Computer graphics processing and selective visual display system – Computer graphics processing – Graphic manipulation
Reexamination Certificate
2001-11-25
2003-05-20
Luu, Matthew (Department: 2672)
Computer graphics processing and selective visual display system
Computer graphics processing
Graphic manipulation
C345S668000, C345S173000
Reexamination Certificate
active
06567102
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to a touch screen, more specifically, to a touch screen that uses pressure to control the zoom ratio.
2. Description of the Prior Art
In modern society, computer systems are no longer viewed as costly toys reserved for the wealthy, but as necessities for ordinary people in their daily lives. Nowadays, nearly everyone has a computer system, such as a desktop computer, a laptop computer, or a personal digital assistant (PDA). Just as computer systems have become more advanced, computer monitors are constantly being redesigned to be thinner, lighter, and more convenient to use. One of the most recent innovations in computer monitor technology is the touch screen.
Among touch screens, there are two prior art that deal with zooming in on images. Please refer to
FIG. 1A
,
FIG. 1B
, and FIG.
1
C. The
FIG. 1A
is a diagram of the unmagnified display
10
of a screen showing an image.
FIG. 1B
is a diagram of a display
20
showing an image magnified using the first method of magnification.
FIG. 1C
is a diagram of a display
30
showing an image magnified using the second method of magnification. The first prior art pertaining to magnification showed in
FIG. 1B
is magnifying the upper-left section of the imaged in
FIG. 1A
by a predetermined zoom ratio. If the user wants to view other parts of the image, he can control the horizontal scrolling bar
22
and vertical scrolling bar
24
to move to the part of the image he wishes to view. The second prior art pertaining to magnification shown in
FIG. 1C
is magnifying the part of the imaged in
FIG. 1A
under the zoom area
32
by a predetermined zoom ratio and displaying it in the zoom area
32
. The user can move the zoom area
32
to view different parts of the imaged in FIG.
1
A. This kind of operation simulates viewing the imaged in
FIG. 1A
under a magnifying glass.
Among the disadvantages of the two prior arts of magnification mentioned above is that it is not convenient to use a fixed zoom ratio for all zoom functions. It can also be cumbersome to use a zoom window that cannot be easily adjusted according to the needs of the user.
SUMMARY OF INVENTION
It is therefore an objective of the claimed invention to solve the problems mentioned above by providing a touch screen that uses pressure to control the zoom ratio.
The claimed touch screen, briefly summarized, comprises a display panel, a touch sensor, and a display control. A display panel is used to display an image. A touch sensor is used to sense the intensity and position of an external force and generate a corresponding pressure signal and position signal.
A display control is connected to the display panel and the touch sensor for controlling the image and zooming in on a portion of the image according to the pressure signal and position signals. A predetermined conversion model is used to derive the zoom ratio from the pressure signal generated by the touch sensor.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
REFERENCES:
patent: 5615384 (1997-03-01), Allard et al.
patent: 6073036 (2000-06-01), Heikkinen et al.
Compal Electronics Inc.
Hsu Winston
Luu Matthew
LandOfFree
Touch screen using pressure to control the zoom ratio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Touch screen using pressure to control the zoom ratio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Touch screen using pressure to control the zoom ratio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3045172