Abstract: The invention describes a light conversion module (100) comprising a transparent substrate (120), a conversion layer (110) attached to a light exit side of the substrate (120), wherein the conversion layer (110) is arranged to convert a part of laser light (10) of a first wavelength range entering the substrate (120) via a light entrance side to converted laser light (20) of a second wavelength range different from the first wavelength range, and to transmit another part of the laser light (10), such that a mixture of the transmitted laser light (15) and of a part of the converted laser light (20) leaves the conversion layer (110) in forward direction opposite to the side where the conversion layer (110) is attached to the light exit side of the substrate (120), and wherein the substrate (120) is arranged such that converted laser light (20) entering the substrate via the light exit side is inhibited to re-enter the conversion layer (110) via the light exit side by arranging a thickness of the substrate (120)

Abstract: The invention provides a lighting system for generating patterned phosphor-converted output beams for projection onto a pixelated display unit (24). A phosphor screen arrangement (18) comprises a plurality of separate light-receiving surface regions (34), each region (34) illuminated by an individually addressable laser source arrangement. By controlling the relative intensity of light directed to each of the surface regions (34), a broad range of different output beam patterns can be created from the phosphor screen arrangement (18). The generated beam pattern may be controlled so as to correspond with the pixel configuration of the display unit (24), such that light is directed only toward pixels (26) which are active, rather than inactive. This enables significant improvements in optical efficiency, since light need not be wasted through propagation toward pixels (26) which are configured simply to discard it.

Abstract: A lighting system includes a light source such as a laser, a scanning system such as a micro-mechanical mirror, and a converter element such as a phosphor. A redirection element is arranged in the optical path and has a discontinuity so that light is redirected to spaced apart locations on the converter element from adjacent locations on either side of the discontinuity. The redirection element increases the light's angular range. The lighting system may have a lens to project a desired pattern of light on the converter element forwards. A controller may control the scanning system to produce the desired pattern of light. The lighting system may adapt the pattern of light. The lighting system may be used in automotive applications.

Abstract: The present invention relates to an electrical gas-discharge lamp comprising an inner bulb (1) arranged within an outer bulb (2), said inner bulb (1) being filled with a discharge gas and comprising a first electrode (3) and an opposing second electrode (4) having a distance from the first electrode (3) which allows ignition of a gas-discharge by applying an ignition voltage between the electrodes (3, 4). At least one through hole (11) is formed in the feedthrough to the electrically conductive lead (5) to the first electrode (3). An electrically conductive member (10) extents within a space formed between the inner (1) and the outer bulb (2) from a position close to the through hole (11) to a distance from the second electrode (4) which is smaller than the distance between the two electrodes (3,4).

Abstract: The present invention relates to an electrical gas-discharge lamp comprising an inner bulb (1) arranged within an outer bulb (2), said inner bulb (1) being filled with a discharge gas and comprising a first electrode (3) and an opposing second electrode (4) having a distance from the first electrode (3) which allows ignition of a gas-discharge by applying an ignition voltage between the electrodes (3, 4). At least one through hole (11) is formed in the feedthrough to the electrically conductive lead (5) to the first electrode (3). An electrically conductive member (10) extents within a space formed between the inner (1) and the outer bulb (2) from a position close to the through hole (11) to a distance from the second electrode (4) which is smaller than the distance between the two electrodes (3,4).

Abstract: A lighting device and a method for operating a discharge lamp are described. In one embodiment, the discharge lamp comprises a sealed discharge vessel and two electrodes to produce an arc. A driver circuit delivers electrical power to the electrodes. In a run-up interval, electrical power is supplied as an alternating current IL. During the run-up interval, the waveform of the alternating current IL is changed at least once to a spot-enforcing waveform in order to change the mode of attachment of the arc to the electrodes to spot mode.

Abstract: A lighting device and a method for operating a discharge lamp (10) are de-scribed. The discharge lamp (10) comprises a sealed discharge vessel and two electrodes (22) to produce an arc. A driver circuit (20) delivers electrical power to the electrodes (22). In a run-up interval (56), electrical power is supplied as an alternating current IL. During the run-up inter-val (56), the waveform of the alternating current IL is changed at least once to a spot-enforcing waveform in order to change the mode of attachment of the arc to the electrodes (22) to spot mode.

Abstract: The invention describes a gas-discharge lamp (1) comprising a discharge vessel (11) arranged in an outer quartz glass envelope (12), which gas-discharge lamp (1) comprises a local thermal area contact (2) between a lower surface (21) of a localised deformation (20) of the outer envelope (12) and a corresponding isolated area (22) on the outer surface (23) of the discharge vessel (11). The invention also describes a method of manufacturing a gas-discharge lamp (1), which method comprises the steps of arranging a discharge vessel (11) in an outer quartz glass envelope (12); forming a localised deformation (20) of the outer envelope (12) to create a local thermal area contact (2) between a lower surface (21) of the localised deformation (20) and a corresponding isolated area (22) on the outer surface (23) of the discharge vessel (11).

Abstract: A high pressure gas discharge lamp includes a discharge vessel with electrodes that project into a discharge space of a volume of 12-20 mm3. The discharge space has a filling of rare gas and a metal halide composition which is free of mercury. The metal halide composition includes at least halides of Sodium and Scandium with a mass ratio of halides of Sodium and Scandium of 0.9-1.5. The lamp further includes an outer enclosure provided around the discharge vessel. The outer enclosure is sealed and filled with a gas at a pressure below 1 bar. The lamp has an efficiency equal to or greater than 90 Im/W in a steady state operation at an electrical power of 25 W.

Abstract: The invention describes a mercury-free high-intensity gas-discharge lamp (1) comprising a discharge vessel (5) enclosing a filling in a discharge chamber (2) and comprising a pair of electrodes (3, 3?, 4, 4?) extending into the discharge chamber (2), for which lamp (1) the electrodes (3, 3?, 4, 4?) are free of thorium, and the filling includes a halide composition comprising at least 6 wt % thorium iodide.

Abstract: A high pressure gas discharge lamp 10 is described with a discharge vessel 20. Electrodes 24 project into a discharge space 22 of a volume of 12-20 mm3. The discharge space has a filling of rare gas and a metal halide composition which is free of mercury. The metal halide composition comprises at least halides of Sodium and Scandium with a mass ratio of halides of Sodium and Scandium of 0.9-1.5. The lamp 10 further comprises an outer enclosure 18 provided around the discharge vessel 20, which is sealed and filled with a gas at a pressure below 1 bar. The lamp 10 has an efficiency equal to or greater than 90 lm/W in a steady state operation at an electrical power of 25 W.