JPH046042U - - Google Patents
Info
- Publication number
- JPH046042U JPH046042U JP4575090U JP4575090U JPH046042U JP H046042 U JPH046042 U JP H046042U JP 4575090 U JP4575090 U JP 4575090U JP 4575090 U JP4575090 U JP 4575090U JP H046042 U JPH046042 U JP H046042U
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- overhead projector
- housing
- attached
- 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
- 230000003287 optical effect Effects 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案によるオーバーヘツドプロジエ
クタの一実施例を示す断面図、第２図は複数の光
源の相関関係の一例を示す相関図、第３図は他の
実施例を示す断面図、第４図および第５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６図は液晶表示体の一例を示す斜視図、第
７図は液晶パネルの内部構造を示す断面図である
。
１……オーバーヘツドプロジエクタ、２……ハ
ウジング、４……第１の光源、２０……第２の光
源、８，２２……反射体。
FIG. 1 is a sectional view showing one embodiment of an overhead projector according to the present invention, FIG. 2 is a correlation diagram showing an example of the correlation between a plurality of light sources, and FIG. 3 is a sectional view showing another embodiment. Figures 4 and 5 are perspective views showing examples of conventional overhead projectors, Figure 6 is a perspective view showing an example of a liquid crystal display, and Figure 7 is a sectional view showing the internal structure of a liquid crystal panel. be. DESCRIPTION OF SYMBOLS 1... Overhead projector, 2... Housing, 4... First light source, 20... Second light source, 8, 22... Reflector.
Claims (1)
をフレネルレンズに導き、フレネルレンズを透過
した光により投影を行うオーバーヘツドプロジエ
クタにおいて、前記光源がランプおよびランプの
光を集光する反射板を備えて構成され、それぞれ
の光軸が一致するように複数の光源がハウジング
に交互に着脱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) 前記複数の光源の反射板の反射面が相似し
た楕円体面に形成され、これらの反射面の集光点
が一致する位置に光源がハウジングに装着される
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) 前記複数の光源の内の一の光源の離脱と共
に、当該一の光源が取り付けられたハウジング部
分が開口され、この開口部に対して値の光源の装
着が行われることを特徴とする請求項第(1)項ま
たは第(2)項記載のオーバーヘツドプロジエクタ
。[Claims for Utility Model Registration] (1) In an overhead projector that guides light from a light source attached to a housing to a Fresnel lens and projects using the light transmitted through the Fresnel lens, the light source includes a lamp and the light of the lamp. What is claimed is: 1. An overhead projector comprising a reflector for condensing light, and a plurality of light sources are alternately attachable to and detachable from a housing so that their respective optical axes coincide. (2) The reflecting surfaces of the reflecting plates of the plurality of light sources are formed into similar ellipsoidal surfaces, and the light sources are mounted on the housing at positions where the condensing points of these reflecting surfaces coincide. The overhead projector described in (1). (3) When one light source among the plurality of light sources is removed, a housing portion to which the one light source is attached is opened, and a value light source is attached to this opening. An overhead projector according to claim (1) or (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4575090U JPH046042U (en) | 1990-04-26 | 1990-04-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4575090U JPH046042U (en) | 1990-04-26 | 1990-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH046042U true JPH046042U (en) | 1992-01-21 |
Family
ID=31560205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4575090U Pending JPH046042U (en) | 1990-04-26 | 1990-04-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH046042U (en) |
-
1990
- 1990-04-26 JP JP4575090U patent/JPH046042U/ja active Pending
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