CN210864744U - Sensing device and electronic equipment under screen - Google Patents
Sensing device and electronic equipment under screen Download PDFInfo
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- CN210864744U CN210864744U CN201921478068.5U CN201921478068U CN210864744U CN 210864744 U CN210864744 U CN 210864744U CN 201921478068 U CN201921478068 U CN 201921478068U CN 210864744 U CN210864744 U CN 210864744U
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- 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
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Abstract
The application provides a sensing device under screen, it includes liquid crystal display module assembly, receiving module assembly and one or more indicating light source, liquid crystal display module assembly is including the liquid crystal display panel who is used for the display frame and being located backlight unit of liquid crystal display panel below. The backlight module is used for providing backlight light required by display. The receiving module is used for receiving a sensing signal returned by an external object through at least part of the display module so as to sense the external object. The indicating light source is located below the backlight module and used for emitting indicating light, when the backlight module is closed and the receiving module performs sensing, the indicating light emitted by the indicating light source is transmitted to the liquid crystal display panel through the backlight module, and the liquid crystal display panel displays a preset marking image by utilizing the indicating light to mark a sensing area of the receiving module on the liquid crystal display module.
Description
Technical Field
The application belongs to the technical field of electronics, and particularly relates to a sensing device and electronic equipment under a screen.
Background
With the continuous development of smart phone technology, a full screen has become a development trend, and in order to meet the increasing screen occupation ratio, more and more sensing modules originally arranged on the front side of a mobile phone are hidden below or inside a screen. However, some sensing modules, for example fingerprint sensing module etc. need interact with the user and realize the sensing function, but when fingerprint sensing module set up in screen below or inside the screen, the unable accurate perception fingerprint detection area of user, consequently causes adverse effect for user's fingerprint identification operation and system identification efficiency.
SUMMERY OF THE UTILITY MODEL
The application provides a sensing device and an electronic device under a screen to solve the technical problem.
An embodiment of the present application provides an off-screen sensing device, which includes a liquid crystal display module including: the liquid crystal display panel is used for displaying pictures; the backlight module is positioned below the liquid crystal display panel and used for providing backlight light required by display for the liquid crystal display panel; the receiving module is used for receiving a sensing signal returned by an external object through at least part of the liquid crystal display module so as to sense the external object; and one or more indicating light sources positioned below the backlight module, wherein the indicating light sources are used for emitting indicating light, when the backlight module closes the backlight and the receiving module executes sensing, the indicating light emitted by the indicating light sources is transmitted to the liquid crystal display panel through the backlight module, and the liquid crystal display panel displays a preset marking image by using the indicating light to mark a sensing area of the receiving module on the liquid crystal display module.
In some embodiments, the external object is a finger fingerprint, and the receiving module is configured to receive a sensing signal returned by the finger fingerprint and convert the sensing signal into an electrical signal to obtain fingerprint information.
In some embodiments, the sensing signal comprises an optical signal or/and an ultrasonic signal.
In some embodiments, an area of the liquid crystal display module for displaying a picture is defined as a display area, an area of the liquid crystal display module which cannot display a picture is defined as a non-display area, and the sensing area is located in the display area.
In some embodiments, an area on the outer surface of the liquid crystal display module, where the preset indication image is displayed, is defined as an indication area, and the indication area and the sensing area are partially or completely overlapped; or
The sensing area is smaller than the indicating area and is located within the indicating area; or
The indication region is located at a periphery of the sensing region and surrounds the sensing region.
In some embodiments, the under-screen sensing device further includes a driving circuit, the liquid crystal display panel has a plurality of display pixels, and the driving circuit drives the display pixels on the liquid crystal display panel, which are opposite to the indication area, to display a preset indication image.
In some embodiments, the sensing signal is a sensing beam, and the sensing beam returned by the external object includes a sensing beam reflected by the external object and a sensing beam transmitted after entering the external object.
In some embodiments, the backlight module includes a backlight source, a light guide plate, and a reflector plate, the backlight source is located at one side of the light guide plate and is used for emitting backlight light, the backlight light enters the light guide plate and is mixed and then is emitted to the liquid crystal display panel, the indicator light source is located below the reflector plate, and the reflector plate is located below the bottom surface of the light guide plate and is used for reflecting the backlight light leaking from the light guide plate back into the light guide plate.
In some embodiments, the reflective sheet has a transmittance of greater than 0.3% and less than 5% for the indicator light.
In some embodiments, the indication light source has a predetermined light-emitting angle range, an area of the reflector sheet within the light-emitting angle range is defined as an incident area, no hole is formed in the incident area, and at least a portion of the indication light is projected upward from the incident area through the reflector sheet to the liquid crystal display panel.
In some embodiments, the indication light source has a predetermined light-emitting angle range, an area of the reflector plate within the light-emitting angle range is defined as an incident area, one or more light holes are formed in the incident area, a portion of the indication light passes through the reflector plate via the light holes and is then projected to the liquid crystal display panel, and another portion of the indication light passes through the reflector plate without passing through the light holes and is then projected to the liquid crystal display panel.
In some embodiments, the indicator light is visible light, and the indicator light has a wavelength ranging from 400nm to 780 nm.
In some embodiments, the sensing signal is a sensing beam, and the sensing beam is infrared or near infrared light with a wavelength ranging from 750nm to 2000 nm.
In some embodiments, the apparatus further comprises an emission module configured to emit a sensing signal to the external object.
In some embodiments, the liquid crystal display module includes a protective cover plate, the protective cover plate is located on the outermost side of the liquid crystal display module, the liquid crystal display panel is located below the protective cover plate, the protective cover plate includes an upper surface and a lower surface that are oppositely disposed, the upper surface of the protective cover plate is the outer surface of the liquid crystal display module, the transmitting module is located below the protective cover plate, sensing light beams emitted by the transmitting module enter the protective cover plate from the lower surface of the protective cover plate for total reflection propagation, the sensing light beams propagated to the sensing area through total reflection are subjected to diffuse reflection at a position where an external object contacts with the upper surface of the protective cover plate, and then can penetrate out of the protective cover plate and be received by the receiving module through at least part of the liquid crystal display module.
In some embodiments, the total power of the backlight light sources is greater than the total power of the one or more indicator light sources, and the indicator light sources are off when the backlight light sources are on.
In some embodiments, the reflective sheet has a transmittance of greater than 0.6% and less than 3% for the indicator light.
The embodiment of the present application further provides an electronic device, which includes the under-screen sensing device as described in any of the above embodiments, and the electronic device is configured to execute a corresponding function according to a sensing result of the under-screen sensing device.
The technical scheme that this application provided is through setting up the instruction light source sends instruction light the backlight source is replaced when closing the backlight source provides instruction light for display panel, display panel borrows by instruction light shows that preset mark image marks the position at sensing area place to guide user's cooperation sensing, saved the consumption, improved electronic equipment's battery duration.
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 structure diagram of an electronic device provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of an optical path of the electronic device shown in FIG. 1 when sensing by the off-screen sensing device;
FIG. 3 is a schematic diagram of an optical path of the under-screen sensing device of the electronic apparatus in FIG. 1 for indicating a sensing area;
FIG. 4 is a schematic optical path diagram illustrating a sensing region of an electronic device according to an alternative embodiment of the present disclosure;
fig. 5 is a schematic optical path diagram of an electronic device according to an alternative embodiment of the present disclosure during sensing and during marking a sensing area;
FIG. 6 is a schematic optical path diagram illustrating a sensing region of an electronic device according to an alternative embodiment of the present disclosure;
FIG. 7 is a schematic front view of an underscreen sensing device according to an alternative embodiment of the present application;
FIG. 8 is a schematic front view of an underscreen sensing device according to an alternative embodiment of the present application;
FIG. 9 is a schematic front view of an underscreen sensing device according to an alternative embodiment of the present application;
fig. 10 is a schematic front view of an underscreen sensing device according to an alternative embodiment of the present disclosure.
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 to 3, the present invention discloses an electronic device 1, wherein the electronic device 1 is, for example, but not limited to, a consumer electronic product, a household electronic product, a vehicle-mounted electronic product, a financial terminal product, and other suitable types of electronic products. The consumer electronic products include, for example, mobile phones, tablet computers, notebook computers, desktop monitors, all-in-one computers, and the like. Household electronic products are, for example, smart door locks, televisions, refrigerators and the like. The vehicle-mounted electronic product is, for example, a vehicle-mounted navigator, a vehicle-mounted DVD, or the like. The financial terminal products are ATM machines, terminals for self-service business and the like.
The electronic device 1 comprises an underscreen sensing arrangement 10. The underscreen sensing device 10 is used for sensing external objects located outside the electronic device 1, such as: fingerprint on finger, sensing. The electronic device 11 is configured to perform a corresponding function according to a sensing result of the off-screen sensing device 10. The corresponding function includes but is not limited to unlocking, paying, starting application program after identifying the external object, or acquiring body function parameters such as heart rate and blood oxygen content of the user to judge any one or more combinations of emotion and health condition of the user.
The under-screen sensing device 10 includes a display module 11, a transmitting module 12, a receiving module 13, and one or more indication light sources 14. The display module 11 is used for displaying pictures. The transmitting module 12 is used for transmitting a sensing signal to an external object. The display module 11 includes an outer surface 110 located at the outermost side. The sensing signal returned by the external object enters the interior of the off-screen sensing device 10 through the outer surface 110, and is received by the receiving module 13 for corresponding sensing. The sensing signal returned by the external object may be a sensing signal reflected by the external object (see the dotted path emitted from the emitting module 12 in fig. 2), or a sensing signal transmitted after entering the external object (see the solid path emitted from the emitting module 12 in fig. 2), which is not limited in this application. The sensing signal may be, but is not limited to, an optical signal or/and an ultrasonic signal.
In the present application, the Display module 11 is preferably a Liquid Crystal Display (LCD) module. However, the display module 11 may alternatively be a module having other suitable passive light emitting display panels, such as an electronic paper display module.
In the application, the display module 11 is exemplified as a liquid crystal display module. The lcd module 11 includes an lcd panel 111 and a backlight module 112 located below the lcd panel 111. The liquid crystal display panel 111 is used for displaying a picture. The backlight module 112 is used for providing backlight light for the liquid crystal display panel 111.
The liquid crystal display panel 111 has a plurality of display pixels (not shown). Optionally, the under-screen sensing device 10 further includes a driving circuit (not shown). The driving circuit realizes corresponding picture display by modulating backlight light penetrating through the display pixels. The display pixel includes, for example, a pixel electrode, a common electrode for forming an electric field with the pixel electrode, and a switch. The driving circuit is connected to the pixel electrode through a switch. The driving circuit can adjust the gray scale displayed by the display pixel by adjusting the clamping pressure applied between the pixel electrode and the common electrode.
The backlight module 112 includes a brightness enhancement film 116, a diffusion film 117, a backlight source 113, a light guide plate 114 and a reflection film 115. The light guide plate 114 includes a light emitting surface 1142, a bottom surface 1140 disposed opposite to the light emitting surface 1142, and a light incident surface 118 connecting the light emitting surface 1142 and the bottom surface 1140. The backlight light source 113 is used for emitting backlight light. The backlight light is visible light. The backlight light enters the light guide plate 114 from the light incident surface 118 and is mixed and then emitted from the light emitting surface 1142 to the liquid crystal display panel 111. The reflective sheet 115 is located below the bottom surface 1140 of the light guide plate 114, and is used for reflecting the backlight light leaking from the bottom surface 1140 of the light guide plate 114 back into the light guide plate 114, so as to improve the utilization rate of the backlight light. The diffusion sheet 117 is located at one side of the light exit surface 1142 of the light guide plate 114, and is used for diffusing the backlight light emitted from the light exit surface 1142 of the light guide plate 114, so as to improve the brightness uniformity of the backlight light. The brightness enhancement sheet 116 is located on a side of the diffusion sheet 117 facing away from the light guide plate 114, and is used for concentrating the backlight light diffused by the diffusion sheet 117 along the light exit direction, so as to improve the overall brightness of the backlight. It can be understood that, when the display module 11 is in the off-screen state, the backlight source 113 is turned off.
Alternatively, in some embodiments, the brightness enhancement sheet 116 may be omitted.
It is understood that the liquid crystal display module 11 may further include a protective cover 119. The protective cover 119 is located on the outermost side of the liquid crystal display module 11 and is used for protecting the liquid crystal display module 11. The protective cover 119 includes an upper surface 1190 and a lower surface 1192 disposed opposite to each other. The liquid crystal display panel 111 is located on the lower surface 1192 side of the protective cover 119. The outer surface 110 of the lcd module 11 is an upper surface 1190 of the protective cover 119.
The transmitting module 12 may be located below at least a portion of the display module 11 or inside the display module 11, and the specific location thereof is not limited herein. In this embodiment, the sensing signal is a sensing beam. The emission module 12 is located below the backlight module 112 to emit a sensing beam to an external object through at least a portion of the display module 11. The sensing beam may be infrared or near infrared light, with a wavelength range of 750nm to 2000 nm. The Emitting module 12 may include, but is not limited to, one or more Light Emitting Diodes (LEDs), Vertical Cavity Surface Emitting Lasers (VCSELs), and Laser Diodes (LDs).
The maximum spatial range in which the receiving module 13 can receive the sensing signal returned via the external object is defined as a signal receiving range of the receiving module 13. For example: the sensing signal is a sensing light beam, the receiving module 13 includes, for example, a lens module for imaging, and a field of View (FOV) of the lens module is a signal receiving range of the receiving module 13. The portion of the outer surface 110 located within the signal receiving range of the receiving module 13 is defined as a sensing region S1, and the sensing signal returned by the external object located in the sensing region S1 can be received by the receiving module 13. The sensing area S1 is, for example but not limited to, located opposite to the receiving module 13, and the sensing signal returned by the external object is directly received by the receiving module 13 after passing through at least a part of the display module 11. It is understood that the returned sensing signals may also be received by the receiving module 13 not directly after passing through at least a portion of the display module 11, but through signal conducting elements, such as: a light guide structure, etc. which is conducted to the receiving module 13 for receiving, for this reason, the receiving module 13 may also be disposed at another position not opposite to the sensing region 130. In this embodiment, the external object is a finger fingerprint, and the sensing signal is a sensing beam. The finger is in contact with the sensing area S1 of the outer surface 110 so that the sensing beam returning via the finger fingerprint can be received by the receiving module 13. The receiving module 13 senses the fingerprint information of the finger according to the received sensing light beam.
The area of the display module 11 for displaying the image is defined as a display area 104. The area of the display module 11 that cannot display the image is defined as a non-display area 106. The non-display region 106 may be located at the periphery or edge of the display region 104. The display area 104 may completely coincide with a pixel area (not shown) for displaying an image in the display module 11. A non-light-transmitting film is disposed on a portion of the protective cover 119 opposite to the non-display area 106, and is used for blocking visible light so that a user cannot see internal elements of the underscreen sensing device 10 from the non-display area 106. It is understood that the display area 140 may also be smaller than a pixel area for displaying an image in the display module 11, that is, a part of the pixel area may be located in the non-display area 106 and shielded by the non-light-transmitting film.
It should be noted that the position of the emission module 12 is not limited to the position below the backlight module 112, and may be located at any other suitable position, for example, at the side of the liquid crystal display panel 111 or the backlight module 112. In addition, when the sensing signal emitted by the emission module 12 mainly exits from above the protective cover 119 through the non-transparent film, the non-transparent film can transmit the sensing signal at least in the irradiation area of the emission module 12. Wherein the sensing signal is a non-visible light signal, such as infrared or near-infrared light.
Alternatively, in some embodiments, the transmitting module 12 may be omitted.
Optionally, the sensing region S1 is located within the display area 104. The receiving module 13 is disposed below the display module 11 and located in the display area 104. The sensing area S1 is disposed opposite to the receiving module 13. The projection of the receiving module 13 on the outer surface 110 is located within the sensing region S1.
It is understood that, in other alternative embodiments, the receiving module 13 may also be disposed inside the display module 11. For example: the receiving module 13 may be a photosensitive element disposed in the display pixel, and the sensing light beam returned by the external object is received by the photosensitive element after passing through at least a portion of the display module 11 to implement corresponding sensing. The receiving module 13 may also be disposed at other suitable positions, which is not specifically limited in this application.
The indication light source 14 is disposed below the backlight module 112 and configured to emit an indication light, and a partial area of the outer surface 110 that can be irradiated by the indication light through the display module 11 is defined as an indication area D1. The indication region D1 can be used to display a preset indication image on the outer surface to indicate the position of the sensing region S1, so as to guide the user to cooperate with the sensing. For example: if the off-screen sensing device 10 is an off-screen fingerprint recognition device, the indication area D1 can be used to guide the user to place a finger on the sensing area S1 for fingerprint recognition. In this embodiment, the indication area D1 is located in the display area 104 and is a partial area of the display area 104. Optionally, the indication region D1 completely coincides with the sensing region S1, or the indication region D1 is located in the sensed region S1, or the sensing region S1 is located in the indication region D1 but the two are not very different in area, or the indication region D1 surrounds the sensing region S1, or a portion of the indication region D1 overlaps a portion of the sensing region S1, and so on.
It is understood that the indicator light source 14 is a visible light source and the emitted indicator light is visible light. The indicating Light source 14 is, for example, the Light Emitting Diode (LED), the Vertical Cavity Surface Emitting Laser (VCSEL), and the Laser Diode (LD).
One or more of the indicating light sources 14 may be arranged in a predetermined regular or irregular arrangement. For example: the plurality of indication light sources 14 are symmetrically distributed with the receiving module 13 as a center, the plurality of indication light sources 14 and the receiving module 13 may be located on the same horizontal plane or on different horizontal planes, and the plurality of indication light sources 14 may be arranged at equal intervals or at unequal intervals.
Specifically, one or more of the indicator light sources 14 are positioned below the reflector sheet 115. The indicating light emitted by one or more of the indicating light sources 14 is transmitted through the reflective sheet 115, and then emitted to the lower side of the liquid crystal display panel 111 after passing through the film layer structures such as the light guide plate 114, the diffusion sheet 117, and the brightness enhancement sheet 116. The transmittance of the reflective sheet 115 for the indicating light is, for example, less than 10% and greater than 0. Optionally, the transmittance of the reflective sheet 115 for the indicating light is less than 5% and greater than 0.3%. Therefore, the display effect of the liquid crystal display panel 111 when displaying the full screen and the display effect when displaying the preset marking image are both better. However, alternatively, in some embodiments, the transmittance of the reflective sheet 115 for the indication light may be less than 3% and greater than 0.6%.
When the sensing signal is infrared or near-infrared light, the reflective sheet 115 can also transmit the infrared or near-infrared light, and has a transmittance of more than 70% for example.
The reflective sheet 115 is, for example but not limited to, an Enhanced Specular Reflector (ESR), and is formed by laminating or pressing a plurality of layers of polymers having refractive indexes that are not completely the same with respect to visible light beams and near infrared light beams. However, alternatively, in some embodiments, the reflective sheet 115 may have other suitable structures.
The diffusion sheet 117 homogenizes the passing indicator light, and thus the diffusion angle of the indicator light emitted from the indicator light source 14 can be increased and the indicator light can be more uniform as a whole. Accordingly, when the plurality of indication light sources 14 are disposed around the receiving module 13, the visible light beams emitted by the plurality of indication light sources 14 can form a whole bunch of light beams above the receiving module 13 or below a local area of the liquid crystal display panel 111, for example, after being subjected to the homogenization process by the diffusion sheet 117.
Accordingly, when the backlight source 113 is turned off and the receiving module 13 performs fingerprint sensing, the indication light source 14 provides a visible light beam for image display of the liquid crystal display panel 111, and the driving circuit drives a part of the display pixels of the liquid crystal display panel 111 to display a preset indication image in the indication area D1. Note that, the area of the liquid crystal display panel 111 displaying the preset logo image is the indication area D1. The predetermined indication image is, for example, but not limited to, a fingerprint pattern.
As can be seen from the above, if the display pixels located in the irradiation range of the indicating light are turned on, the indicating light can penetrate through the display pixels and irradiate the outer surface 110 of the liquid crystal display module 11 to form the indicating area D1. The lcd panel 111 may display a predetermined logo image in the indication area D1 by the indication light. The indication image is used for prompting the user of the position of the sensing region S1 so that the user can contact the finger with the sensing region S1 during detection. The logo image may be, for example, various other light emitting regions having different shapes, in addition to the fingerprint pattern described above. The driving circuit can change the shape, brightness and color of the indication image by adjusting the light transmission state of the display pixels of the liquid crystal display panel 111.
It is understood that, in order to be able to form the indicating area D1 at the position of the sensing area S1 opposite to the receiving module 13, the light emitting direction of the indicating light source 14 may be inclined toward the receiving module 13.
Alternatively, the indication light source 14 is turned off when the backlight light source 113 is turned on.
The total power of the one or more indicator light sources 14 is less than the total power of the backlight light sources 113. The standby capability of the electronic device 1 can thereby be improved.
Alternatively, the indication light source 14 has, for example, a preset light emitting angle range. The light-emitting angle range is defined as a spatial range which can be irradiated by the indicating light emitted by the indicating light source 14. The area of the reflective sheet 115 within the range of the light emission angle of the indicator light source 14 is defined as an incident area I1. The incident area I1 on the reflective sheet 115 is not perforated, and at least a portion of the indicator light is projected upward from the incident area through the reflective sheet 115 to the liquid crystal display panel 111 to display the predetermined indication image.
As shown in fig. 4, in other alternative embodiments, one or more light-transmitting holes 1150 may be formed in the reflector sheet 115 at a position opposite to the emission module 12, a portion of the indicating light may pass through the light-transmitting holes 1150 and then pass through the reflector sheet 115 to be projected onto the liquid crystal display panel 111, and a portion of the indicating light may pass through the reflector sheet 115 without passing through the light-transmitting holes 1150 and then be projected onto the liquid crystal display panel 111. The light transmission hole 1150 is opened in the incident region I1. The light-transmitting holes 1150 formed in the reflector 115 can increase the overall luminous flux of the indicating light projected onto the lcd panel 111 through the reflector 115, which is beneficial to improving the brightness of the displayed indication image, or reducing the power consumption of the indicating light source 14 while maintaining the same brightness of the indication image. The light transmission hole 1150 is located in the incident region I1. A plurality of the indicating light sources 14 may form a corresponding plurality of incident regions D1 on the reflective sheet 115, and one or more light-transmitting holes 1150 may be formed in each of the incident regions D1. Since the size of the light-transmitting hole 1150 is small, for example: 10 microns, the display effect of the liquid crystal display module 11 is not affected.
As shown in fig. 5, in other alternative embodiments, the transmitting module 12 may also be located under a portion of the protective cover 119 in the non-display area 106. The sensing light beam emitted by the emitting module 12 enters the protective cover 19 from the lower surface 1192 of the protective cover 119 for total reflection propagation, and the sensing light beam propagated to the sensing region S1 through total reflection is diffusely reflected at the contact position between the fingerprint ridge and the upper surface 1190 of the protective cover 1190, and then can penetrate through the protective cover 119 and be received by the receiving module 14 through at least part of the display module 11. The sensing light beams after diffuse reflection irradiate towards all directions. The sensing light beam emitted by the emission module 12 and the sensing light beam entering the interior of the protective cover 119 are non-collimated light beams or non-parallel light beams. The sensing light beam of the non-collimated light comprises a plurality of sensing light rays, and the included angle of at least two sensing light rays is not less than 10 degrees, 15 degrees, 20 degrees and 25 degrees.
As shown in fig. 6, it can be understood that a plurality of indication regions D1 can be formed on the outer surface 110 after the indication light rays emitted by the plurality of indication light sources 14 are homogenized by each film layer in the backlight module 112. The plurality of indication regions D1 may be separated from each other or partially overlapped, and the liquid crystal display panel 111 may respectively display the indication images in the plurality of indication regions D1, which is not limited in this application.
Alternatively, a plurality of the indicator regions D1 may partially coincide with the sensing region S1 or cover the entire sensing region S1. For example, as shown in fig. 7, a plurality of the indicating regions D1 are disposed around the sensing region S1 and partially overlap with the sensing region S1, respectively, and a plurality of the indicating regions D1 do not overlap with each other. Alternatively, as shown in fig. 8, a plurality of the indication regions D1 may be located inside the sensing region S1. Alternatively, as shown in fig. 9, a plurality of the indicating regions D1 partially overlap the sensing region S1, and a plurality of the indicating regions D1 also overlap each other to form an indicating region D1 which is large enough to cover the entire sensing region S1. Alternatively, as shown in fig. 10, a plurality of the indicating regions D1 are located at the periphery of the sensing region S1 and surround the sensing region S1. The pattern formed by the midpoints of the plurality of indicator regions D1 may be a circle, a triangle, a square, a diamond, a hexagon, or the like. The indication regions D1 may be arranged symmetrically around the sensing region S1.
In the present embodiment, the receiving module 13 and the indication light source 14 are both disposed below the liquid crystal display module 11 and located in the display area 104. The indication light source 14 is located at the periphery of the receiving module 13 and is disposed around the receiving module 13. Optionally, the indication light source 14 is centered on the receiving module 13 and distributed in a central symmetry manner. When the liquid crystal display module 11 is in the off-screen state, or when the liquid crystal display module 11 is in the off-screen state and needs to perform corresponding sensing, the backlight source 113 is turned off, and the indication light source 14 emits indication light to form an indication area D1 on the outer surface 110 of the liquid crystal display module 11. The driving circuit drives the display pixels of the lcd panel 111 directly opposite to the indication area D1 to display a predetermined indication image, so as to indicate the position of the sensing area S1. The number of the indicating light sources 14 is less than the number of the backlight light sources 113. Therefore, the power consumption of the indicating light source 14 is less than that of the backlight light source 113. Therefore, the indication light source 14 with lower power consumption indicates the sensing region S1 in the screen-off state, so that the backlight light source 113 with higher power consumption does not need to be activated, which has the beneficial effect of saving energy.
It is understood that the indication light source 14, the receiving module 13, or/and the transmitting module 12 may be attached to the bottom of the display module 11. Alternatively, the indication light source 14, the receiving module 13, or/and the transmitting module 12 may also be configured to emit light through other structures of the electronic device 1, such as: the middle frame or the rubber iron of the mobile phone is fixed below the display module 11. The fixing manner of the indication light source 14, the receiving module 13, or/and the transmitting module 12 is not particularly limited in this application.
In summary, in the embodiment of the present application, the indication light source 14 is configured to emit the indication light, which can replace the backlight light of the backlight light source 113, and the indication light is utilized to mark the position of the sensing area S1, so as to guide the user to perform the sensing in a matching manner, thereby saving power consumption and improving battery endurance of the electronic device 1.
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 underscreen sensing device, comprising:
a liquid crystal display module comprising:
the liquid crystal display panel is used for displaying pictures; and
the backlight module is positioned below the liquid crystal display panel and used for providing backlight light required by display for the liquid crystal display panel;
the receiving module is used for receiving a sensing signal returned by an external object through at least part of the liquid crystal display module so as to sense the external object; and
the backlight module is used for receiving the backlight light emitted by the light source, the receiving module is used for receiving the backlight light emitted by the light source, one or more indicating light sources are positioned below the backlight module, the indicating light sources are used for emitting indicating light, when the backlight module closes the backlight light and the receiving module executes sensing, the indicating light emitted by the indicating light sources is transmitted to the liquid crystal display panel through the backlight module, and the liquid crystal display panel displays a preset marking image by utilizing the indicating light so as to mark a sensing area of the receiving module on the liquid crystal display module.
2. The off-screen sensing device of claim 1, wherein the external object is a finger fingerprint, and the receiving module is configured to receive a sensing signal returned by the finger fingerprint and convert the sensing signal into an electrical signal to obtain fingerprint information.
3. The underscreen sensing device of claim 1, wherein the sensing signal is a sensing beam, the sensing beam is infrared or near infrared light, and the wavelength range is 750nm to 2000 nm.
4. The device as claimed in claim 1, wherein the area of the liquid crystal display module for displaying the image is defined as a display area, the area of the liquid crystal display module which cannot display the image is defined as a non-display area, and the sensing area is located in the display area.
5. The off-screen sensing device of claim 1, wherein an area on an outer surface of the liquid crystal display module where the preset indication image is displayed is defined as an indication area, and the indication area is partially or completely overlapped with the sensing area; or
The sensing area is smaller than the indicating area and is located within the indicating area; or
The indication region is located at a periphery of the sensing region and surrounds the sensing region.
6. The under-screen sensing device as claimed in claim 5, further comprising a driving circuit, wherein the LCD panel has a plurality of display pixels, and the driving circuit drives the display pixels of the LCD panel opposite to the indication region to display a predetermined indication image.
7. The underscreen sensing apparatus of claim 1, wherein the sensing signal is a sensing beam, and the sensing beam returned via the external object includes a sensing beam reflected by the external object and a sensing beam transmitted after entering the external object.
8. The device as claimed in claim 1, wherein the backlight module comprises a backlight source, a light guide plate and a reflector plate, the backlight source is disposed at one side of the light guide plate and used for emitting backlight light, the backlight light enters the light guide plate and is mixed and then emitted to the liquid crystal display panel, the indicator light source is disposed below the reflector plate, and the reflector plate is disposed below the bottom surface of the light guide plate and used for reflecting the backlight light leaked from the light guide plate back into the light guide plate.
9. The underscreen sensing device of claim 8, wherein the reflective sheet has a transmittance of greater than 0.3% and less than 5% for the indicator light.
10. The device as claimed in claim 8, wherein the indication light source has a predetermined light-emitting angle range, the area of the reflector within the light-emitting angle range is defined as an incident area, no hole is formed in the incident area, and at least a portion of the indication light is projected from the incident area to the lcd panel after passing through the reflector; or one or more light holes are formed in the incident area, part of the indicating light passes through the reflector plate through the light holes and then is projected to the liquid crystal display panel, and the other part of the indicating light passes through the reflector plate without passing through the light holes and then is projected to the liquid crystal display panel.
11. The underscreen sensing device of claim 1, further comprising an emission module configured to emit a sensing signal to the external object.
12. The underscreen sensing device of claim 11, wherein the liquid crystal display module includes a protective cover plate, the protective cover plate is positioned at the outermost side of the liquid crystal display module, the liquid crystal display panel is positioned below the protective cover plate, the protective cover plate comprises an upper surface and a lower surface which are oppositely arranged, the upper surface of the protective cover plate is the outer surface of the liquid crystal display module, the transmitting module is positioned below the protective cover plate, the sensing light beams transmitted by the transmitting module enter the protective cover plate from the lower surface of the protective cover plate for total reflection propagation, the sensing light beams propagated to the sensing area through total reflection are subjected to diffuse reflection at the position where an external object is contacted with the upper surface of the protective cover plate, and the protective cover plate can be penetrated out and at least part of the liquid crystal display module is received by the receiving module.
13. The underscreen sensing device as claimed in claim 8 wherein a total power of said backlight light source is greater than a total power of said one or more indicator light sources, and wherein said indicator light sources are off when said backlight light source is on.
14. The underscreen sensing device of claim 9, wherein the reflective sheet has a transmittance of greater than 0.6% and less than 3% for the indicator light.
15. An electronic device, comprising the under-screen sensing device as claimed in any one of claims 1 to 14, wherein the electronic device is configured to perform a corresponding function according to a sensing result of the under-screen sensing device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2019106909932 | 2019-07-29 | ||
| CN201910690993 | 2019-07-29 |
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| CN210864744U true CN210864744U (en) | 2020-06-26 |
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| CN201921478068.5U Active CN210864744U (en) | 2019-07-29 | 2019-09-05 | Sensing device and electronic equipment under screen |
| CN201921475111.2U Active CN210864743U (en) | 2019-07-29 | 2019-09-05 | Sensing device and electronic equipment under screen |
| CN201921475472.7U Active CN211427356U (en) | 2019-07-29 | 2019-09-05 | Fingerprint sensing device and electronic equipment |
| CN201910838849.9A Withdrawn CN110516657A (en) | 2019-07-29 | 2019-09-05 | Sensing device and electronic equipment under a kind of screen |
| CN201910839358.6A Withdrawn CN110458151A (en) | 2019-07-29 | 2019-09-05 | A kind of fingerprint acquisition apparatus and electronic equipment |
| CN201910838857.3A Withdrawn CN110458150A (en) | 2019-07-29 | 2019-09-05 | Sensing device and electronic equipment under a kind of screen |
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| CN201921475111.2U Active CN210864743U (en) | 2019-07-29 | 2019-09-05 | Sensing device and electronic equipment under screen |
| CN201921475472.7U Active CN211427356U (en) | 2019-07-29 | 2019-09-05 | Fingerprint sensing device and electronic equipment |
| CN201910838849.9A Withdrawn CN110516657A (en) | 2019-07-29 | 2019-09-05 | Sensing device and electronic equipment under a kind of screen |
| CN201910839358.6A Withdrawn CN110458151A (en) | 2019-07-29 | 2019-09-05 | A kind of fingerprint acquisition apparatus and electronic equipment |
| CN201910838857.3A Withdrawn CN110458150A (en) | 2019-07-29 | 2019-09-05 | Sensing device and electronic equipment under a kind of screen |
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| CN112085006A (en) * | 2020-09-29 | 2020-12-15 | 北京小米移动软件有限公司 | Electronic device |
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| CN210864744U (en) * | 2019-07-29 | 2020-06-26 | 深圳阜时科技有限公司 | Sensing device and electronic equipment under screen |
| CN111106137A (en) * | 2019-11-22 | 2020-05-05 | 深圳阜时科技有限公司 | Optical integrated device |
| CN111339815A (en) * | 2019-11-28 | 2020-06-26 | 深圳阜时科技有限公司 | Optical detection device and electronic equipment |
| CN110850635B (en) * | 2019-11-28 | 2022-07-29 | 京东方科技集团股份有限公司 | Backlight module, manufacturing method and display device |
| CN111061090B (en) * | 2019-12-16 | 2022-11-01 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN111199190B (en) * | 2019-12-19 | 2024-08-13 | 深圳阜时科技有限公司 | Optical detection device |
| CN111258099B (en) * | 2020-02-28 | 2022-07-26 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114627513A (en) * | 2022-02-24 | 2022-06-14 | 业泓科技(成都)有限公司 | Display module and electronic equipment |
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| CN109791599B (en) * | 2016-09-17 | 2023-11-14 | 深圳市汇顶科技股份有限公司 | Under-screen optical sensor module for on-screen fingerprint sensing |
| CN107958145B (en) * | 2016-11-03 | 2023-03-14 | 柳州梓博科技有限公司 | Display device and electronic device |
| WO2018161923A1 (en) * | 2017-03-07 | 2018-09-13 | Shenzhen GOODIX Technology Co., Ltd. | Devices with peripheral task bar display zone and under-lcd screen optical sensor module for on-screen fingerprint sensing |
| CN107132946A (en) * | 2017-04-26 | 2017-09-05 | 深圳市万普拉斯科技有限公司 | Fingerprint recognition based reminding method, device, storage medium and computer equipment |
| CN107665079A (en) * | 2017-09-26 | 2018-02-06 | 深圳天珑无线科技有限公司 | The display methods and display device of a kind of user interface |
| CN107728979A (en) * | 2017-09-30 | 2018-02-23 | 联想(北京)有限公司 | A kind of processing method and electronic equipment |
| CN108183982A (en) * | 2017-12-26 | 2018-06-19 | 维沃移动通信有限公司 | A kind of mobile terminal |
| CN109154961A (en) * | 2018-02-26 | 2019-01-04 | 深圳市汇顶科技股份有限公司 | Optics fingerprint sensing in LCD screen based on the optical imagery for utilizing lens-pinhole module and other optical designs |
| CN109313703B (en) * | 2018-08-15 | 2022-02-08 | 深圳市汇顶科技股份有限公司 | Optical fingerprint identification system under screen, backlight module, display screen and electronic equipment |
| CN109144643B (en) * | 2018-08-15 | 2021-06-15 | Oppo广东移动通信有限公司 | Fingerprint identification prompting method and device, storage medium and electronic equipment |
| CN109040370A (en) * | 2018-08-31 | 2018-12-18 | 努比亚技术有限公司 | A kind of fingerprint identification method, terminal and computer readable storage medium |
| CN209072544U (en) * | 2018-10-15 | 2019-07-05 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and terminal device with fingerprint identification function |
| CN109564628A (en) * | 2018-10-15 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Fingerprint identification method, device and the terminal device with fingerprint identification function |
| CN109564630A (en) * | 2018-11-09 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Liquid crystal display fingerprint mould group, fingerprint identification method, electronic equipment and storage medium |
| CN109709700A (en) * | 2019-01-16 | 2019-05-03 | 柳州阜民科技有限公司 | A kind of display device and the electronic equipment using the display device |
| CN210864744U (en) * | 2019-07-29 | 2020-06-26 | 深圳阜时科技有限公司 | Sensing device and electronic equipment under screen |
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- 2019-09-05 CN CN201921475111.2U patent/CN210864743U/en active Active
- 2019-09-05 CN CN201921475472.7U patent/CN211427356U/en active Active
- 2019-09-05 CN CN201910838849.9A patent/CN110516657A/en not_active Withdrawn
- 2019-09-05 CN CN201910839358.6A patent/CN110458151A/en not_active Withdrawn
- 2019-09-05 CN CN201910838857.3A patent/CN110458150A/en not_active Withdrawn
Cited By (1)
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| CN112085006A (en) * | 2020-09-29 | 2020-12-15 | 北京小米移动软件有限公司 | Electronic device |
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| CN210864743U (en) | 2020-06-26 |
| CN211427356U (en) | 2020-09-04 |
| CN110516657A (en) | 2019-11-29 |
| CN110458151A (en) | 2019-11-15 |
| CN110458150A (en) | 2019-11-15 |
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