JPS62191817A - Method and device for projecting image - Google Patents

Abstract

PURPOSE:To project a delicate and bright image having a high resolution by utilizing a residual image effect, by swinging an optical axis of a light beam passing through a liquid crystal panel, within a residual image forming time range of a vision against a screen. CONSTITUTION:Between a liquid crystal panel 5 and a screen 3, a lens 8' is attached eccentrically to a projecting rotary plate 7' rotating centering around an optical axis 9', and an optical axis displacement mechanism is constituted. At the time of making a light beam from a light source 2 pass through an image which has been formed on the liquid crystal panel 5 by an electronic device 4 by an electronic camera, etc., and projecting it to the screen, the optical axis is swung within a residual image forming time range of a vision by said optical axis displacement mechanism, and the image is varied periodically and projected. As a result, during the first coarse projected image, the next image is projected and joined, therefore,a delicate and bight image having a high resolution can be projected by utilizing a residual image effect.

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology transmits light from a light source to an image, such as a color image, formed by an electronic device on a liquid crystal panel such as a liquid crystal television, and displays the image on a screen. It belongs to the field of image projection technology that forms enlarged images.

Summary of the gist> The invention of this application transmits light from a white light source to a color image of a moving image formed on a liquid crystal panel of a color liquid crystal television or the like to display an enlarged color image on a screen. This invention relates to a method of projecting images such as images, and a device directly used in the method.In particular, this invention relates to a method of projecting images such as images, and a device directly used in the method. A displacement mechanism is provided to capture the optical axis at a predetermined period over time, and the position of the enlarged image on the screen of many pixels formed on the liquid crystal panel is changed to create multiple images on the screen within the visual afterimage range. The present invention relates to an image projection method for forming a detailed enlarged image with high resolution, and a device directly used in the method.

<Prior Art> As is well known, television has become not only a means of entertainment, but also an extremely important means of information transmission for education and industrial activities, and it has become possible to provide the same information to many viewers from a small number of viewers. As a result, there has been a wide demand for means for enlarging and projecting images formed on televisions onto large screens installed in conference rooms, ships, aircraft, school classrooms, and the like.

The so-called video projector system was used to enlarge and project images on the screen of cathode ray tube televisions, which had been the mainstream of televisions until now, but as is well known, the problem was that the brightness was not sufficient.
Combining three red, green, and blue projectors makes the equipment larger, more complicated, and has the disadvantages of higher costs, as well as the problem of having to look at the top of the furnace for maintenance, maintenance, and management. Ta.

On the other hand, images formed on liquid crystal panels such as so-called liquid crystal televisions, which have been rapidly developed, use electronic shutter technology to transmit white light from a light source or color light to a screen through a lens. Techniques for projecting enlarged images onto images have been developed, and the applicant has also devised and proposed many techniques of this kind.

<Problems to be Solved by the Invention> However, since the image on the seed liquid crystal panel is formed by a large number of pixels, if the image formed on the liquid crystal panel is enlarged and projected onto a screen using transmitted light, the basic problem will be Since the pixels of the liquid crystal panel are enlarged and projected onto the screen,
The drawback was that the screen was grainy and the resolution was low.

To deal with this, there are various techniques such as superimposing the pixel-formed images of the liquid crystal panel pixel by pixel on the screen and overlapping each image on the screen, as shown in many of the applicant's earlier patent inventions. technology has been developed.

Although each of the many means of projecting an enlarged image on a screen devised earlier has its merits and demerits, essentially the image formed on the liquid crystal panel and the image enlarged and projected onto the screen are time shearing. There is a one-to-one correspondence, and it is merely a means of increasing the sharpness of the image, and tends not to essentially increase the density of the image on the screen.

The purpose of the invention of this application is to solve the problem of enlarged projection of a television image on a screen based on the above-mentioned prior art, and to provide an enlarged projection of an image formed on a liquid crystal panel on a screen by light transmission. While assuming the various advantages of An excellent image projection method that increases the resolution of an enlarged image on a screen and forms a fine-grained and bright image, thereby benefiting the field of image transmission technology in the information industry, and images directly used therefor. The purpose is to provide a projection device.

<Means/effects for solving the problems> In order to solve the above-mentioned problems, the structure of the invention of this application, which is based on the above-mentioned claims, is to solve the above-mentioned problems. Light from a light source is transmitted through the panel through an image formed on the liquid crystal panel via an electronic device such as an image retrieval element such as an electronic camera or a videotape, and an enlarged image is projected onto a screen via a lens or prism. On this occasion,
The optical axis is periodically moved one step relative to the screen through a mechanical or electronic optical axis displacement mechanism interposed between the liquid crystal panel and the screen, and each pixel of the liquid crystal panel is moved accordingly. The image information formed on the screen is periodically changed in a multifaceted manner, and the periodic positional changes of each pixel on the screen and the information changes are projected in a multifaceted and interconnected manner within the visual afterimage range, As a result, the resolution of the enlarged image is improved by periodically changing the position of the pixel images synchronously formed on the liquid crystal panel by the Oka image element, etc., and by projecting multiple images due to information changes on the screen. It takes technical measures to ensure that a finely detailed image is formed on the screen.

<Example> Next, an example of the invention of this application will be described below based on the drawings.

The embodiment shown in FIG. 2 is a fundamental aspect of the invention of this application, and a well-known electronic image forming device 4 is electrically connected between the white light @ 2 and the screen 3 from the light source 2 to the screen 3 side. A liquid crystal panel 5 is provided to transmit light from a light source 2 to a pixel (not shown), transmit it through a lens 6, and magnify it, and a fixed reflection mirror 7 and a movable mirror 8 as a mechanism for shifting the optical axis over time. Since the movable mirror 8 is formed with an optical axis displacement mechanism, the movable mirror 8 is moved at a set angle over time by an electric camera (not shown). Therefore, as shown in the figure,
The optical axis 9 is arranged so as to be curved on the screen 3 at a predetermined angle setting cycle.

Since the optical axis deflection changes over time at a speed within the visual afterimage formation range, for example, as shown in FIG. 3, these three pixels form the image 10 at a certain initial time, as shown in FIG.
Image 10' is formed within the next afterimage formation time (images 10 and 1
0' is an assembled complementary part of the same image), and if the reflecting mirror 8 takes a picture of its front axis for the width of the temporally changing image during the image change, then As shown in Figure 3, the image 10.10.10 j\i! is initially within the visual afterimage formation range! An image with coarse pixels is formed on the screen 3, and within the next afterimage formation time, an image 10.1 is projected with the coarse resolution.
0.10, i.e. the resolution is coarsened, resulting in
Images 10', 10', formed in the non-projected portion of the image by the following electronically controlled pixel operations:
10' is formed, visually the image 10110', 1
Continuous images 11 of 0.10' and 10110' are formed, and images of sufficient resolution are formed adjacent to each other.

Therefore, for the viewer, the image on the screen @10
．． 10', 10.10'... connected images 11
In this principle, an image made up of a fixed number of pixels on one liquid crystal panel is actually a high-resolution image that is a combination of images made up of twice as many pixels.

The high-resolution spliced image 11 in FIG. 3 is created by the vertical deflection of the optical axis of the anti-fouling mirror 8, but as shown in FIG. In this case, a coarse-resolution image of the initial images 12.12... is formed on the screen 3 as described above, but due to the reflection mirror 8 being captured within the next afterimage formation time, the initial images 12.12... Image 12 with the next pixel control during...
', 12'... are formed (images 12, 12' are complementary parts of the same image), and as a result, within the afterimage formation time range, the viewer sees 13 images that are joined together and double the resolution. This means that images with high quality can be viewed.

In this embodiment as well, the resolution of an enlarged image on the screen by the pixels of a stationary liquid crystal panel is doubled, making it possible to view an extremely fine-grained image.

However, the above two modes are due to the uniaxial rotation of the reflecting mirror 8, but by rotating the reflecting mirror 8 three-dimensionally on two axes by appropriate means, the optical axis 9 forms an arc on the screen. Therefore, as shown in FIG. 5, the resolution on the screen will be expanded in two dimensions, and the initial image 14 formed by each pixel of the liquid crystal panel 5 will move to the right, and the next image will move to the right. A 14' image is formed on the screen 3 within the afterimage formation time range of , and then a 14'' image is formed within the next remaining formation time range by moving to E, and then a 14'' image is formed on the screen 3 by moving to E. 1 to move
4'' images, allowing the viewer to view 15 images with four times the resolution spliced together on the screen.

In a state where each pixel of the liquid crystal panel 5 changes within 1/16 seconds, that is, within the visual afterimage formation time, the reflection mirror 8 further changes the optical axis over time by 1/4 of that time. As long as this is done, fine connected images with four times the resolution as shown in FIG. 5 are formed within 1/16 seconds, allowing the viewer to see a high resolution image.

The image formed by the electronically controlled pixels formed on the liquid crystal panel does not cause any problems even if the image information is transferred as needed, whether it is an image based on real-time imitation or a recorded image on videotape, as the pixels of the screen move. It's something that doesn't exist.

In this way, it is possible to form an enlarged image as a high-resolution, fine-grained image on one screen using a single liquid crystal panel. or projected in high resolution.

Next, Figure 1 shows the actual real-time real image W.
An example of projecting a high-resolution, real-time enlarged image onto an enlarged screen using one shadow will be described below.
Reference numeral 1' denotes an image projection device according to the invention of this application, in which a liquid crystal panel 5 is connected from a light source 2 to a screen 3 on the projection side.
is electrically connected to the electronic image forming device 4, and a tilting mechanism is provided on the projection rotary plate 7' centered on the light source 2 with respect to the screen 3 and the optical axis 9' with respect to the liquid crystal panel 5. The lens 8' is set eccentrically, so that the optical axis 9 of the light that has passed through the lens 8' is rotated to the screen by rotating the projection rotating plate 7' at a high speed at a set angular velocity within the visual afterimage formation range. Therefore, as shown in FIG. The image 11 corresponding to the pixel 12 is rotated and formed at a position that changes over time,
As shown in FIG. 5, an enlarged image 11' is formed in which each rotation is divided into four parts, which are closely connected to each other. Therefore, each pixel of the liquid crystal panel 5 displays an image of each rotation of 1/16 seconds. 12, the image 11' on the screen 3
This means that a detailed image with a resolution four times that of an image enlarged and projected using a stationary lens can be obtained.

Therefore, a 6-pixel solid-state dynamic image element camera 10 is electrically connected to the image electronic image creation device 4 of the pixels 12, and a lens 8'' of the same tilting mechanism is attached to the rotary plate 7'' for copying the real image 11. By rotating at high speed in synchronization with the projection rotary plate 7' for projection, images in the visual afterimage formation range are continuously displayed on each pixel 12 of the liquid crystal panel 5 on the projection side via the image carrier element 10. Therefore, the rotation of the projection rotary plate 7' causes the real image 1 to be
1 real-time, high-resolution, detailed image 11'
will be formed on the screen 3.

The embodiments of the invention of this application are, of course, not limited to the above-described embodiments. For example, in an electronic image creation device, as long as the liquid crystal filter of each pixel of the liquid crystal panel can be operated at high speed, light In addition to controlling the axis displacement mechanism by dividing it in the circumferential direction, it is possible to achieve high resolution by dividing the axis displacement mechanism into 5 or more divisions, and thereby avoid using an optical axis displacement mechanism over time on the image carrier camera side. In addition, as a mechanism for displacing the optical axis over time, displacement of a prism can be used instead of mechanical photographing of a reflecting mirror or eccentric rotation of a lens in a tilting mechanism, or an electrostrictive mechanism can be used to change light transmission. Various embodiments can be adopted in which all available optical axis displacement mechanisms at the time of completion of the invention of this application can be used, such as displacing the optical axis by changing the refractive index at high speed.

Moreover, it goes without saying that the present invention can be applied to liquid crystal panels such as monochrome liquid crystal televisions in addition to color liquid crystal televisions.

As a method for moving the optical axis, the liquid crystal panel itself can be photographed.Furthermore, transparent ceramic polycrystalline panels such as PLZT, which have recently been developed in place of liquid crystal panels, can change the image information over time. It is also possible to use transparent panels.

<Effects of the Invention> As described above, according to the invention of this application, basically, an enlarged image is displayed on a screen by transmitting light to an image formed by an image on a liquid crystal panel such as a color liquid crystal television that can transmit light. In the technology for projecting images, the optical axis of the light passing through the liquid crystal panel is made to swing relative to the screen within the visual afterimage formation time range. Although the projection of the magnified image on the image screen is coarse-grained and low-resolution, the optical axis relative to the screen is placed in this rough-resolution gap, so that the next image is projected onto the coarse-grained edge. By projecting onto the unprojected part of the image and joining the rear image to the front image, a series of fine-grained, high-resolution images are formed on the screen, and the visual afterimage effect creates a single image. The excellent effect of being able to visually recognize a detailed and bright image is produced.

Even though there is only one liquid crystal panel, each pixel of that one liquid crystal panel is enlarged in the same manner as images from the pixels of multiple liquid crystal panels are projected onto the screen through optical axis changes. The excellent effect that projection can take place is produced.

Since there is only one liquid crystal panel, its basic structure is simple, and the optical axis displacement mechanism is an integrated mechanical,
It has the excellent effect of projecting a fine, high-resolution image onto a screen and enlarging the image by 1q just by applying electrical and electronic control methods.
.

[Brief explanation of drawings]

The drawings are detailed explanatory views of the invention of this application, in which Fig. 1 is a schematic perspective view of one embodiment, Fig. 2 is a schematic side view of the principle mode, and Fig. 3 is a basic high-resolution image formation schematic. Figure 4 is a schematic diagram of the state of the site, and Figure 5 is a schematic diagram of the state of excavation.

Claims (2)

[Claims] (1) In a method of enlarging and projecting an image formed on a liquid crystal panel onto a screen by transmitting light, the liquid crystal is projected onto the screen by periodically swinging the optical axis from the liquid crystal panel to the screen. An image projection method characterized in that a plurality of images from each pixel of a panel are formed by periodically changing their positions. (2) In an image projection device in which a liquid crystal panel is interposed between a light source and a screen with a lens on the screen side, a periodic optical axis displacement mechanism is provided between the liquid crystal panel and the screen. An image projection device characterized by: