Abstract:
PROBLEM TO BE SOLVED: To provide a solution for achieving high image-forming quality even if the luminance is the same. SOLUTION: An optical device comprises at least a first light-emitting device (LE1) and a second light-emitting device (LE2), and at least a light adder (1). The optical device is constituted such that the lights from the first and second light-emitting devices (LE1, LE2) are added to form one light beam. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To present a light-emitting diode (LED) chip that already has elements for improving the radiation output coupling and/or to convert electromagnetic radiation, thus to miniaturize a light-emitting device. SOLUTION: The LED chip, which has an array of epitaxially grown semiconductor layers, is so structured that the LED has a covering object transmitting radiation, the covering object is put on a radiation output coupling surface postpositioned in an LED chip radiation direction and has a first principal plane oriented in the radiation output coupling surface, a second principal plane oriented toward a direction which is reverse to that of the radiation output coupling surface, and a side surface that connects the first and second principal planes, and a junction layer is arranged between the radiation output coupling surface and the covering object, which directly joins and fixes the covering object to the semiconductor layer array, and the junction layer includes at least one conversion layer that has a light-emitting conversion material. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
The invention relates to an even backlighting of surfaces by means of semiconductor light sources. Different semiconductor light sources are combined to form identical light groups. According to the invention, said identical light groups are arranged in such a way that an even backlighting of a surface is made possible. In order to achieve a homogeneous color mixture, particularly at the edges, each light group of the arrangement has at least one adjacent light group emitting in a different direction.
Abstract:
The invention relates to a lighting device which comprises a radiation-emitting front and a plurality of light sources (R, G, B). The inventive lighting device is characterized in that the plurality of light sources (R, G, B) are subdivided into light source groups (LG) and the light source groups (LG) are disposed on the grid points of a first regular grid (3).
Abstract:
An illumination device (1) for backlighting a display is disclosed. The illumination device comprises: at least one semiconductor body (3), suitable for generating electromagnetic radiation of a first wavelength range, a first wavelength conversion substance (30), which is disposed downstream of the radiation-emitting front side (6) of the semiconductor body (3) in the emission direction (8) thereof and is suitable for converting radiation of the first wavelength range into radiation of a second wavelength range, which is different from the first wavelength range, and a second wavelength conversion substance (31), which is disposed downstream of the radiation-emitting front side (6) of the semiconductor body (3) in the emission direction (8) thereof and is suitable for converting radiation of the first wavelength range into radiation of a third wavelength range, which is different from the first and second wavelength ranges. A display comprising such an illumination device (1) is furthermore described.
Abstract:
One embodiment of the invention proposes a light-emitting device comprising a radiation source for the emission of a radiation having at least a first wavelength, and an elongated, curved light-guiding body, into which the radiation emitted by the radiation source is coupled and which couples out light at an angle with respect to its longitudinal axis on account of the coupled-in radiation having the first wavelength.
Abstract:
An illumination device is specified which has a light source (1) suitable for coupling divergent electromagnetic radiation (6) into an optical waveguide (2), the electromagnetic radiation (6) being guided in the optical waveguide (2) on the basis of total reflection, the optical waveguide (2) being suitable for changing a main radiating direction (17) of the electromagnetic radiation (6), and the optical waveguide (2) being formed in one piece. Light-emitting diodes are preferably used as the light source (1). The illumination device is particularly well suited to the backlighting of displays.
Abstract:
Licht emittierende Vorrichtung umfassend:- eine Strahlungsquelle (5) zur Emission einer Strahlung (11) zumindest einer ersten Wellenlänge, wobei die Strahlungsquelle (5) kurzwellige Strahlung im UV-Bereich und/oder im blauen Spektralbereich emittiert,- einen elongierten, gekrümmten Lichtleitkörper (20) der eine Glasfaser mit einem Kern (20C) umfasst, wobei in den Lichtleitkörper (20) die von der Strahlungsquelle emittierte Strahlung (11) eingekoppelt wird und der auf Grund der eingekoppelten Strahlung (11) erster Wellenlänge Licht (12) in einem Winkel zu seiner Längsachse auskoppelt, wobeider Lichtleitkörper (20) ein Konvertermaterial (15) aufweist, das die Strahlung (11) erster Wellenlänge in Licht (12) einer zweiten, größeren Wellenlänge konvertiert,- eine Detektionsvorrichtung (25), die eine Beschädigung des Lichtleitkörpers (20) detektieren kann, wobei die Detektionsvorrichtung (25) eine zweite Strahlungsquelle (25E) zur Emission einer Strahlung (13) einer dritten Wellenlänge sowie einen Detektor (25D) zur Detektion der Strahlung (13) der dritten Wellenlänge umfasst, wobei die Detektion der Strahlung (13) der dritten Wellenlänge eine Funktionsfähigkeit des Lichtleitkörpers (20) anzeigt,- die Strahlung (11) erster Wellenlänge und die Strahlung (13) dritter Wellenlänge in den selben Kern (20C) des Lichtleitkörpers (20) eingekoppelt werden.