Device having a conductive light absorbing mask and method for fabricating same

• US 8,638,491 B2
• Filed: 08/09/2012
• Issued: 01/28/2014
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Kothari, Manish
• Primary Examiner(s): CHOI, WILLIAM C
• Application Number:
  US13/571,130
• Publication Number:
  US 20120299886A1
• Time in Patent Office: 537 Days
• Field of Search: 359/230, 359/247, 359/290, 359/291, 359/302
• US Class Current: 359/290
• CPC Class Codes: G02B 26/00 Optical devices or arrangements for the control of light using movable or deformable optical elements control of light by modification of the optical properties of the media of the elements involved therein G02F1/00
• 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: G02B 26/0841 the reflecting element being moved or deformed by electrostatic means
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A system and method for an optical component that masks non-active portions of a display and provides an electrical path for one or more display circuits. In one embodiment an optical device includes a substrate, a plurality of optical elements on the substrate, each optical element having an optical characteristic which changes in response to a voltage applied to the optical element, and a light-absorbing, electrically-conductive optical mask disposed on the substrate and offset from the plurality of optical elements, the optical mask electrically coupled to one or more of the optical elements to provide electrical paths for applying voltages to the optical elements. In another embodiment, a method of providing an electrical signal to optical elements of a display comprises electrically coupling an electrically-conductive light-absorbing mask to one or more optical elements, and applying a voltage to the mask to activate the one or more optical elements.

Claims

1. A display, comprising:

an array including a plurality of optoelectronic devices, the array including one or more non-active areas that do not display data;

an electrically-conductive first mask disposed to absorb or attenuate light in a first non-active area of the array, at least a portion of the first mask coupled to at least one optoelectronic device to provide an electrical path between the first mask and the at least one optoelectronic device, the first mask including a first reflective layer spaced from a second reflective layer by a layer therebetween; and

an electrically-conductive second mask disposed to absorb or attenuate light in a second non-active area of the array, at least a portion of the second mask coupled to the at least one optoelectronic device to provide an electrical path between the second mask and the at least one optoelectronic device, the second mask including a first reflective layer spaced from a second reflective layer by a layer therebetween.

2. The display of claim 1, wherein the first mask and the second mask are configured to minimize reflected light.

3. The display of claim 1, wherein the first mask and the second mask are configured to reflect light of a selected color.

4. The display of claim 1, wherein at least one of the first non-active area and the second non-active area is laterally offset from an active area of the array that displays data.

5. The display of claim 1, wherein the at least one optoelectronic device includes a stationary reflective layer and a movable reflective layer configured to be driven toward the stationary reflective layer in response to a voltage applied to the at least one optoelectronic device.

6. The display of claim 5, wherein at least one of the first reflective layer and the second reflective layer of the first mask is electrically coupled to the stationary reflective layer of the at least one optoelectronic device to apply a voltage to the stationary reflective layer.

7. The display of claim 5, wherein at least one of the first reflective layer and the second reflective layer of the second mask is electrically coupled to the movable reflective layer of the at least one optoelectronic device to apply a voltage to the movable reflective layer.

8. The display of claim 5, wherein the first non-active area and the second non-active area include at least one of:

a row cut between two or more of the optoelectronic devices of the array;

a support disposed between the movable reflective layer and the stationary reflective layer of the at least one optoelectronic device;

a portion of the movable reflective layer that bends when the movable reflective layer is driven toward the stationary reflective layer of the at least one optoelectronic device; and

an area between movable reflective layers of adjacent optoelectronic devices of the array.

9. The display of claim 1, further comprising:

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

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

10. The display of claim 9, further comprising:

a driver circuit configured to send at least one signal to the display; and

a controller configured to send at least a portion of the image data to the driver circuit.

11. The display of claim 9, further comprising:

an image source module configured to send the image data to the processor, wherein the image source module includes at least one of a receiver, transceiver, and transmitter; and

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

12. A method of manufacturing a display including an array of optoelectronic devices formed on a substrate having a first area and a second area, each of the optoelectronic devices including at least one active optical component configured to display data, the method comprising:

fabricating a conductive first mask over the first area, at least a portion of the first mask electrically connected to the at least one active optical component of each of the optoelectronic devices, the first mask configured to interferometrically modulate light; and

fabricating a conductive second mask over the second area, at least a portion of the second mask electrically connected to the at least one active optical component of each of the optoelectronic devices, the second mask configured to interferometrically modulate light.

13. The method of claim 12, wherein the first mask and the second mask each include a first reflective layer spaced from a second reflective layer.

14. The method of claim 12, wherein the at least one active optical component includes a movable reflective layer and a stationary reflective layer spaced from the movable reflective layer.

15. The method of claim 12, wherein at least one of the first area and the second area is laterally offset from the at least one active optical component of each optoelectronic device.

16. A display comprising:

a plurality of optoelectronic devices,

first means for reducing light in a first inactive area that is configured to not display data, the first light-reducing means electrically coupled to at least one optoelectronic device of the plurality of optoelectronic devices to provide an electrical path between the first light-reducing means and the at least one optoelectronic device, the first light-reducing means including

first means for reflecting light,

second means for reflecting light, and

means for spacing the first light-reflecting means of the first light-reducing means and the second light-reflecting means of the first light-reducing means; and

second means for reducing light in a second inactive area that is configured to not display data, the second light-reducing means electrically coupled to the at least one optoelectronic device to provide an electrical path between the second light-reducing means and the at least one optoelectronic device, the second light-reducing means including

first means for reflecting light,

second means for reflecting light, and

means for spacing the first light-reflecting means of the second light-reducing means and the second light-reflecting means of the second light-reducing means.

17. The display of claim 16, wherein the first light-reducing means includes a first mask, or wherein the second light-reducing means includes a second mask, or wherein the first light-reflecting means of the first light-reducing means includes a first reflective layer, or wherein the second light-reflecting means of the first light-reducing means includes a second reflective layer, or wherein the spacing means of the first light-reducing means includes a layer of material, or wherein the first light-reflecting means of the second light-reducing means includes a first reflective layer, or wherein the second light-reflecting means of the second light-reducing means includes a second reflective layer, or wherein the spacing means of the second light-reducing means includes a layer of material.

18. The display of claim 16, wherein the first light-reducing means and the second light-reducing means are configured to reflect light of a selected color.

19. The display of claim 16, wherein the at least one optoelectronic device includes a stationary reflective layer and a movable reflective layer configured to be driven toward the stationary reflective layer in response to a voltage applied to the at least one optoelectronic device.

20. The display of claim 19, wherein at least one of the first light-reflecting means and the second light-reflecting means of the first light-reducing means is electrically coupled to the stationary reflective layer and wherein at least one of the first light-reflecting means and the second light reflecting means of the second light-reducing means is electrically coupled to the movable reflective layer.