JPS58163039A - Remote indication input device - Google Patents

Abstract

PURPOSE:To enable an indication input of high accuracy to a large-sized video screen, by using a remote indication input device for video screen. CONSTITUTION:An output screen given from a computer system 8 is projected to a video screen 2, and this projected screen forms a focal point at a photoelectric converting element 5 through a lens system 4 of an indication input part 3. A raster image is formed on the screen 2, and the element 5 detects periodically the raster at a point 6 on the screen 2. Then the coordinates of the point 6 is calculated by comparing phases with each other between the signal obtained from detection of the raster and a video synchronizing signal. Then the processes including increment of luminance at the point 6, etc. are carried out through the system 8. Thus it is possible to know the point 6 on the screen 2 indicated by the part 3 and then supply it to the system 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote instruction input device for a video screen that inputs the coordinate values of a point on a refresh-type CRT screen by pointing from a distance on the screen. .

Conventionally, an input device for a video screen on which a CRT screen is enlarged and projected is composed of a magnet and a magnetic field sensor, which has the disadvantage of causing a large amount of damage to the device and having low accuracy of indication. In addition, a light pen is used as a device for pointing and inputting points on a CRT screen by holding it close to the screen, but CRT screens are easily tiring when viewed for long periods of time, and are used by a large number of people in meetings etc. The disadvantage is that it is inconvenient when doing so.

In order to eliminate these drawbacks, the present invention uses an optical system to form an image of the video screen at a point away from the video screen, and a photoelectric conversion element for light reception or a photoelectric conversion element is placed at a point on the image. The light receiving end of the optical fiber coupled to the conversion element is placed so that the coordinates of the video screen can be detected from the phase difference between the synchronizing signal of the video output and the raster signal on the photoelectric conversion element. The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention, in which 1 is a video projection device, 2 is a video screen, 3 is an instruction input section, 4 is a lens system of the instruction input section 3, and 5 is a photoelectric device for receiving light. The conversion element 6 is the point on the video screen 2 where the cursor pointed by the instruction input section 3 appears. Further, γ is an input interface, 8 is a computer system, 9 is a video interface, and 10 is necessary equipment such as a communication device of the computer 1 through which input is performed as necessary.

K, which operates this, performs this as follows.

The output screen from the computer system 8 is transferred from the video projection device 1 to the video screen 2 via the video interface 9.
The projected screen is focused on the photoelectric conversion element 5 through the lens system 4 of the instruction input section 3. The image on the video screen 2 is a raster image similar to a refresh type CRT, and the photoelectric conversion element 5
, the raster at point 6 of video screen 2 can be detected periodically. By calculating the coordinates of the point 6 on the video screen 2 from a phase comparison between the raster detection signal and the video synchronization signal, and performing processing such as increasing the brightness of that point using the computer system 8,
The point 6 on the video screen 2 pointed to by the instruction input unit 3 can be known and input into the computer system 8 .

With the above method, it is possible to input data to the video screen 2 with a simpler configuration and with higher accuracy than with a device using a magnet and a magnetic field sensor. It also has the advantage of being easier on the eyes and can be used by a large number of people than light pens. Note that the present invention can of course be used as a remote instruction input device for not only the video screen 2 but also a CRT screen.

FIG. 2 is a diagram showing another embodiment of the present invention, in which 11 is an optical lens system, and 12 is a glove, the optical lens system 11 being attached to the tip of the index finger. Reference numeral 13 denotes an optical fiber, the light receiving end of which is placed at the focal point of the optical lens system 11.

14 is a photoelectric conversion element provided on the input interface T side.

The above optical lens system 11. Optical fiber 13. The instruction input section 3 is composed of the photoelectric conversion element 14 and the photoelectric conversion element 14 . The photoelectric conversion element 14 is connected to the optical fiber 13 by an optical system using, for example, a self-focusing optical fiber, and is incorporated into the index finger portion of the glove 120, and the photoelectric conversion element 14 is connected via the optical fiber 13 to an input interface. The configuration is such that the information is input to the computer system 8 through the computer 7. The operating principle is the same as that shown in Figure 1, but it has the advantage of allowing remote command operations to be performed using the natural motion that humans normally use, ``pointing with the r finger''.

As explained above, by using the remote instruction input device for video screens of the present invention, it becomes possible to input instructions with high precision to a large video screen.
By combining voice recognition technology, the man-φ-machine interface can be performed separately from the space, which has great advantages in management decision support and when display output and input are shared by a large number of people, such as on a CRT. In addition, a device using an optical fiber for the instruction input section has the advantage that it is easy to wear a glove or fingertip, and remote instructions can be given with natural movements.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the structure of an apparatus showing one embodiment of the invention, and FIG. 2 is a schematic diagram of the structure of an apparatus showing another embodiment of the invention. a transducer element, 6 a point on the video screen pointed to by a remote instruction input device, T an input interface, 8
1 is a computer system, 9 is a video interface, 10 is necessary equipment such as a communication device for the computer 1 to which input is performed as necessary, 11 is an optical lens system, 12 is a glove, 13 is an optical fiber, and 14 is a photoelectric conversion element. .

Claims (3)

[Claims] (1) In a device for projecting an enlarged image onto a video screen using a video projection device, an instruction input section includes a photoelectric conversion element for receiving light at the focal point of an optical lens system, a synchronization signal of the video output of the video projection device, and a synchronization signal of the video output of the video projection device. A remote instruction input device comprising means for detecting coordinates of the video screen from a phase difference with a raster signal on a photoelectric conversion element. (2) A device for projecting an enlarged image onto a video screen using a video projection device, comprising: an instruction input section in which a light receiving end of an optical fiber coupled to a photoelectric conversion element for light receiving is arranged at the focal point of an optical lens system; A remote instruction input device comprising means for detecting coordinates of the video screen from a phase difference between a synchronizing signal of the video output of the device and a raster signal on the photoelectric conversion element. (3) The remote instruction input device according to claim (2), wherein the optical lens system is attached to the tip of the index finger of the glove.