Method for joining flexible foils comprising LEDs

    公开(公告)号:US12007082B2

    公开(公告)日:2024-06-11

    申请号:US18271099

    申请日:2021-12-22

    摘要: The present invention relates to a method for joining at least two flexible foils (10a-b). The method comprises the steps of (i) providing a first flexible foil (10a) having a first row (12) of light emitting diodes (14) and a first set of electrically conductive tracks (16) for supplying current to the first row (12) of light emitting diodes (14), (ii) providing a second flexible foil (10b) having a pot second row (12) of light emitting diodes (14) and a second set of electrically conductive tracks (16) for supplying current to the second row (12) of light emitting diodes (14), and (iii) joining the first flexible foil (10a) and the second flexible foil (10b) at an overlap (22) of the first flexible foil (10a) and the second flexible foil (10b), wherein a metal strip or wire (24; 24) gets embedded between the first flexible foil (10a) and the second flexible foil (10b) at the overlap, and wherein the metal strip or wire (24; 24) electrically connects to the first and second sets of electrically conductive tracks (16).

    Optical system and lighting device

    公开(公告)号:US11347038B2

    公开(公告)日:2022-05-31

    申请号:US17419145

    申请日:2020-01-14

    摘要: An optical system (10) is disclosed comprising a plurality of solid state lighting elements (30, 30′, 30″) belonging to different groups, wherein solid state lighting elements of different groups produce luminous outputs having different spectral compositions, a collimator array (20) comprising a plurality of domains (23, 23′, 23″), each domain comprising a plurality of collimators (21, 21′), wherein within each domain each collimator is arranged to collimate the luminous output of at least one solid state lighting element such that each domain contains a number of solid state lighting elements arranged in a spatial pattern, said number consisting of a fixed ratio of solid state lighting elements from each group, and wherein said spatial pattern is varied between domains and a lenslet plate (40) having a first lenslet array on a first surface (41) facing the collimator array and a second lenslet array identical to the first lenslet array on a second surface (43) opposing the first surface, wherein each lenslet (42) of the first lenslet array is aligned with a corresponding lenslet (44) of the second lenslet array. Each lenslet array is composed of a plurality of unit cells (46) comprising a plurality of lenslets in a defined pattern, each of said domains being aligned with one of said unit cells. Also disclosed is a lighting device (1) comprising such an optical system (10).