US 2015/0317464 A1 · Selective Infrared Filtering for Imaging-Based User Authentication and Visible Light Imaging

Abstract

A device (100) includes an infrared light source (114), an imaging sensor (212), and an electrochromic filter (214) overlying the imaging sensor. The electrochromic filter is configurable between at least a first filter state and a second filter state, whereby the second filter state has a higher infrared light transmittance than the first filter state. The device further includes a controller (314) to reconfigure the electrochromic filter from the first filter state to the second filter state responsive to a user authentication event. The device further may include a processing component (302) to trigger the infrared light source to emit infrared light and to process an infrared light image captured by the imaging sensor, the infrared light image including a reflection of the emitted infrared light. The processing component may process the infrared light image by performing a user recognition process using the infrared light image.

Claims20

Dependent claims

A device comprising:

an infrared light source;
an imaging sensor;
an electrochromic filter overlying the imaging sensor, the electrochromic filter configurable between at least a first filter state and a second filter state, the second filter state having a higher infrared light transmittance than the first filter state;
and
a controller to reconfigure the electrochromic filter from the first filter state to the second filter state responsive to a user authentication event.

2 more elements

Dependencies are inferred from the claim text.

Selective Infrared Filtering for Imaging-Based User Authentication and Visible Light Imaging

Life of this patent

Selective Infrared Filtering for Imaging-Based User Authentication and Visible Light Imaging

Life of this patent

Abstract

Claims20