Color filter enhancements for display devices
A display system comprising a backlight device having a light emitting array, a liquid crystal panel, and a color filter having one or more absorbing dyes and, optionally, one or more dye enhancement compounds, wherein the one or more absorbing dyes and the one or more dye enhancement compounds are located in at least one color set of subpixels in the color filter. The one or more absorbing dyes may be a soluble, blue light, green light, or red light absorbing dye included in blue, green, or red subpixels of the color filter. A blue light absorbing dye may reduce transmission in a wavelength range of 410-430 nm, a green light absorbing dye may reduce transmission in a wavelength range of 490-570 nm, and a red light absorbing dye may reduce transmission of wavelengths less than 620 nm.
1. A display system comprising:
a backlight unit having a light emitting array;
a liquid crystal panel; and
a color filter having one or more light absorbing materials, wherein
the one or more light absorbing materials are one or more light absorbing dyes,
the one or more light absorbing dyes comprise a soluble, primary light absorbing dye,
the soluble, primary light absorbing dye has only absorption properties and absorbs light in a particular wavelength range,
the color filter is comprised of a plurality of pixels,
each pixel is comprised of red, green, and blue subpixels,
the subpixels are created from a resin and a colorant such that the red subpixels have a red colorant, the green subpixels have a green colorant, and the blue subpixels have a blue colorant,
the colorants are suspended in the resin of the subpixels,
the soluble, primary light absorbing dye is dissolved in the resin of at least one color set of the red, green, and blue subpixels,
the soluble, primary light absorbing dye is a separate compound than the colorants, and
the one or more light absorbing dyes are located within the resin of at least one color set of the red, green, and blue subpixels in the color filter.
2. The display system of claim 1 , further comprising light emitting diodes incorporated into the light emitting array, a reflector adjacent to the light emitting array, a diffuser opposite the reflector, a thin film transistor array layer, and a layer of cover glass.
3. The display system of claim 1 , wherein the liquid crystal panel is adjacent to the color filter and is comprised of a liquid crystal layer disposed between two panel plates.
4. The display system of claim 1 , further comprising a first brightness enhancing layer and at least one polarizer, wherein
a first polarizer is located adjacent the color filter,
a second brightness enhancing layer is adjacent to the first brightness enhancing layer, and
a second polarizer is located next to the backlight unit.
5. The display system of claim 1 , the color filter further comprising one or more dye enhancement compounds located within the resin of at least one color set of the red, green, and blue subpixels in the color filter, wherein the one or more dye enhancement compounds are at least one of a photoinitiator, a polymerization initiation aid, a monomer, and a stabilizer.
6. The display system of claim 1 , the color filter further comprising one or more dye enhancement compounds located within the resin of at least one color set of the red, green, and blue subpixels in the color filter, wherein the one or more dye enhancement compounds are antioxidants.
7. The display system of claim 1 , wherein the soluble, primary light absorbing dye is included in blue subpixels of the color filter.
8. The display system of claim 7 , the one or more absorbing dyes further comprising a soluble, secondary light absorbing dye that only has absorption properties and that absorbs light at wavelengths below 415 nm.
9. The display system of claim 7 , the one or more absorbing dyes further comprising a soluble, secondary light absorbing dye that only has absorption properties and that absorbs light at wavelengths above 480 nm.
10. The display system of claim 7 , wherein the soluble, primary light absorbing dye reduces blue light toxicity factor by up to 20%.
11. The display system of claim 1 , wherein the soluble, primary light absorbing dye is included in green subpixels of the color filter.
12. The display system of claim 11 , the one or more absorbing dyes further comprising a first, soluble, secondary light absorbing dye that only has absorption properties and that absorbs light at wavelengths below 500 nm or a second, soluble, secondary light absorbing dye that only has absorption properties and that absorbs light at wavelengths above 575 nm.
13. The display system of claim 1 , wherein the soluble, primary light absorbing dye is included in red subpixels of the color filter.
14. The display system of claim 13 , the one or more absorbing dyes further comprising a soluble, secondary light absorbing dye that only has absorption properties and that absorbs light at wavelengths below 590 nm.
15. The display system of claim 1 , the one or more absorbing dyes further comprising a second, soluble, primary light absorbing dye that only has absorption properties, wherein
the first, soluble, primary light absorbing dye absorbs in the wavelength range 410-430 nm, and
the second, soluble, primary light absorbing dye absorbs in the wavelength range of 470-495 nm.
16. The display system of claim 1 , wherein the one or more absorbing dyes are at least one of organic dyes, metal complex dyes, porphyrin-based compounds, coumarins, retinal pigments, and phthalocyanine compounds.
17. The display system of claim 1 , wherein there is a reduction in luminance of no more than 10% compared to a display system without the one or more absorbing dyes.
18. The display system of claim 1 , wherein there is a change in color gamut of no more than 5%.
19. The display system of claim 1 , wherein the one or more absorbing dyes combined with the one or more dye enhancement compounds are heat resistant and resist color gamut coordinate changes more than 0.005 along the X-axis and 0.005 along the Y-axis after being exposed to temperatures of at least 200 degrees Celsius for at least 30 minutes.
20. The display system of claim 1 , wherein
the soluble, primary light absorbing dye is a first soluble, primary light absorbing dye,
the one or more light absorbing dyes further comprise a second and a third soluble, primary light absorbing dye,
the first soluble, primary light absorbing dye is a blue-light absorbing dye located within the resin of blue subpixels of the color filter,
the second soluble, primary light absorbing dye is a green-light absorbing dye located within the resin of green subpixels of the color filter, and
the third soluble, primary light absorbing dye is a red-light absorbing dye located within the resin of red subpixels of the color filter.
21. The display system of claim 1 , wherein
the one or more light absorbing dyes further comprise a soluble, secondary light absorbing dye, and
the soluble, secondary light absorbing dye is located within the resin of the at least one color set of the red, green, and blue subpixels in the color filter such that the primary light absorbing dye and the secondary light absorbing dye are located within the same color set of subpixels.
22. The display system of claim 7 , the one or more absorbing dyes further comprising a first, soluble, secondary light absorbing dye that absorbs light at wavelengths below 415 nm, and a second, soluble, secondary light absorbing dye that absorbs light at wavelengths above 480 nm.
23. The display system of claim 7 , wherein
the soluble, primary light absorbing dye is a blue dye,
the blue dye is dissolved in the resin of the blue subpixels, and
the blue dye only impacts transmission in between 412 and 460.
24. The display system of claim 12 , wherein the one or more absorbing dyes further comprise the first, soluble, secondary light absorbing dye that absorbs light at wavelengths below 500 nm and the second, soluble, secondary light absorbing dye that absorbs light at wavelengths above 575 nm.
25. The display system of claim 11 , wherein
the soluble, primary light absorbing dye is a green dye,
the green dye is dissolved in the resin of the green subpixels, and
the green dye only impacts transmission in between 490 and 610.
26. The display system of claim 13 , wherein
the soluble, primary light absorbing dye is a red dye,
the red dye is dissolved in the resin of the red subpixels, and
the red dye only impacts transmission in between 570 and 670.
27. A display system comprising:
a backlight unit having a light emitting array; and
a color filter having one or more light absorbing materials, wherein
the one or more light absorbing materials are one or more light absorbing dyes,
the one or more light absorbing dyes comprise a soluble, primary light absorbing dye and a soluble, secondary light absorbing dye,
the soluble, primary light absorbing dye and the soluble, secondary light absorbing dye only have absorption properties and absorb light in a predetermined wavelength range,
the color filter is comprised of a plurality of pixels,
each pixel is comprised of red, green, and blue subpixels,
the subpixels are created from a resin and a colorant such that the red subpixels have a red colorant, the green subpixels have a green colorant, and the blue subpixels have a blue colorant,
the colorants are suspended in the resin of the subpixels,
the soluble, primary light absorbing dye and the soluble, secondary light absorbing dye are dissolved in the resin of at least one color set of the red, green, and blue subpixels,
the soluble, primary light absorbing dye and the soluble, secondary light absorbing dye are separate compounds than the colorants, and
the one or more light absorbing dyes are located within the resin of at least one color set of the red, green, and blue subpixels in the color filter.