JPH07218893A - Distributed projection type liquid crystal display device - Google Patents

Abstract

PURPOSE:To provide display at plural positions on one panel at low cost. CONSTITUTION:Light from a light source 12 is made incident on a transmissive liquid crystal display panel 11, the transmitted light b9 of the liquid crystal display panel 11 is made incident on two mirror surfaces 14a and 14b of a polygon mirror 14, a shield plate 16 is interposed between the right and left median lines of the liquid crystal display panel 11 and the continuous lines of the mirror surfaces 14a and 14b, and the transmitted light at the right half part of the liquid crystal display panel 11 and the transmitted light at the left half part are respectively reflected by the mirror surfaces 14a and 14b, further reflected forward by reflecting mirrors 21a and 21b and respectively projected on screens 17a and 17b by projection lenses 22a and 22b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applied, for example, to a display of a game machine, and is different in a plurality of places such as one panel.
Alternatively, the present invention relates to a display device capable of performing the same display and changing the display.

[0002]

2. Description of the Related Art In a game machine of a certain type, a display device for displaying figures, symbols, characters, etc. is provided at a plurality of positions on its game panel, and a display device corresponding to an intermediate result of a game, or all the display devices. The display on the display is changed. As a conventional display device of this type, a liquid crystal display or a cathode ray tube (CR
T) The display was provided for each. Therefore, it is relatively expensive. In particular, when a color liquid crystal display device having a relatively large display area is used, there is a problem that it becomes considerably expensive. There is a projection liquid crystal display device in which a small-sized color liquid crystal display device is used to make a large display by enlarging and projecting a display image of the color liquid crystal display device. Although this projection liquid crystal display device is relatively inexpensive, if the projection liquid crystal display device is provided at each place when displaying at a plurality of places like the game machine, it becomes expensive as a whole and space is reduced. It will be large.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection type liquid crystal display device which can display at a plurality of places and which can be constructed at a low cost and in a relatively small space.

[0004]

According to the present invention, a transmissive liquid crystal display panel for displaying an image is irradiated with light from a light source, the light transmitted through the liquid crystal display panel is incident on a polygon mirror, and the polygon mirror is Are reflected in different directions by the respective surfaces, and these reflected lights are projected by the projection lens means on the screens provided at different positions.

Each space between each surface of the polygonal mirror and each part of the liquid crystal display panel facing each other is optically separated from each other by a shielding plate, and projected as a projection lens means for each screen after the polygonal mirror. A lens is used. With this configuration, the display image on the liquid crystal display panel is divided into each part of the liquid crystal display panel and displayed on the corresponding screens.

Further, one projection lens is used in front of the polygon mirror as the projection lens means, and the optical path from each surface of the polygon mirror to each corresponding screen has the same length.
With this configuration, the same display image of the liquid crystal panel is displayed on each screen. Further, by using the shielding plate, the display image of the liquid crystal display panel is divided and reflected for each part facing each surface of the polygonal mirror, and the divided and reflected lights are respectively incident on the other polygonal mirrors. The projection lenses are respectively provided between the polygonal mirrors which are reflected by the mirrors in different directions and reach the respective different screens to divide the display image, and the respective polygonal mirrors on which the respective divided display images are incident. A projection lens is provided as means, and the same divided image is projected on each screen in common for each polygon mirror.

[0007]

FIG. 1 shows an embodiment of the present invention. Light 13 is projected from the light source 12 onto the rear surface of the transmissive liquid crystal display panel 11. The liquid crystal display panel 11 includes a drive circuit and displays an image corresponding to an image signal supplied from the outside. A polygonal mirror 14 is provided so as to face the front surface of the liquid crystal display panel 11. In this example, two rectangular mirror surfaces 14
a and 14b contact one edge thereof and are connected to each other at an angle of approximately 270 degrees to form a two-sided polygon mirror 14.
This is a case where 4a and 14b are arranged in the left-right direction of the liquid crystal display panel 11. Each surface 14a, 14b of the polygon mirror 14,
The portions 15a, 1 of the liquid crystal display panel 11 facing these
The space between 5b and 5b is optically separated by the shielding plate 16.
That is, one end of the shielding plate 16 is in contact with a line that divides the front surface of the liquid crystal display panel 11 into left and right parts, and the other end of the shielding plate 16 is in contact with a connecting line between the mirror surfaces 14a and 14b.

Therefore, as shown in FIG. 2A, a circular image and a rhombus image are formed on the display surface 15 of the liquid crystal display panel 11 so as to be arranged side by side, that is, a rhombus image is formed on the right half portion 15a of the display surface 15. When a circular image is displayed on each of the left half portions 15b, the image of the portion 15a is displayed on the mirror surface 14a and the portion 1
The image of 5b is projected on the mirror surface 14b by the transmitted light of the liquid crystal display panel 11.

The light transmitted from the liquid crystal display panel 11 and reaching the polygon mirror 14 has respective mirror surfaces 14a and 14b of the polygon mirror 14.
Are reflected in different directions and are projected on the screens 17a and 17b provided at different places. In this example, semi-transparent screens 17a and 17b, which are light-scattering surfaces so as to cover openings 19a and 19b formed in the game panel board 18 of the game machine, which are arranged on the opposite side of the polygonal mirror 14 from the liquid crystal display panel 11, are formed. Are attached to the panel plate 18. The reflected lights 20a and 20b from the mirror surfaces 14a and 14b of the polygon mirror 14 are reflected by the liquid crystal display panel 11 and the polygon mirror 1, respectively.
4 is incident on the reflecting mirrors 21a and 21b, which are provided at an angle of about 45 degrees to each other,
Each is reflected forward, and these reflected lights are projected onto the projection lens 2.
2a and 22b project and form images on the screens 17a and 17b. Therefore, the right half display image and the left half display image of the liquid crystal display panel 11 are separately displayed on the screens 17a and 17b as shown in FIGS. 2B and 2C.

The display image on the liquid crystal display panel is divided into four,
In order to project and display each of the divided images on another screen, for example, the configuration as shown in FIGS. 3 and 4 may be adopted. 3 and 4, parts corresponding to those in FIG. 1 are designated by the same reference numerals, and FIG. 4 is a sectional view taken along line II in FIG.
As in the case of FIG. 1, the projected image from the liquid crystal display panel 11 is divided into two parts, left and right, by the polygon mirror 14 and the shielding plate 16. Further, since the reflected light from the polygon mirrors 14a and 14b is reflected by the reflection mirrors 21a and 21b and is divided into upper and lower parts by the polygon mirrors 24a and 24b, in this embodiment, the reflection mirror 2 is shown in FIG.
As shown on the 1a side, the reflecting mirror 21a is a polygon mirror 14
2 mirror surfaces 24aa, 24ab similar to the above, and a shield plate 25a is interposed between the mirror surfaces 24aa, 24ab and the upper and lower midlines of the reflecting mirror 21a, and the upper and lower middle surfaces of the mirror surface 14a and the reflecting mirror 21a. The shield plate 27a is interposed between the lines,
The upper reflected light and the lower reflected light of the mirror surface 14a, that is, the upper reflected light and the lower reflected light of the reflecting mirror 21a are respectively reflected on the mirror surface 24.
Reflects upward and downward at aa and 24ab. The upper and lower reflected lights are reflected by the reflecting mirrors 26aa and 26ab, respectively.
Is reflected forward by the projection lens 22aa, 22ab and projected on the screens 17aa, 17ab, respectively.

Although not shown in the drawing, also on the side of the reflecting mirror 21b, the polygon mirror 24b and the shielding plates 25b and 27b similarly make it possible to reflect the respective reflected lights of the upper and lower portions of the mirror surface 14b, that is, the upper and lower portions of the reflecting mirror 21b. Each of the reflected lights is reflected upward and downward, is reflected forward by the reflecting mirrors 26ba and 26bb, and is further projected on the screens 17ba and 17bb by the projection lenses 22ba and 22bb. With this structure, the display surface 15 of the liquid crystal display panel 11 is displayed.
For example, as shown in FIG. 5A, when a rhombus image is displayed in the upper right portion 15aa, an X-shaped image is displayed in the lower right portion 15ab, a circular image is displayed in the upper left portion 15ba, and a square image is displayed in the lower left portion 15bb, The shield plate 16 and the polygon mirror 14 include the right side portion 15aa,
The transmitted light of 15ab and the transmitted light of the left side portions 15ba, 15bb are separated, and the transmitted light of the right side portions 15aa, 15ab are transmitted by the shielding plates 27a, 25a and the polygon mirror 24a and the transmitted light of the upper right portion 15aa and the lower right portion. The transmitted light of the portion 15ab is separated and enlarged and projected on the upper right screen 17aa and the lower right screen 17ab as shown in FIGS. 5B and 5C. Separated left side portions 15ba, 15b
The transmitted light of b is separated into the transmitted light of the upper left portion 15ba and the transmitted light of the lower left portion 15bb by the shielding plates 27b and 25b and the polygon mirror 24b, and as shown in FIGS. 5D and 5E, the upper left screen 17ba and the lower left screen 17bb. Are enlarged and projected respectively. If necessary, the shielding plates 25a and 27a, or 25b and 27b may be integrally formed.

In the above, the display surface 15 of the liquid crystal display panel 11 is used.
I divided the above parts and displayed them on different screens,
The entire display image on the display surface 15 may be displayed on a plurality of distant screens. An example thereof is shown in FIG. 6 with the same reference numerals attached to the portions corresponding to those in FIG. In this case, the shielding plate 16 and the projection lens 2 are different from those in FIG.
2a and 22b are omitted, and one projection lens 22 is inserted between the liquid crystal display panel 11 and the polygon mirror 14. The optical path lengths from the mirror surfaces 14a and 14b of the polygon mirror 14 to the corresponding screens 17a and 17b are the same.

Although not specifically described in the above-mentioned embodiments, the light transmitted through the liquid crystal display panel 11 is scattered light, which is magnified by the projection lens 22 and is reflected by the polygon mirror 14 as shown in FIG. 7A. It is incident. As shown in FIG. 7A, the light transmitted through each part of the liquid crystal display panel 11 has mirror surfaces 14a and 14a.
Reach any of b. This reaching light is reflected on the mirror surfaces 14a, 14
It is reflected by b, respectively, is further reflected forward by the reflecting mirrors 21a and 21b, and is projected on the screens 17a and 17b. The display image of the liquid crystal display panel 11 is projected by the projection lens 22 on the screens 17a and 17b as an image in which the left, right, top and bottom are interchanged. Therefore, if the display image on the display surface 15 of the liquid crystal display panel 11 is, for example, a circular image and a rhombic image arranged side by side as shown in FIG. 7B, the screens 17a and 17b are as shown in FIGS. An image in which the circular image and the diamond image are left and right interchanged is displayed.

Also in the configurations shown in FIGS. 3 and 5, the shielding plates 16, 25a, 25b, 27a, 27b and the projection lenses 22aa, 22ab, 22ba, 22bb are omitted.
If the projection lens 22 is inserted between the liquid crystal display panel 11 and the polygon mirror 14 as in FIG. 6, four screens 17aa are obtained by switching the left, right, top and bottom of the display image on the liquid crystal display panel 11. It is displayed on 17ab, 17ba, and 17bb.

An example of projecting and displaying one half and the other half of the display image of the liquid crystal display panel on a plurality of screens is shown in FIGS. 8 and 9, and parts corresponding to those in FIGS. 3 and 4 are designated by the same reference numerals. . That is, FIGS. 8 and 9 are different from FIGS. 3 and 4 in that the shielding plates 25a, 25b, 27a and 27b, and the projection lens 22a.
a, 22ab, 22ba, 22bb are omitted, and the projection lens 22a is inserted between the reflecting mirror 21a and the polygon mirror 24a, and the projection lens 22b is inserted between the reflecting mirror 21b and the polygon mirror 24b. Each mirror surface 24aa, 24ab of the polygon mirror 24a
The optical paths from the screens 17aa, 17ab to the screens 17aa, 17ab are the same, and the mirror surfaces 24ba, 2 of the polygon mirror 24b are
The optical paths from 4bb to the screens 17ba and 17bb have the same length.

According to this configuration, when an image as shown in FIG. 5A is displayed on the display surface 15 of the liquid crystal display panel 11, the light transmitted through the right side portions 15aa and 15ab and the left side portions 15ba and 15bb are displayed. Of the transmitted light of the right side portions 15aa and 15ab which are separated by the shielding plate 16 and the polygonal mirror 14 are projected from the reflecting mirror 21a to the polygonal mirror 24a by the projection lens 22a, and the mirror surface 24aa, Divided into two directions by 24ab,
Reach the screens 17aa and 17ab via the reflecting mirrors 26aa and 26ab, respectively, and the upper right and lower right screens 1
As for 7aa and 17ab, as shown in FIGS. 10A and 10B, respectively, the right half of the display surface (FIG. 5A) is enlarged and the left side, the right side, the upper side, and the lower side are interchanged. Similarly, the left half of the display surface 15 is displayed on the screen 17 as shown in FIGS.
to both ba and 17bb by the projection lens 22b on the left,
The right, top, and bottom are swapped and displayed enlarged.

It is also possible to display the upper half image and the lower half image of the display surface 15 of the liquid crystal display panel 11 on a plurality of screens. Examples thereof are shown in FIG. 11 and FIG.
The parts corresponding to those in FIG. 4 are designated by the same reference numerals. 3 and 4 is that the shielding plate 16 is eliminated and a shielding plate 28 is added instead. The shielding plate 28 divides the display surface 15 of the liquid crystal display panel 11 into upper and lower parts.
It may be arranged between the liquid crystal display panel 11 and the polygon mirror 14 and integrated with the shield plates 27a and 27b. According to this configuration, the light transmitted through each part of the display surface 15 of the liquid crystal display panel 11 is shielded by the shield plates 25a, 25b, 27a, 27b, 2 and 2.
The upper and lower parts are divided into two by 8 and polygon mirrors 24a, 24
b and the upper part 15aa of the display surface 15,
The transmitted light of 15ba and the transmitted light of the lower portions 15ab and 15bb are separated into the projection lenses 22aa, 22ba and 2a.
The upper screen 17 is formed by 2ab and 22bb, respectively.
aa, 17ba and lower screens 17ab, 17bb. Therefore, in the case where the display image on the display surface 15 is the example shown in FIG. 5A, the screens 17aa, 17ab, 17b
The displays as shown in FIGS. 13A, 13B, 13C and 13D are obtained for a and 17bb. Such a display can be obtained in the same manner if the left and right are the vertical directions in the configurations of FIGS.

In each of the embodiments shown in FIG. 1, the display surface 1
Although the right side portion and the left side portion of 5 are separated and projected and displayed on the respective screens, the upper portion and the lower side portion of the display surface 15 may be separated and projected and displayed on the different screens. The display image of the liquid crystal display panel 11 does not necessarily have to be enlarged when projected on the screen. Also, the screens described above do not necessarily have to be on the same plane.

[0019]

As described above, according to the present invention, the display image of the liquid crystal display panel can be divided and projected and displayed on separate screens, or the entire display image of the liquid crystal display panel can be separated from each other. It can be displayed on a plurality of screens, or a display image on the liquid crystal display panel can be divided and each divided image can be projected and displayed on a plurality of screens. Therefore, the cost can be reduced as compared with the case where a liquid crystal display, a CRT display, etc. are separately provided on each screen.

In the case of the divided display, a plurality of image signals obtained by combining various images are prepared, and in other cases, a plurality of different image signals are prepared. For example, when the present invention is applied to a game machine, an intermediate result of the game is obtained. According to the above, the image signal supplied to the liquid crystal display panel can be switched to switch the image displayed on the screen. In particular, in the case of color display, it is possible to enlarge and display on a plurality of screens by using an inexpensive small liquid crystal display panel 11, which is far better than the case where a color liquid crystal display panel of that size is used at each screen position. It can be constructed at low cost. Further, it is possible not only to construct at a low cost as compared with a case where a small liquid crystal display panel is provided for each screen to perform enlarged projection, but also to reduce the space occupation rate.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment to which the present invention is applied when a display image on a liquid crystal display surface is separated and projected on another screen.

FIG. 2A is a diagram showing an example of a display image on a liquid crystal display surface, B,
C is a screen 17a corresponding to the display image of A,
It is a figure which shows the projection display image on 17b.

FIG. 3 shows a display image on a liquid crystal display surface which is divided into four and separated into four.
The top view which shows the Example to which this invention is applied, when projecting on one screen.

FIG. 4 is a side view taken along the line I-I in FIG.

5A is a diagram showing an example of a display image on a liquid crystal display surface, and B to E are screens 17a corresponding to the display images of A, respectively.
It is a figure which shows each projection display image on a, 17ab, 17ba, 17bb.

FIG. 6 is a plan view showing an embodiment to which the present invention is applied when an image on a liquid crystal display surface is similarly projected and displayed on a plurality of screens.

7A is a diagram showing how transmitted light from a liquid crystal display panel 11 reaches a polygonal mirror, FIG. 7B is a diagram showing an example of a display image on a liquid crystal display face, and C and D are the examples of FIG. Screen 17a corresponding to the liquid crystal display image of FIG. 7B in FIG.
It is a figure which shows the projection image on 17b.

FIG. 8 is a plan view showing an embodiment to which the present invention is applied when a display image on a liquid crystal display surface is divided and the divided images are displayed on a plurality of screens.

9 is a side view taken along the line II-II of FIG.

FIG. 10 is a diagram showing an example of images projected and displayed on screens 17aa, 17ab, 17ba, 17bb in the embodiments shown in FIGS. 8 and 9;

FIG. 11 is a plan view showing another embodiment to which the present invention is applied when a display image on a liquid crystal display surface is divided and the divided images are projected and displayed on a plurality of screens.

FIG. 12 is a side view seen in the direction of the line Φ-Φ of FIG. 11.

FIG. 13 is a screen 17a in the embodiment of FIG.
The figure which shows the example of the image projected and displayed on a, 17ab, 17ba, and 17bb.

Claims (7)

[Claims] 1. A transmissive liquid crystal display panel for displaying an image, a light source for making light incident on the liquid crystal display panel, and a polygonal mirror for receiving transmitted light from the liquid crystal display panel and reflecting the light in different directions. And a projection lens means for projecting light reflected by the polygon mirror in different directions to respective screens provided at different positions, and a dispersion projection type liquid crystal display device. 2. A liquid crystal display device according to claim 1, wherein the liquid crystal display panel and the polygonal mirror are interposed, and the mirror surfaces of the polygonal mirror and the respective parts of the liquid crystal display panel facing the mirror surfaces are arranged. A shielding plate that optically separates the spaces between them is provided, and a projection lens is provided for each of the screens after the polygon mirror as the projection lens means. 3. The liquid crystal display device according to claim 2, wherein the separating plate optically separates the space by the shielding plate and the polygonal mirror and emits the light in different directions, and the separating means has different directions. Are provided in cascade on the optical paths of the light reflected by the. 4. The liquid crystal display device according to claim 1, wherein the optical path lengths of the respective mirror surfaces of the polygonal mirror and the corresponding screens are made equal to each other, and the projection lens means is provided in the preceding stage of the polygonal mirror. It is one projection lens. 5. The liquid crystal display device according to claim 4, wherein another polygon mirror is provided in a path of light reflected by the polygon mirror in directions different from each other, and the polygon surfaces of the other polygon mirrors move in directions different from each other. Is reflected. 6. The liquid crystal display device according to claim 1, wherein a shield plate is provided between the liquid crystal display panel and the polygonal mirror to optically separate the passage between them for each mirror surface of the polygonal mirror. A projection lens serving as the projection lens means is provided in each of the paths of the light beams separated and reflected by the polygon mirror, and another polygon mirror is provided at the rear stage of each projection lens. Are reflected in different directions to reach the different screens. 7. The liquid crystal display device according to claim 1, wherein a shield plate having a surface substantially perpendicular to the mirror surface of the polygon mirror is provided between the liquid crystal display panel and the polygon mirror, and the shield plate serves as the shield. A passage between the liquid crystal display panel and the polygon mirror is optically separated, and another polygon mirror is arranged in each of the passages of the lights reflected by the polygon mirror in different directions. In order to maintain the above-mentioned optical separation state in the optical path reaching the optical path, the shield plates for optically separating the respective mirror surfaces of the other polygon mirrors are respectively provided, and are separated from the other polygon mirrors and are different from each other. For each light reflected in the direction, a different projection lens is provided as the projection lens means.