Display systems and methods for mobile devices

1. A display system for a handheld mobile device having a primary display screen, the display system comprising:

an auxiliary screen; and

a connecting device coupled to the auxiliary screen and attachable to the mobile device;

wherein an image from the mobile device is producible on the auxiliary screen;

wherein the display system is removable from the mobile device;

wherein the display system is adapted to detect if the auxiliary screen is touched; and

wherein the mobile device is adapted to respond if the auxiliary screen is touched.

2. The display system according to claim 1 , wherein the auxiliary screen is collapsible, foldable or rollable.

3. The display system according to claim 1 , wherein the connecting device is retractable or spring-loaded.

4. The display system according to claim 1 , wherein the connecting device comprises an extendable member adapted to slide the auxiliary screen a distance away from the mobile device and pivot the auxiliary screen upwardly to position at about a ninety degree angle to the mobile device.

5. The display system according to claim 1 , wherein the mobile device includes a projector, wherein the display system further comprises rotating optics coupleable proximate the mobile device.

6. The display system according to claim 5 , wherein the auxiliary screen comprises a cover coupled to the mobile device, wherein the cover is rotatable to be positioned as the auxiliary screen.

7. The display system according to claim 1 , wherein the auxiliary screen comprises a projection screen, further comprising a projector proximate the auxiliary screen, the projector being adapted to project the image onto the projection screen.

8. The display system according to claim 7 , further comprising a mirror proximate the projector, the mirror being positionable to reflect the image projected from the projector onto the projection screen.

9. The display system according to claim 7 , wherein the projector comprises a digital micromirror device-based projection display system.

10. The display system according to claim 1 , further comprising a camera and an orthogonal polarizer disposed between the camera and the auxiliary screen, and further comprising a polarizer and a depolarizer disposed between a projector and the auxiliary screen, wherein if the auxiliary screen is touched, a polarized dark spot is formed on the auxiliary screen that is detectable by the camera.

11. The display system according to claim 1 , wherein the connecting device comprises at least a portion of a docking station including a support for the mobile device, wherein the auxiliary screen is coupled to the support for the mobile device.

12. The display system according to claim 1 , wherein the auxiliary screen comprises a projection screen, a liquid crystal display, an interference modular display, an electrophoretic display, or electronic paper.

13. The display system according to claim 1 , wherein the mobile device comprises a head-mountable electronic device, wherein the auxiliary screen is adapted to be positioned in a first position in front of at least one of a user's eyes and in a second position away from the at least one of the user's eyes.

14. The display system according to claim 13 , wherein the auxiliary screen is substantially translucent, wherein the image producible on the auxiliary screen comprises a far sighted focus or blurry image, and wherein the display system and mobile device are adapted to function as an augmented reality system.

15. The display system according to claim 1 , wherein the mobile electronic device comprises a calculator, a cellular phone, a projection phone, a smart phone, a personal digital assistant (PDA) device, an electronic game system, a digital video disc (DVD) player, an MP 4 player, headphones, a headset, or an earpiece.

16. A display system for a handheld mobile device having a primary display screen, the display system comprising:

an auxiliary screen;

a connecting device coupling the auxiliary screen to the mobile device for relative movement of the auxiliary screen between a retracted position enclosed adjacent and parallel to the primary display screen and an extended position opened away from the primary display screen; and

a projector including a projection optics integral with the mobile device and rotatable relative to the primary display for projecting an image onto the auxiliary screen when the auxiliary screen is brought into the extended position.

17. The system of claim 16 , wherein the connecting device comprises an extending member coupled to the auxiliary screen and a canister coupleable to the mobile device and configured for guiding the extending member between the retracted position with the extending member and auxiliary screen enclosed within the canister and the extended position with the extending member and auxiliary screen extending out through an opening in the canister.

18. The system of claim 17 , wherein the canister is configured for attachment to fit proximate a battery door of the mobile device.

19. The system of claim 18 , wherein the projection optics is rotatable relative to the primary display by pivoting of the auxiliary screen relative to the projection optics.

20. The system of claim 16 , wherein the projection optics is rotatable relative to the primary display by pivoting of the auxiliary screen relative to the projection optics.

21. A display system for a handheld mobile device having a primary display screen, the display system comprising:

an auxiliary screen;

a connecting device coupled to the auxiliary screen and attachable to the mobile device; and

rotating optics coupleable proximate the mobile device;

wherein an image from the mobile device is producible on the auxiliary screen;

wherein the display system is removable from the mobile device;

wherein the mobile device includes a projector;

wherein the auxiliary screen comprises a cover coupled to the mobile device,

wherein the cover is rotatable to be positioned as the auxiliary screen;

wherein the cover is rotatable to be positioned as a stand for the mobile device and

wherein the rotatable optics are adapted to project an image from the projector onto a horizontal surface proximate the mobile device.