CN210166800U - Fingerprint identification system and electronic equipment - Google Patents
Fingerprint identification system and electronic equipment Download PDFInfo
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- CN210166800U CN210166800U CN201921489618.3U CN201921489618U CN210166800U CN 210166800 U CN210166800 U CN 210166800U CN 201921489618 U CN201921489618 U CN 201921489618U CN 210166800 U CN210166800 U CN 210166800U
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Abstract
The application discloses a fingerprint identification system and electronic equipment, wherein the fingerprint identification system is used for carrying out fingerprint identification on a liquid crystal display module with a backlight component; the liquid crystal display module is provided with a fingerprint identification area for placing a finger; the fingerprint identification system comprises: a transmitter for emitting an optical signal to the fingerprint identification area; the emitter is not obscured by the backlight component; the wavelength of the light emitted by the emitter is outside the wavelength range of the light emitted by the backlight component; a receiver for receiving a fingerprint identification signal; the receiver is shielded by the backlight assembly. This fingerprint identification system and electronic equipment can realize the fingerprint identification of screen liquid crystal display module assembly.
Description
Technical Field
The application relates to the field of fingerprint identification, in particular to a fingerprint identification system and electronic equipment.
Background
With the development of biometric technology, the underscreen fingerprint identification technology has been widely applied to portable mobile terminals such as mobile phones. At present, taking a mobile phone screen as an example, the method mainly includes the following steps according to different types of light sources: liquid Crystal Display (LCM for short) and Organic Light emitting diode (OLED for short) screens.
In order to improve the screen utilization rate and pursue a larger screen occupation ratio, the OLED screen has already realized a full screen fingerprint identification function. However, for LCM screens, a backlight is required for display because LCM is a passive light emitting mode. The backlight source is a light source positioned at the back of the liquid crystal display module, the luminous effect of the backlight source directly influences the visual effect of the liquid crystal display module, the backlight structure is complex, the noise is more, and the fingerprint identification of the liquid crystal display module is difficult to realize at present.
SUMMERY OF THE UTILITY MODEL
In view of the deficiencies of the prior art, it is an object of the present application to provide a fingerprint identification system for a liquid crystal display module.
In order to achieve at least one of the above purposes, the following technical scheme is adopted in the application:
a fingerprint identification system is used for carrying out fingerprint identification on a liquid crystal display module with a backlight component; the liquid crystal display module is provided with a fingerprint identification area for placing a finger; the fingerprint identification system comprises:
a transmitter for emitting an optical signal to the fingerprint identification area; the emitter is not obscured by the backlight component; the wavelength of the light emitted by the emitter is outside the wavelength range of the light emitted by the backlight component;
a receiver for receiving a fingerprint identification signal; the receiver is shielded by the backlight assembly.
As a preferred embodiment, the liquid crystal display module has a display area; the fingerprint identification area comprises a first area located in the display area; the receiver is aligned with the first area along a direction perpendicular to the liquid crystal display module.
As a preferred embodiment, the liquid crystal display module further has a non-display area; the emitter is occluded by the non-display area.
As a preferred embodiment, the fingerprint identification area further includes a second area located in the non-display area; the emitter is aligned with the second area along a direction perpendicular to the liquid crystal display module.
As a preferred embodiment, the backlight unit emits visible light, and the emitter emits invisible light; the second region is coated with an ink material that blocks visible light from passing through and allows infrared light to pass through.
In a preferred embodiment, the second region has an infrared light transmittance of 85% or more and a visible light transmittance of 1% or less.
As a preferred embodiment, the liquid crystal display module has a short side direction and a long side direction which are opposite; the length of the second region in the short side direction is between 6mm and 15 mm.
In a preferred embodiment, the receiver has a predetermined viewing angle region and the transmitter is located outside the predetermined viewing angle region.
In a preferred embodiment, the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate;
the receiver is positioned at the inner side of the backlight component and is shielded by the backlight component; the emitter is located between the outer cover plate and the backlight assembly.
In a preferred embodiment, the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate; the receiver is positioned at the inner side of the backlight component and is shielded by the backlight component;
and the projection of the emitter on the outer cover plate is positioned outside the projection of the backlight component on the outer cover plate along the direction vertical to the liquid crystal display module.
In a preferred embodiment, the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate; the emitter has a top facing the outer cover plate and a bottom facing away from the outer cover plate; the light emitting portion of the emitter is located at the top portion.
In a preferred embodiment, the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate; the emitter has a top facing the outer cover, a bottom remote from the outer cover, and a sidewall between the top and the bottom; the light emitting portion of the emitter is located on the sidewall.
As a preferred embodiment, the light emitting portion of the emitter faces the backlight unit.
In a preferred embodiment, the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate;
the liquid crystal display module is provided with a short side direction and a long side direction which are opposite; along the short side direction, the fingerprint identification area is arranged in the middle of the outer cover plate.
In a preferred embodiment, the non-display area is located at a side of the display area.
In a preferred embodiment, the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate; the liquid crystal display module is provided with a short side direction and a long side direction which are opposite; the non-display area is located at one end of the outer cover plate along the long side direction.
An electronic device, comprising:
a liquid crystal display module having a backlight unit;
a fingerprint identification system as described in any one of the above embodiments; the receiver of the fingerprint recognition system is shielded by the backlight component; the emitters of the fingerprint identification system are not obscured by the backlight component.
As a preferred embodiment, the electronic device comprises a mobile phone.
Has the advantages that:
the application provides a fingerprint identification system, which is characterized in that an emitter (for example, an infrared emitter) which is different from a wavelength range in which light emitted by a backlight component is positioned is arranged. The receiver and the emitter are matched to form a fingerprint identification system which is placed on the inner side of the liquid crystal display module. Since the light emitted from the emitter has a different wavelength band from the visible light emitted from the backlight unit, the receiver can deal with the light reflected from the finger in a targeted manner, and the light leaked from the backlight unit cannot affect the receiver, so that the surface condition of the finger can be reflected correctly. That is to say, this receiver can effectively gather the light that the finger reflects back, according to the distribution of light intensity, describes the position of the ridge and the valley of fingerprint to realize the fingerprint identification of screen liquid crystal display module.
Further, the receiver can be shielded by a backlight component. The receiver is located on the inner side of the display area, and therefore electronic equipment such as a mobile phone and the like can conveniently form a comprehensive screen structure. The emitter is not shielded by the backlight component, signals sent by the emitter cannot pass through liquid crystal display module components (such as color film glass and TFT glass) such as the backlight component, so that light intensity reaching the finger can be guaranteed, the returned fingerprint identification signals can still have better light intensity even passing through the color film glass, the TFT glass and the backlight component, and the wavelength of the fingerprint identification signals is different from the wavelength of light sent by the backlight component, so that the fingerprint identification signals received by the receiver can be guaranteed to have better intensity, clearer fingerprint valleys and ridges can be formed conveniently, fingerprint identification is realized, and the accuracy of the fingerprint identification is improved.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a front view of a display screen;
FIG. 2 is a schematic side view of the structure of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a front view of a liquid crystal display module employing a fingerprint identification system in an embodiment of the present application;
FIG. 5 is a schematic side view of the structure of FIG. 4;
FIG. 6 is an enlarged view of a portion of FIG. 5;
FIG. 7 is an enlarged view of a portion of a liquid crystal display module incorporating a fingerprint identification system according to another embodiment of the present application;
FIG. 8 is an enlarged view of a portion of a liquid crystal display module incorporating a fingerprint identification system according to another embodiment of the present application.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, a full-screen mobile phone is taken as an example, and has a display area 9, and a fingerprint recognition area 91 may be provided at a predetermined position of the display area 9, for example, at a middle lower portion of the display area 9. The fingerprint identification area 91 is used to match the finger 1, thereby collecting fingerprint information.
As shown in fig. 2 and 3, the conventional LCM panel requires a backlight for display. The backlight unit 4 can generate a strong light source, and the wavelength of visible light generated by the backlight unit 4 is about 380 to 780 nm. Most of the light passes through the color filter glass 2, the TET glass 3, and the outer cover 5 for display, and some of the light leaks from the back of the backlight unit 4 (e.g., a backlight panel). If a display portion light source is used, as shown in fig. 3, the thick solid line is the light reaching the finger 1, and the light reflected back through the finger 1 is represented by the thin solid line. Due to the absorption of the color film glass 2, the TET glass 3, the outer cover plate 5 and the finger 1, the intensity of the reflected light is weak, when the reflected light enters the backlight component 4 again, the light of the backlight component 4 is strong, the visible light leaked outwards can be used as noise light to reach the receiver 6, so that the sensor cannot determine which light is the signal light reflected by the finger 1, and the fingerprint identification function cannot be realized.
In the backlight unit 4, the side facing the outer cover 5 is the front side and the outside, and the side facing away from the outer cover is the rear side and the inside. Accordingly, in the embodiment of the present application, the fingerprint recognition area for the user's finger to touch is located on the outer side and the front side of the liquid crystal display module 8, and when two components (a component and B component) such as the a component is closer to the finger or the fingerprint recognition area than the B component, the a component is considered to be located on the front side and the outer side of the B component, and the B component is located on the rear side and the inner side of the a component.
In view of this, the present application provides a fingerprint identification system for a liquid crystal display module 8, which is used for realizing fingerprint identification for a passive light-emitting LCM screen (liquid crystal display module 8).
Referring to fig. 4, 5 and 6, an embodiment of the present application discloses a fingerprint identification system for performing fingerprint identification on a liquid crystal display module 8 having a backlight assembly 4. The liquid crystal display module 8 is provided with a fingerprint identification area for placing a finger. Specifically, the fingerprint identification system may include: a receiver 6 for receiving a fingerprint identification signal and a transmitter 7 for emitting an optical signal towards said fingerprint identification area.
The fingerprint identification system provided by the embodiment of the application is provided with the emitter 7 (for example, an infrared emitter) which is distinguished from the wavelength range of the light emitted by the backlight component 4. The receiver 6 and the emitter 7 are matched to form a fingerprint identification system and are placed on the inner side of the liquid crystal display module 8. Since the light (also referred to as an optical signal) emitted from the emitter 7 has a different wavelength band from the visible light emitted from the backlight 4, the receiver 6 can deal with the light reflected from the finger 1 in a targeted manner, and the light leaked from the backlight 4 cannot affect the receiver 6, so that the surface condition of the finger 1 can be reflected correctly. That is to say, this receiver 6 can effectively gather the light that the finger 1 reflects back, according to the distribution of light intensity, describes the position of the ridge and the valley of fingerprint to realize the fingerprint identification of screen liquid crystal display module 8.
Further, the receiver can be shielded by the backlight unit 4. The receiver 6 is located inside the display area 81, thereby facilitating the formation of a full screen structure for electronic devices such as mobile phones. The emitter 7 is not shielded by the backlight component 4, and signals sent by the emitter 7 cannot pass through liquid crystal display module 8 components (such as color film glass 2 and TFT glass 3) such as the backlight component 4, so that the light intensity reaching the finger can be ensured, the returned fingerprint identification signals can still have better light intensity even passing through the color film glass 2, the TFT glass 3 and the backlight component 4, and the wavelength of the fingerprint identification signals is different from the wavelength of light sent by the backlight component 4, so that the fingerprint identification signals received by the receiver 6 can be ensured to have better intensity, clearer fingerprint valleys and ridges can be formed conveniently, the fingerprint identification is realized, and the accuracy of the fingerprint identification is improved.
In the embodiment of the present application, the liquid crystal display module 8 has an outer cover 5. The receiver 6 and the transmitter 7 are both located inside the outer cover plate 5. The outer cover 5 protects its inner side such as the backlight unit 4, the emitter 7, and the receiver 6. The backlight assembly 4 is positioned inside the outer cover 5. Color film glass 2 and TFT glass 3 can be arranged between the outer cover plate 5 and the backlight component 4. The outer lid 5 has a short side direction F2 and a long side direction F1 opposite to each other. In the short side direction F2, the fingerprint identification area 83 is provided centrally on the outer cover 5. Along the long side direction F1, the fingerprint identification area 83 is disposed near one end of the outer cover 5. In the present embodiment, taking the longitudinal direction F1 as the vertical direction as an example, the fingerprint identification area 83 is located at the lower end of the outer cover 5.
In the embodiment shown in fig. 3 to 5, the liquid crystal display module 8 has a display area 81. The fingerprint identification area 83 comprises a first area 84 located in the display area 81. In order to facilitate the receiver 6 to receive the fingerprint identification signal, the receiver 6 is aligned with the first area 84 along a direction perpendicular to the direction V of the lcd module. The light signal (light) emitted by the emitter 7 passes through the first area 84 and directly reaches the finger, and is reflected by the finger to form a fingerprint identification signal, and the receiver 6 is positioned at the inner side of the first area 84, so that the light signal (fingerprint identification signal) reflected by the finger is received by the receiver 6 after passing through the first area 84.
In this embodiment, the liquid crystal display module 8 may further have a non-display area 82. The non-display region 82 is located on the display region 81 side and has an area much smaller than that of the display region 81. In the present embodiment, the non-display area 82 is located at one end of the outer lid 5 in the long side direction F1. Taking the longitudinal direction F1 as the vertical direction as an example, the non-display region 82 is located at the lower end of the outer lid 5. The non-display area 82 is located at a side of the display area 81. Wherein the emitter 7 may be occluded by the non-display area 82.
In this embodiment, the fingerprint identification area 83 further includes a second area 85 located in the non-display area 82. The emitter 7 is aligned with the second region 85 in a direction perpendicular to the liquid crystal display module direction V. In the present embodiment, the partial area of the non-display region 82 forms a partial region of the fingerprint identification region 83. In order to increase the amount of light reaching the fingerprint, enhance the fingerprint identification signal strength, and increase the fingerprint identification accuracy, the second region 85 allows the light emitted from the emitter 7 to pass through and blocks the light emitted from the backlight unit 4. Specifically, the backlight unit 4 emits visible light, and the emitter 7 emits non-visible light; the second region 85 is coated with an ink material that blocks visible light and allows infrared light to pass, such as IR transmissive ink.
Wherein the outer cover 5 has a transparent region and a non-transparent region. Wherein, the transparent region forms the display area 81 of liquid crystal display module 8, and the outside light leak of screen is avoided in the non-transparent region, guarantees that the user uses the experience. The outer cover 5 may be coated with a non-transparent material (e.g., an ink material) on the surface to form a non-transparent region. The non-display area 82 is black in color. The infrared transmittance of the second region 85 is 85% or more, and the visible light transmittance is 1% or less.
The non-light-transmitting material applied to the other portions of the non-display region 82 may be the same as the material of the second region 85, or may be a different material, and the application is not particularly limited. When the other areas of the non-display area 82 are different from the material applied to the second area 85, the color of the non-display area 82 is not visually different, so as to ensure the user experience. The liquid crystal display module 8 has a short side direction F2 and a long side direction F1 which are opposite; the length of the second region 85 in the short side direction F2 is between 6mm and 15 mm. The length of the second region 85 in the long side direction F1 is below 30mm in order to provide a larger display area 81, forming a full screen structure. When the second region 85 is an irregular region, the length is the maximum length in the F1 direction or the F2 direction.
The emitter 7 emits infrared light, the infrared light passes through the second area 85 and the first area 84 of the outer cover plate 5 and can directly reach finger positions, the infrared light forms reflection of different degrees at valley and ridge positions of finger fingerprints, the reflected light sequentially passes through the outer cover plate 5, the color film glass 2, the TFT glass 3 and the backlight component 4 to reach the receiver 6, the receiver 6 identifies infrared light intensity of different positions, and therefore the positions of the valley and the ridge of the imaging finger fingerprints are imaged, and identification of the finger fingerprints is achieved.
In the embodiment of the application, the infrared light emitted by the emitter 7 does not pass through the color filter glass 2, the TFT glass 3, the backlight component 4 and other components when reaching the finger, so that the loss of the infrared light is reduced, and the situation of interference caused by secondary reflection of the backlight component 4, the color filter glass 2 and the TFT glass 3 does not exist, so that the success probability of fingerprint identification can be obviously improved. In addition, because the emitter 7 adopts infrared light and the LCM displays visible light, the visible light leaked to the back side by the backlight component 4 does not influence the imaging effect of the receiver 6, and the accuracy of fingerprint identification under the LCM is further ensured.
In this embodiment, the transmitter 7 is closer to the outer cover 5 than the receiver 6, and correspondingly, the transmitter 7 is closer to the fingerprint identification area 83 than the receiver 6, so that the components through which the emitted light signal passes are reduced, and the light intensity loss is less. Specifically, along a direction perpendicular to the liquid crystal display module V, a projection of the emitter 7 on the outer cover plate 5 is located outside a projection of the backlight component 4 on the outer cover plate 5. The emitters 7 are located circumferentially outside the backlight unit 4.
Of course, the location of the emitter 7 is not limited to being located on the circumferential outer side of the backlight unit 4, and in another embodiment as shown in fig. 8, the receiver 6 is located on the inner side of the backlight unit 4 and is shielded by the backlight unit 4; the emitter 7 is located between the outer cover 5 and the backlight assembly 4. Wherein the emitter 7 is located between the side of the backlight unit 4 and the emitter 7. At this time, the projection of the emitter 7 on the outer cover 5 is located inside or partially overlapped with the projection of the backlight assembly 4 on the outer cover 5.
In the present embodiment, the emitter 7 has a top facing the outer cover 5, a bottom facing away from the outer cover 5, and a sidewall between the top and the bottom; the light emitting portion of the emitter 7 is located on the side wall. This can reduce the requirement for shielding the emitter 7, for example, the area for shielding the emitter 7 in this embodiment may be a transparent area or a non-transparent area, and the non-transparent area (the non-display area 82) may not be required to allow the transmission of the invisible light. Of course, in order to increase the signal strength of the fingerprint identification signal, it is preferable that the second region 85 allows the non-visible light to pass through. Further, the light emitting portion of the emitter 7 faces the backlight unit 4.
The present application is also not limited to embodiments in which the light-emitting surface 71 is located on a side wall. In another embodiment, as shown in fig. 7, 8, the emitter 7 has a top facing the outer cover plate 5 and a bottom facing away from the outer cover plate 5. The light emitting face 71 of the emitter 7 is located at the top. In this embodiment, the second region 85 allows transmission of non-visible light, in which case the light emitted by the emitter 7 is transmitted through both the second region 85 and the first region 84.
In this embodiment, the light emitted by the emitter 7 corresponds to a wavelength outside the wavelength range of the light emitted by the backlight unit 4. The wavelength of the visible light emitted by the backlight component 4 is 380-780 nm, and the light emitted by the emitter 7 can be infrared light. That is, the emitter 7 may be an infrared emitter 7, and the peak wavelength value of the infrared light emitted by the emitter 7 is 940nm, and the half-wavelength width is less than or equal to 50 nm. When the emitter 7 is an infrared emitter, the emitter 7 may be specifically an infrared light emitting diode.
The receiver 6 is used for processing the signal light reflected by the finger 1. In particular, the receiver 6 may comprise a camera. As shown in fig. 5, the receiver 6 can form a predetermined viewing angle area. In order to prevent interference problems between the transmitter 7 and the receiver 6, the transmitter 7 is arranged outside the predetermined viewing angle area formed by the receiver 6. That is, the transmitter 7 is disposed outside the predetermined viewing angle area of the receiver 6. The specific range of the predetermined viewing angle area differs according to the type of the receiver 6, performance parameters, and the like, and the present application is not limited thereto. In other embodiments, the receiver 6 may be a fingerprint recognition chip that converts an optical signal into an electrical signal.
In one embodiment, taking the receiver 6 as a camera as an example, the camera has a certain viewing angle area. Specifically, the viewing angle area is different according to different parameters such as a lens size and a viewing angle of the camera, and the application is not limited in this respect. In order to prevent the camera from interfering with the emitter 7, the emitter needs to be mounted at least outside the predetermined field of view formed by the camera.
In this description, the receiver 6 has a top portion close to the backlight unit 4 and a bottom portion relatively far from the backlight unit 4.
The receiver 6 has a certain outer dimension, for example, taking the receiver 6 as a camera with a certain radius dimension. When the top of the receiver 6 is in the same plane as the light emitting surface 71 of the transmitter 7, the radius of the predetermined viewing angle area is equal to the radius of the camera. In order to avoid interference between the emitter 7 and the camera, the emitter 7 is arranged at least outside the circular area formed by the radius of the camera. In addition, the transmitter 7 needs to correspond to the fingerprint recognition area 91. Generally, the size of the human finger 1 is within a certain fluctuation range, and the radius is not more than 11 mm. Accordingly, the distance between the emitter 7 and the center of the camera can be controlled within 11 mm. Specifically, when the radius of the camera is 4 mm, the distance from the emitter 7 to the center of the camera is not less than 4 mm and not more than 11 mm.
In the present embodiment, the transmitter 7 is an infrared transmitter (for example, an IR LED), and the receiver 6 is a camera, for example. The infrared emitters are distributed on one side of the receiver 6 and are positioned outside the preset visual angle area of the receiver 6, and the camera and the infrared emitters are matched to form a fingerprint identification system and are placed on the inner side of the backlight component 4 of the liquid crystal display module 8. Since the infrared light emitted from the infrared emitter has a different wavelength band from the visible light emitted from the backlight unit 4, the receiver 6 can specifically process the infrared light reflected from the finger 1, and the visible light leaked from the backlight unit 4 cannot affect the receiver 6, so that the surface condition of the finger 1 can be correctly reflected. That is to say, this receiver 6 can effectively gather the infrared light that the finger 1 reflects back, according to the distribution of light intensity, describes the position of the ridge and the valley of fingerprint to realize the fingerprint identification of screen liquid crystal display module 8.
In the embodiment of the present application, the emitter 7 may specifically be an infrared LED, or an IR LED, an infrared light emitting diode. The receiver 6 may be a camera. During specific installation, the infrared light emitting diode can be Printed on an FPC (Flexible Printed Circuit) to form an FPCA assembly (Flexible Printed Circuit assembly FPCA which is FPC element soldering tin or assembly, the FPCA assembly is fixed on a support or a whole machine middle frame, and the camera is fixed on the support or the whole machine middle frame from the bottom and is connected to a main board through the FPC.
Based on the same concept, the embodiment of the present invention further provides an electronic device, as described in the following embodiments. Because the principle of the electronic device for solving the problems and the technical effect which can be obtained are similar to those of the fingerprint identification system, the implementation of the electronic device can refer to the implementation of the fingerprint identification system, and repeated parts are not repeated.
Please continue to refer to fig. 4 to 8. Another embodiment of the present application provides an electronic device, including: a liquid crystal display module 8 having a backlight unit 4; a fingerprint identification system as claimed in any one of the above embodiments. The receiver 6 of the fingerprint recognition system is shielded by the backlight component 4; the light source of the fingerprint recognition system is not shielded by the backlight component 4. Wherein the electronic device comprises a mobile phone. Of course, the electronic device may also be an electronic device such as a card punch, a smart watch, and the like, and the application is not limited uniquely.
It should be noted that the electronic device provided in the present embodiment may have any suitable conventional configuration, such as a power supply portion, a fingerprint recognition signal processing portion, and other portions (e.g., a housing portion and an image pickup portion). For clearly and briefly explaining the technical solution provided by the present embodiment, the above parts will not be described again, and the drawings in the specification are also simplified accordingly. It should be understood, however, that the present embodiments are not limited in scope thereby.
Any numerical value recited herein includes all values from the lower value to the upper value, in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed inventive subject matter.
Claims (18)
1. A fingerprint identification system is characterized in that the fingerprint identification system is used for carrying out fingerprint identification on a liquid crystal display module with a backlight component; the liquid crystal display module is provided with a fingerprint identification area for placing a finger; the fingerprint identification system comprises:
a transmitter for emitting an optical signal to the fingerprint identification area; the emitter is not obscured by the backlight component; the wavelength of the light emitted by the emitter is outside the wavelength range of the light emitted by the backlight component;
a receiver for receiving a fingerprint identification signal; the receiver is shielded by the backlight assembly.
2. The fingerprint identification system of claim 1, wherein the liquid crystal display module has a display area; the fingerprint identification area comprises a first area located in the display area; the receiver is aligned with the first area along a direction perpendicular to the liquid crystal display module.
3. The fingerprint identification system of claim 2, wherein the liquid crystal display module further has a non-display area; the emitter is occluded by the non-display area.
4. The fingerprint recognition system of claim 3, wherein said fingerprint recognition area further comprises a second area located in said non-display area; the emitter is aligned with the second area along a direction perpendicular to the liquid crystal display module.
5. The fingerprint recognition system of claim 4, wherein the backlight assembly emits visible light and the emitter emits non-visible light; the second region is coated with an ink material that blocks visible light from passing through and allows infrared light to pass through.
6. The fingerprint identification system of claim 4 or 5, wherein the second region has an infrared transmittance of 85% or more and a visible transmittance of 1% or less.
7. The fingerprint identification system of claim 4, wherein the liquid crystal display module has opposite short and long side directions; the length of the second region in the short side direction is between 6mm and 15 mm.
8. The fingerprint identification system of claim 1, wherein said receiver has a predetermined field of view, and said transmitter is located outside said predetermined field of view.
9. The fingerprint identification system of claim 1, wherein the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate;
the receiver is positioned at the inner side of the backlight component and is shielded by the backlight component; the emitter is located between the outer cover plate and the backlight assembly.
10. The fingerprint identification system of claim 1, wherein the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate; the receiver is positioned at the inner side of the backlight component and is shielded by the backlight component;
and the projection of the emitter on the outer cover plate is positioned outside the projection of the backlight component on the outer cover plate along the direction vertical to the liquid crystal display module.
11. The fingerprint identification system of claim 1, wherein the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate; the emitter has a top facing the outer cover plate and a bottom facing away from the outer cover plate; the light emitting portion of the emitter is located at the top portion.
12. The fingerprint identification system of claim 1, wherein the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate; the emitter has a top facing the outer cover, a bottom remote from the outer cover, and a sidewall between the top and the bottom; the light emitting portion of the emitter is located on the sidewall.
13. The fingerprint recognition system of claim 12, wherein the light emitting portion of the emitter faces the backlight assembly.
14. The fingerprint identification system of claim 1, wherein the liquid crystal display module has an outer cover plate; the backlight component is positioned at the inner side of the outer cover plate;
the liquid crystal display module is provided with a short side direction and a long side direction which are opposite; along the short side direction, the fingerprint identification area is arranged in the middle of the outer cover plate.
15. The fingerprint recognition system of claim 3, wherein said non-display area is located at a side of said display area.
16. The fingerprint identification system of claim 15, wherein the lcd module has an outer cover; the backlight component is positioned at the inner side of the outer cover plate; the liquid crystal display module is provided with a short side direction and a long side direction which are opposite; the non-display area is located at one end of the outer cover plate along the long side direction.
17. An electronic device, comprising:
a liquid crystal display module having a backlight unit;
a fingerprint recognition system as claimed in any one of claims 1 to 16; the receiver of the fingerprint recognition system is shielded by the backlight component; the emitters of the fingerprint identification system are not obscured by the backlight component.
18. The electronic device of claim 17, wherein the electronic device comprises a cell phone.
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| CN201921489618.3U CN210166800U (en) | 2019-09-09 | 2019-09-09 | Fingerprint identification system and electronic equipment |
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| CN201921489618.3U CN210166800U (en) | 2019-09-09 | 2019-09-09 | Fingerprint identification system and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110458153A (en) * | 2019-09-09 | 2019-11-15 | 上海思立微电子科技有限公司 | Fingerprint recognition system and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110458153A (en) * | 2019-09-09 | 2019-11-15 | 上海思立微电子科技有限公司 | Fingerprint recognition system and electronic equipment |
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