Enhanced projection screen
View Patent ↗An apparatus and method for producing a screen is provided. The method includes propelling a quantity of paint comprising metallic flakes, such as aluminum flakes, toward the screen. The method also includes applying at least one magnetic field in a vicinity of the screen, wherein applying the at least one magnetic field causes at least one metallic flake in the quantity of paint to be oriented relative to the screen in a substantially preferred orientation, thereby producing a screen exhibiting beneficial projection qualities, such as brightness. The magnetic field(s) applied may be unsymmetric in the time domain of, for example, an AC component of the magnetic field.
1. A method for producing a screen, comprising:
providing a quantity of paint comprising metallic flakes to the screen;
employing an eddy inducing magnetic field configured to induce eddies in at least one metallic flake in the paint comprising metallic flakes; and
employing an orienting magnetic field configured to orient at least one metallic paint flake in the paint comprising metallic flakes on the screen in a substantially preferred orientation.
2. The method of claim 1 , wherein the paint comprises aluminum flakes.
3. The method of claim 1 , wherein the eddy inducing magnetic field is an alternating current electric field.
4. The method of claim 1 , wherein the orienting magnetic field is a direct current electric field.
5. The method of claim 1 , wherein said providing comprises propelling the quantity of paint from a distance from the screen sufficient to induce partial drying prior to substantial quantities of paint contacting the screen.
6. The method of claim 1 , wherein said providing comprises propelling the quantity of paint using a spraying mechanism traversing substantially parallel to the screen from a distance from the screen sufficient to enable said orienting magnetic field to magnetically affect the paint.
7. The method of claim 1 , wherein the substantially preferred orientation comprises a substantially aligned orientation.
8. The method of claim 1 , wherein at least one magnetic field comprises an unsymmetrical waveform.
9. A method for producing a screen, comprising:
providing a quantity of paint comprising metallic flakes to the screen with a painting device;
applying a first magnetic field tending to induce eddy current in the metallic flakes in the paint provided to the screen; and
applying a second magnetic field causing the metallic flakes in the paint to be oriented in the substantially preferred orientation when the paint contacts the screen, wherein the substantially preferred orientation comprises a substantially aligned orientation.
10. The method of claim 9 , wherein the paint comprising metallic flakes comprises aluminum.
11. The method of claim 9 , wherein the first magnetic field comprises an alternating current magnetic field and the second magnetic field comprises a direct current magnetic field.
12. The method of claim 9 , wherein said providing comprises propelling the quantity of paint from a distance from the screen sufficient to induce partial drying prior to substantial quantities of paint contacting the screen.
13. The method of claim 9 , wherein said providing comprises propelling the quantity of paint using a spraying mechanism traversing substantially parallel to the screen from a distance from the screen sufficient to enable said magnetic field to magnetically affect the paint.
14. The method of claim 9 , wherein at least one magnetic field comprises an unsymmetrical waveform.
15. The method of claim 9 , wherein the painting device comprises a nozzle and an application drum.
16. The method of claim 15 , wherein the painting device sprays the paint from the application drum via the nozzle towards the screen.
17. The method of claim 16 , wherein the paint partially dries during the spraying process when traveling through the air from the nozzle towards the screen.