Control apparatus for optical density changing element
First Claim
Patent Images
1. A control apparatus for an optical density changing element that is used under the condition of EV=8.4 or higher comprising:
- an electromotive force generating element comprising an electromagnetic wave sensor and a voltage source, wherein the electromotive force generating element generates an electromotive force;
an optical density changing element that has a change in optical density at a light amount in which EV has a value of 8.4 or higher including an electrochromic material driven by the electromotive force; and
a resistor connected in parallel to the optical density changing element;
wherein the optical density changing element consists of a pair of an anode and a cathode; and
includes at least two different electrochromic materials that change optical densities at different wavelengths between the pair of the anode and the cathode.
2 Assignments
0 Petitions
Accused Products
Abstract
A control apparatus for an optical density changing element comprising: an electromotive force generating element comprising an electromagnetic wave sensor (example: phototransistor) and a voltage source (example: battery), wherein the electromotive force generating element generates an electromotive force; an optical density changing element (light regulating filter) including an electrochromic material driven by the electromotive force; and a resistor connected in parallel to the optical density changing element.
10 Citations
15 Claims
-
1. A control apparatus for an optical density changing element that is used under the condition of EV=8.4 or higher comprising:
-
an electromotive force generating element comprising an electromagnetic wave sensor and a voltage source, wherein the electromotive force generating element generates an electromotive force; an optical density changing element that has a change in optical density at a light amount in which EV has a value of 8.4 or higher including an electrochromic material driven by the electromotive force; and a resistor connected in parallel to the optical density changing element; wherein the optical density changing element consists of a pair of an anode and a cathode; and
includes at least two different electrochromic materials that change optical densities at different wavelengths between the pair of the anode and the cathode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for regulating the amount of light that is transmitted through a filter, comprising:
-
subjecting a control apparatus for an optical density changing element to a light condition of EV=8.4 or higher, wherein the control apparatus for the optical density changing element comprises; an electromotive force generating element comprising an electromagnetic wave sensor and a voltage source, wherein the electromotive force generating element generates an electromotive force; an optical density changing element including an electrochromic material driven by the electromotive force; and a resistor connected in parallel to the optical density changing element; wherein the optical density changing element consists of a pair of an anode and a cathode; and
includes at least two different electrochromic materials that change optical densities at different wavelengths between the pair of the anode and the cathode, to thereby regulate the amount of light that is transmitted through the optical density changing element. - View Dependent Claims (12, 13, 14, 15)
-
Specification