CN110659556A

CN110659556A - Electronic device

Info

Publication number: CN110659556A
Application number: CN201910573186.2A
Authority: CN
Inventors: 朴性彦; 李喜权
Original assignee: Samsung Display Co Ltd
Current assignee: Samsung Display Co Ltd
Priority date: 2018-06-28
Filing date: 2019-06-28
Publication date: 2020-01-07
Also published as: KR20200002048A

Abstract

An electronic device is disclosed. The electronic device includes a display panel including a front surface displaying an image and a back surface opposite to the front surface, a circuit board connected to one side of the display panel, a lower panel disposed on the back surface of the display panel and defining an opening portion, a fingerprint sensing unit including a fingerprint sensor spaced apart from a sidewall of the opening portion by a predetermined gap and accommodated in the opening portion and a sensing circuit board connecting the fingerprint sensor and the circuit board, and a light absorption cover disposed on the back surface of the display panel and overlapping the gap on a plane.

Description

Electronic device

Technical Field

The present invention relates to electronic devices, and in particular to electronic devices comprising a fingerprint sensing unit.

Background

The electronic device provides various functions capable of organic communication with a user, i.e., providing information to the user by displaying an image or sensing an input of the user, or the like.

Recent electronic devices together include a function for sensing a fingerprint of a user. As the fingerprint recognition system, there are a capacitance system that senses a change in capacitance of a capacitor formed between electrodes, an optical system that senses incident light using a photosensor, an ultrasonic system that senses vibration using a piezoelectric body or the like, and the like. In recent electronic devices, a fingerprint sensing unit for fingerprint sensing may be assembled to be disposed on the back surface of a display panel.

Disclosure of Invention

It is therefore an object of the present invention to provide an electronic device comprising a fingerprint sensing unit.

An electronic device includes a display panel including a front surface displaying an image and a back surface opposite to the front surface, a circuit board connected to one side of the display panel, a lower panel disposed on the back surface of the display panel and defining an opening portion, a fingerprint sensing unit including a fingerprint sensor spaced apart from a sidewall of the opening portion by a predetermined gap and accommodated in the opening portion, and a sensing circuit board connecting the fingerprint sensor and the circuit board, and a light absorption cover disposed on the back surface of the display panel and overlapping the gap on a plane.

The light absorbing cover may have a size greater than or equal to a planar area of the opening portion.

The light absorbing cover may be in contact with at least a portion of the sensing circuit board.

The electronic device according to an embodiment of the present invention may further include a frame accommodating the display panel and the lower panel, and the light absorption cover may be disposed on the frame and spaced apart from the lower panel in cross section.

The light absorbing cover may have a closed line shape surrounding an edge location of the fingerprint sensor.

The light absorbing cover may fill the gap and may be in contact with the back surface of the display panel.

The light absorbing cover may be arranged between the fingerprint sensor and the display panel.

The light absorbing cover may expose at least a portion of the fingerprint sensor.

The light absorbing cover may completely cover the fingerprint sensor.

The electronic device according to an embodiment of the present invention may further include an adhesive member disposed between the fingerprint sensor and the display panel.

The lower panel may include a heat sink, and the opening portion may penetrate the heat sink.

The light absorbing cover can completely cover the back surface of the display panel, and the heat sink can be attached to the light absorbing cover.

In the electronic device according to an embodiment of the present invention, the lower panel may further include a light absorbing sheet that is disposed between the heat dissipation sheet and the display panel and absorbs light, and the opening portion may penetrate the heat dissipation sheet and the light absorbing sheet.

The fingerprint sensing unit may be optically or ultrasonically driven.

An electronic device according to an embodiment of the present invention may include a display panel including a front surface displaying an image and a back surface opposite to the front surface, a circuit board connected to one side of the display panel, a lower panel disposed on the back surface of the display panel and defining an opening portion, a fingerprint sensing unit including a fingerprint sensor accommodated in the opening portion and disposed on the back surface of the display panel and a sensing circuit board connecting the fingerprint sensor and the circuit board, and a light absorption cover disposed on the back surface of the display panel and absorbing visible rays, wherein the fingerprint sensor may be spaced apart from the lower panel by a predetermined interval within the opening portion to form a gap, and the light absorbing cover may overlap at least the gap in a plane.

The light absorbing cover may be provided as at least one of a tape, a resin, and a powder.

The light absorbing cover may be disposed on a back surface of the fingerprint sensor and cover the gap.

The lower panel may include a heat sink disposed on the back surface of the display panel, and a light absorbing sheet disposed between the heat sink and the display panel, and the opening portion may penetrate the heat sink and the light absorbing sheet.

According to the present invention, it is possible to reduce a phenomenon of the back surface of the display panel being exposed, which is generated in an area adjacent to the fingerprint sensor disposed on the back surface of the display panel.

Drawings

Fig. 1a is a perspective view of an electronic device according to an embodiment of the invention.

Fig. 1b is an exploded perspective view of the electronic device shown in fig. 1 a.

Fig. 2 is a block diagram of an electronic device of the electronic device shown in fig. 1 a.

Fig. 3a is an exploded perspective view illustrating a part of the structure shown in fig. 2.

Fig. 3b is an assembled perspective view of a portion of the structure shown in fig. 3 a.

Fig. 4a is a rear view illustrating a portion of a display panel unit according to an embodiment of the present invention.

Fig. 4b is a cross-sectional view of the display panel unit shown in fig. 4 a.

Fig. 4c is a cross-sectional view of a display panel unit according to an embodiment of the present invention.

Fig. 5 is a graph illustrating light reflectance according to wavelength of a light absorbing cover according to an embodiment of the present invention.

Fig. 6a is a rear view of a display panel unit according to an embodiment of the present invention.

Fig. 6b is a cross-sectional view of the display panel unit shown in fig. 6 a.

Fig. 6c is a cross-sectional view of a display panel unit according to an embodiment of the present invention.

Fig. 7a is a rear view of a display panel unit according to an embodiment of the present invention.

Fig. 7b is a cross-sectional view of the display panel unit shown in fig. 7 a.

Fig. 8a is a rear view of a display panel unit according to an embodiment of the present invention.

Fig. 8b is a cross-sectional view of the display panel unit shown in fig. 8 a.

Fig. 9a is a rear view of a display panel unit according to an embodiment of the present invention.

Fig. 9b is a cross-sectional view of the display panel unit shown in fig. 9 a.

Fig. 9c is a cross-sectional view of a display panel unit according to an embodiment of the present invention.

Fig. 10a is an exploded perspective view of a display device according to an embodiment of the present invention.

Fig. 10b is an assembled perspective view of a display panel unit according to an embodiment of the present invention.

Fig. 10c is a rear view of the display panel unit shown in fig. 10 b.

Detailed Description

In the present specification, when a certain component (or a region, a layer, a portion, or the like) is referred to as being "on", "connected to" or "coupled to" another component, it means that it may be directly on, connected to or coupled to the other component, or a third component may be disposed therebetween.

Like reference numerals designate like constituent elements. In the drawings, the thickness, proportion, and size of the constituent elements are exaggerated for effective explanation of technical contents.

"and/or" includes all combinations that may define one or more of the associated elements.

The terms first, second, and the like may be used to describe various components, but the components should not be limited by the terms. The above terms are used only to distinguish one constituent element from other constituent elements. For example, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component, without departing from the scope of the invention. The singular encompasses the plural unless the context clearly dictates otherwise.

The terms "below", "lower", "upper" and the like are used to describe the relationship between the components shown in the drawings. The above terms are described as relative concepts with reference to the directions shown in the drawings.

Unless otherwise defined, all terms (including technical and scientific) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Also, the same terms as those defined in common usage points should be construed to have the same meaning in the context of the related art, and are explicitly defined herein without being construed as idealized or overly formal meaning.

It will be understood that terms such as "comprises" or "comprising," or the like, specify the presence of stated features, integers, steps, acts, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, acts, elements, components, or groups thereof.

Embodiments of the present invention are explained below with reference to the drawings.

Fig. 1a is a perspective view of an electronic device according to an embodiment of the invention. Fig. 1b is an exploded perspective view of the electronic device shown in fig. 1 a. Fig. 2 is a block diagram of an electronic device of the electronic device shown in fig. 1 a. The invention is explained below with reference to fig. 1a to 2.

The electronic device ED may be a device that is activated in response to an electrical signal. The electronic device ED may comprise various embodiments. For example, the electronic device ED may include a tablet computer, a notebook computer, a smart television, and the like. In the present embodiment, the electronic device ED is exemplarily shown as a smartphone.

The electronic device ED may display the image IM toward the third direction D3 on the display surface IS parallel to each of the first direction D1 and the second direction D2. The display surface IS displaying the image IM may correspond to a front surface (frontsurface) of the electronic device ED. The image IM may include a dynamic image, but may also include a static image. As an example of an image IM, an internet search window is shown in fig. 1 a.

In the present embodiment, the front surface (or front face) and the back surface (or lower face) of each component are defined with reference to the direction in which the image IM is displayed. The front surface and the back surface may be opposite to each other in a third direction D3 (opposing), and respective normal directions of the front surface and the back surface may be parallel to the third direction D3. The spaced distance between the front surface and the back surface in the third direction D3 may correspond to the thickness of the display panel DP in the third direction D3. In addition, the directions indicated by the first direction D1, the second direction D2, and the third direction D3 are used as relative concepts, which may be converted into other directions. Hereinafter, the first to third directions are directions indicated by the first direction D1, the second direction D2, and the third direction D3, respectively, which are referred to by the same reference numerals.

The front surface of the electronic device ED may be divided into a transmission area TA and a frame area BZA. The transmissive area TA may be an area where the image IM is displayed. The user views the image IM through the transmissive area TA. In the present embodiment, the transmissive area TA is illustrated as a rectangular shape with rounded corner points. However, this is merely illustrated in an exemplary manner, and the transmissive area TA may have various shapes, and is not limited to any one embodiment.

The frame area BZA is adjacent to the transmission area TA. The bezel area BZA may have a predetermined color. The frame area BZA may surround the transmission area TA. Thus, the shape of the transmissive area TA may be substantially defined by the bezel area BZA. However, this is shown only by way of example, and the bezel area BZA may also be arranged adjacent to only one side of the transmission area TA, and may also be omitted. The electronic device ED according to an embodiment of the present invention may include various embodiments and is not limited to any one embodiment.

The electronic device ED may sense the fingerprint FNG of the user applied from the outside. Accordingly, the electronic device ED may provide the display surface IS with a fingerprint sensing area FRA. In the present embodiment, the fingerprint sensing area FRA is shown as being disposed within the transmission area TA of the display image IM. However, this IS shown only by way of example, and the fingerprint sensing area FRA may also be provided in the bezel area BZA, in the entire area of the transmission area TA, or in the entire area of the display surface IS. The electronic device ED may sense a fingerprint FNG provided to the fingerprint sensing area FRA.

The user's fingerprint FNG may include a surface state of the user's hand, for example, surface uniformity or surface curvature, etc. However, this is only shown in an exemplary manner, and in case an input of an intangible substance is provided on the electronic device ED, the electronic device ED may also sense surface information of the intangible substance.

When looking at the structure of the electronic device ED with reference to fig. 1b and 2, the electronic device ED may comprise a display device DD, an electronic module EM, a power supply module PM, a frame BRK and a housing EDC. The above structure is shown in simplified form in fig. 1a and 1 b.

The display device DD includes a window unit WM and a display panel unit DU. As shown in fig. 1a, the window member WM constitutes the appearance of the electronic device ED in the assembled state. The window member WM protects the internal structure of the electronic device ED from external impact, and may be a structure that substantially provides the display surface IS of the electronic device ED.

The display panel unit DU is disposed on the back surface of the window member WM. The display panel unit DU may include a display panel DP and a fingerprint sensing unit FSU. The display panel DP may be a structure that substantially generates the image IM. The image IM generated by the display panel DP IS displayed on the display surface IS through the transmissive area TA for the user to view from the outside.

The fingerprint sensing unit FSU senses a fingerprint FNG of the user applied from the outside. As described above, the fingerprint sensing unit FSU may sense a fingerprint FNG (hereinafter, surface information including an intangible substance) of the user provided onto the fingerprint sensing area FRA. This will be explained in detail later.

The display panel unit DU is electrically connected to the electronic module EM via a flexible circuit board, not shown. The display panel unit DU may receive information on the image IM to be displayed through the electronic module EM, or may provide information on the sensed fingerprint FNG onto the electronic module EM to provide information processed based thereon to the user.

The power supply module PM supplies power necessary for the overall operation of the electronic device ED. The power supply module PM may comprise a conventional battery module.

The frame BRK is combined with the display device DD and/or the housing EDC to partition an internal space of the electronic device ED. The frame BRK provides a space in which other components may be disposed. In addition, the frame BRK may support the display device DD such that the display device DD is fixed without shaking. The frame BRK may have a coupling groove defined therein, corresponding to the shape of the electronic module EM, for fixing the electronic module EM. The frame BRK includes metal or plastic components. Although one frame BRK is exemplarily shown, the electronic apparatus ED may include a plurality of frame BRKs.

The housing EDC may be coupled to the frame BRK and/or the display device DD. In the present embodiment, the housing EDC forms the external appearance of the electronic device ED together with the window member WM. In the present embodiment, although the case EDC formed as a single piece is illustrated, the case EDC may include a plurality of bodies assembled with each other. The housing EDC may include a plurality of frames and/or plates constructed of glass, plastic, and/or metal.

The electronic module EM comprises a motherboard and various functional modules mounted to the motherboard and used for operating the electronic device ED. The motherboard may be electrically connected to the display device DD through a connector (not shown). Here, the motherboard may include a rigid type printed circuit board.

The electronic module EM may include a control module 10, a wireless communication module 20, an image input module 30, an audio input module 40, an audio output module 50, a memory 60, an external interface 70, a light emitting module 80, a light receiving module 90, a camera module 100, and the like. Some of the modules described above may be mounted to a motherboard and may be electrically connected to the motherboard by a flexible circuit board.

The control module 10 controls the overall operation of the electronic device ED. The control module 10 may be a microprocessor. For example, the control module 10 activates or deactivates the display device DD. The control module 10 may control the image input module 30, the audio input module 40, the audio output module 50, and the like according to a touch signal received from the display device DD.

The wireless communication module 20 may transmit/receive wireless signals with other terminals using bluetooth or Wi-Fi. The wireless communication module 20 may transmit/receive a voice signal using a general communication line. The wireless communication module 20 includes a transmitter 22 for modulating and transmitting a signal to be transmitted and a receiver 24 for demodulating a received signal.

The image input module 30 processes the image signal to convert it into image data that can be displayed on the display device DD. The audio input module 40 receives an external audio signal through a Microphone (Microphone) in a recording mode, a voice recognition mode, etc., and converts it into electric voice data. The audio output module 50 converts and outputs audio data received from the wireless communication module 20 or audio data stored in the memory 60 to the outside.

The external interface 70 functions as an interface for connection with an external charger, a wired/wireless data port, a card socket (e.g., a Memory card, a SIM/UIM card), etc.

The light emitting module 80 generates and outputs light. The light emitting module 80 may output infrared rays. The light emitting module 80 may include an LED device. The light receiving module 90 may sense infrared rays. The light receiving module 90 may be activated when infrared rays above a predetermined level are sensed. The light receiving module 90 may include a CMOS sensor. After the infrared part light generated by the light emitting module 80 is output, it may be reflected by an external object (e.g., a user's finger or face), and the reflected infrared part light may be incident to the light receiving module 90. The camera module 100 captures an external image.

Fig. 3a is an exploded perspective view illustrating a part of the structure shown in fig. 2. Fig. 3b is an assembled perspective view of a portion of the structure shown in fig. 3 a. An exploded perspective view of the display device DD is shown in fig. 3a, and a combined perspective view of the display panel unit DU excluding the window member WM is shown in fig. 3 b. In the following, the invention is explained with reference to fig. 3a and 3 b.

The display device DD may include a window part WM and a display panel unit DU. Specifically, the display panel unit DU includes a display panel DP, a circuit board CB, a lower panel CVP, a fingerprint sensing unit FSU, and a light absorption cover ABS.

As described above, the window member WM includes the front surface having the optically transparent transmission area TA and the frame area BZA adjacent to the transmission area TA. Since the window member WM corresponds to the window member WM shown in fig. 2, a repetitive description will be omitted hereinafter.

The display panel DP may be provided with an active area AA (refer to fig. 10b) and a peripheral area NAA (refer to fig. 10b) at a front surface. The display panel DP activates the active area AA according to an electrical signal. The display panel DP displays an image IM on the activated active area AA. The transmissive area TA may overlap at least the entirety of the active area AA.

The peripheral area NAA is adjacent to the active area AA. The peripheral area NAA may surround the edge position of the active area AA. However, this is only shown by way of example, and the peripheral area NAA may also be adjacent to only a part of the edge positions of the active area AA, and is not limited to any one embodiment.

Various signal lines or electronic devices and the like for supplying electric signals to the active area AA may be disposed in the peripheral area NAA. The peripheral area NAA may be covered by the border area BZA so as not to be seen from the outside.

The display panel DP may include a plurality of signal lines GL, DL, PL, pixels PX, and a plurality of display pads PDD. The signal lines GL, DL, PL may include gate lines GL, data lines DL, and power lines PL. The gate line GL, the data line DL, and the power line PL may transmit electrical signals different from each other, respectively.

The gate line GL extends in a first direction D1. Although the gate lines GL may be provided in plurality and arranged to be spaced apart from each other in the second direction D2, a single gate line GL is exemplarily illustrated for ease of explanation.

In addition, although not shown, the display panel unit DU may further include a gate driving circuit mounted in the display panel DP to supply an electric signal to the gate lines GL. At this time, the gate driving circuit pad supplying the electrical signal to the gate driving circuit may constitute any one of the display pads PDD. Alternatively, the display panel DP may further include a gate pad for electrical connection with a gate driving circuit disposed outside. The gate pad may constitute any one of the display pads PDD.

The data line DL extends in a second direction D2. The data line DL may be electrically insulated from the gate line GL. Although the data lines DL may be provided in plurality and arranged to be spaced apart from each other in the first direction D1, a single data line DL is exemplarily shown for ease of illustration. The data line DL is connected to a data pad constituting any one of the display pads PDD. The data line DL supplies the data signal received through the data pad to the pixel PX.

The power line PL extends in the second direction D2. The power line PL may be electrically insulated from the gate line GL and the data line DL. Although the power line PL may be provided in plurality and arranged to be spaced apart from each other in the first direction D1, a single power line PL is exemplarily shown for ease of illustration. The power line PL may supply a power signal to the pixel PX.

The pixels PX are arranged in the active area AA. Although the pixels PX may be provided in plurality and respectively connected to the corresponding signal wirings, a single pixel PX is exemplarily illustrated for ease of explanation. The pixels PX render light according to the electrical signals to realize the image IM.

The pixel PX may include a first thin film transistor TR1, a second thin film transistor TR2, a capacitor CP, and a light emitting device EMD. The first thin film transistor TR1, the second thin film transistor TR2, the capacitor CP, and the light emitting device EMD are electrically connected.

The first thin film transistor TR1 may be a switching device that controls on and off of the pixel PX. The first thin-film transistor TR1 is connected to the gate line GL and the data line DL. The first thin-film transistor TR1 is turned on according to a gate signal supplied through the gate line GL, thereby supplying a data signal supplied through the data line DL to the capacitor CP.

The capacitor CP is charged with a voltage corresponding to a potential difference between the first power signal supplied from the power line PL and the signal supplied from the first thin-film transistor TR 1. The second thin film transistor TR2 supplies the first power signal supplied from the power line PL to the light emitting device EMD corresponding to the voltage charged into the capacitor CP.

The light emitting device EMD may emit light or control the amount of light according to an electric signal. For example, the light emitting device EMD may include an organic light emitting device, a quantum dot light emitting device, an electrophoretic device, or an electrowetting device.

The light emitting device EMD is connected to a power supply terminal VSS (not shown) to receive a power signal different from the power signal supplied from the power line PL. A driving current corresponding to a difference between the electrical signal supplied from the second thin film transistor TR2 and the second power signal may flow through the light emitting device EMD, and the light emitting device EMD may generate light corresponding to the driving current.

In addition, this is merely illustrated in an exemplary manner, and the pixel PX may include electronic devices having various structures and arrangements, and is not limited to any one embodiment.

The display pad PDD is disposed in the peripheral area NAA. The display pads PDD may be connected to the signal wirings, respectively. The pixels PX may be electrically coupled with devices disposed outside the display panel DP through the display pad PDD.

The circuit board CB is coupled with the display pad PDD. The circuit board CB supplies an electrical signal to the display panel DP through the display pad PDD. The circuit board CB may generate a signal or a power signal controlling the image IM and supply it to the display panel DP. The circuit board CB may include a flexible board FPC and a driving device IC.

The flexible board FPC may be electrically connected to the display panel DP through the display pad PDD. The flexible board FPC is electrically and physically bonded to the display panel DP through an adhesive member (e.g., an anisotropic conductive film) not shown. The flexible board FPC may include signal lines not shown.

The driver device IC may be mounted on the flexible board FPC. The driving device IC may be coupled with the signal line of the flexible board FPC to be electrically connected with the display panel DP. The driving device IC generates or processes various electric signals.

The circuit board CB may be bent toward the back surface of the display panel DP after being bonded to the display panel DP. Thereby, the driving device IC may not be viewed from the front surface of the display panel unit DU.

The lower panel CVP may be coupled to a back surface of the display panel DP. The lower panel CVP may include a first sheet ST1 and a second sheet ST 2. In addition, this is merely exemplary, and the lower panel CVP according to an embodiment of the present invention may be a lower sheet or a plurality of lower sheets. Alternatively, the lower panel CVP according to an embodiment of the present invention may be other components disposed under the display panel DP, like a support body supporting the display panel DP.

The first sheet ST1 covers the back surface of the display panel DP. The first sheet ST1 may be attached to the display panel DP by an adhesive member not shown.

The first sheet ST1 may have light-shielding properties. The first sheet ST1 may include an optically opaque light blocking substance. For example, the first sheet ST1 may include a black tape (black tape). In the present invention, the display panel DP may include a transparent base substrate and pixels disposed on the base substrate. Thus, external light incident to the front surface of the display panel DP or light generated from the pixels when the display panel DP is driven may be provided toward the back surface of the display panel DP. Since the back surface of the display panel DP may be defined by the back surface of the transparent base substrate, the structure disposed on the back surface of the display panel DP may be viewed from the front surface of the display panel DP by external light or the like.

The first sheet ST1 may prevent the structure disposed on the back surface of the display panel DP from being viewed from the front surface of the display panel DP by shielding the exposure of the back surface of the display panel DP. However, this is merely illustrated in an exemplary manner, and the first sheet ST1 may be a light shielding layer formed on the back surface of the display panel DP. At this time, the first sheet ST1 may be formed by coating a substance such as carbon or chromium on the back surface of the display panel DP, and an additional adhesive member may also be omitted.

The second sheet ST2 may have heat dissipation properties. For example, the second sheet ST2 may be a sheet including a metal substance having high thermal conductivity such as copper or aluminum. The second sheet ST2 is bonded to the back surface of the first sheet ST 1. The second sheet ST2 may be bonded to the first sheet ST1 by an adhesive means not shown, or may be formed directly on the back surface of the first sheet ST 1.

In the present embodiment, the lower panel CVP may have a predetermined opening OP defined therein. The opening OP may penetrate the first sheet ST1 and the second sheet ST2 to expose the back surface of the display panel DP. Specifically, the first sheet ST1 may have a first opening portion OP1 defined therein, and the second sheet ST2 may have a second opening portion OP2 defined therein. The first opening portion OP1 and the second opening portion OP2 may be aligned to constitute an opening portion OP of the lower panel CVP when viewed from the front surface.

The fingerprint sensing unit FSU may be disposed on the back surface of the display panel DP. The fingerprint sensing unit FSU may comprise a fingerprint sensor FS and a sensing circuit board CB-F. The sensing circuit board CB-F is electrically connected with the fingerprint sensor FS.

The fingerprint sensor FS may include a sensor driven in various ways. For example, the fingerprint sensor FS may include an optical type fingerprint sensor sensing incident light using a photo sensor or an ultrasonic type fingerprint sensor sensing vibration using a piezoelectric body, and is not limited to any one driving method.

The fingerprint sensor FS according to an embodiment of the present invention may be accommodated within an opening OP defined in the lower panel CVP. Specifically, the fingerprint sensor FS may be accommodated within the first and second opening portions OP1 and OP2 and disposed on the back surface of the display panel DP. Thus, the fingerprint sensor FS may overlap the display panel DP on a plane. In fig. 3b, the area where the fingerprint sensor FS is arranged is treated and shown with dashed lines for ease of illustration. In the present embodiment, the fingerprint sensor FS may be disposed to overlap the active area AA.

The light absorbing cover ABS may include a light absorbing substance. The light absorption cover ABS may include a substance that absorbs at least light of a visible light wavelength band. For example, the light absorbing cover ABS may appear black. Further, the light absorbing cover ABS may be provided in various forms of tape, resin, powder, and the like. For example, the light absorption cover ABS may include black flocked self-adhesive paper (black flocked self-adhesive paper), black hard board paper (black hardboard paper), masking tape (masking tape), black resin (balckresin), black powder (black powder), and the like. The light absorption cover ABS may be provided in various forms as long as it can absorb light leaked from an area adjacent to the fingerprint sensor FS, and is not limited to any one embodiment.

Further, for example, the light absorbing cover ABS may also comprise substantially the same substance as the first sheet ST 1. Thus, the light absorption cover ABS can also be designed to absorb substantially the same wavelength band of light as the first sheet ST 1. Alternatively, the light absorbing cover ABS may also be designed to absorb a different light wavelength band than the first sheet ST 1. In addition, this is merely exemplary illustration, and the constituent substance of the light absorption cover ABS may be designed independently of the first sheet ST1, and is not limited to any one embodiment.

According to the present embodiment, the opening OP of the lower panel CVP may have a sufficient size to accommodate the fingerprint sensor FS. At this time, a gap GP (refer to fig. 4a) as a predetermined interval space may occur between the fingerprint sensor FS received in the opening portion OP and the lower panel CVP defining the inner surface of the opening portion OP according to a process error, a shape of the fingerprint sensor FS, or the like. The light absorption cover ABS absorbs the leaked light through a gap GP existing between the opening OP defined in the lower panel CVP and the fingerprint sensor FS.

The light absorption cover ABS covers a space between the fingerprint sensor FS and the lower panel CVP in the opening OP of the lower panel CVP at least on a plane. Thereby, a phenomenon that the back surface of the display panel DP is exposed through a space between the fingerprint sensor FS and the lower panel CVP in the opening OP can be prevented. Which will be described in detail later.

In the present embodiment, the light absorption cover ABS may be disposed on the back surface of the second sheet ST2 to cover at least the second opening portion OP 2. Further, a light absorption cover ABS may be disposed on the back surface of the fingerprint sensing unit FSU to cover the fingerprint sensor FS accommodated within the second opening portion OP 2. The light absorption cover ABS may have a size at least larger than a planar area of the second opening OP 2.

According to the present invention, the phenomenon that the back surface of the display panel DP is exposed in the area adjacent to the fingerprint sensor FS can be easily prevented. This improves outdoor visibility of the electronic device ED and improves display characteristics.

Fig. 4a is a rear view illustrating a portion of a display panel unit according to an embodiment of the present invention. Fig. 4b is a cross-sectional view of the display panel unit shown in fig. 4 a. Fig. 4c is a cross-sectional view of a display panel unit according to an embodiment of the present invention. Fig. 5 is a graph illustrating light reflectance according to wavelength of a light absorbing cover according to an embodiment of the present invention. For ease of illustration, the regions corresponding to fig. 4b are shown in fig. 4 c. Hereinafter, the present invention will be explained with reference to fig. 4a to 5. In addition, the same structures as those described in fig. 1a to 3b are given the same reference numerals, and overlapping descriptions are omitted.

As shown in fig. 4a, the circuit board CB may have a curved shape and be positioned on the back surface of the display panel DP. The driving device IC can be viewed from the back surface of the display panel unit DU. At this time, the circuit board CB may be bent while covering a portion of the back surface of the second sheet ST2 of the lower panel CVP.

In addition, the sensing circuit board CB-F may be coupled with the circuit board CB to be electrically connected with the circuit board CB. In the present embodiment, the sensing circuit board CB-F may be coupled with the circuit board CB by a predetermined connection CB-T disposed on the circuit board CB. Thereby, the fingerprint sensor FS may be electrically connected with the circuit board CB, and may substantially transmit/receive an electrical signal with the display panel DP as well. In addition, the sensing circuit board CB-F is shown in a form in which a predetermined driving device IC-F is mounted, but this is shown by way of example only, and in the sensing circuit board CB-F, the driving device IC-F may also be omitted, and is not limited to any one embodiment.

The sensing circuit boards CB-F may be partially received in the opening OP. For example, a portion of the sensing circuit board CB-F on a side connected to the fingerprint sensor FS may overlap the first opening portion OP1 and the second opening portion OP 2. The remaining portion of the sensing circuit board CB-F may extend toward the outside of the second opening portion OP2 and be coupled with the circuit board CB. However, this is merely described by way of example, and the entire portion of the sensing circuit board CB-F may be also received in the opening OP defined in the lower panel CVP according to the shape and size of the sensing circuit board CB-F, and is not limited to any one embodiment.

The light absorption cover ABS according to an embodiment of the present invention may be provided to cover the opening OP. As described above, the opening portion OP may be defined by the first opening portion (OP1, refer to fig. 3a) and the second opening portion (OP2, refer to fig. 3a), and in the present embodiment, the first opening portion OP1 and the second opening portion OP2 are shown to be aligned in the same shape. However, this is merely illustrated in an exemplary manner, and the first opening portion OP1 and the second opening portion OP2 may have different shapes from each other, or may also be arranged in a partially staggered state in cross section.

The fingerprint sensor FS accommodated in the opening OP is also covered by the light absorption cover ABS by covering the opening OP with the light absorption cover ABS. In addition, in the present embodiment, a portion of the sensing circuit board CB-F, which is connected to the fingerprint sensor FS and overlaps the opening OP, may be covered by the light absorption cover ABS.

The light absorption cover ABS may be provided to a size greater than or equal to an area of the opening OP. The light absorbing cover ABS may have various shapes on a plane. For example, the light absorbing cover ABS may have a circular, elliptical or polygonal shape. The light absorption cover ABS may have a diameter, width or diagonal larger than that of the opening OP. The light absorption cover ABS may cover the entire opening OP, and may extend to overlap the lower panel CVP to cover at least a portion of the lower panel CVP.

In an embodiment of the present invention, in the case where the thickness of the fingerprint sensor FS is greater than that of the lower panel CVP, accordingly, in the case where the fingerprint sensor FS protrudes from the back surface of the second sheet ST2 when viewed in cross section, the light absorption cover ABS may also have a predetermined curved portion to cover the protruding portion of the fingerprint sensor FS. In this case, the light absorption cover ABS may be provided in a size larger than the area of the opening OP.

As described above, the lower panel CVP prevents the back surface of the display panel DP from being exposed. However, since the opening OP defined in the lower panel CVP exposes the back surface of the display panel DP, a defect that the back surface of the display panel DP is exposed may occur through the opening OP of the lower panel CVP.

As described above, the light absorption cover ABS may include a substance that absorbs light. The reflectance according to the wavelength of Black Flocked Self-Adhesive Paper (Black Flocked Self-Adhesive Paper) is shown in fig. 5. As shown in fig. 5, the graph PLT shows high absorbance for light having a wavelength band below about 0.7 um. The wavelength band below 0.7um may be a wavelength band including most of visible light except a part of long wavelength light of red light (about 620nm to about 780nm) among visible light having a wavelength range of about 380nm to about 780 nm. Thus, since the light absorbing cover ABS comprises black flocked self-adhesive paper, a large part of the wavelength range of the visible light strip is absorbed.

According to the present embodiment, the fingerprint sensor FS may be accommodated in a predetermined space defined by the back surface of the display panel DP, the lower panel CVP, and the light absorption cover ABS when viewed in cross section. Thereby, even if the size on the plane of the fingerprint sensor FS is provided to be less than or equal to the plane area of the opening OP so as to form the predetermined gap GP between the lower panel CVP and the fingerprint sensor FS, it can be stably shielded by the light absorption cover ABS.

The gap GP in the opening OP may be a region where light leakage or the like is likely to occur on the front surface of the display panel unit DU. Thus, when the display panel unit DU is in the closed state or in the state of displaying a dark image, the gap GP in the opening OP may cause the appearance phenomenon of the back surface of the display panel unit DU. Since the electronic device ED according to the invention further comprises a light absorbing cover ABS, the defects of the display panel back surface revealing in the area adjacent to the fingerprint sensor FS can be eliminated.

In addition, referring to fig. 4c, the display panel unit DU-S according to an embodiment of the present invention may further include an adhesive member RS disposed between the fingerprint sensor FS and the display panel DP. The adhesive member RS improves a physical coupling force between the display panel DP and the fingerprint sensor FS. This reduces the fluidity of the fingerprint sensor FS in the opening OP, and improves the reliability of the display panel unit DU-S.

The adhesive member RS may be optically transparent. For example, the adhesive part RS may include at least one of an Optically Clear Resin (OCR), an Optically Clear Adhesive (OCA), and a Pressure Sensitive Adhesive (PSA). In this case, even if the fingerprint sensor FS is optically operated, the problem of the drop in the amount of light caused by the adhesive member RS to the fingerprint sensor FS can be reduced. Thereby, the fingerprint sensor FS can be stably coupled to the display panel DP regardless of the operation manner of the fingerprint sensor FS.

Alternatively, the adhesive member RS may be optically opaque. For example, the adhesive member RS may also include a light absorbing substance. In the case where the fingerprint sensor FS operates in an ultrasonic manner, since the fingerprint sensor FS is closely bonded to the display panel DP, the adhesive member RS having a plurality of colors may be included without limiting the material thereof as long as it has adhesiveness, and thus may be economically efficient.

In addition, this is merely illustrated in an exemplary manner, and may be combined in various manners as long as the fingerprint sensor FS may be stably combined opposite to the back surface of the display panel DP through the opening OP defined in the lower panel CVP, and is not limited to any one embodiment.

Fig. 6a is a rear view of a display panel unit according to an embodiment of the present invention, fig. 6b is a sectional view of the display panel unit shown in fig. 6a, and fig. 6c is a sectional view of the display panel unit according to an embodiment of the present invention. For ease of explanation, the region corresponding to fig. 4a is shown in fig. 6a, and the region corresponding to fig. 4b is shown in each of fig. 6b and 6 c. In the following, the invention is explained with reference to fig. 6a and 6 b. In addition, the same reference numerals are given to the same structures as those described in fig. 1a to 5, and redundant description is omitted.

As shown in fig. 6a, the display panel unit DU-1 may include a light absorption cover ABS-1 having a shape exposing at least a portion of the fingerprint sensor FS. The light absorption cover ABS-1 may have a shape on a plane for covering at least a gap formed between the fingerprint sensor FS and the lower panel CVP. Thus, the light absorption cover ABS-1 may have a closed line shape defined along an edge position of the fingerprint sensor FS.

The light absorbing cover ABS-1 may be provided in a variety of forms. For example, referring to fig. 6b, the light absorbing cover ABS-1 may be arranged to cover a gap between the fingerprint sensor FS and the second sheet ST 2. For example, the light absorption cover ABS-1 may extend along an edge position of the fingerprint sensor FS and an edge position of the opening OP. The light absorbing cover ABS-1 may be provided as a thermosetting or light-curing resin or in the form of a tape. Thereby, a predetermined space may be provided between the light absorption cover ABS-1 and the display panel DP in cross section.

Alternatively, for example, referring to fig. 6c, the light absorbing cover ABS-1A may be closely attached to the display panel DP to fill the gap. The light absorbing cover ABS-1A may be provided in a form such as a thermosetting resin, a light-curing resin, or a powder having high fluidity. The space in the opening OP except for the space occupied by the fingerprint sensor FS is completely filled with the light absorption cover ABS-1A to block the path of light for viewing the fingerprint sensor FS from the outside. Thereby, the phenomenon that the back surface of the display panel DP is exposed can be effectively improved.

Fig. 7a is a rear view of a display panel unit according to an embodiment of the present invention, and fig. 7b is a sectional view of the display panel unit shown in fig. 7 a. For ease of illustration, the region corresponding to fig. 4a is shown in fig. 7a, and the region corresponding to fig. 4b is shown in fig. 7 b. In the following, the invention is explained with reference to fig. 7a and 7 b. In addition, the same reference numerals are given to the same structures as those described in fig. 1a to 5, and redundant description is omitted.

In the display panel unit DU-2, a light absorbing cover ABS-2 may be arranged between the display panel DP and the fingerprint sensor FS. When viewed from the back surface, an area of the back surface of the display panel DP exposed by the opening OP, which is not covered by the fingerprint sensor FS, is covered by the light absorption cover ABS-2. Thereby, even if there is a gap between the fingerprint sensor FS and the opening OP, a defect of the back surface of the display panel exposed to view through the gap can be easily blocked by the light absorbing cover ABS-2.

In the present embodiment, the light absorption cover ABS-2 may expose a region of the fingerprint sensor FS where light is absorbed through the display panel DP. Thereby, in case that the fingerprint sensor FS is optically operated, an influence of the light absorption cover ABS-2 on the fingerprint sensor FS can be prevented. In addition, this is merely illustrated by way of example, and in the case where the fingerprint sensor FS operates in an ultrasonic manner, the light absorption cover ABS-2 may also cover the front surface of the fingerprint sensor FS, and is not limited to any one embodiment.

Fig. 8a is a rear view of a display panel unit according to an embodiment of the present invention, and fig. 8b is a sectional view of the display panel unit shown in fig. 8 a. For ease of illustration, the region corresponding to fig. 4a is shown in fig. 8a, and the region corresponding to fig. 4b is shown in fig. 8 b. In the following, the invention is explained with reference to fig. 8a and 8 b. In addition, the same reference numerals are given to the same structures as those described in fig. 1a to 5, and redundant description is omitted.

In the display panel unit DU-3, the light absorbing cover ABS-3 may also be arranged spaced apart from the fingerprint sensor FS. In this embodiment, the light absorbing cover ABS-3 is disposed on the frame BRK. The light absorbing cover ABS-3 may have a shape on a plane covering at least the opening OP.

In this embodiment, the light absorbing cover ABS-3 may not be combined with the lower panel CVP or the fingerprint sensing unit FSU. Thus, the light absorption cover ABS-3 may be provided without limitation in shape or adhesive property as long as it has a size greater than or equal to the opening OP and can be stably coupled to the frame BRK. Accordingly, the light absorption cover ABS-3 can be disposed in various shapes, sizes, adhesiveness regardless of the thickness of the fingerprint sensor FS, the surface state of the back surface of the fingerprint sensor FS, the degree of adhesion to the lower panel CVP, and the interference with the sensing circuit board CB-F, etc., so that the degree of freedom of the light absorption cover ABS-3 can be improved.

Fig. 9a is a rear view of a display panel unit according to an embodiment of the present invention, fig. 9b is a sectional view of the display panel unit shown in fig. 9a, and fig. 9c is a sectional view of the display panel unit according to an embodiment of the present invention. For ease of illustration, the region corresponding to fig. 4a is shown in fig. 9a, and the region corresponding to fig. 4b is shown in fig. 9 b. The invention is explained below with reference to fig. 9a and 9 b. In addition, the same reference numerals are given to the same structures as those described in fig. 1a to 5, and redundant description is omitted.

In fig. 9a, the light absorbing cover ABS-4 is shown as shaded and projected for ease of illustration. As shown in fig. 9a and 9b, in the display panel unit DU-4, the light absorption cover ABS-4 may be disposed between the display panel DP and the lower panel CVP. At this time, the light absorption cover ABS-4 may completely cover the back surface of the display panel DP. Since the light absorption cover ABS-4 completely covers the back surface of the display panel DP, a portion exposed through the opening OP of the lower panel CVP may be a portion of the light absorption cover ABS-4. Therefore, even if a gap is generated between the fingerprint sensor FS and the lower panel CVP, the back surface of the display panel DP may be covered by the light absorption cover ABS-4, thereby blocking the occurrence of defects exposed at the back surface of the display panel.

In addition, in the present invention, the fingerprint sensor FS may be ultrasonically driven. Therefore, even though the light absorption cover ABS-4 is interposed between the fingerprint sensor FS and the display panel DP, the fingerprint sensor FS can stably receive vibrations transmitted through the display panel DP and the light absorption cover ABS-4 to sense a fingerprint.

In addition, as shown in FIG. 9c, in the display panel unit DU-4, the first sheet ST1 may also be omitted. Thus, the lower panel CVP-1 may be composed of the second sheet ST2 and the light absorption cover ABS-4, and the second sheet ST2 may be combined with the light absorption cover ABS-4. According to the present invention, the light absorption cover ABS-4 replaces the function of the first sheet ST1, and thus the thickness of the display panel unit DU-4 is reduced, so that the portability and assemblability of the display panel unit DU-4 can be improved.

Fig. 10a is an exploded perspective view of a display device according to an embodiment of the present invention. Fig. 10b is an assembled perspective view of a display panel unit according to an embodiment of the present invention. Fig. 10c is a rear view of the display panel unit shown in fig. 10 b. Hereinafter, the present invention will be explained with reference to fig. 10a to 10 c. In addition, the same reference numerals are given to the same structures as those described in fig. 1a to 9b, and redundant description is omitted.

As shown in fig. 10a, the display device DD10 includes a window member WM and a display panel unit DU 10. Since the window member WM corresponds to the window member WM shown in fig. 1a, a repetitive description will be omitted.

The display panel unit DU10 may include a display panel DP10, a circuit board CB10, a touch sensor TS, a lower panel CVP, a fingerprint sensing unit FSU, and a light absorption cover ABS. The display panel DP10 may have a shape in which one side protrudes on a plane. In the present embodiment, the display panel DP10 may include a planar portion PP and a protruding portion RP. The protruding portion RP has a shape protruding from one side of the planar portion PP toward the first direction D1. In the present embodiment, the pad PDD may be disposed at the protrusion RP. In addition, since the signal lines DL, GL, PL, the pixels PX, and the pads PDD constituting the display panel DP10 correspond to the structure of the display panel DP (refer to fig. 3a) shown in fig. 3a, a repetitive description will be omitted hereinafter.

The touch sensor TS may be disposed on the display panel DP 10. The touch sensor TS may sense an external input to obtain position or intensity information of the external input. The external input may include a variety of embodiments. For example, the external input includes a part of a user's body, external input of various forms of light, heat, pressure, or the like. Further, the touch sensor TS may sense not only an input contacting the touch sensor TS but also an input close or adjacent thereto.

The touch sensor TS may include a sensing area SA and a non-sensing area NSA (not shown). The sensing area SA may overlap the transmission area TA. In the present embodiment, the active area AA may be an area including a sensing area SA and a transmitting area TA.

The non-sensing area NSA is adjacent to the sensing area SA. The non-sensing area NSA may surround an edge position of the sensing area SA. However, this is merely illustrated by way of example, and the non-sensing area NSA may also be adjacent to only a portion of the edge position of the sensing area SA, or may also be omitted, without being limited to any one embodiment.

The sensing electrodes SS are disposed in the sensing region SA. Sense electrode SS may include a first sense electrode SP1 and a second sense electrode SP2 that receive different electrical signals from each other. The sensing electrode SS may obtain information about an external input TC (not shown) through a change in capacitance between the first sensing electrode SP1 and the second sensing electrode SP 2.

The first sensing electrode SP1 extends in the second direction D2. The first sensing electrode SP1 may include a plurality of conductive patterns connected to each other in the second direction D2. The first sensing electrode SP1 may be provided in plurality and arranged to be spaced apart from each other along the first direction D1.

The second sensing electrode SP2 extends in the first direction D1. The second sensing electrode SP2 may include a plurality of conductive patterns connected to each other in the first direction D1. The second sensing electrodes SP2 may be provided in plurality and arranged to be spaced apart from each other along the second direction D2.

The sensing lines SL1, SL2 and the sensing pads PDT are disposed in the non-sensing area NSA. The sensing pads PDT are connected to sensing lines SL1, SL2, respectively. The sensing lines SL1, SL2 include a first sensing line SL1 and a second sensing line SL 2. The first sensing line SL1 connects the first sensing electrode SP1 with the sensing pad PDT to transfer an electrical signal provided from the outside to the first sensing electrode SP1 through the sensing pad PDT. The second sensing line SL2 connects the second sensing electrode SP2 with the sensing pad PDT to transfer an electrical signal provided from the outside to the second sensing electrode SP2 through the sensing pad PDT.

The sensing pads PDT may extend to the protruding side of the display panel DP10 to be electrically connected with the display panel DP 10. Alternatively, the sensing pads PDT may be disposed on other layers separate from the pads PDD of the display panel DP 10.

The touch sensor TS may be directly disposed on the display panel DP 10. For example, the sensing electrode SS or the sensing lines SL1, SL2 may be directly formed on the display panel DP 10. Alternatively, the touch sensor TS may be attached to the display panel DP10 by an adhesive member or the like, not shown, after being formed separately from the display panel DP 10. Alternatively, the touch sensor TS may be disposed on the back surface of the display panel DP10, or built in the display panel DP 10. The touch sensor TS according to an embodiment of the present invention may be provided in various forms and is not limited to any one embodiment.

The circuit board CB10 is coupled to one side of the display panel unit DU 10. Specifically, the circuit board CB10 may be bonded to the first side S1 of the display panel unit DU 10. The first side S1 of the display panel unit DU10 may be a portion corresponding to the protruding protrusion RP of the display panel DP 10. The circuit board CB10 is bonded to the protrusion RP of the display panel DP10 to be electrically coupled with the pad PDD of the display panel DP 10. In addition, the circuit board CB10 may be electrically coupled to the sensing pads PDT. Thus, the display panel DP10 and the touch sensor TS can be driven by one circuit board CB 10. However, this is merely illustrated by way of example, and the circuit board CB10 may be additionally provided for each of the display panel DP10 and the touch sensor TS, and is not limited to any one embodiment.

As shown in fig. 10b and 10c, the first side S1 of the display panel unit DU10 may be bent in the opposite direction of the third direction D3, i.e., toward the back surface of the display panel unit DU 10. As described above, the first side S1 of the display panel unit DU10 may be the protrusion RP of the display panel DP10 coupled with the circuit board CB 10.

In the present invention, the protrusion RP of the display panel DP10 may be bent toward the back surface of the display panel DP 10. The bending of the protrusion RP may correspond to the bending of the first side S1 of the display panel unit DU 10. As the first side S1 of the display panel unit DU10 is bent, the circuit board CB10 may be assembled in a state of being positioned on the back surface of the display panel DP 10. The structure shown in fig. 10c may substantially correspond to the structure shown in fig. 4a except that the first side S1 of the display panel unit DU10 is bent and positioned on the back surface of the display panel DP 10. Hereinafter, duplicate explanation is omitted. According to the present invention, even if the circuit board CB10 is rigid, since one side of the display panel unit DU10 can be bent, it is possible to position and bond the circuit board CB10 to the back surface of the display panel DP 10.

In addition, the display panel unit DU10 may also include a plurality of sides that are curved. Illustrated is a case where the display panel unit DU10 according to the present embodiment extends in the first direction D1, and the second and third sides S2 and S3 opposite in the second direction D2 are bent toward the opposite direction of the third direction D3. In the present embodiment, a portion of the display surface IS10 of the display panel unit DU10 may be bent, and portions defined at the second and third sides S2 and S3 in the active area AA may be bent. The second and third sides S2 and S3 may correspond to two corners spaced apart with the protrusion RP therebetween, among the corners of the display panel DP 10.

Thus, since the electronic device ED10 (not shown) according to an embodiment of the present invention includes the display panel unit DU10 having at least one side bent, the area of the bezel region BZA can be reduced and an enhanced aesthetic sense can be achieved. However, this is merely illustrated by way of example, at least any one of the first side S1, the second side S2, and the third side S3 may not be bent, or four sides of the display panel unit DU10 may be bent, and is not limited to any one embodiment. The electronic device ED10 according to an embodiment of the present invention may include a display panel unit of various shapes and is not limited to any one embodiment.

According to the present invention, even if at least one side of the display panel unit DU10 is bent, since the defect of the back surface exposure of the display panel DP10 generated in the area adjacent to the fingerprint sensor FS can be eliminated, the electronic device ED10 with improved display characteristics can be provided.

It should be understood that although the foregoing has been described with reference to the preferred embodiments of the present invention, various modifications and changes can be made by those skilled in the art or those skilled in the art without departing from the spirit and scope of the present invention as set forth in the appended claims.

Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined only by the claims.

Description of the reference numerals

DP: a display panel CB: circuit board

And (3) FSU: fingerprint sensing unit FS: fingerprint sensor

CB-F: ABS of the sensing circuit board: light absorbing cover

Claims

1. An electronic device, comprising:

a display panel including a front surface displaying an image and a back surface;

a circuit board connected to one side of the display panel;

a lower panel disposed on the back surface of the display panel and defining an opening portion;

a fingerprint sensing unit, the fingerprint sensing unit comprising:

a fingerprint sensor spaced apart from a sidewall of the opening portion by a predetermined gap and accommodated in the opening portion; and

a sensing circuit board connecting the fingerprint sensor and the circuit board; and

a light absorbing cover overlapping the gap in a plane.

2. The electronic device of claim 1, wherein the light absorbing cover has a size greater than or equal to a planar area of the opening portion.

3. The electronic device of claim 2, further comprising:

a frame accommodating the display panel and the lower panel, an

Wherein the light absorbing cover is disposed on the frame and spaced apart from the lower panel.

4. The electronic device of claim 1, wherein the light absorbing cover fills the gap and is in contact with the back surface of the display panel.

5. The electronic device of claim 1, wherein the light absorbing cover is disposed between the fingerprint sensor and the display panel.

6. The electronic device of claim 5, wherein the light absorbing cover completely covers the fingerprint sensor.

7. The electronic device of claim 1, further comprising:

an adhesive member disposed between the fingerprint sensor and the display panel.

8. The electronic device of claim 1, wherein the lower panel comprises a heat sink, the opening portion extends through the heat sink, the light absorbing cover completely covers the back surface of the display panel, and the heat sink is attached to the light absorbing cover.

9. The electronic device of claim 1, wherein the fingerprint sensing unit is optically or ultrasonically driven.

10. The electronic device of claim 1, wherein the one side of the display panel is curved toward the back surface of the display panel.