Back to results
US 11,694,649 B2Granted
Method for changing states of electrochromic film
AssigneeFurcifer Inc.
InventorsJian Wang, Yan Zhou
Life of this patent
Estimating the term…
Abstract
The disclosure relates generally to a method of changing an optical state of an electrochromic film. The electrochromic film may have a plurality of optical states. The method may include selecting a desired state of the plurality of optical states; injecting electric charges into the electrochromic film; monitoring an amount of the electric charges injected into the electrochromic film; and stopping injecting the electric charges when the electric charges reaches a pre-set amount corresponding to the desired state.
Claims20
An electrochromic device, comprising:
- two layers of glass;
- an electrochromic film disposed between the two layers of glass;
- a sensor;
- and
- a controller coupled to the electrochromic film and the sensor, wherein:
- the sensor is configured to:
- detect a transmittance or spectrum of the electrochromic film, and
- send a signal of the detected transmittance or spectrum to the controller;
- and
- the controller is configured to:
- determine a color of the electrochromic film at least based on the signal, and
- inject an amount of electric charges into the electrochromic film or remove an amount of electric charges from the electrochromic film based on the determined color.
9 more elements
An electrochromic device, comprising:
- two layers of glass;
- an electrochromic film disposed between the two layers of glass;
- a solar cell;
- and
- a controller coupled to the electrochromic film and the solar cell, wherein:
- the solar cell is configured to:
- simultaneously supply energy to the controller and detect a light intensity of external light based on an amount of current generated by the solar cell, and
- transmit a signal or information of the light intensity to the controller;
- and
- the controller is configured to adjust a level of transmission, a transmission state, or a color of the electrochromic film based on the light intensity or a change in the light intensity.
7 more elements
A method, comprising:
- detecting, by a sensor of an electrochromic device, a transmittance or spectrum of an electrochromic film of the electrochromic device, wherein the electrochromic film is disposed between two layers of glass of the electrochromic device, wherein the spectrum comprises a spectrum of light that is transmitted through the electrochromic film or that is reflected from the electrochromic film;
- sending, by the sensor, a signal of the detected transmittance or spectrum to a controller of the electrochromic device, wherein the controller is coupled to the electrochromic film and the sensor;
- determining, by the controller, a color of the electrochromic film at least based on the signal;
- and
- injecting, by the controller, an amount of electric charges into the electrochromic film or removing, by the controller, an amount of electric charges from the electrochromic film based on the determined color.
2 more elements
Dependencies are inferred from the claim text.