Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
1999-05-03
2002-08-27
Hjerpe, Richard (Department: 2674)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S156000, C345S172000, C345S174000, C345S179000, C345S178000, C178S018010, C178S018030, C178S018050
Reexamination Certificate
active
06441807
ABSTRACT:
This application is the national phase under 35 U.S.C. §371 of PCT International Application No. PCT/JP98/03961 which has an International filing date of Sep. 3, 1998, which designated the United States of America.
TECHNICAL FIELD
The present invention relates to an electronic-blackboard type display system which transfers information, written onto an information input surface of a sheet member with a marker pen, to a controller such as a personal computer substantially concurrently with the writing of the information to present the information on a monitor. The information is stored in a memory, and the information is printed out on a printer. The present invention also relates to a display system which transfers information, input through pressure with an inkless pressure pen on the sheet member used as a projection screen, to the controller while projecting the input information on the screen through a projector connected to the controller.
BACKGROUND ART
FIG. 15
shows a conventional electronic blackboard display system that transfers information, written with a marker pen as a writing and pressuring instrument, to a personal computer to display, and stores and prints out the information.
Referring to
FIG. 15
, a pressure input unit
101
with a writing and erasing function is designated
101
, and is constructed as shown in more detail in FIG.
16
. Specifically, the pressure input unit
101
is composed of a top sheet
101
A, an insulating frame
101
B, a bottom sheet
101
C, and a reinforcement board
101
D.
The top sheet
101
A is constructed of a plastic film that is surface treated to enable a marker pen to write and erase information thereon, and the rear surface of the plastic film is coated with a carbon resistor film. The bottom sheet
101
C is constructed of a plastic film as a base material, and the surface of the plastic film is coated with a carbon resistor film. The pressure input unit
101
is constructed by gluing the two plastic sheets
101
A and
101
C together with the insulating frame
101
B interposed therebetween, and by gluing the reinforcement board
101
D to the bottom sheet
101
C from its rear side.
The marker pen writes on and presses the top sheet
101
, causing the carbon resistor film of the top sheet
101
beneath the pressed portion to connect to the carbon resistor film of the bottom sheet
101
C, thereby providing position data corresponding to the position of the pressed portion. The pressure input unit
101
is called a resistor film, pressure sensitive touch panel as one type of position coordinate detecting means.
When a character or the like is written on the top sheet
101
of the pressure input unit
101
constituting the position coordinate detecting means, already described in
FIG. 15
, using a marker pen, the position data produced at the pressed portion is converted into digital data by position data converter
102
. The digital data, as written information, is successively transmitted to a personal computer
104
via data transfer device
103
.
The personal computer
104
presents the written information on a monitor, and stores it in a memory, and prints outs it on a printer as necessary.
In this system, the visible information written on the pressure input unit
101
is presented, stored and printed on the personal computer
104
substantially on a real-time basis, and may be furthermore transmitted to a remote place.
FIG. 17
shows a conventional projection system in which the handwriting stroke information, created by a pressure pen on a screen, is transmitted to a computer so that the handwriting stroke information is projected on a projection screen by a projector.
In this conventional art, a screen
105
A is integrally formed with a pressure input unit
105
, on which no inked information is written by a marker pen. Specifically, the screen
105
A is constructed of a material on which a projector
106
can project a video. Any material is acceptable as long as it transfers a pressure, applied by a pressure pen, to position coordinate detecting means (not shown) of the pressure input unit
105
. The position coordinate detecting means on the pressure input unit
105
can be constructed of a resistor film and pressure sensitive touch panel, for example, like the above-described pressure input unit
101
.
FIG. 17
shows a conventional projection system in which the handwriting stroke information, created by a pressure pen on a screen, is transmitted to a computer so that the handwriting stroke information is projected on a projection screen by a projector.
In this conventional art, a screen
105
A is integrally formed with a pressure input unit
105
, on which no inked information is written by a marker pen. Specifically, the screen
105
A is constructed of a material on which a projector
106
can project a video. Any material is acceptable as long as it transfers a pressure, applied by a pressure pen, to position coordinate detecting means (not shown) of the pressure input unit
105
. The position coordinate detecting means on the pressure input unit
105
can be constructed of a resistor film and pressure sensitive touch panel, for example, like the above-described pressure input unit
101
.
The operation of this projection system is generally discussed. When a character or the like is written on the screen
105
A of the pressure input unit
105
constituting the position coordinate detecting means, using a pressure pen, the position data produced at the pressed portion is converted into digital data by position data converter
102
in the same manner as in the preceding system. The digital data, as written information, is successively transmitted to a personal computer
104
via data transfer device
103
.
A personal computer
104
presents the written information on its monitor while transmitting it to a projector apparatus
106
constructed of a liquid-crystal projector to present the information on a screen
105
A.
The written information is projected exactly in the same strokes along which the pressure pen moves on the screen
105
A. This gives an impression that the information is actually written on the screen.
The above conventional display system is very useful in a video teleconference system or the like, because the written information and handwriting stroke information are transferred to the personal computer
104
substantially on a real-time basis.
In the electronic blackboard such as the one shown in
FIG. 15
, only one surface on the top sheet
101
serves as an information input surface. To proceed with a conference further after transferring the information written on the input surface to the personal computer
104
for storage, the information written on the top sheet
101
needs to be erased. Conference participants may want to return to a previous issue after the erasing of the information, but no means is available to reproduce the written information stored in the personal computer
104
on the pressure input unit
101
(top sheet
101
A). This inconveniences users very much.
Since the ability to fully diffuse light is required of the screen
105
A in the projector system shown in
FIG. 17
, the top sheet
101
provided with the write and erase functions only, shown in
FIG. 15
, is not employed, as is, for the screen
105
A.
Since the screen
105
A itself constitutes the position coordinate detecting means as shown in
FIG. 17
, the black color of the carbon resistor film coating on the rear surface thereof is seen through from the front. Viewers may find it uncomfortable. If the screen
105
A is thickened to eliminate such a drawback, more force is required to use a pressure pen in handwriting. This inconveniences users in handwriting.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a display system which prevents the resistor film of the position coordinate detecting means from being seen through from the front of the sheet member to free the viewers from the irritation of the black carbon resistor film.
It is another object of the present invention to provide a
Hjerpe Richard
Plus Industrial Corporation
Zamani Ali
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