Patent ID: 11885476
Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Field: Civil engineering (Other fields)
Classification: CPC F  E | IPC E  F

Claim 0:
1. A light slab able to be integrated into a trafficable pavement, comprising in succession:
a first protective film, arranged on a front face of the slab, 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, 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,
each active element comprising at least one light element on a support allowing the at least one light element to be powered, and
the first material, the second material, the third material, the fourth material, and the fifth material having Young's moduli E1, E2, E3, E4, and E5, respectively, and coefficients of thermal expansion CTE1, CTE2, CTE3, CTE4, and CTE5, respectively,
values of E1 and E5 differing by no more than 30%,
values of E2 and E4 differing by no more than 30%,
E1>E2 and E4<E5,
CTE1 and CTE5 differing by no more than 30%,
CTE2 and CTE4 differing by no more than 30%,
CTE1<CTE2 and CTE4>CTE5.