JPH02236587A - Overhead projector - Google Patents

Overhead projector

Info

Publication number
JPH02236587A
JPH02236587A JP3237190A JP3237190A JPH02236587A JP H02236587 A JPH02236587 A JP H02236587A JP 3237190 A JP3237190 A JP 3237190A JP 3237190 A JP3237190 A JP 3237190A JP H02236587 A JPH02236587 A JP H02236587A
Authority
JP
Japan
Prior art keywords
original data
key
original
shutter
liquid crystal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3237190A
Other languages
Japanese (ja)
Inventor
Fuminobu Noji
野地 文信
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casio Computer Co Ltd
Original Assignee
Casio Computer Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP3237190A priority Critical patent/JPH02236587A/en
Publication of JPH02236587A publication Critical patent/JPH02236587A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To immediately project desired original data by correctly selecting the desired original data out of original data for plural picture planes, which is stored in a storage device in advance, by means of an original specifying means when required. CONSTITUTION:A projecting means A projects the original data under the control of an optical shutter, a storage means B stores the original data for the plural picture planes, and the original specifying means C selects and specifies the desired original data out of the original data stored in the storage means B. The original specifying means C is provided with at least a register number key and a specific key. The manipulation of only the register number key does not suffice; selecting and specifying can be effected only when both the register number key and the specific key are manipulated. Thus, an original can be correctly selected and specified when required.

Description

【発明の詳細な説明】 【産業上の利用分野1 本発明は、原稿情報をスクリーン上に投影するオーバヘ
ッドプロジェクタに関するものである.[発明の概要] 本発明は,オーバヘッドプロジェクタにおいて,記憶装
置に予め記憶されている複数画面分の原稿データの中か
ら所望の原稿データを原稿指定手段により必要な時に正
しく選択することにより、所望の原稿データを直ちに投
影できるようにしたものである. [従来の技術] オーバヘッドプロジェクタは講習会や会議で透明シート
上に書込まれた文字や図形、又は透明シート上に形成さ
れた画像等をスクリーン上に拡大投影するものである. 従来、このスクリーン上に投彰される画像の原稿は、透
明フィルムへの複写が可能な複写機を用いて透明フィル
ムに黒色トナーを定着させて作成している.また、透明
フィルムに直接油性のフェルトベン〒画像を書込むこと
や、透明フィルムに画像を焼付けることにより原稿を作
成している。 しかし,このように原稿を一旦、透明フィルム上に描く
必要があり、投影の際は,透明フィルムを順次置き換え
なければならず,繁雑であるので、特開昭59−229
545号公報に示されるように,透明フィルムに代え液
晶表示器を用いるものが提案されており、記憶部に格納
された原稿をスイッチ操作で逐次スクリーン上に投影す
るようにしている. [発明が解決しようとする課題] しかしながら,説明の都合等により先に投影した原稿を
再度投影したい場合が生ずるので、上述のように単純に
逐次投影できるだけでは不充分である. そこで原稿の選択指定ができるようにするため置数キー
を設けることが考えられるが、投影中は部屋の小を暗く
しているので不用意に手や袖がn数キーに触れて突然投
影画面が切り換わってしまうという問題がある. 本発明の課題は、本当に必要な時に原稿を正しく選択指
定できるようにすることである.[a!題を解決するた
めの手段] 本発明の手段は次の通りである. 光シャッタ制御により原稿データを投影する投影手段A
、(第1図のブロック図を参照、以下同様)、複数画面
分の原稿データを記憶する記憶千段B、記憶千段Bに記
憶された原稿データの中から所望の原稿データを選択指
定する原稿指定手段Cとを備え、原稿指定千段Cは少な
くとも置数キーと特定キーを有する.単にこのn数キー
だけの操作では不十分であって、訝数キーと特定キーが
操作された場合に(順序は問わず)初めて選択指定が行
なわれる. [作 用] 本発明の手段の作用は次の通りである.今,例えば液晶
表示パネル等を用いた光シャッタ制御により投影手段A
が記憶手段Bに記憶されている原稿データを投影してい
るものとする.ここで賀間等がありその説明の都合上、
既に投影した原稿データを再度投影する必要が生じた場
合2原稿指定手段Cの置数キー(どの原稿かのセレクト
用)と特定キー(1つでも複殼でもよい)の操作により
選択指定を行なう. 従って、本当に必要な時に原稿を正しく選択指定できる
. [実施例】 以下,第2図、第35!Jを用いて一実施例を詳細に説
明する. 第2図は一実施例を示すオーバヘッドプロジェクタの構
成図であり、磁気ディスク装ffilには、COD (
電荷結合素子) , TV (テレビ)カメラ等で構成
された原稿読取部(図示省略)を走査することにより任
意の原稿から読取った原稿データが格納されている. キー配設部2は、第3図に示すように、所望の原稿を指
定するための置数キー2A、原稿指定(頁指定)モード
を設定するための頁指定キー2B、磁気データvt置1
に記憶された原稿データを投影させるための投影キー2
0等を有しており、これらの各キーはキー配設部2の内
部に設けられたキーマトリクスがキー制御部3により走
査されることにより、その操作状態が検知される.この
キー制御部3には外部記憶制御部4が接続されており、
外部記憶制御部4は、キー制御部3から与えられたキー
操作信号に基づいて所定のアドレス信号を発生させて磁
気ディスク装置lに与え、キー操作信号に対応する原稿
データを読出してRAM制御部5に山力する.このRA
M制御部5は、与えられた一画面分の原稿データを後述
する液晶光シャッタ7の各シャッタに対応する形にRA
MG上で組立てる(展開する).このようにして組立て
られた一画面分の原稿データは、RAM制御部5を介し
て液晶制御部8に出力され,液晶制御部8では入力され
た原稿データに基づいて液晶光シャッタ7の各シャッタ
を開閉駆動するための制御信号を作成し、液晶光シャー
2夕7に出力する.この液晶光シャッタ7には液晶およ
び透明電極がマトリクス状に配設されて多数のシャッタ
が形成されており,上述の制御信号に従って各シャツタ
の液晶は開または閉状態となる.このように開または閉
状態に制御される液品光シャッタ7には/\ロゲンラン
プ等で構成される光源9により光が照射される構成とな
っている.したがって、この液品光シャツタフに照射さ
れた光の中で、開状態に制御されたシャッタに入射した
光は、そのシャ7タ部を透過し、集光レンズ10を介し
てプリズム1lに入射する.このプリズム11に入射し
た光は,プリズム11の全反射作用により90″光路が
変更され、スクリーンl2上に投影される.方、閉状態
に制御されたシャッタへの入射光は,そのシャッタによ
り光路が遮られる.このように,光源9の出射光は、液
晶光シャツタ7の各シャッタの開閉状態に応じてスクリ
ーンl2上に投影され,また,液品光シャッタ7の各シ
ャツタの開閉状態は、原稿データに基づいて制御される
ので、スクリーン12に投影された光源9の出射光は原
稿データを反映したものとなる. なお、プリズム11の後方には図示省略した拡大レンズ
が設けられており、液晶光シャツタ7の各シャッタの開
閉状慝で示される原稿データは,拡大されてスクリーン
l2上に投影される.次に、上述のように構成されたオ
ーバヘッドプロジェクタの動作を説明する.今,図示省
略した読取装置により、磁気ディスク装W1lに画面(
頁)#l〜#4分の原稿データが格納されているものと
する.この状態でキー配設部2の頁指定キー2Bを操作
して原稿指定モードを設定し,置数キー2Aの″3″を
操作し,さらに投影キー2Cを操作すると、キー制御部
3によりキー配設部2の内部のキーマトリクスが走査さ
れ、それらのキー操作信号が外部記憶制御部4に与えら
れる.そうすると、外部記憶制御部4は与えられた頁指
定キー2Bと“3”対応の置数キー2Aの操作信号に基
づいて所定のアドレス信号を磁気ディスク装置1に与え
、画面#3の原稿データを読出してR A M ffj
l御部5に出力する.RAM制御部5は入力された原稿
データを液晶光シャツタ7の各シャッタに対応する形に
RAMB上で組立てる(展開する).この組立てが完了
すると、RAM制御部5はその旨を外部記憶制御部4に
通知し,その通知を受信すると、外部記憶制御部4はキ
ー制御部3から与えられた投影キー20の操作信号に基
づいて投影指令信号を液晶制御部8に与える.そうする
と、液晶制御部8はRAM制御部5に読出指令を与えて
R A M ftJI御部5を介してRAM6から画面
#3の原稿データを取得し、この原稿データに基づいて
液晶光シャッタ7の各シャッタを開閉駆動する制御信号
を作成し、一液品光シャッタ7に出力する.そうすると
、液晶光シャッタ7の各シャ,タはその制御信号により
開閉制御される.例えば、指定された画面#3の原稿デ
ータが“A″の場合には、液晶光シャッタ7は文字″A
”に対応する部分のシャッタのみが閉状態に制御され、
他のシャッタは開状態に制御される.したがって5光源
9の出射光のうち″A”に対応する閉状態のシャッタに
入射したものは遮断され、それ以列の開状態のシャッタ
に入射したものは透過されるので、集光レンズ10、プ
リズムl1を介してスクリーンl2に投影される光は″
A″の部分以外のみとなるので、“A”の部分が暗くな
り、他の部分が明るくなって″A”として判読すること
が可能となる.このようにして,所望の原稿情報を即座
に投影することが可能となる.また、磁気ディスク装W
11に格納される原稿データは、CCD (71t荷結
合素子),TV(テレビ)カメラ等で構成される図示省
略した原稿読取部を走査することにより得られるので、
原稿は透明フイルム上に記載する必要がなく、普通紙等
を直接使用することができる. なお、上述の実施例に限定されるものではなく、例えば
,磁気ディスク装Mlの代わりに光ディスク装置等の他
の外部記憶装置、または内部記憶装置(RAM)を使用
することも可佳である.また、本実施例は、予め磁気デ
ィスク装Htに原稿データを格納しておく場合であった
が、会諸,講習会等の現場において、その都度,原稿読
取部にて必要な原稿データを読取らせ、その原稿データ
を直ちに投影することも可能である.さらに,液晶光シ
ャツタフに代えてホトクロミツク効果を利用したホトク
ロミックを使用しても良い.[発明の効果] 本発明によれば、所望の原稿データを必要な時に正しく
選択指定することができるので、スムーズで分かり易い
発表等が可能となる.
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to an overhead projector that projects document information onto a screen. [Summary of the Invention] The present invention provides an overhead projector in which desired original data is correctly selected at the necessary time by an original specifying means from among multiple screens of original data stored in advance in a storage device. This allows the manuscript data to be projected immediately. [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 has been 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 directly writing an oil-based felt marker image on a transparent film or by printing an image onto a transparent film. However, it is necessary to first draw the original on a transparent film in this way, and when projecting, the transparent film must be replaced one after another, which is complicated.
As shown in Japanese Patent No. 545, a system using a liquid crystal display instead of a transparent film has been proposed, in which originals stored in a storage section are successively projected onto a screen by operating a switch. [Problems to be Solved by the Invention] However, there may be cases where it is necessary to re-project a previously projected original for convenience of explanation, etc., so simply being able to perform sequential projection as described above is insufficient. Therefore, it is possible to provide a number key to enable selection and designation of the original, but since the room is darkened during projection, if your hand or sleeve touches the n number key, the projection screen suddenly appears. There is a problem that the The problem of the present invention is to enable users to correctly select and specify manuscripts when they are really needed. [a! Means for Solving the Problem] The means of the present invention are as follows. Projection means A that projects original data by optical shutter control
(Refer to the block diagram in FIG. 1; the same applies hereinafter), 1,000-stage memory B stores manuscript data for multiple screens, and selects and specifies desired manuscript data from among the manuscript data stored in 1,000-stage memory B. The document specifying means C has at least a number key and a specific key. Merely operating the n number keys alone is not sufficient; the selection is specified only when the numeric key and the specific key are operated (regardless of the order). [Function] The function of the means of the present invention is as follows. Now, for example, the projection means A is controlled by an optical shutter using a liquid crystal display panel or the like.
Assume that the original data stored in storage means B is being projected. Here, there is Kama et al., and for the sake of explanation,
If it becomes necessary to project the already projected original data again, select and specify by operating the number key (for selecting which original) and the specific key (one or more) of the 2-original specifying means C. .. Therefore, you can select and specify the manuscript correctly when you really need it. [Example] Below, Figures 2 and 35! An example will be explained in detail using J. FIG. 2 is a configuration diagram of an overhead projector showing one embodiment, and the magnetic disk device ffil includes COD (
Document data read from an arbitrary document by scanning with a document reading section (not shown) consisting of a charge-coupled device (charge-coupled device), a TV camera, etc. is stored. As shown in FIG. 3, the key arrangement section 2 includes a number key 2A for specifying a desired manuscript, a page specification key 2B for setting a document specification (page specification) mode, and a magnetic data vt position 1.
Projection key 2 for projecting original data stored in
0, etc., and the operating state of each of these keys is detected by scanning a key matrix provided inside the key arrangement section 2 by the key control section 3. An external storage control unit 4 is connected to this key control unit 3.
The external storage control section 4 generates a predetermined address signal based on the key operation signal given from the key control section 3 and supplies it to the magnetic disk device l, reads out the original data corresponding to the key operation signal, and sends it to the RAM control section. I'll move on to 5. This R.A.
The M control unit 5 RAs the given one screen worth of original data in a form corresponding to each shutter of the liquid crystal light shutter 7, which will be described later.
Assemble (deploy) on MG. The document data for one screen assembled in this way is output to the liquid crystal control section 8 via the RAM control section 5, and the liquid crystal control section 8 operates each shutter of the liquid crystal optical shutter 7 based on the input document data. Creates a control signal to drive the opening/closing of the LCD light switch 2 and outputs it to the LCD light switch 7. The liquid crystal light shutter 7 has a large number of shutters formed by arranging liquid crystal and transparent electrodes in a matrix, and the liquid crystal of each shutter is opened or closed according to the above-mentioned control signal. The liquid light shutter 7, which is controlled to open or close in this manner, is irradiated with light by a light source 9 composed of a /\logen lamp or the like. Therefore, among the light irradiated to the liquid light shirt tough, the light that enters the shutter that is controlled to be in the open state is transmitted through the shutter section and enters the prism 1l via the condenser lens 10. .. The light incident on this prism 11 is changed in its 90'' optical path by the total reflection effect of the prism 11, and is projected onto the screen l2.On the other hand, the light incident on the shutter, which is controlled to be closed, has its optical path changed by the shutter. In this way, the emitted light from the light source 9 is projected onto the screen l2 according to the open/closed state of each shutter of the liquid crystal light shutter 7, and the open/closed state of each shutter of the liquid crystal light shutter 7 is Since it is controlled based on the original data, the light emitted from the light source 9 projected onto the screen 12 reflects the original data.A magnifying lens (not shown) is provided behind the prism 11. The document data indicated by the opening and closing states of each shutter of the liquid crystal optical shutter 7 is enlarged and projected onto the screen l2.Next, the operation of the overhead projector configured as described above will be explained. The omitted reading device reads the screen (
Page) It is assumed that manuscript data for #1 to #4 is stored. In this state, operate the page designation key 2B of the key arrangement section 2 to set the document designation mode, operate the number key 2A "3", and then operate the projection key 2C. The key matrix inside the arrangement section 2 is scanned, and these key operation signals are given to the external storage control section 4. Then, the external storage control unit 4 gives a predetermined address signal to the magnetic disk device 1 based on the operation signals of the given page designation key 2B and the number key 2A corresponding to "3", and reads the manuscript data of screen #3. Read R A M ffj
l Output to control section 5. The RAM control unit 5 assembles (expands) the input manuscript data in a form corresponding to each shutter of the liquid crystal optical shutter 7 on the RAMB. When this assembly is completed, the RAM control unit 5 notifies the external storage control unit 4 of this fact, and upon receiving this notification, the external storage control unit 4 responds to the operation signal of the projection key 20 given from the key control unit 3. Based on this, a projection command signal is given to the liquid crystal control section 8. Then, the liquid crystal control section 8 gives a read command to the RAM control section 5 to obtain the document data of screen #3 from the RAM 6 via the RAM ftJI control section 5, and controls the liquid crystal light shutter 7 based on this document data. A control signal for driving each shutter to open and close is created and output to the one-liquid optical shutter 7. Then, each shutter of the liquid crystal light shutter 7 is controlled to open and close by the control signal. For example, if the specified document data of screen #3 is "A", the liquid crystal light shutter 7 will release the character "A".
” only the shutter of the part corresponding to is controlled to the closed state,
The other shutters are controlled to be open. Therefore, of the light emitted from the five light sources 9, the light that enters the shutter in the closed state corresponding to "A" is blocked, and the light that enters the shutters in the open state in the other rows is transmitted, so that the condenser lens 10, The light projected onto the screen l2 via the prism l1 is
Since only the part other than "A" is displayed, the "A" part becomes dark and the other parts become bright, making it possible to read it as "A". In this way, the desired document information can be immediately obtained. It is also possible to project images using a magnetic disk drive W.
The manuscript data stored in 11 is obtained by scanning a manuscript reading section (not shown) consisting of a CCD (71t load coupling device), a TV (television) camera, etc.
Manuscripts do not need to be written on transparent film; plain paper, etc. can be used directly. It should be noted that the present invention is not limited to the above-described embodiment, and for example, other external storage devices such as an optical disk device or an internal storage device (RAM) may be used instead of the magnetic disk device M1. In addition, in this embodiment, the manuscript data is stored in advance in the magnetic disk drive Ht, but at the site of meetings, seminars, etc., the necessary manuscript data can be read by the manuscript reading section each time. It is also possible to project the original data immediately. Furthermore, instead of the liquid crystal light shirt tough, a photochromic that utilizes the photochromic effect may be used. [Effects of the Invention] According to the present invention, desired manuscript data can be selected and specified correctly when necessary, so that smooth and easy-to-understand presentations can be made.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明のブロック図,第2図は一実施例の構成
図、第3図はキー配設部のキー項目を示す図である. l・・・・・・磁気ディスク装置,2・・・・・・キー
配設部、4・・・・・・外部記憶制御部,7・・・・・
・液晶光シャッタ、8・・・・・・液晶制御部.
Fig. 1 is a block diagram of the present invention, Fig. 2 is a configuration diagram of one embodiment, and Fig. 3 is a diagram showing key items of the key arrangement section. 1...Magnetic disk device, 2...Key arrangement unit, 4...External storage control unit, 7...
・Liquid crystal light shutter, 8...Liquid crystal control section.

Claims (1)

【特許請求の範囲】[Claims] 光シャッタ制御により原稿データを投影する投影手段と
、複数画面分の原稿データを記憶する記憶手段と、この
記憶手段に記憶された原稿データの中から所望の原稿デ
ータを選択指定する原稿指定手段とを備えるオーバヘッ
ドプロジェクタにおいて上記原稿指定手段は少なくとも
置数キーと特定キーとを備え、これら置数キーと特定キ
ーの操作により選択指定が行なわれることを特徴とする
オーバヘッドプロジェクタ。
A projection means for projecting original data by controlling an optical shutter; a storage means for storing original data for a plurality of screens; and an original specification means for selecting and specifying desired original data from among the original data stored in the storage means. In the overhead projector, the document specifying means includes at least a numeric key and a specific key, and selection and designation are performed by operating the numeric key and the specific key.
JP3237190A 1990-02-15 1990-02-15 Overhead projector Pending JPH02236587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3237190A JPH02236587A (en) 1990-02-15 1990-02-15 Overhead projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3237190A JPH02236587A (en) 1990-02-15 1990-02-15 Overhead projector

Publications (1)

Publication Number Publication Date
JPH02236587A true JPH02236587A (en) 1990-09-19

Family

ID=12357088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3237190A Pending JPH02236587A (en) 1990-02-15 1990-02-15 Overhead projector

Country Status (1)

Country Link
JP (1) JPH02236587A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992016871A1 (en) * 1991-03-15 1992-10-01 Seiko Epson Corporation Projection type display device
US5422691A (en) * 1991-03-15 1995-06-06 Seiko Epson Corporation Projection type displaying apparatus and illumination system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59157684A (en) * 1983-02-25 1984-09-07 岡村 正志 Information display

Patent Citations (1)

* Cited by examiner, † Cited by third party
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992016871A1 (en) * 1991-03-15 1992-10-01 Seiko Epson Corporation Projection type display device
US5422691A (en) * 1991-03-15 1995-06-06 Seiko Epson Corporation Projection type displaying apparatus and illumination system

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