Back to results
US 2007/0182940 A1Published application
Projection display apparatus
OwnerHiromi Asaiinventor
Life of this patent
Estimating the term…
Abstract
A projection display apparatus is provided with a control unit that drives a focus lens included in a projection lens based on outputs from a focus sensor and a temperature sensor. The control unit provided in the projection display apparatus compensates the output value of the temperature sensor according to the amount of change in the output value of the temperature sensor with time and drives the focus lens using the value thus compensated.
Claims5
A projection display apparatus comprising:
- a projection lens that projects an image, the projection lens including a focus lens that moves for focusing;
- a focus sensor;
- a temperature sensor;
- and
- a control unit electrically connected with the focus sensor and the temperature sensor, the control unit driving the focus lens using outputs from the focus sensor and the temperature sensor,
- wherein the control unit compensates the output value of the temperature sensor according to the amount of change in the output value of the temperature sensor with lapse time, and drives the focus lens using the value thus compensated.
3 more elements
Dependencies are inferred from the claim text.