Abstract:
The present invention relates to a luminous element, and more particularly, to a luminous element which is formed with a pressure adjusting portion. As the luminous element has the pressure adjusting portion formed on a housing or substrate, although liquid resin leaks out of a mold due to an abnormally high pressure in the mold when forming a molding portion by cast molding, the grooved pressure adjusting portion is filled with leaking liquid resin and the pressure in the mold decreases, so that the molding portion can be normally formed and the leaking liquid resin can be prevented from running down to thereby reduce a failure rate in forming a luminous element.
Abstract:
Disclosed herein is a method of making a light emitting device having an LED die and a molded encapsulant made by polymerizing at least two polymerizable compositions. The method includes: (a) providing an LED package having an LED die disposed in a reflecting cup, the reflecting cup filled with a first polymerizable composition such that the LED die is encapsulated; (b) providing a mold having a cavity filled with a second polymerizable composition; (c) contacting the first and second polymerizable compositions; (d) polymerizing the first and second polymerizable compositions to form first and second polymerized compositions, respectively, wherein the first and second polymerized compositions are bonded together; and (e) optionally separating the mold from the second polymerized composition. Light emitting devices prepared according to the method are also described.
Abstract:
A light emitting diode is disclosed. The diode includes a package support and a semiconductor chip on the package support, with the chip including an active region that emits light in the visible portion of the spectrum. Metal contacts are in electrical communication with the chip on the package. A substantially transparent encapsulant covers the chip in the package. A phosphor in the encapsulant emits a frequency in the visible spectrum different from the frequency emitted by the chip and in response to the wavelength emitted by the chip. A display element is also disclosed that combines the light emitting diode and a planar display element. The combination includes a substantially planar display element with the light emitting diode positioned on the perimeter of the display element and with the package support directing the output of the diode substantially parallel to the plane of the display element.
Abstract:
A process is described for wavelength conversion of LED light using phosphors. LKD dies are tested for correlated color temperature (CCT), and binned according to their color emission. The LEDs (12) in a single bin are mounted on a single submount (24) to form an array of LEDs. Various thin sheets (51, 52, 53, 54) of a flexible encapsulant (e.g., silicone) infused with one or more phosphors are preformed, where each sheet has different color conversion properties. An appropriate sheet (51) is placed over an array of LED (12) mounted on a submount (24) , and the LEDs (12) are energized. The resulting light is measured for CCT. If the CCT is acceptable, the phosphor sheet (51) is permanently laminated onto the LEDs (12) and submount (24) . The lamination (51) encapsulates each LED (12) to protect the LEDs (12) from contaminants and damage. The LEDs (12) in the array of LEDs on the submount (24) are separated. By selecting a different phosphor sheet for each bin of LEDs, the resulting CCT is very uniform across all bins.
Abstract:
Es wird ein optoelektronisches Bauelement mit einem Gehäuse und einem in dem Gehäuse angeordneten Lumineszenzdiodenchip (1) angegeben, das eine Nutzstrahlung emittiert. Das Gehäuse weist ein für die Nutzstrahlung durchlässiges Gehäusematerial (5) auf, das zum Einstellen einer vorgegebenen Strahlstärke oder Lichtstärke der emittierten Nutzstrahlung gezielt mit Strahlungsabsorbierenden Partikeln (6) versetzt ist. Durch die Strahlungsabsorbierenden Partikel (6) wird die Strahlstärke oder die Lichtstärke gezielt um einen definierten Wert verringert, um so eine vorgegebene Strahlstärke oder Lichtstärke für das Bauelement einzustellen. Es wird zudem ein Verfahren zum Herstellen eines derartigen optoelektronischen Bauelements angegeben.
Abstract:
An LED package includes an LED die and a light-transmissive material encapsulating the die. The encapsulant is formed by dispensing a curable material onto a substrate, such as a carrier on which is mounted the LED die, to form a liquid mass thereon, the liquid mass having an unconstrained smooth outer surface. The dispensed material is then cured to convert the liquid mass to a solid encapsulant having an outer encapsulant surface, the curing being performed under conditions to provide the outer encapsulant surface with undulating surface features. The encapsulant can alternatively be formed on a release liner or other film and after curing be affixed to an LED, such as an LED die, an LED die mounted to another substrate, or an LED die mounted to another substrate and encapsulated initially in another light transmissive material.
Abstract:
Methods of packaging a semiconductor light emitting device in a reflector having a moat positioned between a lower and an upper sidewall thereof, the upper and lower sidewall defining a reflective cavity, include dispensing encapsulant material into the reflective cavity including the light emitting device therein to cover the light emitting device and to form a convex meniscus of encapsulant material in the reflective cavity extending from an edge of the moat without contacting the upper sidewall of the reflector. The encapsulant material in the reflective cavity is cured. Packaged semiconductor light emitting devices and reflectors for the same are also provided.
Abstract:
A light emitting die package is disclosed. The die package includes a substrate, a reflector plate, and a lens. The substrate may be made from thermally conductive but electrically insulating material or from a material that is both thermally and electrically conductive. In embodiments wherein the substrate is made from an electrically conductive material, the substrate further includes an electrically insulating, thermally conductive material formed on the electrically conductive material. The substrate has traces for connecting to a light emitting diode (LED) at a mounting pad. The reflector plate is coupled to the substrate and substantially surrounds the mounting pad. The lens substantially covers the mounting pad. Heat generated by the LED during operation is drawn away from the LED by both the substrate (acting as a bottom heat sink) and the reflector plate (acting as a top heat sink). The reflector plate includes a reflective surface to direct light from the LED in a desired direction.
Abstract:
In order to apply an optical element, such as a lens, to an optoelectronic component, the surface (3B) of the filling material (3), said surface facing away from the transmitter or receiver (2), is directly provided with a lens profile (7). To this end, the recess (1A) of the supporting body (1) is filled with a defined quantity of transparent filling material (3) in order to embed the transmitter or receiver (2), and a lens profile (7) is subsequently stamped onto the surface (3B) of the transparent filling material (3), said surface facing away from the transmitter or receiver, by means of a stamp (8) before the transparent filling material with the lens profile (7), which is stamped thereon in such a manner, is completely hardened.
Abstract:
Zum Aufbringen eines optischen Elements, wie beispielsweise einer Linse, auf ein optoelektronisches Bauelement wird vorgeschlagen, die dem Sender oder Empfänger (2) abgewandte Oberfläche (3B) des Füllmaterials (3) direkt mit einem Linsenprofil (7) auszubilden. Dies geschieht erfindungsgemäss durch Einfüllen einer definierten Menge des transparenten Füllmaterials (3) in die Ausnehmung (1A) des Trägerkörpers (1) zum Einbetten des Senders oder Empfängers (2) und durch anschliessendes Aufprägen eines Linsenprofils (7) auf die dem Sender oder Empfänger abgewandte Oberfläche (3B) des transparenten Füllmaterials (3) mittels eines Stempels (8), bevor das transparente Füllmaterial mit dem so aufgeprägten Linsenprofil (7) vollständig ausgehärtet wird.