CN111095271B - Fingerprint detection device, display screen and electronic equipment - Google Patents
Fingerprint detection device, display screen and electronic equipment Download PDFInfo
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- CN111095271B CN111095271B CN201980003994.3A CN201980003994A CN111095271B CN 111095271 B CN111095271 B CN 111095271B CN 201980003994 A CN201980003994 A CN 201980003994A CN 111095271 B CN111095271 B CN 111095271B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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Abstract
The application provides a fingerprint detection device which can realize under-screen optical fingerprint detection under the condition of not increasing the area of a non-display area of a display screen. The device is applied to electronic equipment with a display screen, the display screen comprises a liquid crystal panel and a backlight module, a circuit board of the liquid crystal panel forms a bending area below a non-display area of the display screen, and an opening is arranged in the bending area of the circuit board, and the device comprises: a light source disposed within the aperture, wherein the aperture forms a light path from the light source to a fingerprint detection area within the display screen; the optical fingerprint module is arranged below the display screen and is used for detecting the optical signals of the light source irradiating the finger above the fingerprint detection area and returning from the finger.
Description
Technical Field
The embodiment of the application relates to the field of biological feature recognition, and more particularly relates to a fingerprint detection device, a display screen and electronic equipment.
Background
The optical fingerprint module collects optical signals returned by reflection and transmission of fingers above the display screen, and realizes the detection of optical fingerprints under the screen according to fingerprint information of the fingers carried in the optical signals. For a Liquid-Crystal Display (LCD), a backlight module is required to provide a uniform backlight. The backlight module has a reflective film and cannot transmit visible light. Therefore, to achieve off-screen optical fingerprint detection, an additional light supplementing light source is required. However, the light supplementing light source occupies a part of the space under the display screen, and increases the width of the non-display area, i.e., the "chin" area of the display screen.
Disclosure of Invention
The embodiment of the application provides a fingerprint detection device, a display screen and electronic equipment, which can realize the under-screen optical fingerprint detection without increasing the area of a non-display area of the display screen.
In a first aspect, a fingerprint detection device is provided, and the fingerprint detection device is applied to an electronic device having a display screen, the display screen includes a liquid crystal panel and a backlight module, a circuit board of the liquid crystal panel forms a bending area below a non-display area of the display screen, and an opening is provided in the bending area of the circuit board, and the fingerprint detection device includes:
a light source disposed within the aperture, wherein the aperture forms a light path from the light source to a fingerprint detection area within the display screen;
the optical fingerprint module is arranged below the display screen and is used for detecting the optical signals of the light source irradiating the finger above the fingerprint detection area and returning from the finger.
In one possible implementation, the openings include a first opening and a second opening, the first opening being located in a portion of the bending region perpendicular to the display screen, and the second opening being located in a portion of the bending region parallel to the display screen on a side of the display screen.
In one possible implementation, the first opening and the second opening communicate at a right angle to a side of the bending region near the display screen.
In one possible implementation, the light source is fixed to a middle frame of a side of the electronic device.
In one possible implementation, the number of the light sources is a plurality, and the plurality of light sources are disposed in the same or different openings.
In one possible implementation, the light source is an infrared light source.
In one possible implementation, the openings occupy routing areas on the circuit board.
In one possible implementation, the circuit board of the light source forms a bending region below the non-display region.
In one possible implementation manner, the chip of the liquid crystal panel adopts a COF or COG packaging manner.
In one possible implementation manner, the optical fingerprint module is disposed below a display area of the display screen.
In one possible implementation manner, the display screen further includes a glass cover plate, the liquid crystal panel and the backlight module are located below the glass cover plate, and the area where the liquid crystal panel and the backlight module are located forms a display area of the display screen.
In one possible implementation, the circuit board of the liquid crystal panel is a flexible circuit board (Flexible Printed Circuit, FPC).
In a second aspect, a display screen is provided, the display screen includes a liquid crystal panel and a backlight module, wherein a circuit board of the liquid crystal panel forms a bending area below a non-display area of the display screen, and an opening is arranged in the bending area of the circuit board to set a light source for fingerprint detection and form a light channel from the light source to a fingerprint detection area in the display screen.
In one possible implementation, the openings include a first opening and a second opening, the first opening being located in a portion of the bending region perpendicular to the display screen, and the second opening being located in a portion of the bending region parallel to the display screen on a side of the display screen.
In one possible implementation, the first opening and the second opening communicate at a right angle to a side of the bending region near the display screen.
In one possible implementation, the light source is fixed to a middle frame of a side of the electronic device.
In one possible implementation, the number of the light sources is a plurality, and the plurality of light sources are disposed in the same or different openings.
In one possible implementation, the openings occupy routing areas on the circuit board.
In one possible implementation manner, the chip of the liquid crystal panel adopts a COF or COG packaging manner.
In one possible implementation manner, the display screen further includes a glass cover plate, the liquid crystal panel and the backlight module are located below the glass cover plate, and the area where the liquid crystal panel and the backlight module are located forms a display area of the display screen.
In a third aspect, an electronic device is provided, comprising:
the display screen comprises a liquid crystal panel and a backlight module, wherein a circuit board of the liquid crystal panel forms a bending area below a non-display area of the display screen, and an opening is arranged in the bending area of the circuit board;
a light source disposed within the aperture, wherein the aperture forms a light path from the light source to a fingerprint detection area within the display screen;
the optical fingerprint module is arranged below the display screen and is used for detecting the optical signals of the light source irradiating the finger above the fingerprint detection area and returning from the finger.
In one possible implementation, the openings include a first opening and a second opening, the first opening being located in a portion of the bending region perpendicular to the display screen, and the second opening being located in a portion of the bending region parallel to the display screen on a side of the display screen.
In one possible implementation, the first opening and the second opening communicate at a right angle to a side of the bending region near the display screen.
In one possible implementation, the light source is fixed to a middle frame of a side of the electronic device.
In one possible implementation, the number of the light sources is a plurality, and the plurality of light sources are disposed in the same or different openings.
In one possible implementation, the light source is an infrared light source.
In one possible implementation, the openings occupy routing areas on the circuit board.
In one possible implementation, the circuit board of the light source forms a bending region below the non-display region.
In one possible implementation manner, the chip of the liquid crystal panel adopts a COF or COG packaging manner.
In one possible implementation manner, the optical fingerprint module is disposed below a display area of the display screen.
In one possible implementation manner, the display screen further includes a glass cover plate, the liquid crystal panel and the backlight module are located below the glass cover plate, and the area where the liquid crystal panel and the backlight module are located forms a display area of the display screen.
In one possible implementation, the circuit board of the liquid crystal panel is an FPC.
In a fourth aspect, there is provided an electronic device comprising:
the apparatus of the first aspect or fingerprint detection in any possible implementation of the first aspect; the method comprises the steps of,
the display of the second aspect or any possible implementation of the second aspect.
Based on the technical scheme, the circuit board of the liquid crystal panel is provided with the holes for arranging the light source, so that fingerprint detection can be performed by using the light source under the condition of not increasing the area of a non-display area of the display screen.
Drawings
Fig. 1A and fig. are schematic views of an electronic device to which the present application can be applied.
Fig. 1B and 2B are schematic cross-sectional views of the electronic device shown in fig. 1A and 2A, respectively, along A-A'.
Fig. 3 is a schematic view of a display screen.
Fig. 4 is a schematic diagram of a backlight module.
Fig. 5 is a schematic block diagram of a display screen of an embodiment of the present application.
Fig. 6 is a schematic block diagram of an apparatus for fingerprint detection according to an embodiment of the present application.
Fig. 7 is a schematic diagram of a light supplementing light source.
Fig. 8 is a schematic diagram of fingerprint detection.
Fig. 9 is a schematic diagram of the supplemental light source causing widening of the "chin" area.
Fig. 10 is a schematic diagram of bending the circuit board of the liquid crystal panel under the non-display area.
Fig. 11 is a schematic view of an opening on a circuit board of a liquid crystal panel according to an embodiment of the present application.
Fig. 12 and 13 are schematic views of a first opening and a second opening on a circuit board of a liquid crystal panel according to an embodiment of the present application.
Fig. 14 to 16 are schematic views showing that the first opening and the second opening on the circuit board of the liquid crystal panel of the embodiment of the present application communicate at right angles.
Fig. 17 is a schematic block diagram of an electronic device of an embodiment of the application.
Detailed Description
The technical scheme of the application will be described below with reference to the accompanying drawings.
It should be understood that embodiments of the present application may be applied to fingerprint systems, including but not limited to optical, ultrasound or other fingerprint detection systems and medical diagnostic products based on optical, ultrasound or other fingerprint imaging, and are described by way of example only with respect to optical fingerprint systems, but should not be construed as limiting the embodiments of the present application in any way, as well as other systems employing optical, ultrasound or other imaging techniques, etc.
As a common application scenario, the optical fingerprint system provided by the embodiment of the application can be applied to smart phones, tablet computers and other mobile terminals or other electronic devices with display screens; more specifically, in the above electronic device, the optical fingerprint module may be disposed in a partial area or a whole area Under the display screen, thereby forming an Under-screen (or Under-screen) optical fingerprint system. Alternatively, the optical fingerprint module may be partially or fully integrated into the display screen of the electronic device, so as to form an In-screen (In-display or In-screen) optical fingerprint system.
The off-screen optical fingerprint detection technology uses light returning from the top surface of the device display assembly for fingerprint sensing and other sensing operations. The returned light carries information about an object, such as a finger, in contact with the top surface, and by collecting and detecting the returned light from the finger, optical fingerprint detection of a particular optical sensor module located below the display screen is achieved. The design of the optical sensor module may be such that the desired optical imaging is achieved by properly configuring the optical elements for collecting and detecting the returning light.
Fig. 1A and 2A show schematic diagrams of electronic devices to which embodiments of the present application may be applied. Fig. 1A and 2A are schematic directional diagrams of the electronic device 10, and fig. 1B and 2B are schematic partial cross-sectional diagrams of the electronic device 10 shown in fig. 1A and 2A along A-A', respectively.
The electronic device 10 includes a display 120 and an optical fingerprint module 130. The optical fingerprint module 130 is disposed in a local area below the display screen 120. The optical fingerprint module 130 includes an optical fingerprint sensor including a sensing array 133 having a plurality of optical sensing units 131 (also referred to as pixels, photosensitive pixels, pixel units, etc.). The area where the sensing array 133 is located or the sensing area thereof is the fingerprint detection area 103 of the optical fingerprint module 130. As shown in fig. 1A, the fingerprint detection area 103 is located in the display area of the display screen 120. In an alternative implementation, the optical fingerprint module 130 is disposed at another location, such as at a side of the display screen 120 or at an edge non-transparent area of the electronic device 10, and the optical signal from at least a portion of the display area of the display screen 120 is guided to the optical fingerprint module 130 by an optical path design, so that the fingerprint detection area 103 is actually located in the display area of the display screen 120.
It should be appreciated that the area of the fingerprint detection area 103 may be different from the area of the sensing array 133 of the optical fingerprint module 130, such as by a lens imaging optical path design, a reflective folded optical path design, or other optical path designs such as light converging or reflecting, so that the area of the fingerprint detection area 103 of the optical fingerprint module 130 is larger than the area of the sensing array 133 of the optical fingerprint module 130. In other alternative implementations, if the light path is guided, for example, by light collimation, the fingerprint detection area 103 of the optical fingerprint module 130 may be designed to substantially coincide with the area of the sensing array 133 of the optical fingerprint module 130.
Thus, when a user needs to unlock the electronic device 10 or otherwise verify a fingerprint, the user may simply press a finger against the fingerprint detection area 103 on the display 120 to effect fingerprint input. Since fingerprint detection can be implemented in the screen, the electronic device 10 adopting the above structure does not need to have a special reserved space on the front surface to set fingerprint keys (such as Home keys), so that a comprehensive screen scheme can be adopted, that is, the display area of the display screen 120 can be basically expanded to the front surface of the whole electronic device 10.
As an implementation, as shown in fig. 1B, the optical fingerprint module 130 includes a light detecting portion 134 and an optical component 132. The light detecting part 134 includes the sensing array 133, and a reading circuit and other auxiliary circuits electrically connected to the sensing array 133, which may be fabricated on one chip (Die) by a semiconductor process to form an optical fingerprint sensor (also referred to as an optical fingerprint chip, a sensor chip, a chip, etc.). The sensing array 133 is specifically a photo detector (photo detector) array, which includes a plurality of photo detectors distributed in an array, and the photo detectors may be used as the optical sensing units as described above. The optical component 132 may be disposed above the sensing array 133 of the light detecting portion 134, and may specifically include a Filter layer (Filter), a light guiding layer or a light path guiding structure, and other optical elements, where the Filter layer may be used to Filter out ambient light penetrating the finger, and the light guiding layer is mainly used to guide reflected light reflected from the finger surface to the sensing array 133 for fingerprint detection.
In particular implementations, the optical assembly 132 may be packaged in the same optical fingerprint component as the light detection section 134. For example, the optical component 132 may be packaged in the same optical fingerprint chip as the light detecting portion 134, or the optical component 132 may be disposed outside the chip in which the light detecting portion 134 is located, for example, the optical component 132 is attached above the chip, or part of the components of the optical component 132 are integrated in the chip.
There are various implementations of the light guiding layer of the optical component 132. For example, the light guiding layer may be a Collimator (Collimator) layer fabricated on a semiconductor silicon wafer, which has a plurality of collimating units or a micropore array, where the collimating units may be small holes, the light vertically incident to the collimating units may pass through and be received by the optical sensing units below the collimating units, and the light with an excessive incident angle is attenuated by multiple reflections inside the collimating units, so each optical sensing unit basically only receives the reflected light reflected by the fingerprint pattern directly above the optical sensing units, and the sensing array 133 may detect the fingerprint image of the finger.
In another implementation, the light guiding layer may also be an optical Lens (Lens) layer having one or more Lens units, for example a Lens group consisting of one or more aspheric lenses, for converging the reflected light reflected from the finger to the sensing array 133 of the light detecting part 134 thereunder, so that the sensing array 133 may image based on the reflected light, thereby obtaining a fingerprint image of the finger. Optionally, the optical lens layer may further form a pinhole in the optical path of the lens unit, and the pinhole may cooperate with the optical lens layer to expand the field of view of the optical fingerprint module 130, so as to improve the fingerprint imaging effect of the optical fingerprint module 130.
In other implementations, the light guiding layer may also specifically employ a Micro-Lens layer having a Micro Lens array formed of a plurality of Micro lenses, which may be formed over the sensing array 133 of the light sensing portion 134 by a semiconductor growth process or other processes, and each Micro Lens may correspond to one of sensing cells of the sensing array 133, respectively. Other optical film layers, such as dielectric layers or passivation layers, may also be formed between the microlens layer and the sensing unit. Further, a light blocking layer (also referred to as a light blocking layer, etc.) having micro holes formed between its corresponding micro lens and sensing unit may be further included between the micro lens layer and the sensing unit, the light blocking layer may block optical interference between adjacent micro lenses and sensing unit, and cause light corresponding to the sensing unit to be converged into the inside of the micro holes through the micro lenses and transmitted to the sensing unit through the micro holes for optical fingerprint imaging.
It should be appreciated that several implementations of the light guiding layer described above may be used alone or in combination. For example, a microlens layer may be further provided above or below the collimator layer or the optical lens layer. Of course, when the collimator layer or the optical lens layer is used in combination with the microlens layer, the specific laminated structure or the optical path thereof may need to be adjusted according to actual needs.
As an implementation manner, the display screen 120 may be a display screen having a self-luminous display unit, such as an Organic Light-Emitting Diode (OLED) display screen or a Micro-LED (Micro-LED) display screen. Taking an OLED display as an example, the optical fingerprint module 130 may use a display unit (i.e., an OLED light source) of the OLED display 120 located in the fingerprint detection area 103 as an excitation light source for optical fingerprint detection. When the finger 140 is pressed against the fingerprint detection area 103, the display 120 emits a beam of light 111 to the finger 140 above the fingerprint detection area 103, and the light 111 is reflected on the surface of the finger 140 to form reflected light or scattered light is scattered inside the finger 140 to form scattered light. In the related patent application, the above-described reflected light and scattered light are also collectively referred to as reflected light for convenience of description. Since the ridge (ridge) 141 and the valley (valley) 142 of the fingerprint have different light reflection capacities, the reflected light 151 from the ridge of the fingerprint and the reflected light 152 from the valley of the fingerprint have different light intensities, and after passing through the optical component 132, the reflected light is received by the sensing array 133 in the optical fingerprint module 130 and converted into a corresponding electrical signal, i.e. a fingerprint detection signal. Fingerprint image data may be obtained based on the fingerprint detection signal and further fingerprint matching verification may be performed, thereby implementing an optical fingerprint detection function in the electronic device 10.
In other implementations, the optical fingerprint module 130 may also use an internal light source or an external light source to provide an optical signal for fingerprint detection. In this case, the optical fingerprint module 130 may be adapted to a non-self-luminous display screen, such as a liquid crystal display screen or other passive light emitting display screen. Taking the application to a liquid crystal display having a backlight module and a liquid crystal panel as an example, to support the under-screen fingerprint detection of the liquid crystal display, 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 be specifically 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 or disposed in an edge area below a protective cover plate of the electronic device 10, and the optical fingerprint module 130 may be disposed below the edge area of the liquid crystal panel or the protective cover plate and guided by an optical path so that fingerprint detection light may reach the optical fingerprint module 130; alternatively, the optical fingerprint module 130 may be disposed below the backlight module, and the backlight module may be configured to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach the optical fingerprint module 130 by making holes or other optical designs on the film layers such as the diffusion sheet, the brightness enhancement sheet, and the reflection sheet. When the optical fingerprint module 130 is used to provide an optical signal for fingerprint detection using an internal light source or an external light source, the detection principle is consistent with the above description.
It should be appreciated that in a specific implementation, the electronic device 10 may further include a transparent protective cover plate, which may be a glass cover plate or a sapphire cover plate, that is positioned over the display screen 120 and covers the front side of the electronic device 10. Thus, in the embodiment of the present application, the pressing of the finger against the display screen 120 actually means pressing the cover plate above the display screen 120 or the surface of the protective layer covering the cover plate.
The electronic device 10 may further include a circuit board disposed below the optical fingerprint module 130. The optical fingerprint module 130 may be adhered to the circuit board by a back adhesive, and electrically connected to the circuit board by soldering with a pad and a metal wire. The optical fingerprint module 130 may be electrically interconnected and signal-transmitting with other peripheral circuits or other elements of the electronic device 10 through a circuit board. For example, the optical fingerprint module 130 may receive a control signal of the processing unit of the electronic device 10 through the circuit board, and may also output a fingerprint detection signal from the optical fingerprint module 130 to the processing unit or the control unit of the terminal device 10 through the circuit board, or the like.
In some implementations, the optical fingerprint module 130 may include only one optical fingerprint sensor, where the area of the fingerprint detection area 103 of the optical fingerprint module 130 is smaller and the position is fixed, so that the user needs to press the finger to a specific position of the fingerprint detection area 103 when inputting the fingerprint, otherwise, the optical fingerprint module 130 may not be able to collect the fingerprint image, resulting in poor user experience. In other alternative embodiments, the optical fingerprint module 130 may include a plurality of optical fingerprint sensors. The plurality of optical fingerprint sensors may be disposed side by side below the display screen 120 in a spliced manner, and the sensing areas of the plurality of optical fingerprint sensors together form the fingerprint detection area 103 of the optical fingerprint module 130. Thus, the fingerprint detection area 103 of the optical fingerprint module 130 can be extended to the main area of the lower half of the display screen, that is, to the finger usual pressing area, thereby realizing the blind press type fingerprint input operation. Further, when the number of the optical fingerprint sensors is sufficient, the fingerprint detection area 103 may be further extended to a half display area or even the whole display area, so as to implement half-screen or full-screen fingerprint detection.
For example, as shown in fig. 2A and 2B, the optical fingerprint module 130 in the electronic device 10 includes a plurality of optical fingerprint sensors, where the plurality of optical fingerprint sensors may be disposed side by side under the display screen 120 by, for example, splicing, and sensing areas of the plurality of optical fingerprint sensors together form the fingerprint detection area 103 of the optical fingerprint module 130.
In one implementation, the optical component 132 may include a plurality of light guiding layers corresponding to the plurality of optical fingerprint sensors of the optical fingerprint module 130, where each light guiding layer corresponds to one optical fingerprint sensor and is respectively attached to and disposed above the corresponding optical fingerprint sensor. Alternatively, the plurality of optical fingerprint sensors may share a unitary light guiding layer, i.e. the light guiding layer has an area large enough to cover the sensing array of the plurality of optical fingerprint sensors.
In addition, the optical component 132 may further include other optical elements, such as a Filter (Filter) or other optical film, which may be disposed between the light guide layer and the optical fingerprint sensor or between the display 120 and the light guide layer, and is mainly used to isolate the influence of the external interference light on the optical fingerprint detection. Wherein the filter layer may be used to filter out ambient light that penetrates the finger and enters the optical fingerprint sensor through the display screen 120. Similar to the light guide layer, the filter layer may be separately provided for each optical fingerprint sensor to filter out interference light, or may also use a large-area filter to cover the plurality of optical fingerprint sensors at the same time.
The light guide layer can also be replaced by an optical Lens (Lens), and a small hole can be formed above the optical Lens through a shading material and matched with the optical Lens to converge fingerprint detection light to an optical fingerprint sensor below so as to realize fingerprint imaging. Similarly, each optical fingerprint sensor may be configured with one optical lens for fingerprint imaging, or the plurality of optical fingerprint sensors may use the same optical lens for light convergence and fingerprint imaging. In other alternative embodiments, each optical fingerprint sensor may even have two sensing arrays (Dual Array) or multiple sensing arrays (Multi-Array), and two or more optical lenses are simultaneously configured to optically image the two or more sensing arrays, thereby reducing imaging distance and enhancing imaging effect.
The fingerprint detection scheme in the embodiment of the application can be applied to a non-self-luminous display screen, such as a liquid crystal display screen. As shown in fig. 3, the display screen 500 includes a liquid crystal layer 510 and a backlight module 520 disposed below the liquid crystal layer 510. As shown in fig. 4, the liquid crystal layer 510 includes a cover glass 511 and a liquid crystal panel 512. The backlight module 520 includes a brightness enhancement film 521, a light homogenizing film 522, a light guide plate 523, a reflective film 524, and a reinforcing steel plate 525 in this order. In this case, the reflective film 524 cannot transmit visible light, so an additional light-compensating light source is required for fingerprint detection. However, the light supplementing light source occupies a part of the space below the display screen, and increases the width of the non-display area of the display screen. Therefore, the area of the display area within the display screen is reduced, reducing the screen duty cycle of the electronic device. Hereinafter, the light sources are all referred to as the light-compensating light sources.
In the embodiment of the application, the holes are formed in the circuit board of the liquid crystal panel below the non-display area for arranging the light source, so that the fingerprint detection can be performed by using the light source under the condition of not increasing the area of the non-display area of the display screen.
Fig. 5 is a schematic block diagram of a display screen 500 of an embodiment of the present application. As shown in fig. 5, the display 500 includes a liquid crystal panel 512 and a backlight module 520. The circuit board 513 of the liquid crystal panel 512 forms a bending area below the non-display area of the display screen 500, and an opening is provided in the bending area of the circuit board 513 to provide a light source 610 for fingerprint detection, and form a light channel from the light source 610 to a fingerprint detection area in the display screen 500.
Fig. 6 is a schematic block diagram of an apparatus 600 for fingerprint detection according to an embodiment of the present application. The apparatus 600 is applied to an electronic device having a display screen 500. As shown in fig. 6, the apparatus 600 includes:
a light source 610 disposed within the aperture;
the optical fingerprint module 620 is disposed below the display screen 500, and is configured to detect an optical signal that the light source 610 irradiates a finger above the fingerprint detection area and returns from the finger.
In the embodiment of the application, the holes are formed in the circuit board of the liquid crystal panel below the non-display area for arranging the light source, so that the fingerprint detection can be performed by using the light source under the condition of not increasing the area of the non-display area of the display screen.
The display screen 500 may further include a glass cover plate 511, and the liquid crystal panel 512 and the backlight module 520 are located below the glass cover plate 511. The liquid crystal panel 512 and the backlight module 520 form a display area of the display screen 500.
Fig. 7 and 8 are top and side views, respectively, of an electronic device. Wherein the fingerprint detection area 5011 is located within the display area 501 of the display screen 500 shown in fig. 7, the non-display area 502 of the display screen 500 is also referred to as the "chin" area of the electronic device, and the light source 610 for fingerprint detection is located below the non-display area 502.
As shown in fig. 8, a liquid crystal panel 512 and a backlight module 520 are sequentially arranged below the glass cover 511. The area where the liquid crystal panel 512 and the backlight module 520 are located forms the display area 501 of the display screen 500. The space under the non-display area 502 of the display screen 500 may be used to accommodate the circuit board 513 of the liquid crystal panel 512 and the light source 610. The light signal emitted by the light source 610 irradiates the finger above the fingerprint detection area 5011, and returns to the optical fingerprint module 620 below the backlight module 520 by reflection and scattering of the finger. The optical signal carries fingerprint information of the finger. The optical fingerprint module 620 receives the optical signal for fingerprint detection.
The optical fingerprint module 620 may be disposed under the display area 501 of the display screen 500 or under the non-display area 502 thereof. In fig. 8, only the optical fingerprint module 620 is illustrated as being disposed below the backlight module 520.
The light source 610 may be, for example, an infrared light source. Thus, the optical signal returned by the finger can pass through the backlight module 520 to reach the optical fingerprint module 620.
It should be understood that the optical fingerprint module 620 may be, for example, the optical fingerprint module 130 shown in fig. 1B and 2B, and the related features may refer to the description of the optical fingerprint module 130, which is not repeated herein for brevity.
The circuit board 513 of the liquid crystal panel 512 may be, for example, an FPC. The Chip of the liquid crystal panel 512 may be, for example, a Chip On FPC (COF) package; or a packaging mode of a Glass bearing Chip (Chip On Glass, COG) is adopted. When the COF package method is adopted, the chip of the liquid crystal panel 512 may be fixed to the FPC of the liquid crystal panel 512. When the COG packaging method is adopted, the chip of the liquid crystal panel 512 may be fixed on the glass cover plate 511 and then led out to the FPC. In either of the above-described packaging methods, the circuit board 513 of the liquid crystal panel 512 forms a bending region under the non-display region 502 of the display 500.
As shown in fig. 9, the light source 610 and the circuit board 611 thereof are disposed below the non-display area 502, and are adhered to the middle frame 710 of the side of the electronic device by a double sided tape 612. It can be seen that to set the light source 610, the width of the non-display area 502 needs to be increased by W, which is typically greater than 0.7mm. Accordingly, this reduces the width of the display area 501, affecting the user experience.
Fig. 10 shows a bending region 5131 of the circuit board 513 of the liquid crystal panel 512. As shown in fig. 10, the circuit board 513 is bent under the non-display region 502 of the display 500 to form a bent region 5131. The bent circuit board 513 is connected to the motherboard 720 of the electronic device through its interface 5133. Typically, the bending of the circuit board 513 requires reserving a sufficient space area, e.g., 0.7mm to 0.8mm. A certain safety distance, for example, about 0.3mm, is reserved between the circuit board 513 and the side middle frame 710.
For fingerprint detection, a light source 610 is added below the non-display area 502. In the embodiment of the present application, an opening is provided in the bending area 5131 of the circuit board 513 below the non-display region 502 for accommodating the light source 610. And, the aperture can form a light path from the light source 610 to the fingerprint detection area 5011 within the display screen 500.
The position of the opening is not limited in the embodiment of the present application, and the opening can be used to set the light source 610 and form a light channel from the light source 610 to the fingerprint detection area 5011.
Fig. 11 is a top view of an electronic device. The circuit board 513 of the liquid crystal panel 512 is bent under the chin area of the display screen to form a bending area 5131. An opening 5132 is disposed in the bending region 5131 of the circuit board 513, and the opening 5132 is used for disposing the light source 610. The light emitted from the light source 610 should be transmitted to the fingerprint detection area 5011 through the opening 5132 for fingerprint detection.
In one implementation, the apertures 5132 can include a first aperture 5132A and a second aperture 5132B. Wherein, the first opening 5132A is located in a portion of the bending region 5131 perpendicular to the display screen, and the second opening 5132B is located in a portion of the bending region 5131 close to and parallel to the display screen.
As shown in fig. 12 and 13, the bending region 5131 of the circuit board 513 of the liquid crystal panel 512 includes a portion perpendicular to the display screen and a portion parallel to the display screen. The openings 5132 provided on the bending region 5131 include a first opening 5132A and a second opening 5132B. The first opening 5132A is located in a region perpendicular to the display screen in the bending region 5131, and the second opening 5132B is located in a region parallel to and close to the display screen in the bending region 5131. The light source 610 is disposed in the first opening 5132A. Also, as shown in fig. 13, since the second opening 5132B can form a light path from the light source 610 to the fingerprint detection region 5011 with the first opening 5132A, light emitted from the light source 610 can be transmitted to the finger above the fingerprint detection region 5011 through the light path. The light returned by the finger is collected by the optical fingerprint module 620 for fingerprint detection.
Fig. 12 and 13 show 4 first openings 5132A for disposing 4 light sources 610, respectively, and show corresponding 4 second openings 5132B, but the present application is not limited thereto. The number of the first openings 5132A may be plural, and each of the first openings is used for disposing a plurality of light sources 610; the number of the first openings 5132A may be one, so that a plurality of light sources 610 are disposed in the same opening. The number of the second openings 5132B may be one or more as long as a light path from the light source 610 to the fingerprint detection area can be formed between the first openings 5132A. Also, the number of the first openings 5132A and the second openings 5132B may be equal or unequal.
Further, in another implementation, the first opening 5132A and the second opening 5132B communicate at a right angle to a side of the bending region 5131 that is closer to the display.
For example, as shown in fig. 14 to 16, wherein fig. 16 is a top view. In the bending region 5131 of the circuit board 513 of the liquid crystal panel 512, a right angle is formed between two faces perpendicular and parallel to the display screen. The opening 5132 is located at the right angle near the display screen side, that is, the first opening 5132A and the second opening 5132B in fig. 12 and 13 communicate at the right angle. Alternatively, the hole 5132 is bored at the right angle of the bending region 5131 to form the opening 5132. In this way, the light source 610 is disposed in the opening 5132 at the right angle, and the light emitted therefrom can be directly irradiated to the finger above the fingerprint detection area 5011. In fig. 14 to 16, for example, 4 light sources 610 are disposed in the 4 openings 5132, respectively.
The light sources shown in fig. 12-16 are side light sources that may be disposed, for example, on a side center 710 of the electronic device.
The number of light sources 610 is not limited by embodiments of the present application. The number of the light sources 610 may be one or a plurality. When the number of the light sources 610 is plural, the plural light sources 610 may be disposed in the same or different openings. Fig. 11 to 16 illustrate an example in which 4 light sources are respectively disposed in different openings. It should be appreciated that when the number of light sources 610 is one, the light sources 610 may be a strip of light disposed within an aperture having a length that matches the length of the strip of light.
In order not to affect the functions of other devices on the circuit board, the openings in the embodiment of the application occupy the routing area on the circuit board. Typically, the portion of the circuit board located below the non-display area of the display screen is provided as a trace, and no other devices are provided. In the circuit board of the embodiment of the application, the wiring area is provided with an opening. When the circuit board is manufactured, the wiring is wound around the opening, and the function of the circuit board is not affected.
In addition, the circuit board 611 of the light source 610 may also form a bent region under the non-display region 502. The interface 612 on the circuit board 611 of the light source 610, the interface 5133 on the circuit board 513 of the liquid crystal panel 512, and the interface on the circuit board of the optical fingerprint module 620 may all be connected to the motherboard of the electronic device.
The embodiment of the application also provides an electronic device 700, as shown in fig. 17, where the electronic device 700 includes:
the display screen 500 comprises a liquid crystal panel and a backlight module, wherein a circuit board of the liquid crystal panel forms a bending area below a non-display area of the display screen, and an opening is arranged in the bending area of the circuit board;
a light source 610 disposed within the aperture, wherein the aperture forms a light path from the light source to a fingerprint detection area within the display screen; the method comprises the steps of,
the optical fingerprint module 620 is disposed below the display screen 500, and is configured to detect an optical signal that the light source irradiates a finger above the fingerprint detection area and returns from the finger.
It should be appreciated that the electronic device 700 includes the display screen 500 and the apparatus 600 for fingerprint detection in the various embodiments of the application described above. Accordingly, the descriptions of the display 500, the light source 610, and the optical fingerprint module 620 may refer to the descriptions related to fig. 3 to 16. For brevity, no further description is provided herein.
The display 500 may be a conventional non-folding display, or may be a foldable display, or may be referred to as a flexible display.
As an example and not by way of limitation, the electronic device in the embodiments of the present application may be a portable or mobile computing device such as a terminal device, a mobile phone, a tablet computer, a notebook computer, a desktop computer, a game device, an in-vehicle electronic device, or a wearable intelligent device, and other electronic devices such as an electronic database, an automobile, and a bank automated teller machine (Automated Teller Machine, ATM). The wearable intelligent device comprises full functions, large size and complete or partial functions which can be realized independent of the intelligent mobile phone, for example: smart watches or smart glasses, etc., and are only focused on certain application functions, and need to be used in combination with other devices, such as smart phones, as well as devices for monitoring physical signs, such as smart bracelets, smart jewelry, etc.
It should be noted that, on the premise of no conflict, the embodiments and/or technical features in the embodiments described in the present application may be combined with each other arbitrarily, and the technical solutions obtained after combination should also fall into the protection scope of the present application.
It should be understood that the specific examples in the embodiments of the present application are intended to help those skilled in the art to better understand the embodiments of the present application, and not to limit the scope of the embodiments of the present application, and that those skilled in the art may make various modifications and variations on the basis of the above embodiments, and that these modifications or variations fall within the scope of the present application.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (33)
1. The utility model provides a fingerprint detection's device, its characterized in that is applied to the electronic equipment that has the display screen, the display screen includes liquid crystal display panel and backlight unit, liquid crystal display panel's circuit board forms the region of buckling in the non-display area below of display screen, be provided with the trompil in the region of buckling of circuit board, the device includes:
The light source is arranged in the opening, wherein the opening forms a light channel from the light source to a fingerprint detection area in the display screen, and the fingerprint detection area is positioned in a display area of the display screen;
the optical fingerprint module is arranged below the display screen and is used for detecting the optical signals of the light source irradiating the finger above the fingerprint detection area and returning from the finger.
2. The device of claim 1, wherein the openings comprise a first opening and a second opening, the first opening being located in a portion of the bending region perpendicular to the display screen, the second opening being located in a portion of the bending region parallel to the display screen on a side of the display screen.
3. The device of claim 2, wherein the first aperture and the second aperture communicate at a right angle to a side of the bend region proximate the display screen.
4. A device according to any one of claims 1 to 3, wherein the light source is fixed to a central frame of a side of the electronic apparatus.
5. A device according to any one of claims 1 to 3, wherein the number of light sources is a plurality, a plurality of the light sources being disposed within the same or different apertures.
6. A device according to any one of claims 1 to 3, wherein the light source is an infrared light source.
7. A device according to any one of claims 1 to 3, wherein the aperture occupies a trace area on the circuit board.
8. A device according to any one of claims 1 to 3, wherein the circuit board of the light source forms a bending region below the non-display region.
9. A device according to any one of claims 1 to 3, wherein the chip of the liquid crystal panel is packaged by a chip on chip COF or a chip on glass COG.
10. A device according to any one of claims 1 to 3, wherein the optical fingerprint module is disposed below a display area of the display screen.
11. A device according to any one of claims 1 to 3, wherein the display screen further comprises a glass cover plate, the liquid crystal panel and the backlight module being located below the glass cover plate, the area where the liquid crystal panel and the backlight module are located forming a display area of the display screen.
12. A device according to any one of claims 1 to 3, wherein the circuit board of the liquid crystal panel is a flexible circuit board FPC.
13. The display screen is characterized by comprising a liquid crystal panel and a backlight module, wherein a circuit board of the liquid crystal panel forms a bending area below a non-display area of the display screen, an opening is arranged in the bending area of the circuit board so as to set a light source for fingerprint detection, a light channel from the light source to a fingerprint detection area in the display screen is formed, and the fingerprint detection area is located in the display area of the display screen.
14. The display of claim 13, wherein the openings comprise a first opening and a second opening, the first opening being located in a portion of the bend region perpendicular to the display, the second opening being located in a portion of the bend region parallel to the display on a side of the display.
15. The display of claim 14, wherein the first aperture and the second aperture communicate at a right angle to a side of the bend region proximate the display.
16. A display screen according to any one of claims 13 to 15, wherein the light source is fixed to a central frame of a side of the electronic device.
17. A display screen as claimed in any one of claims 13 to 15, wherein the number of light sources is plural, a plurality of the light sources being disposed within the same or different apertures.
18. A display screen according to any one of claims 13 to 15, wherein the apertures occupy routing areas on the circuit board.
19. A display screen according to any one of claims 13 to 15, wherein the chip of the liquid crystal panel is packaged by a chip on chip COF or a chip on glass COG.
20. The display screen of any one of claims 13 to 15, further comprising a glass cover plate, wherein the liquid crystal panel and the backlight module are positioned below the glass cover plate, and wherein the area where the liquid crystal panel and the backlight module are positioned forms a display area of the display screen.
21. An electronic device, comprising:
the display screen comprises a liquid crystal panel and a backlight module, wherein a circuit board of the liquid crystal panel forms a bending area below a non-display area of the display screen, and an opening is arranged in the bending area of the circuit board;
The light source is arranged in the opening, wherein the opening forms a light channel from the light source to a fingerprint detection area in the display screen, and the fingerprint detection area is positioned in a display area of the display screen; the method comprises the steps of,
the optical fingerprint module is arranged below the display screen and is used for detecting the optical signals of the light source irradiating the finger above the fingerprint detection area and returning from the finger.
22. The electronic device of claim 21, wherein the aperture comprises a first aperture and a second aperture, the first aperture being located in a portion of the bend region perpendicular to the display screen, the second aperture being located in a portion of the bend region parallel to the display screen on a side of the display screen.
23. The electronic device of claim 22, wherein the first aperture and the second aperture communicate at a right angle to a side of the bend region proximate the display screen.
24. The electronic device of any one of claims 21-23, wherein the light source is secured to a center of a side of the electronic device.
25. The electronic device of any one of claims 21-23, wherein the number of light sources is a plurality, a plurality of the light sources being disposed within the same or different apertures.
26. The electronic device of any one of claims 21-23, wherein the light source is an infrared light source.
27. The electronic device of any one of claims 21-23, wherein the aperture occupies a routing area on the circuit board.
28. The electronic device of any one of claims 21-23, wherein the circuit board of the light source forms a bending region below the non-display region.
29. The electronic device of any one of claims 21 to 23, wherein the chip of the liquid crystal panel is packaged in a chip-on-board (COF) or a glass-on-Chip (COG).
30. The electronic device of any one of claims 21-23, wherein the optical fingerprint module is disposed below a display area of the display screen.
31. The electronic device of any one of claims 21-23, wherein the display screen further comprises a glass cover plate, the liquid crystal panel and the backlight module are located below the glass cover plate, and a region where the liquid crystal panel and the backlight module are located forms a display region of the display screen.
32. The electronic device of any one of claims 21 to 23, wherein the circuit board of the liquid crystal panel is a flexible circuit board, FPC.
33. An electronic device, comprising:
the apparatus for fingerprint detection according to any one of claims 1 to 12; the method comprises the steps of,
a display screen according to any one of claims 13 to 20.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/107105 WO2021051412A1 (en) | 2019-09-20 | 2019-09-20 | Device for fingerprint detection, display screen and electronic apparatus |
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| Publication Number | Publication Date |
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| CN111095271A CN111095271A (en) | 2020-05-01 |
| CN111095271B true CN111095271B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201980003994.3A Active CN111095271B (en) | 2019-09-20 | 2019-09-20 | Fingerprint detection device, display screen and electronic equipment |
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| WO (1) | WO2021051412A1 (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130072971A (en) * | 2011-12-22 | 2013-07-02 | 엘지디스플레이 주식회사 | Backlgiht unit and liquid crystal display device the same |
| AU2017218933A1 (en) * | 2012-05-18 | 2017-09-07 | Apple Inc. | Capacitive sensor packaging |
| WO2018205865A1 (en) * | 2017-05-12 | 2018-11-15 | Oppo广东移动通信有限公司 | Fingerprint module, display apparatus and electronic device |
| WO2019006738A1 (en) * | 2017-07-07 | 2019-01-10 | 深圳市汇顶科技股份有限公司 | Electronic terminal, and apparatus with biometric feature recognition function |
| CN109496311A (en) * | 2018-10-26 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | Shield lower biometric devices and electronic equipment |
| CN109496314A (en) * | 2018-10-15 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | Shield lower fingerprint identification device and electronic equipment |
| CN109844765A (en) * | 2019-01-14 | 2019-06-04 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN110007497A (en) * | 2019-05-05 | 2019-07-12 | Oppo广东移动通信有限公司 | Display module and electronic device |
| CN110088768A (en) * | 2019-03-12 | 2019-08-02 | 深圳市汇顶科技股份有限公司 | Shield lower fingerprint identification device and electronic equipment |
| CN110174786A (en) * | 2019-05-05 | 2019-08-27 | Oppo广东移动通信有限公司 | Display module and electronic device |
| CN110197539A (en) * | 2018-02-27 | 2019-09-03 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition mould group and fingerprint identification door lock |
| CN110235143A (en) * | 2019-04-30 | 2019-09-13 | 深圳市汇顶科技股份有限公司 | Shield lower fingerprint identification device and electronic equipment |
| CN210605736U (en) * | 2019-09-20 | 2020-05-22 | 深圳市汇顶科技股份有限公司 | Fingerprint detection device, display screen and electronic equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10410033B2 (en) * | 2015-06-18 | 2019-09-10 | Shenzhen GOODIX Technology Co., Ltd. | Under-LCD screen optical sensor module for on-screen fingerprint sensing |
| TWI649696B (en) * | 2017-01-13 | 2019-02-01 | 致伸科技股份有限公司 | Fingerprint identifying module with indicating function |
| CN116546859A (en) * | 2017-09-05 | 2023-08-04 | 乐金显示有限公司 | Display device |
| CN108319948A (en) * | 2018-01-19 | 2018-07-24 | 深圳信炜生物识别科技有限公司 | The biological information method for sensing of electronic equipment |
| WO2020037683A1 (en) * | 2018-08-24 | 2020-02-27 | 深圳市汇顶科技股份有限公司 | Backlight module, below-screen fingerprint recognition method and apparatus, and electronic device |
| CN208922652U (en) * | 2018-10-29 | 2019-05-31 | 信利光电股份有限公司 | A kind of display module |
| WO2020177032A1 (en) * | 2019-03-01 | 2020-09-10 | 深圳市汇顶科技股份有限公司 | Fingerprint recognition apparatus and electronic device |
| CN110189633B (en) * | 2019-05-27 | 2022-01-18 | Oppo广东移动通信有限公司 | Display screen assembly, electronic device and manufacturing method of display screen assembly |
-
2019
- 2019-09-20 WO PCT/CN2019/107105 patent/WO2021051412A1/en active Application Filing
- 2019-09-20 CN CN201980003994.3A patent/CN111095271B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130072971A (en) * | 2011-12-22 | 2013-07-02 | 엘지디스플레이 주식회사 | Backlgiht unit and liquid crystal display device the same |
| AU2017218933A1 (en) * | 2012-05-18 | 2017-09-07 | Apple Inc. | Capacitive sensor packaging |
| WO2018205865A1 (en) * | 2017-05-12 | 2018-11-15 | Oppo广东移动通信有限公司 | Fingerprint module, display apparatus and electronic device |
| WO2019006738A1 (en) * | 2017-07-07 | 2019-01-10 | 深圳市汇顶科技股份有限公司 | Electronic terminal, and apparatus with biometric feature recognition function |
| CN110197539A (en) * | 2018-02-27 | 2019-09-03 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition mould group and fingerprint identification door lock |
| CN109496314A (en) * | 2018-10-15 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | Shield lower fingerprint identification device and electronic equipment |
| CN109496311A (en) * | 2018-10-26 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | Shield lower biometric devices and electronic equipment |
| CN109844765A (en) * | 2019-01-14 | 2019-06-04 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN110088768A (en) * | 2019-03-12 | 2019-08-02 | 深圳市汇顶科技股份有限公司 | Shield lower fingerprint identification device and electronic equipment |
| CN110235143A (en) * | 2019-04-30 | 2019-09-13 | 深圳市汇顶科技股份有限公司 | Shield lower fingerprint identification device and electronic equipment |
| CN110174786A (en) * | 2019-05-05 | 2019-08-27 | Oppo广东移动通信有限公司 | Display module and electronic device |
| CN110007497A (en) * | 2019-05-05 | 2019-07-12 | Oppo广东移动通信有限公司 | Display module and electronic device |
| CN210605736U (en) * | 2019-09-20 | 2020-05-22 | 深圳市汇顶科技股份有限公司 | Fingerprint detection device, display screen and electronic equipment |
Non-Patent Citations (1)
| Title |
|---|
| 液晶显示屏背光源模组表面缺陷自动光学检测系统设计;史艳琼;卢荣胜;张腾达;;传感技术学报(第05期);160-165 * |
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|---|---|
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