According to various embodiments, an electronic device includes a housing, a display viewable through a front surface of the housing and configured to display a screen, a camera sensor disposed in at least a portion of the front surface of the housing and configured to measure an external illuminance, a processor operationally connected to the display and the camera sensor; and a memory operationally connected to the processor. The memory may store instructions that, when executed, cause the processor to control the electronic device to: detect an turn-on event of the display, turn on the camera sensor to acquire the external illuminance using the camera sensor based on the display being turned on, acquire preview image information for a specified time through the camera sensor, turn off the camera sensor, acquire the external illuminance using an exposure time and a brightness value based on the acquired preview image information, and control a luminance of the display based on the external illuminance.

According to various embodiments, an electronic device includes a housing, a display viewable through a front surface of the housing and configured to display a screen, a camera sensor disposed in at least a portion of the front surface of the housing and configured to measure an external illuminance, a processor operationally connected to the display and the camera sensor; and a memory operationally connected to the processor. The memory may store instructions that, when executed, cause the processor to control the electronic device to: detect an turn-on event of the display, turn on the camera sensor to acquire the external illuminance using the camera sensor based on the display being turned on, acquire preview image information for a specified time through the camera sensor, turn off the camera sensor, acquire the external illuminance using an exposure time and a brightness value based on the acquired preview image information, and control a luminance of the display based on the external illuminance.

An electronic device for controlling a brightness of a light source and an operating method of the electronic device are provided. According to the electronic device and the operating method, an image including an ambient environment of a light source is captured, information of an exposure of the captured image is obtained, information about a brightness of the ambient environment of the light source is determined based on the information about the exposure, and a brightness of the light source is controlled based on the determined information about the brightness of the ambient environment.

According to various embodiments, an electronic device includes a housing, a display viewable through a front surface of the housing and configured to display a screen, a camera sensor disposed in at least a portion of the front surface of the housing and configured to measure an external illuminance, a processor operationally connected to the display and the camera sensor; and a memory operationally connected to the processor. The memory may store instructions that, when executed, cause the processor to control the electronic device to: detect an turn-on event of the display, turn on the camera sensor to acquire the external illuminance using the camera sensor based on the display being turned on, acquire preview image information for a specified time through the camera sensor, turn off the camera sensor, acquire the external illuminance using an exposure time and a brightness value based on the acquired preview image information, and control a luminance of the display based on the external illuminance.

The invention provides a light indicator (100) for use in evaluating a quantity of melanopsin active radiation, the light indicator (100) comprising a light indicator element (110) comprising a sensing area (111), wherein the light indicator element (110) comprises a light reflecting element (120) configured to reflect at least part of light illuminating the sensing area (111) having one or more wavelengths selected from the wavelength range of an absorption band of melanopsin in the visible wavelength range and configured to absorb at least part of light illuminating the sensing area (111) having one or more wavelengths in the visible wavelength range outside the wavelength range of the absorption band of melanopsin in the visible wavelength range; and a non-sensing area (130) configured adjacent to the sensing area (111), wherein the non-sensing area (130) has an achromatic color having a lightness in the range corresponding to the lightness of shades of gray.

The invention provides a light indicator (100) for use in evaluating a quantity of melanopsin active radiation, the light indicator (100) comprising a light indicator element (110) comprising a sensing area (111), wherein the light indicator element (110) comprises a light reflecting element (120) configured to reflect at least part of light illuminating the sensing area (111) having one or more wavelengths selected from the wavelength range of an absorption band of melanopsin in the visible wavelength range and configured to absorb at least part of light illuminating the sensing area (111) having one or more wavelengths in the visible wavelength range outside the wavelength range of the absorption band of melanopsin in the visible wavelength range; and a non-sensing area (130) configured adjacent to the sensing area (111), wherein the non-sensing area (130) has an achromatic color having a lightness in the range corresponding to the lightness of shades of gray.

According to various embodiments, an electronic device includes a housing, a display viewable through a front surface of the housing and configured to display a screen, a camera sensor disposed in at least a portion of the front surface of the housing and configured to measure an external illuminance, a processor operationally connected to the display and the camera sensor; and a memory operationally connected to the processor. The memory may store instructions that, when executed, cause the processor to control the electronic device to: detect an turn-on event of the display, turn on the camera sensor to acquire the external illuminance using the camera sensor based on the display being turned on, acquire preview image information for a specified time through the camera sensor, turn off the camera sensor, acquire the external illuminance using an exposure time and a brightness value based on the acquired preview image information, and control a luminance of the display based on the external illuminance.

An electronic device for controlling a brightness of a light source and an operating method of the electronic device are provided. According to the electronic device and the operating method, an image including an ambient environment of a light source is captured, information of an exposure of the captured image is obtained, information about a brightness of the ambient environment of the light source is determined based on the information about the exposure, and a brightness of the light source is controlled based on the determined information about the brightness of the ambient environment.

An infrared imaging device includes an imaging element including a plurality of infrared detection pixels which are two-dimensionally arranged, a diaphragm, and a FPN calculation unit which acquires a first captured image data obtained by capturing an image using the imaging element in a state in which an F-number of the diaphragm is set to a first value and a second captured image data obtained by capturing an image using the imaging element in a state in which the F-number is set to a second value while a motion picture is being captured, and calculates fixed pattern noise included in captured image data obtained by capturing an image using the imaging element based on the acquired first captured image data, the acquired second captured image data, the first value, and the second value.

An infrared imaging device includes an imaging element including a plurality of infrared detection pixels which are two-dimensionally arranged, a diaphragm, and a FPN calculation unit which acquires a first captured image data obtained by capturing an image using the imaging element in a state in which an F-number of the diaphragm is set to a first value and a second captured image data obtained by capturing an image using the imaging element in a state in which the F-number is set to a second value while a motion picture is being captured, and calculates fixed pattern noise included in captured image data obtained by capturing an image using the imaging element based on the acquired first captured image data, the acquired second captured image data, the first value, and the second value.