JP2540999B2 - Image display method - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a method of displaying light emitted from a light source through a liquid crystal display device to display an image pattern (still image or moving image) formed by driving an image section of the liquid crystal display device.

[Prior art]

Conventionally, as one of the methods for displaying an image such as a still image or a moving image, there is a configuration in which a liquid crystal display device is used and black-and-white display or color display is performed by light passing through the liquid crystal display device from a light source. . And
As shown in FIG. 11, on the display surface of the liquid crystal display device 1 used in this display format, a plurality of image portions (portions where transparent electrodes face each other and are made transparent or non-transparent by driving liquid crystal) are predetermined. Are separated by a non-image portion 3 formed of a black mask that prevents light transmission through a current path or a driving element, and an image pattern is formed by each operation (transmission or non-transmission) of the image portion 2. It was something.

[Problems to be Solved by the Invention]

By the way, as described above, since the non-image portion in the liquid crystal display device is black, the non-image portion provided vertically and horizontally becomes noticeable when the display surface is approached, which makes the image difficult to see. In the current situation, the display surface is viewed with a certain distance. Further, in the projection type video equipment by the display method using this liquid crystal display device, since the screen formed on the screen surface becomes large, the non-image part pattern on the screen surface corresponding to the non-image part, That is, the pattern in which the light from the light source is blocked also becomes a large grid pattern, and there is a problem that the image becomes extremely difficult to see. Therefore, it is an object of the present invention to eliminate the appearance of non-image part patterns when a small-sized video device or a projection-type video device is used, and an object of the present invention is to make the image of the small-sized video device or the projection-type video device easy to see. Is.

[Means for Solving the Problems]

The present invention has been made in view of the above problems, and irradiates light from a light source to a liquid crystal display device having a plurality of image portions vertically and horizontally partitioned by a non-image portion that blocks light, thereby providing the liquid crystal display. When displaying an image formed by the device on the screen surface, a plurality of lens cuts extending at least in the up-and-down direction of the two directions of the non-image part are arranged in parallel in the left-right direction corresponding to the image part. A lens plate that diffuses the light that passes through the lens cut,
Placed between the liquid crystal display device and the screen surface,
Further, a front lens plate is provided on the surface of the above-mentioned three-sided surface, the front lens plate being arranged in parallel in the left-right direction in such a manner that the lens cuts extending in the vertical direction correspond to the two pitches in the vertical direction at one pitch. Each of the plurality of image parts corresponding to each of the lens cuts of the front lens plate is made to irradiate each of the lights passing through the image part from the light source, through the lens cuts of the lens plate, to the screen plate in the pitch order of the lens cuts. The present invention provides an image display method characterized in that the plurality of right half image portions and the plurality of left half image portions are driven by an image configuration pattern that causes parallax, and solves the above problems. .

[Work]

In the present invention, first, the light emitted from the light source passes through each of the image portions in the transmissive state, and the irradiation light of the image pattern reaches the lens plate in the state having the non-image portion pattern. Irradiation light that has passed through the image portion is incident on each lens cut of the lens plate, and each irradiation light is diffused by passing through this lens cut. The diffused irradiation light is applied to the screen surface with the pitch width of the lens cut,
The non-image part pattern does not appear on the screen surface, and the image is composed only of the image of the irradiation light from the image part. For example, as shown in FIG. 1, when the parallel irradiation light s from the light source reaches the liquid crystal display device 1 in which the non-image part 3 partitions the predetermined pitch image part 2 vertically and horizontally, the liquid crystal display device 1 is in a light transmitting state. Only the image portion 2 is passed. The pattern of the passing irradiation light s is an image pattern formed on the display surface by driving each of the image parts 2, and it is assumed that the image parts 2a, 2b, 2c, 2d, 2e, 2f are in a transmissive state. , The irradiation light a, b, c, d, e, f passes in the same pattern (see FIG. 3). Then, each of the irradiation lights incident on the lens plate 4 is diffused, and when the diffused irradiation lights A, B, C, D, E, F are diffused by the pitch width of the lens cut in the lens plate 4, the irradiation is performed on the screen surface. Then, each of the irradiation lights A, B, C, D, E, and F forms a pixel image in a densely arranged state (see FIG. 7). Furthermore, on the surface of the screen, a front lens plate corresponding to a 1-pitch lens cut is arranged in the image section of two vertical columns, and for each image section of the two vertical columns, the image arranged in the left half column and the left half are arranged. The image on the screen is stereoscopically viewed by driving through the image forming pattern on the screen through the front lens plate by driving the image forming pattern that causes parallax between the image parts in the aligned columns.

【Example】

Next, the present invention will be described in detail based on the embodiments shown in FIGS. 1 to 10. The parts having the same configurations as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted. First, the process of forming an image on the screen surface in the present invention will be described with reference to FIGS. 1 to 8. 4 in the figure
Is a lens plate, and the lens plate 4 is a liquid crystal display device 1
Is located in the light irradiation path between the screen surface (transmissive screen) 5 and is integrally disposed on the irradiation light incident side of the screen surface 5. As shown in FIG. 2, this lens plate 4 is referred to as a lenticular lens in which a plurality of lens cuts 4y extending in the vertical direction (the arrow X direction in the drawing) are arranged in the horizontal direction (the Y direction in the drawing). The lens cuts 4y of the lens plate 4 correspond to the vertical center lines of the image section 2 partitioned by the non-image section 3 of the liquid crystal display device 1 in the vertical and horizontal directions (XY directions). The lens cut shape and the thickness of the lens plate 4 are such that the irradiation light emitted as parallel light through the image part 2 enters the lens cut 4y, is once condensed and then diffused, and the diffused light is reflected on the screen surface 5. The irradiation is set so as to be spread in the pitch width Py of the lens cut 4y, that is, in the state of being closely arranged. For example, when the image portions 2a, 2b, 2c, 2d, 2e, 2f are in the transmissive state on the display surface of the liquid crystal display device 1 which receives parallel irradiation light from the light source side, as shown in FIG. Irradiation lights a, b, c, d, e and f come to pass in the same pattern. The patterns of the portions other than the irradiation light a, b, c, d, e, f become the pattern of the non-image portion and the pattern of the image portion in the shielded state. Each of the above irradiation lights is similarly condensed and diffused, but if explained based on the irradiation lights a and d viewed from above, once the irradiation lights a and d enter the lens cuts 4y, they are once condensed. Irradiation lights A and D that have been diffused and have a diffusion width of the pitch width Py as described above are applied to the screen surface 5, and thus the non-image portion in the X direction in the enclosed range from the irradiation lights a to f. With the pattern removed, the screen surface 5 is irradiated with irradiation lights A to F, and each becomes a pixel on the screen surface to form an image. In this case, the non-image portion pattern in the Y direction is developed, but the quality of the image is not so deteriorated even if the non-image portion pattern in the lateral direction is developed. Of course, it does not appear when there is no non-image in the Y direction on the liquid crystal display device side. 5 to 7 show an example in which two lens plates 4 and 6 are arranged in front of the screen surface 5 in the light incident direction. Like the lens plate 4, the lens cut 4y extending in the X direction is arranged in parallel in the Y direction, and the lens plate 6 is called a lenticular lens like the lens plate 4,
A plurality of lens cuts 6x extending in the Y direction are arranged side by side in the X direction. The lens cuts 6x of the lens plate 6 correspond to the row center lines of the image portion 2. That is, the lens cuts 4y and 6x are orthogonal to each other,
Each of the lens parts formed by this orthogonality is an image part 2
There is a one-to-one correspondence with. When the irradiation light is emitted from the liquid crystal display device 1 as parallel light, the respective irradiation lights come into the corresponding lens portions. Illustrated by irradiation lights a and d viewed from above, the irradiation lights a and d are first incident on each of the lens cuts 4y to be condensed / diffused in the Y direction, and then incident on the lens cuts 6x to generate X. Collects and diffuses in the direction. Irradiation light A, D whose diffusion width in the Y direction of each of the irradiation light a and d becomes the pitch width Py, and whose diffusion width in the X direction becomes the pitch width Px of the lens cut 6x is irradiated to the screen surface 5, and thus the irradiation is performed. With the non-image part pattern in the XY direction in the enclosed range from the light a to f, that is, all the non-image part patterns are removed, as shown in FIG. To F are emitted, and each becomes a pixel densely arranged on the screen surface to form an image. FIG. 8 shows an example in which the liquid crystal video projector 9 that projects the image of the liquid crystal display device 1 from the light source 7 by the projection lens 8 is used to project the image on the screen surface 5 side. A Fresnel lens 10 whose focal length is the distance to the projection lens 8 is arranged in front of the lens plate 4 in order to irradiate the screen surface 5 side with the irradiation light diffused from the projection lens 8 as parallel light. Further, the lens cuts 4y of the lens plate 4 correspond to the vertical alignment center lines of the image part through the projection lens 8, and the image pattern formed by the liquid crystal display device 1 is projected. It is formed on the screen surface 5 through the lens 8, the Fresnel lens 10, and the lens plate 4, and the enlarged pixels are densely arranged in the Y direction. In this configuration, the example in which only the lens plate 4 is used is shown, but as described above, the lens plates 4 and 6 are used.
Alternatively, a lens plate (referred to as a fly-eye lens) in which the lens cuts 4y and 6x are integrally formed may be used. In the above configuration, the pitch of the image area is 162μ.
m, the image portion width is 110 μm, and the pixel width on the screen surface is 2 mm, the lens plate 4 has a lens cut curvature of 1.5 mm, a cut pitch of 2.0 mm, and a thickness of 10.4 mm.
The material of the lens plate is an acrylic plate, and n = 1.49. FIG. 9 shows an embodiment of the present invention. In this embodiment, a stereoscopic image display is performed with a configuration using a liquid crystal video projector. In this embodiment, as shown in FIG. 9, the front lens plate 11 is formed on the surface of the screen surface 5.
The front lens plate 11 has a plurality of lens cuts 11y extending in the Y direction side by side in the Y direction, and one pitch of lens cuts 11y corresponds to two pitches of lens cuts 4y of the lens plate 4. ing. That is, they are provided so as to correspond to the image sections in two columns. Further, on the liquid crystal display device 1 side, the image parts of the two vertical columns corresponding to the lens cut 11y of the front lens 11 are divided into the image part arranged in the right half and the left half for each image part of the two vertical examples. It is driven by an image configuration pattern in which parallax occurs between the image parts in the aligned columns. Therefore, the image formed on the screen surface 5 from the liquid crystal display device 1 through the projection lens 8 and the Fresnel lens 10 is
For each part corresponding to the lens cut 11y, a parallax occurs between the right half image and the left half image, and by viewing this through the lens plate 11, the image is stereoscopically viewed on the screen surface. The stereoscopic viewing can be performed even in a configuration without using the liquid crystal video projector. For example, as shown in FIG. 10, as described above, the liquid crystal display device 1 in which a parallax is generated between the right half column image part and the left half column image part for each two image columns arranged in parallel is The front lens plate 11 is arranged in front of the plate 4 and on the surface of the screen surface 5 in the same manner as described above. Then, the irradiation lights L and R which are parallel irradiation lights l and r (shown in a state viewed from above) are incident on the lens plate 4 and diffused from the liquid crystal display device 1.
By illuminating the screen surface 5 with an image, an image having a parallax is obtained for each lens cut 11y, and a stereoscopic view is obtained by viewing the image through the front lens plate 11.

【The invention's effect】

As described above, according to the present invention, a liquid crystal display device having a plurality of image portions vertically and horizontally partitioned by a non-image portion that blocks light is irradiated with light from a light source, In displaying the configured image on the screen surface, a plurality of lens cuts extending at least in the up-and-down direction of the two directions of the non-image part are arranged in parallel in the left-right direction corresponding to the image part, and the lens cut is performed. A lens plate for diffusing each transmitted light is arranged between the liquid crystal display device and the screen surface, and the lens cut in the vertical direction is one pitch, as opposed to the two pitches of the lens cut in the vertical direction. Correspondingly, front lens plates arranged in parallel in the left-right direction are arranged on the surface of the screen surface, and each light passing through the image part from the light source is reflected by the lens plate. Through the cut, the screen surface is irradiated with a lens cut pitch width, and for each of a plurality of image parts corresponding to each of the lens cuts of the front lens plate, the right half image part and the left half of the plurality of image parts Since the image part of, is driven by an image configuration pattern that causes parallax, it is possible to prevent the non-image part pattern on the screen surface from being conspicuous and not particularly expressed, and in particular,
Even when the image pattern is projected and enlarged, a stereoscopic image that is very easy to see can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the image formation of the present invention, FIG. 2 is an explanatory view showing a lens plate having a lens cut extending in the vertical direction, FIG. 3 is an explanatory view showing an image portion and an irradiation light pattern, and FIG. Is an explanatory view showing an image on a screen surface, FIG. 5 is an explanatory view showing image formation when two lens plates are used, FIG. 6 is an explanatory view showing two lens plates, and FIG. FIG. 8 is an explanatory view showing an image on a screen surface when using one lens plate, FIG. 8 is an explanatory view showing image formation using a Fresnel lens, and FIG. 9 is an explanation showing one embodiment according to the present invention. FIG. 10 is an explanatory view showing another embodiment, and FIG. 11 is an explanatory view showing a conventional example. 1 ... Liquid crystal display device 2 ... Image part 2a, 2b, 2c, 2d, 2e, 2f ... Image part 3 ... Non-image part 4 ... Lens plate, 4y ... Lens cut 5 ... Screen surface 6 ... … Lens plate, 6x …… Lens cut 7 …… Light source 8 …… Projection lens 10 …… Fresnel lens 11 …… Front lens plate, 11y …… Lens cut

Continuation of the front page (56) References JP-A-60-262131 (JP, A) JP-A-56-70585 (JP, A) Practical application Sho-64-3885 (JP, U)

Claims (1)

(57) [Claims] 1. A liquid crystal display device having a plurality of image parts vertically and horizontally partitioned by a non-image part that blocks light is irradiated with light from a light source to display an image formed by the liquid crystal display device on a screen surface. In displaying, a plurality of lens cuts extending in at least the vertical direction of the two directions of the non-image portion are arranged in parallel in the left-right direction corresponding to the image portion, and light transmitted through the lens cuts is diffused respectively. The lens plate is arranged between the liquid crystal display device and the screen surface, and the lens cuts extending in the vertical direction are arranged in parallel in the left-right direction so as to correspond to the two pitches of the lens cutting extending in the vertical direction. The front lens plate is arranged on the surface of the screen surface, each of the light that has passed through the image portion from the light source, through the lens cut of the lens plate, the Was irradiated at a pitch width of the lens cut clean surface, for each of the plurality of image portions corresponding to the lens cutting each of said front lens plate, and the image of the right and left halves of the image portion of the image portion of the plurality of,
An image display method characterized by driving with an image configuration pattern that causes parallax.