Peripheral switches for MEMS display test

• US 20080158648A1
• Filed: 12/29/2006
• Published: 07/03/2008
• Est. Priority Date: 12/29/2006
• Status: Abandoned Application

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Inventors: Cummings, William J.
• Application Number:
  US11/648,244
• Publication Number:
  US 20080158648A1
• Time in Patent Office: Days
• US Class Current: 359/291
• CPC Class Codes: G09G 2330/10 Dealing with defective pixels
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/3466 based on interferometric effect

Abstract

A MEMS (Microelectromechanical system) device is described. The device includes an array of MEMS elements with addressing lines, one or more connection pads, and switches configured to selectively connect two or more of the addressing lines to the connection pads. The arrangement is particularly advantageous for testing the array, because test signals may be applied to the connection pads and selectively applied to separate groups of one or more MEMS elements.

Claims

1. A MEMS (Microelectromechanical system) device comprising:

an array of MEMS elements, the array comprising a plurality of addressing lines;

at least one connection pad; and

a plurality of switches configured to selectively connect one or more of the addressing lines to the at least one connection pad.

2. The device of claim 1, wherein the array comprises an interferometric light modulator.

3. The device of claim 1, wherein the connection pad comprises at least one of a bond pad and a probe pad.

4. The device of claim 1, further comprising a substrate, the substrate comprising an area configured for occupation by a driver circuit, wherein one or more of the plurality of switches are positioned in said area.

5. The device of claim 1, wherein the switches are configured to selectively connect every other row addressing line to the connection pad.

6. The device of claim 1, wherein the switches are configured to selectively connect every other column addressing line to the connection pad.

7. The device of claim 1, comprising two or more connection pads, wherein the plurality of switches is configured to selectively connect each of the addressing lines to one of the two or more connection pads.

8. The device of claim 1, comprising four or more connection pads, and the array comprising:

first and second sets of non-adjacent rows;

first and second sets of non-adjacent columns;

a first group of addressing lines connected to the first set of non-adjacent rows;

a second group of addressing lines connected to the second set of non-adjacent rows;

a third group of addressing lines connected to the first set of non-adjacent columns;

a fourth group of addressing lines connected to the second set of non-adjacent columns,

wherein the plurality of switches is configured to selectively connect each of the first, second, third, and fourth group of addressing lines to one of the four connection pads.

9. The device of claim 1, further comprising:

a display;

a processor configured to communicate with the display, the processor being configured to process image data; and

a memory device that is configured to communicate with said processor.

10. The device of claim 9, further comprising a driver circuit configured to send at least one signal to the display.

11. The device of claim 10, further comprising a controller configured to send at least a portion of the image data to the driver circuit.

12. The device of claim 9, further comprising an image source module configured to send said image data to the processor.

13. The device of claim 12, wherein the image source module comprises at least one of a receiver, transceiver, and transmitter.

14. The device of claim 9, further comprising an input device configured to receive input data and to communicate the input data to the processor.

15. A method of testing a MEMS (Microelectromechanical system) device comprising an array of MEMS elements, wherein the array comprises a plurality of addressing lines, a connection pad, and a plurality of switches configured to selectively connect the plurality of addressing lines to the connection pad, the method comprising:

providing an electrical signal to the switches so as to configure the switches to electrically connect the plurality of addressing lines to the connection pad; and

providing an electrical signal to the connection pad so as to actuate one or more of the MEMS elements.

16. The method of claim 15, further comprising providing an electrical signal to the switches so as to configure the switches to electrically disconnect the plurality of addressing lines to the connection pad.

17. The method of claim 15, further comprising analyzing a response of the MEMS elements so as to determine whether the MEMS elements are operating according to an expected response.

18. The method of claim 17, wherein the response comprises an optical response.

19. A method of operating a MEMS (Microelectromechanical system) device comprising an array of MEMS elements, wherein the array comprises a plurality of addressing lines, a connection pad, and a plurality of switches configured to selectively connect the plurality of addressing lines to the connection pad, the method comprising:

providing an electrical signal to the switches so as to configure the switches to electrically disconnect the plurality of addressing lines from the connection pad; and

providing one or more electrical signals to the plurality of addressing lines so as to operate the MEMS elements.

20. The method of claim 19, wherein the array is configured to display an image in response to the electrical signals.

21. A MEMS (Michroelectromechanical system) device comprising:

an array of MEMS elements, the array comprising a plurality of addressing lines;

a connection pad; and

means for selectively connecting two or more of the addressing lines to the connection pad.

22. The device of claim 21, wherein the array comprises means for interferometrically modulating light.

23. The device of claim 21, comprising four connection pads, and the array comprising:

first and second sets of non-adjacent rows;

first and second sets of non-adjacent columns;

a first group of addressing lines connected to the first set of non-adjacent rows;

a second group of addressing lines connected to the second set of non-adjacent rows;

a third group of addressing lines connected to the first set of non-adjacent columns;

a fourth group of addressing lines connected to the second set of non-adjacent columns,

wherein the connecting means is configured to selectively connect each of the first, second, third, and fourth group of addressing lines to one of the four connection pads.