光感測

The JSA-1137 device, an ambient light sensor (ALS), features high sensitivity, wide dynamic range and fast communication speed through I2C interface. The JSA-1137 has 8 sensitivity ranges for adapting to different applications and various opto-mechanisms. The ALS reading (output count) is proportional to the illuminance regardless of the light sources; furthermore, no extra data manipulation is required. It also has a built-in circuit to reject the 50Hz/60Hz flicker noise caused by indoor light sources. The most distinguished feature of the ALS is that the spectral response is almost the same as human eye's photopic vision due to a well-engineered optical coating on the top of the ambient light detector; thus, light source related correction coefficient is not necessary.