Abstract: A light emitting device including first and second power sources, which is capable of emitting light without being affected by a charging recycle period. The light emitting device includes an LED as a light emitting section for emitting light, and illuminates an object by light emission from the LED. The light emitting device further includes a first power source and a second power source that is charged by the first power source. Light emission from the LED is controlled using one of the first power source and the second power source as an input power supply according to light emitting current for causing the LED to emit light.

Abstract: A power supply device includes a first load circuit that operates by a first voltage; a second load circuit that operates by a second voltage higher than the first voltage; a boosting circuit that generates the first voltage if the power supply device is in a first driving mode, and generates the second voltage if the power supply device is in a second driving mode; a first feedback circuit that connects the first load circuit and the boosting circuit if the power supply device is in the first driving mode; and a second feedback circuit that connects the first load circuit and the boosting circuit if the power supply device is in the second driving mode. The first load circuit is operated in the first driving mode. The first load circuit and the second load circuit are operated in the second driving mode.

Abstract: A light emitting device including first and second power sources, which is capable of emitting light without being affected by a charging recycle period. The light emitting device includes an LED as a light emitting section for emitting light, and illuminates an object by light emission from the LED. The light emitting device further includes a first power source and a second power source that is charged by the first power source. Light emission from the LED is controlled using one of the first power source and the second power source as an input power supply according to light emitting current for causing the LED to emit light.

Abstract: A power supply device includes a first load circuit that operates by a first voltage; a second load circuit that operates by a second voltage higher than the first voltage; a boosting circuit that generates the first voltage if the power supply device is in a first driving mode, and generates the second voltage if the power supply device is in a second driving mode; a first feedback circuit that connects the first load circuit and the boosting circuit if the power supply device is in the first driving mode; and a second feedback circuit that connects the first load circuit and the boosting circuit if the power supply device is in the second driving mode. The first load circuit is operated in the first driving mode. The first load circuit and the second load circuit are operated in the second driving mode.

Abstract: An image capturing apparatus includes an acceleration sensor having a first measurement axis and a second measurement axis that intersect each other, and arranged on a plane that intersects the imaging optical axis of the image capturing apparatus while inclining the first and second measurement axes by about 45° in the vertical direction, and a calculation unit that calculates the arc tangent of the ratio of the detection result of an acceleration due to gravity by the first measurement axis and the detection result of an acceleration due to gravity by the second measurement axis, thereby obtaining the inclination degree of the image capturing apparatus in the rolling direction.

Abstract: An image capturing apparatus includes an acceleration sensor having a first measurement axis and a second measurement axis that intersect each other, and arranged on a plane that intersects the imaging optical axis of the image capturing apparatus while inclining the first and second measurement axes by about 45° in the vertical direction, and a calculation unit that calculates the arc tangent of the ratio of the detection result of an acceleration due to gravity by the first measurement axis and the detection result of an acceleration due to gravity by the second measurement axis, thereby obtaining the inclination degree of the image capturing apparatus in the rolling direction.

Abstract: An image capturing apparatus includes an acceleration sensor having a first measurement axis and a second measurement axis that intersect each other, and arranged on a plane that intersects the imaging optical axis of the image capturing apparatus while inclining the first and second measurement axes by about 45° in the vertical direction, and a calculation unit that calculates the arc tangent of the ratio of the detection result of an acceleration due to gravity by the first measurement axis and the detection result of an acceleration due to gravity by the second measurement axis, thereby obtaining the inclination degree of the image capturing apparatus in the rolling direction.

Abstract: An electronic apparatus which detects a remaining level of a battery used as a power supply, comprising a current detection unit configured to detect a current value flowing through a circuit of the electronic apparatus, a voltage detection unit configured to detect a voltage value of the battery, and a calculation unit configured to calculate a voltage value of the battery when a consumption current of the electronic apparatus is a predetermined consumption current, based on current values and voltage values detected by the current detection unit and the voltage detection unit, respectively, in a plurality of states different in the consumption current of the electronic apparatus.

Abstract: An image capturing apparatus includes an acceleration sensor having a first measurement axis and a second measurement axis that intersect each other, and arranged on a plane that intersects the imaging optical axis of the image capturing apparatus while inclining the first and second measurement axes by about 45° in the vertical direction, and a calculation unit that calculates the arc tangent of the ratio of the detection result of an acceleration due to gravity by the first measurement axis and the detection result of an acceleration due to gravity by the second measurement axis, thereby obtaining the inclination degree of the image capturing apparatus in the rolling direction.

Abstract: The present invention provides an electronic apparatus which detects a remaining level of a battery used as a power supply, comprising a current detection unit configured to detect a current value flowing through a circuit of the electronic apparatus, a voltage detection unit configured to detect a voltage value of the battery, and a calculation unit configured to calculate a voltage value of the battery when a consumption current of the electronic apparatus is a predetermined consumption current, based on current values and voltage values detected by the current detection unit and the voltage detection unit, respectively, in a plurality of states different in the consumption current of the electronic apparatus.

Abstract: A light measuring device includes an integration-type light measuring sensor having a plurality of pixels and arranged to logarithmically compress a signal of light received by each pixel and to output the signal as a light measurement value for each pixel, a memory arranged to store an average of gain correction values for all pixels of the light measuring sensor, a deviation from the average of gain correction values obtained for each pixel of the light measuring sensor, a level correction value for each pixel of the light measuring sensor obtained for a reference integration period, and an average of level shift amounts of all pixels of the light measuring sensor caused by a change of integration period, and a computing circuit arranged to compute, from the level correction value for each pixel and the average of level shift amounts of all pixels stored in the memory, a level correction value for each pixel of the light measuring sensor for an integration period other than the reference integration period.