Interferometric modulator array with integrated MEMS electrical switches
View Patent ↗An iterferometric 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.
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, wherein the MEMS switches and the MEMS elements of the display portion comprise collapsible cavities, wherein the MEMS switches each comprise:
a first terminal connected to one of the rows or one of the columns;
a second terminal configured to be connected to another circuit; and
a conductive strip, configured to move between at least first and second positions, wherein the conductive strip is electrically connected to the first and second terminals when in the first position, and the conductive strip is electrically disconnected from the first and second terminals when in the second position.
2. The device of claim 1 , wherein the plurality of MEMS switches forms in part row or column select circuitry.
3. The device of claim 1 , wherein the pitch of the MEMS switches matches the pitch of the MEMS elements of the display portion.
4. The device of claim 1 , wherein the MEMS elements of the display portion each comprise an interferometric cavity.
5. The device of claim 1 , wherein the MEMS switches and the MEMS elements of the display portion are at least partially formed with the same manufacturing steps.
6. The device of claim 1 , further comprising:
a processor that is in electrical communication with the display portion, the processor being configured to process image data; and
a memory device in electrical communication with the processor.
7. The device of claim 6 , further comprising a driver circuit configured to send at least one signal to the array.
8. The device of claim 7 , further comprising a controller configured to send at least a portion of the image data to the driver circuit.
9. The device of claim 6 , further comprising an image source module configured to send the image data to the processor.
10. The device of claim 9 , wherein the image source module comprises at least one of a receiver, transceiver, and transmitter.
11. The device of claim 6 , further comprising an input device configured to receive input data and to communicate the input data to the processor.
12. A method of manufacturing a display device, the method comprising:
forming a MEMS display portion comprising rows and columns of MEMS elements; and
forming a plurality of MEMS switches as one or more additional rows or columns of additional MEMS elements adjacent to the MEMS elements, wherein the MEMS switches and the MEMS elements of the display portion comprise collapsible cavities, wherein forming the MEMS switches comprises:
forming a first terminal connected to one of the rows or one of the columns;
forming a second terminal configured to be connected to another circuit; and
forming a conductive strip, configured to move between at least first and second positions, wherein the conductive strip is electrically connected to the first and second terminals when in the first position, and the conductive strip is electrically disconnected from the first and second terminals when in the second position.
13. The method of claim 12 , wherein the plurality of MEMS switches forms in part row or column select circuitry.
14. The method of claim 12 , wherein the pitch of the MEMS switches matches the pitch of the MEMS elements of the display portion.
15. The method of claim 12 , wherein the MEMS elements of the display portion each comprise an interferometric cavity.
16. The device of claim 12 , wherein the MEMS switches and the MEMS elements of the display portion are at least partially formed with the same manufacturing steps.