WO2015183218A1

WO2015183218A1 - A super multi-view image display system

Info

Publication number: WO2015183218A1
Application number: PCT/TR2015/000195
Authority: WO
Inventors: Hakan Urey; Kaan AKSIT; Amir Hossein GHANBARINIAKI
Original assignee: Koç Üniversitesi
Priority date: 2014-05-30
Filing date: 2015-05-08
Publication date: 2015-12-03

Abstract

The super multi-view image display system (D) according to the present invention comprises at least one screen (1) sending at least two different images, taken from different perspectives of the same scene, to each eye (E) of the viewer and at least one pair of glasses (2) filtering the image generated on the screen (1) such that at least two different images are sent to at least two areas of each pupil (E1) of the viewer. Said glasses (2) comprise two optical members (2a) filtering an image displayed on the screen (1) such that different image are sent to at least two different areas of each pupil (E1) of the viewer and allowing different images sent to each eye (E) to pass through different areas of the pupil (E1); each optical member comprising a first filter layer (3) allowing a different filtering of the image coming from the screen (1) for different eyes (E); and a second filter layer (4) that has at least two filters (5) allowing different images sent to each eye (E) to pass through different areas of the optical member and a barrier (6) interposed between the filters (5).

Description

DESCRIPTION

A SUPER MULTI-VIEW IMAGE DISPLAY SYSTEM Field of the Invention

The present invention relates to display systems that generate super multi-view images. Background Art

With the developing technology, an increased interest is seen in the three-dimensional display systems that enable a three-dimensional display of an environment and/or an object (along with depth information), by means of a screen. Said three-dimensional display systems are mainly accomplished by sending a different image to each eye of a viewer. Sending different images to the eyes of the viewer is usually achieved by so-called three-dimensional glasses. Said three-dimensional glasses send a portion of an image reflected from a screen (which may be television screen or a projection screen) to an eye of the user while sending another portion thereof to the other eye of the user. In this way, a three-dimensional perception is created by sending different images to the eyes of the viewer.

In addition to three-dimensional display systems wherein a different image is sent to each eye of the viewer, those three-dimensional display systems are also being developed wherein at least two different images are sent to each eye of the viewer. In this display systems called as super multi-view (SMV), different images are sent to the different areas of an eye of a viewer, whereby a three-dimensional image perception is achieved even in a single eye.

As disclosed in the prior art document US2014104399A1 , systems that generate super multi-view images comprise complicated mechanisms. Furthermore, prior art systems wherein super multi-view images are generated require that the user is located right across the screen. For such reasons, prior art super multi-view image generating systems are not suitable for individual use (i.e. home) or collective use (i.e. cinema). Brief Description of the Invention

The display system according to the present invention comprises at least one screen sending at least two different images, taken from different perspectives of the same scene, to each eye of the viewer and at least one glasses filtering the image formed on the screen such that at least two different images are sent to at least two areas of each pupil of the viewer. Said glasses comprise at least two optical members filtering an image displayed on the screen such that a different image is sent to at least two different areas of each pupil of the viewer and allowing different images sent to each eye to pass through different areas of the pupil; at least a first filter layer located on the optical member and allowing a different filtering of the image coming from the screen for different eyes; and at least a second filter layer that has at least two filters allowing different images sent to each eye to pass through different areas of the pupil and at least one barrier interposed between the said filters.

In the display system of the present invention, by supplying at least four different images from the screen and sending said images to different parts of the viewer's pupil through the glasses, super multi-view images are displayed to the viewers. Since complicated mechanical or electronic structures are not used in the said display system, the cost of the display system is lowered and it is made to be easy to use. Furthermore, the display system is adapted for both individual use (i.e. home) and collective use (i.e. cinema).

Object of the invention An object of the present invention is to provide a display system that presents to the viewers a super multi-view image.

Another object of the present invention is to provide a display system suited for both individual use and collective use.

A further object of the present invention is to provide a display system that is cost-effective and easy to use. Description of the Drawings

The exemplary embodiments of the display system according to the invention are illustrated in the enclosed drawings, in which:

Figure 1 is a top view of the inventive display system.

Figure 2 is a front view of a glasses used in the display system.

Figure 3 is a front view of another glasses used in the display system.

Figure 4 is a front view of a further glasses used in the display system.

Figure 5 is a top view of a further glasses used in the display system.

All the parts illustrated in the figures are individually assigned a reference numeral and the corresponding terms of these numbers are listed as follows:

Display system (D)

Eye (E)

Pupil (E1 )

Screen (1 )

Glasses (2)

Optical member (2a)

First filter layer (3)

Second filter layer (4)

Filter (5)

Barrier (6)

Movable barrier (7)

Description of the Invention

In the systems which are considered as advanced version of three-dimensional display systems that send a different image to each eye of the viewer and generate super multi- view images, at least two different images are sent to each eye of the viewer in order to create a three-dimensional perception. However, since super multi-view image generating systems generally include complicated mechanical structures, they are not suitable for end users. Therefore, with the present invention, there is provided a display system which generates super multi-view images, which is easy to use and implement.

The display system (D) according to the present invention, the exemplary embodiments of which are illustrated in figures 1 to 4, comprises at least one screen (1) sending at least two different images, taken from different perspectives of the same scene, to each eye (E) of the viewer and at least one glasses (2) filtering the image generated on the screen (1 ) such that at least two different images are sent to at least two areas of each pupil (E1 ) of the viewer. Said glasses (2) comprise at least two optical members (2a) that filter images sent to each eye (E) and at least a first filter layer (3) located on each optical member (2a) and filtering a portion of the image coming from the screen (1 ) in order to send an image to an eye (E) different from that sent to the other eye (E). The glasses (2) also comprises at least a second filter layer (4) located on each optical member (2a) and having at least two filters (5) for sending different images, sent to each eye (E), to different areas of the pupil (E1 ) and at least one barrier (6) interposed between said filters (5). Said barrier (6) is impervious to light (or images). Said first filter layer (3) may be in the form a polarized filter, a color filter or a shutter glass. Similarly, said filter (5) may also be in the form a polarized filter, a color filter or a shutter glass. However, here it is preferred that filtering structures used in the first filter layer (3) and in the said filter (5) are different from each other. For example, if the said first filter layer (3) is in the form a polarized filter, then the filter (5) is in the form of a color filter or a shutter glass. Said screen (1 ) may either be in the form of a television or a screen (i.e. cinema screen) reflecting an image sent from a projection device. In an illustrative embodiment of the invention, four different images sent from the screen (1 ) are filtered through the first filter layers (3) provided on the optical members (2a) and two different images are sent to each eye (E) of the viewer. The different images sent to each eye (E) are filtered through the filters (5) on the second filter layer (4), thereby allowing different images to be sent to two different areas of each pupil (E1 ) of the viewer.

With the barrier (6) provided in the glasses (2) used in the display system (D) according to the present invention, the width and the parallax opening and the depth perception of the image sent from the screen (1 ) to different areas of the pupil (E1 ) is adjusted. The said image width is also called as smaller angular resolution (0_spot). In order for the eye (E) to perform an accurate resolution of the pixel details on the screen (1 ), the value of the said smaller angular resolution must be lower than a pixel width on the screen (1 ). With the said barrier (6), the value of the smaller angular resolution is rendered lower than a pixel width on the screen (1 ). With the said barrier (6), the visual range (9_Fov) of the eye (E) is divided and smaller angular resolutions (6_spot) for different images are lowered. In this way, the viewer's eye (E) is allowed to resolve pixel details shown on the screen (1 ) so that the viewers are provided with a higher-quality sight.

In a preferred embodiment of the invention, at least two filters (5) located on the second filter layer (4) are positioned side by side, in a strip form, such that a barrier (6) is interposed in between, as shown in Figure 2. In this embodiment, the second filter layer

(4) may comprise more than two filters (5). In an illustrative embodiment, adjacent filters

(5) filter different images whereas every other filter next to a filter (5) filters same images. For example, said filters (5) are color filters for red/turquoise while the arrangement of the filters (5) on the horizontal plane is "red-turquoise-red-turquoise... ". In other words, in this embodiment, a plurality of filters (5) filtering two different images are successively arranged on the second filter layer (4). Thus, different images are sent to a plurality of successive areas (different parts on the horizontal axis) of the viewer's pupil (E1 ) so that the quality of the image is increased.

In an alternative embodiment of the invention, shown in Figure 3, the second filter layer (4) includes at least four filters (5). In this embodiment, said filters (5) are circular and disposed such that at least two filters are located on the horizontal and vertical axis. Preferably, filters (5) that are adjacent on the horizontal axis filter different images. However, every other filter next to a filter (5) on the horizontal axis filters the same images. Thus, different images are sent to a plurality of successive areas (different parts on the horizontal axis) of the viewers pupil (E1 ) so that the quality of the image is increased. In another alternative embodiment of the invention shown in Figure 5, said second filter layer (4) comprises three filters (5) each filtering a different image. In this embodiment, each filter (5) is a color filter. In an illustrative embodiment, a filter (5) filters red whereas the other filter (5) filters blue and another one (5) filters green. In other words, a filter (5) is red, a filter (5) is blue and a filter (5) is green. In this way, different images may be sent to three different parts of a pupil (E1 ) of the viewer. In this embodiment, said filters (5) are preferably arranged such that the distance of each filter to the other two is equal. In an exemplary arrangement, each filter (5) is positioned on the corners of an imaginary equilateral triangle. In this way, different perspective images may be sent to the eye (E) both on the horizontal and vertical axis.

The value of the smaller angular resolution (θ_5ρο() is mainly based on the distance of the eye (E) to the three-dimensional image generated and on the width of the filters (5) separated by the barrier (6). Therefore, the value of the smaller angular resolution (0_{s o}t) indirectly changes depending on the distance of the user to the screen (1 ). Therefore, in an illustrative embodiment of the invention shown in Figure 5, the said second filter layer (4) comprises at least two movable barriers (7) that change the width of the said filters (5). By moving the said movable barrier (7) with respect to the distance of the viewer's eye (E) to the screen (1 ), the value of the smaller angular resolution (θ_8ρο is brought to the desired level (i.e. the said value is adjusted to be smaller than the pixel width on the screen (1 )). Thus, a high-quality image is presented to the viewer even in different screen (1 ) distances.

In an illustrative embodiment of the invention, the first filter layer (3) is a polarized filter (or a color filter) whereas the filter (5) on the second filter layer (4) is a color filter (or a polarized filter). In this embodiment, said three-dimensional display system is used as a super multi-view display system (D) by changing the image displayed on the screen used in a conventional three-dimensional display system. In other words, the display system (D) according to the present invention may be used with the already used three-dimensional screens. Furthermore, in this embodiment, instead of 3 main color channels of each different perspective image, only the respective color channel of each image is sent through the respective area of the pupil (E1 ), whereby a super multi-view image may be obtained on a screen (1 ) without performing a frame rate up conversion. In the display system (D) of the present invention, by supplying at least four different images from the screen (1 ) and sending said images to different parts of the viewer's pupil (E1 ) through the glasses (2), super multi-view images are displayed to the viewers. Since complicated mechanical or electronic structures are not used in the said display system (D), the cost of the display system (D) is lowered and it is made to be easy to use. Furthermore, the display system (D) is adapted for both individual use (i.e. home) and collective use (i.e. cinema).

Claims

1. A display system (D) comprising at least one screen (1 ) sending at least two different images, taken from different perspectives of the same scene, to each eye (E) of the viewer, characterized by comprising at least one glasses (2) having

- at least two optical members (2a) that filter the image displayed on the screen (1 ) such that a different image is sent to at least two different areas of each pupil (E1 ) of the viewer and allowing different images sent to each eye (E) to pass through different areas of the pupil (E1 ),

- at least a first filter layer (3) located on the optical member (2a) and allowing a different filtering of the image coming from the screen (1 ) for different eyes (E); and

- at least a second filter layer (4) that has at least two filters (5) allowing different images sent to each eye (E) to pass through different areas of the pupi! (E1 ) and at least one barrier (6) interposed between the said filters

(5).

2. A display system (D) according to claim 1 , characterized in that the said second filter layer (4) comprises three filters (5).

3. A display system (D) according to claim 2, characterized in that the said filters (5) are color filters each filtering a different color.

4. A display system (D) according to claim 2 or 3, characterized in that one of the said filters (5) filters red_: one of them filters blue and one of them filters green.

5. A display system (D) according to claim 1 , characterized in that the said first filter layer (3) is a polarized filter.

6. A display system (D) according to claim 1 , characterized in that the said first filter layer (3) is a color filter.

7. A display system (D) according to claim 1 , characterized in that the said first filter layer (3) is a time-division multiplexing filter.

8. A display system (D) according to claim 1 , characterized in that the said filters (5) are in the form of a strip.

9. A display system (D) according to claim 1 , characterized in that the said filters (5) are circular.

10. A display system (D) according to claim 1 , characterized in that the said second filter layer (4) comprises at least two movable barriers (7) that change the width of the filters (5).

11. A display system (D) according to claim 1 , characterized in that the said screen (1 ) is a television.

12. A display system (D) according to claim 1 , characterized in that the said screen (1 ) is screen displaying an image reflected from a projection device.

13. A display system (D) according to claim 1 , characterized in that the first filter layer (3) is a polarized filter, and the filter (5) located on the second filter layer (4) is a color filter.

14. A display system (D) according to claim 1 , characterized in that the first filter layer (3) is a color filter, and the filter (5) located on the second filter layer (4) is a polarized filter.