JPH0216592A - Overhead projector - Google Patents

Abstract

PURPOSE:To project a material which is created by electronic equipment such as an electronic computer and a word processor directly on a screen by using a transmission type liquid crystal display panel where data supplied from the electronic equipment can be displayed as a mount surface for a document sheet. CONSTITUTION:The electronic equipment 5 can be connected to a main body 1 through a cable and the data supplied from the electronic equipment 5 are displayed as a visible image on a liquid crystal display panel 11. Therefore, the explanatory material such as a graph and a table is created on the electronic equipment 5 and then stored on a storage means such as a floppy disk. Then when the material is required for explanation, the stored data are read and displayed directly on the liquid crystal display panel 11. Consequently, the visible image displayed on the liquid crystal display panel 11 is projected on the screen 4 through a head 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an overhead projector (hereinafter referred to as "overhead projector") used at conferences, lectures, etc. to project explanatory materials onto a screen to facilitate understanding by participants. It is called rOHPJ.

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[Conventional technology] When using OHP, in the past, explanation materials were first displayed.
It is necessary to create a document sheet for HP, and this is placed on a sheet mounting table made of transparent glass of the OHP main body, and light is irradiated from below the sheet and reflected by a reflecting mirror above. The image was then enlarged using an optical system and projected onto a screen.

[Problems to be Solved] Conventionally, explanatory materials had to be created on OHP sheets by hand or by copying, and if you wanted to explain using complicated graphs or figures, Creating this manuscript sheet is time consuming and extremely complicated.

To enable materials created with an electronic device such as a computer or a word processor to be directly projected onto a screen without requiring the effort of creating detailed explanatory materials of the present invention on sheets.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a transparent type that can be connected to electronic equipment such as a computer or a word processor, and can display data supplied from the electronic equipment. The liquid crystal display panel serves as the surface on which the original sheet is placed.

The above-described liquid crystal display panel is of a matrix type and is effective for displaying complex images, single characters, and the like.

[Embodiment] As shown in FIG. 1.2, the original sheet placement surface of the OHP main body 1 is constituted by a liquid crystal display panel 11. As shown in FIG. This liquid crystal display panel 11 displays a complex image 2.
In order to be able to display characters etc. clearly, a matrix type is preferably used. A light source 12 is provided inside the main body 1 to illuminate the liquid crystal display panel 11 from below. A head 3 is supported on the main body 1 by a stand 2, and inside the head 3, as shown in the second figure, there is a reflecting mirror 31 that reflects an image on the liquid crystal display panel 11.
A lens system 32 is provided to magnify the image on the reflecting mirror 31. The enlarged image transmitted through the lens system 32 is projected onto the screen 4.

An electronic device 5 can be connected to the OHP main body 1 via a cable (not shown). The electronic device 5 can be an image scanner, a facsimile, a VTR, etc. in addition to a computer, a word processor, etc., and the data supplied from the electronic device 5 can be displayed as a visible image on the liquid crystal display panel 11. It has become.

With this structure, when explanatory materials such as graphs and tables are created using the electronic device 5, they are stored in a storage means such as a floppy disk (not shown). When necessary for explanation, this stored data is called up and displayed directly on the liquid crystal display panel 11. Then, the visible image displayed on the liquid crystal display panel 11 is projected onto the screen 4 via the head 3.

Note that the liquid crystal display panel 11 may be of a positive display type or a negative display type.

It goes without saying that it is also possible to place handwritten material on a transparent sheet on the mounting surface and project it onto the screen 4, as in the past.

[Effect] As explained above, according to the present invention, explanatory materials can be
Materials created with electronic devices can be displayed directly on the liquid crystal display panel, which is the surface on which the original sheet is placed, without the need for handwriting or copying on P sheets.
Complex expressions are possible without much effort, and detailed explanatory materials provide sufficient understanding. In addition, by making the liquid crystal display panel a matrix type,
It is possible to display complex expressions.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view, and FIG. 2 is a partially sectional explanatory view. 5...Electronic equipment, 11...Liquid crystal display panel. Figure 2 above

Claims (1)

[Claims] 1. A transmissive liquid crystal display panel that can be connected to an electronic device such as a computer or a word processor and that can display data supplied from the electronic device is attached to the surface on which the original sheet is placed. An overhead projector that is characterized by: 2. The overhead projector according to claim 1, wherein the liquid crystal display panel is of a matrix type.