SYSTEM AND METHOD FOR DISPLAY DEVICE WITH REINFORCING SUBSTANCE

• US 20100172013A1
• Filed: 03/18/2010
• Published: 07/08/2010
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Palmateer, Lauren
• Granted Patent: US 7,990,601 B2
• Time in Patent Office: Days
• US Class Current: 359/290
• CPC Class Codes: B81B 2201/047 Optical MEMS not provided for in B81B2201/042 - B81B2201/045
• CPC Class Codes: B81B 3/007 For controlling stiffness, e.g. ribs
• CPC Class Codes: B81B 7/0038 using materials for controlling the level of pressure, contaminants or moisture inside of the package, e.g. getters
• CPC Class Codes: B81C 2203/0163 Reinforcing a cap, e.g. with ribs
• CPC Class Codes: G02B 26/001 based on interference in an adjustable optical cavity interference filters G02B5/28; devices or arrangements using multiple reflections in spectrometry or monochromators G01J3/26

Abstract

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.

Claims

1-27. -27. (canceled)

28. A display device comprising:

a transparent substrate comprising 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.

29. The display device of claim 28, 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.

30. The display device of claim 28 wherein said prolonged acting desiccant comprises a polymer containing zeolites.

31. The display device of claim 30, wherein said prolonged acting desiccant absorbs water at no more than about a rate of 0.2 mg/hour.

32. The display device of claim 31, wherein said prolonged acting desiccant absorbs water at a rate of between about 0.2 mg/hour and 0.01 mg/hour.

33-36. -36. (canceled)