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
System and method for histogram computation using a graphics processing unit
B. braunii, race B gene for a triterpene methyltransferase enzyme and uses thereof
Anti-tarnish coatings
Medical image processing apparatus, X-ray computed tomography apparatus, and medical image processing method
Method and arrangement for tracking the maximum power point of a photovoltaic module
System and method for reduced feedback in multiuser multiple input, multiple output wireless communications
Systems and methods for managing data incidents
  Randomly Featured Patents
Display device for vehicles
Hybrid piezo-film continuous line and discrete element arrays
Particulate flow enhancing additives
Vehicle brake system
Reinforced side door support structure
System and method for providing statistics gathering within a packet network
Helmet with a pad quick release apparatus
Viral amplification of recombinant messenger RNA in transgenic plants
Rejecting noise transients while turning off a fluorescent lamp using a starter unit
Abrading device having a front exhaust