Back to results
US 9,436,020 B2Granted
Luminance adjustment film and illuminating device including photothermal conversion material
AssigneeEmpire Technology Development LLC
InventorMasahiro Ueda
Life of this patent
Estimating the term…
Abstract
Luminance adjustment films that include a photothermal conversion material which converts infrared light to heat wherein an intensity distribution of the infrared light reflects a luminance distribution of visible light; and at least one microcapsule containing a compound which selectively decreases luminance of the visible light in reaction to the heat are described.
Claims27
An illuminating device comprising:
- a visible light source configured to emit visible light;
- an infrared light source configured to emit infrared light having an intensity distribution which is proportionally related to a luminance distribution of the visible light;
- and
- a luminance adjustment film including a photothermal conversion material which converts the infrared light to heat and at least one microcapsule containing a compound which selectively decreases luminance of the visible light in reaction to the heat.
1 more element
A method of manufacturing an illuminating device, the method comprising:
- providing a visible light source configured to emit visible light;
- providing an infrared light source configured to emit infrared light having an intensity distribution which reflects a luminance distribution of the visible light;
- providing a photothermal conversion material which converts the infrared light to heat;
- providing at least one microcapsule containing a compound which selectively decreases luminance of the visible light in reaction to the heat;
- combining the at least one microcapsule with the photothermal conversion material to produce a luminance adjustment film;
- and
- combining the luminance adjustment film with the visible light source and the infrared light source to produce the illuminating device.
4 more elements
A method of adjusting luminance, the method comprising:
- emitting visible light from a visible light source;
- emitting infrared light from an infrared light source, the infrared light having an intensity distribution which reflects a luminance distribution of the visible light;
- converting the infrared light to heat by using a photothermal conversion material;
- and
- selectively decreasing luminance of the visible light in reaction to the heat by providing at least one microcapsule containing a compound having a cloud point.
2 more elements
Dependencies are inferred from the claim text.