Konica Minolta, Inc.

Konica Minolta Opto, Inc.

Norio Maeda

Kazuhiko Inoue

Yasumasa Sawai

Masahiro Terada

Takashi Ohta

Kohei Wataru

A projection type image display apparatus () comprises a focus correction system (). The system includes a temperature detection mechanism () for measuring temperature in the vicinity of a projection lens group (), a correction amount calculation unit () for calculating a correction amount for correcting the focus shift caused by a temperature change, and a driving signal generation unit () for generating, based on the correction amount, a driving signal for driving a focus adjustment mechanism (). If the user performs a focus adjustment using a focus operation input unit (), a focus operation determination unit () determines that a focus adjustment has occurred independently of the focus correction system and changes a correction condition stored in a memory ().

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Moriguchi, Japan

Norio Maeda