Distributed head-mounted display system

1. An electro-optical system, including at least two spaced-apart units, comprising:

a first unit including a head-mounted display (HMD), having a video signal source, a display source for displaying video signals from the display source, an optical module for projecting video signals from the display source into a user's eye, a driving electronic module, a power supply, and a widehand receiver for receiving information from an external station; and

a second unit including a portable control and a wideband transmitter-receiver channel for two-way communication with an external station, the two spaced-apart units communicating by a narrowband wireless channel.

2. The optical system according to claim 1 , wherein said optical module comprises a collimating lens and an optical combiner.

3. The optical system according to claim 2 , wherein said optical combiner comprises a light-transmitting substrate having at least two major surfaces parallel to each other and two edges, an optical element for coupling light into said substrate by total internal reflection, and at least one partially reflecting surface located in said substrate, which surface is non-parallel to the major surfaces of said substrate.

4. The optical system according to claim 1 , wherein said video signal source is a memory device.

5. The optical system according to claim 1 , wherein said video signal source is a narrowband wireless receiver.

6. The optical system according to claim 1 , wherein said video signal source is constituted by said wideband receiver.

7. The optical system according to claim 1 , wherein said portable control further comprises a wideband transmitter-receiver.

8. The optical system according to claim 1 , wherein said portable control is a cellular phone.

9. The optical system according to claim 1 , wherein said portable control is a portable DVD.

10. The optical system according to claim 1 , wherein said portable control is a portable media player.

11. The optical system according to claim 1 , wherein said portable control is a video games console.

12. The optical system according to claim 1 , wherein said portable control is a mobile TV control.

13. The optical system according to claim 1 , wherein said portable control includes dedicated software for controlling the HMD with the narrowband channel.

14. The optical system according to claim 1 , wherein said video signal source feeds the data to said display source.

15. The optical system according to claim 1 , wherein said HMD is embedded in an eyeglasses frame.

16. The optical system according to claim 15 , wherein said HMD comprises two units for projecting the video signals into both eyes of the user.

17. The optical system according to claim 15 , wherein said HMD projects the same video signals to both of the user's eyes utilizing one display source which is located between two glasses of said eyeglasses.

18. The optical system according to claim 15 , wherein said HMD projects two different parts of the same video signals, with some overlap between both of the user's eyes.

19. The optical system according to claim 15 , wherein said HMD projects two different scenes, one to each of the user's eyes, in order to form a stereoscopic image.

20. The optical system according to claim 1 , wherein a software is installed in said portable control dedicated for operating said HMD.

21. The optical system according to claim 1 , wherein the HMD transmits information to an external station by transmitting the information to the second unit, using the narrowband channel, the second unit, acting as a relay device, transmitting the information to the external station using the wideband channel.