Method of controlling exposure time by using infrared light, computer-readable storage medium having recorded thereon computer program codes for performing the method, and electronic apparatus having photographing function

A method of controlling an exposure time by using infrared light, the method comprising:

• emitting light including a visible light wavelength range and an infrared wavelength range from a flash;
• absorbing light in the infrared wavelength range and generating a detection signal corresponding to the light in the infrared wavelength range;
• and
• controlling an exposure time in which an image sensor is exposed to an incident light in the visible light wavelength range based on the detection signal,
• wherein, if an increment in the detection signal, compared to a case in which the emission of the flash is not performed, reaches a threshold value, the exposure of the image sensor is stopped.

A non-transitory computer-readable recording medium having recorded thereon computer program codes for performing a method of controlling an exposure time by using infrared light when the computer program codes are read and executed by a processor, the method of controlling an exposure time by using infrared light comprising:

• emitting light including a visible light wavelength range and an infrared wavelength range from a flash;
• absorbing light in the infrared wavelength range and generating a detection signal corresponding to the light in the infrared wavelength range;
• and
• controlling an exposure time in which an image sensor is exposed to an incident light in the visible light wavelength range based on the detection signal,
• wherein, when an increment in the detection signal, compared to a case in which the emission of the flash is not performed, reaches a threshold value, the emission of the flash is stopped.