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A directly addressed monolithic LED array as a projection source
Author(s) -
Lee Vincent W.,
Kymissis Ioannis
Publication year - 2010
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid18.10.808
Subject(s) - brightness , projection (relational algebra) , light emitting diode , optoelectronics , optics , materials science , power consumption , power (physics) , diode , light source , optical power , computer science , physics , laser , algorithm , quantum mechanics
— Light‐emitting‐diode arrays have been fabricated and demonstrated by several groups in a variety of applications in which structured illumination is desired, such as direct‐view displays and fluorescence detection. State‐of‐the‐art LEDs can achieve a high optical power density, exceeding 40 W/cm 2 . This allows the use of such LEDs, if patterned into an array, as a light and pattern source for projection displays. As a proof of principle, a projection source using a monolithically integrated patterned LED array at a power density of 0.69 W/cm 2 , a source brightness of 21,000,000 cd/m 2 , and a projected brightness of 100,000 cd/m 2 is reported. It is shown that an improved version of such a display would allow significantly better power consumption and overall system efficiency than permitted by current projection‐display concepts.