Abstract:
An automotive light (1) having a substantially tub- shaped rear casing (2) designed to fit to the vehicle body; and a front lenticular half-shell (3), which closes the opening (2a) of the rear casing (2) and has at least one portion of transparent or semitransparent material; the front lenticular half-shell (3) having a rear portion (3a) substantially aligned with the rear of the vehicle body, and a lateral portion (3b) substantially aligned with the side of the vehicle body; the automotive light (1) also having a strip light source (4) designed to emit light when powered electrically, and which is housed inside the rear casing (2) in a position facing the rear portion (3a) of the front lenticular half-shell (3); and a light guide plate (7) of photoconductive material, which is shaped to substantially match the profile of the strip light source (4), and is housed inside the rear casing (2) in a position substantially perpendicular to the rear portion (3a) of the front lenticular half-shell (3), so that a first side (7a) of the plate faces the strip light source (4) to catch and conduct the light from the strip light source (4) into the body of the light guide plate (7), and a second side (7b) of the plate, opposite the first side (7a), faces the rear portion (3a) of the front lenticular half-shell (3) to direct the light propagating in the light guide plate (7) onto the lenticular half-shell (3); the two faces of the light guide plate (7) being designed to conduct to the second side (7b) of the plate the light entering the body of the light guide plate (7) from the first side (7a); and one of the two faces of the plate having a transverse light-extracting band (7c), which extends substantially from the first side (7a) of the plate to the second side (7b) of the plate, and is designed to locally extract the light, propagating in that limited portion of the light guide plate (7), onto the lateral portion (3b) of the front lenticular half- shell (3), so as to form a transverse light strip on the lateral portion (3b) of the front lenticular half-shell (3).
Abstract:
An automotive light (1) comprising a substantially basin-shaped, rear body (2)," which is structured so as to be fixed to the vehicle body, a front lenticular half-shell (3), which is provided with at least one portion made of transparent or semitransparent material and is arranged to close the mouth (2a) of the rear body (2), and at least one main light source (4), which is structured so as to emit light when electricity powered and is arranged within the rear body (2) in a position so as to backlight a corresponding transparent or semitransparent portion of the front lenticular half- shell (3); the automotive light (1) further comprising a light-guide bar (6) made of a photoconductive material, which has a substantially circular- or elliptical-shaped cross-section and is arranged inside the rear body (2), and an auxiliary light source (7), which is arranged within the rear body (2), close to at least one end of the light-guide bar (6), so as to direct the produced light into the body of said light-guide bar (6); said light-guide bar (6) being provided with a substantially flat, longitudinal light-extracting stripe (8), which extends along the lateral side of the light-guide bar (6), and with a multitude of transverse deflecting prisms (9), which are appropriately distributed along the longitudinal light-extracting stripe (8), and with a series of additional transversal deflecting grooves or ridges (10), which are appropriately distributed/spaced apart along the outer curved surface (6a) of the light- guide bar (6), which is immediately adjacent to the longitudinal light-extracting stripe (8) and are profiled so as to divert the light rays which reach the same transversal ridges or grooves (10) towards the corresponding transparent or semitransparent portion of the front lenticular half -shell (3).
Abstract:
An automotive light (1) comprising a rear shell (2) which is substantially tub-shaped and is structured so as to be fixed onto the vehicle body; a front lenticular half-shell (3) which is provided with at least one portion made of transparent or semitransparent material, and is arranged to close the mouth (2a) of the rear shell (2); and at least a first main light source (4) which is structured so as to emit light when electricity powered, and is placed within the rear shell (2) in such a position as to backlight a corresponding transparent or semitransparent portion of the front lenticular half- shell (3); the automotive light (1) further comprising at least one light-guiding section-bar (6) made of light-conducting material, which is placed on the bottom of a corresponding slot or groove (7) specifically obtained within the rear shell (2), right underneath a corresponding transparent or semitransparent portion of the front lenticular half-shell (3); and at least one auxiliary light source (8) which is structured so as to emit light when electricity powered, and is placed within the rear shell (2), close to at least one of the two ends of the light-guiding section-bar (6), so as to direct the emitted light directly into the body of the light-guiding section-bar (6); the light-guiding section-bar (6) made of light-conducting material being provided with a cross section substantially circular or elliptic in shape, and with a longitudinal flat bevel (6a) facing the bottom of the slot or groove (7) and structured so as to cause the light travelling in the light-guiding section-bar (6) to exit towards the transparent or semitransparent portion of the lenticular half-shell (3) above the light-guiding section-bar (6).
Abstract:
Light (30) for motor vehicles and the like provided with a lighting device (31) comprising a pair of power supply lines (42, 43) flowed through by a primary supplying current (I1), two or more lighting branches (34) each comprising one or more light sources (37) adapted for being flowed through by a secondary supplying current (I2i); and an electronic control circuit (33) configured to determine the secondary current (I2i) flowing through each lighting branch (34); limit the primary supplying current (I1) to a predetermined minimum value (I1M) when the secondary current (I2) flowing through at least one of said lighting branches (34) is lesser than a predetermined threshold current (Si); control the simultaneous transition of the light sources (37) from a pre-lighting state to a complete-lighting state, when each of the secondary currents (I2i) flowing through the lighting branches (34) is greater than or equal to the predetermined current threshold (Si).
Abstract:
A method for injection moulding of plastic -material lenticular bodies (1) for lights; of motor vehicles and similar, the method comprising the steps of coupling a punch half-mould (15) with a first matrix half-mould (13) so as to define, on the surface of the punch half -mould (15), a first closed cavity that copies in reverse the shape of a first plastic-material sheet (2); filling said first cavity with a first plastic polymer in a liquid state, injecting the first plastic polymer in the first cavity from an injection point located at said first segment of the peripheral edge (2a) of the first plastic-material sheet (2); and finally separating, after the first plastic polymer has solidified to form the first plastic -material sheet (2), the punch half- mould (15) from the first; matrix half -mould (13) maintaining the first plastic-material sheet (2) still on the surface of the punch half -mould (15).
Abstract:
Automotive light (1) comprising a light-guide bar (6) made of photoconductive-material, which is at least partially positioned substantially grazing a corresponding transparent or semitransparent portion of the front lenticular half-shell (3) of the light, and a second light source (7) which is structured so as to emit light when electricity powered, and is arranged inside the rear body (2), close to one end of the light- guide bar (6), so as to direct the light produced inside the body of said light-guide bar (6); the light-guide bar (6) being provided with a longitudinal light-extractor band (8) which extends along the lateral side of the bar, and a multitude of- deflector prisms (9) which have an approximately triangle-shaped cross-section and are conveniently arranged along the longitudinal light-extractor band (8); one or more deflector prisms (9) being shaped so that the active deflector surface (9a) has a bulging/arched profile substantially over, the whole width (w) of the longitudinal band (8).
Abstract:
An automotive light (1) comprising at least one main light source (4) structured so to emit light when powered with electricity, and a cup-shaped body (3) that houses within itself said main light source (4), and has the inner surface (3i) structured so to direct the produced light towards the mouth (3a) of said cup-shaped focusing body (3); the automotive light (1) further comprising a) a first light-guiding sheet (7) which is made of photoconductive material and extends along the mouth (3a) of the cup-shaped focusing body (3), and a corresponding first auxiliary light source (8) which is arranged facing a side edge of said first light-guiding sheet (7), is structured so to emit light when powered with electricity, and is finally oriented so that the light emitted by the same light source enters inside the body of said first light-guiding sheet (7) through the side edge of the same light-guiding sheet (7); and b) at least one second light-guiding sheet (9) which is made of photoconductive material and extends along the mouth (3a) of the focusing cup-shaped body (3), so as to at least partially overlap with the first light-guiding sheet (7), and a corresponding second auxiliary light source (10) which is arranged facing a side edge of said second light-guiding sheet (9), is structured so to emit light when electricity powered, and is oriented so that the light emitted by the same light source enters inside the body of said second light-guiding sheet (9) through the side edge of the same light-guiding sheet (9); said first (7) and said second light-guiding sheet (9) being both structured so to cause the selective escape of the light produced by said second auxiliary light source (10), through at least one part of its front face.
Abstract:
An incandescent light-bulb socket (1) of the type structured to support a light-bulb (2) provided with a glass bulb (3) housing the incandescent filament, and with a connection plug (4) which is placed to close the neck of the glass bulb (3), and is structured so as to be fitted within the socket; said connection plug (4) being provided with a headpiece (4a) housing the terminals of the rheophores which conduct the electric current to the filament, and with a peripheral flange (4b) which overhangly protrudes from the body of the plug (4), between the neck of the glass bulb (3) and the headpiece (4a) of the plug; the incandescent light-bulb socket (1) comprising: a supporting platform (5) which is provided with a coupling seat (5a) shaped so as to accommodate/house the portion of the plug (4) beneath the peripheral flange (4b); electrical connection means (6) placed close to the bottom of the coupling seat (5a), and structured so as to touch the plug headpiece (4a) at the terminals of the rheophores, when the plug (4) is completely inserted into the coupling seat (5a); and a light-bulb retaining member (8) which is placed on the supporting platform (5), substantially at the mouth of the coupling seat (5a), and is structured so as to hook the peripheral plug flange (4b) to prevent the plug (4) from being subsequently extracted from the coupling seat (5a), and so as to continuously exert an elastic traction force on the peripheral flange (4b) of the plug (4) which occupies the coupling seat (5a), which force is directed towards the bottom of the coupling seat (5a).
Abstract:
Automotive light (1) comprising at least one cup-shaped body (3) that has the inner surface (3i) mirror-finished so as to reflect the incident light towards the mouth (3a) of the main cup-shaped body (3) itself, and at least one light source (4) which is located within the main cup-shaped body (3), and is structured so as to emit light when electricity powered, the inner surface
Abstract:
LED driver circuit for powering at least one LED string comprises: at least one lighting switching element (TLEDA; TLEDB), connected to the LED string and operable to switch at least between an inactive state, in which it prevents the passage of a driver current (ILED) into said LED string, and an active state, in which it imposes a driver current (ILED) through said LED string, The driver current is dependent on a driver voltage (Vref) applied to the lighting switching element. The circuit further comprises switch driver circuit means (10, 20, 40) suitable for generating a driver voltage (Vref) which depends in a substantially linear manner on the power supply voltage (VDD).