System and method for display device with reinforcing substance
View Patent ↗A package structure and method of packaging an interferometric modulator with a reinforcing substance to help support the integrity of the package. In some embodiments the reinforcing substance is a desiccant integrated into the backplate or the transparent substrate.
1. A display device comprising:
a transparent substrate;
an interferometric modulator configured to modulate light transmitted through the transparent substrate;
a backplate cover sealed to said transparent substrate to form a package, wherein said interferometric modulator is inside said package; and
a prolonged-acting desiccant associated with said backplate cover, wherein said prolonged-acting desiccant has a half-life for absorbing water of not less than 10 hours.
2. The display device of claim 1 , wherein the prolonged acting desiccant comprises calcium oxide and wherein the half-life of the prolonged acting desiccant is not less than about 40 hours.
3. The display device of claim 1 wherein said prolonged acting desiccant comprises a polymer containing zeolites.
4. The display device of claim 3 , wherein said prolonged acting desiccant absorbs water at no more than about a rate of 0.2 mg/hour.
5. The display device of claim 4 , wherein said prolonged acting desiccant absorbs water at a rate of between about 0.2 mg/hour and 0.01 mg/hour.
6. The display device of claim 1 , wherein the transparent substrate is glass.
7. The display device of claim 1 , wherein the backplate cover is glass.
8. The display device of claim 1 , wherein the device has an array of interferometric modulators disposed on the transparent substrate.
9. The display device of claim 1 , wherein the backplate cover is hermetically sealed to the transparent substrate.
10. A display device comprising:
a transparent substrate;
an array of interferometric modulators disposed on the transparent substrate and configured to modulate light transmitted through the transparent substrate;
a backplate cover;
a seal disposed between the transparent substrate and the backplate cover to form a package, wherein the array of interferometric modulators is inside said package; and
a prolonged-acting desiccant associated with the backplate cover, wherein the prolonged-acting desiccant has a half-life for absorbing water of not less than 10 hours.
11. The display device of claim 10 , wherein the prolonged acting desiccant has a half-life of not less than 40 hours
12. The display device of claim 10 , wherein the prolonged acting desiccant comprises calcium.
13. The display device of claim 10 , wherein the prolonged acting desiccant comprises a polymer containing zeolites.
14. The display device of claim 10 , wherein the prolonged acting desiccant absorbs water at a rate of between about 0.2 mg/hour and 0.01 mg/hour.
15. The display device of claim 10 , wherein the transparent substrate is glass.
16. The display device of claim 10 , wherein the backplate cover is glass.
17. The display device of claim 10 , wherein the seal is a hermetic seal.