TMD27713驱动光线传感器的驱动基于MSP430单片机，I2C光接近传感器，LTR-501ALS-01二合一距离传感器配一颗LTE-C216R-14光宝红外发射管。好处是把发射LED的公差减至最低，同时有高感度侦测环境光功能。其主要功能在于根据环境光调节背光亮度。

-The APDS-9900/9901 provides digital ambient light

sensing (ALS), IR LED and a complete proximity detection

system in a single 8 pin package. The proximity function

offers plug and play detection to 100 mm (without front

glass) thus eliminating the need for factory calibration

of the end equipment or sub-assembly. The proximity

detection feature operates well　bright sunlight

to dark rooms. The wide dynamic range also allows for

operation in short distance detection behind dark glass

such as a cell phone. In addition, an internal state machine

provides the ability to put the device into a low power

mode in between ALS and proximity measurements

providing very low average power consumption. The ALS

provides a photopic response to light intensity in very low

light condition or behind a dark faceplate.