Illumination device, image display device, and projector
First Claim
1. An illumination device, comprising:
- a light source to emit an illumination light;
a color separation optical system to separate the illumination light into illumination lights of at least two colors;
a variable diaphragm disposed in the optical path of each of the at least two colors of the separated illumination light to control the quantity of the separated illumination light for each of the at least two colors the quantity of light being controlled with respect to a specific wavelength region contained in the illumination light; and
an illumination light scanning device to scan the illumination light that passed through each variable diaphragm over an irradiated surface, the axis of the direction in which the illumination light is scanned over the irradiated surface almost coinciding with the axis of the direction in which each variable diaphragm controls the illumination light.
1 Assignment
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Accused Products
Abstract
An illumination device to increase or decrease a quantity of light, while maintaining a uniform illumination intensity distribution, an image display device that displays high-quality images with a wide dynamic range, and a projector are provided. The illumination device includes a light source including a lamp and a concave mirror and emitting an illumination light, a variable diaphragm, for example in the form of a shutter having a linear edge and controlling the quantity of the illumination light, and a rotary prism which is an illumination light scanning device to scan the illumination light that passed through the variable diaphragm over an irradiated surface. The axis of the direction in which the illumination light is scanned over the irradiated surface almost coincides with the axis of the direction in which the variable diaphragm controls the illumination light. Here, the control modes in the +x axis direction, −x axis direction and ±x axis direction are used to match the axis.
24 Citations
9 Claims
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1. An illumination device, comprising:
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a light source to emit an illumination light; a color separation optical system to separate the illumination light into illumination lights of at least two colors; a variable diaphragm disposed in the optical path of each of the at least two colors of the separated illumination light to control the quantity of the separated illumination light for each of the at least two colors the quantity of light being controlled with respect to a specific wavelength region contained in the illumination light; and an illumination light scanning device to scan the illumination light that passed through each variable diaphragm over an irradiated surface, the axis of the direction in which the illumination light is scanned over the irradiated surface almost coinciding with the axis of the direction in which each variable diaphragm controls the illumination light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification