Abstract: A decontamination apparatus for disinfecting a surface can include a flexible textile, an array of LEDs, and a flexible cover layer. The flexible textile can have a first side facing a first direction and a second side facing a second direction opposite the first direction. The array of LEDs can be configured to output radiation in at least two separate wavelength ranges corresponding to an ultraviolet radiation range and an infrared radiation range. The flexible cover layer can cover the array of LEDs and be transparent to at least the ultraviolet radiation range. The flexible cover layer can comprise a plurality of projections configured to maintain a consistent distance between the array of LEDs and a surface to be disinfected. The flexible textile, the array of LEDs, and the flexible cover layer can be coupled together to form a flexible blanket that conforms to a contour of the surface.

Abstract: An optical system having a light guide (3) and a reflector (6) is described. The light guide transports, during use, light from a first end (30) to a second end (31) of the light guide. The light guide has an entrance surface (2) at the first end for allowing incident light to enter the light guide at an entrance axis (8). The light guide further has a coupling element (5) at the second end for coupling light out of the light guide at a coupling axis (9) for illuminating the reflector. The light guide further has a solid rod-like guiding section (32) for guiding light entered in the light guide from the first end to the coupling element. The rod-like guiding section has one or more bends (33,34). Each light ray of the light guided to the coupling element is reflected in the bend (s) one or more times. The reflector receives light coupled out of the light guide and reflects the received light for providing a directed beam at a beam axis (9).

Abstract: The invention provides an illumination device (100) comprising a translucent exit window (200), one or more transmissive windows (300), arranged upstream from LED(s) and downstream from the translucent exit window (200), and one or more luminescent material layers (400), which may particularly be coated to the downstream and upstream faces of the transmissive windows (300).

Abstract: An optical system having a light guide (3) and a reflector (6) is described. The light guide transports, during use, light from a first end (30) to a second end (31) of the light guide. The light guide has an entrance surface (2) at the first end for allowing incident light to enter the light guide at an entrance axis (8). The light guide further has a coupling element (5) at the second end for coupling light out of the light guide at a coupling axis (9) for illuminating the reflector. The light guide further has a solid rod-like guiding section (32) for guiding light entered in the light guide from the first end to the coupling element. The rod-like guiding section has one or more bends (33,34). Each light ray of the light guided to the coupling element is reflected in the bend (s) one or more times. The reflector receives light coupled out of the light guide and reflects the received light for providing a directed beam at a beam axis (9).

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.

Abstract: The invention provides an illumination device (100) comprising a translucent exit window (200), one or more transmissive windows (300), arranged upstream from LED(s) and downstream from the translucent exit window (200), and one or more luminescent material layers (400), which may particularly be coated to the downstream and upstream faces of the transmissive windows (300).

Abstract: A light-emitting diode comprises a chip emitting visible light of a first wavelength, a light-emitting surface and a phosphor layer provided on the light-emitting surface. Said phosphor layer is capable of converting light of the first wavelength to visible light of a second wavelength. According to the invention, a part of the light-emitting surface is not covered with the phosphor layer. Preferably, the size of said surface is chosen to be such that by mixing emitted light of the first and the second wavelength substantially white light is obtained. Preferably, the surface that is not covered with the phosphor layer comprises a plurality of sub-surfaces, preferably arranged in the form of a pattern.

Abstract: A compact backlight system for illuminating a display device (12) has a light-emitting panel (1) with a front wall (2) and an opposed rear wall (3) and with edge surfaces (4, 5). At least one of the edge surfaces (4) is light-transmitting. The backlight system has a light source (6) comprising a limited number of LEDs. Light from the light source (6) is coupled into the light-emitting panel (1) via the edge surface that is light-transmitting. According to the invention, the light-emitting panel (1) is wedge-shaped, and the surface area Si of the light-transmitting edge surface (4) and the surface area Sr of the opposite edge surface (5) fulfill the relation: 1<(Sr/Si)<10, preferably 1.5<(Sr/Si)<5. Light travelling for the first time from the light-transmitting edge surface through the light-emitting panel (1) towards the opposite edge surface (5) cannot be coupled out of the light emitting panel (1).

Abstract: A compact backlight system for illuminating a display device has a front wall and a rear wall situated opposite thereto. At least one light source comprising a light-emitting diode is provided with a translucent lens-shaped cover. The system has at least one light input structure for coupling light from the light source into the light-emitting panel. During operation, light originating from the light source is incident on the light input structure and distributes itself in the light-emitting panel. According to the invention the light input structure is conically or frustoconically shaped towards the light source. The thickness dp of the light-emitting panel is smaller than the diameter dc of the translucent lens-shaped cover of the light source. Preferably, the light input structure is of prismatic or pyramidal shape.

Abstract: A light-emitting diode comprises a chip (1) emitting visible light of a first wavelength, a light-emitting surface and a phosphor layer provided on the light-emitting surface. Said phosphor layer is capable of converting light of the first wavelength to visible light of a second wavelength. According to the invention, a part of the light-emitting surface is not covered with the phosphor layer. Preferably, the size of said surface is chosen to be such that by mixing emitted light of the first and the second wavelength substantially white light is obtained. Preferably, the surface that is not covered with the phosphor layer comprises a plurality of sub-surfaces, preferably arranged in the form of a pattern.

Abstract: A compact backlight system for illuminating a display device having a light-emitting panel, said system comprising at least one light source for emitting a light beam to a light guide (6) placed next to the light source, wherein the light guide (6) is provided with an input surface (1) facing said light source for receiving the light beam originating from the light source, and with an output surface (2) facing away from the light source for transmitting the light beam guided in the light guide (6). According to the invention the light guide (6) transforms the light beam received into the transmitted light beam by means of translation and/or rotation.