Use Case


Touchless control with Gesture Sensor Interface ICs


High recognition rate - even through distraction by ambient light, temperature, aging

Expertise in Optical Sensor Interface ICs


  • DC current cancellation
  • High light suppression via HALIOS® technology
  • Lowest system latency
  • Ultra low power consumption in auto-mode
  • Best detection distance to size ratio


  • Automotive qualified (AEC-Q100) with proven track record over vehicle lifetime
  • Highest robustness in automotive environment over vehicle lifetime
  • Best-in-class ambient light immunity due to HALIOS® technology
  • Long time stability due to compensation of LED or PD ageing
  • Adjustable to high optical basic coupling


  • Adaptable sensor system detection range
  • Self-calibration makes the sensor solution scalable for different integration situations (e.g. different covers)
  • Sensitivity adjustment via configuration

Our Solution

About – E909.23 Gesture Sensor Interface IC

The infrared-based HALIOS® gesture IC provides the highest sensitivity and robustness in detecting fast swipe movements for enhanced non-contact control. The solution is immune against ambient light enabling robust sensor design.

Advantages / USPs

  • Lowest sensor system cost
  • Best in class sunlight rejection
  • Sensor interface with lowest latency
  • Scalability of the detection area via multiple use (up to seven modules)
  • Sensor size and weight
  • Sensor robustness (no activation of the system due to e.g. temperature drift, ageing drift and changes in optics)
  • Automatic compensation of changes in the environment

Comparison of E909.23 vs. competitor’s approach

Elmos: HALIOS® Differential Measurement

Competitor: Absolute Measurement

+ High sensitivity even with high optical cross talk
+ Very high robustness against flickering light and high ambient light
+ Reduced software support due to easy implementation of calibrations procedures
+ Good sensitivity without cover
– Needs high resolution of the PD signal
– Needs good temperature drift and offset compensation
– Needs additional component for integration


Our Solution - System Constellation

Simple System

1D Touchless control

  • System cost
  • Standard sensitivity
  • Proximity
  • On/Off via Swipe or Tap

Performance System

2D Touchless control

  • System cost
  • Standard sensitivity or extended range
  • Proximity
  • Swipe

High End System

3D Touchless control

  • Standard sensitivity or extended range
  • Proximity
  • 2D Swipe
  • TimeSelect

On/Off and dimming control

  • 1 x E909.23
  • 1 x LED + 1 X C-LED
  • 1 x Photodiode

Robust On/Off and dimming control

  • 1 x E909.23
  • 2 x LEDs + 1X C-LED
  • 1 x Photodiode

Gesture Control

  • 1 x E909.23
  • 3 x LEDs + 1 x C-LED
  • 1 x Photodiode


What requirements should the sensor cover fulfil?

The transmittance of the sensor cover should be at least 80% at 940nm. The thickness of the cover should be less than 3 mm and the air gap between sensor and cover less than 2 mm.

What is the impact of the cover on the function of the sensor if it does not meet the minimum requirements?

A spot sensor can also be operated with the covers that do not meet the minimum requirements, but a reduction in sensor range must be expected.

Does the pollution of the cover have an impact on the functioning of the sensor?

The usual pollution such as fingerprints are automatically calibrated out and have no influence on the functionality of the sensor.

What is the average current consumption of the sensor?

The average current consumption of one spot sensor with three LEDs and 4ms sampling rate is 50mA.

How to reduce current consumption?

The current consumption can be reduced by using the auto mode of E909.23.

What does Auto Mode mean?

In Auto mode, E909.23 manages the measurement and detection of the object itself. The system main controller is woken up by an interrupt and can be set to sleep mode in the absence of the object to be recognized.

Can the power consumption also be reduced by the low sampling rate?

Yes, power consumption can also be reduced by lowering the sampling rate. The E909.23 is able to switch between "gesture mode" with a high sampling rate for fast movements and "wait mode" with a low sampling rate for lowest power consumption.


If you have any questions, don't hesitate to contact us