High brightness wide gamut display
View Patent ↗A device to produce a color image, the device including a color filtering arrangement to produce a plurality of primary colors, each primary color having a spectral range, wherein the spectral ranges of at least two of the primary colors overlap significantly.
1. A display device to produce a color image, the device comprising a color filtering mechanism to sequentially produce light of at least four non-white colors by transmission through at least four non-white color filters respectively, each color filter having a spectral range of transmission in which substantially all light having a wavelength within said spectral range is transmitted, wherein the spectral range of at least a first of said non-white color filters overlaps the spectral range of at least a second of said non-white color filters by at least 30 nanometers.
2. The device of claim 1 , wherein said color filtering mechanism comprises a plurality of filter segments on a color wheel.
3. The device of claim 1 , further comprising a light source.
4. The device of claim 1 , further comprising a spatial light modulator to produce said color image by modulating light filtered by said color filtering mechanism.
5. The display device of claim 1 , wherein said at least four color filters comprise a blue color filter having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.
6. The display device of claim 1 , wherein said at least four color filters comprise at least five color filters.
7. The display device of claim 6 , wherein said at least five color filters comprise a blue color filter having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a cyan color filter having a spectral range from between 400 nm and 460 nm to between 500 nm and 560 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.
8. The display device of claim 1 , wherein said at least four color filters comprise at least six color filters.
9. The display device of claim 8 , wherein said at least six color filters have spectral ranges of approximately 400-500 nm, approximately 500-550 nm, approximately 575-750 nm, approximately 450-520 nm, approximately 520-620 nm, and approximately 620-750 nm, respectively.
10. A method of producing a color image, the method comprising sequentially transmitting light of at least four non-white colors corresponding to said color image through at least four non-white color filters respectively, each color filter having a spectral range of transmission in which substantially all light having a wavelength within said spectral range is transmitted, wherein the spectral range of at least a first of said non-white color filters overlaps the spectral range of at least a second of said non-white color filters by at least 30 nanometers.
11. The method of claim 10 , wherein sequentially transmitting light of said colors comprises sequentially filtering light of an illumination unit.
12. The method of claim 10 , wherein said at least four color filters comprise a blue color filter having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.
13. The method of claim 10 , wherein said at least four color filters comprise at least five color filters.
14. The method of claim 13 , wherein said at least five color filters comprise a blue color filter having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a cyan color filter having a spectral range from between 400 nm and 460 nm to between 500 nm and 560 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.
15. The method of claim 13 , wherein said at least five color filters comprise at least six color filters.
16. The method of claim 15 , wherein said at least six color filters have spectral ranges of approximately 400-500 nm, approximately 500-550 nm, approximately 575-750 nm, approximately 450-520 nm, approximately 520-620 nm, and approximately 620-750 nm, respectively.