JP2000162702A - Projection type image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the supply of electric power from being stopped owing to user's carelessness by storing a power cord in a main body by a power cord winding means. SOLUTION: The projection type image display device 1 which displays an image by enlarging and projecting the output light of an image display means modulating incident light from at least a lighting means is composed of a cord reel device 10, a reel 11, a take-up drum 12, and the power cord 13. Then the power cord 13 is stored in the main body of the projection image display device 1 by the power cord take-up drum 12. For use, the power cord is drawn out of the main body and inserted into an outlet. Consequently, the connection of the power cord 13 on the main body side becomes unnecessary and the possibility that the supply of electric power is stopped during use owing to user's carelessness is eliminated. After the use, the power cord 13 can be stored in the main body, so it is never lost and the storage in transportation is made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a projection type image display device which displays a bright and large image.

[0002]

2. Description of the Related Art In recent years, the development of a projection type image display apparatus for enlarging and projecting output light of an image display element which modulates incident light such as a liquid crystal panel has been actively developed. Typical applications are for displaying images from a personal computer and normal video signals.There are also high-brightness types that are installed in large video halls, etc., but recently small-sized and highly portable types have been regarded as important. I have.
This is because, as a presentation tool, there is an increasing need to display images on a personal computer when going out or on a business trip.

When the projection type image display device is used outside, it is necessary to supply electric power and to input a video signal to the projection type image display device main body. Conventionally, a power cord for supplying power and a video cord for inputting a video signal of a personal computer are separately provided from the main body of the projection type image display device, and need to be connected to the main body each time the projector is used.

[0004]

In the case of a power cable, the power cable is usually inserted only into a socket. If the user does not insert the power cable sufficiently, there is a possibility that the power supply may be stopped during use. Was. As a result, the fan that cools the image display element and the light source is stopped, and the useful life may be shortened by the influence of heat. In particular, the connection of the projection type image display device body often becomes poor, but this is because the fitting between the socket and the power cord is tightly designed to avoid poor connection, so the insertion force is insufficient. Because it is not firmly inserted.

[0005] In addition, when inputting an image from a personal computer, most of the structure is such that a video code is inserted into a socket and fixed with screws, and preparation for use is complicated. Furthermore, since it is separated from the main body, it is difficult to store it during transportation, and portability has been impaired. In addition, there is a possibility that the cord is frequently lost during transportation or storage and cannot be used when necessary.

[0006] The present invention solves the above-mentioned problems, prevents a power supply from being stopped by carelessness of a user, and does not impair portability.
An object of the present invention is to provide a projection-type image display device that is easy to use.

[0007]

A projection type image display apparatus of the present invention displays an image by modulating at least an incident light from an illuminating means and an output light of the image displaying means. A projection type image display device, wherein a power cord is housed in a main body by a power cord winding means.

A projection type image display device according to a second aspect of the present invention displays an image by modulating at least an incident light from an illuminating means and projecting an output light of the image displaying means in an enlarged manner. A projection type image display device, wherein a video code for transmitting a video signal of an external signal source is stored in a main body by a video code winding means.

[0009]

(Embodiment 1) FIG. 1 is a projection type image display apparatus constructed as an embodiment of the present invention.
1 is a rear view, 10 is a cord reel device, 11 is a reel, 12
Is a winding drum, and 13 is a power cord. The code reel device 10 used in the projection type image display device of the present invention can have, for example, a structure described in Japanese Patent Application No. 63-237651. Further, for example, a structure disclosed in Japanese Utility Model Laid-Open No. 5-31757, Japanese Unexamined Patent Application Publication No. 8-259119, or the like can be employed.

In use, the power cord is pulled out of the main body and inserted into an outlet. According to the projection type image display device of the present invention, since the connection of the power supply cord on the main body side, which has conventionally been poorly connected, is not required, there is no possibility that the power supply is stopped during use by the carelessness of the user. .

Further, since the power cord can be stored inside the main body after use, there is no fear of loss and the storage during transportation is facilitated.

In the projection type image display device according to the present embodiment, a polarization modulation type such as a so-called liquid crystal light valve is used.
DMD advocated by Texas Instruments, USA
Any image display device that displays an image by modulating incident light, such as a light deflection type device, can be used.

(Embodiment 2) FIG. 2 is a rear view of a projection type image display apparatus 2 constructed as an embodiment according to the present invention, wherein reference numeral 20 denotes a cord reel device, 21 denotes a winding frame, and 22 denotes a take-up. Drum 23 is a video code. As the code reel device 20 used in the projection type image display device of the present invention, for example, the structure described in Japanese Patent Application No. 63-237651 can be used. For example, see Japanese Utility Model Application Laid-Open No. 5-31.
No. 757, JP-A-8-259119, and the like.

Most of the personal computers to be connected are IBM PC compatible machines (so-called DOS / V machines), Macintosh made by Apple Inc., and PC-98 compatible machines made by NEC Corporation. Since these methods have different connection systems, a conversion connector may be provided for the video code on the personal computer side, or a different video code may be provided. In each of these cases, a code reel device may be provided for each code as in the case shown in FIG. Further, a video code for a video signal can also be provided from the main body via the code reel device.

By providing not only the video code but also the audio code from the main body via the code reel device, it is possible to store the code inside the main body of the projection type image display device. Also in this case, similarly to the first embodiment, it is possible to prevent the supply of the signal during use from being inadvertently stopped when the user is connected, to facilitate portability, and to facilitate preparation for use.

The power cord can of course also be provided from the main body via the cord reel device.

Note that the projection type image display device according to the present embodiment also employs a polarization modulation type such as a so-called liquid crystal light valve.
DMD advocated by Texas Instruments, USA
Any image display device that displays an image by modulating incident light, such as a light deflection type device, can be used.

[0018]

According to the projection type image display apparatus of the present invention, the connection of the power supply cord on the main body side, which has often been poorly connected in the past, is unnecessary, so that the power supply is stopped during use by carelessness of the user. In addition, it is possible to prevent the life of the device from being shortened. Further, after use, the power cord can be stored inside the main body as in the case of a vacuum cleaner or the like.

Further, it is possible to prevent the supply of the signal during use from being stopped due to the carelessness of the user, to facilitate the preparation for use without impairing the portability.

[Brief description of the drawings]

FIG. 1 is a rear view of a projection type image display device according to an embodiment of the present invention.

FIG. 2 is a rear view of the projection-type image display device according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Projection type image display apparatus 10 Cord reel device 11 Reel frame 12 Winding drum 13 Power cord

Claims (2)

[Claims] 1. An image display means for modulating at least incident light from an illuminating means, and a projection type image display device for displaying an image by enlarging and projecting an output light from the image display means, wherein a power cord is a power supply. A projection-type image display device, wherein the projection-type image display device is housed in a main body by a cord winding means. 2. An image display device for modulating at least incident light from an illuminating device, and a projection type image display device for displaying an image by enlarging and projecting an output light of the image display device, the image display device comprising: A projection type image display device wherein a video code for transmitting a video signal is stored in a main body by a video code winding means.