DRIVE DEVICE AND PROJECTION-TYPE IMAGE DISPLAY DEVICE
First Claim
Patent Images
1. A drive device comprising:
- a housing in which a gas is sealed, wherein density of the gas is lower than density of air;
a driven object housed inside the housing;
a driver configured to drive the driven object;
a current detector configured to detect a value of a current flowing into the driver while the driven object is driven by the driver; and
a determinator configured to determine a concentration of the gas inside the housing based on the value of the current detected.
1 Assignment
0 Petitions
Accused Products
Abstract
A drive device includes a housing in which a gas is sealed, wherein density of the gas is lower than density of air, a driven object housed inside the housing, a driver configured to drive the driven object, a current detector configured to detect a value of a current flowing into the driver, and a determinator configured to determine a concentration of the gas inside the housing based on the value of the current detected.
-
Citations
9 Claims
-
1. A drive device comprising:
-
a housing in which a gas is sealed, wherein density of the gas is lower than density of air; a driven object housed inside the housing; a driver configured to drive the driven object; a current detector configured to detect a value of a current flowing into the driver while the driven object is driven by the driver; and a determinator configured to determine a concentration of the gas inside the housing based on the value of the current detected. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A projection-type image display device comprising:
-
a housing in which a gas is sealed, wherein density of the gas is lower than density of air; a phosphor wheel housed inside the housing; a driver configured to rotate the phosphor wheel; a current detector configured to detect a value of a current flowing into the driver while the phosphor wheel is rotated by the driver; and a determinator configured to determine a concentration of the gas inside the housing based on the value of the current detected. - View Dependent Claims (8, 9)
-
Specification