JPH04323631A - Overhead projector device provided with cold cathode-ray tube - Google Patents

Abstract

PURPOSE:To project momentary information such as a moving picture and information with high expressing power such as a natural picture. CONSTITUTION:The overhead projector device consists of a personal computer 1 consisting of a CRT a2, a control part 3, and an input part 4, an OHP 6 consisting of a CRT b7 and a lens 8, a screen 9, a video processor 10, and a VTR 11, and the personal computer 1, OHP 6, a video processor 10, and the VTR 11 are connected by a video interface 5; and the video output of the personal computer 1 and the video output of the VTR 11 are inputted to the video processor 10 having a mixing and layout function of video signals and the edited video signal is inputted to the OHP 6 through a video interface 5. Then the signal is displayed on the CRT b7 and projected on a screen 9 through the lens 8.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an overhead projector (Over Head Projector).
Regarding OHP (hereinafter abbreviated as OHP), in particular, OHP equipment is an overhead projector with a cold cathode discharge tube (OHP with a Cathode Ray Tube) that displays the output of general video equipment including personal computers on a screen.
(hereinafter abbreviated as OHP device with CRT).

0002

[Prior Art] Conventional OHP devices have the function of placing a handwritten or printed OHP sheet on a glass stand and projecting the contents of the OHP sheet onto a screen through a lens by shining light from below. have.

0003

[Problems to be Solved by the Invention] As mentioned above, conventional OHP devices use a method in which an original is created by handwriting or printing on an OHP sheet, and then projected with a lens by shining a light on it. The disadvantage is that it cannot project highly expressive information such as natural information or natural images.

An object of the present invention is to provide an OHP with a CRT,
By connecting to general video equipment, including personal computers, using a video interface, and making it possible to project the video output of the video equipment onto a screen using a CRT, the above drawbacks can be solved, and instant information such as moving images and natural images can be displayed. An object of the present invention is to provide an OHP device with a CRT capable of projecting highly expressive information such as the following.

[0005]

[Means for solving the problems] OHP with CRT of the present invention
The device includes a video interface that inputs and outputs data to and from general video equipment including personal computers, and a CRT that displays video signals from the video interface, such as moving images, still images, character screens, or a combination of these.
and a projection lens for projecting the CRT video signal onto a screen.

[0006]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an OHP with CRT according to an embodiment of the present invention.
It is a block explanatory diagram of an apparatus.

In FIG. 1, an OHP with a CRT of this embodiment is shown.
The apparatus is composed of a personal computer 1 consisting of a CRTa 2, a control section 3, and an input section 4, an OHP 6 consisting of a CRTb 7 and a lens 8, a screen 9, a video processor 10, and a VTR 11. and OHP6 and video processor 10 and V
It is connected to the TR 11 through a video interface 5.

Here, the video output of the personal computer 1 and the video output of the VTR 11 are input to a video processor 10 having video signal mixing and layout functions, and the edited video signal is sent to the OHP 6 via the video interface 5. input. Then CR the signal
The image is displayed on Tb7 and projected onto a screen 9 through a lens 8. As a result, a highly expressive image that is a mixture of the display of text information from the personal computer 1 and the moving image or natural image from the VTR 11 is projected onto the screen.

In this embodiment shown in FIG. 1, an image of a sales table is displayed on the CRTa 2 by the control section 3 by operating the input section 4 of the personal computer 1. The image of this sales table is then displayed on the screen 9 by the OHP 6.

[0011]

As explained above, the OHP device with a CRT of the present invention is equipped with a CRT in the OHP, is connected to general video equipment including a personal computer through a video interface, and connects the video output of the video equipment to a screen using the CRT. By being able to project onto the screen, it is possible to project instant information such as moving images and highly expressive information such as natural images.

[Brief explanation of drawings]

FIG. 1 is a block diagram illustrating an OHP device with a CRT according to an embodiment of the present invention.

[Explanation of symbols]

1 Personal computer 2 CRTa 3 Control section 4 Input section 5 Video interface 6 OHP 7 CRTb 8 Lens 9 Screen 10 Video processor 11 VTR

Claims (1)

[Claims] 1. A video interface for inputting and outputting data to and from general video equipment including a personal computer; moving images and still images from the video interface;
An overhead projector with a cold cathode discharge tube, characterized in that it has a cold cathode discharge tube that displays a character screen or a video signal of a combination thereof, and a projection lens that projects the video signal of the cold cathode discharge tube onto a screen. Device.