Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Type II broadband or polychromatic LEDs










Image Number 4 for United States Patent #8148742.

An LED is provided comprising two or more light-emitting Type II interfaces wherein at least two of the Type II interfaces differ in transition energy by at least 5%, or more typically by at least 10%, and wherein at least one of the Type II interfaces is within a pn junction. Alternately, an LED is provided comprising two or more light-emitting Type II interfaces wherein at least two of the Type II interfaces differ in transition energy by at least 5%, or more typically by at least 10%. The Type II interfaces may include interfaces from a layer which is an electron quantum well and not a hole quantum well, interfaces to a layer which is a hole quantum well and not an electron quantum well; and interfaces that satisfy both conditions simultaneously. The Type II interfaces may be within a pn or pin junction or not within a pn or pin junction. In the later case, emission from the Type II interfaces may be photopumped by a nearby light source. The LED may be a white or near-white light LED. In addition, graphic display devices and illumination devices comprising the semiconductor device according to the present invention are provided.








 
 
  Recently Added Patents
Supplier capability methods, systems, and apparatuses for extended commerce
Mobile communication device and method for providing positioning information
Headphone
Systems and methods for printing images outside a normal color gamut in image forming devices
Semiconductor device having trapezoidal shaped trenches
Generating wiki pages from content and transformation objects
Particle-loaded membrane for solid-phase-extraction and method for performing SALDI-MS analysis of an analyte
  Randomly Featured Patents
Adjustable feeding device for the administration of dosages of gels and pastes to farm animals
Awning
Device to aid in the removal of residual textile material from a core element
Microwave antenna having a ground isolated feedhorn
Flame retardant polycarbonate having improved critical thickness
Array architecture and operating methods for digital multilevel nonvolatile memory integrated circuit system
Topical composition enhancing healing of viral lesions
Disposable device for the continuous centrifugal separation of a physiological fluid
Virtualized consistency group using an enhanced splitter
Wind-resistant window sash lock