Extended refreshable tactile graphic array for scanned tactile display

• US 20030151597A1
• Filed: 01/02/2003
• Published: 08/14/2003
• Est. Priority Date: 01/03/2002
• Status: Active Grant

• Current Assignee: Bretton Swope, David W Kardos, Edwin C. Mulkens, Gina Rodgers, John W. Roberts, Michael Sutton, Nicholas Guttenberg, Oliver T. Slattery, Tracy Comstock, Volker Min
• Original Assignee: Bretton Swope, David W Kardos, Edwin C. Mulkens, Gina Rodgers, John W. Roberts, Michael Sutton, Nicholas Guttenberg, Oliver T. Slattery, Tracy Comstock, Volker Min
• Inventors: Sutton, Michael, Swope, Bretton, Roberts, John W., Guttenberg, Nicholas, Comstock, Tracy, Slattery, Oliver T., Rodgers, Gina, Mulkens, Edwin C., Min, Volker, Kardos, David W.
• Granted Patent: US 7,009,595 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G09B 21/004 Details of particular tactile cells, e.g. electro-mechanical or mechanical layout

Abstract

Apparatus and methods for extended refreshable tactile graphic display are disclosed, the apparatus including an array of pins at a display surface, with pin setting actuators and display surface matrix preferably being separable units. The display matrix is provided by stacked functional layers, functions including temporary pin retention and pin locking.

Claims

1. An extended refreshable tactile graphic array apparatus for tactile display comprising:

a display surface having a pin array of at least hundreds of movable pins maintained thereat;

pin retention means for holding pins in a position when moved; and

actuating means for selectively moving pins in said pin array between at least first and second positions, a single actuator of said actuating means for moving multiple said pins in said pin array.

2. The apparatus of claim 1 wherein said actuating means includes a selected number of said single actuators to as few as one said single actuator, and wherein said pin retention means includes two-stage pin retention having a temporary retention for holding said pins temporarily in place as said pins in said pin array are being moved by said actuating means and a locking for maintaining establishment of pin positions without continued influence by said actuating means as a user senses the tactile display.

3. The apparatus of claim 1 wherein said pin array is configured in one of a rectangular pin array, a staggered pin array, and an array with pin spacing that includes a pattern configured for display of standard or near-standard dimension Braille text so that said apparatus supports display of both standard or near-standard dimension Braille text and high resolution tactile graphics.

4. The apparatus of claim 1 wherein said actuating means includes a vector drawing mechanism in which said single actuator can be moved along specified vectors for selected movement of any of said pins to generate a tactile graphic image for the entire said pin array.

5. The apparatus of claim 1 wherein said pins include enlarged heads at one end of a shaft and surface features at said shaft cooperative with said pin retention means to enable control of pin position, and wherein said surface features are sufficient to allow each of pins to be moved to a selected one of a plurality of elevations with said enlarged heads a selected distance above said display surface.

6. The apparatus of claim 1 further comprising means for moving all of said pins to a default position.

7. The apparatus of claim 1 wherein said display surface and said pin retention means are mounted together in a stacked matrix, said stacked matrix detachable from said apparatus with a tactile graphic image displayed thereat maintained, whereby a user can use said actuating means with different stacked matrices to produce multiple display surfaces having different tactile graphic images thereat for simultaneous access.

8. An extended refreshable tactile graphic array apparatus for scanned tactile display comprising:

a multiplicity of movable pins, each pin including a shaft between an enlarged head and an end;

a matrix of stacked elements including a display surface element and a pin retention element for holding pins in a position when moved, said display surface element having a user accessible display surface and an array of openings each having one of said movable pins maintained therein with said enlarged heads of said pins above said display surface and said pin ends below said display surface element; and

actuating means for selectively contacting said pin ends for moving pins maintained at said array of openings at said display surface element between at least first and second positions, a single actuator in said actuating means for moving a number of said pins.

9. The apparatus of claim 8 wherein said matrix of stacked elements includes means for holding said elements so that said pin retention element is selectively movable relative to said display surface element allowing relatively free pin movement during one stage of operation with said pin retention element at a first position and locking said pins in position during another stage of operation with said pin retention element at a second position.

10. The apparatus of claim 8 wherein said actuating means includes one of a one-dimensional scanned actuator array, a raster scanning array, or a vector drawing system.

11. The apparatus of claim 8 further comprising a flexible cover over said matrix of stacked elements at said display surface element, said enlarged heads of said pins bearing thereagainst.

12. The apparatus of claim 8 further comprising one of a roller mechanism or a plate element in said matrix for movement of said pins to a default position preparatory to resetting the display.

13. The apparatus of claim 8 further comprising means for creation of permanent copies of a display at said display surface of said display surface element.

14. The apparatus of claim 8 wherein at least one of said display surface element and said pin retention element of said matrix includes two-stage pin retention having a temporary retention for holding said pins temporarily in place as said pins are being moved by said actuating means and a locking for maintaining establishment of pin positions without continued influence by said actuating means as a user senses the tactile display.

15. A method for extended refreshable tactile graphic display comprising the steps of:

maintaining an array of at least hundreds of movable pins at a display surface;

using a single actuator to move multiple said pins in said array between at least first and second positions;

continuing to move said pins until a desired configuration is attained at said display surface;

retaining pins in a position when moved without continued influence from said actuator; and

moving said pins when desired to attain a different configuration at said display surface.

16. The method of claim 15 wherein the step of retaining moved pins in a position includes the steps of holding said pins temporarily in place as selected said pins in said array are being moved and maintaining establishment of pin positions as a user senses the tactile display, and wherein the step of moving said pins when desired to attain a different configuration at said display surface includes the step of releasing said pin positions to allow reconfiguration of the display.

17. The method of claim 15 wherein the steps of moving pins include moving said pins to a selected one of plural pin extension positions relative to said display surface to provide a tactile graphic relief display.

18. The method of claim 15 further comprising the step of making a copy of said desired configuration using a thermal sheet at said display surface.

19. The method of claim 15 wherein said steps are computer controlled and further comprise the steps of:

receiving a user issued command for the display of a tactile graphic image;

conversion of a selected graphical image to a format suitable for graphic display;

determining that said pins are ready to be moved;

if a tactile display is already set at said display surface, moving said pins to a default position after receiving said user issued command; and

when signaled by the user, receiving another user issued command for display of a new tactile graphic image.

20. The method of claim 15 further comprising configuring said array of pins at said display surface for display of one of high resolution graphic images, standard or near-standard dimension Braille text, or a combination thereof.