A cadmium sulfide nanocrystal, wherein the cadmium sulfide nanocrystal shows maximum luminescence peaks at two or more wavelengths and most of the atoms constituting the nanocrystal are present at the surface of the nanocrystal to form defects. Streets are formed between adjacent waveguides by etching the IC material to a substrate. The volume of the cushion is reduced by providing the recesses, and the behavior of the airbag device in an inflated and deployed state is stabilized by the projecting portion. In some embodiments, if the device was originally powered off or in a standby mode, after a predetermined period of time, the device will be powered off or returned to the standby mode, and the battery charging indicator will no longer be displayed. When a performance monitor 9-0 detects signal degradation, signal interruption, and the like, the system controller 1-0 sends an instruction signal and the control circuits 20-0 and 21-0 output control signals for controlling coupling ratios of the variable optical couplers 3-0 and 6-0, respectively. Accordingly, the image sensor is compatible with a universal image signal processor, which receives and processes RGB Bayer signals, without an additional compatible device or module.