Digitizer with illuminable working surface

Claim 2

A digitizer tablet structure having a working surface which may be illuminated, comprising: a light-transmitting layer one surface of which is said working surface; a position determining structure disposed generally coextensive with said working surface and which cooperates with an object movable on or adjacent said working surface when at least one of said position determining structure and said movable object is energized to generate signals representative of the position of said movable object with respect to said working surface; a substantial space between said position determining structure and said light-transmitting layer; and spacer means in said space between said position determining structure and said light-transmitting layer for spacing said light transmitting layer from at least said position determining structure, said spacer means being light transmitting and occupying only a small volume of said space; said digitizer structure being configured to project light from a source to said light-transmitting layer through said space to illuminate said working surface.

Claim 3

The digitizer tablet structure of claim 1 wherein said light-transmitting layer is immediately adjacent said space.

Claim 4

The digitizer tablet structure of claim 1 wherein said spacer means maintains a uniform space height of between about 0.030 inch and about 1.0 inch.

Claim 5

The digitizer tablet structure of claim 1 wherein said spacer means comprises at least one elongated element extending for a substantial distance in said space generally parallel to said light-transmitting layer.

Claim 6

The digitizer tablet structure of claim 4 wherein said at least one elongated element has a cylindrical outer surface of a diameter substantially equal to said height of said space.

Claim 7

The digitizer tablet structure of claim 5 wherein said at least one elongated element is an optical fiber.

Claim 8

The digitizer tablet structure of claim 5 wherein said at least one elongated element is a solid cylindrical rod.

Claim 9

The digitizer tablet structure of claim 1 wherein said position determining structure is substantially light transmitting, and said digitizer tablet structure is configured to project light to said light-transmitting element from said source through said position determining structure.

Claim 10

The digitizer tablet structure of claim 8 including said light source which is disposed on a side of said position-determining structure opposite said space.

Claim 11

The digitizer tablet structure of claim 1 wherein said digitizer structure is configured to project light from said source to said space without passing through said position determining structure.

Claim 12

The digitizer tablet structure of claim 10 wherein said light source has a light-projecting portion, said digitizer tablet structure including said light-projecting portion disposed between said position-determining structure and said space.

Claim 13

The digitizer tablet structure of claim 11 wherein said light-projecting portion of said light source comprises a thin panel.

Claim 14

The digitizer tablet structure of claim 12 wherein said panel is a fiber optic panel.

Claim 15

The digitizer tablet structure of claim 12 wherein said panel is an electroluminescent panel.

Claim 16

The digitizer tablet structure of claim 1 wherein said space is an air space.

Claim 17

A translucent digitizer tablet structure having a working surface which may be illuminated, comprising: a light-transmitting layer one surface of which is said working surface; a substantially light-transmitting position determining structure generally coextensive with said working surface and which cooperates with an object movable on or adjacent said working surface when at least one of said position determining surface and said movable object is energized to generate signals representative of the position of said movable object with respect to said working surface; a substantial space between said position determining structure and said light-transmitting layer; and spacer means in said space between said position determining structure and said light-transmitting layer for spacing said light transmitting layer at least from said position determining structure, said spacer means being light transmitting and occupying only a small volume of said space; said digitizer tablet passing light projected from a side of said position-determining structure opposite said space to said working surface through said space to illuminate said working surface.

Claim 18

A translucent digitizer tablet structure having a working surface which may be illuminated, comprising: a light-transmitting layer one surface of which is said working surface; a substantially light-transmitting position determining structure generally coextensive with said working surface and which cooperates with an object movable on or adjacent said working surface when at least one of said position determining surface and said movable object is energized to generate signals representative of the position of said movable object with respect to said working surface; a substantial space between said position determining structure and said light-transmitting layer; and spacer means in said space between said position determining structure and said light-transmitting layer for spacing said light transmitting layer at least from said position determining structure, said spacer means being light transmitting and occupying only a small volume of said space; said digitizer tablet passing light projected from a side of said position-determining structure opposite said space to said working surface through said space to illuminate said working surface.

Claim 19

The digitizer tablet structure of claim 16 wherein said light-transmitting layer is immediately adjacent said space.

Claim 20

The digitizer tablet structure of claim 17 wherein said spacer means maintains a uniform space height of between about 0.030 inch and about 1.0 inch.

Claim 21

The digitizer tablet structure of claim 16 including said light source which is disposed on a side of said position-determining structure opposite said space.

Claim 22

The digitizer tablet structure of claim 16 wherein said spacer means comprises at least one elongated element having a cylindrical outer surface of a diameter substantially equal to said height of said space, said elongated element extending for a substantial distance in said space substantially parallel to said light-transmitting layer.

Claim 23

The digitizer tablet structure of claim 20 wherein said at least one elongated element is an optical fiber.

Claim 24

The digitizer table structure of claim 20 wherein said at least one elongated element is a solid cylindrical rod.

Claim 25

The digitizer tablet of structure of claim 16 wherein said space is an air space.

Claim 26

A digitizer tablet structure having a working surface which may be illuminated, comprising: a light-transmitting layer one surface of which is said working surface; a position determining structure generally coextensive with said working surface and which cooperates with an object movable on or adjacent said working surface when at least one of said position determining structure and said movable object is energized to generate signals representative of the position of said movable object with respect to said working surface; a substantial space between said position determining structure and said light-transmitting layer; and said digitizer structure being configured to project light from a source through said space to said light-transmitting layer without passing through said position determining structure to illuminate said working surface.

Claim 27

A digitizer tablet structure having a working surface which may be illuminated, comprising: a light-transmitting layer one surface of which is said working surface; a position determining structure generally coextensive with said working surface and which cooperates with an object movable on or adjacent said working surface when at least one of said position determining structure and said movable object is energized to generate signals representative of the position of said movable object with respect to said working surface; a substantial space between said position determining structure and said light-transmitting layer; and said digitizer structure being configured to project light from a source through said space to said light-transmitting layer without passing through said position determining structure to illuminate said working surface.

Claim 28

The digitizer tablet structure of claim 24 wherein said light-transmitting layer is immediately adjacent said space.

Claim 29

The digitizer tablet structure of claim 24 wherein said light source has a light-projecting portion, said digitizer tablet structure including said light projecting portion disposed between said position determining structure and said space.

Claim 30

The digitizer tablet structure of claim 26 wherein said light-projecting portion of said light source comprises a thin panel.

Claim 31

The digitizer tablet structure of claim 27 wherein said panel is a fiber optic panel.

Claim 32

The digitizer tablet structure of claim 27 wherein said panel is an electroluminescent panel.

Claim 33

The digitizer tablet structure of claim 24 wherein said space has a height of between about 0.030 inch and about 1.0 inch.

Claim 34

The digitizer tablet structure of claim 24 including spacer means in said space for maintaining a given space height, said spacer means being light-transmitting and occupying only a small volume of said space.

Claim 35

The digitizer tablet structure of claim 31 wherein said spacer means comprises at least one elongated member having a cylindrical outer surface of a diameter substantially equal to said height of said space, said elongated member extending for a substantial distance in said space substantially parallel to said first light-transmitting layer.

Claim 36

The digitizer tablet structure of claim 32 wherein said at least one elongated element is an optical fiber.

Claim 37

The digitizer tablet structure of claim 32 wherein said at least one elongated element is a solid cylindrical rod.

Claim 38

The digitizer tablet structure of claim 24 wherein said space is an air space.

Claim 39

The digitizer tablet structure of claim 26 including means for joining said light-transmitting layer and said light-projecting portion into a first unit, and means for forming a second unit comprising said position determining structure, said first unit being structured to fit over and be usable with said second unit such that said working surface of said first unit functions as a working surface for position determination thereon in cooperation with said second unit.

Claim 40

The digitizer tablet structure of claim 26 including means for joining said light-transmitting layer, said light-projecting portion and said position determining structure into a single unit.

Claim 41

The digitizer tablet structure of claim 11 including means for joining said light-transmitting layer, said spacer means and said light-projecting portion into a first unit, and means for forming a second unit comprising said position determining structure, said first unit being structured to fit over and be usable with said second unit such that said working surface of said first unit functions as a working surface for position determination thereon in cooperation with said second unit.

Claim 42

The digitizer tablet structure of claim 11 including means for joining said light-transmitting layer, said spacer means, said light-projecting portion and said position determining structure into a single unit.

Claim 43

The digitizer tablet structure of claim 16 including means for joining said light-transmitting layer, said spacer means and said position determining structure into a single unit.

Claim 44

The digitizer tablet structure of claim 19 including means for joining said light-transmitting layer, said spacer means, said position determining structure and said light source into a single unit.

Claim 45

A digitizer tablet structure having a working surface which may be illuminated, comprising: a light-transmitting layer one surface of which is said working surface; a position determining structure generally coextensive with said working surface and which cooperates with an object movable on or adjacent said working surface when at least one of said position determining structure and said movable object is energized to generate signals representative of the position of said movable object with respect to said working surface; a substantial space between said position determining structure and said light-transmitting layer; means for illuminating said working surface comprising means disposed between said position-determining structure and said space for projecting light through said space to said light-transmitting layer to illuminate said working surface; and means for joining said light-transmitting layer, said thin panel and said position determining structure into a single unit.

Claim 46

A digitizer tablet structure having a working surface which may be illuminated, comprising: a light-transmitting layer one surface of which is said working surface; a position determining structure generally coextensive with said working surface and which cooperates with an object movable on or adjacent said working surface when at least one of said position determining structure and said movable object is energized to generate signals representative of the position of said movable object with respect to said working surface; a substantial space between said position determining structure and said light-transmitting layer; means for illuminating said working surface comprising means disposed between said position-determining structure and said space for projecting light through said space to said light-transmitting layer to illuminate said working surface; and means for joining said light-transmitting layer, said thin panel and said position determining structure into a single unit.

Claim 47

The digitizer tablet structure of claim 42 wherein said means for projecting light comprises a thin panel.

Claim 48

The digitizer tablet structure of claim 43 wherein said panel is a fiber optic panel.

Claim 49

The digitizer tablet structure of claim 43 wherein said panel is an electroluminescent panel.

Claim 50

A tablet-type structure having a first outer generally flat surface which may function as a working surface and which may be illuminated and a second opposed outer surface, comprising: a light-transmitting layer one surface of which is said first outer surface; a substantial space adjacent a side of said light-transmitting layer opposite said first surface; a thin panel disposed adjacent said space for projecting light through space and through said light-transmitting layer to illuminate said first outer surface; and means for joining said first light-transmitting layer and said panel into a unit having said first and second opposed outer surfaces.

Claim 51

A tablet-type structure having a first outer generally flat surface which may function as a working surface and which may be illuminated and a second opposed outer surface, comprising: a light-transmitting layer one surface of which is said first outer surface; a substantial space adjacent a side of said light-transmitting layer opposite said first surface; a thin panel disposed adjacent said space for projecting light through space and through said light-transmitting layer to illuminate said first outer surface; and means for joining said first light-transmitting layer and said panel into a unit having said first and second opposed outer surfaces.

Claim 52

The digitizer tablet structure of claim 46 wherein said panel is a fiber optic panel.

Claim 53

The digitizer tablet structure of claim 46 wherein said panel is an electroluminescent panel.