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US 6,084,702 AGranted
Thermochromic devices
AssigneePleotint, L.L.C.
InventorsHarlan J. Byker, Paul H. Ogburn
Life of this patent
Estimating the term…
Abstract
The invention is an energy efficient, thermochromic device for windows that allows sunlight or solar radiation into a building or structure when the ambient temperature is low and substantially blocks solar radiation when the ambient temperature is high, especially when sunlight is directly on the window. Additionally, the invention is a thermochromic device useful as variable transmission shutters for use in lenses or filters.
Claims81
A thermochromic device comprising:
- a light transmitting substrate;
- at least one thermochromic material which changes reversibly from less light energy absorbing to more light energy absorbing as its temperature increases;
- and
- at least one material with residual light energy absorbing character;
- wherein the thermochromic material is present in the substrate or on a layer carried on the substrate and the material with residual light energy absorbing character may be the same or different than the thermochromic material and may be present in the same layer or in a different layer than the thermochromic material.
2 more elements
A thermochromic device comprising:
- a light transmitting substrate;
- at least one thermochromic material capable of reversibly increasing in light absorption as the temperature of the thermochromic material increases;
- and
- at least one material capable of absorbing incident sunlight and causing a temperature increase in the thermochromic material when the device is exposed to sunlight wherein the thermochromic material is present in the substrate or on a layer carried on the substrate and the material capable of absorbing incident sunlight and causing a temperature increase in the thermochromic material may be the same or different than the thermochromic material and may be present in the same layer or in a different layer than the thermochromic material.
1 more element
A thermochromic window comprising:
- a first light transmitting substrate;
- a second light transmitting substrate;
- at least one thermochromic material which changes reversibly from less light energy absorbing to more light energy absorbing as its temperature increases;
- and
- at least one material with residual light energy absorbing character;
- wherein the thermochromic material is present in the first substrate or on a layer carried on the first substrate and the material with residual light energy absorbing character may be the same or different than the thermochromic material and may be present in the same layer or in a different layer than the thermochromic material.
3 more elements
A thermochromic window comprising:
- a first light transmitting substrate;
- a second light transmitting substrate;
- at least one thermochromic material capable of reversibly increasing in light absorption as the temperature of the thermochromic material increases;
- and
- at least one material capable of absorbing incident sunlight and causing a temperature increase in the thermochromic materials present when the device is exposed to sunlight;
- wherein the thermochromic material is present in the first substrate or on a layer carried on the first substrate and the material capable of absorbing incident sunlight and causing a temperature increase in the thermochromic material may be the same or different than the thermochromic material and may be present in the same layer or in a different layer than the thermochromic material.
3 more elements
Dependencies are inferred from the claim text.