KR101878327B1 - Image display device and method of fabricating the same - Google Patents

Abstract

The present invention relates to an image display apparatus and a method of manufacturing the same, and includes a display panel for outputting a plurality of viewpoint images, and an optical path changing means for changing paths of the plurality of viewpoint images, The unit width of the path changing unit and the arrangement of the plurality of the stereoscopic image units of the display panel are changed to reduce the thickness of the gap substrate for maintaining the back distance of the optical path changing unit.

Description

TECHNICAL FIELD [0001] The present invention relates to an image display apparatus and a method of manufacturing the same.

The present invention relates to an image display apparatus and a method of manufacturing the same, and more particularly, to an image display apparatus and a manufacturing method thereof that can reduce the size of a gap substrate by reducing a back distance by adjusting a lens pitch and a view arrangement will be.

As the information society has developed in recent years, the demand for the display field has been increasing in various forms, and image display devices capable of realizing not only two-dimensional plane images but also three-dimensional stereoscopic images have been developed in connection with the image realization method.

In addition to the binocular disparity due to the distance between the two eyes, there are psychological and memorizing factors for the depth and stereoscopic effect of the human image.

One of the three-dimensional stereoscopic image display methods using these factors is a stereoscopic type in which stereoscopic effect is felt using physiological factors of both eyes.

The stereoscopic type is the ability to generate the spatial information before and after the display surface in the process of fusion of the brain by providing the plane image of the plane including the parallax information in the left and right, That is, stereography is used.

Such a stereoscopic expression system is classified into a spectacle system in which a viewer wears special glasses depending on a substantial stereoscopic generation position and a non-stereoscopic vision system in which a lens array such as a parallax barrier or a lenticular on the display side is used, . ≪ / RTI >

Generally, the non-eyeglass system is superior to the eyeglass system in terms of 3D luminance.

The non-eyeglass image display apparatus includes a display panel for displaying the left eye image and the right eye image, respectively, and optical path changing means disposed at the upper portion or the lower portion of the display device. It is being actively developed.

Here, the optical path changing means may include a lens array such as a parallax barrier, a lenticular lens, or the like.

In particular, a lens array including a liquid crystal layer may be used. In this case, whether or not the liquid crystal layer functions as a lens can be determined depending on whether a voltage is applied or not.

Generally, a lens controls the path of incident light by using a difference in refractive index between air and the substance constituting the lens.

On the other hand, in the case of a liquid crystal lens, an imaginary lens is formed by an electric field formed by applying to each electrode, and the path of incident light incident from the display panel like the actual lens can be controlled by the phase difference of each position.

An image display apparatus including such a liquid crystal lens has an advantage that a two-dimensional (2D) mode and a three-dimensional (3D) mode can be selectively displayed.

Conventionally, a non-eyeglass image display apparatus has represented a left eye image and a right eye image at one view point.

In recent years, a multi-view image display device which requires a plurality of viewpoint images suitable for each viewing angle (direction) has emerged so that an image can be expressed in accordance with a viewing angle (direction).

Such a multi-view image display apparatus can implement images for a plurality of viewing regions according to viewing angles, which will be described below with reference to the drawings.

FIG. 1 is a view for explaining a plurality of viewing regions of a conventional image display apparatus, and FIG. 2 is a schematic view showing a cross section of a conventional image display apparatus. For convenience of explanation, the viewpoint image will be described by adding 'I'.

As shown in FIG. 1, the conventional image display apparatus 1 implements a plurality of view images I1 to I5 according to the viewing angle (direction).

At this time, the viewer can view the stereoscopic image as the second view image and the fourth view image are transmitted to the left eye and the right eye, respectively.

Here, the plurality of viewpoint images I1 to I5 may be images according to various viewing angles (directions).

By using the image display device 1 as described above, it is possible to view different images according to the viewing angles (directions) so that they can be expressed as actual images, and more natural stereoscopic images can be viewed.

As shown in FIG. 2, the conventional video display device may include a display panel 10, a light path changing means 20, and the like.

The display panel 10 includes a first substrate 12 and a second substrate 14 facing each other and a liquid crystal layer (not shown) formed between the first substrate 12 and the second substrate 14 .

Although not shown, a plurality of stereoscopic image units (not shown) may be defined on the display panel 10 to display a plurality of view images I1 to I5 corresponding to viewing angles (directions).

At this time, the plurality of stereoscopic image units may be, for example, a plurality of sub-pixel regions (not shown).

Although not shown, a pixel electrode and a common electrode may be formed on the inner surfaces of the first substrate 12 and the second substrate 14, respectively. A data voltage is applied to the pixel electrode and a common voltage is applied to the common electrode, .

A first polarizing plate 11 and a second polarizing plate 15, which selectively transmit only specific light, are attached to the outer surfaces of the first substrate 12 and the second substrate 14, respectively.

Then, the display panel 10 can be attached to the light path changing means 20 by using the first adhesive resin 17. [

The optical path changing means 20 includes a gap substrate 22 and a lens array 24.

The gap substrate 22 serves to maintain the back surface distance, and a material having a refractive index similar to that of the lens array 24 can be used.

For example, the gap substrate 22 may be glass and may be attached to the lens array 24 using a second adhesive resin 23.

The thickness of the gap substrate 22 may be L1.

The lens array 24 serves to change the image path of the plurality of view images I1 to I5 incident from the plurality of stereoscopic image units of the display panel 10 according to each viewing angle (direction).

3 is a diagram referred to explain viewing distance and back distance in a conventional video display device.

A certain back distance S is required between the display panel and the optical path changing means in order to arrange the view image at a desired position when using the non-eyeglass image display device.

That is, as shown in FIG. 3, in order for the viewer to view a plurality of viewpoint images according to the viewing angle (direction), the viewer must be separated from the video display device by the viewing distance D, It is necessary to be formed so as to be spaced apart by the rear distance S.

At this time, the viewing distance D corresponds to the distance between the video display device and the viewer, and the position spaced by the viewing distance D from the video display device may be a position where a plurality of view images are arranged.

The rear distance S is a distance required to arrange the view image at a desired position, and corresponds to a distance slightly shorter than the focal length of the ordinary lens.

A gap substrate having a refractive index similar to that of the lens array is formed between the display panel and the lens array in order to keep the back distance constant.

However, when the gap substrate is positioned between the display panel and the lens array, the total weight and the total thickness of the image display device are increased, resulting in an increase in manufacturing cost of the image display device.

The present invention has been made to solve the above problems and it is an object of the present invention to provide an image display device and a method of manufacturing the same that can reduce the size of a gap substrate by reducing a rear distance by adjusting a lens pitch and a view arrangement do.

According to an aspect of the present invention, there is provided an image display apparatus including: a display panel for outputting N viewpoint images (N is a natural number of 2 or more) according to a plurality of viewing directions; And an optical path changing unit for changing a path of the N view image, wherein the display panel is formed with a plurality of image groups consisting of N stereoscopic image units for implementing the N view image, A unit width of the optical path changing unit is formed to correspond to the image group.

Herein, the image group may be defined as a set of three-dimensional image units, a (1? A? N / 2, a is a natural number) (2? A? N- (a + b), where a is a natural number) and b stereoscopic image units (1? B? A, b are natural numbers).

In the case where N is 5, the image group includes a first stereoscopic image unit, a third stereoscopic image unit, and a fifth stereoscopic image unit that are repeatedly arranged along a first direction, and the third stereoscopic image unit, A second stereoscopic image unit and a fourth stereoscopic image unit respectively disposed under the image unit and the fifth stereoscopic image unit.

In the case where the optical path changing unit is a lens array, the long axis of the lens array may be formed so as to be inclined at a first angle with reference to a second axis (vertical axis).

In this case, the horizontal length of the plurality of view images may be (65 * K) mm.

In the case where the optical path changing portion is a barrier, the long axis of the barrier may be formed to be inclined at a first angle with reference to a second axis (vertical axis).

The optical path changing unit may further include a gap substrate for maintaining a back distance, which is a distance between the optical path changing unit and the display panel.

As described above, in the video display device and the manufacturing method thereof according to the present invention, the width of the lens and the arrangement of the stereoscopic image unit are adjusted in the non-spectacle-type video display device, .

As a result, it is possible to reduce the weight and thickness of the image display device and to reduce the manufacturing cost.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram referred to explain a plurality of viewing areas of a conventional video display device.
2 is a schematic cross-sectional view of a conventional video display device.
3 is a diagram referred to explain viewing distance and back distance in a conventional video display device.
4 is a view schematically showing an image display apparatus according to an embodiment of the present invention.
5 is a schematic cross-sectional view of an image display apparatus according to an embodiment of the present invention.
6A and 6B are views for explaining the arrangement of a lens array and a stereoscopic image unit in a conventional image display apparatus.
7A and 7B are views for explaining the arrangement of the lens array and the stereoscopic image unit in the image display apparatus according to the embodiment of the present invention.
FIG. 8 and FIG. 9 are views referred to for comparing magnitudes and magnitudes of a plurality of viewpoint images in the conventional and the image display apparatus of the present invention.
10 is a diagram referred to explain viewing distances and back distances in an image display apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For convenience of explanation, a liquid crystal display device will be described as an example of a video display device in the following description, but the present invention is not limited thereto and may be implemented as a flat panel display device such as an organic light emitting diode display device.

FIG. 4 is a view schematically showing an image display apparatus according to an embodiment of the present invention, and FIG. 5 is a view schematically showing a section of an image display apparatus according to an embodiment of the present invention. For convenience of explanation, the viewpoint image will be described by adding 'I'.

4 and 5, the image display apparatus according to the embodiment of the present invention may include a display panel 110, a light path changing unit 120, and the like.

The display panel 110 includes a first substrate 112 and a second substrate 114 facing each other and a liquid crystal layer (not shown) formed between the first substrate 112 and the second substrate 114 can do.

Although not shown, the display panel 110 may include a plurality of stereoscopic image units that display N view-point images according to various viewing angles (directions).

At this time, a minimum group of N stereoscopic image units for implementing N (N is a natural number of 2 or more) viewpoint images may be defined as a group of images.

This group of images may be defined as N-a odd-numbered three-dimensional image units arranged in the first column and a even-numbered three-dimensional image units arranged in the second column. (1? A? N / 2, a is a natural number)

In addition, a plurality of image groups including the N stereoscopic image units may be formed on the display panel 110.

At this time, the plurality of stereoscopic image units may be a plurality of subpixel regions (not shown) that display a plurality of viewpoint images according to the viewing angle (direction), and may display the left eye image or the right eye image, respectively.

For example, if the image display apparatus according to the embodiment of the present invention is a display apparatus capable of implementing five view image images (N = 5), a plurality of view image images are obtained from the first view image to the fifth view image I1- I5), and the plurality of stereoscopic image units may be the first to fifth stereoscopic image units (U1 to U5).

The image group may be composed of first to fifth stereoscopic image units, and may include three odd-numbered three-dimensional image units (U1, U3, U5) arranged in the first column and two odd- May be defined as image units U2 and U4.

The arrangement of the stereoscopic image units and the structure of the image group are not limited to those described above.

Although not shown, the first substrate 112 is provided with gate wirings (not shown) and data wirings (not shown) which cross each other to define sub-pixel regions (not shown) A transistor (not shown) may be formed.

A pixel electrode (not shown) may be formed on the first substrate 112 to be connected to the thin film transistor and disposed in each pixel region (not shown).

A plurality of red, green, and blue color filters (not shown) and a plurality of black matrices (not shown) are formed on the second substrate 114.

In such a display panel 110, an electric field is formed by the data voltage applied to the pixel electrode, and the arrangement of the liquid crystal molecules of the liquid crystal layer is changed to adjust the light transmittance, thereby realizing an image.

The first polarizer 111 and the second polarizer 115 selectively transmit only specific light to the outer surface of the first substrate 112 and the second substrate 114, respectively.

Then, the display panel 110 can be attached to the optical path changing means 120 that changes the path of the N view image images using the first adhesive resin 117. [

The optical path changing means 120 includes a gap substrate 122 and a lens array 124 which is a light path changing portion.

In this case, the optical path changing unit 120 may be a lens array such as a parallax barrier or a lenticular lens. Here, a lens array will be described as an example for convenience of explanation.

The gap substrate 122 serves to maintain the back distance, and a material having a refractive index similar to that of the lens array 24 can be used.

For example, the gap substrate 122 may be glass and may be attached to the lens array 124 using a second adhesive resin 123.

Here, the back distance is a distance required to arrange the view image at a desired position, which may be a distance slightly shorter than the focal length of the ordinary lens, and usually refers to a distance between the lens array and the display panel.

The lens array 124 changes a path of an image according to each viewing angle (direction) of a plurality of view images I1 to I5 incident from a plurality of stereoscopic image units of the display panel 110. [

Meanwhile, in the optical path changing means 120 according to the present invention, the curvature of each lens in the lens array 124 can be increased. (See FIG. 2A and FIG. 5B)

For example, in the optical path changing means 120 according to the present invention, the radius of curvature of each lens in the lens array 124 may be half the radius of curvature in the conventional lens array.

At this time, the curvature is a rate of change indicating the degree of bending of a curve or a curved surface. When the curvature is large, the rate of change of the curve is large, and when the curvature is small, the rate of change of the curve is small.

On the other hand, to change the curvature of the lens, the radius of curvature of the lens must be changed.

For example, in order to increase the curvature of the lens, the radius of curvature of the lens must be reduced, and in order to reduce the curvature of the lens, the radius of curvature of the lens must be increased.

That is, the curvature of the lens and the radius of curvature are in inverse proportion.

Therefore, in order to increase the curvature of each lens in the lens array 124 compared to the conventional optical path changing means 120 according to the present invention, the radius of curvature of the lens must be reduced.

However, when the curvature of the lens is increased, the size of the view image becomes larger at the same viewing distance.

This is because when the curvature of the lens is large, the focal length is shortened, and when the focal length is short, the magnification becomes large.

Here, the relationship between the curvature of the lens and the focal length will be described with reference to Equation (1).

[Equation 1]

Where a is the viewing distance, b is the back distance, f is the focal length of the lens, and r is the radius of curvature of the lens.

The optical path changing means 120 according to the present invention is formed such that the curvature of each lens in the lens array 124 is increased compared to the conventional one.

However, as described above, since the curvature of the lens and the radius of curvature are inversely proportional, the radius of curvature decreases when the curvature increases.

As the radius of curvature decreases, the focal length becomes shorter according to the equation.

That is, in the optical path changing means 120 according to the present invention, since the curvature of each lens in the lens array 124 is increased, the focal length of the lens is shortened.

On the other hand, the magnification means the ratio of the size of the object to the size of the image. As the focal length of the lens becomes shorter, the size of the image transmitted in each viewing area (viewing direction) can be larger than the size of the image formed in the lens. That is, the magnification becomes large.

Therefore, when the viewing distance is kept the same, when the curvature of the lens is increased, the size of the view image increases.

In the present invention, when the curvature of the lens increases, the back distance becomes shorter, and the thickness of the gap substrate 122 for maintaining the back distance can be reduced to L2. (L2 < L1)

However, when only the curvature of the lens is changed, not only the size of the viewpoint image but also the interval between the viewpoint images becomes large.

Thus, when the interval between the viewpoint images exceeds 65 mm, which is the interval between the right and left eyes, the viewer is hard to view the stereoscopic image.

Therefore, in order to realize the stereoscopic image, the optical path changing means 120 according to the present invention needs to further adjust not only the curvature of the lens but also the width of the lens and the arrangement of the stereoscopic image unit.

This will be described in detail in FIGS. 7A and 7B.

On the other hand, when the optical path changing unit is a barrier (not shown), the optical path changing unit 120 may be attached to the display panel 110 more closely to reduce the rear distance.

Referring again to FIG. 4, the display panel driver 130 may control the display panel driver 130 to display the image signals RGB, the vertical synchronization signal Vsync, the horizontal synchronization signal Hsync, the data enable signal DE, and the clock signal CLK And transmits the generated gate control signal and data signal to the display panel 110. The display panel 110 includes a display panel 110,

The display panel driver 130 may be mounted on a printed circuit board (PCB).

The system unit 150 outputs the video signal RGB, the vertical synchronization signal Vsync, the horizontal synchronization signal Hsync, the data enable signal DE, and the clock signal CLK to the display panel drive unit 130 For example, a TV system or a graphics card.

The image display apparatus according to the present invention realizes a stereoscopic image using the parallax of both eyes.

At this time, in order to realize stereoscopic images using the parallax of the binocular, the left eye image L and the right eye image R emitted from the display panel 110 need to be separated and transmitted to the left and right eyes of the viewer, respectively.

For example, a plurality of images output from the display panel 110 are changed by the optical path changing unit 120 so that the path of the image is changed to a left eye image and a right eye image.

In addition, a plurality of images output from the display panel 110 are changed by the optical path changing means 120 so that the image paths are separated into respective view images according to the viewing angle (direction).

In other words, the image display apparatus including the optical path changing means 120 separates a plurality of images output from the display panel 110 into a view image by changing the path of the image by the optical path changing means 120 And transmits the separated viewpoint images in different viewing areas (viewing directions).

Then, different viewpoint images are transmitted to the left and right eyes of the viewer, and the viewer can feel the three-dimensional feeling.

That is, in the image display apparatus according to the embodiment of the present invention, the stereoscopic image can be implemented by the optical path changing unit 120 without using the special glasses such as the polarizing glasses and the shutter glasses.

FIGS. 6A and 6B are views for explaining the arrangement of the lens array and the stereoscopic image unit in the conventional image display apparatus, and FIGS. 7A and 7B are views for explaining the arrangement of the lens array and the stereoscopic image unit in the image display apparatus according to the embodiment of the present invention, And stereoscopic image units. Here, the image display apparatus will be described by taking five viewpoint images as an example.

6A and 6B, each of the lenses 24a and 24b constituting the lens array 24 in the conventional optical path changing means is formed to correspond to the five stereoscopic image units U1 to U5 do.

At this time, it is preferable that the pitch of each lens is made to be slightly smaller than the five stereoscopic image units.

In the arrangement of the plurality of stereoscopic image units in the conventional display panel, the first stereoscopic image unit U1 to the fifth stereoscopic image unit U5 may be repeatedly arranged.

For example, the plurality of stereoscopic image units may include a first stereoscopic image unit (U1), a second stereoscopic image unit (U2), a third stereoscopic image unit (U3), a fourth stereoscopic image The unit U4, and the fifth stereoscopic image unit U5.

The plurality of stereoscopic image units may be arranged in the same direction along the second direction (vertical direction).

Here, the first to third stereoscopic image units U1 to U5 may be, for example, sub-pixel regions for displaying the first view image to the fifth view image, respectively.

As shown in FIG. 6B, the first view image to the fifth view image may be implemented with a viewing distance D from the display panel.

In this case, the horizontal length E of the first view image to the fifth view image may be, for example, 65 mm.

Here, the relationship between the viewing distance D and the rear distance S is expressed by the following equation (2).

&Quot; (2) &quot;

In this case, D is the viewing distance, S is the back distance, E is the binocular interval (horizontal length of the view image), and P is the width of the stereoscopic image unit.

On the other hand, in the image display apparatus according to the embodiment of the present invention, as shown in FIG. 7A, the lens array 124 in the optical path changing means according to the embodiment of the present invention includes two lenses 124a and 124b And may be formed to correspond to the five stereoscopic image units U1 to U5.

At this time, it is preferable that the pitch of each lens is made slightly smaller than 2.5 stereoscopic image units.

Here, the width of the lens may be a unit width of the optical path changing portion.

The long axis of the lens array 124, which is the optical path changing unit, is formed by being inclined by the first angle? With respect to the y-axis.

Similarly, even when the optical path changing portion is a barrier (not shown), it is preferable that the long axis of the barrier is formed to be inclined by the first angle? With respect to the y-axis.

When the optical path changing portion is a barrier (not shown), the unit width of the optical path changing portion may be the width of the slit (transmitting portion).

Here, in the arrangement of the plurality of stereoscopic image units in the display panel according to the embodiment of the present invention, the first to fifth stereoscopic image units U1 to U5 may be repeatedly arranged.

For example, the plurality of stereoscopic image units may include a first stereoscopic image unit U1, a third stereoscopic image unit U3, a fifth stereoscopic image unit U5, and a second stereoscopic image unit U3 along a first direction (horizontal direction) The unit U2, and the fourth stereoscopic image unit U4. (U1, U3, U5, U2, U4)

The plurality of stereoscopic image units are arranged in the lower part of the first stereoscopic image unit U1, the third stereoscopic image unit U3 and the fifth stereoscopic image unit U5 along the second direction (vertical direction) A second stereoscopic image unit U2, and a fourth stereoscopic image unit U4 may be disposed.

In addition, first stereoscopic image unit U1 and third stereoscopic image unit U3 may be disposed below second stereoscopic image unit U2 and fourth stereoscopic image unit U4, respectively.

Here, the first to third stereoscopic image units U1 to U5 may be, for example, sub-pixel regions for displaying the first view image to the fifth view image, respectively.

At this time, the first stereoscopic image unit U1, the third stereoscopic image unit U3 and the fifth stereoscopic image unit U5 arranged along the first direction (horizontal direction), the third stereoscopic image unit U3, The second and third stereoscopic image units U2 and U4 disposed under the fifth and the fifth stereoscopic image units U5 and U5 may be defined as one image group G. [

At this time, the image group G may be regarded as a minimum bundle of stereoscopic image units for implementing N view-point images according to various viewing angles (directions).

On the other hand, although not shown, in the image group, N- (a + b) pieces of stereoscopic image units are arranged in the first column, a number of the stereoscopic image units are arranged in the second column (2? A? N- ) and a is a natural number), and b stereoscopic image units in the third column may be arranged and defined. (1? B? A, b is a natural number)

For example, when N is 5, the image group includes two stereoscopic image units (U1, U4) arranged in the first column, two stereoscopic image units (U2, U5) arranged in the second column, Can be defined as one stereoscopic image unit (U3) arranged in three columns,

In more detail, a first stereoscopic image unit U1 and a fourth stereoscopic image unit U4 are arranged in a first direction (horizontal direction), and a fourth stereoscopic image unit And the fifth stereoscopic image unit U5 may be disposed adjacent to the second stereoscopic image unit U2 along the first direction (horizontal direction).

In the third column, a third stereoscopic image unit U3 may be disposed below the fifth stereoscopic image unit U5.

That is, two stereoscopic image units U1 and U4 arranged in the first column, two stereoscopic image units U2 and U5 arranged in the second column, and one stereoscopic image unit U3 arranged in the third column Can be defined,

In this case, the long axis of the lens array 124, which is the optical path changing unit, can be formed by being inclined by the second angle? With respect to the y-axis. (β> α)

It is preferable that the pitch of each lens is made slightly smaller than the two stereoscopic image units.

Here, the width of the lens may be a unit width of the optical path changing portion.

Likewise, even when the optical path changing portion is a barrier (not shown), it is preferable that the long axis of the barrier is formed to be inclined by the second angle? With respect to the y-axis.

When the optical path changing portion is a barrier (not shown), the unit width of the optical path changing portion may be the width of the slit (transmitting portion).

As shown in FIG. 7B, the first view image to the fifth view image may be implemented with a viewing distance D from the display panel.

In this case, the horizontal length E 'of the first view image to the fifth view image may be, for example, 130 mm, and each view image may be partially overlapped with the neighboring view image.

In this case, the horizontal length E 'of the viewpoint image is not limited to 130 mm, but is preferably (65 * K) mm, where K is, for example, 1/2, 1, 3/2, have. This depends on the arrangement of the stereoscopic image units.

Here, the relationship between the viewing distance D 'and the back distance S' according to the present invention will be described with reference to Equation (2).

The width P 'of the stereoscopic image unit in the image display apparatus according to the embodiment of the present invention is equal to the width P of the stereoscopic image unit of the conventional image display apparatus (P' = P)

Meanwhile, according to the present invention, as the curvature of each lens in the conventional lens array 124 is increased, the size of the view image increases at the same viewing distance.

As the size of the viewpoint image increases, the interval between the viewpoint images increases.

In this case, since the horizontal length of the view image is increased from 65 mm to 130 mm, the binocular interval E 'of the image display apparatus according to the embodiment of the present invention is twice the binocular interval E of the conventional image display apparatus have. (E '= 2E)

Substituting this into Equation 2, Equation 3 is obtained.

&Quot; (3) &quot;

Therefore, since the viewing distances in the conventional and the present invention are the same, the back distance S 'of the image display apparatus according to the present invention should be half the conventional back distance S. (S '= S / 2)

In other words, in the image display apparatus according to the present invention, the curvature of the lens of the lens array 124 can be increased to reduce the rear distance.

In addition, as the width of the lens of the lens array 124 is reduced, the interval between the relatively larger viewpoint images is narrowed so that the images are overlapped to control the stereoscopic image to be realized.

FIG. 8 and FIG. 9 are views referred to for comparing magnitudes and magnitudes of a plurality of viewpoint images in the conventional and the image display apparatus of the present invention.

As shown in FIG. 8, in the conventional image display apparatus, the interval between the plurality of view-point images is E / 2, and the intensity distribution of the image is spread by E.

In this case, E is a binocular interval, and the intensity distribution length of the image may correspond to the horizontal length of the view image.

On the other hand, as shown in FIG. 9, in the image display apparatus according to the present invention, the interval between multiple viewpoint images is E, and the intensity distribution of the image is spread by 2E.

That is, in the conventional image display apparatus, since the horizontal length of the view image is E (65 mm) and the interval between view images is 65/2 mm, neighboring view images can not be transmitted to the left and right eyes of the viewer.

On the other hand, in the video display device according to the present invention, since the horizontal length of the view image is 2E (130 mm) and the interval between view images becomes E (65 mm) by using the image overlap, The view image is transmitted.

At this time, the interval between the viewpoint images may vary depending on the degree of overlapping of images. The degree of overlapping of the viewpoints may vary depending on the arrangement of the stereoscopic image units in the image group, the unit width of the light path changing unit, and the inclination angle of the light path changing unit .

10 is a diagram referred to explain viewing distances and back distances in an image display apparatus according to an embodiment of the present invention.

10, in the video display device according to the embodiment of the present invention, the viewing distance between the viewer and the video display device is D, and the display panel is formed to be spaced from the lens array by the rear distance S '.

At this time, the position separated by the viewing distance D from the image display device may be a position where a plurality of view images are arranged.

The back distance S 'is a distance required to arrange the view image at a desired position, and is reduced to ½ of the conventional distance.

Therefore, in the video display apparatus according to the present invention, the width of the lens and the arrangement of the stereoscopic image unit in the non-spectacle-type image display apparatus can be adjusted to reduce the back distance, thereby reducing the size of the gap substrate.

As a result, it is possible to reduce the weight and thickness of the image display device and to reduce the manufacturing cost.

The embodiments of the present invention as described above are merely illustrative, and those skilled in the art can make modifications without departing from the gist of the present invention. Accordingly, the protection scope of the present invention includes modifications of the present invention within the scope of the appended claims and equivalents thereof.

110: display panel 112: first substrate
114: second substrate 120: optical path changing means
122: gap substrate 124: lens array

Claims (7)

A display panel for outputting N viewpoint images (N is a natural number of 2 or more) according to a plurality of viewing directions;
And a plurality of optical path changing units for changing paths of the N view image images,
A plurality of image groups including N stereoscopic image units for realizing the N view image are formed on the display panel,
N is limited to 5, and
Wherein a width of each of the plurality of optical path changing units is equal to or less than a width of the three dimensional image units.

The method according to claim 1,
The image group is defined as a set of three (3) stereoscopic image units and a (1 + a + N / 2, a is a natural number) stereoscopic image units, (A + b), a is a natural number), and b stereoscopic image units (1? B? A, b are natural numbers).

3. The method of claim 2,
The image group includes a first stereoscopic image unit, a third stereoscopic image unit, and a fifth stereoscopic image unit, which are repeatedly arranged along a first direction, and a second stereoscopic image unit, And a second stereoscopic image unit and a fourth stereoscopic image unit, respectively, which are respectively arranged in the first stereoscopic image unit and the second stereoscopic image unit.
The method according to claim 1,
Wherein when the optical path changing unit is a lens array, a long axis of the lens array is inclined at a first angle with respect to a second axis (vertical axis).
5. The method of claim 4,
Wherein the horizontal length of the plurality of viewpoint images is (65 * K) mm, and K is one of 1/2, 1, 3/2, and 2.
The method according to claim 1,
Wherein when the optical path changing portion is a barrier, a long axis of the barrier is inclined at a first angle with respect to a second axis (vertical axis).
The method according to claim 1,
Wherein the optical path changing means further comprises a gap substrate for maintaining a back distance that is a distance between the optical path changing unit and the display panel.

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