Light sensor

The light sensor can be used to detect a variety of physical quantities, such as sound field, electric field, pressure, vibration, temperature, acceleration, etc., and can also complete detection tasks that are difficult to complete in existing detection tasks. In a small space, in a strong electromagnetic interference and high-voltage environment, fiber optic sensors have shown superior capabilities.

1. What is the meaning of light sensor

The light sensor is also called the brightness sensor, the English name is Light-Sensor, and many tablets and mobile phones are equipped with this sensor. Generally located on the top of the handheld device screen, it can automatically adjust the brightness of the handheld device screen according to the brightness of the light where the handheld device is located, and bring the best visual effect to the user.

2. The working principle of the light sensor

The light sensor is composed of two components, namely a light projector and a light receiver. The light is focused by the lens by the light projector, and then transmitted to the lens of the light receiver, and then to the receiving sensor. The receiving sensor will receive the light signal Converted into an electrical signal, this telecommunication signal can be further used for various switching and control actions. The basic principle is to use the signal obtained by the action of shielding the light between the projector and the receiver to complete various automatic controls.

3. The role of light sensor

The light sensor is located at a small spot next to the front camera. If there is sufficient light (outdoor or indoor with sufficient lighting), the keyboard light will automatically go out after about 2-3 seconds. Even if you operate the machine again, the keyboard light will It won’t light up, unless it’s in a dark place, another keyboard light will automatically light up; if there is enough light, try to cover the light sensor by hand, after 2-3 seconds, the keyboard light will automatically When it lights up, this is the function of the light sensor, which is a power-saving function.