Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Reexamination Certificate
1998-05-21
2001-03-20
Shankar, Vijay (Department: 2778)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
C345S163000, C345S164000, C345S167000
Reexamination Certificate
active
06204838
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a computer pointing device, and more particularly, to a pointing device for controlling scrolls of a screen image.
2. Description of the Prior Art
A traditional pointing device commonly uses a rolling wheel rotatable along a front-and-rear direction to scroll a screen image. It comprises a vertical sensor installed below the rolling wheel for detection of its movements. The rolling wheel comprises a chassis installed on a top side of a mouse and can be clicked to trigger the vertical sensor. The vertical sensor is used for generating control signals such as a page mode scrolling command or a line mode scrolling command. However, the rolling wheel has a very complicated mechanical and electrical interface.
For continuous scrolling of the screen image, the user must repeatedly rotate the rolling wheel. In addition, the rolling wheel must be pressed down in order to trigger a different control mode. The action of simultaneously pressing down the rolling wheel while repeatedly moving it in order to trigger a different control mode is a difficult action to perform for the user.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide a pointing device for scrolling a screen image to solve the above mentioned problems.
In a preferred embodiment, the present invention comprises a pointing device comprising:
a chassis;
a housing comprising an opening on its top mounted on the chassis;
a vertical sensor installed on the chassis below the opening;
a plurality of horizontal sensors installed on the chassis beside the vertical sensor;
a control stick vertically installed inside the opening of the housing comprising a top end and a bottom end wherein the bottom end is in contact with the vertical sensor, the top end protrudes from the opening of the housing and can be horizontally moved within a predetermined angle with respect to the bottom end of the control stick as its center;
a plate horizontally installed at the bottom end of the control stick comprising a bottom side positioned above the horizontal sensors wherein horizontal movement of the control stick will move the plate allowing the bottom side of the plate to trigger at least one horizontal sensor; and
a control device electrically connected to the vertical and horizontal sensors for detecting vertical movements of the control stick using the vertical sensor and generating correspondent vertical signals, and detecting horizontal movements of the control stick using the horizontal sensors and generating correspondent horizontal signals.
It is an advantage of the present invention that the pointing device has a very simple structure and a very compact size. Moreover, when continuously scrolling the screen image, the control stick needs only to be moved in one direction. Used in this manner, the device creates comfort for the user through its ease of use.
This and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiment which is illustrated in the various figures and drawings.
REFERENCES:
patent: 5157381 (1992-10-01), Cheng
patent: 5298919 (1994-03-01), Chang
patent: 5446481 (1995-08-01), Gillick et al.
patent: 5530455 (1996-06-01), Gillick et al.
patent: 5771038 (1998-06-01), Wang
patent: 5883619 (1999-03-01), Ho et al.
Chang Chen-Ming
Liu Shu-Ming
Wang Han Che
Yen Hong-Che
Primax Electronics Ltd.
Shankar Vijay
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