CN211319238U

CN211319238U - Fingerprint identification device, backlight unit, display screen and electronic equipment

Info

Publication number: CN211319238U
Application number: CN202020137564.0U
Authority: CN
Inventors: 刘凯; 高贤禄; 熊峰
Original assignee: Shenzhen Goodix Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-08-21
Anticipated expiration: 2030-01-21

Abstract

The application provides a fingerprint identification device, backlight unit, display screen and electronic equipment, at the setting in-process of light filling light source, need not to increase electronic equipment complete machine chin width, can promote optical fingerprint identification's under the LCD screen performance simultaneously. The fingerprint identification device in this application is applied to the electronic equipment who has the LCD screen, and this LCD screen includes backlight unit, and this fingerprint identification device includes: the fingerprint identification module is used for receiving an optical signal which is sent by a light supplement light source in at least one light supplement packaging body, irradiates a human finger, returns back and passes through the backlight module so as to acquire a fingerprint image of the human finger; the backlight module comprises a backlight module, at least one light supplementing packaging body and a backlight module, wherein the at least one light supplementing packaging body is arranged in the backlight lamp bar of the backlight module, the backlight lamp bar comprises a plurality of backlight packaging bodies and the at least one light supplementing packaging body, and the backlight packaging body comprises a backlight light source for the display of the LCD screen.

Description

Fingerprint identification device, backlight unit, display screen and electronic equipment

Technical Field

The embodiment of the utility model provides a fingerprint identification field under the screen is related to, and more specifically relates to a fingerprint identification device, backlight unit, display screen and electronic equipment.

Background

A Liquid Crystal Display (LCD) screen includes a backlight module and a Liquid Crystal panel, in which the backlight module provides a uniform light source for the screen, and the Liquid Crystal panel plays a role of image Display. Optical fingerprint identification scheme is in order to realize optical fingerprint identification with fingerprint identification module setting in backlight unit's below under the screen based on LCD screen, and wherein, optical fingerprint identification is realized to the fingerprint identification module based on outside light filling light source. At present, the light supplement light source can be set in two ways as follows: the method comprises the steps that a light supplementing light source is welded on a flexible circuit board to be assembled into a light bar, and then the light bar is bonded on the side wall of a middle frame at the bottom of a cover plate of a display screen module; the second method comprises the following steps: the light supplementing light source is welded on the flexible circuit board to be assembled into a light bar, holes are dug in the corresponding positions of the backlight iron frame of the backlight module, and then the light bar is arranged below the backlight iron frame of the backlight module. However, in the first method, the width of the light bar needs to be increased to increase the chin width of the electronic device (such as a mobile phone), and the requirement of high screen ratio of the electronic device cannot be met. To above-mentioned mode two, the light that the light source sent passes the backlight unit membrane material earlier, reachs the finger after passing the liquid crystal display panel again, and the light intensity attenuation is great, and partial light easily directly gets into the sensor simultaneously and leads to the light leak, influences fingerprint identification performance.

SUMMERY OF THE UTILITY MODEL

The application provides a fingerprint identification device, backlight unit, display screen and electronic equipment, at the setting in-process of light filling light source, need not to increase the electronic equipment complete machine chin width to satisfy the high screen of electronic equipment and account for the ratio requirement, can satisfy fingerprint identification module light filling and backlight unit simultaneously and show the requirement, promote optical fingerprint identification's under the LCD screen performance.

In a first aspect, a fingerprint identification device is provided for an electronic device having an LCD screen, the LCD screen includes a backlight module, the fingerprint identification device includes:

the fingerprint identification module is used for receiving an optical signal which is sent by a light supplement light source in at least one light supplement packaging body, irradiates a human finger, returns back and passes through the backlight module so as to acquire a fingerprint image of the human finger;

the at least one light supplement package body is arranged in a backlight lamp bar of the backlight module, the backlight lamp bar comprises a plurality of backlight package bodies and the at least one light supplement package body, and the backlight package bodies comprise backlight light sources for display of the LCD screen.

In some possible implementation manners, the light supplement package body is formed by sealing a plurality of light supplement light sources, or the light supplement package body is formed by sealing at least one light supplement light source and a backlight light source.

In some possible implementation manners, the light supplement package body is obliquely arranged in a backlight light bar of the backlight module relative to the LCD screen to emit oblique light for illuminating a fingerprint detection area.

In some possible implementation manners, the inclination angle of the light supplement packaging body relative to the LCD screen is theta, and theta is larger than or equal to 30 degrees.

In some possible implementation manners, the backlight module includes a backlight iron frame, wherein a part of the backlight iron frame forms an inclined structure relative to the LCD screen, and the light supplement package is fixed to the inclined structure formed by the backlight iron frame.

In some possible implementation manners, the backlight iron frame partially forms an inclined structure with an inclination angle theta relative to the LCD screen, and the angle theta is larger than or equal to 30 degrees.

In some possible implementations, θ ≦ 60.

In some possible implementation manners, the light supplement package body includes a first package surface and a second package surface, where the first package surface is an upper surface of the light supplement package body after being obliquely disposed, the second package surface is a side surface of the light supplement package body perpendicular to the first package surface after being obliquely disposed, an angle between the first package surface and a light exit direction of a light supplement light source in the light supplement package body is θ, and an angle between the second package surface and the light exit direction of the light supplement light source in the light supplement package body is 90- θ.

In some possible implementation manners, a minimum distance between the light supplement light source in the light supplement package body and the first package surface in a first direction is in a range of 0.05mm to 0.1mm, and the first direction is perpendicular to the first package surface.

In some possible implementation manners, the light supplement package body is attached to the light guide plate in the backlight module through the second package surface.

In some possible implementation manners, the at least one light supplement package and the plurality of backlight packages are soldered on a flexible circuit board to form the backlight light bar in an assembled manner, wherein the backlight light bar is interconnected with at least one of the fingerprint identification module, the screen flexible circuit board, and the motherboard of the electronic device through a connector or a gold finger on the flexible circuit board.

In some possible implementation manners, the at least one light supplement package is located in the middle of the backlight light bar, and the plurality of backlight packages are located on two sides of the at least one light supplement package.

In some possible implementations, the number of fill-in light sources in the at least one fill-in package is greater than or equal to 3.

In some possible implementations, a spacing between a backlight prism film in the backlight module and a polarizer in the LCD panel is greater than or equal to 0.2 mm.

In some possible implementation manners, the light supplement light source in the light supplement package body is a near-infrared light source.

In some possible implementation manners, the light shielding glue on the light path through which the near-infrared light emitted by the near-infrared light source in the light compensation package passes is made of a near-infrared light-transmitting material.

In some possible implementations, the near-infrared transmittance of the near-infrared light-transmitting material is greater than or equal to 80%.

In some possible implementations, the fingerprint identification module includes:

a fingerprint sensor for receiving an optical signal to be returned from the human finger to acquire a fingerprint image of the human finger;

and the optical assembly is arranged above the pixels of the fingerprint sensor and used for guiding the optical signals returned from the human finger to the pixels of the fingerprint sensor so as to perform optical fingerprint detection.

In a second aspect, a backlight module is provided, which includes: the backlight module comprises a backlight lamp bar, a light compensation module and a light source module, wherein the backlight lamp bar comprises a plurality of backlight packaging bodies and at least one light compensation packaging body, the backlight packaging bodies comprise backlight light sources for Liquid Crystal Display (LCD) screen display, the light compensation packaging bodies at least comprise light compensation light sources for fingerprint detection, and a fingerprint identification module is arranged below the backlight module to realize optical fingerprint detection under a screen;

the light signal sent by the light supplement light source in the at least one light supplement packaging body and returned after irradiating the human finger penetrates through the backlight module to be transmitted to the fingerprint identification module, and the light signal is used for acquiring a fingerprint image of the human finger.

In some possible implementations, the method further includes: the backlight iron frame is locally formed into an inclined structure relative to the LCD screen, and the light supplement packaging body is fixed on the inclined structure formed by the backlight iron frame.

In some possible implementations, θ ≦ 60.

In a third aspect, an electronic device is provided, including:

a liquid crystal panel;

the backlight module comprises a backlight lamp bar, the backlight lamp bar comprises a plurality of backlight packaging bodies and at least one light supplementing packaging body, the backlight packaging bodies comprise backlight light sources used for displaying of the liquid crystal panel, and the light supplementing packaging bodies at least comprise light supplementing light sources used for fingerprint detection;

in any one of the first aspect and the first aspect, the fingerprint identification device includes a fingerprint identification module, where the fingerprint identification module is disposed below the backlight module and configured to receive an optical signal emitted by the light supplement light source in the at least one light supplement package, and returned after illuminating the human finger and passing through the backlight module, so as to obtain a fingerprint image of the human finger.

In a fourth aspect, there is provided a display screen comprising:

the backlight module described in any possible implementation manner of the second aspect and the second aspect.

In a fifth aspect, an electronic device is provided, comprising: the display screen of the fourth aspect.

Based on above technical scheme, through setting up at least one light filling packaging body in backlight module's backlight lamp strip, and the light filling light source in the light filling packaging body is used for optical fingerprint identification under the LCD screen. Therefore, in the setting process of the light supplementing light source, the chin width of the whole electronic equipment is not required to be increased, the requirement of high screen occupation ratio of the electronic equipment is met, the requirements of light supplementing and backlight module display of the fingerprint identification module can be met, and the performance of optical fingerprint identification under the LCD screen is improved.

In specific implementation, the light supplement packaging body is formed with a first packaging surface and a second packaging surface, so that the size of the light supplement packaging body is reduced, the light supplement packaging body can be directly welded on a flexible circuit board of a backlight lamp bar, and the structural stacking of the electronic equipment is not affected. Furthermore, the local slope structure that forms for the LCD screen of chase in a poor light, the light filling packaging body is fixed in on the slope structure, makes the certain angle outgoing of light filling light source slope in the light filling packaging body, increases the interval between the polaroid in the LCD screen and the prism film in a poor light in the backlight unit simultaneously, increases emergent light intensity, promotes optical fingerprint identification's under the LCD screen performance.

Drawings

Fig. 1 is a schematic plan view of an electronic device to which the present application may be applied.

Fig. 2 is a schematic view of the light supplement light source disposed on the side wall of the middle frame.

Fig. 3 is a schematic view of a light supplement light source disposed below a backlight bezel.

Fig. 4 is a schematic diagram of an application scenario of a fingerprint identification device according to an embodiment of the present application.

Fig. 5 is a schematic view of a backlight light bar according to an embodiment of the present application.

FIG. 6 is a schematic diagram of a backlight bezel and tilt structure according to an embodiment of the present application.

Fig. 7 is a schematic structural view of a backlight package and a light supplement package according to an embodiment of the present application.

Fig. 8 is a schematic view of a backlight module according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of a display screen according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of an electronic device according to another embodiment of the present application.

Detailed Description

As the smart terminal moves into the full-screen era, the front fingerprint acquisition area of the electronic device is squeezed by the full-screen, so that the Under-screen (or Under-screen) biometric identification technology is more and more concerned, wherein the Under-screen fingerprint identification technology is most favored. Fingerprint identification technology is installed in the display screen below with fingerprint identification device (for example fingerprint identification module) under the screen to realize carrying out the fingerprint identification operation in the display area inside of display screen, need not set up the fingerprint collection region in the positive region except that the display area of electronic equipment.

The underscreen fingerprint identification technology may include underscreen optical fingerprint identification technology, underscreen ultrasonic fingerprint identification technology, or other types of underscreen fingerprint identification technology.

Taking the example of an off-screen optical fingerprinting technique, the off-screen optical fingerprinting technique uses light returning from the top surface of the device display assembly for fingerprint sensing and other sensing operations. The returning light carries information of an object (e.g., a finger) in contact with the top surface, and a specific optical sensor module located below the display screen is implemented by capturing and detecting the returning light. The design of the particular optical sensor module may be such that the desired optical imaging is achieved by appropriately configuring the optical elements used to capture and detect the returned light.

It should be understood that the technical solutions of the embodiments of the present application may be applied to various electronic devices, and more particularly, may be applied to an electronic device having a display screen. For example, other electronic devices such as a portable or mobile computing device such as a smart phone, a notebook computer, a tablet computer, and a game device, but the present application is not limited thereto.

It should also be understood that, the technical solution of the embodiment of the present application may perform other biometric identification besides fingerprint identification, for example, living body identification or palm print identification, and the embodiment of the present application is also not limited thereto.

It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present application, and a detailed description of the like parts is omitted in different embodiments for the sake of brevity.

It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the fingerprint recognition device shown in the drawings are only illustrative and should not be construed as limiting the present application in any way.

Fig. 1 shows a schematic diagram of an electronic device to which embodiments of the present application may be applied.

As shown in fig. 1, the electronic device 10 includes a display screen 120 and an optical fingerprinting device, wherein the optical fingerprinting device is arranged in a partial area below the display screen 120, for example below a middle area of the display screen. The optical fingerprint device comprises an optical fingerprint sensor, wherein the optical fingerprint sensor comprises a sensing array with a plurality of optical sensing units, and the area where the sensing array is located or the sensing area is a fingerprint detection area 103 of the optical fingerprint device. As shown in fig. 1, the fingerprint detection area 103 is located in a display area of the display screen 120.

It should be appreciated that the area of the fingerprint sensing area 103 may be different from the area of the sensing array of the optical fingerprint device, for example, by optical path design such as lens imaging, reflective folded optical path design or other optical path design such as light converging or reflecting, the area of the fingerprint sensing area 103 of the optical fingerprint device may be made larger than the area of the sensing array of the optical fingerprint device. In other alternative implementations, the fingerprint sensing area 103 of the optical fingerprint device may also be designed to substantially coincide with the area of the sensing array of the optical fingerprint device if optical path guidance is performed, for example, by light collimation.

Therefore, when the user needs to unlock or otherwise verify the fingerprint of the terminal device, the user only needs to press the finger on the fingerprint detection area 103 of the display screen 120, so as to input the fingerprint. Since fingerprint detection can be implemented in the screen, the electronic device 10 with the above structure does not need to reserve a space on the front surface thereof to set a fingerprint key (such as a Home key), so that a full-screen scheme can be adopted, that is, the display area of the display screen 120 can be substantially extended to the front surface of the whole electronic device 10.

As an alternative implementation manner, the optical fingerprint device includes a light detection portion and an optical assembly, the light detection portion includes the sensing array and a reading circuit and other auxiliary circuits electrically connected to the sensing array, which can be fabricated on a chip (Die) through a semiconductor process, such as an optical imaging chip or an optical fingerprint sensor, the sensing array is specifically a Photo detector (Photo detector) array, which includes a plurality of Photo detectors distributed in an array, and the Photo detectors can be used as the optical sensing units as described above; the optical assembly can be disposed above the sensing array of the light detection portion, and specifically includes a Filter layer (Filter), a light guide layer or a light path guide structure, and other optical elements, wherein the Filter layer can be used for filtering out ambient light penetrating through the finger, and the light guide layer or the light path guide structure is mainly used for guiding reflected light reflected from the surface of the finger to the sensing array for optical detection.

In a specific implementation, the optical assembly may be packaged with the light detection portion in the same optical fingerprint device. For example, the optical component may be packaged in the same optical fingerprint chip as the optical detection portion, or the optical component may be disposed outside the chip where the optical detection portion 134 is located, such as attaching the optical component above the chip, or integrating some components of the optical component into the chip.

In other embodiments, the optical fingerprint device uses an external light source to provide an optical signal for fingerprint detection, and the optical fingerprint device is suitable for a non-self-luminous display screen, such as a liquid crystal display screen or other passive luminous display screen. Taking an application to a liquid crystal display screen with a backlight module and a liquid crystal panel as an example, to support the underscreen fingerprint detection of the liquid crystal display screen, the optical fingerprint system of the electronic device 10 may further include an excitation light source for optical fingerprint detection, where the excitation light source may specifically be an infrared light source or a light source of non-visible light with a specific wavelength, and may be disposed below the backlight module of the liquid crystal display screen or in an edge area below a protective cover plate of the electronic device 10, and the optical fingerprint device may be disposed below the edge area of the liquid crystal panel or the protective cover plate and guided through a light path so that the fingerprint detection light may reach the optical fingerprint device; or, the optical fingerprint device can also be arranged below the backlight module, and the backlight module is used for perforating film layers such as a diffusion sheet, a brightness enhancement sheet, a reflection sheet and the like or carrying out other optical designs so as to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach the optical fingerprint device.

It should be appreciated that in particular implementations, the electronic device 10 also includes a transparent protective cover positioned over the display screen 120 and covering the front of the electronic device 10. Because, in the present embodiment, the pressing of the finger on the display screen 120 actually means pressing on the cover plate above the display screen 120 or the surface of the protective layer covering the cover plate.

At present, the light supplementing light source adopted by the optical fingerprint identification technology under the screen based on the LCD screen can be set in the following two ways:

firstly, a light supplementing light source 1 is welded on a flexible circuit board 2 to be assembled into a light bar, and then the light bar is bonded on the side wall of a middle frame 4 at the bottom of a liquid crystal panel 3 of an LCD screen, as shown in FIG. 2;

the second method comprises the following steps: the light supplementing light source 1 is welded on the flexible circuit board 2 to be assembled into a light bar, holes are dug in the positions, corresponding to the backlight iron frame 5 of the backlight module, of the light bar, and then the light bar is placed below the backlight iron frame 5 of the backlight module, as shown in fig. 3.

However, in the first method, the width of the light bar needs to be increased to increase the chin width of the electronic device (such as a mobile phone), and the requirement of high screen ratio of the electronic device cannot be met. To above-mentioned mode two, the light that the light source sent passes the backlight unit membrane material earlier, reachs the finger after passing the liquid crystal display panel again, and the light intensity attenuation is great, and partial light easily directly gets into the sensor simultaneously and leads to the light leak, influences fingerprint identification performance.

Based on the technical problems in the first and second modes, the light supplement package body with a special structure is designed in the application and can be arranged in the backlight module. Specifically, a plurality of near-infrared Light Emitting Diode (LED) chips for Light supplement of the fingerprint module are sealed, or at least one near-infrared LED chip and a white LED chip for screen backlight are sealed. The light supplement packaging body is designed into a special-shaped injection molding light supplement packaging body, the size of LED packaging is reduced, the light supplement packaging body can be arranged inside the backlight module, and the structural design of the whole electronic equipment is not influenced. Optimize backlight unit design simultaneously, in being fixed in backlight unit's lamp strip with the slope of light filling packaging body, satisfy fingerprint module light filling and backlight unit simultaneously and show the requirement.

The light filling packaging body is welded on the flexible circuit board of the backlight lamp bar, and the chin width of the electronic equipment does not need to be increased. The backlight iron frame of the backlight module is locally designed to be of an inclined structure, the light supplement packaging body is bonded to the inclined structure of the backlight iron frame, so that a light supplement light source of the fingerprint module can directly penetrate through a liquid crystal panel of the LCD screen to reach the surface of a finger, and the light intensity requirement is met.

The fingerprint identification device, the backlight module, the display screen and the electronic device in the embodiment of the present application will be described clearly with reference to fig. 4 to 11.

Fig. 4 is a schematic diagram of an application scenario of the fingerprint identification device according to the embodiment of the present application.

As shown in fig. 4, the fingerprint recognition device can be applied to an electronic device having an LCD screen including a backlight module 300, wherein the fingerprint recognition device includes:

the fingerprint identification module 210 is configured to be disposed below the backlight module 300, and the fingerprint identification module 210 is configured to receive an optical signal, which is emitted by the light supplement light source 11 in the at least one light supplement package 311, and returns after illuminating a human finger and passes through the backlight module 300, so as to obtain a fingerprint image of the human finger;

the at least one light supplement package 311 is disposed in the backlight bar 310 of the backlight module 300, the backlight bar 310 includes a plurality of backlight packages 312 and the at least one light supplement package 311, and the backlight packages 312 include the backlight light source 12 for the LCD panel display.

In this embodiment, the light supplement package 311 is disposed in the backlight bar 310 of the backlight module 300, that is, the light supplement package 311 is disposed inside the backlight module 300, so that the chin width of the electronic device is not affected, and the requirement of high screen ratio of the electronic device is met.

Optionally, the LCD panel further includes a liquid crystal panel 400, and the liquid crystal panel 400 is located above the backlight module 300, as shown in fig. 4.

It should be understood that, in the embodiment of the present application, the fill light source 11 in the fill light package 311 may be an excitation light source for optical fingerprint detection, and the light signal emitted by the fill light source may be used for fingerprint detection.

Optionally, light emitted by the fill-in light source 11 in the fill-in package 311 is near infrared light, and a wavelength range of the light emitted by the fill-in light source includes, but is not limited to, 850nm to 940 nm. That is, the light signal for fingerprint detection is near infrared light, for example, the fill light source 11 may be a near infrared light LED.

Alternatively, the backlight source 12 in the backlight package 312 may use a visible light source, that is, the light signal for displaying the image on the LCD panel is visible light, for example, the backlight source 12 may be an Electroluminescence (EL) backlight, a compact Cold Cathode Fluorescent Lamp (CCFL), or a white LED backlight.

It should be understood that, in the embodiment of the present application, the optical signal for fingerprint detection is a near infrared light signal emitted by a fill light source, and the optical signal for image display is a visible light signal emitted by a backlight source. Therefore, the fingerprint identification device of the embodiment of the application can avoid the interference of visible light to fingerprint identification, and the infrared light signal is invisible light and cannot influence the display image.

Optionally, the at least one light supplement package 311 is located in the middle of the backlight bar 310, and the plurality of backlight packages 312 are located at two sides of the at least one light supplement package 311.

Optionally, the number of the fill-in light sources 11 in the at least one fill-in package 311 is greater than or equal to 3. Thereby, can satisfy the demand of fingerprint identification module 210 to light filling intensity.

In some embodiments of the present disclosure, the light supplement package 311 is formed by sealing a plurality of light supplement light sources 11, or the light supplement package 311 is formed by sealing at least one light supplement light source 11 and a backlight light source 12.

For example, 1 light supplement light source 11 and 1 backlight light source 12 are sealed together to form a light supplement package 311, 4 light supplement light sources 11 are sealed together to form 4 light supplement packages 311, a front view and a top view of the light supplement package 311 are shown as a (left) in fig. 5, the 4 light supplement packages 311 are located in the middle of the backlight light bar 310, the backlight packages 312 are located at two sides of the 4 light supplement packages 311, and the backlight light bar 310 is shown as a (right) in fig. 5.

For another example, 2 light supplement light sources 11 and 1 backlight light source 12 are sealed together to form one light supplement package 311, 4 light supplement light sources 11 are sealed together to form 2 light supplement packages 311, a front view and a top view of the light supplement package 311 are shown as b (left) in fig. 5, the 2 light supplement packages 311 are located in the middle of the backlight light bar 310, the backlight packages 312 are located at two sides of the 2 light supplement packages 311, and the backlight light bar 310 is shown as b (right) in fig. 5.

For another example, 4 light supplement light sources 11 are sealed to form a light supplement package 311, 4 light supplement light sources 11 are sealed to form 1 light supplement package 311, the front view and the top view of the light supplement package 311 are shown in c (left) in fig. 5, the 1 light supplement package 311 is located in the middle of the backlight light bar 310, the plurality of backlight packages 312 are located at two sides of the 1 light supplement package 311, and the backlight light bar 310 is shown in c (right) in fig. 5.

It should be noted that the backlight light bar 310 shown in fig. 5 is a partial schematic view of the backlight light bar 310, and the number of the backlight packages 312 in the backlight light bar 310 is not limited to that shown in fig. 5.

Optionally, the light sources in one light supplement package 311 may be connected in parallel, so as to independently control each light source in the light supplement package 311.

Optionally, in some embodiments of the present disclosure, the light supplement package 311 is disposed in the backlight bar 310 of the backlight module 300 in an inclined manner relative to the LCD screen, so that the light supplement light source 11 in the light supplement package 311 emits an inclined light to illuminate the fingerprint detection area.

Optionally, the light supplement package 311 has an inclination angle θ with respect to the LCD screen, where θ is greater than or equal to 30 °.

In some embodiments, 30 ≦ θ ≦ 60 ° to ensure that the intensity of the oblique light illuminating the fingerprint detection area satisfies the fingerprint detection requirements.

It should be noted that, in the embodiment of the present application, the backlight light bar 310 is disposed at one side of the backlight module 300, and the fingerprint detection area is located in the display area of the LCD screen. That is, the backlight light bar 310 is located at one side of the lower side of the fingerprint detection area, and therefore, under the condition that the light supplement package body 311 is obliquely arranged in the backlight light bar 310 relative to the LCD screen, the oblique light for illuminating the fingerprint detection area can be emitted by the light supplement light source 11 in the light supplement package body 311, so that the human finger located in the fingerprint detection area can be illuminated by the oblique light emitted by the light supplement light source 11.

Optionally, in a specific implementation, the backlight module 300 further includes a backlight bezel 320, wherein a portion of the backlight bezel 320 forms an inclined structure 321 opposite to the LCD panel, and the light supplement package 311 is fixed on the inclined structure 321 formed by the backlight bezel 320, as shown in fig. 4.

Optionally, the backlight bezel 320 partially forms an inclined structure 321 having an inclination angle θ with respect to the LCD panel. Therefore, after the light supplement package 311 is fixed on the inclined structure 321 formed on the backlight bezel 320, the light supplement package 311 can emit inclined light for illuminating the fingerprint detection area.

As shown in fig. 4, the light supplement package 311 is specifically fixed to the inclined structure 321 formed by the backlight bezel 320 as follows:

the back adhesive 360 is attached to the bottom of the flexible circuit board 350 of the backlight light bar 310, the light supplement package body 311 corresponding to the inclined structure 321 is bonded to the inclined structure 321, and then the backlight package bodies 312 on two sides of the light supplement package body 311 are bonded to the backlight iron frame 320, so that the assembly of the backlight light bar 310 is realized.

In the embodiment of the present application, the backlight bezel 320 is partially designed to be the inclined structure 321 inclined with respect to the LCD panel, and the light supplement package body 311 is fixed on the inclined structure 321, so that a gap between the light supplement light source and the liquid crystal panel of the LCD panel is increased, and light intensity of the inclined light irradiating the fingerprint detection area is increased.

In the embodiment of the present application, the backlight bezel 320 partially forms the inclined structure 321 inclined with respect to the LCD panel, as shown in a in fig. 6, and an enlarged view of the inclined structure 321 may be shown in b in fig. 6.

Optionally, in some embodiments of the present application, as shown in fig. 7 b, the light supplement package body 311 includes a first package surface 21 and a second package surface 22, where the first package surface 21 is an upper surface of the light supplement package body 311 after being disposed obliquely, the second package surface 22 is a side surface of the light supplement package body 311 after being disposed obliquely perpendicular to the first package surface 21, an angle between the first package surface 21 and the light exiting direction 30 of the light supplement light source 11 in the light supplement package body 311 is θ, and an angle between the second package surface 22 and the light exiting direction 30 of the light supplement light source 11 in the light supplement package body 311 is 90- θ.

The light emitting direction 30 of the fill-in light source 11 may be a direction of light with the maximum intensity emitted by the fill-in light source 11, or, in the case where the fill-in light source 11 is a near-infrared light LED, the light emitting direction 30 of the fill-in light source 11 may be a direction perpendicular to the near-infrared light LED chip.

Optionally, as shown in b of fig. 7, a minimum distance D between the light supplement light source 11 in the light supplement package 311 and the first package surface 21 in the first direction 40 ranges from 0.05mm to 0.1mm, and the first direction 40 is perpendicular to the first package surface 21. Therefore, the influence of the height and the width of the light supplement package 311 after being obliquely placed on the entire package stack can be reduced.

In the embodiment of the present invention, as shown in a in fig. 7, the height of the backlight package 312 is H2, and the width of the backlight package 312 is W2, in the embodiment of the present invention, as shown in b in fig. 7, the height of the light supplement package 311 after being tilted is H1, and the width of the light supplement package 311 after being tilted is W1.

It should be noted that the light supplement package 311 includes some other package surfaces besides the first package surface 21 and the second package surface 22, which is not limited in this application.

Optionally, the light supplement package body 311 is attached to the light guide plate 330 of the backlight module 300 through the second package surface 22, as shown in fig. 4. Therefore, the influence of the light supplement package 311 on the entire stack after being obliquely placed can be reduced. In the case where the light supplement package 311 includes the backlight source 12, the backlight source 12 in the light supplement package 311 may be incident into the light guide plate 330.

It should be understood that the light emitted from the backlight source enters the light guide plate 330 and is totally reflected within the light guide plate 330, and the light guide plate 330 functions to guide the emitting direction of the light to improve the luminance of the display panel and ensure the uniformity of the luminance of the display panel.

It should be noted that light emitted from the light source in the light supplement package 311 may pass through at least the first package surface 21 and the second package surface 22.

Alternatively, in some embodiments of the present application, as shown in fig. 4, the distance between the backlight prism film 340 in the backlight module 300 and the polarizer 60 in the LCD panel is greater than or equal to 0.2 mm.

It should be noted that, as shown in fig. 4, the backlight prism film 340 in the backlight module 300 and the polarizer 60 in the LCD panel are fixed by the light shielding glue 50, and the distance between the backlight prism film 340 in the backlight module 300 and the polarizer 60 in the LCD panel can be increased by increasing the thickness of the light shielding glue 50.

Optionally, in some embodiments of the present application, as shown in fig. 4, when the light supplement light source 11 in the light supplement package 311 is a near infrared light source, the light shielding glue 50 on a light path through which near infrared light emitted by the near infrared light source in the light supplement package 311 passes is a near infrared light transmissive material.

Optionally, the near-infrared transmittance of the near-infrared light-transmitting material is greater than or equal to 80%.

In the embodiment of the present application, the light shielding glue 50 on the light path through which the near-infrared light emitted from the near-infrared light source in the light compensation package 311 passes is designed to be a near-infrared light transmissive material, so that the light intensity of the oblique light irradiating the fingerprint detection area is increased.

Optionally, in some embodiments of the present application, as shown in fig. 4, the at least one fill light package 311 and the plurality of backlight packages 312 are soldered on a flexible circuit board 350 to form the backlight light bar 310 in an assembled manner, wherein the backlight light bar 310 is interconnected with at least one real circuit of the fingerprint identification module 210, a screen flexible circuit board, and a motherboard of the electronic device through a connector or a golden finger on the flexible circuit board 350.

Alternatively, the at least one light supplement package 311 and the plurality of backlight packages 312 are soldered on the flexible circuit board by Surface Mount Technology (SMT).

As shown in fig. 4, the flexible circuit board 350 is fixed to the backlight bezel 320 by a back adhesive 360.

It should be noted that the light supplement package 311 in the backlight bar 310 may be interconnected with the fingerprint identification module 210 and/or the main board of the electronic device through a connector or a golden finger on the flexible circuit board 350. And the backlight packages 312 in the backlight light bar 310 can be interconnected with the screen flexible circuit board and/or the main board of the electronic device through connectors or gold fingers on the flexible circuit board 350. In other words, the fill-in light source 11 in the backlight bar 310 is interconnected with the fingerprint recognition module 210 and/or the main board of the electronic device via the connector or the golden finger on the flexible circuit board 350. The backlight light sources 12 in the backlight light bar 310 are interconnected with the screen flexible circuit board and/or the main board of the electronic device through connectors or golden fingers on the flexible circuit board 350.

In the embodiment of the present application, the main board of the electronic device may also be referred to as a small board of the electronic device.

It should be understood that, in the embodiment of the present application, the fingerprint identification device 200 may correspond to the optical fingerprint device in fig. 1, and the specific implementation thereof refers to the related description of the optical fingerprint device in fig. 1, and for brevity, the description thereof is omitted here.

Optionally, in some embodiments of the present application, the fingerprint identification module 210 includes:

The fingerprint sensor may correspond to the light detection portion in the embodiment shown in fig. 1, and the optical component may correspond to the optical component in the embodiment shown in fig. 1, and for specific implementation, reference may be made to relevant descriptions in the embodiment shown in fig. 1, and for brevity, details are not described here again.

It should be understood that in the embodiments of the present application, the pixel of the fingerprint sensor may also be referred to as a sensing unit, an optical sensing unit, etc., and information collected by one pixel of the fingerprint sensor may be used to form one pixel in a fingerprint image.

Therefore, in the embodiment of the present application, at least one light supplement package is disposed in the backlight bar of the backlight module, and a light supplement light source in the light supplement package is used for optical fingerprint recognition under the LCD screen. Therefore, in the setting process of the light supplementing light source, the chin width of the whole electronic equipment is not required to be increased, the requirement of high screen occupation ratio of the electronic equipment is met, the requirements of light supplementing and backlight module display of the fingerprint identification module can be met, and the performance of optical fingerprint identification under the LCD screen is improved.

The embodiment of the present application further provides a backlight module 300, as shown in fig. 8, the backlight module 300 includes: the backlight lamp bar 310 comprises a plurality of backlight packaging bodies 312 and at least one light supplementing packaging body 311, wherein the backlight packaging body 312 comprises a backlight light source 12 for LCD screen display, the light supplementing packaging body 311 at least comprises a light supplementing light source 11 for fingerprint detection, and a fingerprint identification module is arranged below the backlight module 300 to realize optical fingerprint detection under a screen;

the light signal emitted by the light supplement light source 11 in the at least one light supplement package 311 and returned after illuminating the human finger is transmitted to the fingerprint identification module through the backlight module 300, and the light signal is used for acquiring a fingerprint image of the human finger.

Optionally, in some embodiments of the present disclosure, the light supplement package 311 is formed by sealing a plurality of light supplement light sources 11, or the light supplement package 311 is formed by sealing at least one light supplement light source 11 and a backlight light source 12.

Optionally, in some embodiments of the present disclosure, the light supplement package 311 is disposed in the backlight bar 310 of the backlight module 300 obliquely with respect to the LCD screen to emit oblique light for illuminating the fingerprint detection area.

Optionally, in some embodiments of the present application, an inclination angle of the light filling package 311 with respect to the LCD screen is θ, and θ ≧ 30 °.

Optionally, in some embodiments of the present application, the backlight module 300 further includes: the backlight bezel 320, wherein the backlight bezel 320 partially forms an inclined structure 321 opposite to the LCD panel, and the light supplement package 311 is fixed on the inclined structure 321 formed by the backlight bezel 320.

Optionally, in some embodiments of the present application, the backlight bezel 320 partially forms the tilting structure 321 with a tilting angle θ with respect to the LCD screen, and θ ≧ 30 °.

Alternatively, in some embodiments of the present application, θ ≦ 60.

Optionally, in some embodiments of the present application, the light supplement package body 311 includes a first package surface 21 and a second package surface 22, where the first package surface 21 is an upper surface of the light supplement package body 311 after being disposed obliquely, the second package surface 22 is a side surface of the light supplement package body 311 after being disposed obliquely perpendicular to the first package surface 21, an angle between the first package surface 21 and the light exiting direction 30 of the light supplement light source 11 in the light supplement package body 311 is θ, and an angle between the second package surface 22 and the light exiting direction 30 of the light supplement light source 11 in the light supplement package body 311 is 90- θ.

Optionally, in some embodiments of the present disclosure, a minimum distance between the fill-in light source 11 in the fill-in package 311 and the first package surface 21 in the first direction 40 ranges from 0.05mm to 0.1mm, and the first direction 40 is perpendicular to the first package surface 21.

In some possible implementations, the light supplement package 311 is attached to the light guide plate 330 of the backlight module 300 through the second package surface 22.

Optionally, in some embodiments of the present application, the at least one light supplement package 311 and the plurality of backlight packages 312 are soldered on a flexible circuit board 350 to form the backlight light bar 310 in an assembled manner, wherein the backlight light bar 310 is interconnected with at least one of the fingerprint identification module, the screen flexible circuit board, and the main board of the electronic device through a connector or a golden finger on the flexible circuit board 350.

Optionally, in some embodiments of the present disclosure, the at least one light supplement package 311 is located in the middle of the backlight light bar 310, and the plurality of backlight packages 312 are located at two sides of the at least one light supplement package 311.

Optionally, in some embodiments of the present application, the number of the light supplement light sources 11 in the at least one light supplement package 311 is greater than or equal to 3.

Optionally, in some embodiments of the present application, the distance between the backlight prism film 340 in the backlight module 300 and the polarizer in the LCD panel is greater than or equal to 0.2 mm.

Optionally, in some embodiments of the present application, the fill-in light source 11 in the fill-in light package 311 is a near-infrared light source.

Optionally, in some embodiments of the present application, the light shielding glue on a light path through which near-infrared light emitted by the near-infrared light source in the light supplement package 311 passes is made of a near-infrared transparent material.

Optionally, in some embodiments of the present application, the near-infrared transmittance of the near-infrared light transmissive material is greater than or equal to 80%.

It should be understood that, in the embodiment of the present application, the backlight module 300 may refer to the corresponding descriptions in fig. 4 to fig. 7, and for brevity, the description is not repeated herein.

An embodiment of the present application further provides an electronic device 500, as shown in fig. 9, where the electronic device 500 includes:

a liquid crystal panel 400;

the backlight module 300 includes a backlight light bar 310, the backlight light bar 310 includes a plurality of backlight packages 312 and at least one light supplement package 311, the backlight packages 312 include backlight light sources 12 for displaying on the liquid crystal panel 400, and the light supplement package 311 includes at least a light supplement light source 11 for fingerprint detection;

as shown in fig. 4 to 7, the fingerprint identification apparatus 200 includes a fingerprint identification module 210, wherein the fingerprint identification module 210 is disposed below the backlight module 300, and is configured to receive an optical signal emitted by the light supplement light source 11 in the at least one light supplement package 311, and returned after illuminating a human finger, and passing through the backlight module 300 to obtain a fingerprint image of the human finger.

The embodiment of the present application further provides a display screen 600, as shown in fig. 10, the display screen 600 includes the backlight module 300 shown in fig. 8.

An embodiment of the present application further provides an electronic device 700, as shown in fig. 11, where the electronic device 700 includes the display screen 600 shown in fig. 10.

It is to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application.

For example, as used in the examples of this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

If implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses, devices and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed electronic device, apparatus and method may be implemented in other ways.

For example, the division of a unit or a module or a component in the above-described device embodiments is only one logical function division, and there may be other divisions in actual implementation, for example, a plurality of units or modules or components may be combined or may be integrated into another system, or some units or modules or components may be omitted, or not executed.

Also for example, the units/modules/components described above as separate/display components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the units/modules/components can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

Finally, it should be noted that the above shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The above description is only a specific implementation of the embodiments of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments of the present application, and all the changes or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a fingerprint identification device which characterized in that is applied to the electronic equipment who has liquid crystal display LCD screen, the LCD screen includes backlight unit, fingerprint identification device includes:

2. The fingerprint identification device according to claim 1, wherein the fill-in package is formed by sealing a plurality of fill-in light sources, or wherein the fill-in package is formed by sealing at least one fill-in light source and a backlight light source.

3. The fingerprint identification device of claim 1, wherein the light supplement package is disposed in a backlight bar of the backlight module in an inclined manner with respect to the LCD screen to emit inclined light for illuminating a fingerprint detection area.

4. The fingerprint identification device according to claim 3, wherein the light supplement package body has an inclination angle θ with respect to the LCD screen, and θ is greater than or equal to 30 °.

5. The fingerprint identification device of claim 3, wherein the backlight module comprises a backlight iron frame, wherein the backlight iron frame partially forms an inclined structure relative to the LCD screen, and the light supplement package is fixed on the inclined structure formed by the backlight iron frame.

6. The fingerprint identification device of claim 5, wherein the backlight iron frame partially forms an inclined structure with an inclination angle θ relative to the LCD screen, and θ is greater than or equal to 30 °.

7. The fingerprint recognition device of claim 4 or 6, wherein θ ≦ 60 °.

8. The fingerprint identification device according to any one of claims 1 to 6, wherein the light supplement package comprises a first package surface and a second package surface, wherein the first package surface is an upper surface of the light supplement package after being disposed obliquely, the second package surface is a side surface of the light supplement package after being disposed obliquely perpendicular to the first package surface, an angle between the first package surface and a light exit direction of the light supplement light source in the light supplement package is θ, and an angle between the second package surface and the light exit direction of the light supplement light source in the light supplement package is 90- θ.

9. The fingerprint recognition device according to claim 8, wherein a minimum distance between the fill-in light source in the fill-in package and the first package surface in a first direction is in a range of 0.05mm to 0.1mm, and the first direction is perpendicular to the first package surface.

10. The fingerprint identification device according to claim 8, wherein the light supplement package is attached to the light guide plate of the backlight module through the second package surface.

11. The fingerprint recognition device according to any one of claims 1 to 6,

the at least one light supplementing packaging body and the plurality of backlight packaging bodies are welded on a flexible circuit board to form the backlight lamp strip in an assembling mode, wherein the backlight lamp strip is connected with at least one of the fingerprint identification module, the screen flexible circuit board and the mainboard of the electronic equipment in an interconnecting mode through a connector or a golden finger on the flexible circuit board.

12. The fingerprint recognition device according to any one of claims 1 to 6,

the at least one light supplement packaging body is located in the middle of the backlight lamp bar, and the plurality of backlight packaging bodies are located on two sides of the at least one light supplement packaging body.

13. The fingerprint recognition device according to any one of claims 1 to 6,

the number of the light supplement light sources in the at least one light supplement package body is greater than or equal to 3.

14. The fingerprint recognition device according to any one of claims 1 to 6,

and the distance between the backlight prism film in the backlight module and the polaroid in the LCD screen is greater than or equal to 0.2 mm.

15. The fingerprint identification device according to any one of claims 1 to 6, wherein the supplementary lighting light source in the supplementary lighting package is a near infrared light source.

16. The fingerprint recognition device of claim 15,

and the shading glue on a light path through which near infrared light emitted by a near infrared light source in the light supplementing packaging body passes is made of a near infrared light-transmitting material.

17. The fingerprint recognition device of claim 16,

the near-infrared transmittance of the near-infrared light-transmitting material is greater than or equal to 80%.

18. The fingerprint recognition device of any one of claims 1-6, wherein the fingerprint recognition module comprises:

19. A backlight module, comprising: the backlight module comprises a backlight lamp bar, a light compensation module and a light source module, wherein the backlight lamp bar comprises a plurality of backlight packaging bodies and at least one light compensation packaging body, the backlight packaging bodies comprise backlight light sources for Liquid Crystal Display (LCD) screen display, the light compensation packaging bodies at least comprise light compensation light sources for fingerprint detection, and a fingerprint identification module is arranged below the backlight module to realize optical fingerprint detection under a screen;

20. The backlight module as claimed in claim 19, wherein the light filling package is formed by sealing a plurality of light filling light sources, or the light filling package is formed by sealing at least one light filling light source and the backlight light source.

21. The backlight module of claim 19, wherein the light supplement package body is disposed in a backlight bar of the backlight module in an inclined manner with respect to the LCD screen to emit inclined light for illuminating a fingerprint detection area.

22. The backlight module as claimed in claim 21, wherein the light filling package body has an inclination angle θ with respect to the LCD panel, and θ is greater than or equal to 30 °.

23. A backlight module according to claim 21, further comprising: the backlight iron frame is locally formed into an inclined structure relative to the LCD screen, and the light supplement packaging body is fixed on the inclined structure formed by the backlight iron frame.

24. The backlight module according to claim 23, wherein the backlight bezel partially forms an inclined structure with an inclination angle θ with respect to the LCD panel, and θ is greater than or equal to 30 °.

25. A backlight module according to claim 22 or 24, wherein θ ≦ 60 °.

26. The backlight module according to any one of claims 19 to 24, wherein the light supplement package comprises a first package surface and a second package surface, the first package surface is an upper surface of the light supplement package after being tilted, the second package surface is a side surface of the light supplement package after being tilted perpendicular to the first package surface, an angle between the first package surface and a light emitting direction of the light supplement light source in the light supplement package is θ, and an angle between the second package surface and the light emitting direction of the light supplement light source in the light supplement package is 90- θ.

27. The backlight module as claimed in claim 26, wherein a minimum distance between the first package surface and a fill-in light source in a first direction perpendicular to the first package surface is in a range of 0.05mm to 0.1 mm.

28. The backlight module according to claim 26, wherein the light supplement package is attached to the light guide plate of the backlight module through the second package surface.

29. A backlight module according to any one of claims 19-24,

the at least one light supplementing packaging body and the plurality of backlight packaging bodies are welded on a flexible circuit board to form the backlight lamp strip in an assembling mode, wherein the backlight lamp strip is connected with at least one of the fingerprint identification module, the screen flexible circuit board and a mainboard of the electronic device through a connector or a golden finger on the flexible circuit board.

30. A backlight module according to any one of claims 19-24,

31. A backlight module according to any one of claims 19-24,

32. A backlight module according to any one of claims 19-24,

33. The backlight module according to any of claims 19-24, wherein the fill-in light source in the fill-in package is a near-infrared light source.

34. A backlight module according to claim 33,

35. A backlight module according to claim 34, wherein the near-infrared transmission of the near-infrared light transmissive material is greater than or equal to 80%.

36. An electronic device, comprising: a liquid crystal panel;

the fingerprint recognition device according to any one of claims 1 to 18, comprising a fingerprint recognition module, wherein the fingerprint recognition module is disposed below the backlight module, and configured to receive an optical signal emitted by the at least one fill-in light source in the fill-in light package, and returned after illuminating a human finger, and passing through the backlight module to obtain a fingerprint image of the human finger.

37. A display screen, comprising:

a backlight module according to any one of claims 19 to 35.

38. An electronic device, comprising: a display screen as defined in claim 37.