Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Reexamination Certificate
1998-06-01
2001-12-11
Nguyen, Chanh (Department: 2675)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
C345S163000
Reexamination Certificate
active
06329978
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cursor control device, which is a C.I.P. application of U.S. Pat. No. 08/908,098, filed on Aug. 11, 1997 and is a two axial input device, by a single operation mode, the movement of the input device is detected so as to reduce the operation range and generate an absolute coordinate so to position accurately, the input device may be a mouse, a track ball, a hand writing plate, etc. for generating the signals
0
and
1
.
2. Description of the Prior Art
In the conventional mouse, an active ball resists against two circular optic grid pieces to rotate, and then the signals,
0
and
1
are generated through the reading of a reading device. In the design of the mouse, the default reading value is installed with an acceleration ratio. Thus, by the increasing of the moving speed, the respective cursor on the display screen is also moved to a desired position rapidly. But in a virtual multiplying display screen, the input device must move many times to attain the boundary (as shown in FIG.
1
). When the cursor is moved rapidly and then is reversed, the mouse will not return to the original point. If returning to a low speed operation, the mouse must move for a long distance and the positioning performance is not accurate. In summary, during the operation of the prior mouse, the hand needs to change position and lift frequently, and thus a larger moving area is required, therefore, the input operation is not convenient.
SUMMARY OF THE INVENTION
The main object of the present invention is to provide a novel cursor control device, in which a dedicated two axial mouse moves within a very small range so to generate a positioning effect of absolute coordinate, and the controlled mouse may be used to position any point on the display screen completely.
A further object of the present invention is to provide a cursor control device, by a two axial input device to read the signals
0
and
1
from a respective movement. The respective axis is only installed with two registers so that it may be used in a general used input device, such as a mouse, a track ball, a hand writing plate, etc. Thus, the operation range is saved and the positioning operation may be performed easily. The effect thereof is much superior to any prior input device.
Another object of the present invention is to provide a cursor control device so that the cursor is controlled to move on the display screen in an absolute coordinate type and may be compatible with a general used computer by a signal of relative coordinate.
In the following, using a general used mouse for input device as an example to describe the present invention.
In using the general mouse, at least two registers are installed on each axis of the input for counting the number of the signals
0
and
1
, and presetting the rotary distance of each axis, and by a single operating mode, the movement of the mouse (input device) may be detected, therefore, so that the moving distance of the cursor on the display screen may be decided by choosing two different ratio constants according to the variation of moving speed and that the moving distance of the cursor on the display screen is positively proportional to the rotary distance of the input device, thus, the mouse may move in a very small range to generate an effect of an absolute coordinate positioning, and the controlled cursor may wholly correspond to any point on the display screen for accurate positioning and returning to the original point rapidly.
The present invention will be better understood and its numerous objects and advantages will become apparent to those skilled in the art by referencing to the following drawings in which:
REFERENCES:
patent: 4935728 (1990-06-01), Kley
patent: 5195179 (1993-03-01), Tokunaga
patent: 5293158 (1994-03-01), Soma
patent: 5488392 (1996-01-01), Harris
patent: 5568164 (1996-10-01), Ogawa
patent: 5760764 (1998-06-01), Martinelli
patent: 5771037 (1998-06-01), Jackson
patent: 6072469 (2000-06-01), Chen et al.
Chen Mei-Yun
Yeh Fu-Kuo
Alphonse Fritz
Bacon & Thomas
Nguyen Chanh
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