Methods for producing a black matrix on a lenticular lens
View Patent ↗An opaque matrix that defines transparent apertures may be formed on a lenticular lens by applying an infrared radiation sensitive material to the flat surface of the lenticular lens, projecting infrared radiation through the lenticular lens onto the infrared radiation sensitive material to create exposed and unexposed areas of the infrared radiation sensitive material, and removing the exposed areas of the infrared radiation sensitive material from the flat surface of the lenticular lens. The infrared radiation sensitive material includes an infrared absorbing dye and a colorant. The infrared radiation sensitive material may also include a binder. A barrier layer may be disposed between the flat surface of the lenticular lens and the infrared radiation sensitive material. The barrier layer may include a binder, an infrared absorbing dye, and a crosslinking agent. The resulting lenticular lens may be used in a rear projection television screen or monitor.
1. A method of forming an opaque matrix on a lenticular lens comprising the steps of:
( a ) applying an infrared radiation sensitive material comprising a colorant and an infrared absorbing dye to the flat surface of the lenticular lens;
( b ) projecting infrared radiation through the lenticular lens onto the infrared radiation sensitive material to cause localized heating in exposed areas of the infrared radiation sensitive material relative to unexposed areas of the infrared radiation sensitive material; and
( c ) using the localized heating of the exposed areas to enable removal of the exposed areas of the infrared radiation sensitive material from the flat surface of the lenticular lens by ablation.
2. The method of claim 1 , further comprising the step of applying a barrier layer to the flat surface of the lenticular lens before step (a).
3. The method of claim 2 , wherein the baffler layer comprises an infrared absorbing dye.
4. The method of claim 2 , wherein the baffler layer comprises a binder.
5. The method of claim 2 , wherein the baffler layer comprises a crossliniking agent.
6. The method of claim 1 , wherein the lenticular lens contains parallel cylindrical lenticulae.
7. The method of claim 6 , wherein the lens pitch is less than 0.3 mm.
8. The method of claim 6 , wherein the opaque matrix is formed in the shape of repeating stripes.
9. The method of claim 1 , wherein the lenticular lens contains spherical lenticulae.
10. The method of claim 1 , wherein the infrared radiation sensitive material farther comprises a binder.
11. The method of claim 1 , wherein the colorant comprises a carbon black pigment.
12. The method of claim 1 , wherein the infrared radiation sensitive material comprises a binder, an infrared absorbing dye, and a carbon black pigment.
13. The method of claim 1 , wherein the infrared radiation sensitive material farther comprises an ultraviolet absorber.
14. The method of claim 1 , wherein the infrared radiation sensitive material further comprises a latent crosslinking agent.
15. The method of claim 1 , wherein the infrared radiation sensitive material further comprises a fluorocarbon additive.
16. The method of claim 1 , wherein the step of removing the exposed areas of the infrared radiation sensitive material comprises ablation.
17. The method of claim 16 , wherein a receptor sheet is placed in close proximity with the infrared radiation sensitive material before infrared radiation is projected through the lenticular lens.
18. The method of claim 1 , wherein the opaque matrix has an edge non-linearity of 8% or less.
19. The method of claim 1 , wherein the opaque matrix has an edge non-linearity of 5% or less.
20. The method of claim 1 , wherein the apertures exhibit a mean transmittance of 85% or more.
21. The method of claim 1 , wherein the apertures exhibit a mean transmittance of 90% or more.
22. A method of forming an opaque matrix on the second surface of the lenticular lens, comprising:
( a ) applying a baffler layer to the flat surface of the lenticular lens;
( b ) applying a uniform coating of an infrared radiation sensitive material to the baffler layer, said coating being substantially continuous and having a fairly uniform thickness;
( c ) projecting infrared radiation through the lenticular lens onto the infrared radiation sensitive material to create exposed areas and unexposed areas of the infrared radiation sensitive material; and
( d ) at least partially removing, by ablation, the exposed areas of the infrared radiation sensitive material film from the barrier layer such that said removal makes the thickness of the infrared sensitive material along the barrier layer non-uniform or makes the coating so that it is no longer substantially continuous.
23. The method of claim 22 , wherein the barrier layer comprises a binder, an infrared absorbing dye, and a latent crossliniking agent.
24. A method of forming an opaque matrix on a lenticular lens comprising the steps of:
( a ) applying an infrared radiation sensitive material comprising a colorant and an infrared absorbing binder to the flat surface of the lenticular lens, said infrared absorbing binder being of a type that decomposes upon exposure to heat from infrared radiation to rapidly generate a gas; and
( b ) projecting infrared radiation through the lenticular lens onto the infrared radiation sensitive material to cause localized heating of in exposed areas of the infrared radiation sensitive material relative to unexposed areas of the infrared radiation sensitive material such that said infrared absorbing binder decomposes to rapidly generate a build up of gas under or within the exposed area of the infrared radiation sensitive material to create a pressure that propels the infrared radiation sensitive material off of the lenticular lens in the exposed areas.