Emitting film with improved light-out coupling
First Claim
1. An optically active structure, comprising a light emitting layer defined by a common matrix, wherein the common matrix has embedded therein a plurality of optically active semiconductor nanoparticles configured to emit light of one or more predetermined wavelength range in response to pumping energy, and a plurality of light scattering elements;
- wherein each of said plurality of light scattering elements is formed by an optically transparent void region surrounding a filler particle, said filler particles also embedding some of the optically active semiconductor nanoparticles therewithin;
such that each of the light scattering elements scatters light originated by emission of the optically active semiconductor nanoparticles surrounded by the respective void regions.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides an optically active structure and the use thereof in a backlight unit. The optically active structure comprises a plurality of optically active particles configured to emit light of one or more predetermined wavelength range in response to pumping energy, and a plurality of light scattering elements. The plurality of light scattering elements comprises optically transparent void regions, such as void regions surrounding filler particles.
-
Citations
25 Claims
-
1. An optically active structure, comprising a light emitting layer defined by a common matrix, wherein the common matrix has embedded therein a plurality of optically active semiconductor nanoparticles configured to emit light of one or more predetermined wavelength range in response to pumping energy, and a plurality of light scattering elements;
- wherein each of said plurality of light scattering elements is formed by an optically transparent void region surrounding a filler particle, said filler particles also embedding some of the optically active semiconductor nanoparticles therewithin;
such that each of the light scattering elements scatters light originated by emission of the optically active semiconductor nanoparticles surrounded by the respective void regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- wherein each of said plurality of light scattering elements is formed by an optically transparent void region surrounding a filler particle, said filler particles also embedding some of the optically active semiconductor nanoparticles therewithin;
-
23. A backlight unit configured for use in a display device, wherein the backlight unit comprises an optically active film formed by a common matrix, wherein the common matrix comprises optically active semiconductor nanoparticles configured to emit light of one or more predetermined wavelength range in response to pumping energy, and a plurality of light scattering elements formed by optically transparent material filler particles surrounded with a void region;
- wherein said optically active semiconductor nanoparticles comprise optically active semiconductor nanoparticles embedded within said common matrix and optically active semiconductor nanoparticles embedded in said filler particles.
- View Dependent Claims (24, 25)
Specification