Light assembly for a motor vehicle including a shaped film

A lamp module (10) for a motor vehicle comprising a housing (12) covered by a translucent cover (14) which separates the lamp module from the external surroundings of the vehicle lamp module, the housing and the translucent cover defining between them an internal chamber (18), the lamp module (10) further comprising, within the internal chamber (18):

• at least one functional layer (31) comprising an emitting surface (31L) facing the translucent cover (14), configured to transmit light rays exiting from its emitting surface (31L) in at least a predetermined direction,
• a light guide (24) made of an optically transmitting material comprising an emitting surface (24L) facing the functional layer (31),
• a plurality of light sources (22) comprising light-emitting diodes, located opposite an entry surface (24E) of the light guide and configured to emit light rays into the light guide (24),
• characterized in that the functional layer (31) comprises a thermoformed sheet (31) made of an optically transmitting material that is attached, at a first end (31A), to a first internal surface (16SA) of the lamp module (10) located at a first end (16A) of the internal chamber and, is attached at a second end, to a second internal surface of the lamp module (10) located at a second end of the internal chamber, the sheet being shaped so as to form, between said first end (31A) and said second end, a curved section (34) facing the emitting surface (24L) of the light guide, the emitting surface (24L) of the light guide and the curved section (34) of the sheet being separated by an air gap (36) having a width the value of which is above 10 mm (0.4 in).