Projection Device
First Claim
1. A projection device, comprising:
- a light source part;
a scan part for scanning a projection plane with light emitted from the light source part;
a light source control part for driving the light source part in accordance with an image signal;
a scan control part for driving the scan part; and
a remaining battery level determination part for determining a remaining level of a battery as a power source, whereinwhen the remaining battery level determination part determines that the remaining level of the battery has lowered to a first predetermined level, the light source control part and the scan control part control driving of the light source part and the scan part so as to reduce a size of a screen projected onto the projection plane.
1 Assignment
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Accused Products
Abstract
[Object]To provide a scan-type projection device that can lengthen a projecting time during a battery-powered operation.
[Constitution] If a battery 600 is sufficiently charged, an actuator control part 120 drives a movable mirror 43 so as to form a normal turning angle, and an image signal processing part 130 drives a light source part 41 so as to irradiate laser lights with predetermined gradations to one pixel region for a normal irradiation time t1. Accordingly, an image with a normal screen size is displayed on a projection plane. Meanwhile, if the battery becomes low in remaining level, the actuator control part 120 drive the movable mirror 43 so as to form a small turning angle, and the image signal processing part 130 drives the light source part 41 so as to irradiate laser lights with predetermined gradations to one pixel region for a short irradiation time t2. Accordingly, an image with a reduced screen size is displayed on a projection plane.
29 Citations
8 Claims
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1. A projection device, comprising:
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a light source part; a scan part for scanning a projection plane with light emitted from the light source part; a light source control part for driving the light source part in accordance with an image signal; a scan control part for driving the scan part; and a remaining battery level determination part for determining a remaining level of a battery as a power source, wherein when the remaining battery level determination part determines that the remaining level of the battery has lowered to a first predetermined level, the light source control part and the scan control part control driving of the light source part and the scan part so as to reduce a size of a screen projected onto the projection plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification