CN209312028U - Optical lens, fingerprint recognition mould group and mobile terminal - Google Patents
Optical lens, fingerprint recognition mould group and mobile terminal Download PDFInfo
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- CN209312028U CN209312028U CN201822019566.5U CN201822019566U CN209312028U CN 209312028 U CN209312028 U CN 209312028U CN 201822019566 U CN201822019566 U CN 201822019566U CN 209312028 U CN209312028 U CN 209312028U
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Abstract
The utility model provides a kind of optical lens, fingerprint recognition mould group and mobile terminal.The optical lens of the utility model is arranged in the fingerprint recognition mould group of screen side, and optical lens is located in the optical path of the fingerprint image of reflector reflection, and optical lens includes shading piece, is used for the loophole of imaging on shading piece at least one.The optical lens of the utility model can be applied to common liquid crystals and show screen, so that common liquid crystals show that screen being capable of fingerprint technique under Application Optics screen.
Description
Technical Field
The utility model relates to a fingerprint identification technical field especially relates to an optical lens, fingerprint identification module and mobile terminal.
Background
Fingerprint identification unlocking has become a function equipped for most mobile terminals such as mobile phones and tablet computers, and currently, fingerprint identification technologies mainly include capacitive type, optical type and ultrasonic type. The capacitive fingerprint sensor is one of the most widely used sensors, and collects the finger line information of a user through a capacitive sensor placed below a panel. With the coming of the full screen era of mobile phones, capacitive sensors are gradually abandoned due to the difficulty in being placed below the screen, and the technical cost of the ultrasonic technology cannot be reduced in the initial development stage, so that the optical underscreen fingerprints are most popular in the application of underscreen fingerprints.
Since an organic light-emitting diode (OLED) screen can self-emit light, the screen thickness is thin, and the entire screen structure is made of a light-transmitting material, the conventional optical underscreen fingerprint recognition device is applied to the OLED screen. Specifically, light emitted by the OLED screen irradiates fingerprints of a user covered on a screen fingerprint unlocking area through a pixel gap, light reflected from the fingerprints forms fingerprint images by utilizing an optical element, the fingerprint images are conducted to an optical sensor below the screen, and the fingerprint images are collected and identified through the optical sensor.
However, due to the influence of the cost and the productivity of the OLED screen, the matched optical underscreen fingerprint cannot be widely popularized and applied, and therefore, the development of the optical fingerprint technology suitable for the common Liquid Crystal Display (LCD) screen is urgent.
SUMMERY OF THE UTILITY MODEL
The utility model provides an optical lens, fingerprint identification module and mobile terminal to realize the application of optical fingerprint at the LCD screen under the screen.
In a first aspect, the utility model provides an optical lens, optical lens set up in being located the fingerprint identification module of screen side, and optical lens are located the light path of the fingerprint image of reflector reflection, and optical lens includes the anti-dazzling screen, has at least one light trap that is used for the formation of image on the anti-dazzling screen.
Optionally, the optical lens further includes at least one lens for condensing light, the lens is disposed on the light shielding member and is disposed in one-to-one correspondence with the light transmitting holes, and an optical axis of the lens passes through the corresponding light transmitting hole.
Optionally, the lens is a convex lens.
Optionally, the lens is located at the light incident side of the light hole or the light emergent side of the light hole.
Optionally, the light incident side of the lens is a spherical surface, and the light emergent side is a plane; or,
the light-in side of the lens is a plane, and the light-out side of the lens is a spherical surface.
Optionally, the shading part comprises a light-permeable substrate layer and a shading layer for shading, and the shading layer covers one side surface of the substrate layer; the light hole is arranged on the light shielding layer.
Optionally, at least one side surface of the substrate layer is provided with a filter layer, and the filter layer is used for filtering light with a preset wavelength.
Optionally, the thickness of the substrate layer is between 100 and 500 microns.
Optionally, the diameter of the light transmission hole is between 100 and 500 microns.
Optionally, the thickness of the lens is between 10-30 microns.
Optionally, the number of the light holes is at least two;
wherein, at least two light holes are arranged in a stacking way in the incident direction of the light; and/or at least two light holes are arranged side by side in the light incidence direction.
The second aspect, the utility model provides a fingerprint identification module, fingerprint identification module are located screen side, the fingerprint identification module include fingerprint identification chip, reflector and as above optical lens, the reflector is used for reflecting the fingerprint image of screen surface reflection to optical lens to shine on the spigot surface of fingerprint identification chip behind optical lens.
Optionally, the fingerprint identification module still includes the light source, and the light source setting is in screen side for make the surface reflection fingerprint image of screen.
The third aspect of the present invention provides a mobile terminal, including the fingerprint identification module as described above.
The utility model discloses an optical lens, fingerprint identification module and mobile terminal, optical lens set up in the fingerprint identification module that is located screen side, and optical lens is located the light path of the fingerprint image of reflector reflection, and optical lens has at least one light trap that is used for the formation of image including shading the piece on shading the piece. Through the fingerprint image of the fingerprint of the screen top that sets up the optical lens receipt reflector reflection in the fingerprint identification module of screen side, the light-shielding piece in the optical lens can prevent the light path of fingerprint image and pass through to make the light of fingerprint image pass from the light trap, form the fingerprint image of clear handstand through the light trap, thereby make the fingerprint identification chip in the fingerprint identification module gather and discern fingerprint image. By arranging the optical lens at the side of the screen, the LCD screen which cannot self-illuminate and is thick and opaque can have the function of identifying the lower fingerprints of the optical screen.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, a brief description will be given below of the drawings required for the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention. For a person skilled in the art, without inventive effort, further figures can be obtained from these figures.
Fig. 1 is a schematic structural diagram of an optical lens according to a first embodiment of the present invention;
fig. 2 is a top view of an optical lens according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fingerprint identification module according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of a fingerprint identification module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a substrate layer according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second optical lens according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a third optical lens according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a fourth optical lens according to an embodiment of the present invention.
Description of reference numerals:
1-an optical lens; 11-a light-shielding member; 111-light hole; 112-a substrate layer; 113-a light-shielding layer; 114 — a filter layer; 12-a lens; 13-a visor; 2-a reflector; 3, fingerprint identification chip; 4-fingerprint identification module; 5-screen; 6-light source.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
With the coming of the full screen age of mobile phones, the application of the fingerprint under the screen is more and more extensive, wherein the optical fingerprint under the screen is the most popular. Due to the problems of screen thickness and screen structure, the current optical underscreen fingerprint technology can only be applied to OLED screens. The OLED screen has self-luminescence, the thickness of the screen is small, the whole screen structure is made of light-transmitting materials, and the fingerprint identification device can be arranged below the OLED screen. The fingerprint identification device comprises an optical element and an optical sensor, self-luminous light of the OLED screen can irradiate fingerprints above the screen through OLED pixel gaps, light reflected from the fingerprints can form fingerprint images through the optical element below the OLED screen, the fingerprint images are conducted to the optical sensor below the screen, and the fingerprint images are collected and identified through the optical sensor.
And traditional LCD screen can't self-luminous needs external light source, and because the structural film layer of LCD screen leads to the screen more thicker, its back needs to have the reverse screen of reflector panel with external light source's light, therefore the screen also can't be transparent, and the fingerprint identification module is difficult to set up in the below of LCD screen, and this a series of characteristics lead to optical screen fingerprint technique down can't use on the LCD screen. Compared with an LCD screen, the OLED screen has higher cost and lower productivity, so that the optical underscreen fingerprint technology matched with the OLED screen cannot be popularized and applied in a large area.
The problem to the unable ordinary LCD screen 5 of being applied to of fingerprint technique under the optical screen, the embodiment of the utility model provides an optical lens 1. Fig. 1 is a schematic structural diagram of an optical lens according to an embodiment of the present invention. As shown in fig. 1, the optical lens 1 is disposed in the fingerprint recognition module 4 located at the side of the screen 5, and the optical lens 1 is located on the light path of the fingerprint image reflected by the light emitter, the optical lens 1 includes a light shielding member 11, and the light shielding member 11 has at least one light hole 111 for imaging.
First, the optical lens 1 of the present embodiment is a part of the fingerprint recognition module 4, and the fingerprint recognition module 4 is disposed on the side of the screen 5, so as to overcome the problem that the fingerprint recognition module 4 should be disposed below the screen 5 and the fingerprint recognition module 4 is difficult to be disposed below the LCD screen 5. Utilize 2 reflectors of 5 sides of screen in the fingerprint identification module 4 to reflect the fingerprint image of the fingerprint reflection of 5 tops of screen, and optical lens 1 sets up on the light path of the fingerprint image of 2 reflections of reflectors, makes the fingerprint image formation of reflection reduce, clear fingerprint image's inverted image through optical lens 1, later, fingerprint image can shine to the induction surface of fingerprint identification chip 3 on, gather and discern fingerprint image through fingerprint identification chip 3.
Specifically, the optical lens 1 forms the fingerprint image into a reduced and clear fingerprint image through the light shielding member 11, and the light shielding member 11 is provided with a light hole 111 for imaging. Fingerprint image's light path is when through light-proof 11, and light-proof 11 other positions can prevent the passing through of light, and make light pass through in the light trap 111, and the light through light trap 111 forms the inverted image of diminishing, clear fingerprint image on optical lens 1 light-emitting side, so, utilizes light trap 111 in order to form and reduce and clear fingerprint image to fingerprint identification chip 3 gathers and discerns.
Further, the light-shielding member 11 has at least one light-transmitting hole 111 for imaging, and in general, one light-transmitting hole 111 may be provided, so that a reduced and clear fingerprint image may be formed; in the case that the fingerprint recognition module 4 has a sufficient space, the size of the light shielding member 11 can be increased, and a plurality of light transmission holes 111 can be formed in the light shielding member 11. Through setting up a plurality of light trap 111, every light trap 111 all can form a fingerprint image, and a plurality of fingerprint image overlap shine to fingerprint identification chip 3 after, the definition degree in every region of fingerprint image all can strengthen, can make fingerprint identification chip 3 change the collection and discern.
In order to enable the fingerprint image to form a clearer image after passing through the optical lens 1, the optical lens 1 of the present embodiment further includes at least one lens 12 for collecting light, the lens 12 is disposed on the light shielding member 11 and is disposed in one-to-one correspondence with the light transmission holes 111, and the optical axis of the lens 12 passes through the corresponding light transmission hole 111. Reflect the light path of the fingerprint image that returns from screen 5 and reflect to optical lens 1 through reflector 2, the light trap 111 through optical lens 1 forms and reduces, clear fingerprint image, and still be provided with lens 12 on light trap 111, lens 12 can further assemble the light path of the fingerprint image of formation, in order to form more reducing, clear fingerprint image more, can make fingerprint identification chip 3 quicker, sensitive collection and discernment are clear fingerprint image more, further improve the work efficiency and the precision of fingerprint identification module 4.
Fig. 2 is a top view of an optical lens according to an embodiment of the present invention. As shown in fig. 2, the optical axis of the lens 12 passes through the corresponding light-transmitting hole 111, that is, the center line of the lens 12 passes through the light-transmitting hole 111, thus, the fingerprint image reflected by the reflector 2 to the optical lens 1 will pass through the light hole 111 and the lens 12, whether the fingerprint image passes through the light hole 111 and then the lens 12 or passes through the lens 12 and then the light hole 111, the fingerprint image can form a reduced and clear fingerprint image after passing through the optical lens 1, so that the fingerprint image can be clearly and completely irradiated on the fingerprint identification chip 3, that is, the size of the fingerprint image reduced by the light hole 111 and the lens 12 can meet the requirement of the fingerprint identification chip 3, and the fingerprint image can be completely located in the sensing area of the fingerprint identification chip 3, so that the fingerprint identification chip 3 can acquire complete fingerprint information; moreover, the definition of the fingerprint image irradiated to the fingerprint identification chip 3 can also meet the requirement of the fingerprint identification chip 3, and the fingerprint image formed by the light-transmitting hole 111 and the lens 12 can clearly display specific lines, so that the fingerprint identification chip 3 can accurately identify the collected fingerprint image.
Further, the lens 12 may be a convex lens 12. The convex lens 12 is a common lens 12 with a thick middle part and a thin edge, the convex lens 12 of the embodiment can be a spherical surface with one surface as shown in fig. 1, the other surface is a plane, one side of the plane of the lens 12 is assembled with the light shielding member 11, the contact part between the light shielding member 11 and the lens 12 is also a plane, so that the lens 12 and the light shielding member 11 can be assembled into a whole easily; of course, the convex lens 12 of the present embodiment may have both surfaces made into spherical surfaces, and the surface shape of the light shielding body may be determined according to the specific surface shape of the side of the convex lens 12 contacting with the light shielding body, so that the light shielding body and the convex lens 12 can be matched. Specifically, when the surface shape of the convex lens 12 is selected, the light path formed between the fingerprint area of the screen 5, the reflector 2, the optical lens 1 and the fingerprint identification chip 3 is mainly used, so that the fingerprint image reflected by the reflector 2 can be irradiated onto the fingerprint identification chip 3 through the light transmission hole 111 of the optical lens 1 and the convex lens 12, the convex lens 12 can perform the function of condensing light to make the fingerprint image clearer, and the specific surface shape of the convex lens 12 is not limited.
The light trap 111 of optical lens 1 plays the effect of formation of image, lens 12 converges the light path of fingerprint image, the fingerprint image that makes the formation is more clear, can utilize light trap 111 to carry out the formation of image processing to the light path of fingerprint image earlier, pass through lens 12 after the formation of image and carry out further clarification processing to the fingerprint image, of course, also can converge through lens 12 earlier the light path of the fingerprint image of 2 reflections of reflector and make it more clear, later form through light trap 111 and reduce, clear fingerprint image. Therefore, the lens 12 of the present embodiment may be located on the light incident side of the light transmissive hole 111 or the light exiting side of the light transmissive hole 111.
Wherein, to the situation that the lens 12 is located the income light side of the light hole 111, fig. 3 is a schematic structural diagram of the fingerprint identification module provided by an embodiment of the present invention. As shown in fig. 3, the light path of the fingerprint image reflected from the reflector 2 to the optical lens 1 first passes through the lens 12, and after the lens 12 converges the light path to form a clear fingerprint image, the light path passes through the light hole 111 to form a reduced and clearer fingerprint image, and then the fingerprint image is irradiated to the fingerprint identification chip 3. For the situation that the lens 12 is located on the light emitting side of the light hole 111, fig. 4 is another schematic structural diagram of the fingerprint identification module according to an embodiment of the present invention. As shown in fig. 4, the light path of the fingerprint image reflected from the reflector 2 to the optical lens 1 passes through the light hole 111, passes through the light hole 111 to form a reduced and clear inverted image of the fingerprint image, then passes through the lens 12 to further reduce and clear the inverted image of the formed fingerprint image, and the fingerprint image formed after passing through the lens 12 is irradiated to the fingerprint identification chip 3.
Specifically, taking the planoconvex lens 12 of the present embodiment in which one surface of the lens 12 is a spherical surface and the other surface is a flat surface as an example, the contact surface between the light-shielding body and the lens 12 may be a flat surface, and the lens 12 and the light-shielding body may be assembled into a whole by the flat surface of the lens 12. The light inlet side of the lens 12 can be a spherical surface, and the light outlet side can be a plane; alternatively, the light incident side of the lens 12 may be a plane surface and the light emergent side may be a spherical surface. As shown in fig. 3, the lens 12 is located on the light incident side of the light hole 111, that is, the light path of the fingerprint image passes through the lens 12 and then passes through the light hole 111, and in addition, the plane of the lens 12 is attached to the light hole 111, and the spherical surface of the lens 12 deviates from the light shielding body, so that the light path of the fingerprint image passes through the spherical surface of the lens 12 and then passes through the plane thereof, that is, the light incident side of the lens 12 is spherical and the light emitting side is a plane; as shown in fig. 4, the lens 12 is located on the light exit side of the light hole 111, that is, the light path of the fingerprint image passes through the light hole 111 and then passes through the lens 12, and then passes through the lens 12 and the plane of the lens 12 attached to the light hole 111, and then passes through the spherical surface of the lens 12, that is, the light entrance side of the lens 12 is a plane and the light exit side is a spherical surface.
The light shielding member 11 of this embodiment is configured to prevent the light path of the fingerprint image reflected by the reflector 2 from passing through the rest of the light shielding member 11, and the rest of the light shielding member is configured to prevent light from passing through the rest of the light shielding member 11, so that the light path can pass through the light-transmitting hole 111 to form a reduced and clear fingerprint image. Specifically, the light shielding member 11 of the present embodiment may include a transparent substrate layer 112 and a light shielding layer 113 for shielding light, and the light shielding layer 113 covers one side surface of the substrate layer 112. Substrate layer 112 is a main supporting structure of optical lens 1, substrate layer 112 is light-permeable, and may be any transparent material with certain strength, such as crystal, glass, organic material, etc., substrate layer 112 does not prevent light from passing through, and light-shielding layer 113 for preventing light from passing through is further disposed on substrate layer 112.
Further, the light-transmitting hole 111 is disposed on the light-shielding layer 113. The light path of the fingerprint image needs to pass through the light hole 111 and then irradiate the fingerprint identification chip 3. When the light-transmitting hole 111 is provided in the base material layer 112, when the optical path passes through the optical lens 1, as shown in fig. 3 and 4, the optical path is blocked on the surface of the light-incident side light-shielding layer 113 due to the provision of the light-shielding layer 113 regardless of whether the optical path passes through the lens 12 first or the pinhole first. Therefore, the light-transmitting hole 111 is formed in the light-shielding layer 113, and when the light path passes through the light-shielding layer 113, the light path is blocked by other portions of the light-shielding layer 113, so that all the reflected light passes through the light-transmitting hole 111. Of course, the light-transmitting hole 111 may penetrate through the light-shielding layer 113 and the base material layer 112, and since the base material layer 112 is light-permeable, the light-transmitting hole 111 may or may not penetrate through the base material layer 112, and the light path may be irradiated to the fingerprint identification chip 3 through the light-transmitting hole 111. In order to ensure that the base material layer 112 has sufficient strength to support the entire optical lens 1, only the light-transmitting hole 111 may be provided on the light-shielding layer 113.
The fingerprint recognition chip 3 may be a fingerprint information that is collected and recognized by light of some other specific wave bands such as natural white light or infrared light, and then, the light of the fingerprint image that is irradiated to the fingerprint recognition chip 3 through the optical lens 1 should be light of the wave band that matches the light that can be collected and recognized by the fingerprint recognition chip 3. For the case that the light collected and identified by the fingerprint identification chip 3 is natural white light, the light-shielding body may only include the substrate layer 112 and the light-shielding layer 113, and the light passing through the light-shielding body may be natural white light.
For the case that the light of some specific wave bands such as infrared light is collected and identified by the fingerprint identification chip 3, other light of wave bands which cannot be collected and identified by the fingerprint identification chip 3 needs to be filtered. In response to this, the present inventors have conducted extensive studies on,
fig. 5 is a schematic structural diagram of a substrate layer according to an embodiment of the present invention. As shown in fig. 5, at least one side surface of the substrate layer 112 of the present embodiment may be provided with a filter layer 114, and the filter layer 114 is used for filtering light with a predetermined wavelength. The filter layer 114 disposed on the surface of the substrate layer 112 has a function of filtering light, so that light which cannot be collected and identified by the fingerprint chip cannot pass through the optical lens 1, and only light of a specific waveband matched with the fingerprint identification chip 3 is allowed to pass through the optical lens 1 through the filter layer 114.
Filter layer 114 may be disposed on only one surface of substrate layer 112, or filter layer 114 may be disposed on both surfaces of substrate layer 112, depending on the particular wavelength band of light desired. For example, if light with a wavelength band of more than 500 nm needs to pass through the optical lens 1, the light-shielding layer 113 for filtering light with a wavelength band of less than 500 nm needs to be disposed on the surface of one side of the substrate layer 112; if light with a wave band below 700 nanometers can pass through the optical lens 1, a light shielding layer 113 for filtering light with a wave band above 700 nanometers is only required to be arranged on the surface of one side of the base material layer 112; if light with a wavelength range of 500 nm to 700 nm is required to pass through the optical lens 1, a light-shielding layer 113 for filtering light with a wavelength range of 500 nm needs to be disposed on one surface of the substrate layer 112, and a light-shielding layer 113 for filtering light with a wavelength range of 700 nm or more needs to be disposed on the other surface of the substrate layer 112.
The optical lens 1 provided by the embodiment is mainly used for mobile terminals such as mobile phones and tablet computers, the sizes of the mobile terminals are smaller, and the optical lens 1 is arranged on the side of the screen 5, so that the size of the optical lens 1 is smaller than that of the mobile terminal, and the optical lens 1 can be matched with the mobile terminal. In this embodiment, the thickness of the substrate layer 112 may be between 100 and 500 microns, the substrate layer 112 is used as a main supporting member of the optical lens 1, and the thickness of the substrate layer 112 determines whether the optical lens 1 can be placed in the space at the side of the screen 5. Specifically, the thickness of the substrate layer 112 may be 200 micrometers, 300 micrometers, 400 micrometers, and the like, and the embodiment is not limited.
Also, the diameter of the light transmission hole 111 may be between 100 and 500 micrometers. On one hand, the diameter of the smaller light-transmitting hole 111 matches the overall size of the optical lens 1; on the other hand, the diameter of the light transmission hole 111 is small, and the fingerprint image formed through the light transmission hole 111 is smaller and clearer. Specifically, the diameter of the light-transmitting hole 111 may be 200 micrometers, 300 micrometers, 400 micrometers, and the like, and the embodiment is not limited.
The thickness of the lens 12 may be between 10-30 microns. The lens 12 and the light hole 111 are correspondingly arranged, the lens 12 is used for converging the light path of the fingerprint image reflected by the reflector 2, so that the fingerprint image formed after passing through the lens 12 is further reduced and clearer, the lens 12 needs to be arranged on the light path of the fingerprint image reflected by the reflector 2, and the light path of the fingerprint image converged by the lens 12 can be irradiated onto the fingerprint identification chip 3, so that the size, the position and the surface type of the lens 12 are determined according to the design requirement of the light path of the fingerprint image. Generally, the thickness of the lens 12 may be set between 10-30 microns according to the external dimension of the mobile terminal and the accommodation space at the side of the screen 5, specifically, the thickness of the lens 12 may be 15 microns, 20 microns, 25 microns, and the like, and the embodiment is not limited.
Fig. 6 is a schematic structural diagram of a second optical lens according to an embodiment of the present invention. Fig. 7 is a schematic structural diagram of a third optical lens according to an embodiment of the present invention. Fig. 8 is a schematic structural diagram of a fourth optical lens according to an embodiment of the present invention. In order to make the fingerprint image formed after passing through the optical lens 1 clearer and make the fingerprint image easier to be collected and identified by the fingerprint identification chip 3, the number of the light holes 111 can be at least two; wherein, at least two light holes 111 are stacked in the incident direction of the light; and/or at least two light transmission holes 111 are arranged side by side in the light incidence direction.
Specifically, as shown in fig. 6, three light transmission holes 111 are shown to be stacked in the incident direction of light, and the three light transmission holes 111 may be provided in three light-shielding members 11 stacked in layers, and each light transmission hole 111 is provided with a corresponding lens 12. In the light incident direction, after the light path of fingerprint image passes through first light trap 111 and lens 12, fingerprint image is dwindled and the definition, rethread second light trap 111 and lens 12, fingerprint image further dwindles and more clear, then rethread third light trap 111 and lens 12, fingerprint image further dwindles again and the definition to make fingerprint image after multistage reduction and definition, the fingerprint image that finally shines to fingerprint identification chip 3 has good definition. Of course, two light holes 111, four light holes 111, five light holes 111, etc. may be stacked, and only one of many possible embodiments is shown.
As shown in fig. 7, four light-transmitting holes 111 are arranged side by side in the light incidence direction, the four light-transmitting holes 111 may be arranged on one light-shielding member 11 at intervals, and a lens 12 is arranged on each light-transmitting hole 111. The light path of the fingerprint image reflected by the reflector 2 can enter the four light holes 111 and the lens 12 at the same time, each group of light holes 111 and the lens 12 can make one part of the fingerprint image clearer, for example, one group of light holes 111 and the lens 12 can make the left part of the upper half part of the fingerprint image clearer, the other group of light holes 111 and the lens 12 can make the left part of the lower half part of the fingerprint image clearer, the third group of light holes 111 and the lens 12 can make the right part of the upper half part of the fingerprint image clearer, and the fourth group of light holes 111 and the lens 12 can make the right part of the lower half part of the fingerprint image clearer. Thus, the fingerprint image irradiated to the fingerprint identification chip 3 can be a fingerprint image with good overall definition formed by the clear portions integrating the four sets of the light transmission holes 111 and the lens 12. Of course, two light holes 111, three light holes 111, five light holes 111, etc. may be arranged side by side, and only one of many possible embodiments is shown in the figures.
As shown in fig. 8, two layers of light holes 111 are stacked, wherein each layer of light holes 111 includes four light holes 111, and each light hole 111 is correspondingly provided with a lens 12. As previously mentioned, the light hole 111 and the lens 12 that stack up the setting in the light incidence direction can make the fingerprint image of formation more clear, and the light hole 111 and the lens 12 that set up side by side can make each part of fingerprint image more clear, and be as an organic whole with these two kinds of schemes combination, can make the whole definition through the fingerprint image of optical lens 1 final formation have showing the promotion, no longer describe repeatedly.
Specifically, in the case that the light holes 111 are stacked, that is, multiple layers of light-shielding members 11 are required to be stacked at intervals, and the light holes 111 and the lenses 12 are disposed on the light-shielding members 11, the multiple layers of light-shielding members 11 can be connected through the light-shielding plate 13, so as to prevent light from passing through the light holes 111 of the first layer of light-shielding members 11 and the lenses 12 to form a light path which cannot reach the light holes 111 and the lenses 12 of the following light-shielding members 11; in the case where a plurality of light-transmitting holes 111 and lenses 12 are provided in each layer of the light-shielding member 11, a light-shielding plate 13 may be provided between the adjacent light-transmitting holes 111 and lenses 12 so that the light path can pass straight from the light-transmitting hole 111 and lens 12 of the previous layer of the light-shielding member 11 through the light-transmitting hole 111 and lens 12 of the next layer of the light-shielding member 11.
It should be noted that, for some mobile terminals with smaller overall dimensions, such as mobile phones, the optical lens 1 with only one light hole 111 and one lens 12 may be disposed at the side of the screen 5, so as to form a reduced and clear fingerprint image; however, in some mobile terminals with larger external dimensions, such as tablet computers, the optical lens 1 having a plurality of light-transmitting holes 111 and lenses 12 arranged in a stacked and/or side-by-side manner may be disposed on the side of the screen 5, so as to improve the definition of the formed fingerprint image, and the embodiment is not particularly limited thereto. In addition, the lens 12 may not be disposed above the plurality of light transmission holes 111 which are stacked and/or juxtaposed, depending on the definition of the formed fingerprint image, and whether the lens 12 is disposed above the light transmission holes 111 may be determined according to whether the definition of the formed fingerprint image is sufficient for the fingerprint identification chip 3 to sense.
Example two
This embodiment provides a fingerprint identification module 4, and fingerprint identification module 4 is located screen 5 side, and fingerprint identification module 4 includes fingerprint identification chip 3, reflector 2 and embodiment one optical lens 1, reflector 2 are used for reflecting 5 surface reflection's of screen fingerprint image to optical lens 1 to shine on fingerprint identification chip 3's response face behind optical lens 1.
The fingerprint identification module 4 of the present embodiment can be applied to a conventional LCD screen 5. As shown in fig. 3 or fig. 4, fingerprint identification module 4 is located screen 5 side, fingerprint identification module 4 includes reflector 2, optical lens 1 and fingerprint identification chip 3, reflector 2 is used for reflecting to optical lens 1 with the light of the fingerprint reflection on screen 5 surface, optical lens 1 is used for making the light of the 2 reflection of reflector that receive form shrink, clear fingerprint image, shine fingerprint image to fingerprint identification chip 3's induction surface again on, gather and discern fingerprint image through fingerprint identification chip 3.
Specifically, as shown in fig. 3 or 4, when a finger of a user of the mobile terminal contacts the screen 5, light irradiates a fingerprint area of the finger contacting the screen 5 above the screen 5, a fingerprint image formed on the screen 5 is reflected to the reflector 2 through the finger, the fingerprint image is reflected to the optical lens 1 through the reflector 2, a light path formed by the fingerprint image forms a reduced and clear fingerprint image after passing through the light-transmitting hole 111 and the lens 12 of the optical lens 1, the fingerprint image irradiates an induction surface of the fingerprint identification chip 3 through the optical lens 1, and the fingerprint identification chip 3 collects and identifies the received fingerprint image.
Further, fingerprint identification module 4 can also include light source 6, and light source 6 sets up in screen 5 side for make the surface reflection fingerprint image of screen 5. As shown in fig. 3 or 4, the light source 6 is used to emit light and irradiate a fingerprint area above the screen 5 so that a fingerprint image formed on the screen 5 is reflected to the reflector 2 by a finger. In this embodiment, a complete light path is required to be formed among the light source 6, the finger above the screen 5, the reflector 2, the optical lens 1, and the fingerprint identification chip 3, so that the position and size of each component of the fingerprint identification module 4 can be determined according to the designed light path. In addition, the external light source 6 to LCD screen 5 is located the region of fingerprint identification module 4, and external light source 6 can form complete light path again with between other subassemblies of fingerprint identification module 4, finally can make fingerprint identification chip 3 gather and discern the fingerprint image, also can not set up light source 6 alone, and rely on the external light source 6 of LCD screen 5 self as the light source 6 of fingerprint identification module 4.
EXAMPLE III
The third embodiment provides a mobile terminal, which may be a mobile phone, a tablet computer, or the like, and the mobile terminal of the third embodiment includes the fingerprint identification module 4 of the second embodiment. Fingerprint identification module 4 is located screen 5 side, and fingerprint identification module 4 includes fingerprint identification chip 3, reflector 2 and embodiment one optical lens 1.
As shown in fig. 3 or fig. 4, fingerprint identification module 4 is located mobile terminal's screen 5 side, fingerprint identification module 4 can include light source 6, reflector 2, optical lens 1 and fingerprint identification chip 3, light source 6 is used for sending light and shines the fingerprint area of screen 5 top, reflector 2 is used for reflecting the light of the fingerprint reflection on screen 5 surface to optical lens 1, optical lens 1 is used for making the light of the reflection of received reflector 2 form and reduce, clear fingerprint image, shine fingerprint image on the induction surface of fingerprint identification chip 3 again, gather and discern fingerprint image through fingerprint identification chip 3.
Specifically, as shown in fig. 3 or 4, when a finger of a user of the mobile terminal contacts the screen 5, light irradiates a fingerprint area of the finger contacting the screen 5 above the screen 5, a fingerprint image formed on the screen 5 is reflected to the reflector 2 through the finger, the fingerprint image is reflected to the optical lens 1 through the reflector 2, a light path formed by the fingerprint image forms a reduced and clear fingerprint image after passing through the light-transmitting hole 111 and the lens 12 of the optical lens 1, the fingerprint image irradiates an induction surface of the fingerprint identification chip 3 through the optical lens 1, and the fingerprint identification chip 3 collects and identifies the received fingerprint image. And will not be described in detail.
The utility model discloses an optical lens, fingerprint identification module and mobile terminal, optical lens set up in the fingerprint identification module that is located screen side, and optical lens is located the light path of the fingerprint image of reflector reflection, and optical lens has at least one light trap that is used for the formation of image including shading the piece on shading the piece. Through the fingerprint image of the fingerprint of the screen top that sets up the optical lens receipt reflector reflection in the fingerprint identification module of screen side, the light-shielding piece in the optical lens can prevent the light path of fingerprint image and pass through to make the light of fingerprint image pass from the light trap, form the fingerprint image of clear handstand through the light trap, thereby make the fingerprint identification chip in the fingerprint identification module gather and discern fingerprint image. By arranging the optical lens at the side of the screen, the LCD screen which cannot self-illuminate and is thick and opaque can have the function of identifying the lower fingerprints of the optical screen.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (14)
1. The utility model provides an optical lens, its characterized in that, optical lens sets up in the fingerprint identification module that is located screen side, just optical lens is located the light path of the fingerprint image of reflector reflection, optical lens includes the piece that shades, it has at least one light trap that is used for the formation of image to shade.
2. An optical lens according to claim 1, further comprising at least one lens for condensing light, wherein the lens is disposed on the light shielding member and is disposed in one-to-one correspondence with the light-transmitting holes, and an optical axis of the lens passes through the corresponding light-transmitting hole.
3. An optical lens according to claim 2, characterized in that the lens is a convex lens.
4. An optical lens as claimed in claim 3, wherein the lens is located at the light entrance side of the light-transmissive hole or the light exit side of the light-transmissive hole.
5. An optical lens as claimed in claim 4, wherein the light incident side of the lens is spherical and the light emergent side is planar; or,
the light-in side of the lens is a plane, and the light-out side of the lens is a spherical surface.
6. The optical lens of any one of claims 1 to 5, wherein the light shielding member includes a light-permeable substrate layer and a light shielding layer for shielding light, the light shielding layer covering a side surface of the substrate layer; the light hole is arranged on the light shielding layer.
7. An optical lens according to claim 6, wherein at least one side surface of the substrate layer is provided with a filter layer for filtering light of a predetermined wavelength.
8. The optical lens as claimed in claim 6, wherein the thickness of the substrate layer is between 100 and 500 μm.
9. The optical lens as claimed in claim 6, wherein the diameter of the light hole is between 100 and 500 μm.
10. An optical lens as claimed in any one of claims 2 to 5, characterized in that the thickness of the lens is between 10 and 30 micrometres.
11. An optical lens barrel according to any one of claims 1 to 5, wherein the number of the light-transmitting holes is at least two;
at least two light holes are stacked in the light incidence direction; and/or at least two light holes are arranged side by side in the light incidence direction.
12. A fingerprint identification module, characterized in that, fingerprint identification module is located screen side, fingerprint identification module includes fingerprint identification chip, reflector and the optical lens of any one of claims 1-11, the reflector is used for with the fingerprint image reflection of screen surface to optical lens, and shine on the response face of fingerprint identification chip behind the optical lens.
13. The fingerprint identification module of claim 12, further comprising a light source disposed at a side of the screen for reflecting a fingerprint image from a surface of the screen.
14. A mobile terminal characterized by comprising the fingerprint recognition module of any one of claims 12-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822019566.5U CN209312028U (en) | 2018-12-04 | 2018-12-04 | Optical lens, fingerprint recognition mould group and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822019566.5U CN209312028U (en) | 2018-12-04 | 2018-12-04 | Optical lens, fingerprint recognition mould group and mobile terminal |
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| CN209312028U true CN209312028U (en) | 2019-08-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596931A (en) * | 2019-09-18 | 2019-12-20 | Oppo广东移动通信有限公司 | Display screen assembly and electronic equipment |
| WO2021051820A1 (en) * | 2019-09-22 | 2021-03-25 | 神盾股份有限公司 | Fingerprint sensing module and electronic device |
| CN113269012A (en) * | 2020-02-14 | 2021-08-17 | 北京小米移动软件有限公司 | Fingerprint identification device, display screen module, terminal equipment and fingerprint identification method |
-
2018
- 2018-12-04 CN CN201822019566.5U patent/CN209312028U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596931A (en) * | 2019-09-18 | 2019-12-20 | Oppo广东移动通信有限公司 | Display screen assembly and electronic equipment |
| WO2021051820A1 (en) * | 2019-09-22 | 2021-03-25 | 神盾股份有限公司 | Fingerprint sensing module and electronic device |
| CN113269012A (en) * | 2020-02-14 | 2021-08-17 | 北京小米移动软件有限公司 | Fingerprint identification device, display screen module, terminal equipment and fingerprint identification method |
| CN113269012B (en) * | 2020-02-14 | 2024-05-10 | 北京小米移动软件有限公司 | Fingerprint identification device, display screen module, terminal equipment and fingerprint identification method |
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