KR101246687B1 - Apparatus for Optical Sheet and Method for Preparing the Optical Sheet Using the Apparatus - Google Patents

Abstract

Glasses-free three-dimensional display of the present invention is a liquid crystal panel; A lenticular lens formed on a rear surface of the liquid crystal panel; And a light emitting unit supplying light from the lower portion of the lenticular lens, wherein the light emitting unit is a white organic electroluminescent device (WOLED) light emitting layer. The autostereoscopic three-dimensional display of the present invention can significantly reduce resolution degradation and crosstalk phenomena at a large size with only a simple structure.

Description

Glasses-free three-dimensional display {Apparatus for Optical Sheet and Method for Preparing the Optical Sheet Using the Apparatus}

The present invention relates to an autostereoscopic three-dimensional display. More specifically, in the lenticular film-type 3D display of the lenticular film, the light source may be adjusted in pixel units to separate light into left and right eyes on the backlight unit, and to significantly reduce cross-talk at a large size. It relates to an autostereoscopic three-dimensional display that can be.

As technology advances, there is a demand for a video display device displaying more realistic images. Accordingly, in addition to development of a high resolution image display device having increased pixels for displaying an image, a 3D image display device capable of displaying an image in three dimensions has been developed. The 3D image display device can be applied not only to TV, but also applied to various fields such as medical images, games, advertisements, education, military, and the like, and thus a greater effect due to a stereoscopic effect can be expected.

The stereoscopic image display device displays two different images having visual differences in both eyes of a person, and a human can feel a stereoscopic feeling similar to when observing an object through the stereoscopic image display device. In other words, the stereoscopic image is based on the principle of stereo vision through two eyes of a person. The binocular parallax that appears because the eyes are about 65 mm apart is the most important factor of the stereoscopic sense. With this in mind, the three-dimensional effect can be easily expressed as long as it can input the same image to the two eyes. For example, the left image taken by the left camera is visible only to the left eye, and the right image taken by the right camera is reflected only to the right eye.

Conventional stereoscopic image display devices often use glasses specialized for stereoscopic images. For example, polarizing filters orthogonal to each other are disposed on two lenses of the glasses, and two images having polarization directions orthogonal to each other are observed through the glasses. Each lens of the glasses passes only light having the same polarization direction as the polarization filter of the lens. Therefore, only the image of the same polarization direction as that of the polarization filter among the two images is observed through one lens of the glasses. Similarly, an image of the polarization direction orthogonal thereto is observed through the other lens of the glasses. The images passing through both lenses are shown separately in both eyes. Therefore, a person wearing glasses specialized for stereoscopic images can observe different images through both eyes.

Recently, technologies for autostereoscopic 3D display devices which do not use glasses have been actively developed. In general, an autostereoscopic 3D display device is classified by using a parallax barrier or a lenticular lens.

Conventional lenticular lenses (RenticularLens) is a lenticular film is attached to the outside of the panel to display the image for the right eye and left eye on the liquid crystal panel and through the lenticular lens to form the image of the pixel in space. However, the conventional autostereoscopic 3D display has a disadvantage in that the assembly process is complicated, the resolution is reduced in half, the light utilization efficiency is lowered, and the problem of crosstalk in which the left eye image and the right eye image are mixed.

US7528893 proposes a structure in which the backlight itself is oriented so that the image is matched to the left / right at a specific viewing distance to make a 2D / 3D switchable glasses-free display. This patent solves the uniformity or has a prism structure having a variable angle of the lower surface of the light guide plate. However, in the case of the patent, the upper lenticular structure and the lower prism structure of the viewing area separation film should be arranged at specific intervals, and as the size increases, the manufacturing tolerance increases, which makes it difficult to align.

An object of the present invention is to provide an autostereoscopic three-dimensional display applying a lenticular film method having a simple structure without a complex optical structure.

Another object of the present invention is to provide an autostereoscopic three-dimensional display that can significantly reduce the resolution degradation and crosstalk phenomenon in a large size with a simple structure.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical subjects which are not mentioned can be understood by those skilled in the art from the following description.

Aspects of the invention relate to autostereoscopic three-dimensional displays. The glasses-free three-dimensional display is a liquid crystal panel; A lenticular lens formed on a rear surface of the liquid crystal panel; And a light emitting unit supplying light from the lower portion of the lenticular lens, wherein the light emitting unit is a white organic electroluminescent device (WOLED) light emitting layer.

In an embodiment, the pitch p of the lenticular lens may have a value of the following formula:

p = 2D × L1 / ( L2 + L3 )

In the above, D is the distance between the eyes, L1 is the upper glass thickness of the WOLED, L2 is the sum of the thickness of the lenticular lens and the thickness of the liquid crystal panel, L3 is the viewing distance.

The radius of curvature r of the lenticular lens may have a value of the following equation:

r = F ( n3 -One)

In the above, F = 1 / [(1 / L1) + (1 / (L3 + L2))], n3 is the refractive index of the lenticular lens portion, L1 is the upper glass thickness of the WOLED, L2 is the sum of the thickness of the lenticular lens and the thickness of the liquid crystal panel, and L3 is the viewing distance.

In the white OLED layer, a plurality of left eye segments wl and a plurality of right eye segments wr may be alternately arranged.

In embodiments, the WOLED emitting layer may have a unit segment width (w, wl + wr) having a value of the following formula:

w = 2D × p / (2D-p)

In the above, D is the distance between the eyes, p is the pitch of the lenticular lens

The left eye segment wl and the right eye segment wr may be arranged in pairs at a unit lenticular pitch. The left eye segment wl and the right eye segment wr may be formed at both ends of the unit lenticular pitch.

The segment width wl or wr in the left (right) side of the width w of the unit segment of the WOLED emitting layer may be 10% or more and less than 100% of p / 2 (p: lenticular pitch). . Preferably it may be 40 to 60%.

The left eye segment wl and the right eye segment wr may be alternately driven.

The lenticular lens may be a convex lenticular lens whose lens surface faces the light emitting unit, a concave lenticular lens whose lens surface faces the light emitting unit, or a lens in which they are alternately disposed.

The lenticular lens may include at least one of a planar lenticular lens and a double-sided lenticular lens.

The present invention has the effect of providing an autostereoscopic three-dimensional display that can significantly reduce the resolution degradation and crosstalk phenomena in a large size with a simple structure without complicated optical structure.

1 is a schematic cross-sectional view of an autostereoscopic 3D display according to an embodiment of the present invention.
2 is a diagram illustrating the pitch of the lenticular, the thickness of the upper glass of the WOLED, the thickness of the lenticular lens / LCD panel, and the viewing distance.
3 is a diagram illustrating the curvature radius of the lenticular lens, the thickness of the upper glass of the WOLED, the thickness and the viewing distance of the lenticular lens / LCD panel.
4 schematically illustrates a left / right viewing area in a unit lenticular lens.
FIG. 5 shows the WOLED light emitting layer emitted light profile (viewing area distribution) of Example 1. FIG.
FIG. 6 shows the WOLED light emitting layer emission light profile (viewing area distribution) of Example 2. FIG.
FIG. 7 shows the WOLED light emitting layer emission light profile (viewing area distribution) of Example 3. FIG.

1 is a schematic cross-sectional view of an autostereoscopic 3D display according to an embodiment of the present invention. As shown, the autostereoscopic three-dimensional display of the present invention includes a liquid crystal panel 10, a lenticular lens 20 formed on the rear of the liquid crystal panel and a light emitting unit 30 for supplying light from the lenticular lens. The light emitting unit is characterized in that the white organic electroluminescent device (WOLED) light emitting layer.

The liquid crystal panel 10 alternately displays a left eye image and a right eye image. In the liquid crystal panel 10, pixels are arranged in a matrix type, gate lines and data lines cross each other, and TFTs are formed at intersections of the gate lines and the data lines to form pixels. The configuration and driving of the liquid crystal panel 10 can be easily carried out by those skilled in the art.

The lenticular lens 20 is formed between the liquid crystal panel 10 and the light emitting unit 30.

As illustrated in FIG. 1, the lenticular lens may be a convex lenticular lens having a lens surface facing the opposite side of the light emitting unit, or may be a concave lenticular lens having a lens surface facing toward the light emitting unit. Alternatively, the lens may be a lens in which a convex lenticular lens and a concave lenticular lens are alternately disposed.

In addition, the lenticular lens may be a single-sided lenticular lens, as shown in FIG. 1, and a double-sided lenticular lens may be applied although not shown in the drawing.

The lenticular lens 20 has a semi-cylindrical lens extending in a direction perpendicular to the line connecting the viewer's eyes, and the left eye light is directed to the left eye and the right eye to the right eye. In the present invention, since the lenticular lens 20 is disposed on the rear surface of the liquid crystal panel 10 and uses all the pixels of the liquid crystal panel 10, high resolution images can be realized.

2 is a diagram illustrating the pitch p of the lenticular, the upper glass thickness L1 of the WOLED, the lenticular lens / LCD panel thickness L2, and the viewing distance L3.

In an embodiment, the pitch p of the lenticular lens 20 may have a value obtained by the following formula in the range of 0.1 to 1 mm:

p = 2D × L1 / ( L2 + L3 )

In the above, D is the distance between eyes, L1 is the upper glass thickness of the WOLED, L2 is the thickness of the lenticular lens 20 + thickness t3 of the liquid crystal panel 30, L3 is the viewing distance. The thickness of the lenticular lens 20 is the sum of the thickness of the lenticular lens portion and the thickness of the base film portion.

As described above, the pitch p of the lenticular becomes a factor related to the viewing area 2D, the WOLED upper glass thickness L1, the lenticular lens and the LCD panel thickness L2, and the viewing distance L3.

3 is a diagram illustrating a curvature radius r of a lenticular lens, an upper glass thickness L1 of a WOLED, a thickness of a lenticular lens / LCD panel L2, and a viewing distance L3.

In addition, the radius of curvature r of the lenticular lens may have a value according to the following formula in the range of 0.1 ~ 0.6mm.

r = F ( n3 -One)

In the above, F = 1 / [(1 / L1) + (1 / (L3 + L2))], n3 is the refractive index of the lenticular lens portion, L1 is the upper glass thickness of the WOLED, L2 is the thickness t3 of the lenticular lens 20 + the thickness t3 of the liquid crystal panel 30, and L3 is the viewing distance. The thickness of the lenticular lens 20 is the sum of the thickness of the lenticular lens portion and the thickness of the base film portion.

As described above, the radius of curvature r of the lenticular lens is related to the lens part refractive index n3, the WOLED upper glass thickness L1, the lenticular film and LCD panel thickness L2, and the viewing distance L3.

A light emitting unit 30 for supplying light is formed under the lenticular lens. In the present invention, a white organic electroluminescent device (WOLED) light emitting layer is used as the light emitting unit 30. By applying the white organic light emitting layer (WOLED) light emitting layer, the light source can be driven by the size of the liquid crystal panel pixel.

As illustrated in FIG. 1, a plurality of left eye segments wl and a plurality of right eye segments wr may be alternately arranged as shown in FIG. 1.

The left eye segment wl and the right eye segment wr may be arranged in pairs at a unit lenticular pitch p. Here, the unit lenticular pitch p is the distance between the valleys and the valleys or the distance between the vertices and the vertices of the lenticular lens. That is, the pair of left eye segments wl and the right eye segments wr are included in one lenticular pitch p.

In one embodiment, the left eye segment wl and the right eye segment wr may be formed throughout the unit lenticular pitch p, as shown in FIG. 1, and in another embodiment a portion of the unit lenticular pitch p. It can be formed only in the region. That is, the light emitting layer may not be formed in a portion of the unit lenticular pitch p. Preferably, as shown in FIG. 4, the left eye segment wl and the right eye segment wr may be formed at a valley portion at both ends of the unit lenticular pitch.

The left eye segment wl and the right eye segment wr are alternately driven, and the panel interworks with the white organic electroluminescent element WOLED to alternately spread the L / R image signal over the entire panel.

The width of the unit segment (w = wr + wl) may have a value according to the following equation.

w = 2D × p / (2D-p)

In the above, D is the distance between the eyes, p is the pitch of the lenticular lens

In one embodiment, when the distance between eyes is 65mm, the WOLED upper glass thickness (L1) is 0.8mm, and the lenticular lens / LCD panel thickness (L2) is 2.0mm, the lenticular pitch (p), unit according to the viewing distance The width of the segment may have the following values.

Viewing distance (L3)
(mm) Lenticular pitch (p)
(mm) Unit segment width (w)
(mm) 100 1.019608 1.027668 200 0.514851 0.516899 300 0.344371 0.345286 400 0.258706 0.259222 500 0.207171 0.207502 600 0.172757 0.172987 700 0.148148 0.148317 800 0.129676 0.129805

In addition, when the distance between the eyes is 65mm, the WOLED upper glass thickness (L1) is 0.8mm, and the lenticular lens / LCD panel thickness (L2) is 2.0mm, the parameter according to the viewing distance and the lens curvature radius (r) value May have the following values.

Viewing distance (L3)
(mm) Parameter (F)
(mm) Lens curvature radius (r)
(mm) 100 0.793774 0.412763 200 0.796844 0.414359 300 0.797886 0.414901 400 0.798411 0.415174 500 0.798727 0.415338 600 0.798938 0.415448 700 0.799089 0.415526 800 0.799203 0.415585

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

Example  One

On the lower end of the lenticular lens having a pitch (p) of 207.5 μm and a radius of curvature (r) of 415.3 μm, a WOLED light-emitting layer was formed of a left eye segment and the right eye segment at both ends within a unit pitch. The width of the unit segment (wr + wl) was 207.2 μm, the width of the left (right) segment in the unit segment (wl or wr) was 50% of p / 2 (p: lenticular pitch), and the viewing distance was set to 500 mm. . WOLED light emitting layer emission light profile (Gaussian distribution) is shown in FIG. As shown in FIG. 5, the viewing area was separated.

Example  2

The width (wl or wr) of the left (right) segment in the unit segment w was performed in the same manner as in Example 1 except that 100% of p / 2 (p: lenticular pitch) was used. The WOLED light emitting layer emission light profile (Gaussian distribution) is shown in FIG. 6.

Example  3

The width (wl or wr) of the left (right) segment in the unit segment w was performed in the same manner as in Example 1 except that 10% of p / 2 (p: lenticular pitch) was set. WOLED light emitting layer emission light profile (Gaussian distribution) is shown in FIG.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings and tables, the present invention is not limited to the above embodiments, but may be manufactured in various forms, and common knowledge in the art to which the present invention pertains. Those skilled in the art can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the embodiments described above are in all respects illustrative and not restrictive.

10 liquid crystal panel 20 lenticular lens
30: white organic electroluminescent element

Claims (12)

A liquid crystal panel;
A lenticular lens formed on a rear surface of the liquid crystal panel; And
It comprises a light emitting unit for supplying light from the lenticular lens, the light emitting unit is a white organic electroluminescent device (WOLED) light emitting layer,
An autostereoscopic three-dimensional display, characterized in that the pitch p of the lenticular lens has a value of the following equation:

p = 2D × L1 / (L2 + L3)
In the above, D is the distance between the eyes, L1 is the upper glass thickness of the WOLED, L2 is the sum of the thickness of the lenticular lens and the thickness of the liquid crystal panel, L3 is the viewing distance.
delete The autostereoscopic three-dimensional display according to claim 1, wherein the radius of curvature r of the lenticular lens has a value of the following equation:
r = F ( n3 -1)
In the above, F = 1 / [(1 / L1) + (1 / (L3 + L2))], n3 is the refractive index of the lenticular lens portion, L1 is the upper glass thickness of the WOLED, L2 is the sum of the thickness of the lenticular lens and the thickness of the liquid crystal panel, and L3 is the viewing distance.
The glasses-free three-dimensional display according to claim 1, wherein the white organic electroluminescent device (WOLED) light emitting layer has a plurality of left eye segments (wl) and a plurality of right eye segments (wr) arranged alternately with each other.
According to claim 4, wherein the white organic electroluminescent device (WOLED) light emitting layer is characterized in that the unit segment width (w, wl + wr) has a value of the formula:
w = 2D × p / (2D-p)
In the above, D is the distance between the eyes, p is the pitch of the lenticular lens.
5. An autostereoscopic three-dimensional display according to claim 4, wherein the left eye segment (wl) and the right eye segment (wr) are arranged in pairs in unit lenticular pitch.
The autostereoscopic three-dimensional display according to claim 6, wherein the left eye segment (wl) and the right eye segment (wr) are formed at both ends of a unit lenticular pitch.
The segment width wl or wr of the left (right) in the width w of the unit segment of the white organic light emitting diode (WOLED) light emitting layer is 10% of p / 2 (p: lenticular pitch). Glasses-free three-dimensional display, characterized in that less than 100%.
8. The segment width (wl or wr) of the left (right) side in the width w of the unit segment of the white organic light emitting diode (WOLED) light emitting layer is 40 to p / 2 (p: lenticular pitch). Glasses-free three-dimensional display, characterized in that 60%.
The autostereoscopic three-dimensional display according to claim 4, wherein the left eye segment wl and the right eye segment wr are alternately driven.
The lenticular lens according to claim 1, wherein the lenticular lens is a convex lenticular lens having a lens surface facing the opposite side of the light emitting unit, a concave lenticular lens having a lens surface facing the light emitting unit, or a lens in which they are alternately arranged. Dimensional display.
The autostereoscopic three-dimensional display of claim 1, wherein the lenticular lens comprises at least one of a single-sided lenticular lens and a double-sided lenticular lens.

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