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US 6,283,599 B1Granted
Projector with adjustable brightness and uniformity
AssigneeAcer Peripherals, Inc.
InventorRung-De Lin
Life of this patent
Estimating the term…
Abstract
A projection display device includes a lens module, a light source and an adjusting device. The lens module has a first lens and a second lens. The light source emits light through the first lens and the second lens to a surface. The adjusting device is used to change the distance between the first lens and the second lens, thereby adjusting brightness and uniformity of the projected pictures on the surface.
Claims26
A projection display device, including:
- a lens module having a first lens and a second lens, wherein at least the first lens or the second lens is movably disposed;
- a light source emitting a light beam;
- a surface for receiving light from the light source through the lens module;
- and
- an adjusting device for adjusting a distance between the first and second lenses, wherein increasing the distance between the first and second lenses increases the uniformity of brightness but decreases the brightness of the light received by the surface, while decreasing the distance between the first and second lenses decreases the uniformity of brightness but increases the brightness of light received by the surface.
2 more elements
A projection display device, including:
- a color wheel;
- a lens module having a first lens and a second lens, wherein at least the first lens or the second lens is movably disposed;
- a digital micromirror device;
- a light source for emitting a light beam through the color wheel and the lens module to the digital micromirror device;
- and
- an adjusting device for adjusting a distance between the first and second lenses, wherein increasing the distance between the first and second lenses increases the uniformity of brightness but decreases the brightness of the light received by the digital micromirror device, while decreasing the distance between the first and second lenses decreases the uniformity of brightness but increases the brightness of light received by the digital micromirror device.
3 more elements
A projection display device having adjustable brightness and uniformity of brightness, including:
- a lens module having a first lens and a second lens, wherein at least the first lens or the second lens is movably disposed;
- a liquid crystal display panel;
- a light source for emitting a light beam through the first and second lenses of the lens module to the liquid crystal display panel;
- and
- an adjusting device for adjusting a distance between the first and second lenses, wherein increasing the distance between the first and second lenses increases the uniformity of brightness but decreases the brightness of the light received by the liquid crystal display panel, while decreasing the distance between the first and second lenses decreases the uniformity of brightness but increases the brightness of light received by the liquid crystal display panel.
2 more elements
Dependencies are inferred from the claim text.