KR20160063246A - Volumetric three dimensional display apparatus using electrowetting liquid lens array - Google Patents

Abstract

Disclosed is a volumetric three-dimensional display apparatus using a liquid wetting lens array. In the volumetric three-dimensional display apparatus, a panel outputs light for displaying an image through a plurality of pixels. A collimation module includes the same number of lens groups with the pixels, and outputs the light outputted by the panel as parallel collimation light. The liquid wetting lens array includes the same number of liquid wetting lenses with the pixels, and varies a focal distance of the collimation light outputted by the collimation module.

Description

≪ Desc / Clms Page number 1 > VOLUMETRIC THREE DIMENSIONAL DISPLAY APPARATUS USING ELECTROWETTING LIQUID LENS ARRAY < RTI ID = 0.0 >

The present invention relates to a volumetric three-dimensional display device using a liquid wet lens array.

A three-dimensional (3D) display device is generally constructed in such a manner that images with different image information are input in both eyes, thereby recognizing a virtual depth feeling by sensing a visual difference (parallax).

Currently, the 3D display device includes polarizing glasses, shutter glasses and non-glasses glasses for wearing and viewing special glasses. In the non-glasses, there are a parallax barrier, a lenticular lens, an integrated image, There is a hologram.

The parallax barrier system, the lenticular lens system, and the integrated video system are mainly used in the non-eyeglass system which does not use glasses, but the inconsistency of the binocular adjustment and the congestion causes inconvenience in long-time viewing. In addition, there is a disadvantage in that the continuity of the three-dimensional sensation according to the motion of the viewer is deteriorated by providing the divided viewpoint information.

Although the hologram method is close to an ideal 3D display device, it is difficult to miniaturize the system realistically, and it is difficult to provide a real-time image because of a large amount of data.

On the other hand, the volumetric image method allows a user to feel the same stereoscopic feeling as the reality by inputting a light source similar to the actual one in both eyes, and the visual fatigue can be eliminated even for a long time by matching the control and the runaway.

However, the volumetric image system is mainly formed by the rotation of a motor with a light source or the integration of a light source using a mirror rotation, and by using the afterimage effect of the eyeball to provide a stereoscopic effect, it is difficult to miniaturize the system.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a volumetric three-dimensional display device using a liquid wetted lens array capable of greatly reducing size and providing real-time volumetric images using an individually controllable liquid wetted lens array.

According to an aspect of the present invention, there is provided a volumetric three-

A panel for outputting light for displaying an image through a plurality of pixels; A collimating module including the same number of lens groups as the plurality of pixels and outputting light output from the panel as collimated light; And a liquid wetting lens of the same number as the plurality of pixels, wherein the liquid wetting lens is a lens that changes focus by controlling the contact angle of two liquids using electrowetting, wherein the focus of the collimated light output from the collimating module And a liquid wet lens array that varies the distance.

Here, the panel may include a backlight unit, a polarizing plate, and a color filter, and each pixel outputs white light, which is a non-coherent light source including R (Red), G (Green), and B .

The lens unit of the collimation module may be composed of lenses within one lens, and outputs incoherent light output from each pixel of the panel as coherent light.

The number and the width of the liquid wetting lenses in the liquid wetting lens array correspond to the number and width of the lens groups in the collimating module.

According to another aspect of the present invention, there is provided a volumetric three-

A collimation module for outputting light output from the point light source as collimated light in the form of parallel light; A transparent display configured by a plurality of pixels including a liquid crystal and a color filter, and controlling an area of collimated light output from the collimating module by controlling the plurality of pixels; And a liquid-wetting lens of the same number as the plurality of pixels, wherein the liquid-wetting lens is a lens that changes focus by controlling the contact angle of the two liquids using electrowetting, wherein the focal distance Lt; RTI ID = 0.0 > a < / RTI > liquid wet lens array.

A first polarizer for polarizing light output from the collimating module and outputting the polarized light to the transparent display; And a second polarizing plate for polarizing the light output from the liquid wetting lens array and outputting the polarized light to an external space.

Further, the transparent display may be configured to perform ON / OFF control for the plurality of pixels so that each of the plurality of pixels respectively performs passage or blocking of collimated light output from the collimation module.

Also, the collimation module is formed of one lens group, and the lens group is formed to have a large opening width of the size of the volume type three-dimensional display device.

In addition, the arrangement number and the aperture width of the liquid wetting lens in the liquid wetting lens array correspond to the array number and the width of the pixels in the transparent display.

The liquid wetting lens may include an electrode, a dielectric layer, and a hydrophobic film. The liquid wetting lens may be formed by injecting a hydrophobic liquid and a hydrophilic liquid into holes of the liquid wetting lens, So that the focal distance is formed.

In addition, the liquid wetting lens array may color the remaining region excluding the liquid wetting lens portion to black so as to prevent unnecessary invasion of the light source.

According to the present invention, a three-dimensional image can be realized without using special glasses by forming a pixel in a space using a liquid wet lens array and implementing a three-dimensional image through a volumetric image method.

In addition, by driving a liquid wetting lens, existing volumetric three-dimensional display devices can be integrated, and a real-time three-dimensional image can be realized with a small amount of data of the panel.

1 is an exploded perspective view of a volumetric three-dimensional display device according to a first embodiment of the present invention.
2 is a side cross-sectional view of the volumetric three-dimensional display device shown in Fig.
FIG. 3 is a diagram illustrating a method of collimating the light of a unit pixel by the collimation module shown in FIG. 1. FIG.
4 is a view illustrating a driving principle of a volumetric three-dimensional display device according to a first embodiment of the present invention
5 is an exploded perspective view of a volumetric three-dimensional display device according to a second embodiment of the present invention.
6 is a side cross-sectional view of the volumetric three-dimensional display device shown in Fig.
7 is a view showing a method of collimating the light of the point light source shown in FIG.
FIG. 8 is a diagram illustrating a method of implementing an image through the transparent display shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

Hereinafter, a volume type three-dimensional display device using a liquid wet lens array according to a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a volumetric three-dimensional display device according to a first embodiment of the present invention, and FIG. 2 is a side sectional view of the volumetric three-dimensional display device shown in FIG.

1 and 2, a volumetric three-dimensional display device 10 according to a first embodiment of the present invention includes a panel 100, a collimation module 110, and a liquid wetting lens array 120 do.

The panel 100 outputs light for displaying an image of the volumetric three-dimensional display device 10 according to the first embodiment of the present invention, and outputs the light for displaying an image of the volumetric three-dimensional display device 10) corresponding to the number of pixels.

The panel 100 includes a backlight unit (BLU), a polarizing plate, and a color filter (not shown) for outputting light for displaying an image, and the light output from each unit pixel 101 White light including red (R), green (G), and blue (B) corresponds to a non-coherent light source. A technique for outputting light for displaying an image through the pixel 101 of the panel 100 using a backlight unit, a polarizing plate, and a color filter may be applied to a liquid crystal display (Liquid, Crystal Display, LCD), and therefore, a detailed description thereof will be omitted here.

The collimation module 110 outputs the incoherent light output from the panel 100 to the liquid wet lens array 120 as collimated light.

3, the collimation module 110 includes the same number of lens groups corresponding to the arrangement of the pixels 101 of the panel 100, Lt; / RTI >

3, it can be seen that non-coherent light output from each of the pixels 101 of the panel 100 is output as collimated light, which is a coherent light source, through the corresponding lens group 111 in the collimation module 110 .

The liquid wet lens array 120 is a lens array capable of changing the focus by controlling the contact angle of two liquids using electrowetting so that the number of lens groups of the pixels 101 of the panel 100 and the collimator module 110 And the number of liquid wetting lenses 121 that are the same as the number of liquid wetting lenses. Electro wetting refers to a technology for controlling the contact angle of liquid by controlling the surface tension of liquid on the hydrophobic film after depositing an insulating layer on the electrode and is well known to those of ordinary skill in the art. It is omitted.

Each liquid wetting lens 121 includes an electrode, a dielectric layer, and a hydrophobic film. The liquid wetting lens 121 is manufactured by injecting a hydrophobic liquid and a hydrophilic liquid into the lens hole. As the voltage is applied to the electrode, the contact angle of the hydrophobic / hydrophilic liquid changes Thereby forming different focal distances. In addition, the area 122 other than the part serving as the lens 121 is colored black so that an unnecessary light source is crosstalked to prevent image quality from being deteriorated. Such a liquid wetting lens array 120 is already well known, and a detailed description thereof will be omitted here.

It should be noted that the number of liquid wetting lenses 121 and the aperture width in the liquid wetting lens array 120 according to the first embodiment of the present invention are not limited to the number and width of the lens groups 121 of the collimator module 110 And are adapted to correspond to each other.

The volume type three-dimensional display device 10 according to the first embodiment of the present invention converts light generated in each pixel 101 of the panel 100 into collimated light through the collimation module 110 , And the collimated light is condensed in space using the liquid wet lens array 120 so as to form pixels of the three-dimensional display.

4 is a view showing a driving principle of a volume type three-dimensional display device 10 according to the first embodiment of the present invention

Referring to FIG. 4, lenses having different refractive indexes, that is, diopters, can be formed according to the voltage applied to each liquid wetting lens 121 of the liquid wetting lens array 120.

This lens may be a convex, concave, or planar lens. At this time, when the collimation light is the same as the characteristic of the backlight source coming from infinity, the light is formed at one point according to the focal length of the lens, Voxel is formed.

) 액체 습윤 렌즈(121)는 아래 수학식 1에 의해 단위 픽셀(101)을 확대하거나 축소시키는 역할을 하기 때문에 Voxel을 형성할 수가 없다. 따라서, Voxel을 형성하기 위해서는 시준 모듈(200)의 역할이 중요하다.At this time, when the light incident on the lens is not collimated light (

) The liquid wetting lens 121 can not form a voxel because it functions to enlarge or reduce the unit pixel 101 by the following equation (1). Therefore, the role of the collimation module 200 is important for forming the voxel.

[Equation 1]

Therefore, in the first embodiment of the present invention, incoherent light output from each pixel 101 of the panel 100 is converted into collimated light by using the lens group 111 of the collimation module 110, A volume 3D image is provided by forming a surface having a three-dimensional effect by making the Voxel formed in the space shown in the above-mentioned [Equation 1] be a continuous set by making incident on each liquid wetting lens 121 of the array 120 .

Next, a volume type three-dimensional display device according to a second embodiment of the present invention will be described.

FIG. 5 is an exploded perspective view of a volume type three-dimensional display device according to a second embodiment of the present invention, and FIG. 6 is a side sectional view of the volume type three-dimensional display device shown in FIG.

5 and 6, the volumetric three-dimensional display device 20 according to the second embodiment of the present invention includes a point light source 200, a collimation module 210, polarizers 220 and 240, Display 230 and a liquid wet lens array 240. [

The point light source 200 is used as a back light source of the volume type three-dimensional display device 20 according to the second embodiment of the present invention, and an LED (Light Emitting Diode) or a laser can be used.

The collimation module 210 outputs the non-coherent light output from the point light source 200 to the polarizing plate 220 as collimated collimated light, which is large-area coherent light.

The collimating module 210 is formed of one lens group 211 as shown in FIG. 7, and the lens group at this time is a lens group of the volume three-dimensional display device 20 according to the second embodiment of the present invention. And is formed to have a large aperture size similar to the size.

In the case of the polarizing plate 220, the polarizing plates 220 and 250 polarize the light output from the collimating module 210 and output the polarized light to the transparent display 230, In the case of the polarizing plate 250, the light output from the liquid wetting lens array 240 is polarized and output to the outside. For such polarizers 220 and 250, a polarizer well known in the art is used.

The transparent display 230 includes a liquid crystal and a color filter, and includes a pixel 231 corresponding to the number of pixels of the volumetric three-dimensional display device 20 according to the second embodiment of the present invention do. The transparent display 230 may also be configured in the form of a spatial light modulator capable of modulating the amplitude and phase of the light source.

The transparent display 230 passes the light polarized through the polarizer 220 to the liquid wet lens array 240 that is output from the collimation module 210 and controls the ON / OFF control of the pixel 231 of the transparent display 230 To control the area of the light passing through the transparent display 230 according to the < / RTI > That is, light input from the polarizer 220 can be transmitted to the liquid wet lens array 240 through the pixel 231 that is turned on from the transparent display 230, It is controlled not to pass. Of course, on / off control of the pixel 231 in the transparent display 230 can also be operated in the opposite case.

The liquid wet lens array 240 is an array of lenses capable of varying the focus by controlling the contact angle of two liquids using electrowetting so that the liquid wet lens array 240 can be of the same number as the number of pixels 231 of the transparent display 230 241).

The liquid wetting lens array 240 has the same configuration and function as the liquid wetting lens array 120 described in the first embodiment of the present invention, and thus a detailed description thereof will be omitted.

However, the number of liquid wetting lenses 241 and the opening width of the liquid wetting lens array 240 according to the second embodiment of the present invention correspond to the number and width of the array of pixels 231 of the transparent display 230 .

8, the volume type three-dimensional display device 20 according to the second embodiment of the present invention as described above is configured such that light emitted from the point light source 200 is transmitted through a collimating module 210, And controls only light in a region corresponding to some pixels 231 of the collimated light using the transparent display 230 so that only the controlled light is input to the liquid wetting lens array 240, Liquid-wet lens array 240 to form a pixel of the three-dimensional display. The principle of forming a three-dimensional display pixel using the liquid wetting lens array 240 has already been described in the first embodiment of the present invention, so a detailed description thereof will be omitted.

As described above, in the first and second embodiments of the present invention, a liquid-wet lens array (120, 240) is used to form a pixel (Voxel) in a space to implement a three- Thus, it is possible to realize a three-dimensional image without using special glasses, and to integrate a conventional volumetric three-dimensional display device by driving liquid wet lenses 120 and 240, Dimensional image can be implemented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (11)

A panel for outputting light for displaying an image through a plurality of pixels;
A collimating module including the same number of lens groups as the plurality of pixels and outputting light output from the panel as collimated light; And
Wherein the plurality of liquid wetting lenses are the same number as the plurality of pixels, wherein the liquid wetting lens is a lens that changes the focus by controlling the contact angle of the two liquids using electrowetting, wherein the focal length of the collimated light output from the collimating module A liquid-wetting lens array
Dimensional display device. The method according to claim 1,
Wherein the panel comprises a backlight unit, a polarizing plate and a color filter, and each pixel outputs a white light which is a non-coherent light source including R (Red), G (Green) and B A three-dimensional display device. The method according to claim 1,
Wherein the lens group of the collimation module is composed of lenses within one frame and outputs non-coherent light output from each pixel of the panel as coherent light. The method according to claim 1,
Wherein the number and arrangement of the liquid wetting lenses in the liquid wetting lens array correspond to the number and width of the lens groups in the collimating module. A collimation module for outputting light output from the point light source as collimated light in the form of parallel light;
A transparent display configured by a plurality of pixels including a liquid crystal and a color filter, and controlling an area of collimated light output from the collimating module by controlling the plurality of pixels; And
Wherein the liquid wetting lens is the same number of liquid wetting lenses as the plurality of pixels wherein the liquid wetting lens is a lens that changes the focus by controlling the contact angle of the two liquids using electrowetting, A variable liquid wet lens array
Dimensional display device. 6. The method of claim 5,
A first polarizer for polarizing light output from the collimating module and outputting the polarized light to the transparent display; And
A second polarizing plate for polarizing light output from the liquid wetting lens array and outputting the polarized light to an external space;
Dimensional display device. 6. The method of claim 5,
Wherein the transparent display performs ON / OFF control for the plurality of pixels so that each of the plurality of pixels performs passage or blocking of collimated light output from the collimation module, respectively. 6. The method of claim 5,
Wherein the collimation module is formed of one lens group, and the lens group is formed to have a large opening width of the size of the volume type three-dimensional display device. 6. The method of claim 5,
Wherein the number and arrangement of the liquid wetting lenses in the liquid wetting lens array correspond to the number and width of the pixels in the transparent display. 6. The method according to claim 1 or 5,
Wherein the liquid wetting lens is formed by injecting a hydrophobic liquid and a hydrophilic liquid into the hole of the liquid wetting lens, the contact angle of the hydrophobic liquid with the hydrophilic liquid according to a voltage applied to the electrode, And a focal distance is formed due to the change of the focal length. 6. The method according to claim 1 or 5,
Wherein the liquid wetting lens array colorizes the rest of the area excluding the liquid wetting lens part to black so as to prevent unnecessary invasion of the light source.

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