Projection type display apparatus

Details Projection type display apparatus Projection type display apparatus

2011-06-28

2011-06-28

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Reflector

Plural

C353S030000, C353S031000, C353S038000, C353S098000, C353S119000, C353S122000, C359S239000, C359S242000, C359S245000, C359S246000, C359S277000, C359S649000, C359S619000, C359S621000, C359S622000, C359S625000, C359S626000, C359S707000, C372S029010, C372S029014, C372S029015, C372S038070, C372S029011, C372S029020, C372S038010, C455S556100, C455S066100

Reexamination Certificate

active

07967452

ABSTRACT:
A projection type display apparatus is provided that is safe even when a person looks directly into a laser beam. A laser operation control unit sets the output power of at least one laser source so that intensity A (mW/mm2) of the laser beam on at least one spatial light modulation element satisfies relationship of A<686×B2when numerical aperture B on image side of an illumination optics system is set.

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