JPH02236586A - Overhead projector - Google Patents

Abstract

PURPOSE:To achieve synthesizing and projecting through a simple manipulation by storing picture data obtained from original of plural pages, synthesizing projection data for one picture plane from the stored picture data, and controlling the on/off of an optical shutter based on the data. CONSTITUTION:A storage means A stores original data read by a reading means B such as an image reader, a projecting means C projects the original data under the control of the optical shutter which uses a liquid crystal, etc. A synthesizing means D synthesizes data for one projection picture plane from the original data of plural pages stored in the storage means A; a register number key E specifies desired original data by the page. After the manipulation of a first specific key F, the register number key E, and a second specific key G in that order, the synthesizing means D and the projecting means C operate to perform synthesization and projection. Thus, synthesization and projection can be performed through a series of simple manipulations when the original of plural synthesized pages is required to be projected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an overhead projector using optical shutter control using a liquid crystal or the like. [Summary of the Invention] The present invention accumulates and stores image data obtained from an arbitrary document of multiple pages in an overhead 7-fold projector, and displays one screen from the stored image data by a simple designation operation. The projection (display) data for 1 page is synthesized, and projection is performed by controlling the opening and closing of the optical shutter based on this data. This reduces the effort required to create a manuscript. [Prior Art] An overhead projector is used to enlarge and project characters and figures written on a transparent sheet, or images formed on a transparent sheet, onto a screen during a seminar or conference. Conventionally, the original of the image projected onto this screen is created by fixing black toner on a transparent film using a copying machine capable of copying onto a transparent film. In addition, manuscripts are created by writing manuscript information directly on transparent film with an oil-based felt marker or by printing manuscript information onto transparent film. [Problem to be solved by the invention 1 However, in such a device, it is necessary to write the manuscript on a transparent film, and it is not possible to directly use conference materials written on ordinary paper (manuscript medium) as the manuscript. Since it is not possible to do so, the work of creating JFX disasters is troublesome. Also,
Generally, multiple-page manuscripts are used in seminars and conferences, but there is a problem in that the manuscript needs to be reset each time the seminar or conference is held, causing the explanation to be interrupted. Furthermore, there are cases where it is desired to project multiple pages of a manuscript in a composite form, but in such cases it is necessary to create a composite manuscript each time. An object of the present invention is to enable composite projection with a simple operation when it is desired to project multiple pages of a manuscript in a composite form. [A thousand steps to solve the problem] The means of this invention are as follows. Storage means A (see the block diagram in FIG. 1; the same applies hereinafter) stores document data read by reading means B, such as an image reader. The projection means C projects the original data by controlling an optical shutter using a liquid or the like. The synthesizing means D synthesizes data for one projection screen from a plurality of pages of original data stored in the storage means A. The numeric key E specifies the desired am data in units of pages. Then, the first specific key F. When the numeric key E and the second specific key G are operated in this order, the compositing means D and the projection means C operate to perform composite projection. [Operation] The operation of the means of this invention is as follows. Now, for example, when an operator wants to project a composite of several pages from the original data stored in storage means A, he first operates the first specific key F, and then presses the numeric key E. Operate to specify several desired pages, and finally operate the second specific key G. Through this series of operations, the synthesizing means D synthesizes data for one projection screen from the manuscript data of the specified page, and the projecting means C
projects this composite data using optical shutter control. Therefore, if you want to project multiple pages of a manuscript in a composite form, you can do so with a simple operation. [Example J This will be described in detail below with reference to FIGS. 2 to 4. FIG. 2 is a configuration diagram of an overhead projector showing one embodiment. This overhead projector is roughly divided into a document information input section 1, a data control section 2, a data storage section 3, a control instruction section 4, and an optical control section It is composed of 5. ! ! The draft information input section 1 is used to store manuscripts 6 such as conference materials, etc.
document table 7 and COD (charge-coupled device) for
, a TV (television) camera or other original reading device g18, which scans the original 6 placed on the original platen 7 and converts the original information written on the original 6 into image data. and output it to the data control unit 2. This data control unit 2 includes a reading control unit 9, a page RAM
Control unit lO, liquid crystal control unit l5, display data control fl11
2. The reading control section 9 drives and controls the document reading device 8, and outputs the image data input from the document reading device 8 to the page RAM control section 10. This page RAM control unit 10 temporarily stores the input image data in the page RAM (random access memory) 11 of the data storage unit 3. Also, page RAM
The control section 10 accesses the page RAM II based on the control instruction from the control instruction section 4, and transfers the read image data to the display data control section 12. This display data control section 1
A data storage unit 2 converts the image data given from the page RAM control unit lO into display data for one screen in a format corresponding to a liquid crystal light shutter l6, which will be described later, using a data synthesis control unit l3 as necessary. Temporarily store it in the display RAM l4. The display data stored in the display RAM 14 is output to the liquid crystal control section 15, and the liquid crystal control section 15 creates control signals for driving the opening and closing of the liquid crystal optical shutter 16 according to the input display data. The control instruction section 4 also includes a key arrangement section 17 having various keys and a key matrix.
, and a key control section l8 that detects the operated key by scanning the key matrix of the key arrangement section 17 and outputs the detection signal to the data control section 2, so that the operator can check the document information. This is for giving desired control instructions to the input section 1 or the data control section 2. FIG. 3 shows the key items of the key arrangement section 17, including the reading keys 17A, . Projection key 17B for projecting image data stored in data storage unit 3, page R
In addition to the page specification key 17c for specifying the page of AMll,
Numeric key 17D for specifying numerical values such as page numbers. A compositing key 17E and the like are provided for composing image data stored in the page RAM II on a page-by-page basis over a plurality of pages. The optical control section 5 is composed of a liquid crystal light shutter l6, a light source l9, a condenser lens 20, and a prism 2l, and the liquid crystal light shutter l6 is irradiated with light from a light source l9 composed of a halogen lamp or the like. In this liquid crystal light shutter l6, liquid crystal and transparent electrodes are arranged in a matrix to form a large number of light shutters, and the liquid crystal control unit 1
By applying a control signal (fil control voltage) output from 5 to the transparent electrode, the liquid crystal corresponding to each shutter is opened or closed. Therefore, out of the light emitted from the light source l9, the light that enters the shutter that is controlled to be open is:
The light passes through the shutter and enters the prism 21 via the condenser lens 20. The light incident on the prism 2l is changed into a 90'' optical path by the total reflection effect of the prism 2l and is projected onto the screen 22.
When the shutter 6 is controlled to be closed, the optical path of the incident light is blocked by the shutter. In this way, the light emitted from the light source l9 is transmitted to the liquid crystal light shutter 16.
Since the opening and closing states of each shutter of the liquid crystal light shutter l6 are controlled based on display data, the output of the light source l9 projected onto the screen 22 is The emitted light reflects the displayed data. Note that a magnifying lens (not shown) is provided behind the prism 21, and the display data shown in the open/closed state of each shutter of the liquid crystal light shutter l6 is as follows.
The image is enlarged and projected onto the screen 22. Next, the operation of the overhead projector of this embodiment configured as described above will be explained. First, the reading operation of document 6 will be explained. When scanning, first place the original platen 7.
Place the M-6 you want to project onto the screen 22. As long as this manuscript 6 is written in a visible manner, the type of manuscript medium does not matter. When the original 6 is placed on the original table 7, the reading key 17A of the key arrangement part 17 is pressed.
When the user operates , this operation status is detected by scanning the key matrix by the key control section l8, and the document reading device M8 is driven under the control of the reading control section 9. As a result, the document reading device 8 scans and reads the document information of the document 6.
The data is converted into image data and output to the page RAM control unit IO. Then, the RAM control unit IO stores the input image data in area #1 of page RAMII. Similarly, when the next original is read in sequence, it is stored in areas #2 to #5. If you want to project this image data immediately, press the page designation key 170, the above t number key 17D.
, operate the projection key 17B. Then, page RA
Under the control of the M control unit 10, image data designated as a page (any one of #1 to #5) is read out from the page RAMII, output to the display data control unit 12, and sent to the liquid crystal optical shutter l.
It is assembled (expanded) as display data for one page in a form corresponding to the shirt data matrix of No. 6, and is stored in the display RAM 14.
is stored in Then, the display data of the display RAM 14 (
When the image data) is output to the liquid crystal control section 15, the liquid product control section 15 creates a control signal corresponding to the display data and supplies it to the liquid crystal optical shutter 16. Then, each shutter of the liquid crystal light shutter 16 is controlled! Opening/closing is controlled by signals. For example, on the specified page RAMII, “
When image data of "A" is stored, only the portion of the liquid crystal light shutter 16 corresponding to the letter "A" is controlled to be closed, and the other shutters are controlled to be opened. Of the light emitted from the light source 19, the light that enters the closed shutter corresponding to "A" is blocked, and the light that enters the other open shutters is transmitted. Since the light projected onto the screen 22 through the screen 22 is only from the part marked "A", the part marked "A" becomes dark and the other parts become bright, making it possible to read it as "A". In this way, it becomes possible to directly use materials written on plain paper without first writing the contents of the original drawings on transparent film as in the past. When storing data in the data storage unit 3, the above-mentioned steps of placing the original 6 on the original platen 7 and operating the reading key 17A are repeated.In this way, multiple pages of the original 6 are stored. If you memorize it all at once, you won't have to reset the manuscript each time you go to a projection site such as a seminar.In this way, for example, an "A" was written in the upper left to make the explanation easier to understand! K draft 6 (Figure 4(a)). H draft 6 with “B” written on the upper right (Fig. 4 (b)), “C” written on the lower left
Manuscript 6 on which n is written (Fig. 4 (C)). Assume that the document 6 (FIG. 4 [d]) with "D" written in the lower right corner is read and the image data is stored in page RAMI 1 in the state shown in FIG. In this state, composite key l7E
, “l” key, “2” key, “3” key, “4” key, and projection key 17B, the page RAM
Under the control of the control section 10, the image data of pages 1 to 4 are sequentially read out and output to the display data control section 12. At this time, the page RAM control unit 10 also sends a synthesis instruction signal to the display data control unit 12 based on the detection signal of the synthesis key 17H. When the display data control section 12 receives the synthesis instruction signal, it sequentially outputs the image data input from the page RAMffA control section 10 to the data synthesis control section l3.
The data synthesis control unit 13 executes an OR (logical sum) operation on the input image data of pages 1 to 4, synthesizes them, and controls the display data using the synthesis result (corresponding to screen 1). Transfer to Section 12. Then, the display data control section 12 assembles the composite data on the display RAM 14 in a form corresponding to each shutter of the liquid crystal light shutter 16. After this,
The composite data of the l screen assembled (developed) on the display RAM l4 is controlled by the display data! 12. Page RA
M control fi! The data is output to the liquid crystal control unit l5 as display data via the io. The liquid crystal control section l5 creates a control signal corresponding to this display data and supplies it to the liquid crystal light shutter l6. Then, each shutter of the liquid crystal light shutter l6 is driven to open and close according to the control signal, and one page of synthesized display data is projected onto the screen 22, as shown in FIG. In this way, image data of a plurality of arbitrary pages are synthesized into one page of display data compatible with the liquid crystal optical shutter l6, and the image data that has been dispersed on each page is simultaneously projected onto one screen of the screen 22. This makes it possible to project materials in a format that is easy to understand. Note that this is not limited to the above-described embodiment; for example, the key arrangement may be modified so that the operator does not need to know what kind of image data is stored in which page of page RAMII. It is also possible to provide a search key in section 17, and to make the operator aware of the contents of page RAMII by sequentially projecting the image data of all pages of page RAMII by operating this search key. In addition, it is also possible to use a photochromic that utilizes a photochromic effect instead of the liquid optical shutter 16 (p). Projection can be performed with simple operations, greatly improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the invention, Fig. 2 is a configuration diagram of one embodiment, Fig. 3 is a diagram showing key items of the key arrangement section, and Fig. 4 is for explaining the composition a1 of Fig. 2. This is a diagram. 8... Original reading device, 11... Page RAM, l2... Display data control section, l5...
...Liquid crystal control unit, l6...Liquid crystal light shutter. (d) Figure

Claims (1)

[Scope of Claims] A storage means for storing original data read by the reading means, a projection means for projecting the original data by controlling an optical shutter, and one projection from a plurality of pages of original data stored in the storage means. An overhead projector comprising a synthesis means for synthesizing data for a screen, which includes a first specific key, a number key for specifying desired manuscript data on a page-by-page basis, and a second specific key; An overhead projector characterized in that by operating a key, a numeric key, and a second specific key in this order, the synthesizing means and the projection means are activated to perform synthetic projection.