Optical property storage device and system using same

A device, comprising:

• a light transistor in which a conductance between a source electrode and a drain electrode changes in accordance with optical properties of color temperature and illumination of incident light;
• and
• a memristor device of two terminals which is respectively provided with a first electrode that is electrically connected to any one electrode of the source and drain electrodes of the light transistor, a resistance change layer that is provided on the first electrode and in which a resistance change occurs in accordance with an applied voltage between the two electrodes, and a second electrode that is provided on the resistance change layer and to which the voltage of a depression pulse is applied after the voltage of a potentiation pulse is applied;
• wherein a voltage that turns on the light transistor is applied to a gate electrode of the light transistor to perform a first sampling process in which the influence of incident light is reflected, and
• wherein during the first sampling process, a voltage of a potentiation pulse is applied to a second electrode of the variable resistance memory device;
• wherein after the first sampling process, a voltage that turns off the light transistor is applied to a gate electrode of the light transistor, and a second sampling process is performed in which the influence of incident light is reduced or blocked, and
• wherein during the second sampling process, the voltage of a depression pulse is applied to the second electrode of the variable resistance memory device.

A system, comprising:

• a device for changing conductance in accordance with the optical properties of color temperature and illuminance of incident light and storing a changed conductance;
• a machine learning model which is pre-trained to output result information related to the optical properties of incident light, circadian illuminance or circadian rhythm from input information about variable conductance reflecting the optical properties of the incident light;
• and
• a controller for controlling to input the input information about variable conductance stored in the device into the machine learning model and output the result information;
• a light transistor in which a conductance between a source electrode and a drain electrode changes in accordance with optical properties of color temperature and illumination of incident light;
• and
• a memristor device of two terminals which is respectively provided with a first electrode that is electrically connected to any one electrode of the source and drain electrodes of the light transistor, a resistance change layer that is provided on the first electrode and in which a resistance change occurs in accordance with the applied voltage between the two electrodes, and a second electrode that is provided on the resistance change layer and to which a voltage of a depression pulse is applied after the voltage of a potentiation pulse is applied;
• wherein an on voltage that turns on the light transistor is applied to a gate electrode of the light transistor to perform a first sampling process in which the influence of incident light is reflected, and
• wherein during the first sampling process, a voltage of a potentiation pulse is applied to a second electrode of the variable resistance memory device;
• wherein after the first sampling process, an off voltage that turns off the light transistor is applied to a gate electrode of the light transistor, and a second sampling process is performed in which the influence of incident light is reduced or blocked, and
• wherein during the second sampling process, a voltage of a depression pulse is applied to the second electrode of the variable resistance memory device.