KR101575147B1

KR101575147B1 - Glasses-free 3D display device

Info

Publication number: KR101575147B1
Application number: KR1020140062890A
Authority: KR
Inventors: 한준구; 김성민
Original assignee: 경북대학교 산학협력단
Priority date: 2014-05-26
Filing date: 2014-05-26
Publication date: 2015-12-08
Also published as: KR20150136157A

Abstract

The present invention comprises a display for outputting images, a camera for capturing a plurality of viewers, and a control unit for controlling the plurality of viewers to output stereoscopic images simultaneously through the display, A backlight panel arranged in a direction substantially orthogonal to the image panel at a rear lower side of the image panel and outputting linearly polarized light in a first direction, A first beam splitter disposed at a predetermined angle between the image panel and the backlight panel, and a second beam splitter disposed at a rear surface of the image panel, The circularly polarized light in the first direction is divided into the circularly polarized light in the second direction And a second retardation film disposed on the rear surface of the image panel to convert circularly polarized light in a second direction applied from the reflection plate into linearly polarized light in a second direction to provide the linearly polarized light to the image panel The control unit checks the positions of the left and right eyes of a plurality of viewers by using the images photographed through the camera, and simultaneously drives the backlight pixels corresponding to a plurality of left eye positions on the left eye image time, Eye images are converged to a left eye position of a plurality of viewers through a panel, and at the same time, backlight pixels corresponding to a plurality of right eye positions are simultaneously driven on the right eye image time, Is converged.
According to the present invention, the output light source of the backlight panel is selectively driven so as to correspond to the left or right eye of a viewer, and the left eye image and the right eye image for a plurality of viewers are simultaneously displayed and output through the image panel in a time sequential manner, The stereoscopic image can be viewed without degrading the resolution at the same time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a three-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-eye-tightening stereoscopic image display apparatus, and more particularly, to a non-eye-wear stereoscopic image display apparatus that allows a plurality of viewers to simultaneously view a three-dimensional image.

Recently, a stereoscopic image display device for providing a three-dimensional image has been developed and commercialized. The three-dimensional image is made to recognize the distance feeling by making a difference between the images displayed on the left and right eyes of the viewer, so that a vivid image appears in three dimensions in front of the eyes.

In the stereoscopic image display method, there are a display using glasses and a non-glasses display. Particularly, in recent years, there has been an inconvenience that viewers have to wear glasses, and thus a stereoscopic image display apparatus of a non-eyeglass display type is being preferred.

At present, the lenticular lens system and the parallax barrier system are typical examples of the non-eyeglass display system.

However, in the above-described lenticular lens system, a lenticular lens is disposed in a display device, and a semicircular lens is disposed on the display device, so that a wave pattern is seen.

In addition, the parallax barrier system has a merit that a barrier is arranged on a display device, a display device is easily manufactured, and a wave pattern is not seen unlike a lenticular lens system. However, since the parallax barrier has a narrow viewing angle, There is an inconvenience that the stereoscopic effect disappears and the viewing position is fixed.

In addition, in the case of constructing a display device by applying the conventional non-eyeglass display system, at least one or more viewers are provided with a 3D stereoscopic image at a multi-view point considering that the display image is viewed at all positions, The image quality is deteriorated.

1. Korean Patent Laid-Open No. 10-2011-0109565 (title of the invention: backlight unit, 3D display with the same and 3D image forming method) 2. Korean Patent Laid-Open No. 10-2014-0051072 (entitled " Viewing Area Movable Type Non-Glasses 3D Display Device and Method)

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a stereoscopic image display apparatus and a stereoscopic stereoscopic image display method, Eye stereoscopic image display apparatus that enables a plurality of viewers to simultaneously view high-quality 3D stereoscopic images by providing right-eye images at the same time.

According to another aspect of the present invention, there is provided a display device including a display for outputting images, a camera for capturing a plurality of viewers, and a control unit for controlling the plurality of viewers to simultaneously output stereoscopic images through the display, The display includes a video panel for transmitting linear polarized light in a second direction and outputting a display image, and a display panel disposed in a rear lower side of the video panel in a direction substantially orthogonal to the video panel, A first retardation film disposed on an upper surface of the backlight panel for converting linearly polarized light in a first direction into circularly polarized light in a first direction and outputting the circularly polarized light in a first direction, and a second retardation film disposed obliquely at an angle between the image panel and the backlight panel Shaped beam splitter which is spaced from the rear surface of the image panel by a predetermined distance And a circular polarized light in a second direction, which is arranged on the rear surface of the image panel and is applied from a reflection plate, is arranged in a first direction, And a second phase difference film for converting the light into linearly polarized light and providing the same to an image panel, wherein the control means confirms the positions of the left and right eyes of the plurality of viewers using the image photographed through the camera, The backlight pixels corresponding to the left eye position of the left eye of the viewer are simultaneously turned on so that the left eye image is converged to the left eye position of the plurality of viewers through the image panel and the backlight pixels corresponding to the right eye positions are simultaneously And controls the right eye image to converge to the right eye position of a plurality of viewers through the image panel The Muan rigid three-dimensional image display apparatus of ranging is provided.

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The non-eye-tightening stereoscopic image display device is characterized in that the linearly polarized light in the first direction is linearly polarized light in the horizontal direction and the linearly polarized light in the second direction is linearly polarized light in the vertical direction.

The non-eye-tightening stereoscopic image display device is characterized in that the circular polarized light in the first direction is circularly polarized light in the counterclockwise direction and the circularly polarized light in the second direction is circularly polarized light in the clockwise direction.

In addition, the image display panel is configured by a thin film transistor-liquid crystal display panel (TFT-LCD panel) having an RGB (Red Green Blue) arrangement.

The backlight panel may include a plurality of pixels including a light source, and the light source may be a light emitting diode (LED) or an organic light emitting diode (OLED). .

The non-eyeglass stereoscopic image display device is characterized in that the backlight panel is constituted by an LCD (Liquid Crystal Display) panel.

In addition, the image display panel or the backlight panel may include a panel having a driving speed of 120 Hz or more.

Also, the control means is configured to calculate the plane position coordinates of the pupil of the left eye and the pupil of the right eye of the viewer photographed from the camera.

Also, the non-eye-tightening stereoscopic image display device is characterized in that the reflection plate is a mirror.

According to the present invention, the output light source of the backlight panel is selectively driven so as to correspond to the left or right eye of the viewer, and the left eye image and the right eye image for a plurality of viewers are simultaneously displayed and outputted through the image panel in a time sequential manner, The stereoscopic image can be viewed without deterioration of the stereoscopic image.

1 is a schematic view of a non-eye-warming stereoscopic image display apparatus according to a first embodiment of the present invention.
Fig. 2 is a block diagram showing the internal structure of the control means 300 shown in Fig. 1 functionally separated; Fig.
Fig. 3 is a diagram showing the configuration of the display 100 shown in Fig. 1; Fig.
4 is a view showing an example of right eye image output for a plurality of viewers of the display 100 shown in Fig.
5 is a diagram showing an example of output of a left eye image and a right eye image of the display 100 shown in FIG.
6 is a diagram illustrating a schematic configuration of a non-eye-warming stereoscopic image display apparatus according to a second embodiment of the present invention.
7 is a diagram for explaining a video output process of the display 500 shown in FIG.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view of a non-eye-warming stereoscopic image display apparatus according to a first embodiment of the present invention.

1, the non-eye-wear stereoscopic image display apparatus includes a display 100 for outputting images, a camera 200 for capturing a plurality of viewers, And the left and right eye images corresponding to the left eye and right eye positions of the respective viewers are separated and output through the display 100 with a time difference, thereby displaying a 3D stereoscopic image through the display 100 And control means (300) for controlling the output of the control signal.

Here, the display 100 basically includes an image panel for displaying and outputting a display image, and a backlight panel for selectively outputting an image provided to the image panel. That is, the display 100 is provided with a display image as an image panel, and the backlight panel is configured to supply light to the image panel, so that the display image is displayed and output through the image panel by the light supplied from the backlight panel do.

In addition, the camera 200 may be disposed at a position where the viewer is easily photographed.

2, the control unit 300 includes an image driving unit 310 that provides a display image provided from the outside to a video panel of the display 100, a light source of a backlight panel of the display 100, A data memory 330 in which backlight pixel position information corresponding to the viewing position is stored, a backlight driver 320 for on / off driving the left and right eyes of the viewer, And controls the backlight pixels corresponding to the plurality of left eye position coordinates to be simultaneously turned on so that the left eye image is converged on the left eye pupil of the plurality of viewers at the time of the left eye image time by providing the display image through the image panel In the right eye image time, the right eye image is converged on the right eye pupil of a large number of viewers by the image panel, It is configured to include the controller 340 is configured to control to drive the back light on the pixel corresponding to the coordinate value at the same time.

3 is a diagram illustrating the configuration of the display 100 shown in FIG. 1 in more detail.

3, the display 100 includes an image panel 110 and a backlight panel 120 disposed in a direction substantially orthogonal to the image panel 110, for example, A beam splitter 130 arranged at an angle between the image panel 110 and the backlight panel 120 at an angle and a curved surface spaced apart from the rear surface of the image panel 110 by a predetermined distance, And more particularly, includes a parabolic reflector 140. The separation distance between the reflection plate 140 and the image panel 110 may be appropriately set according to the inclination angle between the splitter 130 and the backlight panel 120 or the radius of curvature of the reflection plate 140. It is needless to say that the coupling between the above-described devices can be fixed by using a coupling member such as a bracket or a screw, or a supporting member.

Here, the image panel 110 is a panel for outputting a display image, and may be a TFT-LCD panel (Thin Film Transistor-Liquid Crystal Display) panel of RGB (Red Green Blue) arrangement. At this time, it is preferable that the image panel 110 includes a panel having a driving speed of 120 Hz or more in order to prevent degradation of resolution.

The backlight panel 120 includes a plurality of pixels including a light source (not shown), and the display image corresponding to the corresponding pixel is displayed on the image panel 110 Output. Here, the light source of the backlight panel 120 may be an LED (Light Emitting Diode) or an OLED (Organic Light Emitting Diode). Also, the backlight panel 120 may be a liquid crystal display (LCD) panel in which a point light source array is implemented. In addition, the backlight panel 120 preferably includes a panel having a driving speed of 120 Hz or more in order to prevent degradation of resolution.

The beam splitter 130 changes the path of the light output from the backlight panel 120 to the reflector 140 side and outputs the reflected light reflected from the reflector 140 to the side of the image panel 110 do.

The reflection plate 140 reflects the light from the beam splitter 130 and provides the reflected light to the image panel 110 through the beam splitter 130. At this time, the reflection plate 140 may be a mirror.

3, when any pixel is turned on in the backlight panel 120, the light emitted from the light source of the corresponding pixel passes through the beam splitter 130 and the reflection plate 140 And the image panel 110 outputs the display image to the viewing position corresponding to the light provided from the backlight panel 120. [

At this time, the control means 300 turns on the pixels corresponding to the left eye pupil position of the viewer among the pixels of the backlight panel 120 corresponding to the left eye image region in the image panel 110 at the left eye image time, The pixels corresponding to the viewer's right eye pupil position among the pixels of the backlight panel 120 corresponding to the right eye image region of the image panel 110 are turned on.

Here, the control unit 300 provides a display image of the left eye image region by the image panel 110 at the left eye image time, and provides a display image of the right eye image region by the image panel 110 at the right eye image time .

The operation of the non-eye-warming stereoscopic image display apparatus having the above-described configuration will now be described.

First, the control means 300 calculates and stores the backlight driving pixel information corresponding to the pupil position of the viewer in advance. That is, the control means 300 has a backlight pixel coordinate mapping table for the plane coordinates of the pupil.

In the above-described state, the front side of the display is photographed through the camera 200, and the photographed information is provided to the control means 300.

The control means 300 tracks the left eye and the right eye pupil of the viewer from the photographed image photographed through the camera 200 and calculates coordinates on a plane with respect to the pupil.

Then, the control means 300 reads the backlight driving pixel information corresponding to the left eye coordinate at the left eye image time of the viewer to drive the corresponding pixel light source of the backlight panel 120, and the right eye image time corresponding to the right eye coordinate The backlight driving pixel information is read and the corresponding pixel light source of the backlight panel 120 is driven. At this time, the control means 300 simultaneously drives a plurality of backlight pixels corresponding to a plurality of viewers' left eye coordinates at a left eye image time for a plurality of viewers, and a plurality of backlight pixels corresponding to a plurality of viewer right eye coordinates simultaneously .

For example, as shown in FIG. 4, the display 100 outputs a display image so that the same right eye image is simultaneously converged on right eye pupils of a plurality of viewers, for example, three viewers, at the right eye image time. At this time, although not shown, the display 100 outputs the display image so that the same left eye image is simultaneously converged in the left eye pupil of the three viewers at the left eye image time.

That is, the display 100 successively outputs the left-eye image and the right-eye image with a time lag, and as shown in FIG. 5 for each viewer, a left- So that the stereoscopic images according to the binocular disparity can be viewed.

Thus, according to the embodiment, the light source output from the backlight panel 120 is selectively driven to correspond to the pupil positions of a plurality of viewers, and the left eye image and the right eye image for a plurality of viewers are sequentially displayed through the image panel 110 So that a plurality of viewers can watch the same stereoscopic image at the same time without degrading the resolution.

The light source output from the backlight panel 120 is directly applied to the image panel 110 through the beam splitter 130 without passing through the reflection plate 140, A display image of an object point of view may be output.

Therefore, in the present invention, it is possible to solve the problem of outputting a display image of an unintended view point by using a retardation film.

FIG. 6 is a schematic view illustrating a non-eye-warming stereoscopic image display apparatus according to a second embodiment of the present invention. 6, the same reference numerals are assigned to the same components as those shown in Figs. 1 and 3, and a detailed description thereof will be omitted.

6, the non-eye-warming stereoscopic image display apparatus according to the second embodiment of the present invention further includes a first retarder film 510 on the upper side of the backlight panel 120, And a second retarder film 520 is further provided on the rear surface of the panel 110.

Here, the first retardation film 510 converts the linearly polarized light into the circularly polarized light, and the second retardation film 520 converts the circularly polarized light into the linearly polarized light.

FIG. 7 is a diagram for explaining a video output process of the display 500 shown in FIG.

7, when any pixel of the backlight panel 120 is turned on according to the driving signal provided from the control unit 300, the display 500 outputs the light output from the pixel in the on- The linearly polarized light in the horizontal direction is converted into the circularly polarized light in the first direction, for example, the counterclockwise direction, while passing through the first retardation film 510. [

The counterclockwise circularly polarized light having passed through the first retardation film 510 is applied to the reflection plate 140 through the beam splitter 130 and the counterclockwise circularly polarized light applied to the reflection plate 140 is reflected by the reflection plate 140 140, and is converted into circularly polarized light in the second direction, for example, clockwise direction.

The circularly polarized light in the clockwise direction reflected through the reflection plate 140 is applied to the second retardation film 520 through the beam splitter 130 and the circularly polarized light in the clockwise direction applied to the second retardation film 520 The light is converted into linearly polarized light in a second direction, for example, a vertical direction while passing through the second retardation film 520, and is provided to the image panel 110. Here, the image panel 110 transmits linearly polarized light in a specific direction, that is, linearly polarized light in a vertical direction.

That is, in the display 500, a circular polarized wave in a first direction, i.e., a counterclockwise direction, generated through the backlight panel 120 and the first retardation film 510 is incident on the beam splitter 130 and the second retardation film 520 The light is transmitted through the second retardation film 520 and becomes linearly polarized light in the horizontal direction so that it is not transmitted to the image panel 110 transmitting only linearly polarized light in the vertical direction.

Therefore, according to the embodiment, the light source output from the backlight panel 120 is selectively driven to correspond to the pupil positions of a plurality of viewers, and the left eye image and the right eye image for a plurality of viewers are sequentially displayed through the image panel 110 Output of the left eye or the right eye image through the first and second retardation films is prevented from being outputted through the image panel 110, thereby enabling a plurality of viewers to view stereoscopic images of better resolution .

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims should include all such modifications and changes as fall within the scope of the present invention.

100, 500: display, 200: camera,
300: control means,
110: a video panel, 120: a backlight panel,
130: beam splitter, 140: reflector,
510, 520: retardation film,
310: image driving unit, 320: backlight driving unit,
330: Data memory, 340: Control section.

Claims

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A display for outputting an image; a camera for capturing a plurality of viewers; and control means for controlling the plurality of viewers to simultaneously output stereoscopic images through the display,
The display device includes a video panel for transmitting linearly polarized light in a second direction and outputting a display image, a backlight panel arranged in a direction substantially orthogonal to the video panel at a rear lower side of the video panel, A first retardation film disposed on an upper surface of the backlight panel and converting linearly polarized light in a first direction into circularly polarized light in a first direction and outputting the converted circularly polarized light in a first direction and a flat plate shaped beam splitter disposed obliquely at an angle between the image panel and the backlight panel, A reflective plate disposed at a predetermined distance from the rear surface of the image panel to convert the circularly polarized light in the first direction into circularly polarized light in the second direction to reflect and output the circularly polarized light and a reflective plate disposed on the rear surface of the image panel, A second phase difference film for converting circularly polarized light in two directions into linearly polarized light in a second direction and providing the same to the image panel, Respectively,
Wherein the control means confirms the positions of the left and right eyes of a plurality of viewers using the image photographed by the camera, and simultaneously drives the backlight pixels corresponding to the plurality of left eye positions at the left eye image time, The controller controls the convergence of the left eye image to the left eye position of the viewer and simultaneously controls the driving of the backlight pixels corresponding to the plurality of right eye positions at the right eye image time so as to converge the right eye image to the right eye positions of the plurality of viewers through the image panel Dimensional stereoscopic image display device.

9. The method of claim 8,
Wherein the linearly polarized light in the first direction is linearly polarized light in the horizontal direction and the linearly polarized light in the second direction is linearly polarized light in the vertical direction.

10. The method according to claim 8 or 9,
Wherein the circularly polarized light in the first direction is a counterclockwise circularly polarized light and the circularly polarized light in the second direction is a clockwise circularly polarized light.

9. The method of claim 8,
Wherein the image panel is constituted by a TFT-LCD panel (Thin Film Transistor-Liquid Crystal Display panel) having an RGB (Red Green Blue) arrangement.

9. The method of claim 8,
Wherein the backlight panel is composed of a plurality of pixels provided with a light source,
Wherein the light source is a light emitting diode (LED), an organic light emitting diode (OLED), or a liquid crystal display (LCD).

9. The method of claim 8,
Wherein the backlight panel is constituted by an LCD (Liquid Crystal Display) panel.

9. The method of claim 8,
Wherein the image panel or the backlight panel comprises a panel having a driving speed of 120 Hz or more.

9. The method of claim 8,
Wherein the control means is configured to calculate the plane position coordinates of the left pupil and the right pupil of the viewer photographed from the camera.

9. The method of claim 8,
Wherein the reflection plate is a mirror.