below display device 10, need not occupy electronic equipment 1's display area 101 area, is favorable to improving electronic equipment 1's screen ratio, promotes the whole impression of electronic equipment 1 main viewing surface.

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.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (15)

1. An electronic device for sensing an external object, comprising: the method comprises the following steps:

a display device for displaying a picture;

the supporting plate is arranged below the display device to support the display device, and a light-transmitting through hole is formed in the supporting plate; and

the sensing module is arranged below the supporting plate and used for transmitting and/or receiving sensing light through the light-transmitting through hole and the display device so as to sense an external object.

2. The electronic device of claim 1, wherein a region of the display device intersecting an optical path of the sensing module receiving the sensing light is defined as a sensing region, the external object contacts the display device in the sensing region, and the sensing light is returned by the external object and then received by the sensing module from the sensing region through the display device.

3. The electronic device of claim 2, wherein the sensing module emits sensing light to illuminate a portion of the external object outside the sensing region, the sensing light enters the interior of the external object and propagates toward the sensing region, and is emitted at a surface of the external object contacting the sensing region and received by the sensing module for sensing.

4. The electronic device of claim 3, wherein the portion of the external object outside of the sensing region comprises a portion of the external object that is in contact with a surface of the display device at a periphery of the sensing region and a portion of the external object that is outside of the sensing region that is not in contact with the surface of the display device.

5. The electronic device of claim 2, wherein illuminance of the sensing light emitted by the sensing module on the external object surface on at least a partial area of the sensing region is non-uniformly distributed.

6. The electronic device as claimed in claim 5, wherein the non-uniform distribution of the illuminance formed by the sensing light on the surface of the external object over at least a portion of the sensing region means that the difference of the illuminance per a space of 7-10 μm between the surface of the external object is greater than 30%.

7. The electronic device of claim 5, wherein the ratio of the area of the sensing region with non-uniform illumination distribution to the total area of the sensing region is equal to or greater than one third.

8. The electronic device of claim 7, wherein: the sensing module comprises one or more light-emitting elements, and the light-emitting elements simultaneously emit sensing light to the sensing area; or

The plurality of light emitting elements are divided into different combinations according to a preset rule, the light emitting elements belonging to the same combination emit sensing light to the sensing area at the same time, and the light emitting elements of different combinations respectively emit the sensing light to the sensing area at different time intervals.

9. The electronic device of claim 8, wherein: if the plurality of light emitting elements are symmetrically distributed about the center of the sensing region, the ratio of the overlapping areas of the plurality of irradiation regions correspondingly formed in the sensing region to the total area of the sensing region is less than two-thirds when the plurality of light emitting elements are symmetrically distributed and emit sensing light to the sensing region within the same time period.

10. The electronic device of claim 7, wherein: the sensing module comprises a pair of light-emitting elements which are symmetrically distributed relative to the center of the sensing region, two irradiation regions formed in the sensing region by the pair of light-emitting elements respectively are not overlapped with each other, and the pair of light-emitting elements simultaneously emit sensing light to the sensing region; or

The pair of light emitting elements respectively emit sensing light to the sensing area at different time intervals.

11. The electronic device of claim 7, wherein: the sensing module comprises a pair of light-emitting elements which are symmetrically distributed about the center of the sensing region, the pair of light-emitting elements respectively form an irradiation region covering the whole sensing region, and the pair of light-emitting elements respectively emit sensing light to the sensing region at different time intervals.

12. The electronic device of any of claims 1-11, wherein: the sensing light may be infrared or near infrared wavelength light, and the wavelength range is 750 nm to 1000 nm.

13. The electronic device of any of claims 1-11, wherein: the display device is a liquid crystal display device, and the liquid crystal display device comprises a liquid crystal display panel and a backlight module.

14. The electronic device of any of claims 2-11, wherein: the sensing module further comprises one or more receiving units, and the receiving units receive sensing light reflected by an external object so as to sense the external object.

15. The electronic device of claim 14, wherein: the area of the sensing region is larger than the field angle range of a single receiving unit, and the plurality of receiving units respectively receive the returned sensing light rays in the range of the sensing region for sensing.

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