A luminous glazing unit (100, 200, 300, 400) for a vehicle, comprising: - a first pane of mineral or organic glass having a first main face, a second main face (12, 13) and a side face, - a peripheral light source which has an emitting face and is formed by light-emitting diodes, each comprising a semiconductor chip on a profiled section for supporting the diodes, the emitting face facing an edge of the second face referred to as the injection face for propagation of the injected visible and/or ultraviolet, so-called UV, light in the thickness of the first pane, the first pane then acting as a guide for the injected light, the injection edge optionally being partly recessed or with a step, - means for forming at least one luminous region, namely: - means for extracting the guided light via the first and/or second main face, which are scattering means on the surface of the first and/or second main face or scattering means in the volume of the first pane, - and/or, when the injected light is UV light, means for converting the UV light into visible light via the first and/or second main face, which are luminescent materials in particular on the first and/or second main face, - an optional attached peripheral functional element bonded to the first pane, which is leaktight against fluid(s) and is selected from an overmolding or a prefitted element, - a cap covering the source, which is leaktight against fluid(s), in particular liquid water or water vapor, - the so-called facial cap, that is to say essentially one facing the second face, and which is secured by fastening means - to the first pane, in particular made of organic glass - and/or to a connecting piece bonded to the first pane, - and optionally to the functional element, the cap and the diode support being removable from the glazing unit, and the diode support at least is provided, advantageously before its integration into the glazing unit, with at least one moisture protection layer and/or an encapsulation such as a varnish of the silicone, epoxy or acrylic type. - a first pane of mineral or organic glass having a first main face, a second main face (12, 13) and a side face, - a peripheral light source which has an emitting face and is formed by light-emitting diodes, each comprising a semiconductor chip on a profiled section for supporting the diodes, the emitting face facing an edge of the second face referred to as the injection face for propagation of the injected visible and/or ultraviolet, so-called UV, light in the thickness of the first pane, the first pane then acting as a guide for the injected light, the injection edge optionally being partly recessed or with a step, - means for forming at least one luminous region, namely: - means for extracting the guided light via the first and/or second main face, which are scattering means on the surface of the first and/or second main face or scattering means in the volume of the first pane, - and/or, when the injected light is UV light, means for converting the UV light into visible light via the first and/or second main face, which are luminescent materials in particular on the first and/or second main face, - an optional attached peripheral functional element bonded to the first pane, which is leaktight against fluid(s) and is selected from an overmolding or a prefitted element, - a cap covering the source, which is leaktight against fluid(s), in particular liquid water or water vapor, - the so-called facial cap, that is to say essentially one facing the second face, and which is secured by fastening means - to the first pane, in particular made of organic glass - and/or to a connecting piece bonded to the first pane, - and optionally to the functional element, the cap and the diode support being removable from the glazing unit, - means for extracting the guided light via the first and/or second main face, which are scattering means on the surface of the first and/or second main face or scattering means in the volume of the first pane, - and/or, when the injected light is UV light, means for converting the UV light into visible light via the first and/or second main face, which are luminescent materials in particular on the first and/or second main face, - an optional attached peripheral functional element bonded to the first pane, which is leaktight against fluid(s) and is selected from an overmolding or a prefitted element, - a cap covering the source, which is leaktight against fluid(s), in particular liquid water or water vapor, - the so-called facial cap, that is to say essentially one facing the second face, and which is secured by fastening means - to the first pane, in particular made of organic glass - and/or to a connecting piece bonded to the first pane, - and optionally to the functional element, the cap and the diode support being removable from the glazing unit, - a cap covering the source, which is leaktight against fluid(s), in particular liquid water or water vapor, - the so-called facial cap, that is to say essentially one facing the second face, and which is secured by fastening means - to the first pane, in particular made of organic glass - and/or to a connecting piece bonded to the first pane, - and optionally to the functional element, the cap and the diode support being removable from the glazing unit,