| 摘要 |
<p>PROBLEM TO BE SOLVED: To adjust the brightness of a display screen of a terminal device in accordance with actual ambient illuminance without adjusting the brightness of the display screen on the basis of only measurement illuminance by an illuminance sensor, and to prevent the brightness of the display screen from being changed many times in a short time because a threshold is reciprocated many times due to fluctuation of illuminance by setting illuminance of the illuminance sensor, and an illuminance threshold for changing the brightness of the display screen of the terminal device based on the illuminance.SOLUTION: Difference between measurement illuminance and an illuminance reference value is operated, difference between a measurement inclination angle and an inclination angle reference value is operated, whether the operated difference of the measurement inclination angle satisfies a predetermined condition to change the brightness of a display part is determined, whether the operated difference of the measurement illuminance satisfies the predetermined condition to change the brightness of the display part is determined, and the brightness of the display part is changed on the basis of determination results.</p> |
