摘要:
In an embodiment, the invention provides a PLCC package comprising first and second lead frames, a plastic structural body, a light source, an encapsulant, and an optical lens. The first lead frame comprises two tongues and a reflector cup. The first and second lead frames are attached to the plastic structural body. The light source is mounted and electrically connected at the bottom of the inside of the reflector cup. The light source is also electrically connected to the second lead frame by a wire bond. The reflector cup is surrounded on at least four sides by the encapsulant, the encapsulant having a domed portion that functions as the optical lens, the encapsulant being an integral single piece structure.
摘要:
A light emitting device with at least one LED die, a filter element and a reflective element. The filter element may be configured to preferentially attenuate light passing through the filter element, such that light output has improved color uniformity when compared to similar light emitting devices without a filter element.
摘要:
Methods of making a light emitter are disclosed herein. An embodiment of a method comprises fabricating a line of first leads, the line of first leads comprising a plurality connected individual first leads; fabricating a line of second leads, the line of second leads comprising a plurality of connected individual second leads; physically connecting the line of first leads to the line of second leads, wherein a first individual first lead is adjacent a first individual second lead; attaching a light emitting device to the first individual first lead; electrically connecting the light emitting device to the first individual second lead; encapsulating a portion of the individual first lead and a portion of the individual second lead as a single unit; and separating the encapsulated first individual lead and the second individual lead from the first line of leads and the second line of leads.
摘要:
A light source is described herein. An embodiment of the light source comprises a mounting surface and a first lead frame. The first lead frame extends from the mounting surface. The first lead frame comprises a first portion extending from the mounting surface; a cup portion having a cup portion first side and a cup portion second side, the cup portion first side configured to receive a light-emitting diode, the cup portion second side being located opposite the cup portion first side; and a second portion extending between the first portion and the cup portion second side.
摘要:
A light source having a first mixing chamber, a light pipe structure, and a controller is disclosed. The first mixing chamber includes a first plurality of LEDs, the first mixing chamber having a first transparent window through which light from the first plurality of LEDs exits the first mixing chamber. The light pipe structure has a first end optically coupled to the window such that light from the first plurality of LEDs enters the first end and a second end through which the light exits. The controller determines the power that is applied to the first plurality of LEDs and includes a photodetector optically coupled to the second end of the light pipe structure. The photodetector generates signals indicative of an intensity of light generated by the LEDs, the controller causing the LEDs to be powered such that the signal matches a target value.
摘要:
A light source that generates light having an output optical spectrum is disclosed. The light source includes first and second LEDs and a layer of phosphor that is excited by light from the first LED. The layer of phosphor is positioned to convert a portion of the light from the first LED in a first LED optical spectrum to light having a phosphor spectrum. The second LED emits light in a second LED optical spectrum. The first and second LEDs are powered such that the output optical spectrum includes the first and second optical spectrums and the phosphor spectrum such that the output spectrum is more constant as a function of wavelength at wavelengths between 450 nm to 650 nm than the first or second optical spectrums or the phosphor spectrum. The invention can provide a white LED light source with improved color rendering.
摘要:
Method for packaging a photo detector integrated circuit (IC) and a pigment filter and resulting package are described. An encapsulated package (e.g., an epoxy-encapsulated package) that includes a first surface is provided. A filter layer is then coated directly onto the first surface. The filter layer provides optical filtering properties (e.g., a predetermined filtering profile) in addition to the filtering provided by the pigment filter.
摘要:
Method for packaging a photo detector integrated circuit (IC) and a pigment filter and resulting package are described. An encapsulated package (e.g., an epoxy-encapsulated package) that includes a first surface is provided. A filter layer is then coated directly onto the first surface. The filter layer provides optical filtering properties (e.g., a predetermined filtering profile) in addition to the filtering provided by the pigment filter.
摘要:
In an embodiment, the invention provides a light source comprising a plurality of light-emitting semiconductor chips, a plurality of electrical leads and an encapsulant. The plurality of electrical leads is connected to the plurality of light-emitting semiconductor chips. The encapsulant completely encases the plurality of semiconductor chips. The encapsulant partially encases the plurality of electrical leads.
摘要:
Methods of making a light emitter are disclosed herein. An embodiment of a method comprises fabricating a line of first leads, the line of first leads comprising a plurality connected individual first leads; fabricating a line of second leads, the line of second leads comprising a plurality of connected individual second leads; physically connecting the line of first leads to the line of second leads, wherein a first individual first lead is adjacent a first individual second lead; attaching a light emitting device to the first individual first lead; electrically connecting the light emitting device to the first individual second lead; encapsulating a portion of the individual first lead and a portion of the individual second lead as a single unit; and separating the encapsulated first individual lead and the second individual lead from the first line of leads and the second line of leads.