JPH0375914A - Display device - Google Patents

Abstract

PURPOSE:To prevent the display from being hindered regardless of an explainer placed in the front of the display surface and to sufficiently display a picture even in a bright room by displaying the display output of a computer on a video display device as the picture. CONSTITUTION:A control computer 11 sends the display output to a video projector 12 as a video signal. The projector 12 transmissively projects the picture on a display screen 13. An observer brings a pen 15 into contact with a digitizer 14 provided on the surface of the display screen. An interface 16 detects the contacting position of the pen 15 by the signal from the digitizer 14 and sends it to the computer 11 as a signal. The computer 11 outputs the locus of the contacting position as the display output and sends it as a video signal while overlapping it on information displayed at this time. Thus, the display output is displayed on the display screen as if it were written with the pen 15, and the display screen 14has the same function as a blackboard.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to the use of computers in conferences, etc.
The present invention relates to a display device suitable as a blackboard system that displays image output on a large screen and allows additional input from the display surface.

BACKGROUND OF THE INVENTION Conventionally, in this type of blackboard system for conferences, the video output of a computer is displayed on a transmissive liquid crystal panel, and is projected onto a screen from the front using an overhead projector or the like for enlarged display. Furthermore, a digitizer is built into the screen, which detects the position of the pen by moving it across the screen, and the computer displays a display corresponding to the pen position, making it appear as if you are writing on the screen. The structure is designed to create a situation like this.

Problems to be Solved by the Invention However, in the above-mentioned conventional blackboard system, the enlarged display is projected onto the screen from the front, so if you stand in front of the screen to add notes on the screen, the display will be obstructed. There was a problem. Furthermore, the transmission type liquid crystal panel can display only white and black, and there is a problem that the environment in which the display is performed needs to be dark.

The present invention solves these conventional problems and provides a display device that does not obstruct the display even if there is a person in front of it, allows additional writing from the display surface, and is also capable of color display. This is the purpose.

Means for Solving the Problems In order to solve the above problems, the invention according to claim 1 includes a video display device for displaying images, a transparent digitizer disposed on the display surface of the video display device, and a transparent digitizer disposed on the display surface of the video display device and the digitizer. and a computer coupled to the computer.

According to a second aspect of the invention, the video display device is a large-screen video projector that is displayed from the rear.

According to a third aspect of the invention, the display surface of the video display device is a large-screen cathode ray tube.

According to a fourth aspect of the present invention, the digitizer comprises a pen that indicates a screen, and a position detection device that detects the indicated position of the pen.

Effects The present invention has the following effects due to the above structure.

In the invention described in claim 1, the display output from the computer is given to the video display device and an image is displayed on the display surface of the video display device. Therefore, even if a lecturer or the like is positioned in front of the display screen, the display will not be obstructed, and by adopting a video display device, it is possible to display in color, making it possible to display it even in a bright room. Become.

Furthermore, the displayed image is the image information of the combined computer, and by installing a transparent digitizer on the surface of the display screen, the touch position can be detected by touching the screen surface with a pen etc. while viewing the displayed information. However, by displaying an overlapping trajectory on the video information being displayed by the control computer, it is possible to write additional information on the display screen in the same way as writing on a regular blackboard, making it useful for presentations and discussions at meetings. Improve 5 ・＼
−/ Can be achieved.

EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a display device according to the present invention. In FIG. 1, reference numeral 11 denotes a control computer, which is connected to a video projector 12. As shown in FIG. 13 is a transparent display screen, 14 is a transparent digitizer installed on the surface of the display screen 13, 15 is a pen,
Digitizer 14 and pen 15 are connected to interface 16. Furthermore, the interface 16 is connected to the control computer 11.

FIG. 2 shows the detailed mechanism of the digitizer 14, in which 15 is a pen, 21 is a transparent digitizer board, 22 is a transparent resistor such as a Nesa film that is in close contact with the digitizer board 21, and 2
4 to 27 are connection points between the resistor 22 and a cable to be described later, 28 to 32 are cables, 34 is a contact position of the pen 15, and 35 is an interface.・＼
-/ Connected to Ace 35.

Next, the operation of the above embodiment will be explained. Control computer 11 sends the display output to video project 12 as a video signal. Video projector 12 projects an image onto display screen 13. At this time, since the projection is performed from the opposite side of the display screen 13 from the person viewing the display, the projection of the image is not hindered by the position of the viewer.

The observer performs actions such as bringing the pen 15 into contact with the digitizer 4 installed on the surface of the display screen and moving the pen 15 while in contact, as necessary. For such an operation, the interface 16 detects the contact position of the pen 15 based on a signal from the digitizer 14, and sends the contact position to the control computer 11 as a signal. The control computer 11 outputs the trajectory of the contact position as a display output, overlaps the information being displayed at that time, and sends it out as a video signal. As a result, the display screen is displayed as if it were written with the pen 15, and the display screen 71\-non 14 has the same function as a blackboard.

Next, a position detection method using the digitizer 14 used in this embodiment will be explained. In FIG. 2, a pen 15 connected by an interface 35 and a cable 28 contacts a transparent resistor 22 on a digitizer board 21. In FIG. Then, the interface 3 is moved around the contact position 34 of the pen 15.
Viewed from 5, (1) Interface 35 - Cable 28 - Pen 1
5 contact position 34 - connection point 24 - cable 29 interface 35 <2> Interface 35 - cable 28 - pen 1
5 contact position 34 - connection point 25 - cable 30 interface 35 (3) interface 35 - cable 28 - contact position 34 of pen 15 - connection point 26 - cable 31 - interface 35 (4) interface 35 - cable 28 - pen 1
5 contact position 34 - connection point 27 - cable 32 interface 35 are constructed, and the resistance value of each circuit changes depending on the distance between contact position 34 of pen 15 and connection points 24 to 27. The interface 35 calculates the absolute position of the pen 15 on the display screen 13 based on this resistance value and sends it to the control computer 11 as information.

Thus, according to the above embodiment, the display screen 13
The display output from the control computer 11 is enlarged and displayed,
It has the advantage that additional entries can be made freely on the display screen 13 using a pen 15 like writing on a normal blackboard, the display does not interfere with the display state, and it can be used even in a bright room.

Further, the additionally entered contents can be recorded in the recording device of the control computer 11 as the case requires, and operations such as creating a note copy by connecting a printer device or the like are also possible.

In the above embodiment, only writing on the screen with the pen 15 is described, but erasing is also possible, and furthermore, when writing, it is also possible to select the color of the pen and display the screen in color. Needless to say.

91\-7 Also, in the above embodiment, the detection of the contact position 34 of the pen 15 by the digitizer 14 is determined from the resistance value using the foil film resistor 22. There are methods of emitting vibrations and detecting the position based on the amount of attenuation at several detection points, and using two membranes to provide capacity, where the contact position 34 of the pen 15 is distorted by pressure and the distance between the membranes is It goes without saying that the same function can be achieved using any method, such as using a method that changes the capacitance due to a change in the pen, or detecting the pen position by arranging electrodes in a matrix. That's a good thing.

Furthermore, in the above embodiment, the enlarged display is performed using the video projector 12 to project the image from the back onto the display screen 13, but instead of these, a monitor television with a large cathode ray tube as the display screen may be used as is. Needless to say, there is no such thing.

Also, a control computer 11 and a video projector 1
By connecting 2 and a video display device such as a monitor TV using a 10 page data line, images can be transmitted electronically to a remote location, so it can also be applied to electronic conferences that connect remote locations. can.

Effects of the Invention As is clear from the above embodiments, the present invention enlarges and displays the display output of a computer in color, and uses a pen to display the enlarged display screen in the same manner as a general blackboard. It has the advantage of being able to perform entry operations,
It enables on-the-spot additions to materials presented during presentations and discussions at meetings, etc., and can also be sent by electronic mail to remote locations.Furthermore, screen information can be freely written in the same way as on a blackboard. This makes it possible to save information on a computer's storage device, making it extremely effective as a blackboard system for meetings and the like.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the overall configuration of a display device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing the configuration of a digitizer section in FIG. 1. 11 ”--7 11...Control computer, J2...Video flow controller, 13.Display screen, 14...Digitizer, 15...Pen, 16.35...Interface,
21... Digitizer board, 22... Resistor, 24~
27...Connection point, 28-32 cable, 34...Pen contact position

Claims (4)

[Claims] (1) A display device comprising: a video display device; a transparent decimating device installed on a display surface of the video display device; and a computer coupled to the video display device and the decimating device. (2) The display device according to claim 1, wherein the video display device is a transmissive screen and a video projector arranged on the back thereof. (3) The display device according to claim 1, wherein the display surface of the video display device is a large screen cathode ray tube. (4) The display device according to claim 1, wherein the decimating device comprises a pen that indicates the screen and a position detection device that detects the indicated position of the pen.