JPH0194423A - Display device - Google Patents

Abstract

PURPOSE:To obtain a display with high resolution by constituting the display so that a signal from a handwriting detecting means can be directly outputted to a displaying monitor. CONSTITUTION:When a nib 8 of writing materials presses a front film 6A, upper and lower films 6A and 6B touch each other, and currents I1, I2, I3, and I4 are caused to flow through respective electrodes. For I1 and I2, and I3 and Id4, the currents are supplied from a constant current source 10, and moreover, when the resistance value of a conductive film 6 is uniform, and the distances from the respective vertical and horizontal electrodes of a point on which the nib 8 presses a board 3 are made into Y1, Y2, X3, and X4, expressions I and II can be established, the positions Y1, Y2, X3, and X4 can be obtained, and the position of a pen can be calculated. Once this value is obtained, it is sufficient to display and process the points of X and Y on the screen of the displaying monitor in the same way as the mouse input of a personal computer, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is a display family [K
It is related to

[Conventional technology]

FIGS. 4 and 5 illustrate the conventional general use of display devices and input devices.

111, (Ila display monitor 111 display means, (21) a video camera that projects an image on this display monitor 111, (3) this video camera (2)
) This is the display surface that is a blackboard (whiteboard) that is photographed.

Next, the effect will be explained. In a room that accommodates a large number of people (for example, a classroom), when a person uses a blackboard (3) to give a lecture in front of a large number of people, the blackboard 131 The blackboard (3) is photographed by a television camera (2) and the image is displayed on the display monitor 111 so that the blackboard (3) can be seen by the person.

[Problem that the invention seeks to solve]

Conventional equipment is configured as described above, and because of the low resolution of a normal TV camera and 11,300 lines and 200 lines vertically, small letters written on a blackboard, graphic line display, etc. There was a problem that it was not possible to

This invention was made to solve the above-mentioned problems, and its object is (1) to provide a display device that can display even small characters and figures on the display.

[Means for solving problems]

The display device according to the present invention is provided with a handwriting detection means on the surface of a blackboard (whiteboard), and uses signals from the detection means to convert figures and characters into electrical signals, which are then directly displayed on a display monitor. Out.

[For production]

This invention is composed of a handwriting detection section, a signal processing section and a display section, and displays handwritten characters and figures.

[Implementation sequence of the invention]

Hereinafter, one embodiment 91I of this invention will be explained with reference to the drawings.

In FIGS. 1 to 3, (l) is a display monitor, and (4) is a signal processing means for outputting a signal to the display monitor (1). The signal processing device t+51 is a handwriting detector, in this case, a conductive resistor 11161i is attached to the next whiteboard, 16) is a conductive resistive film (3) is a whiteboard, (7) is a spacer, (8) is the nib of a writing instrument. And (6A) is the front (upper) membrane, (6B)
is the intervening (lower) membrane. Also, whiteboard (3),
A detection means (9) is constituted by a resistive film (6), a spacer (7), and a pen tip (8) of a writing instrument. The current source is a constant current source.

Please note that the other configurations are the same as before.
1t - omitted.

The two conductive films (6) pasted on all the songs on the whiteboard have many small spacers (7) arranged between them, and Vk (6A) on the front is shown at both vertical ends and between the two conductive films (6). 6
In B), electrodes are attached to both ends of the upper and lower parts. Now, when the pen tip (8) of the writing instrument presses the front membrane (6A), the upper and lower membranes (6A) (6B) come into contact, and a current of 11+ I4 I3. I4 is played. Engineering 0. Engineering 2 and I3. I, is constant'#
The entire current is supplied from the ttILfIA (transfer), and the resistance value of the conductive film (6) is uniform, and the electric current from the vertical and horizontal electrodes at the point where the pen tip (8) presses the board (3) is If the distance is YZ + Yz + Xs + "4, then the formula (1
), equation (2) holds, and the place t! e yl, y2. X
3. By finding X4, the position of Shiben can be calculated.

Once this value is determined, all that is left to do is to display the XY points (i.e., characters and figures as a set of points) on the screen of the display monitor (1) in the same way as a mouse input card on a personal computer.

In the above embodiment, a pressure-sensitive conductive resistive film detection method is used as the handwriting detection device, but an electrostatic or optical detection device may also be used.

Further, in the above embodiment, the case where there is one display unit (display monitor) is shown, but there may be any number of display units (how many locations), and the same effect as in the above embodiment η can be achieved.

〔Effect of the invention〕

As described above, according to the present invention, since the handwriting, the detection signal, and the signal from the means are directly output to the display monitor, it is possible to obtain a display device with high resolution.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of a display device according to an embodiment of the present invention, FIG. 2 is a principle diagram of the detection section in FIG. 1, FIG. 3 is a partially enlarged view of the detection section, and FIG. Fig. 5 is a conceptual diagram of a conventional display device, in which Fig. 4 shows a monitor and a video camera;
The diagram is a whiteboard. In the figure, (1) the display unit of the company's display monitor, (2) the video camera, (3) the whiteboard which is the display surface, (4) the signal processing device, and (5) the handwriting detector. (6) is a conductive film that is a handwriting detector, (7) is a spacer (8) is a pen tip of a writing instrument, and (9) is a detection means. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A display surface on which characters and figures are entered and displayed using a writing instrument, a detection means for detecting the handwriting written on this display surface, and the handwriting of the above-mentioned characters and figures detected by the detection means is inputted, processed, and outputted as a signal. A display device comprising: a signal processing means for processing the signal; and a display means for displaying the output from the signal processing means on a screen.