Method of manufacturing color-converting filter
View Patent ↗A simplified method of manufacturing a color-converting filter is disclosed which permits highly detailed patterning. Color filter layers are formed on a transparent substrate, a colorant layer containing a color-converting colorant is formed on the color filter layers, and the colorant layer is exposed via the transparent substrate and the color filter layers using colorant-decomposing light. Color-converting layers are formed in positions corresponding to the color filter layers. The color-converting colorant is decomposed by light outside the wavelength region transmitted by the color filter layers. The colorant-decomposing light contains a wavelength component that decomposes the color-converting colorant, and the color-converting layers emit, through wavelength distribution conversion, light that will be transmitted by the color filter layers.
1. A method of manufacturing a color-converting filter, comprising:
forming color filter layers on a transparent substrate;
forming a colorant layer containing a color-converting colorant on said color filter layers; and
exposing said colorant layer through said transparent substrate and said color filter layers using colorant-decomposing light to form color-converting layers in positions corresponding to said color filter layers;
wherein said color-converting colorant is decomposed by light outside a wavelength region transmitted by said color filter layers;
said colorant-decomposing light contains a wavelength component that decomposes said color-converting colorant; and
said color-converting layers emit, through wavelength distribution conversion, light that will be transmitted by said color filter layers.
2. The method of manufacturing a color-converting filter according to claim 1 , wherein said colorant-decomposing light is white light.
3. A method of manufacturing a color-converting filter, comprising:
forming color filter layers of n types on a transparent substrate;
forming a colorant layer containing color-converting colorants of n−1 types on said color filter layers of the n types; and
exposing said colorant layer through said transparent substrate and said color filter layers using colorant-decomposing light, to form color-converting layers of an m th type in positions corresponding to said color filter layers of the m th type;
wherein n represents an integer from 2 to 6, and m takes on the values of all integers from 1 to n−1;
each of the n types of said color filter layers transmits light in a different wavelength region;
the m th type of said color-converting colorants is decomposed by light not transmitted by said color filter layers of the m th type; and
said color-converting layers of the m th type emit, through wavelength distribution conversion, light that will be transmitted by said color filter layers of the m th type.
4. The method of manufacturing a color-converting filter according to claim 3 , wherein said color filter layers of the (m+1) th type transmit light of a shorter wavelength than said color filter layers of the m th type, and the m th type of said color-converting colorants is decomposed by light of a shorter wavelength than the light transmitted by said color filter layers of the m th type.
5. The method of manufacturing a color-converting filter according to claim 4 , wherein said colorant-decomposing light contains wavelength components that together decompose all of the n−1 types of said color-converting colorants.
6. The method of manufacturing a color-converting filter according to claim 4 , wherein exposure is carried out a plurality of times, and a wavelength component that decomposes the m th type of said color-converting colorants is contained in the colorant-decomposing light used in at least one of the plurality of exposures.
7. The method of manufacturing a color-converting filter according to claim 3 , wherein said colorant-decomposing light contains wavelength components that together decompose all of the n−1 types of said color-converting colorants.
8. The method of manufacturing a color-converting filter according to claim 7 , wherein said colorant-decomposing light is white light.
9. The method of manufacturing a color-converting filter according to claim 8 , wherein exposure is carried out n−1 times, and the m th exposure is carried out using light containing the wavelength component that decomposes the m th type of said color-converting colorants.
10. The method of manufacturing a color-converting filter according to claim 3 , wherein exposure is carried out a plurality of times, and a wavelength component that decomposes the m th type of said color-converting colorants is contained in the colorant-decomposing light used in at least one of the plurality of exposures.
11. The method of manufacturing a color-converting filter according to claim 3 , wherein said colorant layer further contains an n th type of color-converting colorant, color-converting layers of the n th type are formed through exposure in positions corresponding to said color filter layers of the n th type, the n th type of said color-converting colorants is decomposed by light not transmitted by said color filter layers of the n th type, and the n th type of said color-converting colorants emits, through wavelength distribution conversion, light that will be transmitted by said color filter layers of the n th type.
12. The method of manufacturing a color-converting filter according to claim 11 , wherein said color filter layers of the (m+1) th type transmit light of a shorter wavelength than said color filter layers of the m th type, the m th type of said color-converting colorants is decomposed by light of a shorter wavelength than the light transmitted by said color filter layers of the m th type, and the n th type of said color-converting colorants is decomposed by light of a shorter wavelength than the light transmitted by said color filter layers of the n th type.
13. The method of manufacturing a color-converting filter according to claim 12 , wherein said colorant-decomposing light contains wavelength components that together decompose all of the n−1 types of said color-converting colorants.
14. The method of manufacturing a color-converting filter according to claim 13 , wherein said colorant-decomposing light is white light containing a near ultraviolet component.
15. The method of manufacturing a color-converting filter according to claim 12 , wherein exposure is carried out a plurality of times, and a wavelength component that decomposes the k th type of said color-converting colorants is contained in the colorant-decomposing light used in at least one of the plurality of exposures, wherein k takes on the values of all integers from 1 to n.
16. The method of manufacturing a color-converting filter according to claim 11 , wherein exposure is carried out a plurality of times, and a wavelength component that decomposes the k th type of said color-converting colorants is contained in the colorant-decomposing light used in at least one of the plurality of exposures, wherein k takes on the values of all integers from 1 to n.
17. The method of manufacturing a color-converting filter according to claim 16 , wherein exposure is carried out n times, and the k th exposure is carried out using light containing the wavelength component that decomposes the k th type of said color-converting colorants.