US 12,288,515 B2
Auxiliary-channel-based method for capturing images using a display screen
Bruno Charrat, Aix en Provence (FR)
Assigned to Ledger, Paris (FR)
Appl. No. 18/580,501
Filed by Ledger, Paris (FR)
PCT Filed Jul. 21, 2022, PCT No. PCT/FR2022/051451
§ 371(c)(1), (2) Date Mar. 29, 2024,
PCT Pub. No. WO2023/002130, PCT Pub. Date Jan. 26, 2023.
Claims priority of application No. 2107865 (FR), filed on Jul. 21, 2021.
Prior Publication US 2024/0321194 A1, Sep. 26, 2024
Int. Cl. G09G 3/3208 (2016.01); G06F 3/14 (2006.01); G06V 40/12 (2022.01); G06V 40/13 (2022.01)
CPC G09G 3/3208 (2013.01) [G06F 3/14 (2013.01); G06V 40/1318 (2022.01); G06V 40/1341 (2022.01); G09G 2330/021 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for generating an image signal of an object by means of a display device including a display screen comprising light-emitting diodes arranged in rows and columns, the method comprising:
by means of the display screen, displaying a series of images (In−In+3) each representing one respective pattern, the display of each pattern causing the activation of at least one LED of the display device and leading to the emission of a light beam that may be identical or different to the preceding light beam depending on whether the displayed pattern is identical or different to the pattern of the preceding image,
acquiring a plurality of measurements of the power consumption of the display device during the display of each image (In−In+3),
acquiring a plurality of measurements of the variations in the power consumption of the display device, each measurement of a variation in the power consumption being representative of a divergence between a measurement of the power consumption of the display device during the display of an image and a measurement of the power consumption of the display device during the display of a preceding image of the series of images (In−In+3),
and wherein the measurements of the power consumption of the display device are synchronized with the successive selection of LEDs during the display of each image of the series of images (In−In+3).