Tactile interface for visually impaired

1. An apparatus comprising:

a processor;

memory operatively coupled to the processor;

a touch-sensitive display operatively coupled to the processor;

a tactile braille panel operatively coupled to the processor wherein the tactile braille panel overlays at least a portion of the touch-sensitive display; and

braille rendering circuitry that, in a braille mode, renders braille characters to the tactile braille panel, that receives touch input for sensed touches of the rendered braille characters, that determines a touch rate based at least in part on the touch input, and that controls a rendering rate of braille characters to the tactile braille panel based at least in part on the determined touch rate.

2. The apparatus of claim 1 comprising circuitry that renders characters to the touch-sensitive display and that renders corresponding braille characters to the tactile braille panel.

3. The apparatus of claim 2 wherein one of the braille characters rendered to the tactile braille panel overlays a corresponding one of the characters rendered to the touch-sensitive display.

4. The apparatus of claim 1 further comprising circuitry that selectively operates the apparatus in one of a touch-sensitive display render mode, a tactile braille panel render mode and a touch-sensitive display and tactile braille panel render mode.

5. The apparatus of claim 1 further comprising a sensor operatively coupled to eye-tracking circuitry that outputs eye position information.

6. The apparatus of claim 5 further comprising circuitry that selectively operates the apparatus in one of a touch-sensitive display render mode, a tactile braille panel render mode and a touch-sensitive display and tactile braille panel render mode based at least in part on eye position information output by the eye-tracking circuitry.

7. The apparatus of claim 1 further comprising audio circuitry that generates audio signals responsive to sensed touch of one or more rendered braille characters.

8. The apparatus of claim 7 wherein the audio circuitry generates audio signals based at least in part on the determined touch rate associated with sensed touch of a plurality of rendered braille characters.

9. A method comprising:

rendering information to a touch-sensitive display;

in a braille mode, rendering braille characters to a tactile panel that overlays at least a portion of the touch-sensitive display;

determining a touch rate based on receiving touch input for sensed touches of at least some of the rendered braille characters; and

based at least in part on the touch rate, rendering additional braille characters to the tactile panel.

10. The method of claim 9 further comprising receiving touch input via the touch-sensitive display and, responsive to the touch input, refreshing the tactile panel.

11. The method of claim 9 wherein the rendering braille characters renders braille dots that comprise an elevation of at least approximately 0.5 mm.

12. The method of claim 9 further comprising rendering a tactile control to the tactile panel.

13. The method of claim 12 further comprising receiving an actuation signal associated with the tactile control and issuing a command that launches an application.

14. The method of claim 13 wherein the application comprises a media player and further comprising rendering tactile controls to the tactile panel for controlling the media player.