Light emission reducing compounds for electronic devices
First Claim
Patent Images
1. A light-filtering film for a screen of a device comprising:
- a polymer substrate;
a first absorbing compound combined with the polymer substrate, the first absorbing compound absorbing blue light in a blue notch band having a full-width half-maximum of not greater than about 50 nm; and
a second absorbing compound combined with the polymer substrate, the second absorbing compound absorbing red light in a red notch band having a full-width half-maximum of not greater than about 50 nm,wherein the first absorbing compound and the second absorbing compound are provided in combination so that, for light produced by the screen transmitted through the light-filtering film, correlated color temperature is within about 1000 Kelvin of correlated color temperature for light produced by the screen that is not transmitted through the light-filtering film, andwherein the first absorbing compound absorbs in a wavelength range from about 260 nm to about 400 nm, and the second absorbing compound absorbs in a wavelength range of from about 800 nm to about 1200 nm.
3 Assignments
0 Petitions
Accused Products
Abstract
Double-notch filters for electronic devices are provided that filter light from both the blue spectrum as well as the red spectrum in narrow wavelength bands, or “notches.” A double-notch filter can, using input light from a conventional LED-backlit LCD display, output light that can be measured as substantially satisfying criteria for a D65 white point. In some examples, a double-notch filter can output light that can be measured as nearly satisfying criteria for a D65 white point, to within +/−500 Kelvin. In some examples, a double-notch filter can output light that can be measured as nearly satisfying criteria for a D65 white point, to within +/−1000 Kelvin.
-
Citations
24 Claims
-
1. A light-filtering film for a screen of a device comprising:
-
a polymer substrate; a first absorbing compound combined with the polymer substrate, the first absorbing compound absorbing blue light in a blue notch band having a full-width half-maximum of not greater than about 50 nm; and a second absorbing compound combined with the polymer substrate, the second absorbing compound absorbing red light in a red notch band having a full-width half-maximum of not greater than about 50 nm, wherein the first absorbing compound and the second absorbing compound are provided in combination so that, for light produced by the screen transmitted through the light-filtering film, correlated color temperature is within about 1000 Kelvin of correlated color temperature for light produced by the screen that is not transmitted through the light-filtering film, and wherein the first absorbing compound absorbs in a wavelength range from about 260 nm to about 400 nm, and the second absorbing compound absorbs in a wavelength range of from about 800 nm to about 1200 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method of making a light-filtering film comprising:
-
providing a screen for an electronic device; impregnating at least one of a first absorbing compound combined with a polymer substrate, the first absorbing compound absorbing blue light in a blue notch band having a full-width half-maximum of not greater than about 50 nm, or a second absorbing compound combined with the polymer substrate, the second absorbing compound absorbing red light in a red notch band having a full-width half-maximum of not greater than about 50 nm, wherein the first absorbing compound and the second absorbing compound are provided in combination so that, for light produced by the screen transmitted through the light-filtering film, correlated color temperature is within about 1000 Kelvin of correlated color temperature for light produced by the screen that is not transmitted through the light-filtering film, and wherein the first absorbing compound absorbs in a wavelength range of from about 260 nm to about 400 nm, and the second absorbing compound absorbs in a wavelength range of from about 800 nm to about 1200 nm. - View Dependent Claims (17, 18, 19)
-
-
20. A method of making a light-filtering film comprising:
-
providing a screen of an electronic display device; providing a polymer substrate, wherein the polymer substrate comprises; a first absorbing compound combined with the polymer substrate, the first absorbing compound absorbing blue light in a blue notch band having a full-width half-maximum of not greater than about 50 nm; and a second absorbing compound combined with the polymer substrate, the second absorbing compound absorbing red light in a red notch band having a full-width half-maximum of not greater than about 50 nm, wherein the first absorbing compound and the second absorbing compound are provided in combination so that, for light produced by the screen transmitted through the light-filtering film, correlated color temperature is within about 1000 Kelvin of correlated color temperature for light produced by the screen that is not transmitted through the light-filtering film; and applying the light-filtering film to the screen, wherein the first absorbing compound absorbs in a wavelength range of from about 260 nm to about 400 nm, and the second absorbing compound absorbs in a wavelength range of from about 800 nm to about 1200 nm. - View Dependent Claims (21)
-
-
22. A light-filtering film for a screen of a device comprising:
-
a polymer substrate; a first absorbing compound combined with the polymer substrate, the first absorbing compound absorbing blue light in a blue notch band having a full-width half-maximum of not greater than about 50 nm; and a second absorbing compound combined with the polymer substrate, the second absorbing compound absorbing red light in a red notch band having a full-width half-maximum of not greater than about 50 nm, wherein the first absorbing compound and the second absorbing compound are provided in combination so that, for light produced by the screen transmitted through the light-filtering film, correlated color temperature is within about 1000 Kelvin of correlated color temperature for light produced by the screen that is not transmitted through the light-filtering film, and wherein the first absorbing compound absorbs in a wavelength range from about 420 nm to about 445 nm, and the second absorbing compound absorbs in a wavelength range of from about 630 nm to about 685 nm. - View Dependent Claims (23, 24)
-
Specification