Touch-Down Feed-Forward in 30D Touch Interaction

• US 20080288895A1
• Filed: 06/24/2005
• Published: 11/20/2008
• Est. Priority Date: 06/29/2004
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Kleinhout, Huib V., Hollemans, Gerard, Buil, Vincent P., Hoonhout, Jettie C. M., Van de Wijdeven, Sander B. F.
• Application Number:
  US11/570,925
• Publication Number:
  US 20080288895A1
• Time in Patent Office: Days
• US Class Current: 715/863
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 2203/04806 Zoom, i.e. interaction techniques or interactors for controlling the zooming operation
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0481 based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A 3-D display device in which zooming is controlled based on the distance that a user'"'"'s finger is from the display screen, generates a virtual drop shadow of the user'"'"'s finger at the detected X/Y position of the user'"'"'s finger with respect to the display screen. The virtual drop shadow represents the center of the zooming of the display image. In addition the size and darkness of the drop shadow is changed relative to the distance that the user'"'"'s finger is from the display screen.

Claims

1. A 3-D display device capable of selectively zooming an image being displayed on said display device, said 2-D display device comprising:

means (22, 24, 26) for detecting a distance (Z) that a finger (42) of a user is from a display screen 10 of the display device, said detecting means (22, 24, 26) generating a detection signal when said distance is within a first predetermined threshold distance (36);

means (22, 24, 26) for determining a position of said user'"'"'s finger (42) with respect to said display screen (10);

means (28, 30, 36, 38) for displaying a virtual drop shadow (46) on said display screen (10) at said determined position in response to said detection signal, said virtual shadow (46) having predetermined initial parameters when said user'"'"'s finger (42) is at said first predetermined threshold distance (36);

means (28, 34) for initiating zooming of said image in response to said detection signal, said zooming being centered on said determined position, and an amount of said zooming being inversely dependent on said detected distance (Z); and

means (28) for changing at least one of said predetermined initial parameters of the virtual drop shadow (46) with respect to said detected distance (Z).

2. The 3-D display device as claimed in claim 1, wherein said detecting means (22, 24, 26) stops generating said detection signal when said user'"'"'s finger (42) passes a second predetermined threshold distance (48), said second predetermined threshold distance (48) being closer to said display screen (10) than said first predetermined threshold distance (36).

3. The 3-D display device as claimed in clam 1, wherein said predetermined initial parameters include size, color, darkness and texture.

4. The 3-D display device as claimed in claim 3, wherein said changing means (28) decreases the size of said virtual drop shadow with respect to said detected distance.

5. The 3-D display device as claimed in claim 3, wherein said changing means (28) varies the darkness of said virtual drop shadow with respect to said detected distance.

6. The 3-D display device as claimed in claim 3, wherein said changing means (28) changes the color of said virtual drop shadow with respect to said detected distance.

7. A method for selectively zooming an image being displayed on said display device, said 2-D display device comprising the steps of:

detecting ((22, 24, 26) a distance (Z) that a finger (42) of a user is from a display screen (10) of the display device, and generating a detection signal when said distance (Z) is within a first predetermined threshold distance (36);

determining (22, 24, 26) a position of said user'"'"'s finger (42) with respect to said display screen (10);

displaying (28, 30, 36, 38) a virtual drop shadow (46) on said display screen (10) at said determined position in response to said detection signal, said virtual drop shadow (46) having predetermined initial parameters when said user'"'"'s finger (42) is at said first predetermined threshold distance (36);

initiating zooming (28, 34) of said image in response to said detection signal, said zooming being centered on said determined position, and an amount of said zooming being inversely dependent on said detected distance (Z); and

changing (28) at least one of the predetermined initial parameters of the virtual drop shadow with respect to said detected distance.

8. The method as claimed in claim 7, wherein in said detecting step, the generation of said detection signal is stopped when said user'"'"'s finger (42) passes a second predetermined threshold distance (48), said second predetermined threshold distance (48) being closer to said display screen (10) than said first predetermined threshold distance (36).

9. The method as claimed in claim 7, wherein said predetermined initial parameters include size, color, darkness and texture.

10. The method as claimed in claim 9, wherein said changing step decreases the size of said virtual drop shadow with respect to said detected distance.

11. The method as claimed in claim 9, wherein said changing step varies the darkness of said virtual drop shadow with respect to said detected distance.

12. The method as claimed in claim 9, wherein said changing step changes the color of said virtual drop shadow with respect to said detected distance.