JPH0216390Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a display device that can display two images in a multiplexed manner on a display surface, thereby making it possible to display contents more sophisticatedly and effectively.

In conventional display devices, as shown in FIG. 4, a television video signal is used to add a specific mark or the like to a part of the entire screen image projected on the display surface (screen) 1. A synthesizer 3 synthesizes the output signal of the video signal generator 1, which generates the entire image, with the output signal of the video signal generator 2, which generates specific marks, etc., and this synthesized output signal is transmitted to a video projector 4, etc. It was projected onto display screen 5.

These techniques use television video signals and are therefore limited by the number of scanning lines, so especially when constructing a large display screen, the image quality is poor and precise images cannot be obtained. Another disadvantage is that the storage device for storing a large number of image signals, the video signal generator, the video projector, etc. are very expensive and lack economic efficiency.

In order to eliminate the above-mentioned drawbacks, this invention uses a film-type projection display to draw the display screen with high precision, and simultaneously projects two projected images on one display screen to identify a single image. An object of the present invention is to economically provide a multiple display device that can make display contents more advanced and effective by configuring it so that predetermined symbols, etc. can be easily added to certain positions. It is.

Also, according to this invention, since a film capable of high-density photography is used that can accommodate a large number of photography scenes on one film, each frame can be selected at high speed. .

This invention consists of two sets of selective projection means that arbitrarily and directly select any one screen from a high-density photographic film containing a large number of photographic screens in a high density on one film, and project each screen onto the screen. , and projection means for multiplexing and projecting images from the two sets of selective projection means on the screen.

Next, an embodiment of this invention will be described with reference to the drawings.

FIG. 3 shows an embodiment of this invention, and 11 and 12 are selective projectors, and 13 is a projection screen, which constitute the basic structure of the invention as shown in FIG. 14 and 15 are selection control circuits for selecting the selection projectors 11 and 12, respectively; 16 is a search control circuit for searching for frames on the film to be selected by the selection projectors 11 and 12 according to various input conditions. .

Next, the operation shown in FIG. 3 will be specifically described using a map search as an example. First, a large number of various maps are photographed on the film built into the selection projector 11, and a large number of circles corresponding to each position on the projection screen are shown on the film built into the selection projector 12. It is assumed that the photograph has been taken. When a command to display the location of a particular town is input to the search control circuit 16 manually or by other input means, the search control circuit 16 searches a map of a city centered around the commanded town.
As a result of the search, the position of the frame on the film of the map is determined, and this determination result is provided to the selection projector 11 via the selection control circuit 14, and the map of the selected city is projected onto the projection screen 13.

On the other hand, at the same time, the search control circuit 16 adds a circle mark to the part of the target town on the city map projected by the selection projector 11. The position of the frame on the film is determined, and the result of this determination is provided to the selection projector 12 via the selection control circuit 15, and the circle mark of the selected frame is projected onto the projection screen 13.

Here, in the present invention, a film capable of high-density photography is used as the film. This film can accommodate a large number of screens on one film, as shown in FIG. For example, the external dimensions of the film c, d
are each 160mm, and the film screen dimensions e and f are 150mm.
If one screen is shot at 3 mm square, a total of 2,500 screens can be stored on one sheet of film. As a result, the display indicating the above-mentioned specific position can be arbitrarily set in 2500 different locations on the screen. Therefore, in the example shown in Fig. 4, when selecting a specific screen on the film, even if the screen with the longest moving distance is selected, the screen can be selected arbitrarily and linearly, so the moving distance is at most.
It is only 212mm and can be selectively moved at very high speed. On the other hand, if conventionally used films were to be used in the present invention, the size and number of films would be enormous, making it practically impossible to display positions in detailed locations as in the present invention. be.

As a result of the above, a map of the city including the target town is projected on the projection screen, and a circle mark is added to the town at the same time, so that the viewer can easily know the location of the town.

The above-mentioned information is effective when used mainly for purposes such as confirming the location of a fire at a fire station and confirming the scene of an incident at a police station.

As explained above, this invention uses a projection display to enlarge and display an image taken on a film capable of high-density photography, so that the display screen can clearly project the image down to the smallest detail. In addition, by using two projection displays of the same type, predetermined symbols, etc. can be easily superimposed on specific positions on the display screen, making the displayed content more effective for visual viewers. This has the effect of making it economically viable to provide the same. In other words, by arranging frames vertically and horizontally on a single film to achieve high density, and by selecting these frames through a two-dimensional search operation, it is possible to create large No need for number of pods, quick,
It also enables precise operation.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the prior art, Fig. 2 is a basic block diagram of this invention, Fig. 3 is a block diagram showing an embodiment of this invention, and Fig. 4 is a diagram showing a film used in this invention. be. 11, 12...selection projector, 13...projection screen,
14, 15...Selection control circuit, 16...Search control circuit.

Claims (1)

[Scope of utility model registration request] two sets of selective projection means for arbitrarily and directly selecting any one screen from a high-density photographic film containing a large number of photographic screens with high density on one film, and projecting the selected screen on each screen; and projection means for multiplexing and projecting images from a set of selected projection means on the screen.