JPH04216542A - Time display method of image projector - Google Patents

Abstract

PURPOSE:To allow the knowing of the time even if an image projector is used by providing a time display function on the image projector which does not contain a time display section. CONSTITUTION:The time display device having a time generating section 104, a liquid crystal display section 102 and a solar battery 103 is provided separately from the image projector 201 in the time display method for the image projector which projects the original imposed in a projection area on a projecting surface. The time display device is imposed together with the original in the projecting area 202 at the time of projection and the time is projected together with the original image onto the projection surface 203. The time is known by the above- mentioned time display device even if the image projector which does not contain the time display section is used. A person having the image projector without contg. the time display section is not required display part in order to display the time. The time display function is thus inexpensively provided.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to an image projection device (overhead projector) for enlarging a document and projecting it onto a projection surface, and particularly to a time display method for projecting time or time onto a projection surface. It is related to.

0002

2. Description of the Related Art FIG. 2 is a block diagram of main parts of a conventional image projection apparatus. In FIG. 2, 201a is an image projection device, 20
2a is a projection area of the image projection device 201a on which a document is placed; 203 is a projection surface on which the projection area 202a is projected;
204 is a time display unit built into the projection area 202a;
205 is a time display projection in which the time display of the time display unit 204 is projected onto the projection surface 203; 206 is a projection area 202a;
This is a light source that illuminates the bottom surface of the

Next, the operation will be explained. For example, when a presenter of a manuscript places the manuscript on the projection area 202a of the image projection device 201a, an enlarged manuscript image is projected onto the projection surface 203. Further, the time or time on a time display section 204 built in the projection area 202a is displayed at a corner of the projection surface 203 as a time display projection 205. Therefore, the presenter looks at the original image projected on the projection surface 203 and the time and gives an explanation.

0004

[Problem to be Solved by the Invention] As mentioned above, conventional image projection devices have a built-in time display section that can project and display the time and time in order to inform the presenter of the time and time. If you own and use an image projection device that does not have a built-in time display,
Of course, it is not possible to project the time or time. Therefore, if the time or time is required during a presentation, a new image projection device with a time display section must be purchased, which is a problem in that it is economically wasteful.

The present invention has been made to solve the above-mentioned problems, and provides an image projection device in which the time can be known even when using an image projection device that does not have a built-in time display section. The purpose is to provide a time display method.

[0006]

[Means for Solving the Problems] A time display method in an image projection apparatus according to the present invention includes a time generation section 104 that generates time or time, and a background display that displays time or time based on the output of this time generation section 104. Transparent liquid crystal display section 10
2, and a solar cell 103 that drives the time generating section 104 and the liquid crystal display section 102.
The time display device 101 is provided separately from the image projection device 201, and the time display device 101 is placed together with the original in the projection area 202 during projection.
The time or time is projected onto the projection surface 203 together with the original image.

[0007]

[Operation] In the time display device 101, the time generation section 10
4 generates the time or time, the liquid crystal display section 102 displays the time or time, and the solar cell 103 generates the time or time.
4 and the liquid crystal display section 102 are driven. When the original and the time display device 101 are placed on the projection area 202 during projection,
A document image and time or time are projected onto the projection surface 203.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of the main parts of an image projection apparatus using a time display method according to an embodiment of the present invention. In FIG. 1, components corresponding to those shown in FIG. 2 are designated by the same reference numerals, and their explanations will be omitted. In FIG. 1, a time display device 101 includes a time generation unit 1 that generates time or time.
04, a transparent liquid crystal display section 102 with a background that displays the time or time based on the output of the time generation section 104, a solar cell 103 that drives the time generation section 104 and the liquid crystal display section 102, and an operation for setting the time or time. Operation button 1 to perform
07. The liquid crystal display section 102 is a transparent liquid crystal section 1
05 and a liquid crystal character section 106 that displays numbers and characters. Since the time display device 101 is placed in the projection area 202, the liquid crystal display section 102 and operation buttons 107 are attached to the main body of the time display device 101, with the liquid crystal display section 102 and operation buttons 107 facing upward, and the solar cell 103 facing toward the bottom surface in the direction of the light source 206. ing. The image projection device 201 of this embodiment is a device that does not have a time display function.

Next, the operation will be explained. The presenter first places the time display device 101 at a corner of the projection area 202 of the image projection device 201. Next, use the operation buttons 107 on the time display device 101 to set the presentation time on the liquid crystal display 10.
Do it on 2nd. Further, at this time, since the solar cell 103 is facing toward the lower surface of the projection area 202, it receives light from the light source 206 to generate electricity to operate the liquid crystal display section 102 and the time generating section 104. By starting the time count with the operation button 107, the projection area 202
A time display projection 205 is displayed together with the presenter's manuscript image, allowing the presenter and the audience to know the elapsed time of the presentation at any time. Furthermore, by starting time counting using the operation button 107, the time can be known.

In the embodiment described above, the time or time is projected onto the projection area 202 in a normal display operation, but in addition to that, the liquid crystal display section 102 is used to show that the scheduled time has been exceeded.
It is also possible to make the liquid crystal character part 106 blink and project it on the projection surface 203, or to attach a buzzer to sound a warning sound. Further, the time display device 101 may be equipped with a rechargeable battery, and the battery may store electricity generated by the solar cell 103, so that the battery can be carried around as a watch when the image projection device 201 is not making presentations.

According to the above embodiment, since the image projection device and the time display device are separated, only the time display device can be carried around, and even if the image projection device does not have a time display function at the time of presentation, the image You can display the time simply by placing it on the projection area of the projection device. Furthermore, since the time display device is driven by a solar cell that generates power using the light from the light source of the image projection device, there is no need to prepare an external power source.

0012

As described above, according to the present invention, there is provided a time generating section that generates time or time, a transparent liquid crystal display section with a background that displays time or time based on the output of the time generating section, and a time generating section that generates time or time. A time display device is provided separately from the image projection device, and includes a solar cell that drives the liquid crystal display section and a liquid crystal display section. During projection, the time display device is placed in the projection area together with the document, and the time display device and the document image are placed on the projection surface together with the document image. Since the time or time is projected, even if an image projection device that does not have a built-in time display section is used, the time or time can be known from the above-mentioned time display device. People who own an image projection device that does not have a built-in time display will not need to purchase a new image projection device with a built-in time display if they want to display the time, and they can realize the time display function at a low cost. Effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of main parts of an image projection apparatus using a time display method according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of main parts of a conventional image projection device.

[Explanation of symbols]

101 Time display device 102 Liquid crystal display section 103 Solar cells 104 Time generation part 201 Image projection device 202 Projection area 203 Projection surface 206 Light source

Claims (1)

[Claims] Claim 1: An image projection device that projects an original placed on a projection area onto a projection surface, comprising: a time generation section that generates time or time; and a background that displays time or time based on the output of the time generation section. A time display device including a transparent liquid crystal display section and a solar cell for driving the time generation section and the liquid crystal display section is provided separately from the image projection device, and the time display device is provided separately from the image projection device during projection. 1. A time display method in an image projection device, characterized in that the image projection device is placed together with a document in an area, and the time or time is projected together with the document image onto the projection surface.