US 2006/0068619 A1Published application

Rear-projection type imaging device

AssigneeOrion Electric Co., Ltd.

InventorsKoichi Tajima, Kenji Shimoshita, Takashi Tokuda

Life of this patent

Estimating the term…

Loading patent…

Abstract

To provide a device capable of effectively shielding noise which constitutes interference is provided without sacrificing miniaturization. A power supply circuit board 60 and an analog signal processing substrate 61 are arranged side by side backward and forward centered on a projection unit 30 and a lamp drive circuit board 64 is disposed at a position far from the analog signal processing substrate 61 across the projection unit 30. A driver circuit board 31, digital circuit board 62 and scaler circuit board 63 are housed in shield cases 39, 70, 71, the shield case 70 is disposed upright so as to separate the power supply circuit board 60 and analog signal processing substrate 61 from the driver circuit board 31, and the three sides of the driver circuit board 31 are surrounded with the shield cases 70, 71 and an uprising section 35b of a support frame 35.

Claims6

Dependent claims

A rear-projection type imaging device comprising:

a lamp unit;
a projection unit which modulates a beam projected from the lamp unit according to image information, forms an optical image and projects an enlarged image of the optical image;
a reflecting mirror which reflects the optical image projected from the projection unit;
a screen exposed on one side of the housing, for projecting the optical image from the reflecting mirror;
and
a housing which houses the lamp unit, projection unit, reflecting mirror and screen,
wherein a support frame for integrating the projection unit and a driver circuit board which drives the projection unit and fixing the projection unit and driver circuit board to the housing is provided,
the support frame comprises at least a bottom plate fixed to the housing and an uprising plate standing from one end of the bottom plate,
the projection unit is fixed to the uprising plate so as to float from the bottom plate, and
at least part of the driver circuit board is disposed in a space formed between the projection unit and the bottom plate and the driver circuit board is fixed to the bottom plate.

7 more elements

Dependencies are inferred from the claim text.