CN109863508B - Fingerprint identification module under LCD screen, LCD device and terminal equipment - Google Patents
Fingerprint identification module under LCD screen, LCD device and terminal equipment Download PDFInfo
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- CN109863508B CN109863508B CN201980000120.2A CN201980000120A CN109863508B CN 109863508 B CN109863508 B CN 109863508B CN 201980000120 A CN201980000120 A CN 201980000120A CN 109863508 B CN109863508 B CN 109863508B
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Abstract
The application provides fingerprint identification module, LCD device and terminal equipment under LCD screen, wherein, the top of fingerprint identification module is provided with backlight unit under the LCD screen, and backlight unit includes: the fingerprint identification module under the first prism membrane, LCD screen includes: the projection of the first lens in the vertical direction is positioned at the edge area of the first optical sensor; the first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light on the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal which is used for generating a fingerprint image. Therefore, the integrity of the fingerprint image is ensured, and the smooth completion of the fingerprint identification process is further promoted.
Description
Technical Field
The application relates to the technical field of fingerprint identification, in particular to a fingerprint identification module under an LCD screen, an LCD device and terminal equipment.
Background
Fingerprint identification technology is often applied to display screens of intelligent terminals such as mobile phones and tablet computers. Future liquid crystal display (Liquid Crystal Display, LCD) screens will occupy a place in the display field.
Wherein, LCD screen includes from top to bottom in proper order: glass board, liquid crystal layer, backlight unit and LCD screen fingerprint identification module still include emitting diode (Light Emitting Diode, LED) in glass board below, and this backlight unit includes from last to down in proper order: prism film, dodging film, light guide plate, reflecting film and steel plate. The prism film is used for focusing scattered light rays at a certain angle to be emitted from the backlight source by utilizing the refraction and total reflection principles. Fingerprint identification module under LCD screen includes from last to down in proper order: the fingerprint sensor comprises a lens and an optical sensor, wherein the lens is used for receiving reflected light generated by a fingerprint and focusing the reflected light on the optical sensor, and the optical sensor is used for converting the reflected light into an electric signal and transmitting the electric signal to the processor so that the processor can generate a fingerprint image according to the electric signal.
However, due to the prism film, the fingerprint image may be segmented from the middle, thereby affecting the integrity of the fingerprint image, and thus making it difficult to complete the fingerprint recognition process.
Disclosure of Invention
The application provides a fingerprint identification module under LCD screen, LCD device and terminal equipment. Therefore, the integrity of the fingerprint image is ensured, and the smooth completion of the fingerprint identification process is further promoted.
In a first aspect, the application provides a fingerprint identification module under LCD screen, is applicable to the LCD screen that has backlight unit, fingerprint identification module under LCD screen includes: the projection of the first lens in the vertical direction is positioned at the edge area of the first optical sensor; the first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light on the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal which is used for generating a fingerprint image.
The generated fingerprint image can not be segmented from the middle, so that the integrity of the fingerprint image is ensured, and the smooth completion of the fingerprint identification process is further promoted.
Optionally, the fingerprint identification module under the LCD screen includes: the two first optical sensors and the two first lenses are in one-to-one correspondence; the backlight module comprises a first prism film, and two first optical sensors are arranged along the length direction of the first prism film.
The processor can generate fingerprint images corresponding to the electric signals through the electric signals obtained by the plurality of first optical sensors, and splice the fingerprint images, so that larger fingerprint images can be obtained, and fingerprint identification is facilitated.
Optionally, the backlight module further includes: the length direction of second prism membrane is orthogonal with the length direction of first prism membrane, and fingerprint identification module still includes under the LCD screen: the two second optical sensors and the two second lenses are in one-to-one correspondence; the two second optical sensors are arranged along the length direction of the first prism film, wherein one second optical sensor and one first optical sensor are arranged along the length direction of the second prism film, and the other second optical sensor and the other first optical sensor are arranged along the length direction of the second prism film.
The application provides a fingerprint identification module under LCD screen, this fingerprint identification module under LCD screen can include: the fingerprint sensor comprises two first lenses, two first optical sensors, two second lenses and two second optical sensors, wherein the two first optical sensors and the two optical sensors are used for respectively obtaining electric signals, a processor can generate fingerprint images corresponding to the electric signals, and the fingerprint images are spliced, so that larger fingerprint images can be obtained, and fingerprint identification is facilitated. In addition, the fingerprint identification module under the LCD screen is suitable for scenes with higher requirements on the brightness of the LCD screen.
In a second aspect, the application further provides a fingerprint identification module under LCD screen, which is applicable to an LCD screen with a backlight module, and the fingerprint identification module under LCD screen comprises: the first optical sensor and the first lens, the first lens is set up for first prism film slope, and the contained angle of first lens and first prism film is greater than 0 degrees and is less than 45 degrees. The first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light on the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal which is used for generating a fingerprint image.
The generated fingerprint image can not be segmented from the middle, so that the integrity of the fingerprint image is ensured, and the smooth completion of the fingerprint identification process is further promoted.
Optionally, the backlight module includes a first prism film, and the first optical sensor is disposed parallel to the first prism film.
Optionally, the first optical sensor is disposed parallel to the first lens.
Optionally, the fingerprint identification module under the LCD screen includes: the two first optical sensors and the two first lenses are in one-to-one correspondence; the two first optical sensors are arranged along the length direction of the first prism film.
The processor can generate fingerprint images corresponding to the electric signals through the electric signals obtained by the plurality of first optical sensors, and splice the fingerprint images, so that larger fingerprint images can be obtained, and fingerprint identification is facilitated.
Optionally, the backlight module further includes: the length direction of second prism membrane is orthogonal with the length direction of first prism membrane, and fingerprint identification module still includes under the LCD screen: the two second optical sensors and the two second lenses are in one-to-one correspondence; the two second optical sensors are arranged along the length direction of the first prism film, wherein one second optical sensor and one first optical sensor are arranged along the length direction of the second prism film, and the other second optical sensor and the other first optical sensor are arranged along the length direction of the second prism film.
The application provides a fingerprint identification module under LCD screen, this fingerprint identification module under LCD screen can include: the fingerprint sensor comprises two first lenses, two first optical sensors, two second lenses and two second optical sensors, wherein the two first optical sensors and the two optical sensors are used for respectively obtaining electric signals, a processor can generate fingerprint images corresponding to the electric signals, and the fingerprint images are spliced, so that larger fingerprint images can be obtained, and fingerprint identification is facilitated. In addition, the fingerprint identification module under the LCD screen is suitable for scenes with higher requirements on the brightness of the LCD screen.
In a third aspect, the present application provides an LCD device comprising: a backlight module with a first prism film and an LCD under-screen fingerprint recognition module as in the first aspect, the second aspect or the alternatives of the first aspect, the alternatives of the second aspect.
In a fourth aspect, the present application provides a terminal device, including: a processor and an LCD device according to the third aspect, wherein the processor is electrically connected to the LCD device.
Optionally, if the LCD device includes a plurality of first optical sensors and/or a plurality of second optical sensors, the processor is configured to generate a corresponding fingerprint image according to the electrical signal obtained by each of the first optical sensors or each of the second optical sensors, and splice the fingerprint images corresponding to each of the plurality of first optical sensors and/or the plurality of second optical sensors.
The application provides a fingerprint identification module, LCD device and terminal equipment under LCD screen, wherein, fingerprint identification module is applicable to the LCD screen that has backlight unit under the LCD screen, and fingerprint identification module includes under the LCD screen: the projection of the first lens in the vertical direction is positioned at the edge area of the first optical sensor; the first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light on the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal which is used for generating a fingerprint image. The generated fingerprint image can not be segmented from the middle, so that the integrity of the fingerprint image is ensured, and the smooth completion of the fingerprint identification process is further promoted.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of an LCD according to an embodiment of the present application;
FIG. 2 is a schematic view of a prism film and a portion of a prism film according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a fingerprint image according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an exemplary embodiment of an LCD module for fingerprint recognition;
FIG. 5 is a schematic diagram of a fingerprint image according to an embodiment of the present application;
FIG. 6 is a partial cross-sectional view of an LCD provided in an embodiment of the present application;
FIG. 7 is a partial cross-sectional view of an LCD provided in an embodiment of the present application;
FIGS. 8A-8C are partial schematic views of an LCD screen according to an embodiment of the present application;
fig. 9A to 9C are schematic diagrams of indication images according to an embodiment of the present application;
FIG. 10 is a schematic diagram showing the positional relationship of normal vectors of two prism films according to an embodiment of the present disclosure;
FIG. 11 is a schematic diagram of a fingerprint image according to an embodiment of the present application;
FIG. 12 is a top view of a lens and optical sensor provided in an embodiment of the present application;
fig. 13 is a flowchart of a fingerprint identification method according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented, for example, in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic cross-sectional view of an LCD screen according to an embodiment of the present application, where the LCD screen is cross-sectioned along a direction AB to obtain a cross-section of the LCD screen shown in fig. 1, and as shown in fig. 1, the LCD screen sequentially includes, from top to bottom: glass board 11, liquid crystal layer 12, backlight unit 13 and LCD screen fingerprint identification module 14 still include below glass board 11: the LED15, the LED15 is configured to emit light, and the backlight module 13 sequentially includes, from top to bottom: a prism film 131, a light-homogenizing film 132, a light guide plate 133, a reflecting film 134, and a steel plate 135. The prism film 131 functions to concentrate scattered light from a backlight source at an angle using refraction and total reflection principles. The fingerprint identification module 14 under the LCD screen sequentially comprises from top to bottom: the fingerprint sensor comprises a lens 141 and an optical sensor 142, wherein the lens 141 is used for receiving reflected light generated by a fingerprint and focusing the reflected light on the optical sensor 142, and the optical sensor 142 is used for converting the reflected light into an electric signal and transmitting the electric signal to the processor so that the processor generates a fingerprint image according to the electric signal.
However, typically the prism film specification is 90/50, i.e. the prism angle is 90 degrees and the prism period is 50 microns, the prism period referring to the distance between adjacent two prism peaks. Specifically, fig. 2 is a schematic diagram of a prism film and a part of the prism film according to an embodiment of the present application, as shown in fig. 2, the prism film is located above, the prism film is located below, the angle B is a prism angle, which may be equal to 90 degrees, and d is a prism period. Light entering the optical sensor at small angles is limited by the prismatic film structure, for example: as shown in fig. 2, according to the law of total reflection, the incident light of the substantially parallel prism can form a perpendicular emergent light to reach the optical sensor, however, since the incident light of the substantially parallel prism is difficult to realize, it is not realistic to form the perpendicular emergent light, and as shown in fig. 3, the phenomenon causes a fingerprint image to be divided from the middle, thereby affecting the integrity of the fingerprint image, and further making the fingerprint recognition process difficult to complete.
In order to solve the technical problem, the application provides an LCD (liquid crystal display) under-screen fingerprint identification module, an LCD device and terminal equipment.
The fingerprint identification module under the LCD screen is described in detail below:
the application provides a fingerprint identification module under LCD screen, wherein, as shown in fig. 1, this module is applicable to the liquid crystal display LCD screen that has backlight unit, fingerprint identification module under the LCD screen includes: a first optical sensor and a first lens located between the first optical sensor and the first prism film. The first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light on the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal which is used for generating a fingerprint image.
One possible design is: the projection of the first lens in the vertical direction is located at an edge region of the first optical sensor. Fig. 4 is a top view of the first lens and the first optical sensor according to an embodiment of the present application, as shown in fig. 4, it can be seen that the projection of the first lens 51 in the vertical direction is located in an edge area of the first optical sensor 52, and the size and shape of the edge area are not limited in this application. In the prior art, the projection of the first lens 51 in the vertical direction is located in the central region of the first optical sensor 52. As shown in fig. 3, this phenomenon causes a fingerprint image to be divided from the middle. However, fig. 5 is a schematic diagram of a fingerprint image provided in an embodiment of the present application, as shown in fig. 5, a projection of the first lens 51 in a vertical direction is located in a central area of the first optical sensor 52, and when the projection of the first lens 51 in the vertical direction is located in an edge area of the first optical sensor 52, the finally generated fingerprint image as shown in fig. 5 may eliminate a phenomenon that the fingerprint image is split from the middle.
Another possible design: the first lens is obliquely arranged relative to the first prism film, wherein the included angle between the first lens and the first prism film is 0-45 degrees, and the first optical sensor is parallel to the first prism film. Wherein the first lens is parallel to the first prism film in the prior art, in this application, since the first lens is disposed obliquely with respect to the first prism film, the fingerprint image as shown in fig. 5, which is finally generated, can eliminate the phenomenon that the fingerprint image is divided from the middle. Fig. 6 is a partial cross-sectional view of an LCD according to an embodiment of the present application, as shown in fig. 6, when the first lens 71 is disposed obliquely with respect to the first prism film 72, the included angle between the first lens 71 and the first prism film 72 ranges from 0 to 45 degrees, and the first optical sensor 73 is parallel to the first prism film 72, the finally generated fingerprint image as shown in fig. 5 may eliminate the division of the fingerprint image from the middle.
Yet another possible design is: the first lens is obliquely arranged relative to the first prism film, and the first optical sensor is parallel to the first lens, wherein the included angle between the first lens and the first prism film is 0-45 degrees. In this application, since the first lens is disposed obliquely with respect to the first prism film and the first optical sensor is disposed parallel to the first lens, that is, the first optical sensor is disposed obliquely with respect to the first prism film, the finally generated fingerprint image as shown in fig. 5 can eliminate the division of the fingerprint image from the middle. Fig. 7 is a partial cross-sectional view of an LCD according to an embodiment of the present application, as shown in fig. 7, when the first lens 81 is disposed obliquely with respect to the first prism film 82, the included angle between the first lens 81 and the first prism film 82 ranges from 0 to 45 degrees, and the first optical sensor 83 is parallel to the first prism film 82, the fingerprint image as shown in fig. 5 is finally generated in this case, which can eliminate the division of the fingerprint image from the middle.
In summary, the embodiment of the application provides a fingerprint identification module under LCD screen, fingerprint identification module under LCD screen includes: a first optical sensor and a first lens, the first lens being located between the first optical sensor and the first prism film; the projection of the first lens in the vertical direction is located in the edge area of the first optical sensor, or the first lens is obliquely arranged relative to the first prism film, and an included angle between the first lens and the first prism film is larger than 0 degree and smaller than 45 degrees. The generated fingerprint image can not be segmented from the middle, so that the integrity of the fingerprint image is ensured, and the smooth completion of the fingerprint identification process is further promoted.
Optionally, the fingerprint identification module under the LCD screen includes at least one first optical sensor and at least one first lens, where the at least one first optical sensor and the at least one first lens are in one-to-one correspondence.
In particular, in order to meet the demands of users, the LCD screen tends to be ultra-thin, so the under-LCD-screen fingerprint identification module needs to have the characteristic of ultra-thin, which means that the terminal device with the LCD screen cannot adjust a larger object distance to obtain a larger fingerprint image, and based on this, in the present application, the under-LCD-screen fingerprint identification module may include a plurality of first optical sensors and a plurality of first lenses, where the plurality of first optical sensors and the plurality of first lenses are in one-to-one correspondence. After each first optical sensor acquires the electrical signals, the processor processes each electrical signal to obtain a fingerprint image corresponding to each electrical signal, and further, the processor can splice a plurality of fingerprint images to obtain a final fingerprint image. For example: fig. 8A to 8C are partial schematic views of an LCD screen according to an embodiment of the present application, as shown in fig. 8A to 8C, the fingerprint identification module under the LCD screen includes: two first optical sensors 91 and two first lenses 92, the two first optical sensors 91 and the two first lenses 92 being in one-to-one correspondence; wherein the two first optical sensors 91 are arranged in the length direction of the first prism film 93. There are coincident incident rays of light from the two first lenses 92. It should be noted that the present application is not limited to two first optical sensors arranged along the length direction of the first prism film, for example: assuming that the two first optical sensors are regarded as two points, an angle between a straight line determined by the two points and a length direction of the first prism film may be greater than or equal to 0 degrees.
As shown in fig. 8A, the projection of the first lens 92 in the vertical direction is located at the edge region of the first optical sensor 91.
As shown in fig. 8B, the first lens 92 is disposed obliquely with respect to the first prism film 93, and the first optical sensor 91 is parallel to the first prism film 93, wherein an included angle between the first lens 92 and the first prism film 93 is greater than 0 degrees and less than 45 degrees.
As shown in fig. 8C, the first lens 92 is disposed obliquely with respect to the first prism film 93, and the first optical sensor 91 is parallel to the first lens 92, wherein an angle between the first lens 92 and the first prism film 93 is greater than 0 degrees and less than 45 degrees.
Further, fig. 9A to 9C are schematic diagrams of indication images provided in an embodiment of the present application, wherein fig. 9A relies on an electric signal generated by the first optical sensor 91 on the left side in fig. 8A, 8B or 8C to generate a fingerprint image. Fig. 9B relies on the electrical signal generated by the first optical sensor 91 on the right in fig. 8A, 8B or 8C, resulting in a fingerprint image. The fingerprint image shown in fig. 9C is an image obtained after the processor concatenates the fingerprint images shown in fig. 8A and 8B. The processor may use an existing image stitching technology, which is not described in this application.
To sum up, the application provides a fingerprint identification module under LCD screen, this fingerprint identification module under LCD screen can include: the fingerprint sensor comprises a plurality of first lenses and a plurality of first optical sensors, wherein the electrical signals are obtained through the plurality of first optical sensors, a processor can generate fingerprint images corresponding to the electrical signals, and the fingerprint images are spliced, so that larger fingerprint images can be obtained, and fingerprint identification is facilitated.
Further, if there is a scene requiring a high brightness of the LCD screen, the LCD screen may include two prism films. That is, the LCD further includes, on the basis of the above-described embodiments: the length direction of second prism membrane is orthogonal with the length direction of first prism membrane, and fingerprint identification module still includes under the LCD screen: the two second optical sensors and the two second lenses are in one-to-one correspondence; the two second optical sensors are arranged along the length direction of the second prism film.
Specifically, fig. 10 is a schematic diagram of a positional relationship between normal vectors of two prism films according to an embodiment of the present application, as shown in fig. 10, AB is a normal vector of a first prism film, and CD is a normal vector of a second prism film, where AB and CD are orthogonal, i.e., the first prism film and the second prism film are orthogonal. Fig. 11 is a schematic diagram of a fingerprint image provided in an embodiment of the present application, and as shown in fig. 11, the fingerprint image is obtained by: the reflected light generated by the fingerprint passes through prism films on two sides and enters a lens, the lens focuses the reflected light to an optical sensor corresponding to the prism, the optical sensor converts the reflected light into an electric signal and transmits the electric signal to a processor, and the processor processes the electric signal to obtain a fingerprint image shown in fig. 11.
Fig. 12 is a top view of a lens and an optical sensor according to an embodiment of the present application, as shown in fig. 12, it can be seen that a projection of a first lens 1301 in a vertical direction is located at an edge area of a first optical sensor 1302, and likewise, a projection of a second lens 1303 in a vertical direction is located at an edge area of a second optical sensor 1304. And two second optical sensors 1304 are arranged according to the length direction of the first prism film, two first optical sensors 1302 are arranged according to the length direction of the first prism film, one second optical sensor 1304 and one first optical sensor 1302 are arranged according to the length direction of the second prism film, and the other second optical sensor 1304 and the other first optical sensor 1302 are arranged according to the length direction of the second prism film.
To sum up, the application provides a fingerprint identification module under LCD screen, this fingerprint identification module under LCD screen can include: the fingerprint sensor comprises two first lenses, two first optical sensors, two second lenses and two second optical sensors, wherein the two first optical sensors and the two optical sensors are used for respectively obtaining electric signals, a processor can generate fingerprint images corresponding to the electric signals, and the fingerprint images are spliced, so that larger fingerprint images can be obtained, and fingerprint identification is facilitated. In addition, the fingerprint identification module under the LCD screen is suitable for scenes with higher requirements on the brightness of the LCD screen.
The present application also provides an LCD device, wherein the LCD device includes: backlight unit and LCD screen fingerprint identification module with first prism membrane, LCD screen fingerprint identification module includes: a first optical sensor and a first lens, the first lens being located between the first optical sensor and the first prism film; the first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light on the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal, and the electric signal is used for generating a fingerprint image.
One possible design is: the projection of the first lens in the vertical direction is located at an edge region of the first optical sensor.
Another possible design: the first lens is obliquely arranged relative to the first prism film, and the first optical sensor is parallel to the first prism film, wherein an included angle between the first lens and the first prism film is larger than 0 degree and smaller than 45 degrees.
In yet another possible design, the first lens is disposed obliquely with respect to the first prism film, and the first optical sensor is parallel to the first lens, wherein an angle between the first lens and the first prism film is greater than 0 degrees and less than 45 degrees.
Optionally, the fingerprint identification module under the LCD screen includes: the two first optical sensors and the two first lenses are in one-to-one correspondence; the two first optical sensors are arranged along the length direction of the first prism film.
Optionally, the LCD further includes: the second prism film, the length direction of second prism film with the length direction quadrature of first prism film, fingerprint identification module still includes under the LCD screen: the two second optical sensors and the two second lenses are in one-to-one correspondence; the two second optical sensors are arranged along the length direction of the first prism film, wherein one second optical sensor and one first optical sensor are arranged along the length direction of the second prism film, and the other second optical sensor and the other first optical sensor are arranged along the length direction of the second prism film.
In summary, the present application provides an LCD device, which includes the above fingerprint identification module under the LCD screen, and the content and effect thereof can refer to the corresponding embodiment of the fingerprint identification module under the LCD screen, which is not described herein.
The application also provides a terminal device, comprising: the LCD device comprises a processor and the LCD device, wherein the processor is electrically connected with the LCD device.
Optionally, if the LCD device includes a plurality of first optical sensors and/or a plurality of second optical sensors, the processor is configured to generate a corresponding fingerprint image according to the electrical signal obtained by each of the first optical sensors or each of the second optical sensors, and splice the fingerprint images corresponding to each of the plurality of first optical sensors and/or the plurality of second optical sensors.
In summary, the present application provides a terminal device, where the terminal device includes the above-mentioned fingerprint identification module under the LCD screen, and the content and effect thereof can refer to the embodiment corresponding to the fingerprint identification module under the LCD screen, which is not described herein.
Fig. 13 is a flowchart of a fingerprint identification method according to an embodiment of the present application, where an execution body of the method may be the terminal device or a processor in the terminal device, and the method is described below with the execution body of the method as the terminal device, where the terminal device includes: fingerprint identification module under LCD screen, this fingerprint identification module under LCD screen includes: the plurality of optical sensors and the plurality of lenses are in one-to-one correspondence, as shown in fig. 13, and the method comprises the following steps:
step S1401: and the terminal equipment acquires the electric signals obtained by the plurality of optical sensors.
Step S1402: and the terminal equipment processes each electric signal to obtain fingerprint images corresponding to each electric signal.
Step S1403: and the terminal equipment splices all the fingerprint images to obtain a final fingerprint image.
Step S1404: and the terminal equipment performs fingerprint identification according to the final fingerprint image.
Alternatively, before step S1403, the terminal device may perform distortion correction processing on the fingerprint image using the prior art, which is not limited in the manner of the distortion correction processing. In addition, the image stitching method and the fingerprint identification method are not limited.
In summary, the present application provides a fingerprint identification method, because the method is applied to a terminal device including the fingerprint identification module under an LCD screen, a phenomenon that a fingerprint image generated based on the method is segmented from the middle does not exist, thereby ensuring the integrity of the fingerprint image and further promoting the successful completion of the fingerprint identification process.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. The utility model provides a fingerprint identification module under LCD screen, is applicable to the liquid crystal display LCD screen that has backlight unit, its characterized in that, fingerprint identification module under LCD screen includes: a first optical sensor and a first lens, a projection of the first lens in a vertical direction being located at an edge region of the first optical sensor;
the first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light onto the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal which is used for generating a fingerprint image;
the fingerprint identification module under the LCD screen includes: the two first optical sensors and the two first lenses are in one-to-one correspondence;
the backlight module comprises a first prism film, and two first optical sensors are arranged along the length direction of the first prism film;
the backlight module further comprises: the second prism film, the length direction of second prism film with the length direction quadrature of first prism film, fingerprint identification module still includes under the LCD screen: the two second optical sensors and the two second lenses are in one-to-one correspondence;
the two second optical sensors are arranged along the length direction of the first prism film, wherein one second optical sensor and one first optical sensor are arranged along the length direction of the second prism film, and the other second optical sensor and the other first optical sensor are arranged along the length direction of the second prism film.
2. The utility model provides a fingerprint identification module under LCD screen, is applicable to the liquid crystal display LCD screen that has backlight unit, its characterized in that, fingerprint identification module under LCD screen includes: the first optical sensor and the first lens are obliquely arranged relative to the first prism film, and the included angle between the first lens and the first prism film is larger than 0 degree and smaller than 45 degrees;
the first lens is used for receiving reflected light generated by the fingerprint and focusing the reflected light onto the first optical sensor, and the first optical sensor is used for converting the reflected light into an electric signal which is used for generating a fingerprint image;
the fingerprint identification module under the LCD screen includes: the two first optical sensors and the two first lenses are in one-to-one correspondence;
the two first optical sensors are arranged along the length direction of the first prism film;
the backlight module further comprises: the second prism film, the length direction of second prism film with the length direction quadrature of first prism film, fingerprint identification module still includes under the LCD screen: the two second optical sensors and the two second lenses are in one-to-one correspondence;
the two second optical sensors are arranged along the length direction of the first prism film, wherein one second optical sensor and one first optical sensor are arranged along the length direction of the second prism film, and the other second optical sensor and the other first optical sensor are arranged along the length direction of the second prism film.
3. The module of claim 2, wherein the backlight module comprises a first prism film, and the first optical sensor is disposed parallel to the first prism film.
4. The module of claim 2, wherein the first optical sensor is disposed parallel to the first lens.
5. An LCD device, comprising: a backlight module having a first prism film and an LCD under-screen fingerprint recognition module as recited in any one of claims 1-4;
the backlight module further comprises: the second prism film, the length direction of second prism film with the length direction quadrature of first prism film, fingerprint identification module still includes under the LCD screen: the two second optical sensors and the two second lenses are in one-to-one correspondence;
the two second optical sensors are arranged along the length direction of the first prism film, wherein one second optical sensor and one first optical sensor are arranged along the length direction of the second prism film, and the other second optical sensor and the other first optical sensor are arranged along the length direction of the second prism film.
6. A terminal device, comprising: a processor and the LCD device of claim 5, the processor being electrically connected to the LCD device.
7. The terminal device of claim 6, wherein if the LCD device includes a plurality of first optical sensors and a plurality of second optical sensors, the processor is configured to generate a corresponding fingerprint image according to the electrical signals obtained by each of the first optical sensors and each of the second optical sensors, and splice the fingerprint images corresponding to each of the plurality of first optical sensors and the plurality of second optical sensors.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/072843 WO2020150926A1 (en) | 2019-01-23 | 2019-01-23 | Lcd in-screen fingerprint recognition module, lcd apparatus and terminal device |
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| Publication Number | Publication Date |
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| CN109863508A CN109863508A (en) | 2019-06-07 |
| CN109863508B true CN109863508B (en) | 2023-05-26 |
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| CN201980000120.2A Active CN109863508B (en) | 2019-01-23 | 2019-01-23 | Fingerprint identification module under LCD screen, LCD device and terminal equipment |
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| Country | Link |
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| CN (1) | CN109863508B (en) |
| WO (1) | WO2020150926A1 (en) |
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| EP3637305A4 (en) | 2018-08-15 | 2020-07-01 | Shenzhen Goodix Technology Co., Ltd. | Below-screen optical fingerprint recognition system, backlight module, display screen, and electronic device |
| CN109196522B (en) | 2018-08-24 | 2022-07-19 | 深圳市汇顶科技股份有限公司 | Backlight module, method and device for identifying fingerprints under screen and electronic equipment |
| CN111095274B (en) * | 2019-07-25 | 2023-10-24 | 深圳市汇顶科技股份有限公司 | Under-screen fingerprint identification module, LCD optical fingerprint identification system and electronic equipment |
| CN110503019A (en) * | 2019-08-16 | 2019-11-26 | 深圳阜时科技有限公司 | Optical detection apparatus |
| CN111108509B (en) * | 2019-08-08 | 2023-09-08 | 深圳市汇顶科技股份有限公司 | Fingerprint detection device and electronic equipment |
| CN112399045A (en) * | 2019-08-16 | 2021-02-23 | 印象认知（北京）科技有限公司 | A field-of-view imaging module and terminal equipment |
| CN110487515A (en) * | 2019-08-31 | 2019-11-22 | 深圳阜时科技有限公司 | A kind of optical detection apparatus and electronic equipment |
| CN211319247U (en) * | 2019-09-20 | 2020-08-21 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, backlight unit, liquid crystal display and electronic equipment |
| US10936847B1 (en) * | 2019-09-20 | 2021-03-02 | Shenzhen GOODIX Technology Co., Ltd. | Under-display optical sensor with compensated light paths |
| CN112749588B (en) * | 2019-10-30 | 2024-11-29 | 中兴通讯股份有限公司 | Display screen module and terminal |
| WO2021146965A1 (en) * | 2020-01-21 | 2021-07-29 | 深圳市汇顶科技股份有限公司 | Fingerprint detection device, backlight module, display screen, and electronic device |
| CN112580605B (en) * | 2020-12-31 | 2024-05-24 | 敦泰电子（深圳）有限公司 | Fingerprint image acquisition method and device, electronic equipment and storage medium |
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| CN109196522A (en) * | 2018-08-24 | 2019-01-11 | 深圳市汇顶科技股份有限公司 | Backlight module shields lower fingerprint identification method, device and electronic equipment |
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