Patent ID: 11885476
Assignee: COLAS
Field: Civil engineering (Other fields)
Classification: CPC F  E | IPC E  F

Claim 17:
18. A method for manufacturing a light slab that has, successively, a first protective film arranged on a front face of the slab and made of a first material, a first external encapsulating film made of a second material, an internal encapsulating film made of a third material, a second external encapsulating film made of a fourth material, and a second protective film arranged on a rear face of the slab and made of a fifth material, one of the films, chosen among the first external encapsulating film, the internal encapsulating film and the second external encapsulating film, coating at least one active element adapted to emit light, and each active element having at least one light element on a support allowing the at least one light element to be powered,
the method comprising the following steps:
(a) providing at least one active element adapted to emit light comprising at least one light element on a support allowing the at least one light element to be powered;
(b) positioning the at least one active element adapted to emit light on a stack comprising the second protective film and the second external encapsulating film;
(c) laminating the internal encapsulating film on the at least one active element in such a way as to fill at least in part the spaces between the active elements with the material of the internal encapsulating film, and to cover at least partially the at least one active element with the material of the internal encapsulating film; and
(d) laminating on the internal encapsulating film a stack comprising the first external encapsulating film and the first protective film.