Integrating graphics input device

Abstract

A graphics input device for use with a graphics processing system includes a stylus which can be manually manipulated by a user to generate graphics input signals representative of a graphics object to be drawn in a circumscribed area on a display device controlled by the graphics processing system. The graphics input device also includes a grip which can be manually manipulated by the user to generate positioning signals for repositioning the circumscribed area on the display.

I claim: 
     
       1. A graphics input device, comprising: a case assembly;   a penlike stylus;   a graphics entry area mounted to the case assembly;   an XY positioning assembly mounted to the case assembly for moveably positioning the stylus on the case assembly with respect to the graphics entry area;   an XY position signal generator mounted to the case assembly for generating graphics entry signals representative of movement of the stylus with respect to the graphics entry area;   the XY position signal generator including an XY position sensor defining the graphics entry area;   the XY positioning assembly including a carriage assembly mounted to the case assembly for moveably positioning the stylus with respect to the XY position sensor, the carriage assembly including a substantially circular aperture corresponding to the graphics entry area, the circular aperture positioned adjacent the XY position sensor;   the XY positioning assembly further including means mounted to the case assembly for retaining the stylus for movement within the circular aperture against the XY position sensor;   a gap mounted to the case assembly apart from the stylus; and   a force vector signal generator mounted to the case assembly which generates a force vector signal representing a change of a graphics entry area location in response to manipulation of the grip.   
     
     
       2. The graphics input device of claim 1, wherein the XY signal generator further includes electronic means connected to the XY position sensor for generating a sequence of X position signals and Y position signals corresponding to the image of a trace of the stylus with respect to the XY position sensor. 
     
     
       3. The graphics input device of claim 1, wherein the force vector signal generator includes means for generating a hand force signal preventing said change in the graphics entry area location, and a force vector sensor contacting the grip for generating a force vector signal indicating said change in response to manipulation of the grip. 
     
     
       4. A graphics input device of claim 1, further including conversion means connected to the XY position signal generator and to XY force vector signal generator for converting the graphics entry signals and the force vector signal to digital signals. 
     
     
       5. The graphics input device of claim 4 further including communication formatting means connected to the conversion means for interprocessor communication of the digital signals. 
     
     
       6. The graphics input device of claim 4, wherein the conversion means includes an analog-to-digital converter separate from the case assembly and means connected to the XY position signal generator, to the XY force vector signal generator and to the analog-to-digital converter for conducting the graphics input signals and force vector signal to the analog-to-digital converter. 
     
     
       7. The graphics input device of claim 1, wherein the XY positioning assembly includes means for slidably positioning the stylus on the case assembly with respect to the grip. 
     
     
       8. The graphics input device of claim 1, further including: means for slidably positioning the carriage assembly on the case assembly with respect to the grip; and   means for electrically positioning the graphics entry area with respect to the carnage assembly in response to said positioning of the carriage assembly.   
     
     
       9. The graphics input device of claim 1, further including function keys mounted on the carriage assembly. 
     
     
       10. The graphics input device of claim 1, wherein the XY position signal generator includes means for conditioning the graphics entry signals to represent an amount of pressure which the stylus contacts the graphics entry area. 
     
     
       11. The input graphics device of claim 4, further including: means in the XY position signal generator for conditioning the graphics entry signals to indicate location of the stylus with respect to the graphics entry area and an mount of pressure with which the stylus contacts the graphics entry area; and   means in the conversion means for converting the graphics entry signals to first signals indicating the location of the stylus with respect to the graphics entry area and second signals representing the amount of pressure with which the stylus contacts the graphics entry area.   
     
     
       12. In a graphics processing system in which a graphics processor responds to graphics input signals descriptive of a graphics object by operating a graphics output device to display the graphics object, a combination for providing graphics input signals representing the graphics object, the combination comprising: a graphics input device, including: a case assembly for stationary operation;   a manually operable grip means mounted on the case assembly for providing a vector signal representing an updated display location on the graphics output device;   pressure-responsive handforce signal means mounted on the case assembly for generating a handforce signal preventing a change from a first display location to the updated display location;   area means on the case assembly for defining a position area on said graphics output device at a display location;   a penlike stylus;   a carriage assembly mounted to the case assembly and including an aperture corresponding to the position area, the aperture positioned adjacent the area means and means for retaining the stylus for movement within the aperture against the area means;   the area means including a position sensor responsive to movement of said stylus within said aperture for generating graphics input signals representative of a portion of a graphics object which is to be displayed on said output device in said position area; and   interface means mounted on the case assembly and connected to the gap means, the pressure-responsive handforce signal means, and the area means for receiving and formatting the vector signal, the handforce signal, and the graphics input signal: and     means in the graphics processing system and connected to the interface means for displaying a defined image entry area corresponding to the position area and for moving the image entry area from the first to the updated location on the display in response to the vector signal and absence of the handforce signal, and for displaying the graphics object in the image entry area in response to the graphics input signals.   
     
     
       13. The combination of claim 12, further including means on the case assembly for positioning the stylus with respect to the gap means. 
     
     
       14. A graphics input device for mimicking hand movements in drawing, writing, or manipulating graphics objects, the input device including: a case assembly;   a pen-like stylus;   a stylus position sensor mounted in the case assembly for converting movement of the stylus into graphics input signals representative of drawing a graphics object;   retention means for movably positioning the stylus on the case assembly in a moveable relationship against a position entry area of the stylus position sensor;   a hand grip mounted on the case assembly separately from the stylus;   means for positioning the stylus on the case assembly with respect to the hand grip, the means for positioning including a carriage assembly slidably mounted to the case assembly and having an aperture corresponding to the position entry area and means for moveably mounting the stylus on the carriage for movement within the position entry area:   a hand grip sensor mounted in the case assembly for converting manipulation of the hand grip into graphics entry area positioning signals representing a display location of the position entry area; and   a handforce means mounted on the case assembly for generating a handforce signal in response to pressure on the case assembly which prevents repositioning the position entry area at the display location indicated by the positioning signals.   
     
     
       15. The graphics input device of claim 14, wherein the retention means further includes a slide pivotally connected to the case assembly between the retention means and the stylus position sensor which receives the stylus for pivoted slideable movement in the position entry area of the stylus position sensor. .Iadd. 
     
     
       16.  A graphics processing system, comprising: a graphics input device, including: a case assembly;   a stylus with a tip;   first means in the case assembly for moveably retaining the stylus in the case assembly for movement within a predefined aperture;   second means in the case assembly in contact with the stylus tip for transforming movement of the stylus tip into graphics input signals;   a grip assembly mounted on the case assembly adjacent the stylus;   third means mounted in the case assembly in contact with the grip assembly for transforming pressure on the grip assembly into aperture relocation signals;     programmed processing means coupled to the second and third means for formatting and communicating graphics entry signals and aperture relocation signals; and   display processing means, including a display, for: displaying a viewing aperture at a first location, the viewing aperture corresponding in shape to the predefined aperture;   moving the viewing aperture from the first to a second location in response to communicated aperture relocation signals; and   displaying a graphical tracing movement of the stylus tip in the viewing aperture locations in response to graphics entry signals communicated by the programmed processing means..Iaddend..Iadd.17. The graphics processing system of claim 16, wherein the viewing aperture is a circular aperture..Iaddend..Iadd.18. The graphics processing system of claim 16, wherein the first and second locations are overlapping locations..Iaddend..Iadd.19. The graphics processing system of claim 16, wherein the stylus and hand grip are positioned in the case assembly to be     
     
     
        enclosed in the hand of a user..Iaddend..Iadd.20.  In a graphics display system including a graphics entry device having a stylus and a hand grip mounted on a case assembly and signal means in the case assembly for generating graphics entry signals corresponding to movement of the stylus within a predetermined aperture and for generating viewing aperture repositioning signals in response to pressure on the hand grip, a display device, and means connected to the signal means and to the display device for communicating the graphics entry signals and viewing aperture repositioning signals to the display device, a method for displaying graphics objects, the method comprising the steps of: displaying a viewing aperture at a first display location;   generating viewing aperture repositioning signals by applying pressure to the hand grip;   moving the viewing aperture to a second display location in response to the viewing aperture repositioning signals;   generating graphics entry signals by moving the stylus; and   displaying a graphics object tracing the movement of the stylus in the first and second display locations in response to the graphics entry signals..Iaddend..Iadd.21. The method of claim 20, wherein the viewing aperture is a circular aperture..Iaddend..Iadd.22. The method of claim 21, wherein the first and second display locations are overlapping locations.