Intersil introduces highly accurate, low power RGB digital light sensor

Intersil Corporation has unveiled the ISL29125 digital light sensor, which, according to the company, is the industry”s most accurate, lowest power and smallest Red, Green and Blue (RGB) sensor to optimise the display resolution and colour quality of mobile devices and TVs in all lighting environments. The ISL29125 RGB sensor communicates directly with a device”s core processor to enable the automatic adjustment of display brightness based on changing light conditions, providing consumers with a crisper and more colour consistent experience while extending battery life.

The compact ISL29125 is the industry”s smallest 6-lead RGB sensor, which minimises the real estate requirements of the optical sensor aperture.

Moving from one environment to another, lighting conditions can affecting the clarity and brightness of device displays. With integrated, robust on-chip IR filtering technology and an angular response of a minimum of +/- 35% field of view at 50% light intensity, the ISL29125 RGB sensor looks to eliminate these display fluctuations, whether the user is in an incandescent lit classroom, an LED lit store or outdoors in the sun. The ISL29125 works directly with the device”s core processor to continuously adjust the lux range and ensure that the display maintains consistent perceived colour and the ideal brightness level based on the current lighting environment.

The ISL29125 works similarly when integrated into a TV display, effectively adjusting the brightness and colour consistency of the display as the lighting conditions in a room changes. Specifically, in organic light-emitting diode (OLED) display TV applications, the ISL29125 can be used to adjust the blue organic material ageing profile to maintain consistent contrast and brightness throughout the life of the display.

“Consumers demand a seamless user experience with their handheld devices, whether they are at home, at the office or somewhere in between,” said Sandeep Aji, marketing and applications director, Optical Products, Intersil. “This new digital light sensor solution incorporates industry-leading digital light sensor technology that enables mobile device users to maintain optimal display conditions, especially when moving from one lighting environment to another. The solution provides an excellent example of how Intersil is leveraging our advanced technology to simplify and optimise the consumer user experience, without sacrificing the battery life of mainstream devices.”

The ISL29125 comes with a standard I2C interface and an operating voltage range of 2.25V to 3.63V, it also offers a wide dynamic range of 5.7m lux to 10k lux detection capabilities, which allows the display brightness to adjust in low- to high-lit environments, preventing unnecessary power consumption to prolong battery life. The RGB sensor”s lux range select feature enables designers to program the lux range for optimised counts/lux based on the device”s requirements. In power down mode, the RGB sensor consumes less than 0.5uA of current and on active mode it runs at approximately 85uA.

The ISL29125 RGB sensor can also effectively filter out the coloru of the device when measuring the light color temperature, enabling manufacturers to offer a variety of device color options.


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