Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Reexamination Certificate
1998-07-17
2001-04-10
Wu, Xiao (Department: 2774)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
C345S157000
Reexamination Certificate
active
06215472
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a structure of the direction control device of a joystick, and especially to a double axes input means with two infrared detector sets which are preferably used in the direction control of a joystick.
2. Background of the Invention
In the prior-art joystick, the movement of the joystick is controlled linearly, that is, the data of X axis and Y axis are obtained by modulating through a varied resistor. It is desired to obtain the input data of X axis and Y axis to plot a vector of absolute linear coordinates (as shown in FIG.
1
). In that, the original point (
0
,
0
) is installed on the center, for example (
50
,
50
), of a vector of absolute linear coordinates so that it may be correspondent to any point of display screen.
But the resistance of a varied resistor is adjusted by the rotation of a resistor adjusting rod, thus the linear absolute coordinate vector formed by the resistance thereof can not attain the object of a linear vector. Instead, it is presented as a vector of absolute nonlinear coordinates, as the points b and c shown in FIG.
1
—
1
. Thus, a manual fine adjustment is necessary to reset the device (as shown in FIG.
1
-
2
). Although the original point may thereby be reset, the obtained absolute coordinate vector figure is still nonlinear, i.e. the ideal condition shown in
FIG. 1
can not been presented. Furthermore, after a long period of rotation of the varied resistance, the carbon film is easy to break through extended periods of contact and friction, the correct resistance will be lost. Accordingly, the of correctness of nonlinear vector figure is further effected.
Since the prior-art joystick varies the linear signal due to the friction of the varied resistance, and each time, a fine adjustment is needed to reset the device, it is necessary to provide an improved structure of the direction control device of a joystick. By a
shape opening, a central reset hole and two infrared detector sets, when the infrared detectors have detected the movement of the fans, the signals
0
and
1
will be generated and used as data for controlling the X axis and Y axis about the direction of the joystick. When the joystick has been released, the fan shaped encoder structures of the input axes will be recycled back to the central point so that another infrared detector will pass through a reset hole. Thus, the present invention may be controlled sensitively and has a precise reset effect.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a structure of the direction control device of a joystick which may be controlled sensitively and may be precisely reset.
A further object of the present invention is to provide a structure of the direction control device of a joystick, wherein the two sides of each input encoder are installed with at least two infrared detectors.
Another object of the present invention is to provide a structure of the ideal linear direction control device of a joystick.
A structure of the direction control device of a joystick of the present invention comprises a joystick seat, a hemispherical joystick, a U shape piece, a substrate, and two fan shaped encoder structures for of the input axes, wherein a through hole is installed on the central portion of the joystick seat and four pivotal portions forming a rectangle are extended downwards from the periphery of the through hole, wherein two tightly adjacent engaging portions are installed on the proper positions inside the pivotal portion of one of the pivotal portions for engaging with a spring sleeve having a spring; and wherein the encoders are engaged on sides of the hemispherical joystick and the U shape piece, respectively. Long push pieces are installed on opposite sides of the hemispherical joystick and the U shape piece. When the joystick is released, by the pivotal portion of the joystick seat, the hemispherical joystick and the U shape piece are positioned. Moreover, at least two infrared detectors are installed on two sides of the substrate with respective to each encoder structure.
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: 5640177 (1997-06-01), Hsu
patent: 5675359 (1997-10-01), Anderson
patent: 5742278 (1998-04-01), Chen et al.
Bacon & Thomas PLLC
Sung Forn Co., Ltd.
Wu Xiao
LandOfFree
Direction control device of a joystick does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Direction control device of a joystick, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direction control device of a joystick will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2547826