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A communication device is provided and includes a first major surface including a display and a mixed array. The mixed array includes at least two different types of array units and occupies an area coinciding with, in plan view as viewed perpendicular to the major surface, at least substantially th

A communication device is provided and includes a first major surface including a display and a mixed array. The mixed array includes at least two different types of array units and occupies an area coinciding with, in plan view as viewed perpendicular to the major surface, at least substantially the entire major surface. The mixed array includes at least one emitting or transmission element and at least one input or receiving element positioned in a pixel stack.

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1. A communication device, comprising: a substrate having a first side and a second side; anda plurality of pixel stacks positioned on the substrate, each pixel stack of the plurality of pixel stacks including a plurality of pixel elements overlapping in a direction perpendicular to the substrate, t

1. A communication device, comprising: a substrate having a first side and a second side; anda plurality of pixel stacks positioned on the substrate, each pixel stack of the plurality of pixel stacks including a plurality of pixel elements overlapping in a direction perpendicular to the substrate, the plurality of pixel elements including at least one output pixel element configured to transmit an output through an exterior surface of the pixel stack in a direction away from the substrate, and at least one input pixel element configured to receive an input passing through the exterior surface and through the at least output one pixel element; anda near field communication device positioned on the communication device. 2. The communication device of claim 1, wherein the near field communication device includes an antenna. 3. The communication device of claim 1, wherein the pixel stacks extend over substantially the entire first side. 4. The communication device of claim 3, wherein the pixel stacks extend over substantially the entire second side. 5. The communication device of claim 1, further including a plurality of pinhole passages, wherein each pinhole passage of the plurality of pinhole passages extends between an opening at the exterior surface of at least one pixel stack and a pixel element of the pixel stack. 6. The communication device of claim 5, wherein the plurality of pinhole passages is arrayed over substantially the entire first side. 7. The communication device of claim 5, wherein each pinhole passage of the plurality of pinhole passages includes an interior, and the interior is coated with a material that reduces the reflection of light. 8. The communication device of claim 5, wherein each pinhole passage of the plurality of pinhole passages is centrally located in the at least one pixel stack. 9. A communication device, comprising: a substrate having a first side and a second side;a plurality of pixel stacks positioned on the substrate, each pixel stack of the plurality of pixel stacks including a plurality of pixel elements overlapping in a direction perpendicular to the substrate, the plurality of pixel elements including at least one pixel element having an output function and at least one pixel element having an input function;a plurality of pinhole passages arrayed over substantially the entire first side, wherein each pinhole passage extends between an opening at an exterior surface of at least one pixel stack and a pixel element of the at least one pixel stack, and each pinhole passage of the plurality of pinhole passages is configured to transmit light from the exterior surface to the pixel element; andat least one RFID antenna positioned on the communication device. 10. The communication device of claim 9, wherein the RFID antenna is positioned between a light detecting pixel element of the pixel stack and the substrate. 11. The communication device of claim 9, wherein the RFID antenna is positioned between a pixel stack and the substrate. 12. The communication device of claim 9, wherein the at least one RFID antenna extends about a periphery of the communication device. 13. The communication device of claim 9, further including a cover structure, and the at least one RFID antenna is positioned on the cover structure. 14. The communication device of claim 9, wherein the at least one RFID antenna includes a plurality of RFID antennas positioned as part of an RFID antenna layer. 15. The communication device of claim 14, wherein the RFID antenna layer extends over an area, coinciding in a plan view of the first side, that is substantially the entire first side. 16. The communication device of claim 9, wherein the RFID antenna layer is positioned between the plurality of pixel stacks and the substrate. 17. The communication device of claim 9, further including a circuit configured to select one of a plurality of RFID frequencies. 18. The communication device of claim 9, further including an RFID receiver configured to receive signals from the at least one RFID antenna. 19. The communication device of claim 18, further including a controller, wherein the controller is configured to receive signals from the RFID receiver and is configured to track the movement of an RFID tag by using the signals. 20. The communication device of claim 9, wherein the pixel stacks extend over substantially the entire first side. 21. The communication device of claim 9, wherein each pinhole passage of the plurality of pinhole passages includes an interior, and the interior is coated with a material that reduces the reflection of light. 22. A communication device, comprising: a substrate having a first side surface facing in a first direction, and a second side surface positioned on an opposite side of the substrate and facing in a second direction opposite the first direction;a first plurality of pixel stacks positioned on the first side surface and a second plurality of pixel stacks positioned on the second side surface, each pixel stack of the first and second plurality of pixel stacks including a plurality of pixel elements overlapping in a direction perpendicular to the substrate, the plurality of pixel elements including at least one pixel element having an output function to transmit an output away from an exterior surface of the pixel stack, and at least one pixel element having an input function to receive an input transmitted through the exterior surface of the pixel stack; andat least one RFID antenna positioned on the communication device. 23. The communication device of claim 22, wherein the at least one RFID antenna is positioned between the first plurality of pixel stacks and the second plurality of pixel stacks. 24. The communication device of claim 22, further including a plurality of pinhole passages arrayed over substantially the entire first side, each pinhole passage of the plurality of pinhole passages extending between an opening at the exterior surface of at least one pixel stack of the first plurality of pixel stacks and a pixel element of the at least one pixel stack. 25. The communication device of claim 22, further including a plurality of pinhole passages arrayed over substantially the entire first side, each pinhole passage of the plurality of pinhole passages extending between an opening at the exterior surface of at least one first pixel stack of the first plurality of pixel stacks and a second pixel element of at least one second pixel stack of the second plurality of pixel stacks.