JPH041537U - - Google Patents
Info
- Publication number
- JPH041537U JPH041537U JP4201890U JP4201890U JPH041537U JP H041537 U JPH041537 U JP H041537U JP 4201890 U JP4201890 U JP 4201890U JP 4201890 U JP4201890 U JP 4201890U JP H041537 U JPH041537 U JP H041537U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- overhead projector
- reflecting mirror
- light
- fresnel lens
- 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
Links
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図および第２図は本考案によるオーバーヘ
ツドプロジエクタの第１実施例を示す側面図およ
び分解側面図、第３図はその変形例を示す側面図
、第４図は本考案の第２実施例を示す側面図、第
５図はその変形例を示す側面図、第６図および第
７図は従来のオーバーヘツドプロジエクタの各例
を示す斜視図、第８図は液晶表示体の一例を示す
斜視図、第９図は液晶パネルの内部構造を説明す
る断面図である。
１……オーバーヘツドプロジエクタ、２……ハ
ウジング、４，１８，２２……光源、５……反射
ミラー、７……フレネルレンズ、１６……リミツ
トスイツチ（検知器）、２２……外部光源。
1 and 2 are a side view and an exploded side view showing a first embodiment of an overhead projector according to the present invention, FIG. 3 is a side view showing a modification thereof, and FIG. 4 is a second embodiment of an overhead projector according to the present invention. FIG. 5 is a side view showing an embodiment, FIG. 5 is a side view showing a modification thereof, FIGS. 6 and 7 are perspective views showing each example of a conventional overhead projector, and FIG. 8 is an example of a liquid crystal display. FIG. 9 is a sectional view illustrating the internal structure of the liquid crystal panel. DESCRIPTION OF SYMBOLS 1... Overhead projector, 2... Housing, 4, 18, 22... Light source, 5... Reflection mirror, 7... Fresnel lens, 16... Limit switch (detector), 22... External light source.
Claims (1)
ズに反射し、フレネルレンズを透過した光をスク
リーンに投影するオーバーヘツドプロジエクタに
おいて、前記光源と異なる外部光源が着脱可能と
なつており、これらの光源に対して前記反射ミラ
ーの位置または角度が択一的に切換え可能となつ
ていることを特徴とするオーバーヘツドプロジエ
クタ。 (2) 前記外部光源の着脱を検知する検知器を有
し、この検知器の信号によつて前記反射ミラーの
位置または角度切換えが行われることを特徴とす
る請求項第(1)項記載のオーバーヘツドプロジエ
クタ。 (3) 光源からの光を反射ミラーでフレネルレン
ズに反射し、フレネルレンズを透過した光をスク
リーンに投影するオーバーヘツドプロジエクタに
おいて、前記光源が複数設けられ、この光源の中
から選択された一の光源に対して前記反射ミラー
の位置または角度が切換え可能となつていること
を特徴とするオーバーヘツドプロジエクタ。[Claims for Utility Model Registration] (1) In an overhead projector that reflects light from a light source onto a Fresnel lens using a reflecting mirror and projects the light transmitted through the Fresnel lens onto a screen, an external light source different from the light source is detachable. 1. An overhead projector characterized in that the position or angle of the reflecting mirror can be selectively switched with respect to these light sources. (2) The device according to claim (1), further comprising a detector for detecting attachment/detachment of the external light source, and the position or angle of the reflecting mirror is switched based on a signal from the detector. Overhead projector. (3) In an overhead projector that reflects light from a light source onto a Fresnel lens using a reflecting mirror and projects the light transmitted through the Fresnel lens onto a screen, a plurality of the light sources are provided, and one selected from the light sources is used. An overhead projector characterized in that the position or angle of the reflecting mirror is switchable with respect to the light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4201890U JPH041537U (en) | 1990-04-19 | 1990-04-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4201890U JPH041537U (en) | 1990-04-19 | 1990-04-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH041537U true JPH041537U (en) | 1992-01-08 |
Family
ID=31553192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4201890U Pending JPH041537U (en) | 1990-04-19 | 1990-04-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH041537U (en) |
-
1990
- 1990-04-19 JP JP4201890U patent/JPH041537U/ja active Pending
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