KR20140082512A - Stereoscopic image display device - Google Patents

Stereoscopic image display device Download PDF

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KR20140082512A
KR20140082512A KR1020120152587A KR20120152587A KR20140082512A KR 20140082512 A KR20140082512 A KR 20140082512A KR 1020120152587 A KR1020120152587 A KR 1020120152587A KR 20120152587 A KR20120152587 A KR 20120152587A KR 20140082512 A KR20140082512 A KR 20140082512A
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view
display panel
lenticular lens
stereoscopic image
images
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KR1020120152587A
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Korean (ko)
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KR102039361B1 (en
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장진혁
이용구
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엘지디스플레이 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/398—Synchronisation thereof; Control thereof

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  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

A stereoscopic image display device capable of reducing the rear distances includes a display panel which displays multiple images and a view generation unit which is arranged on the display panel and generates multiple views corresponding to the images, respectively. The horizontal length of each view is longer than the distance between person′s right and left eyes.

Description

[0001] STEREOSCOPIC IMAGE DISPLAY DEVICE [0002]

The present invention relates to a stereoscopic image display apparatus, and more particularly, to a stereoscopic image display apparatus capable of reducing a back side distance.

The stereoscopic (or 3D) image display device is a device that enables a viewer to view a stereoscopic image by binocular parallax between the left and right eyes by providing different images to the left and right eyes of a viewer.

In recent years, studies have been actively conducted on the non-eyeglass system in which stereoscopic glasses are not worn. In the non-eyeglass system, there is a lenticular system for separating the left eye and right eye images using a cylindrical lens array, and a barrier system for separating the left eye and the right eye image using a barrier.

1 is a schematic view illustrating a conventional barrier type stereoscopic image display apparatus.

1, a conventional barrier type stereoscopic image display apparatus includes a display panel 110 for displaying the left eye image L and the right eye image R in a separated manner, and a display panel 110 disposed on the front surface of the display panel 110, And a barrier panel 120 for alternately forming the region 122 and the blocking region 124. [

The viewer 140 views an image displayed on the display panel 110 through the light transmitting region 122 of the barrier panel 120. The left and right eyes of the viewer 140 are allowed to transmit the same light transmitting region 122 The user can see another area of the display panel 110 through the display area. Accordingly, the viewer 130 views the left-eye image L and the right-eye image R, which are displayed adjacently through the light-transmitting region 122, to feel the three-dimensional effect.

2 is a schematic view illustrating a typical lenticular type stereoscopic image display apparatus.

2, a typical lenticular stereoscopic image display apparatus includes a display panel 110 for displaying a left eye image L and a right eye image R in a separated manner, and a display panel 110 disposed on the front surface of the display panel 110, And a lenticular lens array 130 including a lens.

The viewer 140 views an image displayed on the display panel 110 through the lenticular lens array 130. The left and right eyes of the viewer 140 see different areas of the display panel 110 through the lenticular lens do.

Specifically, the lenticular lens array 130 refracts the left eye image L provided from the display panel 110 and provides the left eye image L to the left eye of the viewer 140, refracts the right eye image R, So that the viewer 140 can view the stereoscopic image.

Both of the barrier system and the lenticular lens type stereoscopic image display apparatuses described above are provided with the display panel 110 and the barrier panel 120 or the lenticular lens 120 in order to separate the left eye image L and the right eye image R and provide them to the viewer 140. [ The rear distance S between the lens arrays 130 must be secured to a predetermined distance or more.

 At this time, in the stereoscopic image display device, since the thickness and weight of the product may increase according to the rear distance S, it is necessary to minimize the rear distance S.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stereoscopic image display device capable of minimizing a back distance between a display panel and a barrier panel (120) or a lenticular lens array (130).

Other features and advantages of the invention will be set forth in the description which follows, or may be obvious to those skilled in the art from the description and the claims. In addition, other features and advantages of the present invention may be newly understood through embodiments of the present invention.

According to an aspect of the present invention, there is provided a stereoscopic image display apparatus including: a display panel for displaying a plurality of images; And a view generator arranged on the display panel to generate a plurality of views corresponding to the plurality of images. And a horizontal length of the plurality of views is larger than a binocular interval of a person.

According to another aspect of the present invention, there is provided a stereoscopic image display apparatus including: a display panel having a plurality of subpixels formed thereon and displaying a plurality of images on the plurality of subpixels; And a view generator that includes a lenticular lens and that is disposed on the display panel and generates a plurality of views corresponding to each of the plurality of images. The focal length of the lenticular lens is

Figure pat00001
Smaller, the S denotes a distance between the display panel and the view generation unit, wherein E denotes a binocular interval, the P s is characterized in that indicating the size of the sub-pixels.

According to the present invention, the horizontal distance between the display panel and the barrier panel 120 or the lenticular lens array 130 can be minimized by forming the horizontal length of the view larger than the binocular interval.

Further, the present invention has another effect that the thickness and weight of the product can be reduced as the back distance decreases.

In addition, the present invention has another effect that the viewer can view the stereoscopic image at the same viewing distance as the conventional one by adjusting the view arrangement on the display panel while reducing the back distance between the display panel and the barrier panel or the lenticular lens array.

1 is a schematic view for explaining a general barrier type stereoscopic image display apparatus.
2 is a schematic view for explaining a typical lenticular lens type stereoscopic image display apparatus.
3 is a schematic view of a conventional stereoscopic image display apparatus.
4 is a view for explaining a view arrangement arranged on a conventional display panel.
5 is a view schematically showing a stereoscopic image display apparatus according to an embodiment of the present invention.
6 is a view for explaining a plurality of image arrangements arranged on a display panel according to an embodiment of the present invention.
7 is a view for explaining the arrangement of the lenticular lens.
8 is a view for explaining an example in which the pitch of the lenticular lens is changed.

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

Hereinafter, a stereoscopic image display apparatus according to an embodiment of the present invention will be described as a lenticular lens system for convenience of description. However, the present invention is not limited to a stereoscopic image display apparatus using a lenticular lens system, and can be applied to all stereoscopic image display apparatuses having a non-barrier system as well as a barrier system stereoscopic image display apparatus.

FIG. 3 is a schematic view of a conventional stereoscopic image display apparatus, and FIG. 4 is a view for explaining a view arrangement arranged on a conventional display panel.

Referring to FIG. 3, the conventional stereoscopic image display apparatus includes a display panel 210, a gap forming unit 220, and a view generating unit 230.

In the display panel 210, a plurality of pixels each displaying a plurality of images are sequentially and repeatedly arranged.

The gap forming unit 220 is disposed between the display panel 210 and the view generating unit 230 to maintain a distance between the display panel 210 and the view generating unit 230. The gap forming unit 220 may be made of a transparent glass material so that the image light incident from the display panel 210 can be transmitted.

The view generating unit 230 generates a plurality of views corresponding to a plurality of images, and is disposed on the display panel 210 at a predetermined distance. At this time, the rear clearance distance (S 1) referred to, and a rear distance between the view generation unit 230 and the display panel (210) (S 1) is supported by the gap-forming portion (220).

The view generating unit 230 includes a plurality of lenses 232 and generates a plurality of views by passing a plurality of images provided from the display panel 210 through the plurality of lenses 232.

At this time, one lens 232 may be arranged so as to correspond to a plurality of images displayed on the display panel 210. For example, as shown in FIG. 4, when four images (1,2,3,4) are sequentially displayed on the display panel 210, one lens 232 is displayed on the display panel 210 (1, 2, 3, 4). At this time, the pitch (P, P) of the lens 232 is formed to be slightly smaller than the four pixel sizes of the display panel 210.

Meanwhile, the plurality of views are generally formed so that the horizontal length VD 1 and the interval (VI 1 ) between the views are the same as the binocular interval E of the viewer 240, Provide different images.

The present invention aims to reduce the thickness and the weight of the stereoscopic image display device by reducing the back distance S 1 between the view generating unit 230 and the display panel 210 as described above.

Accordingly, the stereoscopic image display apparatus according to the present invention reduces at least one of a radius of curvature of a lens, a pitch of a lens, and a view arrangement, thereby reducing a rear distance.

Hereinafter, a stereoscopic image display apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 5 to 9, in comparison with a conventional stereoscopic image display apparatus.

5 is a schematic view illustrating a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the stereoscopic image display apparatus according to an exemplary embodiment of the present invention includes a display panel 310, a gap forming unit 320, and a view generating unit 330.

First, the display panel 310 separates and displays a plurality of images. As the display panel 210, a liquid crystal display (LCD), an organic light emitting diode display (OLED), a field emission display (FED), a liquid crystal display A flat panel display device such as a plasma display panel (PDP) or an electroluminescent display (EL) may be used.

The display panel 310 includes a plurality of pixels whose regions are divided by gate lines and data lines that intersect with each other.

A plurality of pixels constituting the display panel 310 are arranged in a matrix form including a row and a column, and each pixel includes red, green, and blue subpixels for displaying a color.

A thin film transistor having a gate electrode, an active layer, a source electrode, and a drain electrode is disposed at an intersection of the gate line and the data line. Each pixel is filled with a liquid crystal material that is equivalent to a liquid crystal cell, and a storage capacitor for maintaining a constant voltage charged in the liquid crystal cell is formed.

The display panel 310 displays an image on each pixel according to a scan signal sequentially supplied to the gate line and an image signal supplied through the data line.

The thin film transistor provided for each pixel is turned on when a scan signal is supplied from the gate line to charge the liquid crystal cell with the image signal received through the data line. The image signal charged in the liquid crystal cell of each pixel is held for one frame period by the storage capacitor.

On the other hand, the display panel 310 displays a plurality of images corresponding to one pixel or only one sub-pixel (R, G, B) of one pixel. The arrangement of a plurality of images displayed on the display panel 310 according to an embodiment of the present invention will be described later with reference to FIG. 6 and FIG.

Next, the gap forming unit 320 is formed between the display panel 310 and the view generating unit 330 to maintain the backward distance S 2 between the display panel 310 and the view generating unit 330. The gap forming part 320 is formed of a transparent glass material so that the image light provided from the display panel 310 can be transmitted.

The thickness of the gap forming portion 320 is determined by the focal length of the view generating portion 330. Accordingly, if the focal length of the view generating unit 330 can be reduced, the thickness of the gap forming unit 320 can be reduced, thereby reducing the overall thickness of the stereoscopic image display apparatus . Further, because the gap forming portion 320 is generally formed of glass, the weight reduction effect is also greater as the thickness is reduced.

Next, the view generating unit 330 is disposed on the display panel 210, and generates a plurality of views corresponding to the plurality of images displayed on the display panel 310. The view generation unit 330 may be implemented as one of a parallax barrier, a lenticular lens array, and a liquid crystal field lens array.

Hereinafter, it is assumed that the view generating unit 330 is implemented as a lenticular lens array.

The view generating unit 330 includes a plurality of lenticular lenses 332. The view generating unit 330 according to an embodiment of the present invention increases the magnification of the lenticular lens 332 by forming the radius of curvature of the lenticular lens 332 smaller than the radius of curvature of the conventional lenticular lens 232, The focal length can be reduced.

This fact can be found from the following equation (1).

Figure pat00002

Here, a represents the proper viewing distance, b represents the distance between the lenticular lens 332 and the display panel 310, and f represents the focal length of the lenticular lens 332.

And, the magnification is determined by Equation (2).

Figure pat00003

Here, m represents a magnification. (1) and (2) can be summarized as follows. &Quot; (3) "

Figure pat00004

That is, the focal length of the lenticular lens 332 is inversely proportional to the magnification m through Equation (3).

In the stereoscopic image display device, the magnification m is (the horizontal length of the view) / (the subpixel size), and the general stereoscopic image display device is designed so that the horizontal length of the view is formed by the binocular interval, Can be summarized by the following equation (4).

Figure pat00005

Here, E denotes a binocular interval, P s represents a size of sub-pixels.

The stereoscopic image display apparatus according to the present invention is characterized in that the lenticular lens 332 is designed so as to have a focal distance satisfying the following expression (5).

Figure pat00006

The stereoscopic image display device according to the present invention is designed so that the horizontal length of the view is formed larger than the binocular interval. Accordingly, the stereoscopic image display apparatus according to an embodiment of the present invention is larger than the E / P s design the scale of the lenticular lens 332, in order to reduce the focal length of the lenticular lens 332.

By reducing the focal length of the lenticular lens 332 as described above, the stereoscopic image display apparatus according to an embodiment of the present invention reduces the back distance S 2 between the display panel 310 and the view generating unit 330 .

Generally, the stereoscopic image display device provides the viewer 340 with an image displayed on the display panel 310 by forming the focal point of the lenticular lens 332 on the display panel 310. Accordingly, the back distance S 2 between the display panel 310 and the view generating unit 330 can be made equal to the focal length of the lenticular lens 332.

However, if only the focal distance of the lenticular lens 332 and the back distance S 2 between the display panel 310 and the view generating unit 330 are reduced as described above, There is a problem that the horizontal length VD 2 and the interval VI 2 between views increase, which is greater than the binocular interval E.

If so the view distance (VI 2) is to be greater than both eyes distance (E), because this image is not provided properly to at least one of the left and right eyes of the viewer 340, it is not the viewer 340 can view a stereoscopic image.

Accordingly, the image arrangement displayed on the display panel 310 needs to be corrected.

FIG. 6 is a view for explaining a plurality of image arrangements arranged on a display panel according to an embodiment of the present invention, and FIG. 7 is a view for explaining the arrangement of a lenticular lens.

6 and 7 assume that the back distance between the display panel and the view generating unit in the stereoscopic image display apparatus shown in FIG. 4 is reduced by half. That is, the rear distance S 2 shown in FIG. 6 corresponds to 1/2 of the rear distance S 1 shown in FIG.

As described above, if the back distance is reduced to 1/2, the view interval becomes 2 times, that is, 2E, as compared with Fig.

In the present invention, a plurality of images are not arranged in a row in order to make the view interval equal to the binocular interval E as shown in FIG. Referring to FIG. 6, it is assumed that the display panel 310 displays four images in units of subpixels.

The display panel 310 includes a first subpixel 1 for displaying a first image and a third subpixel 3 for displaying a third image in a row, Two subpixels 2 and a fourth subpixel 4 displaying a fourth image are arranged in a row. At this time, the display panel 310 causes the second subpixel 2 to be disposed in the oblique direction of the first subpixel 1.

7, the lenticular lens 332 disposed on the display panel 310 has a pitch P 2 corresponding to four sub-pixels, and the lenticular lens 332 has a pitch P 2 corresponding to the sub- And extend in diagonal directions.

Meanwhile, the view generating unit 330 generates the first through fourth views corresponding to the first through fourth images (1,2,3,4) displayed on the display panel 310 at horizontal positions relative to each other, , The view interval VI 2 becomes the binocular interval E and the horizontal length VD 2 of the view is twice the binocular interval E.

Referring again to FIG. 5, a plurality of images are sequentially arranged in a row on two or more rows in the display panel 310 as shown in FIGS. 6 and 7, and a lenticular lens 332 By extending in the oblique direction of the subpixel, a plurality of views can be formed with the same interval (VI 2 ) as the binocular interval E.

However, the horizontal length (VD 2 ) of the plurality of views is still greater than the binocular interval E. Accordingly, a plurality of views overlap at least a part with an adjacent view.

In the embodiment described above, the rear distance (S 2 ) of the stereoscopic image display device is reduced by increasing the radius of curvature of the lenticular lens 332. [ Furthermore, the stereoscopic image display apparatus can further reduce the rear distance S 2 by reducing the pitch P of the lenticular lens 332.

The backside distance S can be expressed by Equation (6).

Figure pat00007

Here, S represents the back surface distance, P represents the pitch of the lenticular lens 332, D represents the proper viewing distance, and VD represents the horizontal length of the view.

Assuming that the proper viewing distance D in Equation 4 is a fixed value, the back distance S may be determined by the pitch P of the lenticular lens 332 and the horizontal length VD of the view.

In the above-described embodiment, it has been described that the rear distance S decreases as the horizontal length VD of the view is increased. The stereoscopic image display apparatus according to an embodiment of the present invention increases the radius of curvature of the lenticular lens 332 and doubles the magnification.

If the magnification is doubled, the focal length of the lenticular lens 332 is halved, so that the horizontal length VD of the view is doubled. At this time, the backward distance S can be reduced to 1/2 as the horizontal length VD of the view is doubled when Equation (6) is used.

In another embodiment, the rear distance S can be reduced by changing not only the horizontal length VD of the view but also the pitch P of the lenticular lens 332. [

8 is a cross-sectional view for explaining an example of changing the pitch of the lenticular lens.

Referring to FIG. 8, it is assumed that the display panel 310 displays four images in units of subpixels.

The display panel 310 includes a first subpixel 1 for displaying a first image and a third subpixel 3 for displaying a third image in a row, Two subpixels 2 and a fourth subpixel 4 displaying a fourth image are arranged in a row. At this time, the display panel 310 causes the second subpixel 2 to be disposed in the oblique direction of the first subpixel 1.

The lenticular lens 332 disposed on the display panel 310 is formed to extend in the oblique direction of the subpixel of the display panel 310.

Meanwhile, the view generating unit 330 generates the first through fourth views corresponding to the first through fourth images (1,2,3,4) displayed on the display panel 310 at horizontal positions relative to each other, , The view interval VI becomes the binocular interval E, and the horizontal length VD of the view becomes twice the binocular interval E.

On the other hand, the lenticular lens 332 included in the view generating unit 330 has a pitch P 3 corresponding to two sub pixels, unlike in FIG. That is, the pitch P 3 of the lenticular lens 332 shown in FIG. 8 corresponds to 1/2 of the pitch of the lenticular lens 332 shown in FIG.

According to Equation (6), it can be seen that the rear distance S 3 shown in FIG. 8 is one half of the rear distance S 2 shown in FIG. Further, it can be seen that it is 1/4 of the rear distance S 1 shown in FIG.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

210, 310: display panel 220, 320: gap forming part
230, 330: view generation unit S: rear distance
P: Pitch of lenticular lens VD: Horizontal length of view
VI: View distance D: Optimum viewing distance

Claims (10)

A display panel for displaying a plurality of images; And
And a view generation unit that is disposed on the display panel and generates a plurality of views corresponding to each of the plurality of images,
Wherein a horizontal length of each view is larger than a binocular interval of a person. The apparatus according to claim 1,
A parallax barrier, a lenticular lens array, and a liquid crystal field lens array. The method according to claim 1,
Wherein the plurality of views are generated in a horizontal position with respect to each other. The method according to claim 1,
And the interval between the plurality of views is equal to the binocular interval. The method according to claim 1,
Wherein each view overlaps at least a part with an adjacent view. The method according to claim 1,
And a gap forming unit formed between the display panel and the view generating unit. A display panel on which a plurality of subpixels are formed and displays a plurality of images on the plurality of subpixels; And
And a view generation unit that includes a lenticular lens and is disposed on the display panel and generates a plurality of views corresponding to each of the plurality of images,
The focal length of the lenticular lens is
Figure pat00008
Smaller, S is a stereoscopic image display device, characterized in that indicating the size of the denotes a distance between the display panel and the view generation unit, wherein E denotes a binocular interval, the P s is the sub-pixel. 8. The method of claim 7,
Wherein a horizontal length of each view is larger than a binocular interval of a person. 8. The method of claim 7,
Wherein each view overlaps at least a part with an adjacent view. 8. The method of claim 7,
And the lenticular lens is formed to extend in an oblique direction of the subpixel.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006287592A (en) * 2005-03-31 2006-10-19 Namco Bandai Games Inc Image generating device, electronic equipment, and image generation method and program
KR20080082111A (en) * 2007-03-07 2008-09-11 엘지디스플레이 주식회사 Optical sheet for three-dimensional image and three-dimensional image display device using the same
KR20080093789A (en) * 2007-04-18 2008-10-22 엘지마이크론 주식회사 Optical sheet for generating stereo scopic images
JP2011164637A (en) * 2003-11-06 2011-08-25 Nec Lcd Technologies Ltd Three-dimensional image display device and display panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011164637A (en) * 2003-11-06 2011-08-25 Nec Lcd Technologies Ltd Three-dimensional image display device and display panel
JP2006287592A (en) * 2005-03-31 2006-10-19 Namco Bandai Games Inc Image generating device, electronic equipment, and image generation method and program
KR20080082111A (en) * 2007-03-07 2008-09-11 엘지디스플레이 주식회사 Optical sheet for three-dimensional image and three-dimensional image display device using the same
KR20080093789A (en) * 2007-04-18 2008-10-22 엘지마이크론 주식회사 Optical sheet for generating stereo scopic images

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