WO2019088549A1 - Method for acquiring fingerprint image and electronic device supporting same - Google Patents

Abstract

Disclosed is an electronic device comprising: an illumination sensor, a light-emitting unit, a biometric sensor, and a processor, wherein the processor is configured to: sense illumination external to the electronic device through the illumination sensor; when the external illumination falls within a first specified range, acquire a first image for an object external to the electronic device through the biometric sensor in a state of outputting light from the light-emitting unit; when the external illumination falls within a second specified range, acquire a second image for the object through the biometric sensor in a state of not outputting light from the light-emitting unit, acquire a third image for the object in a state of outputting light from the light-emitting unit, and process the third image by using the second image; and perform authentication for the object by using the first image or the processed third image according to the external illumination. Various other embodiments are also possible which are known from the specification.

Description

Fingerprint image acquisition method and electronic device supporting the same

The embodiments disclosed herein relate to fingerprint image acquisition techniques.

In the case of electronic devices, such as smart phones, which are becoming essential items for users, user authentication for protecting personal information has become an important function, and technologies related to user authentication have been actively developed.

Fingerprint recognition technology is one of the most commonly used techniques in user authentication technology. The electronic device having the fingerprint sensor to which the fingerprint recognition technology is applied can authenticate the user by comparing the fingerprint information collected in the user authentication with the registered fingerprint information through the fingerprint registration process.

Meanwhile, in recent years, research and development for increasing the screen size in electronic devices such as a smart phone have been continuously performed as users who prefer a large screen have increased. For example, the electronic device may be configured such that the display occupies most of the area on the front side.

A fingerprint sensor, which is usually disposed in a non-display area of the screen, can be disposed in the display area of the screen because the electronic device having the front-most display is no or small in the non-display area such as the bezel and the like. In this case, an optical fingerprint sensor can be used, and a light source included in the display 130 (e.g., a backlight unit (BLU), a light emitting diode (LED) A diode (OLED) or the like) may be used as the light emitting portion.

When acquiring a fingerprint image using an optical fingerprint sensor, a filter may be disposed on a light receiving portion of the optical fingerprint sensor to reduce the influence of external light. For example, since some components of external light (e.g., red component and infrared component of visible light) transmit through the user's finger, a filter (e.g., Red ~ IR cut filter may be disposed on the upper layer of the light receiving portion of the optical fingerprint sensor.

However, in the presence of strong external light (e.g., sunlight) as in an outdoor environment, since the filter does not completely block the external light, the light passing through the filter is saturated in the pixels included in the light- saturation phenomenon may occur. For example, scattering may occur in the finger area while strong external light is transmitted through the finger, and thus the fingerprint area is captured in a bright saturated state, so that it may be difficult to obtain a clear fingerprint image.

The embodiments disclosed in this document can be applied to a method of acquiring a fingerprint image by setting a sensing time (or an integration time) of an optical fingerprint sensor and a capture routine of a fingerprint differently based on the external illuminance, It is possible to provide a supporting electronic device.

An electronic device according to an embodiment disclosed in this document includes an illuminance sensor, a light emitting portion, a living body sensor, and a processor, wherein the processor senses the illuminance outside the electronic device through the illuminance sensor, Acquires a first image with respect to an object outside the electronic device through the biosensor in a state of outputting light from the light emitting unit when the illuminance belongs to the first specified range, Acquiring a second image for the object through the biosensor in a state in which the light is not output from the light emitting unit, acquiring a third image for the object in a state of outputting light from the light emitting unit, And processing the third image using the second image and using the first image or the processed third image according to the external illumination It may be set to perform authentication for the object.

Further, an electronic device according to an embodiment disclosed in this document includes a light emitting portion, a living body sensor, and a processor, wherein the processor senses the illuminance outside the electronic device through the living body sensor, Acquires a first image of an object outside the electronic device through the biosensor in a state of outputting light from the light emitting unit when the external illuminance falls within a first designated range, Acquiring a second image of the object through the biosensor in a state in which the light is not output from the light emitting unit and obtaining a third image of the object in a state of outputting light by the light emitting unit, Processing the third image using the second image; and processing the third image using the first image or the processed third image, It can be configured to perform authentication for the object.

According to another aspect of the present invention, there is provided a method of acquiring a fingerprint image of an electronic device, including: acquiring an external illuminance measured through an illuminance sensor; setting a sensing time of the fingerprint sensor based on the external illuminance; A first fingerprint image captured through the fingerprint sensor while the light emitting unit is turned on and a second fingerprint image captured through the fingerprint sensor while the light emitting unit is turned off, Obtaining an image, and acquiring a third fingerprint image used for fingerprint recognition based on the first fingerprint image and the second fingerprint image.

According to the embodiments disclosed in this document, a clear fingerprint image can be obtained irrespective of the environment in which the fingerprint is captured. In addition, various effects can be provided that are directly or indirectly understood through this document.

1 illustrates an electronic device having a fingerprint sensor according to one embodiment.

2 is an exploded perspective view of the electronic device of FIG. 1 according to one embodiment.

3 is a cross-sectional view taken along line A-A 'of the electronic device of FIG. 1 according to an embodiment.

4 is a view for explaining the influence of external light in capturing a fingerprint according to an embodiment.

5 is a block diagram of an electronic device according to one embodiment.

6 is a diagram illustrating a method of operating an electronic device associated with fingerprint image acquisition according to an exemplary embodiment.

7 is a diagram illustrating a method of operating an electronic device associated with a fingerprint image acquisition in a low-illuminance environment according to an exemplary embodiment.

8 is a view for explaining a method of acquiring a fingerprint image by minimizing the influence of external light according to an embodiment.

9 is a block diagram of an electronic device in a network environment in accordance with various embodiments.

In the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

1 is an exploded perspective view of the electronic device of FIG. 1 according to an embodiment, and FIG. 3 is a cross-sectional view of the electronic device of FIG. ≪ RTI ID = Sectional view taken along line A-A 'of FIG.

1 to 3, an electronic device 100 according to an embodiment includes a housing 110, a cover glass 120, a display 130, an illuminance sensor 140, a fingerprint sensor 150, a bracket (not shown) 160, a printed circuit board 170, a battery 181 and a back cover 190. [ However, the configuration of the electronic device 100 is not limited thereto. According to various embodiments, electronic device 100 may omit at least one of the components described above, and may further include at least one other component.

Referring to FIG. 1, the housing 110 includes a first surface (hereinafter referred to as the front surface) facing the first direction, a second surface (hereinafter referred to as the rear surface) facing the second direction opposite to the first direction, And a side surface that partially surrounds the space between the rear surface and the rear surface. In this document, the side refers to a surface that is visually seen when the thinner surface of the electronic device 100 is viewed, and the front surface refers to a surface excluding a side surface, and a surface that is output through the display 130 is exposed to the outside , And the rear surface means the surface facing the front surface. In some embodiments, some of the screen of the display 130 may be exposed to the outside through the rear and / or side surfaces, but unlike the rear and / or side, most of the area may display the screen of the display 130 Can be provided. For example, most of the front surface is composed of the display area 101 and non-display areas 103 and 105 are formed in some areas. 1, the first non-display area 103 is positioned at the upper end of the display area 101 and the second non-display area 105 is positioned at the lower end of the display area 101. [ According to one embodiment, at least one of the first non-display area 103 or the second non-display area 105 may be omitted. For example, at least one of the first non-display area 103 or the second non-display area 105 is omitted depending on the type of the electronic device 100, and the display area 101 is divided into the first non-display area 103 ) Or the second non-display area 105 is omitted.

According to an embodiment, the illuminance sensor 140 may be exposed to the outside through the first non-display area 103 or the second non-display area 105. For example, as in FIG. 1, the illuminance sensor 140 may be exposed to the outside through the first non-display area 103.

According to one embodiment, the display area 101 may include a fingerprint sensing area 107. For example, when the housing 110 is viewed from the front, the fingerprint sensor 150 may be positioned at a position aligned with the fingerprint sensing area 107 included in the display area 101.

2, the cover glass 120 includes at least one component (e.g., a display 130) that covers a portion of the exterior of the electronic device 100 and is seated in a housing (e.g., the housing 110 of FIG. 1) Etc.) from the outside. According to one embodiment, the cover glass 120 can be coupled to the housing 110 with a space in which the components of the electronic device 100 can be received inside the housing 110. [ In one example, the cover glass 120 may form at least a portion of the front surface of the electronic device 100. As another example, the cover glass 120 may form the entirety of the front surface of the electronic device 100. As another example, the cover glass 120 may form part of the front and side surfaces of the electronic device 100. The cover glass 120 may be provided substantially in a plane or may be provided with a curved surface at least a part of the upper, lower, left and / or right ends. The cover glass 120 is provided with at least a part of the transparent material (or a transparent member), and the screen output through the display 130 can be displayed externally through the transparent area of the cover glass 120. The cover glass 120 may be provided, for example, of a material such as tempered glass, plastic (e.g., PET), aluminum oxide, or the like.

The display 130 may be disposed underneath the cover glass 120. The display 130 may be positioned inside the housing 110 by curving at least a part of the left end, the right end, the upper end, and / or the lower end to form a curved surface. According to one embodiment, the display 130 may occupy most of the front of the electronic device 100.

The display 130 may display various contents. The display 130 includes a polymer layer, a plurality of display components coupled on one side of the polymer layer, and a plurality of display components coupled to the polymer layer and electrically coupled to the plurality of display elements, Conductive lines. The polymer layer may be formed of a flexible material so that at least a part of the polymer layer may be bent in the backward direction. According to one embodiment, the polymer layer may comprise polyimide. The plurality of display elements may be arranged in a matrix on one side of the polymer layer to form pixels of the display 130, and may include a fluorescent material or an organic fluorescent material capable of expressing colors. According to one embodiment, the plurality of display devices may include an organic light emitting diode (OLED). The conductive line may include at least one gate signal line or at least one data signal line. According to an embodiment, a plurality of gate signal lines and a plurality of data signal lines may be arranged in a matrix, and the plurality of display elements may be aligned and electrically connected adjacent to a point where the lines intersect.

According to one embodiment, the display 130 may be coupled to a display drive circuit (DDI). The display driving circuit may be electrically connected to the conductive line. The display driving circuit may include a driver IC for providing a driving signal and a video signal to the display 130 or a timing controller (T-con) for controlling the driving signal and the video signal. The driver IC includes a gate driver IC (gate driver IC) for sequentially selecting gate signal lines of the display 130 and applying a scan signal (or a driving signal) And a data driver IC (or a source driver IC) for applying a voltage to the line. According to one embodiment, when the gate driver IC selects the gate signal line and applies a scan signal to change the display device to an active state, the data driver IC outputs a video signal to the corresponding display device As shown in FIG. The timing controller can prevent a display time difference that may occur in the process of outputting the screen to the display 130 by adjusting a transmission time of a signal transmitted to the driver IC.

The illuminance sensor 140 may measure the external illuminance (or ambient illuminance) of the electronic device 100.

The fingerprint sensor 150 may include an optical fingerprint sensor. For example, the fingerprint sensor 150 can obtain the fingerprint image by sensing the reflected light when the light emitted from the light emitting unit (e.g., LED or OLED included in the display 130) is reflected on the fingerprint of the user. According to one embodiment, the fingerprint sensor 150 may include a light receiving portion (e.g., an image sensor) that receives light incident on the user's fingerprint. The light receiving unit may be composed of a plurality of pixels. In this case, the fingerprint sensor 150 may acquire a fingerprint image using at least a part of the optical signals received by the pixels. According to one embodiment, the fingerprint sensor 150 may be electrically connected to the processor 183 mounted on the printed circuit board 170. Accordingly, the processor 183 can receive the fingerprint image from the fingerprint sensor 150. [

3, a filter 151 (for example, Red to IR cut filter) for blocking light components of a specified wavelength band may be disposed on the upper layer of the fingerprint sensor 150.

The bracket 160 may be provided in the same or similar size as the cover glass 120 and may fix and support the display 130, the illuminance sensor 140 or the fingerprint sensor 150. According to one embodiment, the bracket 160 may be coated with an adhesive material or may include an adhesive layer in at least some areas where the display 130 contacts the display 130 so that the display 130 may be fixed. In some embodiments, the cover glass 120 may be secured to the bracket 160 via an adhesive member, a screw member, or the like.

The printed circuit board 170 may be disposed on the lower layer of the bracket 160, and various electronic components may be mounted on the printed circuit board 170. For example, at least one electronic component or circuit line or the like may be disposed on the printed circuit board 170, and at least a portion of the electronic components may be electrically connected. The electronic components may include, for example, a processor 183 or memory 185 and the like. According to various embodiments, the display driving circuit may be electrically connected to the printed circuit board 170, or may be disposed on the printed circuit board 170. The illuminance sensor 140 and the fingerprint sensor 150 may also be electrically connected to the printed circuit board 170. 2 shows a state in which the printed circuit board 170 is integrally provided, the present invention is not limited to this. According to various embodiments, a plurality of printed circuit boards 170 may be provided, and at least some of the plurality of printed circuit boards 170 may be electrically connected to each other.

The battery 181 may supply power to the electronic device 100. For example, the battery 181 may be electrically connected to the internal components of the electronic device 100 to apply power.

The back cover 190 may form the back exterior of the electronic device 100. According to one embodiment, the rear cover 190 may be detachably attached to the housing 110. According to one embodiment, the rear cover 190 may be fastened to the side surface of the housing 110 with the rear surface of the housing 110 covered.

Referring to FIG. 3, the components of the electronic device 100 may be seated in the housing 110 in a stacked state. For example, a fingerprint sensor 150 and a filter 151 may be sequentially seated on the upper surface of the bracket 160, which is seated inside the housing 110, and the display 130 may be seated on the upper layer of the filter 151 have. The cover glass 120 may be fastened to the housing 110 in a form of covering the display 130. The printed circuit board 170 and the battery 181 may be positioned on the lower layer of the bracket 160 and the rear cover 190 may be mounted on the printed circuit board 170 and the battery 181 And can be fastened to the housing 110 in a covered form.

According to one embodiment, a bonding sheet may be disposed between the cover glass 120 and the display 130. The adhesive sheet may adhere the display 130 to the cover glass 120, for example.

According to one embodiment, a back panel may be disposed between the display 130 and the bracket 160. The back panel may include at least one of, for example, an emboss sheet and a heat-radiating sheet. The heat-radiating sheet may be formed of a thermally conductive material (e.g., copper, graphite, or the like). The heat-radiating sheet may prevent heat from the display 130 from being transmitted to other internal components of the electronic device 100. According to an exemplary embodiment of the present invention, an opening may be formed in the back panel, and the opening may be formed in a part of the opaque back panel so that light can be incident on the fingerprint sensor 150 disposed on the lower layer of the display 130 .

4 is a view for explaining the influence of external light in capturing a fingerprint according to an embodiment.

4, components included in light emitted from a light emitting unit (e.g., a backlight unit (BLU), a light emitting diode (LED), an organic light emitting diode (OLED) : The red component 131a, the green component 133a, and the blue component 135a) are reflected by the finger 430 and the reflected components (e.g., the red component 131b, the green component 133b, (For example, green component 133b or blue component 135b) is incident on the fingerprint sensor 150. In this case, the red component 131b is blocked by the filter 151, , A fingerprint image can be obtained.

However, in the presence of strong external light 410 (e.g., sunlight) as in an outdoor environment, the fingerprint sensor 150 may be included in the light-receiving portion of the fingerprint sensor 150 due to the influence of the external light 410 A saturation phenomenon occurs in the pixels, so that a clear fingerprint image may not be obtained. For example, some of the light components (e.g., infrared component (not shown), red component 411, green component 413, and blue component 415 of visible light) included in the external light 410 Scattering may occur in the area of the finger 430 while the finger or the red component 411 is transmitted through the finger 430. As a result, the fingerprint area included in the fingerprint image is captured in a bright state, . In order to prevent this, a filter 151 for blocking a light component (for example, an infrared component or a red component 411) of a designated wavelength band is disposed on the upper layer of the fingerprint sensor 150, but a strong external light 410 It may not be completely blocked. Even in the indoor environment, even when the external light 410 includes a light component having a specified wavelength band (e.g., an infrared component or a red component 411), the fingerprint image included in the fingerprint image due to the light component is bright It may be difficult to acquire a clear fingerprint image.

Accordingly, in the present invention, the stronger external light 410 exists (for example, the external illuminance is greater than or equal to the designated size) as in an outdoor environment, or the external light 410 has a light component of a specified wavelength band The electronic device 100 may include a light source (e.g., a light source included in the display 130), a light source (e.g., an infrared component or a red component 411) The second fingerprint image can be obtained while the first fingerprint image is acquired while the light emitting unit is turned off. Thereafter, the electronic device 100 can acquire a clear third fingerprint image used for fingerprint recognition based on the first fingerprint image and the second fingerprint image. For example, the second fingerprint image captured in a state in which the light emitting unit is turned off is a fingerprint image influenced only by the external light 410, and the first fingerprint image captured when the light emitting unit is turned on includes external light 410, Since the fingerprint image is affected by the light emitted through the light emitting unit, the electronic device 100 differentiates the first fingerprint image from the second fingerprint image, so that the electronic device 100 is affected by only the light emitted through the light emitting unit, A third fingerprint image can be acquired.

5 is a block diagram of an electronic device according to one embodiment.

5, the electronic device 100 may include a display 130, an illumination sensor 140, a fingerprint sensor 150, a processor 183, and a memory 185. However, the configuration of the electronic device 100 is not limited thereto. According to various embodiments, electronic device 100 may omit at least one of the components described above, and may further include at least one other component. The components of the electronic device 100 shown in FIG. 5 only show the components involved in acquiring the fingerprint image among the components described in FIGS. 1-3. Accordingly, in the following description, the description that is the same as that of FIG. 1 to FIG. 3 can be omitted.

According to one embodiment, the processor 183 may obtain the measured external illuminance through the illuminance sensor 140. According to one embodiment, the processor 183 may set the sensing time (or exposure time) of the fingerprint sensor 150 based on the external illuminance. For example, the processor 183 sets the sensing time of the fingerprint sensor 150 to be shorter as the external illuminance increases, and the sensing time of the fingerprint sensor 150 to be longer as the external illuminance decreases. For example, when the external illuminance is a first value (e.g., about 500 lux), the processor 183 may set the sensing time of the fingerprint sensor 150 to a first time (e.g., 50 ms) The sensing time of the fingerprint sensor 150 may be set to a second time (e.g., 30 ms) shorter than the first time when the second value is greater than the first value (e.g., about 3000 lux). According to one embodiment, when the external illuminance is greater than the previously measured external illuminance, the processor 183 may calculate the sensing time of the fingerprint sensor 150 based on the sensed external illuminance, The sensing time of the fingerprint sensor 150 may be longer than the sensing time of the predetermined fingerprint sensor 150 when the external illuminance is smaller than the previously measured external illuminance.

According to one embodiment, the processor 183 can set the sensing time of the fingerprint sensor 150 so that saturation does not occur in the pixels included in the light receiving portion of the fingerprint sensor 150. For example, the processor 183 may set the sensing time of the fingerprint sensor 150 to be shorter than the time (saturation time) at which the pixel is saturated. The saturation time may include, for example, from a point at which light is incident on the pixel to a point at which the pixel receives light up to a maximum capacity for receiving light. In some instances, the processor 183 may set the sensing time of the fingerprint sensor 150 to a time that is shortly before the pixel saturates, i. E., A shorter time than the saturation time. According to the embodiment described above, the processor 183 can solve the problem that the sharpness of the fingerprint image is hindered due to saturation of the pixels included in the light receiving unit of the fingerprint sensor 150. [

According to one embodiment, the processor 183 may obtain a fingerprint image captured by the user through the fingerprint sensor 150. [ According to one embodiment, the processor 183 may be configured to turn on a light emitting portion (e.g., a light source included in the display 130) when the external illuminance is greater than a predetermined magnitude (e.g., about 10000 lux) And a second fingerprint image captured in a state in which the light emitting unit is turned off can be obtained. In this case, the processor 183 may acquire a third fingerprint image used for fingerprint recognition based on the first fingerprint image and the second fingerprint image. For example, the processor 183 may obtain the third fingerprint image by subtracting the second fingerprint image from the first fingerprint image. According to the above-described embodiment, the processor 183 acquires a fingerprint image from which the influence of the light components included in the external light is removed, and performs the fingerprint authentication using the obtained fingerprint image, thereby improving the accuracy of the fingerprint authentication .

According to one embodiment, the processor 183 may determine the characteristics of external light if the external illumination is less than a specified magnitude (e.g., about 10000 lux) (e.g., indoor environment). For example, the processor 183 can calculate the ratio of the light components (e.g., red component, green component, and blue component) included in the external light through the illuminance sensor 140, The characteristics of external light can be judged.

According to one embodiment, the processor 183 may convert a light component (e.g., an infrared component or a red component) of a wavelength band of which the external light is less than a specified magnitude (e.g., about 10000 lux) (For example, when the incandescent lamp or the red lamp is an external light source), a first fingerprint image captured while the light emitting unit is turned on and a second fingerprint image captured while the light emitting unit is turned off are obtained can do. Also in this case, the processor 183 can acquire a third fingerprint image used for fingerprint recognition based on the first fingerprint image and the second fingerprint image. For example, the processor 183 can obtain the third fingerprint image by subtracting the second fingerprint image from the first fingerprint image. According to the above-described embodiment, the processor 183 acquires a clear fingerprint image from which the influence of a light component in a designated wavelength band is removed, and performs fingerprint authentication using the obtained fingerprint image, thereby improving the accuracy of the fingerprint authentication .

According to one embodiment, the processor 183 may convert a light component (e.g., an infrared component or a red component) of a wavelength band of which the external light is less than a specified magnitude (e.g., about 10000 lux) ) (E.g., when the LED lamp or the fluorescent lamp is an external light source), the fingerprint image captured while the light emitting unit is turned on can be used for fingerprint recognition.

According to one embodiment, the processor 183 may analyze the fingerprint image acquired through the fingerprint sensor 150 to collect fingerprint information. For example, the processor 183 determines the type of bending of the fingerprint in the fingerprint image, and determines the length, direction or specific point of the ridges included in the fingerprint (e.g., the point where the ridges are split, It is possible to collect fingerprint information.

According to one embodiment, the processor 183 may store in the memory 185 at least one of the fingerprint information or the fingerprint information collected as a result of the analysis of the fingerprint image.

According to one embodiment, the processor 183 compares the fingerprint information collected as a result of the analysis of the fingerprint image or the fingerprint image acquired through the fingerprint sensor 150 with the information related to the fingerprint stored in the memory 185, To determine whether or not the user is authenticated.

According to one embodiment, the memory 185 may store fingerprint images or fingerprint information. According to one embodiment, the memory 185 may store sensing time (or exposure time) information of the fingerprint sensor 150 according to the external illuminance. As an example, the memory 185 may store a second sensing time corresponding to a first sensing time (e.g., about 50 ms) corresponding to a first external illuminance (e.g., about 500 lux) or a second sensing time corresponding to a second external illuminance : 30 ms), and the like.

According to one embodiment, the light emitting unit is not limited to the light source included in the display 130. According to various embodiments, the light emitting unit may be included in the fingerprint sensor 150. For example, the light emitting unit may be a light emitting diode (LED) included in the fingerprint sensor 150.

As described above, according to various embodiments, an electronic device (e.g., electronic device 100) may include an illuminance sensor (e.g., illuminance sensor 140), a light emitting portion, a biosensor (e.g., fingerprint sensor 150) And a processor (e.g., processor 183). The processor may be configured to sense illumination outside the electronic device through the illumination sensor. The processor may be configured to acquire, via the biosensor, a first image of an object outside the electronic device in a state of outputting light from the light emitting unit, when the external illuminance falls within a first specified range. Wherein the processor acquires a second image for the object through the biosensor in a state in which the light emitting unit does not output light when the external illuminance falls within a second designated range, To obtain a third image for the object. The processor may be configured to process the third image using the second image. In addition, the processor may be configured to perform authentication on the object using the first image or the processed third image according to the external illuminance.

According to various embodiments, the light emitting portion may be a light source included in a display (e.g., display 130).

According to various embodiments, the electronic device may further include a memory for storing information on the sensing time of the biosensor according to the external illuminance, and the processor may be configured to determine, based on the information stored in the memory, The sensing time can be set.

According to various embodiments, the processor sets the sensing time of the biosensor to be shorter than the predetermined sensing time of the biosensor based on the measured external illuminance when the external illuminance is greater than the previously measured external illuminance, Wherein the sensing time of the biosensor is set to be longer than the sensing time of the biosensor when the external illuminance is smaller than the previously measured external illuminance and the sensing time of the biosensor is set to a saturation time Can be set shorter.

According to various embodiments, the processor determines the characteristics of the external light when the external illuminance falls within the first specified range, and based on the result of the determination of the characteristics of the external light, Acquires a fourth image for the object through the biosensor in a state of outputting light by the light emitting unit and outputs the fourth image for the object in a state where the light is not output by the light emitting unit Acquire a fifth image through the biosensor, and acquire a sixth image used for fingerprint recognition based on the fourth image and the fifth image.

According to various embodiments, when the light component of the designated wavelength band included in the external light is less than the designated size, the processor outputs the light through the biosensor in a state of outputting light from the light emitting unit, 7 < / RTI > images.

According to various embodiments, the processor may be configured to calculate a ratio of light components included in the external light through the illuminance sensor, and to calculate a ratio of the external light to the external light based on the ratio, And may be configured to determine whether a light component of a specified wavelength band is included in the specified size or more.

As described above, according to various embodiments, an electronic device (e.g., electronic device 100) includes a light emitting portion, a biometric sensor (e.g., fingerprint sensor 150), and a processor (e.g., processor 183) can do. The processor may be configured to sense illumination outside the electronic device via the biosensor. The processor may be configured to acquire, via the biosensor, a first image of an object outside the electronic device in a state of outputting light from the light emitting unit, when the external illuminance falls within a first specified range. Wherein the processor acquires a second image for the object through the biosensor in a state in which the light emitting unit does not output light when the external illuminance falls within a second designated range, To obtain a third image for the object. The processor may be configured to process the third image using the second image. The processor may be configured to perform authentication on the object using the first image or the processed third image according to the external illumination.

According to various embodiments, the light emitting portion may be a light source included in the display.

According to various embodiments, the electronic device further includes a memory for storing information regarding a sensing time of the biosensor according to the external illuminance, and the processor is configured to determine, based on the information stored in the memory, Can be set to set the time.

According to various embodiments, the processor sets the sensing time of the biosensor to be shorter than the predetermined sensing time of the biosensor based on the measured external illuminance when the external illuminance is greater than the previously measured external illuminance, Wherein the sensing time of the biosensor is set to be longer than the sensing time of the biosensor if the external illuminance is smaller than the measured external illuminance, May be set to be shorter than the saturation time.

According to various embodiments, the processor determines the characteristics of the external light when the external illuminance falls within the first specified range, and based on the result of the determination of the characteristics of the external light, Acquires a fourth image with respect to the object through the biosensor in a state of outputting light by the light emitting unit, and outputs the fourth image to the object without outputting light by the light emitting unit Acquiring a fifth image for the biometric sensor based on the fourth image and the fifth image, and acquiring a sixth image used for fingerprint recognition based on the fourth image and the fifth image.

According to various embodiments, when the light component of the designated wavelength band included in the external light is less than the designated size, the processor outputs the light through the biosensor in a state of outputting light from the light emitting unit, 7 < / RTI > images.

According to various embodiments, the biosensor may be arranged to overlap the display area of the display when viewed from the front of the display of the electronic device.

As described above, according to various embodiments, an electronic device (e.g., electronic device 100) may include an illuminance sensor (e.g., an ambient light sensor 140) capable of measuring external illuminance, And a processor (e.g., processor 183) electrically connected to the illumination sensor and the fingerprint sensor. The fingerprint sensor 150 may include a fingerprint sensor (e.g., a fingerprint sensor 150) Wherein the processor obtains the external illuminance measured through the illuminance sensor, sets a sensing time of the fingerprint sensor based on the external illuminance, and if the external illuminance is equal to or greater than the designated magnitude, acquires a first fingerprint image captured through the fingerprint sensor and a second fingerprint image captured through the fingerprint sensor while the light emitting unit is turned off while the first fingerprint image is on, The first may be set based on the second fingerprint image to obtain a third fingerprint images to be used for fingerprint recognition.

According to various embodiments, the processor may be configured to acquire the third fingerprint image by subtracting the second fingerprint image from the first fingerprint image as at least a part of the operation of acquiring the third fingerprint image.

According to various embodiments, the electronic device further includes a memory (e.g., memory 185) that stores information about the sensing time of the fingerprint sensor according to the external illuminance, The sensing time of the fingerprint sensor may be set based on the information stored in the memory.

According to various embodiments, the processor may be configured to, when at least a part of the operation of setting the sensing time of the fingerprint sensor, set the sensing time of the fingerprint sensor to a predetermined external illuminance when the external illuminance is greater than the previously measured external illuminance Setting the sensing time of the fingerprint sensor to be longer than the sensing time of the predetermined fingerprint sensor when the external illuminance is smaller than the previously measured external illuminance, The sensing time of the fingerprint sensor may be set shorter than the saturation time of the pixel included in the light receiving unit.

According to various embodiments, the processor may determine the characteristics of the external light if the external illuminance is less than the specified size, and determine that the external light is a light component of a specified wavelength band based on a result of determining the characteristics of the external light, Acquires a fourth fingerprint image captured through the fingerprint sensor and a fifth fingerprint image captured through the fingerprint sensor while the light emitting unit is turned off while the light emitting unit is turned on, And a sixth fingerprint image used for fingerprint recognition based on the fingerprint image and the fifth fingerprint image.

According to various embodiments, if the light component of the designated wavelength band included in the external light is less than the designated size, the processor may be configured to perform a process of capturing the fingerprint image by capturing the fingerprint sensor in a state in which the light- 7 fingerprint image.

As described above, according to various embodiments, an electronic device (e.g., electronic device 100) may include an illuminance sensor (e.g., an ambient light sensor 140) capable of measuring external illuminance, a light source capable of emitting light A fingerprint sensor (e.g., a fingerprint sensor 150) that receives the light reflected from the user's fingerprint, and a controller (not shown) that electrically communicates with the light sensor, the display, and the fingerprint sensor (E.g., a processor 183), the processor acquires the external illuminance measured through the illuminance sensor, sets the sensing time of the fingerprint sensor based on the external illuminance, and the external illuminance The first fingerprint image captured through the fingerprint sensor and the second fingerprint image captured through the fingerprint sensor in a state where the light source is turned off are displayed in a state in which the light source is turned on, And it may be set to the first fingerprint image and a fingerprint image to obtain a third for use in fingerprint identification based on the second fingerprint image.

According to various embodiments, the processor may be configured to acquire the third fingerprint image by subtracting the second fingerprint image from the first fingerprint image as at least a part of the operation of acquiring the third fingerprint image.

According to various embodiments, the electronic device further includes a memory (e.g., memory 185) that stores information about the sensing time of the fingerprint sensor according to the external illuminance, The sensing time of the fingerprint sensor may be set based on the information stored in the memory.

According to various embodiments, the processor may be configured to, when at least a part of the operation of setting the sensing time of the fingerprint sensor, set the sensing time of the fingerprint sensor to a predetermined external illuminance when the external illuminance is greater than the previously measured external illuminance Setting the sensing time of the fingerprint sensor to be longer than the sensing time of the predetermined fingerprint sensor when the external illuminance is smaller than the previously measured external illuminance, The sensing time of the fingerprint sensor may be set shorter than the saturation time of the pixel included in the light receiving unit of the fingerprint sensor.

According to various embodiments, the processor may determine the characteristics of the external light if the external illuminance is less than the specified size, and determine that the external light is a light component of a specified wavelength band based on a result of determining the characteristics of the external light, Acquires a fourth fingerprint image captured through the fingerprint sensor and a fifth fingerprint image captured through the fingerprint sensor while the light source is turned off while the light source is turned on, And a sixth fingerprint image used for fingerprint recognition based on the fingerprint image and the fifth fingerprint image.

According to various embodiments, when the light component of the designated wavelength band included in the external light is less than the specified size, the processor may be configured to perform a process of capturing the fingerprint image by capturing the fingerprint sensor with the light source turned on, 7 fingerprint image.

According to various embodiments, the processor may be configured to calculate a ratio of light components included in the external light through the illuminance sensor, and to calculate a ratio of the external light to the external light based on the ratio, And may be configured to determine whether a light component of a specified wavelength band is included in the specified size or more.

According to various embodiments, the fingerprint sensor may be arranged to overlap the display area of the display when viewed from the front of the display.

6 is a diagram illustrating a method of operating an electronic device associated with fingerprint image acquisition according to an exemplary embodiment.

Referring to FIG. 6, the ambient light sensor 140 of the electronic device 100 may measure the external illuminance, at operation 610. The illuminance sensor 140 may also transmit the measured external illuminance to the processor 183 of the electronic device 100. In some embodiments, the external illuminance may be measured through the light receiving portion of the fingerprint sensor 150. [ In this case, the measured external illuminance value may be transmitted to the processor 183.

At operation 620, the processor 183 may set the sensing time (or exposure time) of the fingerprint sensor 150 based on the measured external illuminance. According to one embodiment, the processor 183 sets the sensing time of the fingerprint sensor 150 to be shorter as the external illuminance increases, and the sensing time of the fingerprint sensor 150 to be longer as the external illuminance decreases. For example, the processor 183 may set the sensing time of the fingerprint sensor 150 to a first time (e.g., 50 ms) when the external illuminance is a first value (e.g., about 500 lux) The sensing time of the fingerprint sensor 150 may be set to a second time (e.g., 30 ms) shorter than the first time when the second value is greater than the first value (e.g., about 3000 lux).

At operation 630, the processor 183 may determine whether the external illumination is greater than or equal to a specified magnitude. In one embodiment, the processor 183 may determine the outdoor environment if the exterior illuminance is greater than or equal to a predetermined size (e.g., about 10000 lux), and may determine the indoor environment when the exterior illuminance is less than the designated size .

If the external illuminance is greater than or equal to the designated size, the processor 183 determines the first fingerprint image through the fingerprint sensor 150 with the light emitting unit (e.g., the light source included in the display 130) You can capture. For example, the processor 183 can turn on the light emitting unit, and when the light emitted from the light emitting unit is reflected by the user's fingerprint and then incident on the light receiving unit (e.g., image sensor) of the fingerprint sensor 150, A fingerprint image can be obtained through the fingerprint image. At this time, the fingerprint sensor 150 can receive the light for a predetermined sensing time (or exposure time).

In operation 650, the processor 183 may capture the second fingerprint image through the fingerprint sensor 150 while the light emitting unit is turned off. According to one embodiment, electronic device 100 may first perform act 650 before performing act 640. [

In operation 660, the processor 183 may acquire a third fingerprint image used for fingerprint recognition based on the first fingerprint image and the second fingerprint image. For example, the processor 183 may obtain the third fingerprint image by subtracting the second fingerprint image from the first fingerprint image. The first fingerprint image captured in a state in which the light emitting unit is turned off is a fingerprint image influenced only by external light, and the first fingerprint image captured in a state in which the light emitting unit is turned on affects external light and light emitted through the light emitting unit The processor 183 can obtain a clear third fingerprint image influenced only by the light emitted through the light emitting unit by subtracting the first fingerprint image from the second fingerprint image . According to an embodiment of the present invention, the operation of subtracting the first fingerprint image from the second fingerprint image may be performed such that each pixel of the light receiving unit corresponding to the second fingerprint image corresponds to the first fingerprint image at a value set through light reception And each pixel of the light receiving unit may include an operation of subtracting a value set through light reception. Here, the value at which the pixel of the light-receiving unit is set through light reception may include, for example, a value obtained by digitizing the amount of energy (or the amount of charge) changed through light reception.

If the external illuminance is less than the specified size, the processor 183 determines at operation 670 that the electronic device is in an environment (e.g., indoor environment, cloudy weather, etc.) can do. A process of acquiring a fingerprint image in an environment in which the brightness of external light is not large (e.g., an indoor environment) will be described in detail with reference to FIG.

FIG. 7 is a diagram illustrating a method of operating an electronic device associated with fingerprint image acquisition in a low-illuminance environment (e.g., indoor environment) according to an exemplary embodiment.

7, when the external illuminance measured through the illuminance sensor 140 is less than a predetermined magnitude (for example, about 10000 lux), that is, when it is determined that a low-illuminance environment (e.g., indoor environment) , At operation 710, the processor 183 of the electronic device 100 may determine the characteristics of the external light. According to one embodiment, the processor 183 may calculate the proportion of light components (e.g., red component, green component, and blue component) contained in the external light through the illumination sensor 140, The characteristics of the external light can be determined. According to one embodiment, the processor 183 can confirm the illuminance through the fingerprint sensor 150 in addition to the illuminance sensor 140. For example, the illuminance can be confirmed through the light receiving unit of the fingerprint sensor 150.

In operation 720, the processor 183 may determine whether a light component (e.g., an infrared component or a red component) in a wavelength band designated by the external light is included in a predetermined size (or ratio). According to one embodiment, the processor 183 may estimate the ratio of the infrared component included in the external light through the ratio of the red component, the green component, and the blue component included in the external light.

(E.g., an incandescent or red light source is an external light source) at a specified size (or ratio) in a wavelength band designated by the external light (e.g., an infrared component or a red component) The control unit 183 can capture the first fingerprint image through the fingerprint sensor 150 while the light emitting unit (e.g., the light source included in the display 130) is turned on. For example, the processor 183 can turn on the light emitting unit, and when the light emitted from the light emitting unit is reflected by the user's fingerprint and then incident on the light receiving unit (e.g., image sensor) of the fingerprint sensor 150, A fingerprint image can be obtained through the fingerprint image. At this time, the fingerprint sensor 150 can receive the light for a predetermined sensing time (or exposure time).

In operation 740, the processor 183 may capture the second fingerprint image through the fingerprint sensor 150 while the light emitting unit is turned off. According to one embodiment, electronic device 100 may first perform operation 740 prior to performing operation 730. [

In operation 750, the processor 183 may acquire a third fingerprint image used for fingerprint recognition based on the first fingerprint image and the second fingerprint image. For example, the processor 183 may obtain the third fingerprint image by subtracting the second fingerprint image from the first fingerprint image. The first fingerprint image captured in a state in which the light emitting unit is turned off is a fingerprint image influenced only by external light, and the first fingerprint image captured in a state in which the light emitting unit is turned on affects external light and light emitted through the light emitting unit The processor 183 can obtain a clear third fingerprint image influenced only by the light emitted through the light emitting unit by subtracting the first fingerprint image from the second fingerprint image .

In operation 760, if the external light includes a light component (e.g., an infrared component or a red component) in a wavelength band designated below the designated size (or ratio) (e.g., the LED light or fluorescent light is an external light source) The controller 183 can acquire a fingerprint image through the fingerprint sensor 150 while the light emitting unit is turned on, and the fingerprint image can be used for fingerprint recognition. Also in this case, the fingerprint sensor 150 can receive the light for a predetermined sensing time (or exposure time).

As described above, according to various embodiments, a fingerprint image acquisition method of an electronic device (e.g., electronic device 100) may include acquiring an external illuminance measured through an illuminance sensor (e.g., illuminance sensor 140) A step of setting the sensing time of the fingerprint sensor (e.g., the fingerprint sensor 150) based on the external illuminance; and a step of setting the sensing time of the fingerprint sensor (e.g., fingerprint sensor 150) The method comprising: obtaining a first fingerprint image and a second fingerprint image captured through the fingerprint sensor in a state in which the light emitting unit is turned off; and using the first fingerprint image and the second fingerprint image for fingerprint recognition And acquiring a third fingerprint image.

According to various embodiments, the operation of acquiring the third fingerprint image may include acquiring the third fingerprint image by subtracting the second fingerprint image from the first fingerprint image.

According to various embodiments, the act of setting the sensing time of the fingerprint sensor may be based on sensing information of the fingerprint sensor based on the external illuminance stored in a memory (e.g., memory 185) And setting the time.

According to various embodiments, the operation of setting the sensing time of the fingerprint sensor may include sensing the sensing time of the fingerprint sensor when the external illuminance is greater than the previously measured external illuminance, And setting the sensing time of the fingerprint sensor to be longer than the predetermined sensing time of the fingerprint sensor when the external illuminance is smaller than the previously measured external illuminance, The sensing time may be set shorter than the saturation time of the pixel included in the light receiving unit of the fingerprint sensor.

According to various embodiments, the fingerprint image acquisition method may further include: an operation of determining the characteristics of external light when the external illuminance is less than the specified size; The fourth fingerprint image captured through the fingerprint sensor and the fifth fingerprint image captured through the fingerprint sensor in a state where the light emitting unit is turned off are acquired in a state in which the light emitting unit is turned on And a sixth fingerprint image used for fingerprint recognition based on the fourth fingerprint image and the fifth fingerprint image.

According to various embodiments, if the light component of the designated wavelength band included in the external light is less than the designated size, the fingerprint image acquisition method may further include: And acquiring a seventh fingerprint image to be used.

8 is a view for explaining a method of acquiring a fingerprint image by minimizing the influence of external light according to an embodiment.

Referring to FIG. 8, the electronic device 100 may be configured such that strong external light (e.g., solar light) exists (for example, in a state where the external illuminance is greater than or equal to a designated size) as in an outdoor environment, (For example, when the incandescent lamp or the red lamp is an external light source) in the first state 801 (for example, the infrared light component or the red color component) The first fingerprint image 831 is acquired while the light emitting unit 810 is turned off as in the second state 803 while the second fingerprint image 831 is lighted 833).

8, the first fingerprint image 831 captured in the state where the light emitting unit 810 is turned on (e.g., the first state 801) is influenced by the external light and the light emitted through the light emitting unit And the second fingerprint image 833 captured in the state where the light emitting unit 810 is turned off (e.g., the second state 803) may be a fingerprint image affected only by external light.

Accordingly, the processor 183 of the electronic device 100 can distinguish the second fingerprint image 833 from the first fingerprint image 831 by subtracting the second fingerprint image 833 from the second fingerprint image 833, which is affected only by the light emitted through the light emitting unit 810, It is possible to obtain a clear third fingerprint image 835 in which the influence of light is minimized.

According to one embodiment, at least one of the first fingerprint image 831 and the second fingerprint image 833 may have a captured area in a state where pixels are saturated. For example, when the finger is captured without covering some of the pixels of the light receiving unit of the fingerprint sensor 150, the strong external light is directly incident on the certain pixels, so that the fingerprint image can be captured in a state in which some of the pixels are saturated. 8 shows a state in which the first fingerprint image 831 and the second fingerprint image 833 are captured in a state in which left and right upper pixels of the light receiving unit of the fingerprint sensor 150 are saturated. In this case, the processor 183 may exclude a region (for example, left and right upper regions) saturated in the first fingerprint image 831 and the second fingerprint image 833 from an area used for fingerprint recognition.

9 is a block diagram of an electronic device 901 in a network environment 900, in accordance with various embodiments. 9, an electronic device 901 (e.g., electronic device 100) in a network environment 900 may communicate with an electronic device 902 via a first network 998 (e.g., a short range wireless communication) Or may communicate with electronic device 904 or server 908 via a second network 999 (e.g., a remote wireless communication). According to one embodiment, the electronic device 901 may communicate with the electronic device 904 through the server 908. According to one embodiment, electronic device 901 includes a processor 920 (e.g., processor 183), a memory 930 (e.g., memory 185), an input device 950, an audio output device 955, A display device 960 (e.g., a display 130), an audio module 970, a sensor module 976 (e.g., a light sensor 140 or a fingerprint sensor 150), an interface 977, a haptic module 979, a camera module 980, a power management module 988, a battery 989 (e.g., a battery 181), a communication module 990, a subscriber identity module 996, and an antenna module 997 . In some embodiments, at least one of these components (e.g., display 960 or camera module 980) may be omitted from electronic device 901 or other components may be added. In some embodiments, some components may be integrated, such as, for example, in the case of a sensor module 976 (e.g., a fingerprint sensor, iris sensor, or ambient light sensor) embedded in a display device 960 .

Processor 920 drives at least one other component (e.g., hardware or software component) of electronic device 901 that is coupled to processor 920 by driving software, e.g., program 940, And can perform various data processing and arithmetic operations. Processor 920 loads and processes commands or data received from other components (e.g., sensor module 976 or communication module 990) into volatile memory 932 and stores the resulting data in nonvolatile memory 934, Lt; / RTI > According to one embodiment, the processor 920 is operated independently of the main processor 921 (e.g., a central processing unit or application processor), and additionally or alternatively, uses a lower power than the main processor 921, A special processor 923 (e.g., a graphics processing unit, an image signal processor, a sensor hub processor, or a communications processor). Here, the auxiliary processor 923 may be operated separately from or embedded in the main processor 921.

 In this case, the coprocessor 923 may be configured to operate on behalf of the main processor 921, for example, while the main processor 921 is in an inactive (e.g., sleep) At least one component (e.g., display 960, sensor module 976, or communication module 990) of the components of electronic device 901, along with main processor 921, , ≪ / RTI > According to one embodiment, the coprocessor 923 (e.g., an image signal processor or communications processor) is implemented as a component of some other functionally related component (e.g., camera module 980 or communication module 990) .

The memory 930 may store various data used by at least one component (e.g., processor 920 or sensor module 976) of the electronic device 901, e.g., software (e.g., program 940) ), And input data or output data for the associated command. The memory 930 may include volatile memory 932 or non-volatile memory 934. [

The program 940 is software stored in the memory 930 and may include, for example, an operating system 942, middleware 944 or application 946. [

The input device 950 is an apparatus for receiving instructions or data to be used in a component (e.g., processor 920) of the electronic device 901 from the outside (e.g., a user) of the electronic device 901, For example, a microphone, a mouse, or a keyboard may be included.

The sound output device 955 is a device for outputting a sound signal to the outside of the electronic device 901. For example, the sound output device 955 may include a speaker for general use such as a multimedia reproduction or a sound reproduction, . According to one embodiment, the receiver may be formed integrally or separately with the speaker.

Display device 960 may be an apparatus for visually presenting information to a user of electronic device 901 and may include, for example, a display, a hologram device, or a projector and control circuitry for controlling the device. According to one embodiment, the display device 960 may include a touch sensor or a pressure sensor capable of measuring the intensity of the pressure on the touch.

The audio module 970 can bidirectionally convert sound and electrical signals. According to one embodiment, the audio module 970 may acquire sound through an input device 950, or may be coupled to an external output device 955 or an external electronic device (e.g., an electronic device) that is wired or wirelessly connected to the electronic device 901 Device 902 (e.g., a speaker or headphone)).

The sensor module 976 may generate an electrical signal or data value corresponding to an internal operating state (e.g., power or temperature) of the electronic device 901 or an external environmental condition. The sensor module 976 may be, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared sensor, And a light intensity sensor.

Interface 977 may support a designated protocol that may be wired or wirelessly connected to an external electronic device (e.g., electronic device 902). According to one embodiment, the interface 977 may include a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 978 may be a connector that can physically connect the electronic device 901 and an external electronic device For example, a headphone connector).

The haptic module 979 can convert an electrical signal into a mechanical stimulus (e.g., vibration or motion) or an electrical stimulus that the user can perceive through a tactile or kinesthetic sense. The haptic module 979 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 980 can capture a still image and a moving image. According to one embodiment, the camera module 980 may include one or more lenses, an image sensor, an image signal processor, or a flash.

The power management module 988 is a module for managing the power supplied to the electronic device 901, and may be configured as at least a part of, for example, a power management integrated circuit (PMIC).

The battery 989 is an apparatus for supplying power to at least one component of the electronic device 901 and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

The communication module 990 is responsible for establishing a wired or wireless communication channel between the electronic device 901 and an external electronic device (e.g., electronic device 902, electronic device 904 or server 908) And can support communication performance. Communications module 990 may include one or more communications processors that support wired or wireless communications, which operate independently from processor 920 (e.g., an application processor). According to one embodiment, communication module 990 includes a wireless communication module 992 (e.g., a cellular communication module, a short range wireless communication module or a global navigation satellite system (GNSS) communication module) or a wired communication module 994 (E.g., a local area network (LAN) communication module or a power line communication module), and may communicate with a first network 998 (e.g., a Bluetooth, WiFi direct or IrDA ) Or a second network 999 (e.g., a telecommunications network such as a cellular network, the Internet, or a computer network (e.g., a LAN or WAN)). The various types of communication modules 990 described above may be implemented as a single chip or may be implemented as separate chips.

According to one embodiment, the wireless communication module 992 may use the user information stored in the subscriber identity module 996 to identify and authenticate the electronic device 901 within the communication network.

The antenna module 997 may include one or more antennas for transmitting or receiving signals or power externally. According to one embodiment, the communication module 990 (e.g., the wireless communication module 992) may transmit or receive signals to or from an external electronic device via an antenna suitable for the communication scheme.

Some of the components are connected to each other via a communication method (e.g., a bus, a general purpose input / output (GPIO), a serial peripheral interface (SPI) or a mobile industry processor interface (MIPI) For example, commands or data).

 According to one embodiment, the command or data may be transmitted or received between the electronic device 901 and an external electronic device 904 via a server 908 connected to the second network 999. Each of the electronic devices 902, 904 may be the same or a different kind of device as the electronic device 901. According to one embodiment, all or a portion of the operations performed on the electronic device 901 may be performed on another or a plurality of external electronic devices. According to one embodiment, in the event that the electronic device 901 has to perform certain functions or services automatically or upon request, the electronic device 901 may be capable of executing the function or service itself, And may request the external electronic device to perform at least some functions associated therewith. The external electronic device receiving the request may execute the requested function or additional function and transmit the result to the electronic device 901. The electronic device 901 may process the received result as is or additionally to provide the requested function or service. For this purpose, for example, cloud computing, distributed computing or client-server computing technology may be used.

An electronic device according to various embodiments disclosed herein can be various types of devices. The electronic device may include, for example, at least one of a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

It should be understood that the various embodiments of the present document and the terminology used are not intended to limit thetechniques described in this document to specific embodiments, but rather to include various modifications, equivalents, and / or alternatives of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar components. The singular expressions may include plural expressions unless the context clearly dictates otherwise. In this document, the expressions "A or B," "at least one of A and / or B," "A, B or C," or "at least one of A, B, and / Possible combinations. Expressions such as "first", "second", "first" or "second" may be used to qualify the components, regardless of order or importance, and to distinguish one component from another And does not limit the constituent elements. When it is mentioned that some (e.g., first) component is "(functionally or communicatively) connected" or "connected" to another (second) component, May be connected directly to the component, or may be connected through another component (e.g., a third component).

As used in this document, the term " module " includes units comprising hardware, software or firmware and may be used interchangeably with terms such as, for example, logic, logic blocks, components or circuits. A module may be an integrally constructed component or a minimum unit or part thereof that performs one or more functions. For example, the module may be configured as an application-specific integrated circuit (ASIC).

Various embodiments of the present document may include instructions stored on a machine-readable storage medium (e.g., internal memory 936 or external memory 938) readable by a machine (e.g., a computer) Software (e.g., program 940). The device may include an electronic device (e.g., electronic device 901) in accordance with the disclosed embodiments as an apparatus that is operable to invoke stored instructions from the storage medium and act upon the called instructions. When the instruction is executed by a processor (e.g., processor 920), the processor may perform functions corresponding to the instruction, either directly or using other components under the control of the processor. The instructions may include code generated or executed by the compiler or interpreter. A device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' means that the storage medium does not include a signal and is tangible, but does not distinguish whether data is stored semi-permanently or temporarily on the storage medium.

According to one embodiment, a method according to various embodiments disclosed herein may be provided in a computer program product. A computer program product can be traded between a seller and a buyer as a product. A computer program product may be distributed in the form of a machine-readable storage medium (eg, compact disc read only memory (CD-ROM)) or online via an application store (eg PlayStore ^™ ). In the case of on-line distribution, at least a part of the computer program product may be stored temporarily or at least temporarily in a storage medium such as a manufacturer's server, a server of an application store, or a memory of a relay server.

Each of the components (e.g., modules or programs) according to various embodiments may be comprised of a single entity or a plurality of entities, and some of the subcomponents described above may be omitted or other subcomponents may be implemented in various implementations More examples can be included. Alternatively or additionally, some components (e.g., modules or programs) may be integrated into a single entity to perform the same or similar functions performed by each respective component prior to integration. Operations performed by a module, program, or other component, in accordance with various embodiments, may be performed sequentially, in a parallel, repetitive, or heuristic manner, or at least some operations may be performed in a different order, have.

Claims (15)

1. In an electronic device,

   Illuminance sensor;

   A light emitting portion;

   Biological sensor; And

   And a processor operatively connected to the illumination sensor, the light emitting unit, and the biosensor,

   An illuminance sensor for detecting an illuminance outside the electronic device through the illuminance sensor,

   Acquiring a first image for an object outside the electronic device through the biosensor in a state of outputting light from the light emitting unit when the external illuminance falls within a first specified range,

   Acquiring a second image for the object through the biosensor in a state in which the light emitting unit does not output light when the external illuminance falls within a second specified range, Acquiring a third image for the object, and processing the third image using the second image, and

   And authenticate the object using the first image or the processed third image according to the external illuminance.
2. The method according to claim 1,

   Wherein the light emitting portion is a light source included in the display.
3. The method according to claim 1,

   Further comprising a memory for storing information on sensing time of the biosensor according to the external illuminance,

   The processor comprising:

   And setting the sensing time of the biosensor based on the information stored in the memory.
4. The method according to claim 1,

   The processor comprising:

   Wherein the sensing time of the biosensor is set to be shorter than the sensing time of the biosensor based on the measured external illuminance when the external illuminance is greater than the previously measured external illuminance, The sensing time of the biosensor is set longer than the sensing time of the biosensor,

   Wherein the sensing time of the biosensor is set shorter than the saturation time of the pixel included in the light receiving unit.
5. The method according to claim 1,

   The processor comprising:

   Determining a characteristic of external light when the external illuminance belongs to the first specified range,

   A fourth image for the object in a state of outputting light by the light emitting unit, when it is determined that the external light includes a light component of a designated wavelength band at a predetermined size or more, based on a result of the determination of the characteristics of the external light, Acquiring a fifth image for the object through the biosensor in a state in which the light is not output from the light emitting unit,

   And obtain a sixth image used for fingerprint recognition based on the fourth image and the fifth image.
6. The method of claim 5,

   The processor comprising:

   And to acquire a seventh image used for fingerprint recognition through the biosensor in a state of outputting light from the light emitting unit when the light component of the designated wavelength band included in the external light is less than the designated size.
7. The method of claim 5,

   The processor comprising:

   As part of the operation of determining the characteristics of the external light,

   Calculating a ratio of light components included in the external light through the illuminance sensor,

   And determine whether or not the light component of the specified wavelength band is included in the external light at the specified size or larger based on the ratio.
8. In an electronic device,

   A light emitting portion;

   Biological sensor; And

   The processor comprising:

   Detecting the illuminance outside the electronic device through the biosensor,

   Acquiring a first image for an object outside the electronic device through the biosensor in a state of outputting light from the light emitting unit when the external illuminance falls within a first specified range,

   Acquiring a second image for the object through the biosensor in a state in which the light emitting unit does not output light when the external illuminance falls within a second specified range, Acquiring a third image for the object, and processing the third image using the second image, and

   And authenticate the object using the first image or the processed third image according to the external illuminance.
9. The method of claim 8,

   Wherein the light emitting portion is a light source included in the display.
10. The method of claim 8,

    Further comprising a memory for storing information on sensing time of the biosensor according to the external illuminance,

    The processor comprising:

    And setting the sensing time of the biosensor based on the information stored in the memory.
11. The method of claim 8,

    The processor comprising:

    Wherein the sensing time of the biosensor is set to be shorter than the sensing time of the biosensor based on the measured external illuminance when the external illuminance is greater than the previously measured external illuminance, The sensing time of the biosensor is set longer than the sensing time of the biosensor,

    Wherein the sensing time of the biosensor is set shorter than the saturation time of the pixel included in the light receiving portion of the biosensor.
12. The method of claim 8,

    The processor comprising:

    Determining a characteristic of external light when the external illuminance belongs to the first specified range,

    A fourth image for the object in a state of outputting light by the light emitting unit, when it is determined that the external light includes a light component of a designated wavelength band at a predetermined size or more, based on a result of the determination of the characteristics of the external light, Acquiring a fifth image for the object through the biosensor in a state in which light is not output from the light emitting unit,

    And obtain a sixth image used for fingerprint recognition based on the fourth image and the fifth image.
13. The method of claim 12,

    The processor comprising:

    And to acquire a seventh image used for fingerprint recognition through the biosensor in a state of outputting light from the light emitting unit when the light component of the designated wavelength band included in the external light is less than the designated size.
14. The method of claim 8,

    The biosensor includes:

    Wherein the electronic device is arranged to overlap the display area of the display when viewed from the front of the display of the electronic device.
15. A method of acquiring a fingerprint image of an electronic device,

    Obtaining an external illuminance measured by the illuminance sensor;

    Setting a sensing time of the fingerprint sensor based on the external illuminance;

    A first fingerprint image captured through the fingerprint sensor while the light emitting unit is turned on and a second fingerprint image captured through the fingerprint sensor while the light emitting unit is turned off, Obtaining an image; And

    And acquiring a third fingerprint image used for fingerprint recognition based on the first fingerprint image and the second fingerprint image.

Images