JP2885284B2 - Three-dimensional liquid crystal display device, illumination system and illumination method therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a three-dimensional liquid crystal display device, and more particularly, to an external lighting device used therein.

[0002]

2. Description of the Related Art A three-dimensional liquid crystal display device of this kind is disclosed, for example, in Japanese Patent Application Laid-Open No. 8-280044 (hereinafter referred to as Prior Art 1). This prior art 1
Provides a practical “stereoscopic display device” that can safely, easily and surely display a three-dimensional image. That is, in the prior art 1, a transparent and block-shaped three-dimensional display main body is built in a television monitor type cabinet of a three-dimensional display device. This three-dimensional display main body converts each cross-sectional image obtained by sequentially cutting an object to be displayed in a three-dimensional image from an end into a two-dimensional image 2.
It is constituted by vertically stacking a plurality of polymer nematic liquid crystal plates as polymer dispersed liquid crystal plates indicated by D and laminating them. The surface of each liquid crystal plate usually becomes a cloudy cloudy glass by scattering light on its surface, and when an AC voltage is applied to electrodes arranged in a dot matrix form in each liquid crystal plate, the transparency becomes a transparent glass state. . Thus, a two-dimensional image 2D is displayed on each liquid crystal plate, and a three-dimensional image is displayed on a three-dimensional display.

[0003] As is well known, the liquid crystal itself does not emit light, so that it is necessary to illuminate it from outside. This illumination is called "backlight" in a two-dimensional liquid crystal display, as is well known.

In the three-dimensional liquid crystal display device disclosed in the prior art 1, a fluorescent lamp 1 is used as an illumination system for an object displayed on the three-dimensional display body.
A very simple method of illuminating the book is adopted.

Referring to FIG. 2, a conventional three-dimensional liquid crystal display device having a conventional illumination system will be described. 2A is a front view, and FIG. 2B is a perspective view. In the illustrated example, a sphere is displayed as a three-dimensional image.

The three-dimensional liquid crystal display device has a rectangular parallelepiped three-dimensional liquid crystal display main body 10 and an illumination system 20 'for illuminating the three-dimensional liquid crystal display main body 10 from outside. This lighting system 2
Reference numeral 0 'denotes a single fluorescent lamp 21' disposed above the three-dimensional liquid crystal display main body 10, and a reflector 22 'for reflecting light from the fluorescent lamp 21'.

[0007] Light from the fluorescent lamp 21 'is reflected by a reflector 22', and radiated in parallel to the surface of a liquid crystal plate (not shown) constituting the three-dimensional liquid crystal display body 10.

This conventional illumination method compensates for the disadvantage that the displayed object is dark and invisible because the displayed object is displayed by liquid crystal. Therefore, although a three-dimensional effect can be obtained, no measure is taken at all in terms of expressing how light hits the object in the virtual space. Therefore, it can never be said that it is a realistic image expression.

[0009] Other prior art related to the present invention is also known. For example, Japanese Unexamined Patent Publication No. 63-65795 (hereinafter referred to as Prior Art 2) discloses a "three-dimensional image television" using a plate-like display panel capable of displaying an imaged object as a three-dimensional image. It has been disclosed. In Prior Art 2, a plurality of plate-shaped display panels are vertically stacked along the depth direction.

[0010]

The illumination system in the above-mentioned conventional three-dimensional liquid crystal display device has the following disadvantages. In other words, the illumination system satisfies only the necessary minimum functions such that the displayed image only needs to be seen, and the reality is impaired as a three-dimensional image. The reason for this is that liquid crystal plates are stacked to express a three-dimensional image, and the important element in image technology such as how light is applied has been neglected.

Prior Art 2 does not disclose any illumination system.

Accordingly, it is an object of the present invention to provide an unprecedentedly high level of virtualization for viewers viewing displayed 3D images by making significant improvements to external lighting devices in 3D liquid crystal display devices. It's about experiencing reality.

[0013]

According to the present invention, there is provided a three-dimensional liquid crystal display device having a rectangular parallelepiped three-dimensional liquid crystal display main body and an illumination system for externally illuminating the three-dimensional liquid crystal display main body. ,
The lighting system is characterized in that, when the viewing direction of the three-dimensional liquid crystal display body is set to the front, at least two light-emitting boards are installed on the three-dimensional liquid crystal display body except the front. A three-dimensional liquid crystal display device is obtained.

An upper surface other than the front surface,
It is preferable to install on a total of five surfaces: a lower surface, a right side surface, a left side surface, and a back surface. Further, it is desirable that the luminous body board be laid with luminous bodies of the number of resolutions (liquid crystal dots) of each plane. This makes it possible to change the intensity of light emitted from each light emitter for each dot.
In this manner, how the virtual light source hits the virtual object is expressed.

[0015]

The number of external illuminating devices of the three-dimensional liquid crystal display device is significantly increased, and the installation position is also increased, and each of them can be varied in an analog manner, not in two stages of ON and OFF.
Thus, the signal of the position direction and the intensity of the light source is also received from the device that outputs the video signal, and the way of the light is expressed.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, a three-dimensional liquid crystal display device having an illumination system according to an embodiment of the present invention will be described. In FIG. 1, (A) is a front view,
(B) is a see-through perspective view, and (C) is a partially enlarged view of a light emitting body board. In the example shown, a sphere is displayed as a three-dimensional image,
This is an example of lighting up from the back right.

The illustrated three-dimensional liquid crystal display device includes a three-dimensional liquid crystal display body 10 having a rectangular parallelepiped shape, and a three-dimensional liquid crystal display body 10.
The illumination system 20 according to the present invention, which illuminates the three-dimensional liquid crystal display main body 10 from the outside, is provided. The three-dimensional liquid crystal display main body 10 is formed by stacking liquid crystal plates (not shown), and the specific configuration thereof is the same as that disclosed in the above-described prior art, and thus the detailed description thereof is omitted here.

The illumination system 20 includes illuminant boards 21 installed on at least two surfaces except the front of the three-dimensional liquid crystal display main body 10 when the direction of viewing the three-dimensional liquid crystal display main body 10 is set to the front.

In the illustrated lighting system 20, the luminous body boards 21 are installed on five surfaces other than the front direction, that is, on the upper surface, the lower surface, the right side surface, the left side surface, and the back surface. On each illuminant board 21, illuminants 22 of the same number as the resolution of each surface are spread inward. here,
The “resolution” corresponds to the number of dots (pixels) of the liquid crystal constituting the three-dimensional liquid crystal display main body 10.
The intensity of light applied to each light emitter is made variable. Thereby, the luminous body 22 corresponding to the dot for which a bright point is desired to be expressed
Can adjust the light amount of itself and send light according to the request from the dot.

Thus, the illustrated lighting system 20 comprises:
Since an enormous number of light sources (light emitters) 22 (5 directions × plane resolution) are used and the light intensity of each light source 22 is also variable, light other than illumination from above can be expressed.
In addition, as the light emitting body 22, for example, a light emitting diode can be used.

Therefore, the intensity of light can be freely adjusted in part inside the three-dimensional liquid crystal display main body 10, so that the light is intensely applied to a dark portion and the light intensity is weakly applied to a light portion, thereby improving contrast. You can also adjust. As a result, it is possible to reproduce a three-dimensional object that is more incomparable to the previous one in the expression of the phases of the moon.

The timing for changing the light intensity of the individual light emitters 22 on the light emitter board 21 depends on the vertical synchronization interrupt of the three-dimensional liquid crystal display device. Also, luminous body 2
The light intensity of 2 can be adjusted in multiple steps in an analog manner, and at least 2
There are 56 stages.

As described above, the present invention, which follows the general-purpose three-dimensional liquid crystal display system, can provide a more realistic and expressive image in most cases using the three-dimensional liquid crystal display device. .

The present invention is not limited to the above embodiment,
Various changes and modifications are possible without departing from the spirit of the present invention. For example, in the above embodiment, the illuminant boards are installed on five surfaces except the front surface, but the illuminant boards may be installed on two surfaces except the front surface. For example, the luminous body board is divided into a total of four surfaces of an upper surface, a lower surface, a right surface, and a left surface, a total of four surfaces of an upper surface, a right surface, a left surface, and a rear surface, a total of three surfaces of a top surface, a right surface, and a left surface, A total of two surfaces, upper and lower,
It may be installed on a total of two surfaces on the right side and the left side, a total of two surfaces on the upper surface and the back surface, or other combinations may be used. Further, the light-emitting body board is not limited to the one described in the above embodiment, but may be anything as long as light can be individually transmitted to each dot.

[0026]

As described above, since the present invention can express not only the three-dimensional shape but also the way of hitting light, the viewer who sees a reality that is incomparable compared to the case of only the shape Can be given to. The reason is that the brightness of each of the light-emitting elements mounted on the light-emitting element board is made variable, so that it is possible to express how light from the virtual light source hits the virtual object.

[Brief description of the drawings]

FIG. 1 is a view showing a three-dimensional liquid crystal display device provided with an illumination system according to an embodiment of the present invention, wherein (A) is a front view, (B) is a perspective view, and (C) is a light emitting board. FIG.

FIGS. 2A and 2B are diagrams showing a three-dimensional liquid crystal display device provided with a conventional illumination system, wherein FIG. 2A is a front view and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Three-dimensional liquid crystal display main body 20 Lighting system 21 Light emitting body board 22 Light emitting body

Claims (15)

(57) [Claims] 1. A three-dimensional liquid crystal display device comprising: a rectangular parallelepiped three-dimensional liquid crystal display main body; and an illumination system for externally illuminating the three-dimensional liquid crystal display main body. A three-dimensional liquid crystal display device, characterized in that the light-emitting boards are installed on at least two surfaces of the three-dimensional liquid crystal display main body except for the front, when the display main body is viewed from the front. 2. The three-dimensional liquid crystal display device according to claim 1, wherein the illuminant boards are provided on a total of five surfaces other than the front surface, namely, an upper surface, a lower surface, a right side surface, a left side surface, and a back surface. 3. The light-emitting body board is provided on a total of four surfaces: an upper surface, a lower surface, a right side surface, and a left side surface.
3. A three-dimensional liquid crystal display device according to item 1. 4. The three-dimensional liquid crystal display device according to claim 1, wherein the illuminant boards are provided on a total of four surfaces: a top surface, a right side surface, a left side surface, and a back surface. 5. The three-dimensional liquid crystal display device according to claim 1, wherein the illuminant boards are installed on a total of three surfaces, namely, an upper surface, a right side surface, and a left side surface. 6. The three-dimensional liquid crystal display device according to claim 1, wherein the illuminant boards are installed on a total of two surfaces, an upper surface and a lower surface. 7. The three-dimensional liquid crystal display device according to claim 1, wherein the luminous body boards are provided on a total of two surfaces, a right side surface and a left side surface. 8. The three-dimensional liquid crystal display device according to claim 1, wherein the illuminant boards are provided on a total of two surfaces, an upper surface and a rear surface. 9. The three-dimensional liquid crystal display device according to claim 1, wherein each of the light emitter boards has a plurality of light emitters spread on an inner surface facing the three-dimensional liquid crystal display main body. 10. The light emitter is a light emitting diode.
The three-dimensional liquid crystal display device according to claim 9. 11. The plurality of illuminants spread on each of the illuminant boards are arranged in one-to-one correspondence with the liquid crystal dots on the surface of the opposing three-dimensional liquid crystal display main body. 10. The three-dimensional liquid crystal display device according to 9. 12. An illumination system for externally illuminating a three-dimensional liquid crystal display body having a rectangular parallelepiped shape, wherein when the three-dimensional liquid crystal display body is viewed from the front, An illumination system for a three-dimensional liquid crystal display, wherein the illumination system is a luminous board installed on at least two surfaces except the front surface. 13. The illumination system for a three-dimensional liquid crystal display according to claim 12, wherein each of the issuer boards has a plurality of light emitters spread on an inner surface facing the three-dimensional liquid crystal display body. 14. The light emitting device is a light emitting diode.
The lighting system for a three-dimensional liquid crystal display according to claim 13. 15. An illumination method for a three-dimensional liquid crystal display, wherein the illumination from the outside in the three-dimensional liquid crystal display device is finely controlled to increase the reality.