JPS6013382A - Display device - Google Patents

Abstract

PURPOSE:To confirm the state of a substance stored inside the body of an apparatus easily from the apparatus by projecting the image of the loaded substance. CONSTITUTION:A cassette 3 is illuminated by a light source 8 and the reflected light is passed through a plane merror 9, a concave mirror 10 and a convex lens 11 and the main image of the cassette 3 is formed on a screen 12. The plane mirror 9, the convex lens 11 and the screen 12 can be moved so as to be removed from a cassette loading course when the cassette 3 is to be loaded from the external into a holding device 2. Since the concave mirror 10 and the convex lens 11 are used, an image which is not also horizontally inverted is obtained. In addition, the image is formed on the screen 12 arranged on the front side of the cabinet 1, so that the state of the cassette 3 can be confirmed from any position on the front of the apparatus. The image can be also optionally magnified or reduced by designing the optical system properly.

Description

DETAILED DESCRIPTION OF THE INVENTION Page 2 INDUSTRIAL APPLICATION FIELD The present invention relates to a display device for electrical appliances such as video tape recorders, video discs, and the like.

Conventional Structures and Their Problems In recent years, a cassette loading method called front loading has come into use in VTRs. Figure 1 shows its configuration. In FIG. 1, 1 is a cabinet of a VTR, 2 is a cassette holding device provided in the cabinet, 3 is a cassette loaded therein, 4 is a cassette loading opening, and 5 is a cassette opening of the cabinet 1 so that the loaded cassette can be seen. A transparent part made of transparent resin etc. on the top surface,
6 represents the position of the cassette before loading, and 7 represents the loading path of the cassette.

In the above configuration, the cassette 6 passes through the cassette loading port 4 and is held at the position of the holding device 2 along the loading path 7. Now, in this state, there is no other way to check the condition of the tape inside the cassette 3 and the label on the surface of the cassette 3 other than to visually check it through the transparent part 5. Therefore, there is a problem in that it is not possible to check the entire cabinet 1 when other items are placed on top of the cabinet 1.

Purpose of the Invention The present invention solves the above-mentioned conventional problems.
It is an object of the present invention to provide a display device that can easily check the state of the tape, label, etc. of an object even when the object is loaded.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a screen on the front side of a device body, and a screen for forming a principal plane image of an object inside the device body on the screen inside the device body. It is characterized by providing an optical system and an optical system for illuminating the object. According to this configuration, by projecting an image of an object such as a loaded cassette on the screen, it is possible to easily check the state of the tape, label, etc. on the object from the front of the device.

DESCRIPTION OF EMBODIMENTS FIG. 2 shows an embodiment of the present invention. In the figure, 1 is a cabinet, 2 is a cassette holding device provided in the cabinet 1, 3 is a cassette loaded therein, 8 is a light source, 9 is a plane mirror, 1o is a concave mirror, 11 is a convex lens, 12 is a front surface of the cabinet 1 This is a screen set up.

In such a configuration, the cassette 3 is illuminated by the light source 8, and the reflected light is reflected by the plane mirror 9. Concave mirror 10° convex lens 1
1 and forms a main surface image of the cassette 3 on a screen 12. Here, plane mirror 9. Convex lens 11. Screen 12
When loading the cassette 3 into the holding device 2 from the outside,
It is movable so that it can be removed from the cassette loading path.

According to this embodiment, the concave mirror 10. By using the convex lens 11, an image without horizontal reversal can be obtained.

Furthermore, since the image is focused on the screen 12 provided on the front of the cabinet 1, the status of the cassette 3 can be checked from any position on the front of the device. Furthermore, by appropriately designing the optical system, image enlargement and 5-page reduction can be performed as desired. Furthermore, if the light source 8 is turned on only when the cassette 3 is loaded, it can be immediately confirmed that the cassette 3 is loaded. By changing the color of light emitted from the light source 8, other information can be displayed, and by using a transmissive liquid crystal display element for the screen 12, multiple display can be performed. Furthermore, it is possible to change the optical path using a plane mirror 9 or the like, and it is possible to set the screen at any position in front of the device.

Note that the convex lens 11 may be a Fresnel lens, in which case a short focal length can be achieved with a small-volume lens, thereby simplifying the internal configuration of the device.

Effects of the Invention As described above, according to the present invention, an optical system and a light source are provided inside the device main body, and an image of an object loaded into the device main body is formed on a screen provided on the front surface of the device main body. This has the advantage that it is possible to quickly check the status of objects inside the device main body.

[Brief explanation of the drawing]

Page 6 FIG. 1 is a schematic diagram of a conventional video tape recorder, and FIG. 2 is a schematic diagram of a video tape recorder according to an embodiment of the present invention. 1... Cabinet, 2... Cassette holding device, 3... Cassette, 8... Light source,
9...Flat mirror, 10...Concave mirror, 11...
...Convex lens, 12...Screen.

Claims (3)

[Claims] (1) A device body is provided with an object loaded therein so that its main surface faces the top surface, and a screen is provided on the front of the device body, and an image of the main surface of the object is mounted inside the device body. A display device comprising an optical system for forming an image on the screen and a light source for illuminating the object. (2) The optical system is characterized by being composed of one convex lens and one concave mirror so that the image of the object is focused on the screen without horizontally reversing it, and a plane mirror that positions the image of the object on its optical axis. A display device according to claim 1. (3) The display device according to claim 1, wherein the optical system is configured so that the image on the screen can be enlarged or reduced by changing its constant.