The enhanced sensitivity of ams TSL25911 digital light sensors ensures meaningful readings down to very low light levels, which gives designers greater flexibility when choosing the optimum sensor location for controlling display brightness.
Light sensors of lower sensitivity than the TSL25911 impose severe constraints on the optical properties of the panel they are placed behind, typically darkened glass or another attenuating material. Designers must pay careful attention to factors such as the physical placement of the sensor, and the minimum intensity of light that must be received in order to deliver sufficiently accurate measurements.
This can be of particular concern for smartphone and tablet displays, since small changes in product styling can result in costly design alterations to accommodate less sensitive devices. If the front panel is inked glass, an unsightly void or aperture may be needed at the location of the sensor.
With the introduction of the TSL25911, designers now have far greater flexibility in system design and layout. Offering outstanding low-light sensitivity down to 0.000377 lux and wide dynamic range of 600M:1 up to 88,000 lux (bright sunlight), these sensors can deliver accurate and meaningful measurements even when exposed to extremely low light levels. This gives designers freedom to place the sensor away from the direct path of the light it is measuring and behind a wider variety of darkened glass or attenuating materials, or to avoid the need for an aperture in inked glass.
- Digital signage
- White goods
- Medical and industrial instrumentation
- Keyboard-illumination control
- Solid-state and general lighting controls
- Printer paper detection
- Operable in light levels from darkened room to bright sunlight
- Patented high-accuracy dual-photodiode architecture
- Photopic response close to human eye
- Programmable interrupt function
- Area-efficient 2mm x 2.4mm Optical