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US 2010/0302477 A1Published application
Optical element, illumination device and display device
AssigneeSony Corporation
InventorsMotosuke Ohmi, Hiromasa Suzuki, Kanji Yokomizo
Life of this patent
Estimating the term…
Abstract
An optical element for an illumination device, an illumination device, and a display device using the illumination device is capable of performing surface light emission by utilizing a plurality of light guide members, and suppressing generation of color unevenness.
Claims26
An optical element for an illumination device, the optical element comprising:
- a light shielding layer having a degree of transmittance;
- and
- a color sheet provided on the light shielding layer and having a color that is complimentary to a color of light emitted from a light source,
- wherein the color of the light source varies from white light, and the color sheet alters the color of light emitted from the light source to reduce a difference between the color of the light source and white light as light is transmitted through the color sheet and the light shielding layer.
1 more element
An illumination device comprising:
- a light guide plate;
- an optical element including a complimentary color sheet, and a light shielding layer provided on the complimentary color sheet;
- and
- a light source emitting a first light component into the light guide plate and emitting a second light component into the optical element, the second light component having a different color than the first light component,
- wherein the complimentary color sheet has a color that is complimentary to the color of the second light component, and
- wherein the complimentary color sheet alters the color of the second light component so that light transmitted through the complimentary color sheet and the light shielding layer is emitted therefrom with a color that is substantially similar to the color of the first light component that is emitted from the light guide plate.
3 more elements
A display device comprising:
- a liquid crystal panel;
- and
- an illumination device configured to illuminate the liquid crystal panel, the illumination device including
- an array of light guide plates,
- a plurality of light sources arranged at one or more edges of each of the light guide plates, and
- optical elements positioned above at least a portion of the light sources, at least one optical element including a complimentary color sheet, and a light shielding layer provided on the complimentary color sheet,
- wherein at least one light source emits a first light component into the respective light guide plate and emits a second light component into the respective optical element, the second light component varies from white light and has a different color than the first light component,
- wherein the complimentary color sheets have a color that is complimentary to the color of the second light component, and
- wherein at least one complimentary color sheet alters the color of the second light component to reduce a difference between the color of the second light component and white light as the second light component is transmitted through the complimentary color sheet and the light shielding layer.
6 more elements
Dependencies are inferred from the claim text.