Diode pumped solid state edge emitting light source

Details Diode pumped solid state edge emitting light source Diode pumped solid state edge emitting light source

1998-07-15

2000-12-12

Jackson, Jr., Jerome

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

With reflector, opaque mask, or optical element integral...

257103, 257 40, 313504, H01L 3300

Patent

active

061602736

ABSTRACT:
A OLED-based edge emitter mitigates the problem of unacceptably large losses by physically separating the OLED from the waveguide using an optical cladding layer. An additional advantage over conventional surface emitting OLEDs used in image bars is the pixel aspect ratio of the edge emitter. The pixel-aspect ratio is narrow in the process direction forming a rectangle. This rectangular shape allows movement to make an effective square. Therefore, emission modulation can be performed at a high duty-cycle because the edge is much shorter in the process direction than in the lateral, i.e., fast scan direction. As a result, the duty cycle of the light source can be higher, i.e., the light source is on for a longer time, without smearing an irradiated spot into locations corresponding to adjacent pixels.

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