US 11,941,909 B2
Biometric imaging device comprising color filters and method of imaging using the biometric imaging device
Arvid Hammar, Gothenburg (SE); and Hans Martinsson, Gothenburg (SE)
Assigned to FINGERPRINT CARDS ANACATUM IP AB, Gothenburg (SE)
Appl. No. 18/249,263
Filed by FINGERPRINT CARDS ANACATUM IP AB, Gothenburg (SE)
PCT Filed Nov. 23, 2021, PCT No. PCT/SE2021/051164
§ 371(c)(1), (2) Date Apr. 17, 2023,
PCT Pub. No. WO2022/108515, PCT Pub. Date May 27, 2022.
Claims priority of application No. 2051364-4 (SE), filed on Nov. 23, 2020.
Prior Publication US 2023/0410550 A1, Dec. 21, 2023
Int. Cl. G06V 40/13 (2022.01); G02B 5/20 (2006.01); G02B 5/28 (2006.01); G06F 3/041 (2006.01); G06V 40/12 (2022.01)
CPC G06V 40/1318 (2022.01) [G02B 5/204 (2013.01); G02B 5/28 (2013.01); G06F 3/0412 (2013.01); G06V 40/1324 (2022.01); G06V 40/1365 (2022.01)] 14 Claims
OG exemplary drawing
 
1. A display arrangement comprising:
a display panel having an array of light emitting elements; and
an optical biometric imaging device arranged underneath the display panel, the optical biometric imaging device comprising:
an image sensor comprising a plurality of photodetector pixels;
a lens arrangement comprising at least one lens configured to focus light reflected by a biometric object onto the image sensor;
an aperture layer arranged between the object to be imaged and the image sensor, wherein the aperture layer comprises an aperture configured to limit the amount of light reaching the image sensor; and
a filter element arranged within the aperture and configured to block light within a first wavelength range, wherein an area of the filter element is smaller than an area of the aperture so that a portion of light within the first wavelength range reaching the aperture layer pass through the aperture;
wherein at least a portion of the display corresponding to a location of the biometric imaging is controllable to operate in a first biometric imaging mode to emit light comprising wavelengths within the first wavelength range and in a second biometric imaging mode to emit light comprising wavelengths outside of the first wavelength range.