JPS5810232A - Light pen for crt displaying device - Google Patents

Abstract

PURPOSE:To make an input work using a light pen easy, by reflecting a photodetecting point of the light pen with a light from a light emitting element equipped in the light pen and easily and optically recognizing the photodetecting point. CONSTITUTION:An optical beam 5 emitted from a pen tip 2 is touched on a CRT displaying part 4 and reflected at the point. The reflected light becomes a dispersed light and the position of the displaying part 4 is informed to an operator. The photodetection of the light pen stops the light illumination of the light pen with a signal from a switch detecting the touch of the pen tip 2 on the CRT screen and is performed by receiving light on a fluorescent screen of the position of the CRT displaying part 4, separately from the reflected light entirely. The pen tip 2 of the light pen is incontact with a CRT display screen 3 and is directed to the plane 4. A light 5 of a light emitting element 7 of the light pen is reflected and dispersed. A light 6 illuminated from the fluorescent screen is received on a photodetection section 8 of the light pen.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to light pen manual devices, and more particularly to light pens for OR, T display devices.

Conventionally, this Yuzu light pen input device was used by pressing it against the cathode ray tube of the CR'I'' display device, so due to the thickness of the cathode ray tube, the position where the light pen was pressed against the CRT display surface was limited to the tube part operator. 1ll11
, will be in front. For this reason, the operator must imagine the point of light to be received at a position that is the thickness of the tube beyond the tip of the light pen, which is physically invisible, and this has the disadvantage that it requires skill to manually place it in the correct position. 〇An object of the present invention is to reflect the light receiving point of the light pen, which is being manually operated by the light pen, with the light from the light emitting element installed inside the light pen when the light pen is pressed against the display surface of the light pen 2CR/T, so that the operator can C) To provide a light ben for a LT display device, which eliminates the above-mentioned drawbacks and facilitates manual work with the light ben by making it possible to easily determine the light-receiving point optically.

According to the present invention, the light receiving point on the display surface, which is physically invisible beyond the tube thickness, is realized by adding a light emitting element to the conventional light vane that only receives light, and by applying a source to reflect the light. It looks optical.

You can get a light pen made from sea urchin.

Next, the present invention will be described in detail with reference to the drawings of an embodiment of the present invention. FIG. 1 is a diagram showing that the light pen is applied to all of the cathode ray tubes, and the light pen main body 1 has a built-in light emitting element, a light receiving element, and a switch that detects that the pen tip is pressed against the entire cathode ray tube. The nib 2 of the light pen is in contact with the cathode ray tube surface 3. The light beam 5 emitted from the nib 2 of the light pen passes through the CRT glass tube without being reflected and is applied to the CRT display section 4.
It is reflected at the position of The reflected light becomes dispersed light and informs the operator of the position of the display section 4.

When the light pen's light is received by pressing the pen tip 2 of the light pen that is in contact with the CRT screen, the light pen stops emitting light due to a signal from the switch that detects the pressing, and is completely separate from the reflected light. , is performed by receiving the light emitted from the nine surfaces of the brown tube at the position of the CRTfi display section 4.

Figure 2 shows a cross section of a cathode ray tube with a light pen applied to it. The nib 2 of the light pen is in contact with the surface 3 of the cathode ray tube and the JCRTCRT display section is pierced. The light 5 emitted from the light emitting cord 7 built into the light pen becomes a beam and passes through the CRT glass.
The reflected light is reflected on the display section 4 and dispersed. On the other hand, the cathode ray tube display signal is combined with electrons 9 and hits the fluorescent surface of the CRT display section 4 to emit light. The emitted light 6 is the light receiving part 8 of the light pen.
The light is received by the controller and sent as a light reception signal to the control unit, where the position is detected. 10 indicates the thickness of the glass.

As explained above, the present invention provides a light pen with a light-emitting rod so that the light receiving point can be reflected as reflected light and can be viewed optically on a cathode ray tube.

This has the effect of allowing input operations using a light pen to be performed without error.

[Brief explanation of drawings]

Figure 1 shows how the light pen of the present invention is used, Figure 2 shows how the light pen of the present invention is used.
The figure shows the nib of the light pen of the present invention. In the figure, 1...Light Ben body, 2...
- Light pen nib, 3... Cathode ray tube surface, 4... CRT display section, 5... Emission beam, 6... Fluorescent surface emitting light , 7... Light emitting stringer, 8... Light receiving element, 9... Fluorescent surface display electron beam, 10... Glass. 5-

Claims (1)

[Claims] A light pen for a C RT' display device 0 characterized by comprising a light emitting element provided at the pen tip, a light receiving element provided at the pen tip, and a switch for controlling light emission of the light emitting element.