VISIBLE LIGHT EMITTING DEVICES INCLUDING UV-LIGHT EMITTING DIODE AND UV-EXCITABLE, VISIBLE LIGHT EMITTING PHOSPHOR, AND METHOD OF PRODUCING SUCH DEVICES

摘要

Light emitting displays and lamps are produced by photo pumping UV excitable phosphors with UV emitting GaN-based light emitting diodes (LEDs). Resonant cavities are incorporated into the LED structures to both narrow and heighten the emission spectrum. Color displays are produced from arrays of individual LED-phosphor combinations of different colors. Such LED pumped phosphor devices do not require a vacuum environment and operate at much lower voltages than the electron beam pumped phosphor screens of cathode ray tubes (CRTs).