JP3134541B2 - Transparency machine for OHP - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an OHP transmissive machine that enlarges and projects an image from a computer or the like onto a screen using an OHP.

[0002]

2. Description of the Related Art There has been a conventional OHP transilluminator in which an extension unit having a function of storing images and the like can be connected to a basic unit having only a function of displaying images by connecting to a computer. The interface between the basic unit and the extension unit is provided separately.

[0003]

In the prior art described above, the interface with the extension unit must be considered at the stage of designing the basic unit, and the basic unit is used regardless of whether the extension unit is used or not. There was a problem that an interface with the extension unit had to be provided in advance.

The present invention has been made in view of the above problems, and relates to an OHP transilluminator for projecting an image of a computer onto a screen using an OHP. And an expansion unit connected to the computer and having functions of storing, synthesizing, and modifying images by connecting to the computer. The computer and the expansion unit are selectively connected to the basic unit by the same interface. This invention proposes an OHP transmissive machine having a mechanism.

[0005]

In the basic unit of the present invention, a computer for inputting image information and an expansion unit are connected by switching an interface for selecting and connecting.

[0006]

The present invention will be described with reference to the accompanying drawings. 1 is a system configuration diagram of a color OHP transflector to which the present invention is applied, FIG. 2 is a block diagram of a basic unit, and FIG. 3 is a block diagram of an extension unit. As shown in FIG. 1, the color OHP transmissive machine is mounted on an OHP 1, and has a basic unit 2 having only a function of inputting an image signal from a personal computer 3 and displaying an image, and a personal computer 5 Image equipment and video equipment 6 such as TV cameras and video tape recorders
Input image signal from the
It is composed of an extension unit 4 having a function of inputting / outputting an image with an external device and inputting / outputting a sound.

[0007] By connecting the extension unit 4 to the basic unit 2, image signals variously processed by the extension unit 4 can be input and displayed as images. The basic unit 2 is a small and low-cost device having only basic functions, and a high-performance system can be configured by connecting an expansion unit 4 having expansion functions. Here, one of the personal computer 3 and the extension unit 3 is switched to the basic unit 2 by attaching and detaching a connector.

As shown in FIG. 2, the basic unit 2 comprises a timing circuit 7 for controlling image input / output and a liquid crystal display 8, and the personal computer 3 or the extension unit 4
Circuit 7 receives analog RGB signals from
To display the image on the liquid crystal display 8 as an image. Further, the backlight 9 is attached to the basic unit 2 so that the display on the liquid crystal display 8 can be viewed without being placed on the OHP 1.

As shown in FIG. 3, the extension unit 4 includes an image synthesizing circuit 11 for synthesizing images of the personal computer 5 and the video equipment 6, a video memory 1 (13) for storing images, and an image for modification. A video memory 2 (14), an image modification circuit 12 for modifying an image in the video memory 1 (13) with an image in the video memory 2 (14), a timing circuit 10 for controlling image input / output, and an auxiliary storage device for storing the image 1
6. Voice input / output device 17 for inputting / outputting voice, remote controller 18 for performing operations, and CPU 15 for controlling the whole
And an image scanner 19 for inputting an image of an original or the like, and a printer 2 for performing a hard copy of the image.
0, digitizer 21 for inputting pointing and handwriting on the screen, keyboard 22 for inputting characters, etc.
And an RS232C interface 23 for communicating with an external device.

An analog RGB signal from the personal computer 5 is synthesized with an NTSC video signal from the video device 6 by an image synthesizing circuit 11 if necessary, and stored as an image in the video memory 1 (13) by the timing circuit 10. The image stored in the video memory 1 (13) is output to the basic unit 2 as the same analog RGB signal as in the personal computer 3.

The image stored in the video memory 1 (13) can be stored in the auxiliary storage device 16 by the CPU 15 or output to the printer 20. Conversely, an image stored in the auxiliary storage device 16 or an image from the image scanner 19 is read out by the CPU 15 and
(13) and output to the basic unit 2 by the timing circuit 10. Also, the digitizer 21
The CPU 15 uses the cursor, handwritten lines, and messages such as operation menus obtained based on the position information input from the CPU 15 as images as well as characters input from the keyboard 22 or the RS232C interface 23 as an image.
When the information is written in (14), the image can be displayed by being superimposed on the image stored in the video memory 1 (13) by the image modification circuit 12. Further, the sound input / output device 17 can store the sound together with the image in the auxiliary storage device 16 or, conversely, can read the sound from the auxiliary storage device 16 and output the sound together with the image.

[0012]

According to the present invention, in an OHP transflector, the basic unit can be designed independently of the extension unit, and the basic unit does not need to have a dedicated interface with the extension unit. The size and cost of the basic unit can be reduced. Furthermore, since the extension unit has various functions related to images and sounds, it can be effectively expressed in presentations, conferences, education, and the like.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a color OHP translucent machine.

FIG. 2 is a block diagram of a basic unit.

FIG. 3 is a block diagram of an extension unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 OHP 2 Basic unit 3 Personal computer 4 Expansion unit 5 Personal computer 6 Video equipment 7 Timing circuit 8 Liquid crystal display 9 Backlight 10 Timing circuit 11 Image synthesis circuit 12 Image modification circuit 13 Video memory 1 14 Video memory 2 15 CPU 16 Auxiliary storage device 17 Voice input / output device 18 Remote controller 19 Image scanner 20 Printer 21 Digitizer 22 Keyboard 23 RS232C interface

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-127863 (JP, A) JP-A-4-353898 (JP, A) JP-A-4-232992 (JP, A) JP-A-1- 316791 (JP, A) JP-A-1-105921 (JP, A) JP-A-3-253888 (JP, A) JP-A-4-113391 (JP, A) JP-A-61-66493 (JP, A) JP-A-3-167595 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/00-1/00 108 H04N 5/262-5/28 G03B 21/132 G03B 21 / 56-21/64 G09G 5/00-5/42 G06T 1/00 G06T 11/60-13/00 G06T 15/70 G06T 17/40-17/50

Claims (1)

(57) [Claims] The present invention relates to an OHP transflector for projecting an image of a computer onto a screen using an OHP, and a basic unit having only an image display function connected to a computer, and a basic unit connected to the computer. OHP transposition, comprising an extension unit having functions of storing, synthesizing and modifying images, wherein the computer and the extension unit have a mechanism selectively connected to the basic unit through the same interface. Machine.