Luminance adjustment film and illuminating device including photothermal conversion material
AssigneeEmpire Technology Development LLC
InventorMasahiro Ueda
Life of this patent
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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.
Claims29
A luminance adjustment film comprising:
- 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.
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 reflects 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.
A method of manufacturing a luminance adjustment film, the method comprising:
- providing 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;
- providing at least one microcapsule containing a compound which selectively decreases luminance of the visible light in reaction to the heat;
- and
- combining the at least one microcapsule with the photothermal conversion material so as to produce the luminance adjustment film.
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.
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 using a compound having a cloud point.
Dependencies are inferred from the claim text.