JPH03172063A - Picture magnification projection display device - Google Patents

Abstract

PURPOSE:To present a picture magnification projection display device, which can execute the edition of a document, at low cost by providing a projection part to change transmissivity or a scattering rate according to an electric signal to read the picture of the document, to modulate a space from a light source and to project the picture, and a means to store read picture information into a storage, to read out the picture and to project it. CONSTITUTION:The document picture, which is converted to digital picture information by a picture reading means 1, is stored in a main storing means 3. The stored digital picture information receives a desired edition processing, which is desired by a presenter, in a picture processing means 4 and is supplied to a magnification projection liquid crystal display means 6. The magnification projection liquid crystal display means 6 forms a positive picture by liquid crystal based on the picture information and projects it on a screen while enlarging it by the low-priced liquid crystal display in comparison with a CRT, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image enlargement projection display device, and particularly to an image enlargement projection display device for efficiently giving presentations at conferences and the like.

[Prior Art] Various optical and electronic devices have been developed for making presentations using documents at conferences and the like.

Among these optical and electronic devices, typical devices include:
Television devices using an overhead projector (OHP) and a CRT are known. In an overhead projector, an original document to be presented is first transferred onto a special transparent film. Then, for presentation (4), this transparent film is placed on the main body of the device that has a built-in light source, and the projected light from the light source is deflected by a mirror installed at the top of the main body and projected onto the screen in an enlarged manner. It is something.

Furthermore, in a television device, a document is photographed by a television camera, projected onto a high resolution CRT, and then enlarged and projected.

[Problems to be Solved by the Invention] However, in presentations using an overhead projector, it is necessary to prepare a special transparent film on which a document is transferred in advance before the presentation, which is inconvenient and does not require the use of this transparent film. Since they are disposable, there is a problem that increases operational costs.

In addition, in television equipment, documents are converted into electrical signals using a television camera, making it possible to perform various types of dual-image processing, but the CRTs used are expensive, and the equipment is large-scale, so it is difficult to use it for convenience. The problem was that I couldn't do it.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to enable document editing, such as projecting multiple enlarged documents on a screen as necessary, or cutting out and enlarging a part of a document. An object of the present invention is to provide a large and inexpensive image enlargement projection display device and to enable efficient presentations.

[Means for Solving the Problems] In order to achieve the above object, an image enlargement projection display device of the present invention includes an image reading unit that converts an image of a document or the like into an electrical signal, and a transmittance that is determined by the read electrical signal. It is characterized by having a projection unit that spatially modulates and projects the light from the light source by changing the scattering rate, and a means for converting the read image information into a digital signal, storing it in a storage device, reading it out, and projecting it. That is, as shown in the block diagram of FIG. 1, the present invention comprises an image reading means 1 for reading a desired image as digital image information, a main storage means 3 for storing this digital image information, and An image processing means 4 for editing the stored digital image information, a display storage means 5 for storing the cotton fruit image information edited by the image processing means 4, and a display storage means 5 for storing the cotton fruit image information edited by the image processing means 4; It is characterized by comprising an enlarged projection liquid crystal display means 6 which forms a positive image to be applied to the edited image information on a liquid crystal, modulates the intensity of light from a light source using the formed positive image, and projects it on a screen in an enlarged manner. , human output of news to each of these means is performed via the image control means 2.

[Sakukawa]

The image enlargement projection display device of the present invention has the above configuration, and the document image converted into digital image information by the image reading means is stored in the main storage means.

The stored digital image information is then subjected to a desired editing process intended by Brezenter in the image processing means, and then supplied to the enlarged projection liquid product display means.

Then, the enlarged projection liquid crystal display means forms a positive image on a liquid crystal display based on the image information supplied by a liquid crystal display, which is cheaper than a CRT or the like, and enlarges and projects the positive image onto a screen.

The refresh operation when forming a positive image on a liquid crystal display is performed by storing edited image information in the display storage means and repeatedly supplying the edited image information from the display storage means.

[Embodiments] Hereinafter, preferred embodiments of the image enlargement projection display device according to the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of the configuration of this embodiment. The image reading means is composed of a scanner 10 and a binarization circuit 12,
A scanner 10 reads a document image to be enlarged and projected and photoelectrically converts it. The resolution of this scanner 10 is 8 dots/mm in consideration of normal Bunkichi documents.
A certain degree is fine.

The document image information read by the scanner 10 is converted into a white or black binary signal by the binarization circuit 12 and converted into digital image information. Furthermore, this digital image information is input to an image control circuit 14 that controls the main image enlargement projection display device.

The image control circuit 14 compresses the input digital image information through an image compression/decompression circuit 16 and stores it in the main storage device 18 . The maximum storage capacity of this main storage device 18 is 10
About M byte is enough, IM bit or 4M bit D
R A M (Dynamic Ra-ndolIA
It can be configured with an LSI memory such as an LSI memory (access memory), and can store digital image information of several types of documents continuously read by the scanner 10 in nth order.

Then, the digital image information stored in the main storage device 18 is processed by the two-image compression/expansion circuit 16 for image 1g! elongated, i1l+
It is manually inputted via the single image control circuit 1ii+ path 14 to an image enlargement/reduction circuit 20 and a both image cutting circuit 22 as image processing means. Both image enlargement/reduction circuits 20 receive f from the image control circuit 14.
f;I7 is a circuit for manually enlarging or reducing digital image information, and the image cutting circuit 22 is a circuit for editing a part of the digital image information input by a control signal from the image control circuit 14. This is a circuit that extracts and edits.

The digital image information that has been subjected to desired editing processing in the image scaling circuit 20 or the image cutting circuit 22 is further stored in a refresh memory 24 serving as display storage means. The edited digital image information stored in the refresh memory 24 is repeatedly supplied at predetermined intervals to a liquid crystal display 28, which will be described later, according to a control signal from the image control circuit 14. 28 refresh operations are performed.

The liquid crystal display 28 is composed of a transparent liquid crystal material sealed between transparent electrodes, and the transparent electrodes and the transparent liquid crystal material are] 00
Each pixel is divided into about 0x700 small areas. Then, the edited digital image information is repeatedly supplied from the refresh memory 24 to the transparent electrode of each pixel, and the molecular arrangement of the liquid crystal molecules enclosed changes to change the transmittance or scattering rate of each pixel. It functions as a spatial intensity modulation filter. A projection light source 26 and a projection lens 30 are arranged at the rear and front of the liquid crystal display 28, respectively, and constitute enlarged projection liquid crystal display means.

The image enlargement projection display apparatus in this embodiment is roughly constructed as described above, and when a presentation is to be made using this apparatus, the presenter places a document to be enlarged and projected on a predetermined mounting surface of the scanner 1o. Then, the scanner 1o reads the placed document image, and the read image information is binarized by the binarization circuit 12 and stored in the main storage device 14.

To enlarge and project the stored document image onto the screen 32, the operator operates the operation panel 34 connected to the image control circuit 14 and sends an operation signal to the image control circuit 14. The image control circuit 14 outputs a desired digital image ↑1'? from the main storage device 18 in response to the received operation signal. The information is read out and written to the refresh memory 24. and,
Desired digital image information is repeatedly supplied from this refresh memory 24 to the liquid crystal display 28.
The transmission or scattering rate of each pixel changes to form a positive image. Then, the intensity of the projected light from the light source 26 placed at the rear of the liquid crystal display 28 is modulated by this positive image.
A desired image is enlarged and projected onto the screen 32.

Note that in order to simultaneously project a cursor as a marker for indicating a desired part of the enlarged and projected document image, a cursor control circuit 36 and this cursor control circuit 3 that control generation and movement of the cursor are provided as shown in FIG.
An arithmetic circuit 38 is provided to superimpose the cursor generated in step 6 on the projected image, and the image control circuit 14 controls the cursor control circuit 36 by an operation signal from the operation panel 34 at hand.
By transmitting a control signal to the cursor, it is possible to project the cursor over the desired area.

When further enlarging a part of the projected document image, the Brezenter uses a cursor to indicate the part to be enlarged on the operation panel 34 at hand, and sends an enlargement operation signal to the image control circuit 14. The image control circuit 14 that has received this enlargement operation signal transmits a control signal to the image enlargement/reduction circuit 20. Image enlargement/reduction circuit 2 receiving the control signal
o reads out the digital image information read from the main storage device 18 and corresponds to the currently projected document image.
1, and further, the two-image cutting circuit 22 cuts out a desired part according to the control signal from the image system i3lI path 14, and writes it into the reflex memory 24. Then, the partially enlarged digital image information is newly supplied from the refresh memory 24 to the liquid crystal display 28, and the enlarged image specified by the cursor is projected in place of the currently shaded document image. It turns out.

When reducing a part of the stepped shadow image 1, it is sufficient to instruct the area to be reduced using the operation panel 34 at hand and send a reduction signal to the image control circuit 14, as in the case of enlargement.

The above has described the method of enlarging or reducing a type 1 document image and projecting it, but Kijo Shido's image enlargement projection display device can expand and project multiple types of document images at the same time. Can be done. That is, multiple documents prepared in advance by the presenter are successively read by the scanner 10, digitized, and sequentially stored in the main storage device 18. When simultaneously projecting multiple desired document images from multiple types of stored digital image information, multiple documents to be projected are selected using the operation panel 34 at hand, and a selection operation signal is sent to the image control circuit 14. do. Upon receiving the selection signal, the image control circuit 14 reads out digital image information corresponding to the selected document from the main storage device 18 and sends it to the image enlargement/reduction circuit 2.
Send image information and control signals to 0. The image enlargement/reduction circuit 20 reduces the received plurality of digital image information and writes it into the refresh memory 24 . Then, since a plurality of types of reduced digital image information are supplied from the refresh memory 24 to the liquid crystal display 28, a plurality of selected document images are projected onto the screen 32. Of course, the arrangement format of the plurality of types of document images to be projected can be determined as appropriate, and the format can also be determined such that a plurality of document images are displayed as icons at the edge of the screen 32 and selected with a cursor. Alternatively, a portion of multiple types of document images, for example, only the headings, may be cut out by the image cutting circuit 22 and enlarged and shaded.

In addition, a voice human power device 4o is connected to the image control circuit 14,
In addition, an audio signal storage device 42 for storing audio signals from the audio input device 4o may be provided, and the speaker 44 may be configured to output the audio as well as the document image.

Alternatively, it is also possible to connect a communication control circuit 46 to the image control circuit 14 and connect it to a presentation venue at another location via a communication line to enlarge and project a document image at another location.

First, a printer 4 outputs a hard copy of the projected image.
8 can be connected to the refresh memory 24, and in response to an operation signal from the 12ψ production panel 34, the collected digital image information stored in the printer 48 can also be transmitted from the refresh memory 24 to print the image. It is possible.

[Effects of the Invention] As explained above, according to the image enlargement projection display device according to the present invention, when giving a presentation using a document, it is possible to enlarge the document image with a simple operation.
It is possible to perform enlarged projection by performing editing processing such as reduction or so-called banning in which parts are cut out and arranged, and since the enlarged projection is performed using a liquid crystal display, the device can be configured at a low cost, so there is no overhead. Presentations can be made much more efficiently than conventional devices using projectors or CRTs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the structure of an image enlargement projection display device according to the present invention, and FIG. 2 is a block diagram of the structure of an embodiment of the image enlargement projection display device according to the present invention. 10... Scanner 12... Binarization circuit 14... Image control circuit 16... Image compression/expansion circuit 18... Main storage device 20... Image scaling circuit 22 24 26 28 30 32 34 36 38 Image cutting circuit Refresh memory Light source Liquid crystal display Projection lens Screen Operation panel Cursor control device Arithmetic circuit

Claims (4)

[Claims] (1) An image reading section that converts images such as documents into electrical signals, a projection section that changes the transmittance or scattering rate based on the electrical signals read, spatially modulates the light source, and projects the image information, and converts the read image information into digital signals. An image enlargement projection display device having means for converting into an image, storing it in a storage device, reading it out and projecting it. (2) In the image enlargement projection display device according to claim (1), a part of each page of the stored image or the heading of each page is simultaneously displayed on the same screen, and the image of the page specified by the operator's instruction is displayed. An image enlargement projection display device characterized by displaying information. (3) In the image enlargement projection display device according to claim (1), the function of enlarging, reducing, panning, zooming, displaying multiple images in an overlapping manner or displaying a difference, and displaying a marker in an overlapping manner on the displayed image is provided. An image enlargement projection display device characterized by: (4) The image enlargement projection display device according to claim (1), wherein the image reading device is placed outside the main body of the device and is connected to the previous projection section by a communication means. .