Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Reexamination Certificate
2000-05-11
2004-01-27
Chang, Kent (Department: 2673)
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
C345S680000, C345S672000
Reexamination Certificate
active
06683628
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a human interactive type display system comprising a display means having a display panel on which an image is displayed, a marking means for pointing a point on said display panel, and a controlling means for detecting coordinates of the point on the display panel pointed by said marking means and controlling the image displayed on the display panel in accordance with the detected coordinates of the point pointed by the marking means.
2. Related Art Statement
In universities, colleges and laboratories, there conventional blackboard and whiteboards have been used as a medium for communicating information between a teacher and students or a presenter and attendants or participants. Typically in a university room, teachers use a blackboard or whiteboard for lectures. However, the blackboard or whiteboard could not satisfactorily communicate information between the teacher and students. In a modern computer room, each student uses his own personal computers. Therefore, the possibility of misreading and miscopying information can be reduced. However, there is a concern that some students would focus their attention on their personal computers and would not pay attention to a teacher's explanations.
In order to solve the above mentioned problem, there have been proposed a human interactive type display system comprising a display panel displaying an image thereon, a pen-like member pointing or marking a point on the image displayed on the display panel, a means for detecting a contact condition of the pen-like member to the display panel and coordinates of a contact point, and a means for controlling the image displayed on the display panel in accordance with the detected contact condition and coordinates. Such a human interactive type display system is sometimes called a human interactive type electronic whiteboard, and is described in, for instance, Japanese Patent Application Laid-open Publication Kokai Hei 6-149531; Elrod et al, “Liveboard: A large interactive display supporting group meetings, presentations and remote collaboration”, CHI'92, Conference Proceedings, May 1992; and Perdson et al, “An electronic whiteboard for informal workgroup meetings”, INTERCHI'93, Conference Proceedings, April 1993, ACM, 391-398. In these known human interactive type dynamic display systems, the control of a displayed content is carried out by GUIs (graphical user interface) which are basically identical with the conventional GUIs used in a usual desktop type display system.
FIG. 1
shows an image displayed on the display panel of a known electronic whiteboard system, in which the displayed image on the whiteboard
101
is moved or scrolled up and down as well as right and left. On a display panel of the whiteboard
101
, there are displayed tool bars
102
and
103
for effecting the up and down scroll as well as the right and left scroll. For instance, when a user wishes to scroll the displayed image upward, the user has to handle a pen-like member or electronic chalk
104
such that an upward scroll arrow
105
a
in the up and down scroll tool bar
102
displayed along a right-hand side of the whiteboard
101
is continuously pointed by the pen-like member. As long as the user points the up scroll arrow
105
a
, the displayed image is continuously scrolled upward. Similarly, when the use points at a downward scroll arrow
105
b
by the pen-like member
104
, the displayed image is scrolled continuously in the downward direction.
Further, when rightward or leftward scroll arrows
106
a
or
106
b
in the tool bar
103
displayed along a bottom side of the whiteboard
101
is pointed at by the pen-like member
104
, the image displayed on the display panel is scrolled in the right-hand or left-hand direction, respectively. In this scroll system, it is also possible to scroll the displayed image up and down or right and left by pointing a scroll button
107
a
or
107
b
in the tool bar
102
or
103
by means of the pen-like member
104
and dragging the pen-like member up and down or right and left. This type of GUI is substantially identical with that for the conventional desktop type personal computer.
FIG. 2
is a schematic view of an image displayed on the display panel
101
of the known electronic whiteboard system, in which the page up and page down functionality is effected. If the user wishes to effect the page up or page down, a page up region
108
a
or a page down region
108
b
is indicated by the pen-like member
104
, said page up region and page down region being provided in a page up and down tool bar
108
which is displayed along a bottom side of the display panel
101
.
In the manner explained above, in the known human interactive type electronic whiteboard, since the scroll bars
102
and
103
are provided at predetermined portions of the whiteboard
101
, a part of the displayed image might be hidden by the user from people who are watching the whiteboard
101
. When the electronic whiteboard with a large size is used in a relatively large lecture room of a university, some of students can not see the displayed image sufficiently such that students can not fully or clearly understand the contents of the displayed information. Further, when the scroll is performed by dragging the scroll button
107
a
or
107
b
, it is necessary to move the pen-like member
104
over a relatively long distance, i.e. from top to bottom or from left edge to right edge. For instance, when the displayed image is to be moved rightward from the condition illustrated in
FIG. 1
, it is necessary to drag the button
107
b
rightward up to the rightward arrow mark
106
a
. To this end, the user has to walk from the left hand end to the right hand end of the whiteboard. During this movement of the user, the displayed information is partly hidden by the user. This is also applied to the page up and down operation, because the page up region
108
a
and page down region
108
b
are provided at both ends of the bottom side of the whiteboard
101
.
In the above mentioned Japanese Kokai Hei 6-149,531, there is described another known human interactive type electronic whiteboard system, in which the scroll may be carried out by dragging the pen-like member
104
on the display panel of the whiteboard
101
. However, in such a system, when it is required to scroll the displayed image over a long distance, it is necessary to move the pen-like member over a very long distance on the display panel. It is apparent that such an operation requires a large movement of the user or user's hand, and thus an amount of the displayed information hidden by the user becomes correspondingly large. Furthermore, on the electronic whiteboard, not only the text date stored in a memory is displayed, but also a graphical figure drawn by means of the pen-like member
104
is displayed. During this drawing operation, the scroll operation could not be performed, because the movement of the pen-like member
104
for the scroll could not be delineated from that for the drawing. Therefore, in such a case, before effecting the scroll, the draw mode has to be finished. Then, the operation of the user becomes very cumbersome.
In addition to the above scroll and page up and down functionalities, in the known electronic whiteboard system, there is also provided a functionality for incrementing or decrementing numerical data displayed in a counter
109
on the whiteboard
101
as illustrated in FIG.
3
. On a right-hand side of the counter
109
, there are displayed incrementing button
109
a
and decrementing button
109
b
. When the incrementing button
109
a
is pointed continuously or repeatedly by the pen-like member
104
, the count value is increased one by one.
In the known electronic whiteboard system, since the count value incrementing or decrementing button
109
a
or
109
b
has to be continuously or repeatedly pointed by the pen-like member
104
, a part of the displayed information might be continuously hidden by th
Nakagawa Masaki
Oguni Tsuyoshi
Chang Kent
Stevens Davis Miller & Mosher LLP
Tokyo University of Agriculture and Technology
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