ROHM Semiconductor Ambient Light Sensor ICs
ROHM Semiconductor Ambient Light Sensor (ALS) ICs are designed to control the brightness of LED-backlight LCD displays. This brightness is based on ambient light availability, brightness for optimum display visibility, and energy efficiency. Operation in a temperature range of -40°C to 85°C ensures stable operation under extreme conditions. These ICs are an ideal choice for LCD-equipped portable devices as well as LCD monitors and High-Definition (HDIV) backlight control. The ambient light sensor ICs closely matches the human eye for accurate light measurement and provide uniform visibility for LCDs over a wide range.
These ambient light sensor ICs are available in analog and digital configurations. The analog ALS ICs have an output current proportional to light (current sourcing) with a measurement range of 0 to 100,000+ lux. Whereas digital ALS ICs output a 16-bit (0 to ~65,535 lx) digital signal over a direct I2C bus interface to the MCU. The analog and digital ALS ICs are offered in compact surface-mount packages, choices include the ultra-small WSOF5 or WSOF6. Typical applications include mobile phones, digital cameras, notebook PCs, and LCD TVs.
Features
- Improved visibility with lower power consumption
- Stable operation regardless of light source
- Superior light sensing accuracy
- Compact surface-mount packages
- Built-in shutdown function
Applications
- Mobile phones
- Digital cameras
- Video players
- PDAs
- Notebook PCs
- Car navigation systems
- LCD TVs
- LCD monitors /displays
Additional Resources
Featured Products
ROHM Semiconductor BH1730FVC Ambient Light Sensor
Suitable to obtain the ambient light data for adjusting LCD backlight power of a TV or mobile phone.
Development Tools
ROHM Semiconductor Sensor Shield Evaluation Kits
Evaluation platforms with various ROHM sensors that use standard Arduino shield interface pins.
Analog Output Application Circuit Diagram
Digital Output Application Circuit Diagram
