Touch screen overlay for visually impaired persons

1. A touch screen overlay comprising:

a flexible, substantially planar portion having length and width dimensions corresponding to a touch screen of an electronic device;

one or more features for aligning the substantially planar portion with the touch screen; and

a pattern of a plurality of tactile features forming a single Braille pattern providing facility for user interaction with individual features by touch rather than sight;

characterized in that, through non-simultaneous sequential interaction with a subset of the plurality of tactile features, specific individual alphanumeric characters are interpreted and input into the electronic device via the touch screen.

2. The touch screen overlay of claim 1 wherein the single Braille pattern comprises one of a six-point or an 8-point Braille pattern.

3. A digital touch screen enabled device, comprising:

a touch screen for accepting touch input;

a flexible touch screen overlay having a substantially planar portion having length and width dimensions corresponding to the touch screen, one or more features for aligning the substantially planar portion with the touch screen, and a pattern of a plurality of tactile features forming a single Braille pattern providing facility for a user interaction with individual features by touch rather than sight; and

software executing on the device from a machine-readable physical medium, the software providing touch sensitive areas on the touch screen in corresponding to the single Braille pattern of the tactile features of the overlay;

characterized in that, through input of non-simultaneous sequential interaction with a subset of the plurality tactile features, specific individual alphanumeric characters are interpreted by the software.

4. The device of claim 3 wherein the single Braille pattern comprises one of a six-point or an 8-point Braille pattern.

5. A method for providing input to a touch screen of a digital device, comprising steps of:

(a) applying to the digital device an overlay comprising a flexible, substantially planar portion having length and width dimensions corresponding to a touch screen of the digital device, one or more features for aligning the substantially planar portion with the touch screen, and a pattern of a plurality of tactile features forming a single Braille pattern which provide facility for user interaction with individual tactile features openings by touch rather than sight; and

(b) executing software on the device from a machine-readable physical medium, the software providing interactive touch sensitive regions on the touch screen arranged in, and corresponding to the individual tactile features of the flexible overlay;

wherein through non-simultaneous sequential interaction with a subset of the plurality of tactile features specific individual alphanumeric characters are interpreted by the software and input into the electronic device.

6. The method of claim 5 wherein the single Braille pattern comprises one of a six-point or an 8-point Braille pattern.