KR20160047144A - Image projection system - Google Patents

Abstract

An image projection system is disclosed. The system includes: a curved glass; an image source device providing an image to a projector; a curved screen on which the image is displayed; and a projector arranged at an upper part or a lower part of the curved screen and projecting the image to the curved glass. The curved glass is disposed on an optical path of the image projected from the projector, reflects the image to the curved screen, and a curvature of the curved glass is equal to that of the curved screen. Thus, device efficiency and user convenience may be improved.

Description

IMAGE PROJECTION SYSTEM

The present invention relates to an image projection system, and more particularly, to an image projection system that projects an image on a curved screen using a projector.

2. Description of the Related Art Projectors for enlarging and projecting on-screen display contents of an information terminal such as a personal computer are widely spread. Projectors, for example, in conference rooms, theaters, religious facilities, etc., are often found.

However, when an image is reproduced using a projector, a certain distance between the projector and the screen, that is, a minimum projection distance is required. As described above, when the projector and the screen are separated by a certain distance, the viewer's image immersion degree may be lowered.

Accordingly, a curved screen has been employed to improve the viewer's image immersion degree. In order to narrow the projection distance between the projector and the screen, a flat mirror is used to reflect the image beam through the flat mirror to project the image on the screen .

In the prior art, an image projection system including a curved screen and a flat mirror was constructed to improve viewer immersion and to shorten the projection distance.

In this case, due to the shape of the curved screen, screen pin cushion distortion (distorted image with concave edge) and Barrel distortion (distorted image protruding from the center of the image) could occur. For this, measures such as software correction processing and manual correction processing were required.

In addition, when the projection distance is short, there is a problem that the shadow of the viewer is displayed on the curved screen because the viewer hides the image beam.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image projection system equipped with a curved screen and a curved mirror with curvature matching.

Another object of the present invention is to provide an image projection system that improves the immersion feeling of viewers.

Another object of the present invention is to provide an image projection system that does not cover an image by a viewer and provides a relatively short projection distance.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided an image projection system including a curved mirror, an image source device for providing an image to a projector, a curved screen on which the image is displayed, And a projector for projecting the image onto the curved mirror, wherein the curved mirror is disposed on an optical path of an image projected from the projector, and reflects the image to display on the curved screen, The curvature may coincide with the curvature of the curved screen.

Here, the curved mirror and the curved screen may be composed of spheres, cylinders, and ellipses.

In addition, the image projection system may further include a curved mirror, a curved screen, and a support for fixing the projector.

In addition, when the projector is tilted, the projector may adjust the keystone of the image to correct the distortion of the image, and may control the image so that the image reflected from the curved mirror does not meet a specific area of the viewer.

Further, the curved mirror and the curved screen are configured in a spherical shape and the horizontal center of the center point (Pp) of the projector, the center point (Mp) of the curved mirror, and the center point (Sp) of the curved screen can be arranged in a straight line .

The effect of the image projection system according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, there is provided an image projection system equipped with a curved screen and a curved mirror with curvature coinciding with each other, so that image distortion can be mitigated.

In addition, according to at least one of the embodiments of the present invention, the above-described image projection system is employed, which has the advantage that the image immersion feeling of the viewer can be improved.

In addition, according to at least one of the embodiments of the present invention, the above-described image projection system is adopted, so that the image is not covered by the viewer and a relatively short projection distance is provided, thereby improving the apparatus efficiency and economy.

Also, according to at least one embodiment of the present invention, an image projection system that minimizes image distortion using one curved screen and one curved mirror is provided, thereby improving user convenience and device efficiency.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1 is a view showing an example of an image projection system to which the present invention is applied.
2 is a block diagram of an image projection system according to an embodiment of the present invention.
3 to 5 are views showing the structure of the image projection system shown in FIG. 1 in detail.
FIG. 6 is a diagram showing an image projected in the image projection system shown in FIG. 1. FIG.
7 and 8 are views showing various embodiments in which the image projection system proposed in the present invention is applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

1 is a view showing an example of an image projection system to which the present invention is applied.

1, the image projection system 1 includes a curved screen 10, a projector 20, a curved mirror 30 and first to third supports 40-1 to 40-3, Time).

First, the first support 40-1 can perform a role of fixing the curved mirror 30. The first support 40-1 can support the curved mirror 30 so that the lens direction of the projector 20 is directed to the curved mirror 30. [

In addition, the second and third supports can secure the projector 20 and the curved screen 10. On the other hand, the first to third supports may be integrally formed.

The curved screen 10 is an area where an image is displayed. The curved screen 10 consists of a curved surface rather than a flat surface. The curved surface may be formed in the shape of a sphere, an ellipse, a cylinder, or the like.

The projector 20 corresponds to a device for projecting an image in a beam form. The projector 20 can be disposed on the upper surface or the lower surface of the curved screen 10.

In addition, the projector 20 can receive an image from an image source device (not shown, for example, a PC) and project an image on the curved mirror 30.

The projector 20 can perform the keystone correction by tilting itself. Keystone correction can be said to be a correction to correct image distortion.

In addition, an image source device (not shown) for providing an image to the projector 20 may include an apparatus and software capable of detecting and correcting image distortion.

The curved mirror 30 may be disposed on the optical path of the image projected from the projector 20. [ The curved mirror 30 may be arranged to reflect the image beam projected from the projector 20 to the curved screen 10 so that the image is reproduced on the curved screen 10.

When the image projection system 1 adopts a flat mirror, the projection distance is inevitably lengthened. The image projection system 1 proposed in the present invention employs a curved mirror, and the projection distance can be made shorter than that in the case where a flat mirror is employed.

In addition, the present image projection system 1 can provide a curved screen having the same curvature as that of the curved mirror, thereby alleviating image distortion due to the use of the curved mirror.

In addition, the present image projection system 1 provides advantages in that, in the case where a viewer shadows a screen by covering an image beam, it is more advantageous than when a flat mirror is employed. If a flat mirror is employed, the projection distance is also relatively longer, which is more likely to be obscured by the viewer.

2 is a block diagram of an image projection system according to an embodiment of the present invention.

2, the image projection system 1 may include an image source apparatus 100 and a projector 200. [ The image projection system 1 includes a curved mirror and a curved screen but will not be described here.

The image source device 100 is an apparatus for providing an image to the projector 200. The image source device 100 may be a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC, A tablet PC, an ultrabook, a wearable device (e.g., a smartwatch, a glass glass, a head mounted display (HMD)), etc. have. In addition, the image source apparatus 100 may include an image digital TV, a desktop computer, a digital signage, and the like.

The image source apparatus 100 may transmit the image to the projector 200 by wire or wirelessly. In addition, the image source apparatus 100 may be equipped with software or the like capable of correcting image distortion when distortion occurs in the image.

Also, the image source apparatus 100 can detect that the image is displayed on the curved screen by the projector 200, and adjust the image so that the image itself is displayed on the curved screen.

The projector 200 may receive an image from the image source apparatus 100 and display the image in the form of a beam with a curved mirror. The image projection system requires a certain distance (projection distance) to be reduced between the projector 200 and the screen.

The projector 200 can correct the distortion of the image by adjusting the keystone of the image when the projector 200 is inclined.

Here, the keystone distortion means a distortion generated when the image beam is inclined to reach the screen. In this case, the projector 200 can correct the distortion of the image by adjusting the keystone.

In addition, the projector 200 can control the image so that the image reflected by the curved mirror does not meet a specific area of the viewer. That is, the projector 200 can adjust the image so that the image beam does not reach the viewer.

Meanwhile, the image source apparatus 100 can also perform the keystone adjustment function of the projector 200 and the function of controlling the image so that the viewer does not touch the image beam.

3 to 5 are views showing the structure of the image projection system shown in FIG. 1 in detail.

According to Fig. 3, when a line parallel to the bottom surface is F and a line parallel to the F line is C, the projector 320 is inclined at C line and T degrees.

An angle T at which the projector 320 is tilted can be set within a range in which the projector 320 can perform keystone correction. Here, the keystone correction function is a function of correcting the distortion of the image due to the inclination of the projector 320. [

The projector 320 can project an image.

The path of the beam toward the uppermost portion of the curved mirror 330 is referred to as A1 path and the path along which the A1 path is reflected by the curved mirror 330 is referred to as A2 path. The path of the beam that the projector 320 faces toward the lowermost part of the curved mirror 330 is referred to as a B1 path and the path that the B1 path reflects from the curved mirror 330 is referred to as a B2 path.

 Here, the image projection system 1 can be set so that the angle A1B2 formed by A1 and B2 is smaller than the angle B1A2 formed by B1 and A2. Otherwise, light interference may occur.

Also, the sum of A1 path and A2 path must be greater than or equal to the minimum projection distance so that the image on the curved screen 310 can be clearly seen.

In addition, the image system 1 can configure each B2F formed by B2 and F to be 90 degrees or less.

At this time, the user must view the curved screen 310 on the right side of the B2 path so that the curved screen 310 is not shadowed.

Here, the curvature of the curved screen 310 and the curved mirror 330 of the image system 1 can be set to be the same. For example, the imaging system 1 may configure the curved screen 310 and the curved mirror 330 to be spherical.

Herein, the image projection system 1 can maintain a plurality of vertical distances VD1 to VD3 between the curved screen 310 and the user at a constant distance from the vertical distance of the flat display. Accordingly, the image projection system 1 can further enhance the image immersion feeling to the user.

4 is a diagram illustrating an image projection system when a curved screen and a curved mirror according to an embodiment of the present invention are configured in a spherical shape.

4, the image projection system 1 can generate an image and provide it to the projector 420. [ The projector 420 can project an image to the spherical mirror 430 at the projector center point Pp.

In this case, the image projection system 1 can arrange the center point Mp of the spherical mirror 430 and the center point Sp of the spherical screen 410 on a straight line. In this case, the image projection system 1 can alleviate the horizontal distortion of the image.

The image projection system 1 sets the curvatures of the curved mirror 430 to be equal to the curvature of the curved screen 410 so that the center point Mp of the mirror, the center point Sp of the screen, and the center point Pp of the projector It can be arranged in a straight line, and the distortion of the image can be relieved.

In addition, the user can reduce the keystone distortion occurring in the spherical screen 410 by adjusting the keystone in the opposite direction by the angle (T) at which the projector 420 is tilted. Accordingly, the image projection system 1 can alleviate distortion of the image without correction by software, and can set the image to be evenly projected on the whole of the spherical screen 410.

In addition, in the image projection system 1, the plurality of vertical distances HD1 to HD3 between the spherical screen 410 and the user can be maintained at a constant distance from the vertical distance of the flat display. Accordingly, the image projection system 1 can further enhance the image immersion feeling to the user.

5 is a view illustrating an image projection system according to an embodiment of the present invention.

According to Fig. 5, according to Fig. 3, when a line parallel to the bottom surface is denoted by C and a line parallel to the C line is denoted by F, the projector 320 is inclined from the C line to the T line.

The projector 320 may be disposed at the lower end of the curved screen 310. Although it is described herein that the projector 320 is disposed at the upper and lower ends of the curved screen 310, it is also within the scope of the present invention to arrange the projector 320 in the left / right direction of the curved screen 310 . However, in this case, the curved mirror 330 may also be changed to the corresponding position.

The projector 320 can project an image onto the curved mirror 330. The path of the beam toward the uppermost portion of the curved mirror 330 is referred to as A1 path and the path along which the A1 path is reflected by the curved mirror 330 is referred to as A2 path. The path of the beam that the projector 320 faces toward the lowermost part of the curved mirror 330 is referred to as a B1 path and the path that the B1 path reflects from the curved mirror 330 is referred to as a B2 path.

 Here, the angle A1B2 formed by A1 and B2 should be smaller than the angle B1A2 formed by B1 and A2. Otherwise, light interference may occur.

Also, the sum of A1 path and A2 path must be greater than or equal to the minimum projection distance so that the image on the curved screen 310 can be clearly seen.

Herein, the image projection system 1 can maintain a plurality of vertical distances VD1 to VD3 between the curved screen 310 and the user at a constant distance from the vertical distance of the flat display. Accordingly, the image projection system 1 can further enhance the image immersion feeling to the user.

 FIG. 6 is a diagram showing an image projected in the image projection system shown in FIG. 1. FIG.

According to FIG. 6, the image projection system 1 may include a curved screen 310, a projector 320, and a curved mirror 330. Further, the image projection system 1 may further include a support.

The image projection system 1 may display an image on the curved screen 310. An image source device (not shown) may generate an image and transmit the image to the projector 320. The projector 320 transmits the image in the form of a beam to the curved mirror 330, and the curved mirror 330 can display the reflected image on the curved screen 310.

In this case, the image projection system 1 can maintain a plurality of vertical distances (VD1 to VD3, Vertical Distance) between the curved screen 310 and the user at a constant distance from the vertical distance of the flat display. In addition, the image projection system 1 can maintain a plurality of horizontal distances (HD1 to HD3) between the curved screen 310 and the user at a constant distance from the vertical distance of the flat display. Accordingly, it is possible to provide the user with an image immersion feeling.

7 and 8 are views showing various embodiments in which the image projection system proposed in the present invention is applied.

7, an image may be displayed on the curved screen 310. [

In this case, the image source device (not shown) provides the image to the projector, and the projector can provide the image to the user using the curved mirror and the curved screen.

In this case, the image projection system 1 can provide an image immersion feeling to the user.

In particular, when a 3D image is generated and provided to a user, a video source device (not shown) can provide a better image immersion feeling to the user.

According to FIG. 8, the image projection system 1 can provide a user with an image that increases motion effects in load (GYM).

The image projection system 1 can provide a user with a more excellent motion effect by providing a user with a more immersive feeling image.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

1: Image projection system 100: Image source device
200: Projector

Claims (5)

In an image projection system,
Curved mirror;
An image source device for providing an image to a projector;
A curved screen on which the image is displayed;
And a projector disposed on an upper surface or a lower surface of the curved screen and projecting the image onto the curved mirror,
Wherein the curved mirror comprises:
Wherein the curved surface of the curved mirror is disposed on an optical path of an image projected from the projector, and the curved surface of the curved mirror reflects the image and displays the curved surface on the curved screen. The method according to claim 1,
Wherein the curved mirror and the curved screen are configured as spheres, cylinders, and ellipses. The method according to claim 1,
Further comprising a curved mirror, the curved screen, and a support for fixing the projector. The method according to claim 1,
The projector includes:
Wherein when the projector is tilted, the keystone of the image is adjusted to correct the distortion of the image, and the image is controlled so that the image reflected by the curved mirror does not meet a specific area of the viewer. The method according to claim 1,
Wherein the curved mirror and the curved screen are configured in a spherical shape,
Wherein a center point (Pp) of the projector, a center point (Mp) of the curved mirror, and a horizontal center of a center point (Sp) of the curved screen are arranged on a straight line.

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