Illumination device and display unit
AssigneeSony Corporation
InventorKoji Miura
Life of this patent
Estimating the term…
Abstract
A first illumination device includes a light source that emits light having directivity, and a uniform illumination optical system including a first fly-eye lens that includes a plurality of lenses two-dimensionally arranged and allows light based on emitted light from the light source to pass through the first fly-eye lens. An illumination target region has a planar shape having a side extending along a direction substantially parallel to a long-axis direction or a short-axis direction of an intensity distribution shape of emitted light from the light source, and a periodic direction of an array of the lenses in the first fly-eye lens is inclined with respect to the long-axis direction or the short-axis direction.
Claims14
An illumination device, comprising:
- a light source;
- and
- an optical system configured to include one fly-eye lens that includes a plurality of lenses, wherein
- a first reference direction in a planar shape of an illumination target region extends along a direction substantially parallel to a long-axis direction or a short-axis direction of an intensity distribution shape of the light entering the one fly-eye lens,
- the intensity distribution shape of the light entering the one fly-eye lens is elongated in the long-axis direction,
- a periodic direction of an array of the lenses in the one fly-eye lens is inclined with respect to the long-axis direction or the short-axis direction, wherein the one fly-eye lens has an outer shape reference linearly extending along one direction in a portion of its outer edge,
- the plurality of lenses in the one fly-eye lens each have a regular hexagonal planar shape in a plane where the lenses are disposed, and are arranged in a honeycomb pattern as a whole,
- the periodic direction of the hexagonal shape lenses in the honeycomb pattern is inclined with respect to the long-axis direction or the short-axis direction without shifting of the hexagonal shape lenses in the honeycomb pattern, and
- an inclination angle between a periodic direction of the lenses in the one fly-eye lens and the long-axis direction or the short-axis direction is greater than 0 degrees and smaller than 30 degrees.
A display device comprising:
- an illumination optical system;
- a light valve;
- and
- a projection lens,
- wherein the illumination optical system includes
- a light source,
- an optical system including one fly-eye lens that includes a plurality of lenses, wherein
- a first reference direction in a planar shape of an illumination target region extends along a direction substantially parallel to a long-axis direction or a short-axis direction of an intensity distribution shape of the light entering the one fly-eye lens,
- the intensity distribution shape of the light entering the one fly-eye lens is elongated in the long-axis direction,
- a periodic direction of an array of the lenses in the one fly-eye lens is inclined with respect to the long-axis direction or the short-axis direction,
- the plurality of lenses in the one fly-eye lens each have a regular hexagonal planar shape in a plane where the lenses are disposed, and are arranged in a honeycomb pattern as a whole,
- the periodic direction of the hexagonal shape lenses in the honeycomb pattern is inclined with respect to the long-axis direction or the short-axis direction without shifting of the hexagonal shape lenses in the honeycomb pattern, and
- an inclination angle between a periodic direction of the lenses in the one fly-eye lens and the long-axis direction or the short-axis direction is greater than 0 degrees and smaller than 30 degrees.
Dependencies are inferred from the claim text.