Abstract: The invention provides a lighting device (100) comprising a light source (10) and luminescent materials (20). The luminescent materials (20) comprise a first organic luminescent material (120) and a second organic luminescent material (220), the light source (10) together with the luminescent materials (20) being configured to generate white lighting device light (101) during operation. The first organic luminescent material (120) degrades with time at a first degradation rate and the second organic luminescent material (220) degrades with time at a second degradation rate, wherein the first degradation rate is larger than the second degradation rate. The first organic luminescent material is configured in a first layer (130, 1020) and the second organic luminescent material is configured in a second layer (140, 1220).

Abstract: A light emitting module (10), adapted to produce white output light having an emission peak in the wavelength range from 400 to 440 nm, comprises:•—at least one first light emitting element (110) adapted to emit light having an emission peak in a first wavelength range from 440 to 460 nm;•—at least one wavelength converting material (85) arranged to receive light emitted by said first light emitting element, and being capable of emitting light having an emission peak in the green to red wavelength range; and•—at least one second light emitting element (120) adapted to emit light having an emission peak in a second wavelength range from 400 to 440 nm. The module according to the invention provides white light of acceptable color rendering with a “crisp white” effect.

Abstract: A color-adjustable light emitting arrangement (100) is provided, comprising •—a solid-state light source (101) adapted to emit light of a first wavelength range (L1); •—a wavelength converting member (102) arranged to receive light of said first wavelength range emitted by the light source and capable of converting light of the first wavelength range into visible light of a second wavelength range (L2); •—a narrow band reflector (103, 104) arranged in a light output direction from the wavelength converting member to receive light of said second wavelength range, said narrow band reflector being reversibly switchable between a first state in which the narrow band reflector reflects a first sub-range of said second wavelength range, and a second state in which the narrow band reflector has a different optical property. The spectral output of the light emitting arrangement is adjustable and may provide a desirable light spectrum for enhancement of different colors.

Abstract: The invention provides alighting unit (100) comprising a light source (10) and a light conversion layer (20). The light source (10) comprises a light emitting diode (LED) (110) and a first luminescent material layer (120) in physical contact with a light emitting surface (115) of the LED (110). The first luminescent material layer (120) comprises a first luminescent material (130), configured to convert at least part of LED light (111) into light (131) having a red component. The light source (10) is configured to generate light (11) having a blue component and having the red component of the light (131). The light conversion layer (20), configured at a non-zero distance (d) from the light source (10), comprises a second luminescent material (30) configured to convert at least part of the light (11) into light (31). The lighting unit (100) is configured to provide white lighting unit light (111).

Abstract: There is provided a light emitting module (1) having at least one light emitting element (3) which is arranged to emit light of a primary wavelength, and a wavelength converting element (5) arranged at a distance from the at least one light emitting element (3). The wavelength converting element (5) is arranged to convert at least part of the light of a primary wavelength into light of a secondary wavelength. Further the module (1) comprises a first optical component (7) having surface structures (11) on a surface facing away from the light emitting element (3). Light rays incident on the first optical component (7) at small angles are reflected and light rays incident on the first optical component (7) at large angles are transmitted and bent towards a normal of the first optical component (7). The invention is advantageous in that it provides a compact and efficient light-directing module.

Abstract: The invention provides a lighting unit comprising a light source, configured to generate light source light, and a light converter, configured remote of the light source and configured to convert at least part of the light source light into luminescent material light. The light converter comprises (a) a yellow light emitting cerium containing garnet luminescent material, (b) a green light emitting luminescent material, (c) a red light emitting organic luminescent material, and (d) a particulate scattering material.

Abstract: The invention relates to an illumination system (100), a projection device, and a color wheel (20, 22, 24). The illumination system comprises a light source comprising a first light-emitting unit (50) and a second light-emitting unit each emitting light towards a light output window (110). The illumination system comprises the color wheel including a spoke (40) between two adjacent color segments. The system is configured to prevent the spoke when transiting the optical path (80) between the light source and the light output window to simultaneously transit a first optical path between the first light-emitting unit and the light output window and a second optical path between the second light-emitting unit and the light output window. The illumination system further comprises a drive unit (92) which is configured for switching off the first light-emitting unit during a time interval (p1) when the spoke transits the first optical path.

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: A method for the manufacture of a wavelength converted light emitting device is provided. A light curable coating material is arranged on the outer surface of a wavelength converted light emitting diode. The light curable coating material is cured, in positions where a high intensity of unconverted LED-light encounters the curable coating material. The method can be used to selectively stop unconverted light from exiting the device, leading to a wavelength converted LED essentially only emitting converted light.

Abstract: The invention relates to a luminescent converter (10, 12) for a phosphor-enhanced light source (100, 102, 104). The luminescent converter comprises a first luminescent material (20) configured for absorbing at least a part of excitation light (hv0) emitted by a light emitter (40, 42) of the phosphor-enhanced light source, and for converting at least a part of the absorbed excitation light into first emission light (hv1) comprising a longer wavelength compared to the excitation light. The luminescent converter further comprising a second luminescent material (30) comprising organic luminescent material (30) and configured for absorbing at least a part of the first emission light emitted by the first luminescent material, and for converting at least a part of the absorbed first emission light into second emission light (hv2) having a longer wavelength compared to the first emission light.

Abstract: Proposed is a lighting device (100), comprising LEDs (130) mounted on a transparent substrate (110), provided with a transparent electrically conductive layer (120) and a contact pad (140). The contact pad has a second part (142), extending away from a first part (141), for further reducing the current density in the conductive layer (120). This is advantageous for making the lighting device robust to large power dissipation, especially under high current testing conditions. Moreover, as the voltage drop over transparent conductive layer is reduced, the efficiency of the lighting device is increased.

Abstract: The invention relates to an illumination system (10, 12), to a remote phosphor layer (30; 32, 34), to a scattering layer (32), to a luminaire (100), to a display device (300) and to a method of at least partially correcting a light emission characteristic of at least one light source (22) in the illumination system. The illumination system comprises an array of light sources (20) and a remote phosphor layer and/or a scattering layer arranged between the array of light sources and a light output window (40) for emitting the light from the light sources. At least one light source of the array of light sources comprises a light emission characteristic different from the other light sources of the array of light sources.

Abstract: A display device (100) comprising a plurality of lighting units (101), each lighting unit comprising at least one light emitting diode (202) being provided with a fluorescent element (203) arranged to absorb at least part of the light emitted by said light emitting diode and emit light of a wavelength range different from that of the absorbed light is provided. The fluorescent element (203) comprises at least one phosphor being an europium(II)-activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3x+4/3y:EuzOaXb.

Abstract: A method for the manufacture of a light emitting device is provided. The method comprises the steps of: providing a substrate (102) on which at least one light emitting diode (101) is arranged and; arranging a collimator (103), at least partly laterally surrounding said at least one light emitting diode, by bonding said collimator to said at least one light emitting diode and said substrate using a transmissive bonding material (104). By using the inventive method, the collimator can be arranged after the placement of the LED, which facilitates the placement of the LED.

Abstract: A method for the manufacture of a wavelength converted light emitting device is provided. A light curable coating material is arranged on the outer surface of a wavelength converted light emitting diode. The light curable coating material is cured, in positions where a high intensity of unconverted LED-light encounters the curable coating material. The method can be used to selectively stop unconverted light from exiting the device, leading to a wavelength converted LED essentially only emitting converted light.

Abstract: The invention relates to an illumination system (100), a projection device, and a color wheel (20, 22, 24). The illumination system comprises a light source comprising a first light-emitting unit (50) and a second light-emitting unit each emitting light towards a light output window (110). The illumination system comprises the color wheel comprising a plurality of color segments (R, G, B), a boundary between two adjacent color segment being a spoke (40). The first light-emitting unit, the second light-emitting unit and the spoke are configured for preventing the spoke when transiting the optical path (80) between the light source and the light output window to simultaneously transit a first optical path between the first light-emitting unit and the light output window and a second optical path between the second light-emitting unit and the light output window.

Abstract: The invention especially provides a display device (1) with a liquid crystal display (LCD) panel (10) and a backlight illumination device (20), wherein the backlight illumination device (20) comprises a light emitting diode package (200) arranged to generate white backlight (251), wherein the light emitting diode package (200) comprises a blue light emitting diode, LED (201), a green luminescent material (203) and a red luminescent material (204); and a transmissive ceramic layer (206), arranged to transmit at least part of the blue emission (249), wherein the transmissive ceramic layer (206) comprises at least part of the green luminescent.material (203) and/or the red luminescent material (204). The LED (201), the green luminescent material (203) and the red luminescent material (204) are arranged to generate white light (250) for backlighting the liquid crystal display panel (10).

Abstract: Proposed is a lighting device (100), comprising LEDs (130) mounted on a transparent substrate (110), provided with a transparent electrically conductive layer (120) and a contact pad (140). The contact pad has a second part (142), extending away from a first part (141), for further reducing the current density in the conductive layer (120). This is advantageous for making the lighting device robust to large power dissipation, especially under high current testing conditions. Moreover, as the voltage drop over transparent conductive layer is reduced, the efficiency of the lighting device is increased.

Abstract: The invention relates to a method for providing a utensil with a decoration by means of an optical interference grating. The utensil is provided with a sol-gel precursor which is embossed with a flexible stamp to create an optical interference grating. The interference grating can be provided with a second precursor of a material with an index of refraction higher than that of the sol-gel layer, and provided with a transparent, non-scattering topcoat. The invention further relates to an appliance, e.g. an iron or a shaver, coated with an organosilane layer provided with an optical interference grating.

Abstract: A light-emitting device (1) is disclosed, which comprises a radiation source (2), an inorganic layer (3) comprising a luminescent material (4); and a scattering layer (5) comprising scattering particles (6). The scattering layer (5) is located between the radiation source (2) and the inorganic layer (3), which is composed of a ceramic material.