Ambient light sensors are not a specific brand but a category of electronic components used to measure surrounding light levels. They are produced by various global companies, such as ams-OSRAM (Austria/Germany), Broadcom (USA), and Texas Instruments (USA). These sensors are widely used in industries like consumer electronics (e.g., smartphones, tablets), automotive (automatic headlight control), and industrial automation (display brightness adjustment). Key products include analog/digital light-to-voltage converters (e.g., TSL2581 by AMS, OPT3001 by TI) and integrated ambient-light-sensing ICs with I2C interfaces.