Projection type image display with adjustable lens holding structure
AssigneeHitachi, Ltd.
InventorsFusamitsu Tsubata, Kazumasa Ueoka, Mikio Shiraishi, Hiroto Miura, Nobuyuki Honda
Life of this patent
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Abstract
Adjustment of the illumination range to a liquid crystal panel of a liquid crystal projector requires time in fixing upon adjustment and accordingly it is an object to make the adjustment effectively. In an adjustment mechanism of the illumination range of illumination means to the liquid crystal panel in an optical engine unit of the liquid projector, the spring property is provided in a lens holder for holding a lens and the lens is temporarily held by friction of the spring portion to the optical engine case after adjustment. Then, the adhesion processing is made to complete the adjustment.
Claims20
A projection type image display apparatus comprising:
- illumination means;
- plurality of lenses which guide illumination light coming from said illumination means;
- a light valve which modulates the illumination light guided through said plurality of lenses;
- a projection lens which projects the modulated light from said light valve means;
- and
- a holding member which holds said plurality of lenses;
- and
- an intermediate holding member including a protrusion, a spring portion bent by pressing said protrusion against said holding member, and a frame for mounting one of said plurality of lenses to said intermediate holding member.
Dependencies are inferred from the claim text.