Abstract:
The invention relates to an illumination device and a method adapted for illuminating applications. The illumination device (5) with a phosphor (1) comprising at least one light emitting surface which is adapted for emitting phosphor light in a predefined solid angle, a light source (2) being adapted for emitting optical radiation directed to the phosphor (1), a waveguide (3), and a reflector (4), wherein the phosphor (1) is optically coupled to the waveguide (3), the exit surface of the illumination device (5) from which light is emitted is larger than any single light emitting surface of the phosphor (1), and the reflector (4) is adapted for reflecting at least a part of the optical radiation emitted from the illumination device (5) by a surface different from the exit surface of the illumination device (5). In this way, a high light extraction efficiency from a single surface of a luminescent material and at the same time a high quantum efficiency of the illumination device is achieved.
Abstract:
The present invention relates to an organic light emitting device (OLED) (100;200;400;800;900;1000;1100;1200) comprising a first substrate layer (101;201;401;501;701;1004;1104;1205) and a second substrate layer(102;202; 402;502;704; 1005;1105;1206). The device (100;200;400;800;900;1000;1100;1200) further comprises at least a first OLED assembly (103;403;503;901;1001;1101;1202) and a second OLED assembly (104;404;504;902;1002;l 102;1203) arranged between the first and the second substrate layers. Each of the first and second OLED assemblies comprises a first electrically conductive layer(105;505;703), a second electrically conductive layer (106;506;706) and an organic light emitting layer (107;507;507';707) arranged between the first and the second electrically conductive layer. The organic light emitting device (100;200;400;800;900;1000;1100;1200) of the invention allows for an increased light intensity and is suitable for large area applications.
Abstract:
There is provided a lighting device arranged to produce light at different colors and color temperatures. The lighting device comprises a light emitting diode (LED) and is based on a movable wavelength conversion device. The wavelength conversion device is arranged such that only one type of at least first and second wavelength conversion elements is at one time exposed to receiving light in a light mixing chamber. A phosphor coated holder can be in direct contact with a heat sink of the LED. A phosphor coated plate can be hidden behind a holder with an opening. By moving the holder or the phosphor plate with respect to each other another part of the phosphor plate can be exposed to the light emitted by the LED.
Abstract:
The invention relates to a laser device for projection systems, comprising: a laser (1) emitting a pump laser beam at a pump wavelength, a first cavity arrangement with a first cavity and a crystal being adapted for generating a first laser beam at a first wavelength, when pumped with the pump laser beam, a second cavity arrangement with a second cavity and a crystal being adapted for generating a second laser beam at a second wavelength when pumped with the pump laser beam, and an optical arrangement (3) for sequentially directing the pump laser beam, the first laser beam and the second laser beam to an output (6) of the laser device, wherein the second wavelength is different from the first wavelength, and the first wavelength and the second wavelength are in the visible spectral range and are higher than the pump wavelength. The first cavity arrangement and the second cavity arrangement may comprise a common crystal, whereby a cavity switch is provided for sequentially switching the first cavity and the second cavity to the common., crystal, respectively. Alternatively, the first cavity arrangement comprises a first crystal (4) and the second cavity arrangement comprises a second crystal (5) being different from the first crystal (4), and a optical switch (2) is provided for sequentally switching the pump laser beam to the first cavity arrangement and to the second cavity arrangement, respectively.
Abstract:
The invention relates to a spectral detector for measuring properties of light over portions of the electromagnetic spectrum including cholesteric liquid crystal material and switching means capable of varying the pitch of the helix of the cholesteric liquid crystal material, so that the position of the transmission wavelength band is adjusted in response to the switching means. The spectral detector may further include at least one light direction selecting structure for selecting light incident on the spectral detector having a certain angle of incidence. This invention also relates to a lighting system including the spectral detector of the invention.
Abstract:
The invention relates to a vehicle light system (1) comprising a laser device (2) for generating a laser beam (3), further comprising a light output module (6) provided with a phosphor element (7) for emitting a light beam (8) upon incidence of the generated laser beam and provided with an optical element (9) associated with the phosphor element (7) for producing a light output beam. Furthermore, the light system comprises a further light output module provided with a corresponding further phosphor element and a second optical element. The laser device is arranged to switch between a first state, in which the generated laser beam is directed to the phosphor element, and a second state in which the generated laser beam is directed to the further phosphor element.
Abstract:
This invention relates to a light angle selecting light detector device comprising a detector unit which is arranged to receive light selected by a selector unit. The device comprising at least one set of light passing areas. Each set of light passing areas consists of a first light passing area having a first size, which first light passing area is located on a first surface, and a second light passing area having a second size, which second light passing area is located on a second surface. The first light passing area and the second light passing area are arranged with a lateral displacement and form a light path from the first surface to the second surface for light having an incident angle between a maximum angle and a minimum angle.
Abstract:
A color conversion device (10; 20; 30; 40; 51; 60), for adjusting a color of light emitted by a light-source, the color conversion device comprising a beam-shaping member (11; 54; 61; 70; 80; 90; 100) configured to change a shape of a beam of light interacting with the beam-shaping member; and at least a first wavelength converting member (12; 22a-b; 31; 41a-b; 56; 62a-g) configured to absorb light having a first wavelength distribution, and, in response thereto, emit light having a second wavelength distribution, different from the first wavelength distribution. The beam-shaping member (11; 54; 61; 70; 80; 90; 100) is controllable to direct a first fraction of the beam of light towards the first wavelength converting member (12; 22a-b; 31; 41a-b; 56; 62a-g), where a wavelength distribution of the first fraction is converted, thereby enabling color adjustment of the beam of light.
Abstract:
The present invention relates to a lamp unit (501) for an adaptive front lighting system (AFS) (500) for a vehicle (100). The lamp unit (501) comprises a liquid crystal element (200/200') arranged to receive light emitted by a light source (502), which liquid crystal element (200/200') has a first state in which it is adapted to transmit incoming light without substantially refracting said incoming light, and a second state in which it is adapted to refract said incoming light when the light passes through said liquid crystal element. This allows light to be altered without any mechanical movements in or of the lamp unit (501). The present invention also relates to an AFS (500) comprising such a lamp unit (501), and a vehicle (100) comprising such an AFS (500).
Abstract:
The present invention relates to a mirror device, the reflectivity of which may be varied by means of applying a voltage . According to an aspect of the invention, there is provided a mirror device, the reflectivity of which may be varied by means of applying a voltage, comprising a cholesteric filter (33) which is arranged to be gradually switchable between a reflective and a transparent state by varying said voltage, and a display device (32) arranged to be at least partly covered by the cholesteric filter, wherein said display device is visible when the cholesteric filter is set in the transparent state and hidden when the cholesteric filter is set in the reflective state.