TMD2620 proximity sensor and TMD2725 ambient light proximity sensor module,
Reduced the gap between the LED emitter and sensor to 1.0mm and eliminated the effect of optical crosstalk.

ams (Korea Branch Representative Lee Jong-deok) announced that it has launched new proximity and proximity/ambient light sensing modules that allow Android smartphone manufacturers to reduce the sensor aperture in the display cover glass to a minimum size.

By using the TMD2620 proximity sensor or the TMD2725, which integrates both a proximity sensor and an ambient light sensor, phone manufacturers can reduce aperture size by as much as 50%, thereby enhancing the aesthetics of devices, particularly those featuring white or light-colored bezels. The TMD2620 and TMD2725 achieve small aperture sizes of 1.4 and 2.0 mm, respectively.

The TMD2620 and TMD2725 provide groundbreaking optical module packaging technology that allows the emitter (IR LED) and photodiode to be positioned at a distance of only 1.0 mm. Along with an optical barrier between the emitter and the photodiode, lenses located above the emitter and the sensor reduce crosstalk caused by reflection from the cover glass surface.

The offset adjustment register eliminates the effects of residual crosstalk during the module's proximity sensing. The automatic ambient light rejection function further enhances the accuracy of the device's proximity measurement. The ability to measure up to a range of 100mm can be compared to laser-based solutions.

“Until now, the inability to overcome optical crosstalk effects acted as a technical limitation preventing Android phone manufacturers from reducing proximity sensing apertures to less than 3.0 mm,” said Herbert Truppe, Senior Marketing Manager at ams. “Now, with the TMD2620 and TMD2725, we have been able to solve these technical problems and implement smaller apertures than before.”

TMD2620 and TMD2725 are currently in mass production. Based on a quantity of 1,000 units, the unit order price is $0.36 for TMD2620 and $0.43 for TMD2725.