Patent ID: 11858237
Assignee: SAINT-GOBAIN GLASS FRANCE
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. An external luminous signaling vehicle glazing chosen from a side window or a rear window or a front windshield, comprising:
a first transparent glazing, made of mineral or organic glass, with first and second main faces and an edge face;
a light source on a side of the second main face and able to emit external signaling light, said light source having an exit surface oriented toward the second main face,, wherein the light source is a set of inorganic light-emitting diodes, each diode including at least one semiconductor chip, each diode being able to emit in the direction of the second main face,, wherein, each diode has a main emission direction normal to a plane of an emitting face of the diode, the glazing further including a set of collimation optics, each collimation optic being associated with a light-emitting diode, each collimation optic including a front face oriented toward the second main face and an opposite rear face,, wherein each collimation optic is made of transparent material and includes an array of separate features with apexes S and with a pitch T between apexes that is from 10 μm to 500 μm,, wherein the collimation optic includes:, a) an optical element having a surface that includes said array of separate features said array of separate features being an array of two-dimensional separate features that form a repetitive pattern of said separate features along two different directions,, b) or a set of at least a first and a second optical element that form said array of separate features:
the first optical element including on a first main face a first-array of separate features that are prisms extending longitudinally along a first axis,
and, facing the first optical element, the second optical element including on a second main face a second array of separate features that are prisms extending longitudinally along a second axis making an angle to said first axis of 90±10°,, and wherein the external luminous signaling vehicle glazing comprises a redirection optic, between the collimation optic and the second main face, which includes an asymmetric optical film or a set of asymmetric optical films, each including an array of asymmetric prisms with apexes and with a pitch T′ between apexes that is from 10 μm to 500 μm,, and wherein
air is present between the exit surface of the light source and the rear face of the collimation optic,
the two-dimensional separate features that form the repetitive pattern of said separate features along the two different directions are recessed to form an array of cavities in which air is present in the cavities, or the two-dimensional separate features that form the repetitive pattern of said separate features along the two different directions are raised, and
air is between the asymmetric prisms.