With the improvement of people’s living standards, more and more families are beginning to install smart lighting systems during decoration to provide higher-level and comfortable services. Smart home lighting systems can improve the quality of residential lighting environments and are fully people-oriented. Fully taking into account the visual effects of people, and also taking into account the “seasonal affective disorder” caused by the reduction of seasonal light, to create a personalized, artistic, comfortable and elegant living environment, but the lighting system has always been a Important energy consumption objects currently suffer from serious waste, so the development of intelligent lighting is of great significance.

Four control technologies for smart lighting:

Remote control lighting: Lighting equipment is controlled through radio signals. You can use a mobile phone client to remotely control the switch, and some are equipped with switch sockets and transmitters when you purchase them.

Infrared sensing: By capturing infrared rays of specific wavelengths to control the lights on and off, delayed lighting can achieve the effect of “lights on when people come and lights off when people leave”.

Combined lighting: Nowadays, combined lighting composed of multiple light sources has developed very maturely, and both scenes and color brightness can be freely combined.

Touch lighting: Capacitance changes are caused by finger touch to control lamps. The insulation and waterproof features are suitable for bathrooms, kitchens and other spaces.

Six major functions of smart lighting:

1. The timing control function allows you to freely adjust the time of the light switch, as you choose and use it, and it will serve you all the time.

2. Centralized control and multi-point operation function: A terminal in any place can control lights in different places; or terminals in different places can control the same light.

3. Full on, full off and memory functions. The lights of the entire lighting system can be fully turned on and off with one click. There is no need to press buttons one by one to turn off or on the lights, reducing unnecessary trouble.

4. Scene settings set a fixed mode, and can be controlled with one click after programming once. Or choose free settings, give it more functions according to your personal needs, and control your home with your own ideas.

5. Soft start function: When the light is turned on, the light gradually changes from dark to bright. When the light is turned off, the light gradually changes from bright to dark. This prevents sudden changes in brightness from irritating the human eye, providing a buffer for the human eye and protecting the eyes. It also avoids the impact of sudden changes in high current and high temperature on the filament, protects the bulb, and extends the service life. It can also slowly brighten the light when people approach it, and slowly dim as the person leaves, effectively saving electricity.

6. Lighting brightness adjustment function No matter what scene you are doing, you can adjust the scene mode and lighting brightness you want according to your own hospital. Different light brightness can be adjusted for receiving guests, parties, movies, and studying. Less and darker light helps you think, while more and brighter light makes the atmosphere more enthusiastic. These operations are very convenient. You can press and hold the local switch to brighten and dim the light, or you can use the centralized controller or remote control to adjust the brightness of the light with just one press of a button.

Ambient light sensors are mainly composed of photosensitive elements. Photosensitive components are developing rapidly, with various varieties and wide applications. The ambient light sensor can sense the surrounding light conditions and tell the processing chip to automatically adjust the display backlight brightness to reduce the product’s power consumption. For example, in mobile applications such as mobile phones, notebooks, and tablets, the display consumes up to 30% of the total battery power. The use of ambient light sensors can maximize the battery’s working time. On the other hand, the ambient light sensor helps the display deliver a soft picture. When the ambient brightness is high, the LCD display using the ambient light sensor will automatically adjust to high brightness. When the external environment is dark, the display will be adjusted to low brightness. The ambient light sensor requires an infrared cutoff film on the chip, or even a patterned infrared cutoff film directly plated on the silicon wafer.

The WH4530A launched by Taiwan Wanghong is a light distance proximity sensor that combines an ambient light sensor (ALS), a proximity sensor (PS) and a high-efficiency infrared LED light into one; the range can be measured from 0-100cm; Using I2C interface, it can achieve functions such as ultra-high sensitivity, precise ranging and wide detection range.

This chip solves the shortcomings of traditional infrared, ultrasonic and radio frequency proximity sensors such as low sensitivity, slow response speed, low reliability, and high power consumption. It adopts high-quality optical design, making the proximity sensor small in size, high in measurement frequency, and reliable. High, provides a spectrum close to human eye response, can work in darkness to direct sunlight; can detect reflected infrared light, with high accuracy and excellent immunity.

The proximity sensor (PS) has a built-in 940nm filter for ambient light immunity. Therefore, the PS can detect reflected infrared light with high precision and excellent immunity; it can also be set to a fine level, and its dark current is small. , low illumination response and high sensitivity; as the illumination increases, the current changes linearly; meeting the needs of various application scenarios.

characteristic:

l2C interface (400kHz/s fast mode)

Supply voltage range 2.4V ~ 3.6V

Ambient light sensor:

-The spectrum is close to the response of the human eye

-Anti-fluorescent light flicker

-Selectable gain and resolution (up to 16 bits)

-High sensitivity and wide detection range

-High accuracy of illumination and light ratio

Proximity sensor:

-Recommended operating distance <100cm

-Selectable gain and resolution (up to 12 bits)

-Programmable PWM and LED current

-Intelligent cross talk calibration

-Speed ​​mode to improve response time.

WH4530A proximity sensing chip is used in more and more consumer products due to its performance advantages of non-contact, high sensitivity and high accuracy; products are widely used in smart door locks, mobile devices, consumer electronics, smart homes, and anti-myopia prevention. Equipment and so on.