JPH06308477A - Display device - Google Patents

Abstract

PURPOSE:To prevent the influence of external light and to enhance the contrast ratio of a transmission image to a reflected image by arranging a louver layer on the front surface of a transmission image forming means or a reflected image forming means. CONSTITUTION:A liquid crystal display element 1 as the transmission image forming means and a three-dimensional object 2 as the reflected image forming means are arranged in an L-shaped state. A half mirror 3 is arranged as a synthesizing means at the angle of 45 degrees in order to synthesize the image of the liquid crystal display element 1 and the three-dimensional object 3; furthermore, the louver layer 8 is arranged on the front surface of the three- dimensional object 2. The louver layer 8 is an optical control member, absorbs oblique light having an angle component, and transmits the light made nearly perpendicularly incident on the louver layer 8. In this case, since the external light is absorbed by the louver layer 8, the three-dimensional object 2 is not illuminated, so that the reflected image is not formed and an observer 4 does not observe the reflected image. The light reaching the observer 4 is absorbed by the louver layer 8 even in the case the light 7 illuminating the three- dimensional object 2 is turned on and the reflected image is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying a composite image of a transmitted image and a reflected image.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 60-84573 is known as a display device for displaying a composite image of a transmitted image and a reflected image. A mirror called a half mirror or a beam splitter was used to combine the transmitted image and the reflected image. Therefore, both images are always observed. Therefore, in order to display or hide one image, when the image forming means is a substance, the illumination light is turned on.
In the image display device such as a CRT, the image itself is displayed / hidden by / off.

[0003]

However, when the above-mentioned conventional technique is used, external light enters the image forming means and is further reflected to reach the viewer. Therefore, in the case of displaying a substance, even if the illumination is turned off, it is illuminated by outside light, and it is difficult to perform only one display. Further, when the image forming means for displaying is a liquid crystal display device, a CRT or the like, the contrast ratio of the displayed image is also lowered due to surface reflection.

Further, the reflected image must be reflected by the synthesizing means to reach the eyes of the viewer, but there is a problem that it directly reaches the eyes of the viewer.

Therefore, the present invention solves such a problem, and its object is to be free from the influence of external light, have a high contrast ratio between a transmitted image and a reflected image, and enable high-quality display. A display device is provided.

[0006]

A display device of the present invention is a display device comprising means for forming a transmission image, means for forming a reflection image, and means for synthesizing a transmission image and a reflection image. Means for forming a transmission image,
A louver layer is disposed on the front surface of at least one of the means for forming the reflection image.

Further, the display device of the present invention is a display device comprising means for forming a transmission image, means for forming a reflection image, and means for combining the transmission image and the reflection image, wherein the transmission image is formed. A shutter layer is arranged on the front surface of at least one of the means and the means for forming the reflection image.

Further, the display device of the present invention is a display device comprising means for forming a transmission image, means for forming a reflection image, and means for synthesizing the transmission image and the reflection image, wherein the transmission image is formed. A shutter layer is arranged in front of the means, and a louver layer is arranged in front of the means for forming the reflection image.

The display device of the present invention is characterized in that the shutter layer is a liquid crystal panel.

Further, the display device of the present invention is characterized in that the shutter layer is capable of partially changing a transmissive portion and a non-transmissive portion.

Further, the display device of the present invention is characterized in that at least one of the means for forming the transmission image and the means for forming the reflection image is a liquid crystal display element.

[0012]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a display device 100 of the present invention. Liquid crystal display element 1 as transmission image forming means
Then, the three-dimensional object 2 is arranged so as to have an L shape as a reflection image forming means. A half mirror 3 is arranged as a combining means at an angle of 45 degrees so that the images of the liquid crystal display element 1 and the three-dimensional object 2 can be combined.

The liquid crystal display element 1 is of a transmissive type and controls the light from the light source 6 to perform display to form a transmissive image. The three-dimensional object 2 is
A reflected image is formed only when illuminated by the illumination light 7.

The half mirror 3 is formed by depositing a thin film of titanium oxide on a glass plate having a thickness of about several millimeters. Note that the transmittance and reflectance are the liquid crystal display element 1 and the three-dimensional object 2 to be arranged.
It is decided by the brightness of. If the ratio of the transmittance and the reflectance is too different, the brightness of the two images to be combined remarkably differs, resulting in an unnatural combined image.

From the observation window 5 of the display device 100, the image of the liquid crystal display element 1 and the image of the three-dimensional object 2 are observed by the observer 4 in an overlapping manner. For example, if the image of the liquid crystal display element 1 is a clown and the three-dimensional object 2 is a ball, it is observed that the clown is dancing on a three-dimensional ball. At this time, the distance from the viewer 4 to the liquid crystal display element 1 and the three-dimensional object 2 is almost equal.

A louver layer 8 is arranged on the front surface of the three-dimensional object 2. As shown in FIG. 2, the louver layer 8 has light-transmissive layers 9 and light-absorbing layers 10 alternately stacked. Alternatively, the light-absorbing layers 10 may have a lattice shape or a honeycomb shape. Generally made of plastic mold.

The louver layer 8 is a light control member, which absorbs oblique light having an angular component and transmits light which is incident on the louver layer 8 near vertically. By setting the thickness and the pitch, it is possible to freely determine the angular component of the absorbed light. If the aperture ratio between the light transmitting layer 9 and the light absorbing layer 10 is increased, the attenuation of the amount of transmitted light can be suppressed.

When the illumination light 7 is not lit and a reflected image of the three-dimensional object 2 is not formed, if the louver layer 8 is not provided, outside light is observed through the observation window 5.
Is incident on the three-dimensional object 2 (see FIG. 1A), and the three-dimensional object 2 is illuminated to form a reflected image, which is reflected by the half mirror 3 and reaches the viewer 4. . However, external light is absorbed by the louver layer 8 and does not illuminate the three-dimensional object 2, so that no reflected image is formed and the viewer 4 does not observe it.

When the illumination light 7 of the three-dimensional object 2 forms a reflected image when the three-dimensional object 2 is turned on, the image of the three-dimensional object 2 reaches the viewer 4 directly without the louver layer 8 (see FIG. )reference).
However, since the light reaching the viewer 4 is absorbed by the louver layer 8, the reflected image is not directly observed.

Here, the reflection image forming means is the liquid crystal display element 1.
In the case of an electronic display such as a CRT or a CRT, external light is reflected on the surface to reduce the contrast ratio of the image, but since the external light is cut by the louver layer 8, there is no such problem.

As the transmission image forming means and the reflection image forming means, the liquid crystal display element 1 and the three-dimensional object 2 may be replaced with each other. In addition to this, a CRT or an electronic display may be used, and the means for forming a transmission image and a reflection image may be light O.
Anything will do as long as it is N / OFF.

Further, by disposing the louver layer 8 on the front surface of the transmission image forming means, the influence of external light on the transmission image can be minimized.

(Embodiment 2) Another embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram of the display device 100 of the present invention. The three-dimensional object 2 as the transmission image forming means and the liquid crystal display element 1 as the reflection image forming means are arranged so as to have an L shape. A half mirror 3 is arranged as a combining means at an angle of 45 degrees so that the images of the liquid crystal display element 1 and the three-dimensional object 2 can be combined. The image of the liquid crystal display element 1 and the image of the three-dimensional object 2 are observed by the observer 4 through the observation window 5 in an overlapping manner.
The light source 6 and the illumination light 7 are the same as in the first embodiment.

On the front surface of the three-dimensional object 2, a liquid crystal shutter 11 is arranged as a shutter layer. As the configuration of the liquid crystal shutter 11, a general liquid crystal panel using a polarizing plate and utilizing the optical rotation of TN liquid crystal was used. Any type of liquid crystal panel may be used as long as it can transmit and block light.

When the illumination light 7 is not turned on and a transmission image of the three-dimensional object 2 is not formed, outside light enters the three-dimensional object 2 through the observation window 5 without the liquid crystal shutter 11 (see FIG. 3A). The three-dimensional object 2 is illuminated to form a transmission image, and the image passes through the half mirror 3 and reaches the viewer 4. However, if the liquid crystal shutter 11 is closed when the transmission image is not formed, external light is absorbed and the three-dimensional object 2 is not illuminated, so that the transmission image is not formed and the viewer 4 does not observe.

Assuming that the illumination light 7 is a general illumination (so-called light bulb), it takes some time to turn on / off, but by using the liquid crystal shutter 11, the light is instantly (mm).
There is also an advantage that it can be turned ON / OFF (below the order of ec).

If the liquid crystal shutter 11 is configured not only to control the entire surface but also to partially control the transmissive portion and the non-transmissive portion, the three-dimensional object 2 can also be partially displayed or not displayed. Therefore, the display effect can be enhanced.

Although the liquid crystal shutter 11 is used in this embodiment, a mechanical type shutter may be used as long as it is a shutter that transmits or blocks light.

Further, by disposing the liquid crystal shutter 11 in front of the reflection image forming means, the influence of external light on the reflection image can be suppressed to the minimum, and the above-mentioned effect can be obtained.

The liquid crystal display element 1 and the three-dimensional object 2 may be replaced with each other as the transmission image forming means and the reflection image forming means. In addition to this, a CRT or an electronic display may be used, and any means for forming a transmission image and a reflection image may be used as long as light is turned on / off.

(Embodiment 3) Another embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a block diagram of the display device 100 of the present invention. The basic arrangement is in accordance with the second embodiment described above, and the transmission image formation is performed on the liquid crystal display element 1 as the reflection image formation means, the three-dimensional object 2 as the transmission image formation means, and the half mirror 3 for combining two images. A liquid crystal shutter 11 is arranged in front of the means, and a louver layer 8 is arranged in front of the reflection image forming means.

The observer 4, the observation window 5, the light source 6, and the illumination light 7 are the same as those in the above-mentioned embodiments.

In general, when the liquid crystal shutter 11 has a high contrast ratio with respect to light in the vertical direction, light is transmitted in an oblique direction. Light leaks into. Further, since the polarizing plate is used, the brightness of the image is lowered and the price is high.

Since the louver layer 8 is good at blocking oblique light but transmits front light, when it is placed in front of the transmission image forming means, external light is reflected on the surface of the transmission image forming means. It reaches the viewer 4.

In FIG. 4, the liquid crystal display element 1 has an observation window 5
Since it is arranged in the back from, a lot of light close to the front light enters the liquid crystal display element 1. Further, a large amount of external light is obliquely incident on the reflection image forming means. (See FIG. 4 (A)) The present invention is most effectively configured in consideration of these points. According to the above configuration, the influence of external light on the transmitted image and the reflected image can be prevented, and the reflected image is not observed directly (see FIGS. 4A and 4B). Furthermore, such a display device 100 can be realized brightly and at low cost.

The liquid crystal display element 1 and the three-dimensional object 2 may be replaced with each other as the transmission image forming means and the reflection image forming means. In addition to this, a CRT or an electronic display may be used, and any means for forming a transmission image and a reflection image may be used as long as light is turned on / off.

[0040]

As described above, according to the present invention, by disposing the louver layer or the shutter layer in front of the transmission image forming means or the reflection image forming means, the influence of outside light is prevented and the transmission image and the reflection image are reflected. This has the effect of increasing the contrast ratio of the image.

Since the reflected image does not reach the viewer directly, it is possible to provide a display device capable of high-quality display.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a display device of the present invention.

FIG. 2 is a perspective view of a display device louver layer of the present invention.

FIG. 3 is a configuration diagram showing another embodiment of the display device of the present invention.

FIG. 4 is a configuration diagram showing another embodiment of the display device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display element 2 Three-dimensional object 3 Half mirror 4 Viewer 5 Observation window 6 Light source 7 Illumination light 8 Louver layer 9 Light transmission layer 10 Light absorption layer 11 Liquid crystal shutter 100 Display device

Claims (6)

[Claims] 1. A display device comprising: a means for forming a transmission image, a means for forming a reflection image, and a means for synthesizing a transmission image and a reflection image, and a means for forming the transmission image and the reflection image. A louver layer is disposed on the front surface of at least one of the means for forming a display device. 2. A display device comprising means for forming a transmission image, means for forming a reflection image, and means for synthesizing the transmission image and the reflection image, the means for forming the transmission image and the reflection image. A display device, characterized in that a shutter layer is disposed on the front surface of at least one of the means for forming. 3. A display device comprising means for forming a transmission image, means for forming a reflection image, and means for synthesizing the transmission image and the reflection image, wherein a shutter layer is provided in front of the means for forming the transmission image. And a louver layer is disposed in front of the means for forming the reflection image. 4. The display device according to claim 2, wherein the shutter layer is a liquid crystal panel. 5. The display device according to claim 2, wherein the shutter layer has a transmissive part and a non-transmissive part partially replaced with each other. 6. The display according to claim 1, wherein at least one of the means for forming the transmission image and the means for forming the reflection image is a liquid crystal display element. apparatus.