Abstract:
The present invention relates to a lighting device (10), comprising: at least one light source (12); a detector (16) for detecting the distance (d) to an object; and a control unit (14) adapted to turn on the light source(s) upon detection of the distance if the at least one light source is off, and to adjust the brightness of the light source(s) in relation to the detected distance. The present invention also relates to a method for controlling a lighting device.
Abstract:
The present invention relates to a flexible light source (100), adapted to be bent in at least one direction so as to form a line of curvature (Lc), comprising a translucent substrate (104), at least one light emitting diode (102) arranged to emit light into said substrate, and at least one light guide (103) arranged in the path of light between said at least one light emitting diode and said substrate. By placing the LEDs on the rear side of the translucent substrate, heat generated during operation of the LEDs may be transferred to the surrounding atmosphere, thus reducing the risk of overheating. In this way, the LEDs may be operated at temperatures which promote their efficient and long-lasting performance.
Abstract:
A discharge lamp includes a body portion having inner and outer body walls and first and second ends. The inner body wall defines at least part of a cavity located between the first and second ends. First and second end parts have inner end-part and outer end-part walls and a hole extending between the inner end-part wall and the outer end-part wall. The first and second end parts are each located, at least in part, within the cavity and separate from each other so as to maintain a gas under pressure. First and second electrodes are included in the cavity. An antenna has first and second antenna ends and is formed on the outer body wall of the body portion and the outer end-part wall of at least one of the first and second end parts. The antenna is not directly connected to the first and second electrodes.
Abstract:
The invention relates to a color-tunable illumination system (10), to a lamp and to a luminaire. The color-tunable illumination system comprises a light source (20) emitting light of a first predefined color (B), and comprises a luminescent material (30) for converting light of the first predefined color into light of a second predefined color (A). The color-tunable illumination system further comprises shielding means (40, 42) arranged for preventing at least part of the light emitted by the light source to impinge on the luminescent material. The light source, the luminescent material and/or the shielding means are changeable from a first situation to a second situation. In the first situation the color-tunable illumination system is arranged for shielding at least part of the luminescent material against impinging light of the first predefined color. In the second situation the color-tunable illumination system is arranged for shielding less of the luminescent material to the light of the first predefined color emitted by the light source compared to the first situation. The effect of the measures according to the invention is that the shielding means, luminescent material and/or the light source determine an amount of light of the second predefined color emitted by the color-tunable illumination system which determines a color of the color-tunable illumination system.
Abstract:
A discharge lamp includes a body portion having inner and outer body walls and first and second ends. The inner body wall defines at least part of a cavity located between the first and second ends. First and second end parts have inner end-part and outer end-part walls and a hole extending between the inner end-part wall and the outer end-part wall. The first and second end parts are each located, at least in part, within the cavity and separate from each other so as to maintain a gas under pressure. First and second electrodes are included in the cavity. An antenna has first and second antenna ends and is formed on the outer body wall of the body portion and the outer end-part wall of at least one of the first and second end parts. The antenna is not directly connected to the first and second electrodes.
Abstract:
The invention relates to a color-tunable illumination system (10; 12; 14) and a luminaire. The color-tunable illumination system comprises a first light source comprising a first set of light emitting diodes (21, 24), and a second light source comprising a second set of light emitting diodes (31, 37, 34). Both the first and second light source emit light of substantially a first predefined color into a light mixing chamber (60). The light mixing chamber further comprises a first luminescent material (50) converting light of the first predefined color into light of a second predefined color. The first light source is positioned with respect to the first luminescent material for illuminating the first luminescent material with a first flux of light being part of the light emitted by the first light source into the light mixing chamber. The second light source is positioned with respect to the first luminescent material for illuminating the first luminescent material with a second flux of light being part of the light emitted by the second light source into the light mixing chamber. The first flux is different from the second flux. The effect of the measures according to the invention is that a change in the intensity of the light emitted by the first light source relative to the intensity of the light emitted by the second light source results in a change of the color emitted by the color- tunable illumination system.
Abstract:
The invention relates to a high- intensity discharge lamp (1) comprising a discharge vessel (2) and electrodes (4, 5) extending into said discharge vessel for emitting visible light. An electrically conductive screening (16), which is translucent to said emitted light, is provided on said discharge vessel. By applying the screening directly on the discharge vessel, the screening is brought closer to the source of EMI and, consequently, the EMI screening performance of the lamp is improved. The invention also relates to a headlight of a motorized vehicle provided with such a lamp, and a method of manufacturing such a lamp.