Method and apparatus for controlling a multi-mode keyboard

1. A multi-mode keyboard for a portable electronic device, the keyboard comprising:

a layer of keycaps;

a layer of flexible transparent touch sensors positioned below the layer of keycaps, the layer of flexible transparent touch sensors for receiving touch input, wherein the touch input comprises navigation input;

a layer of flexible output device; and

a dome sheet positioned below the layer of flexible transparent touch sensors and the layer of flexible output device, the dome sheet for receiving key click input from the layer of keycaps through flexure of the layer of flexible transparent touch sensors and the layer of flexible output device, the dome sheet including a plurality of domes, wherein each dome corresponds to a key click input value, and wherein collapsing of each of the plurality of domes provides a different key click input value.

2. The multi-mode keyboard of claim 1 , the keyboard configured for switching from a first mode to a second mode.

3. The multi-mode keyboard of claim 2 wherein the first mode is an alphanumeric keypad mode and the second mode is a navigation mode.

4. The multi-mode keyboard of claim 1 , wherein the keyboard is configured for switching from a key click input mode to a touch input mode.

5. The multi-mode keyboard of claim 2 , wherein the layer of flexible output device comprises:

a first light guide film having first indicia viewable when the multi-mode keyboard is operating in the first mode; and

a second light guide film having second indicia viewable when the multi-mode keyboard is operating in the second mode.

6. The multi-mode keyboard of claim 5 , wherein the first indicia comprises at least alphanumeric characters.

7. The multi-mode keyboard of claim 5 , wherein the second indicia comprises a plurality of navigation characters.

8. The multi-mode keyboard of claim 5 , wherein the second indicia includes one of a telephone dial pad, a gaming layout, a symbol layout, a gesture arrow layout and a command layout.

9. The multi-mode keyboard of claim 1 further including a printed circuit board having a plurality of circuit traces, and wherein the dome sheet includes a plurality of domes, each dome in alignment with a corresponding circuit trace.

10. The multi-mode keyboard of claim 1 , wherein the layer of flexible output device comprises a layer of flexible display for displaying first indicia when the multi-mode keyboard is operating in a first mode and for displaying second indicia when the multi-mode keyboard is operating in a second mode.

11. The multi-mode keyboard of claim 10 , wherein the second indicia comprise a plurality of navigation characters.

12. The multi-mode keyboard of claim 11 , wherein the second indicia includes one of a telephone dial pad, a gaming layout, a symbol layout, a gesture arrow layout and a command layout.

13. A method for controlling a multi-mode keyboard comprising:

receiving first input data via the keyboard; and

if the first input data results in a key click input received from a first input key, switching the multi-mode keyboard from an inactive mode to a first mode displaying a first indicia on the keyboard;

if the first input data results in a key-click input received from a second input key, switching the multi-mode keyboard from the inactive mode to a second mode displaying a second indicia on the keyboard; and

wherein the first indicia and the second indicia are displayed on a layer of flexible display that flexes to provide the key click input received from the first input key and the key-click input received from the second input key.

14. The method of claim 13 , further comprising:

receiving second input data from the keyboard; and

if the second input data is a touch input or a key click input received from the second input key, switching the keyboard from the first mode to the second mode;

if the second input data is a key click input received from the first input key, switching from the second mode to the first mode.

15. The method of claim 13 wherein the first mode is a keypad mode and the second mode is a navigation mode.

16. The method of claim 13 wherein the first input key is a non-navigation key and the second input key is a navigation key.

17. A multi-mode keyboard for a portable electronic device having a processor, the keyboard comprising:

a layer of flexible transparent touch sensors for receiving touch input wherein the touch input comprises navigation input;

a flexible display layer configured for displaying at least one indicia thereon;

a dome sheet for receiving key click input, the dome sheet including a plurality of domes, wherein each dome corresponds to a key click input value, and wherein collapsing of each of the plurality of domes provides a different key click input value;

a printed circuit board including a plurality of circuit traces, each circuit trace corresponding to one of the domes;

a layer of keycaps placed on top of said layer of flexible transparent touch sensors, each keycap in alignment with a corresponding one of said domes and a corresponding one of said circuit traces;

wherein the dome sheet is positioned to receive key click input from the layer of keycaps through flexure of the layer of flexible transparent touch sensors and the flexible display layer;

wherein the keyboard is configured for switching between a first mode and a second mode based on whether touch input or key click input is received by the processor.

18. The keyboard of claim 17 wherein the flexible display layer is configured for displaying first indicia when the keyboard operates in the first mode, and second indicia when the keyboard operates in the second mode.

19. The keyboard of claim 17 wherein the first mode includes a keypad mode and the second mode includes a navigation mode.

20. the keyboard of claim 17 , wherein the flexible display layer is selected from one of a flexible OLED display and a flexible e-ink display.