Interferometric modulator array with integrated MEMS electrical switches

• US 7,345,805 B2
• Filed: 06/10/2005
• Issued: 03/18/2008
• Est. Priority Date: 09/27/2004
• Status: Expired due to Fees

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: IDC, LLC
• Inventors: Chui, Clarence
• Primary Examiner(s): Mack; Ricky
• Assistant Examiner(s): Choi; William C
• Application Number:
  US11/150,407
• Publication Number:
  US 20060103613A1
• Time in Patent Office: 1,012 Days
• Field of Search: 359/198, 359/224, 359/247, 359290-292, 359/298, 359/577, 359/578, 345/85, 345598-600, 356/454
• US Class Current: 359/290
• 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
• CPC Class Codes: G09G 2300/0473 Use of light emitting or modulating elements having two or more stable states when no power is applied
• CPC Class Codes: G09G 2300/06 Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3466 based on interferometric effect
• CPC Class Codes: Y10T 29/49002 Electrical device making
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

An interferometric modulator array is integrated with collapsible cavity MEMS electrical switches. The electrical switches may have similar physical geometry as the display elements. The switches may form row or column select functions for the display.

Claims

1. A display device comprising:

a MEMS display portion comprising rows and columns of MEMS elements; and

a plurality of MEMS switches formed as one or more additional rows or columns of additional MEMS elements adjacent to the MEMS elements of said display portion, wherein the pitch of the additional MEMS elements is matched with the pitch of the MEMS elements of the display, and wherein the additional MEMS elements are configured to switch signals to the display portion.

2. The device of claim 1, wherein the plurality of MEMS switches forms in part row or column select circuitry.

3. The apparatus of claim 1, further comprising:

a display;

a processor that is in electrical communication with said display portion, said processor being configured to process image data; and

a memory device in electrical communication with said processor.

4. The display system as recited in claim 3, further comprising:

an input device configured to receive input data and to communicate said input data to said processor.

5. A display device comprising:

a MEMS display portion comprising rows and columns of MEMS display elements; and

a plurality of MEMS switches formed as one or more additional rows or columns of MEMS switch elements adjacent to said display portion, wherein at least some of the plurality of MEMS switches are collapsible cavity MEMS switches that each comprise;

first and second terminals;

a first electrode; and

a deformable layer responsive to a voltage across the layer and the first electrode, wherein the first and second terminals are selectively connectable.

6. A display device comprising:

a MEMS display portion comprising rows and columns of MEMS elements; and

a plurality of MEMS switches formed as one or more additional rows or columns of additional MEMS elements adjacent to the MEMS elements of said display portion, wherein the pitch of the additional MEMS elements is matched with the pitch of the MEMS elements of the display, and wherein said MEMS display and MEMS switches are fabricated on a glass substrate.

7. A method of making a MEMS display device, the method comprising:

forming rows and columns of MEMS elements on a substrate, the elements configured to display an image; and

forming one or more additional rows or columns of additional MEMS elements on the same or a different substrate, wherein at least some of said additional MEMS elements are coupled to the rows or columns of the MEMS elements configured to display the image, wherein the pitch of the additional MEMS elements is matched with the pitch of the MEMS elements configured to display the image, and wherein at least some of the additional MEMS elements are configured to switch signals to the MEMS elements configured to display the image.

8. The method of claim 7, wherein the steps of forming the MEMS elements configured to display the image and forming the additional MEMS elements comprise performing at least some processing steps that simultaneously form components of both said MEMS elements configured to display the image and said additional MEMS elements.

9. The method of claim 8, wherein said MEMS elements configured to display the image and said additional MEMS elements are formed on a common glass substrate.

10. A display device comprising:

a MEMS display portion comprising rows and columns of MEMS elements;

a plurality of MEMS switches formed as one or more additional rows or columns of additional MEMS elements adjacent to said display portion, wherein the pitch of the additional MEMS elements is matched with the pitch of the MEMS elements of the display portion;

a display;

a processor that is in electrical communication with said display, said processor being configured to process image data;

a memory device in electrical communication with said processor;

a first controller configured to send at least one signal to said display; and

a second controller configured to send at least a portion of said image data to said first controller.

11. A display device comprising:

a MEMS display portion comprising rows and columns of MEMS elements;

a plurality of MEMS switches formed as one or more additional rows or columns of additional MEMS elements adjacent to said display portion, wherein the pitch of the additional MEMS elements is matched with the pitch of the MEMS elements of the display portion;

a display;

a processor that is in electrical communication with said display, said processor being configured to process image data;

a memory device in electrical communication with said processor;

an image source module configured to send said image data to said processor.

12. A display device comprising:

a MEMS display portion comprising rows and columns of MEMS elements;

a plurality of MEMS switches formed as one or more additional rows or columns of additional MEMS elements adjacent to said display portion, wherein the pitch of the additional MEMS elements is matched with the pitch of the MEMS elements of the display portion;

a display;

a processor that is in electrical communication with said display, said processor being configured to process image data;

a memory device in electrical communication with said processor; and

an image source module configured to send said image data to said processor,

wherein said image source module comprises at least one of a receiver, transceiver, and transmitter.

13. A display device configured to display an image based on data, the device comprising:

means for displaying the image, the displaying means comprising rows and columns of MEMS elements; and

means for switching data to the means for displaying, the switching means comprising a plurality of MEMS switches arranged in one or more additional rows or columns of additional MEMS elements adjacent to said display portions, wherein the pitch of the additional MEMS elements is matched with the pitch of the MEMS elements of the display portion.

14. The device of claim 13, further comprising:

means for selecting rows or columns; and

means for switching data to the selected rows and columns.