Introduction
In portable electronic products, reducing the power
consumption to provide the user with increased battery
life is one of today’s critical design considerations. The
liquid crystal display (LCD) and its associated backlighting are among the more (and frequently the most)
power hungry loads in portable products. As a result,
the use of an ambient light sensor (ALS) to optimize the
operation of the backlight LEDs under a variety of environmental lighting situations is increasing while, at the
same time, the preferred technology choices available
to designers for sensing have shifted towards more integrated solutions