Pen input device for high resolution displays

Claim 2

A pen assembly for controlling a position of a cursor on a display device comprising: a pen including a pointer for pointing to a desired point on a screen of the display device where the cursor is to be located; a low resolution locator associated with the screen for identifying a first location indicated by the pen on the screen relative to the desired point; a cursor controller for positioning the cursor on the screen at the first location; an imager for directly viewing an image of a portion of the screen including the first location; a host processor in signal communication with the pen, the low resolution locator and the imager, for detecting from the image a variance between the first location and the desired point and wherein the cursor controller in response to the detected variance repositions the cursor at a second location comprising the desired point.

Claim 3

The pen assembly as defined in claim 1 wherein the imager comprises a camera disposed in the pen in a general alignment for viewing the desired point and the cursor at the first location.

Claim 4

The pen assembly as defined in claim 1 wherein the detected variance comprises a spacing measured from the cursor at the first location to a central location of the image comprising the desired point.

Claim 5

The pen assembly as defined in claim 1 wherein the cursor comprises a nonsymmetrical configuration and the host processor comprises means for detecting a relative position and orientation of the cursor to the desired point.

Claim 8

The method as claimed in claim 5 wherein the sensing comprises disposing a camera in the pen wherein the camera will be aimed at the desired point for viewing the image and the variance.

Claim 9

The method as claimed in claim 5 wherein the displaying the cursor comprises displaying a nonsymmetrical pattern.

Claim 10

The method as claimed in claim 5 wherein the identifying the variance comprises measuring a spacing between the first location and the desired point exclusive of pen tilt, rotation and location.

Claim 11

The method as claimed in claim 8 wherein the sensing comprises focusing the portion through an optics lens onto a charge coupled device functioning as the imager, and wherein a host processor computes the spacing and signals a cursor controller for the moving of the cursor to a second location comprising the desired point.

Claim 12

The method as defined in claim 5 wherein said moving continually corresponds to said point as the pen is additionally moved for point to a different desired point.

Claim 13

A pen input system for identifying a cursor location on a high resolution active matrix liquid crystal display associated with a host processor comprising: a pen including a pointer for pointing to a desired point on a screen of the display at where the cursor is desired to be located; a low resolution tablet disposed to overlay the screen and calibrated to the screen for identifying a first location on the screen at which the cursor is to be located in response to an input from the pen on the tablet; a host processor in signal communication with the pen, the tablet and the display for disposing the cursor at the first location in response to a first locating signal from the pen and tablet; and, an imager in association with the pen for generating an image recognizable by the host processor to comprise a portion of the display including the desired point and the first location wherein the host processor identifies a variance between the first location and the desired point from the image and moves the cursor to a second location comprising the desired point.

Claim 14

A pen input system for identifying a cursor location on a high resolution active matrix liquid crystal display associated with a host processor comprising: a pen including a pointer for pointing to a desired point on a screen of the display at where the cursor is desired to be located; a low resolution tablet disposed to overlay the screen and calibrated to the screen for identifying a first location on the screen at which the cursor is to be located in response to an input from the pen on the tablet; a host processor in signal communication with the pen, the tablet and the display for disposing the cursor at the first location in response to a first locating signal from the pen and tablet; and, an imager in association with the pen for generating an image recognizable by the host processor to comprise a portion of the display including the desired point and the first location wherein the host processor identifies a variance between the first location and the desired point from the image and moves the cursor to a second location comprising the desired point.

Claim 15

The pen input system as claimed in claim 11 wherein the imager comprises a camera and associated optics assembly disposed in the body of the pen.

Claim 16

The pen input system as defined in claim 11 wherein said imager has a resolution finer than said high resolution display.

Claim 17

The pen input system as defined in claim 11 wherein said pen comprises a plurality of pens and said cursor comprises a plurality of cursors.