KR101639079B1 - Three dimensional Projector - Google Patents

Abstract

The present invention relates to a three-dimensional projector.
That is, the three-dimensional projector of the present invention includes a first optical element for converting non-polarized light incident from a light source into first and second polarized lights having different polarization directions and emitted at mutually different angles; Wherein the first and second polarized lights of the first optical element incident on the first MLA are arranged on the upper side of the microlenses of the second MLA, A FEL (Fly Eye Lens) which is separated and gathered downward; And a second optical element for converting the first and second polarized light collected at the upper side or the lower side of the microlenses of the second MLA of the FEL into a polarized light of one of the first and second polarized lights.

Description

[0001] The present invention relates to a three-dimensional projector,

The present invention relates to a three-dimensional projector capable of projecting a three-dimensional image on a screen in one projector apparatus.

Stereoscopic images are emerging as the next generation of images in the world, and various countries are actively studying the stereoscopic image field by paying attention to the future high value-added industries.

Generally, three-dimensional images are made by the principle of stereoscopic vision through the two eyes of a person. Binocular parallax, which occurs because the eyes are separated by about 65mm, is the most important factor of the stereoscopic effect.

The three-dimensional image display has a spectacular display and a non-spectacular display.

In the spectacular three-dimensional image display, the polarizing directions of the left and right images are made different from each other, the stereoscopic image is displayed by polarizing glasses, the left and right images are displayed by the time division method, and the stereoscopic image is viewed by using the liquid crystal shutter glasses.

The polarizing glasses system separates the left eye image and the right eye image by using different properties of the vibration direction of the linearly polarized light or the rotation direction of the circularly polarized light and displays the left eye image and the right eye image simultaneously on the first projector and the second projector And the polarizing direction is perpendicular to each other.

Then, the three-dimensional image can be seen by synthesizing the images from the first and second projectors and separating the left eye image and the right eye image through the right and left polarized glasses orthogonal to each other.

In the time division method, the left and right images are alternately presented. When the left eye image is presented, only the left eye image is formed. When the right eye image is presented, only the right eye image is formed. There is a time-divisional spectacle shutter system in which the right and left images are switched through glasses, and a time-divisional polarized spectacle system in which the display is switched.

However, since there is an inconvenience that the user wears glasses, the non-eyeglass type display is preferred.

The non-glasses type display is to obtain a three-dimensional image by separating left and right images without using glasses.

There are, for example, the parallax barrier method and the lenticular method in the non-eyeglass method.

The parallax barrier method is to alternately print the images to be viewed in both the right and left eyes in a vertical pattern or print them with photographs and use them as an extremely thin vertical lattice column, that is, a barrier.

By doing so, the vertical pattern image to be entered into the left eye and the vertical pattern image to be entered into the right eye are distributed by the barrier, and the images of the different view points are seen by the left eye and the right eye, respectively.

The projection type image display device enlarges an image formed on the display device through a projection lens unit and projects the image on a screen, and realizes a three-dimensional image by a left-eye image separator provided on the screen.

The present invention solves the problem that a three-dimensional image can be projected onto a screen in one projector apparatus.

According to the present invention,

A first optical element for converting non-polarized light incident from a light source into first and second polarized lights having different polarization directions and emitted at mutually different angles;

Wherein the first and second polarized lights of the first optical element incident on the first MLA are arranged on the upper side of the microlenses of the second MLA, A FEL (Fly Eye Lens) which is separated and gathered downward;

And a second optical element for converting the first and second polarized light collected at the upper side or the lower side of the microlenses of the second MLA of the FEL into one polarized light of the first and second polarized lights and outputting the same. do.

According to the present invention,

A collimation lens for advancing the unpolarized light emitted from the light source in parallel in a predetermined direction;

A photoelectric conversion element capable of converting unpolarized light of the collimation lens into a first polarized light or a second polarized light having mutually different polarization directions;

And a lens group for condensing the first polarized light or the second polarized light converted in the light conversion element onto a screen element.

The three-dimensional projector according to the present invention can convert non-polarized light emitted from a light source into a single polarized light having a single polarization direction by a photo-conversion device. Therefore, in a screen element in which light having a single polarization direction is illuminated, It is possible to realize a left eye image light and a right eye image light having 1 and 2 polarized lights, and thus a three-dimensional image can be projected on a screen in one projector apparatus.

Further, the three-dimensional projector of the present invention has an effect that the two-dimensional screen and the three-dimensional screen can be freely changed and projected onto the screen.

1 is a view for explaining a schematic configuration of a three-dimensional projector according to the present invention;
2 is a view for explaining a schematic configuration of a photoconversion device of a three-dimensional projector according to the present invention;
3A to 3D are conceptual diagrams for explaining the function of the active optical element constituting the first optical element applied to the three-dimensional projector according to the present invention
4A to 4D are views for explaining a schematic configuration of a first optical element applied to a three-dimensional projector according to the present invention
5 is a conceptual diagram for explaining an operation of converting a non-polarized light into an S wave in the photoconversion device of the three-dimensional projector according to the present invention
6 is a conceptual diagram for explaining the operation of converting the unpolarized light into the P wave in the photoconversion device of the three-dimensional projector according to the present invention
7 is a conceptual diagram for explaining an operation of sequentially converting non-polarized light into an S wave and a P wave in the photoconversion device of the three-dimensional projector according to the present invention
8 is a schematic diagram for explaining a configuration of an example of a three-dimensional projector according to the present invention
9 is a conceptual diagram illustrating a photoconversion device of a three-dimensional projector according to another embodiment of the present invention
10 is a conceptual diagram illustrating a photoconversion device of a three-dimensional projector according to another embodiment of the present invention
Fig. 11 is a conceptual diagram for explaining a three-dimensional projector according to the present invention emitting a two-dimensional image

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The three-dimensional projector according to the present invention is for forming a three-dimensional image by configuring the polarization directions of the left and right images to be different from each other, and has components for projecting a three-dimensional image on a screen in one projector apparatus.

1 is a view for explaining a schematic configuration of a three-dimensional projector according to the present invention.

The three-dimensional projector of the present invention is a projector capable of generating a left eye image and a right eye image having first and second polarized lights having different polarization directions.

The three-dimensional projector of the present invention includes a light conversion element 11 capable of converting light, which is illuminated by the screen element 500 in the illumination unit 10, into a first polarized light or a second polarized light having mutually different polarization directions It is.

For example, when the photoconversion device 11 is included in the illumination unit as shown in FIG. 1, light emitted from the photoconversion device 11 to the screen device 500 may be converted into light having a different polarization direction Polarized light or the second polarized light and the first and second polarized lights are alternately illuminated on the screen element 500, the three-dimensional projector of the present invention can display the left-eye and right- The right eye image can be generated.

In other words, the first polarized light is illuminated so that the screen element implements a left eye image, and the second polarized light is illuminated so that the screen element implements a right eye image.

The first polarized light is a polarized light perpendicular to the second polarized light.

FIG. 2 is a view for explaining a schematic configuration of a photoconversion device of a three-dimensional projector according to the present invention, and FIGS. 3A to 3D are diagrams for explaining a schematic configuration of an active optical element constituting a first optical element applied to a three- Fig.

The optical converter included in the three-dimensional projector includes first optical elements 210 and 220 that convert non-polarized light incident from a light source into first and second polarized lights having different polarization directions and emitted at mutually different angles; The first and second polarized lights of the first and second optical elements 210 and 220, which are incident on the first MLA 230, are composed of first and second MLAs (Micro Lense Arrays) 230 and 240, 2 FLA (Fly Eye Lens) 230 and 240 which are separated into upper and lower sides of the microlenses of the MLA 240; Second optical elements 250 and 260 for converting the first and second polarized light collected on the upper side or the lower side of the microlenses of the second MLA 240 of the FEL 230 and 240 into one polarized light of the first and second polarized lights, .

When the unpolarized light is incident on the first optical element 210 and 220 from the light source, the first optical element 210 and the second optical element 220 are converted into first and second polarized lights having different polarization directions and emitted at mutually different angles do.

The first and second polarized lights converted by the first optical elements 210 and 220 are incident on the first MLA 230 of the FEL 230 and 240 and the first MLA 230 transmits the first and second polarized lights And the upper and lower sides of the microlenses of the second MLA 240 are collected.

In addition, the second optical element 250, 260 converts the first and second polarized light collected on the upper side or the lower side of the microlenses of the second MLA 240 into a single polarized light of the first and second polarized lights, .

Here, the second optical element 250 and 260 may include a stripe pattern 250 formed of a 1/2 wave plate having an optical axis at an angle of 45 degrees with respect to the first polarized light or the second polarized light, 260 ', and in the stripe pattern' 250 ', the first polarized light converts the second polarized light or the second polarized light into the first polarized light and emits the converted light, and the transparent substrate' 260 ' The second optical element 250 and 260 can emit only the single polarized light of the first polarized light or the second polarized light by transmitting the first polarized light or the second polarized light.

The width W1 of the stripe pattern 250 formed by the half wave plate is 1/2 the width of the microlenses of the second MLA 240 and the interval W2 between the stripe patterns 250 And a half of the width of the microlenses of the second MLA 240.

In addition, the second MLA 240 of the FEL 230 and 240 is upwardly moved from the first MLA 230.

At this time, the microlenses of the second MLA 240 may be moved upward by about 1/4 of the length of the microlenses of the first MLA 230.

Therefore, the three-dimensional projector according to the present invention can convert non-polarized light emitted from the light source into the single polarization light having one polarization direction by the light conversion element, so that in a screen element in which light having the single polarization direction is illuminated It is possible to realize the left eye image light and the right eye image light having the first and second polarized lights having different polarizing directions and thus it is possible to project the three-dimensional image on the screen in one projector apparatus.

It is preferable that the first optical elements 210 and 220 are optical elements that receive unpolarized light and transmit one of the first and second polarized lights while the other optical element is angularly converted.

At this time, as the first optical elements 210 and 220 are turned on or off electrically, one of the first and second polarized lights is incident on the incident unpolarized light while the other optical element 210 and 220 are angularly converted And an active optical element.

The first optical elements 210 and 220 transmit the first polarized light to ON and convert the angle of the first polarized light into an OFF state and transmit the first polarized light to ON and OFF through a first active optical element 2 ' 210 '); And a second active optical element ('220' in FIG. 2) transmitting the first polarized light on and off, transmitting the second polarized light on, and off-converting the second polarized light .

3A, when the first polarized light is assumed to be a P-polarized light and the second polarized light is assumed to be S-polarized, the first active optical element 210 'transmits a P-wave to ON, Angle conversion.

In FIG. 3B, the first active optical element '210' transmits S waves on and off.

Then, as shown in FIG. 3C, the second active optical element '220' transmits the P wave on and off.

Also, as shown in FIG. 3D, the second active optical element '220' transmits S waves to the ON and angle-converts the S waves to OFF.

Also, the second active optical element 220 'may be implemented with the first active optical element 210' rotated by 90 degrees.

That is, the same element as the first active optical element 210 'may be rotated 90 degrees to implement the second active optical element 220' to perform the functions of FIGS. 3C and 3D.

4A to 4D are views for explaining a schematic configuration of a first optical element applied to a three-dimensional projector according to the present invention.

As described above, the first optical elements 210 and 220 transmit the non-polarized light incident thereon according to the ON or OFF state of the first optical element 210 and the second optical element 210, In particular, the first active optical element '210' for turning off the first polarized light and the second active optical element '220' for turning the second polarized light off can be arranged have.

Assuming that the first polarized light is a P-polarized light and that the second polarized light is an S-polarized light, when the first active optical element 210 is turned off and the second active optical element 220 is turned on, The wave is angularly converted and outputted, and the S wave is transmitted without being angularly transformed.

When the first active optical element '210' is turned on and the second active optical element '220' is turned off, the P wave is transmitted and the S wave is angularly converted as shown in FIG. 4b.

When the first and second active optical elements '210' and '220' are turned off as shown in FIG. 4C, the P wave and the S wave are angularly converted.

Further, when the first and second active optical elements '210' and '220' are turned on, the P wave and the S wave are transmitted without being angularly changed (FIG. 4D)

FIG. 5 is a conceptual view for explaining an operation of converting a non-polarized light into an S-wave in a photoconversion device of a three-dimensional projector according to the present invention, FIG. 7 is a conceptual diagram for explaining an operation of sequentially converting non-polarized light into an S wave and a P wave in a photoconversion device of a three-dimensional projector according to the present invention.

The first optical elements 210 and 220 are composed of a first active optical element 210 and a second active optical element 220 to turn on the first active optical element 210 and the second active optical element 220 5, in the unpolarized light incident on the first optical elements 210 and 220 in the light source, the P wave is angularly converted and emitted, and the S wave is transmitted as it is.

Therefore, the unpolarized light passing through the first optical elements 210 and 220 is separated into a P wave and an S wave.

Thereafter, the P waves, which are angle-converted by the first optical elements 210 and 220, are collected on the upper side of the microlenses of the second MLA 240 of the FEL 230 and 240 while passing through the FEL 230 and 240, Are collected on the lower side of the microlenses of the second MLA 240 of the FELs 230 and 240. [

The P waves collected on the microlenses of the second MLA 240 of the FEL 230 and 240 are converted into S waves by the second optical devices 250 and 260 and output to the second MLA 240 of the FEL 230 and 240, The S waves collected at the lower side of the microlenses of the second optical element 250 and 260 are transmitted as they are.

Therefore, the three-dimensional projector of the present invention is provided with a light conversion element which converts non-polarized light into S wave and emits it, so that light having a single polarization direction can be illuminated.

Here, the second MLA 240 of the FEL 230, 240 is upwardly moved from the first MLA 230.

That is, the second MLA 240 is upwardly moved from the first MLA 230, so that the P waves, which have been angle-converted through the first MLA 230, are collected on the upper side of the microlenses of the second MLA 240 And the S wave can be gathered on the lower side of the microlenses of the second MLA 240.

6, when the first active optical element '210' is turned off and the second active optical element '220' is turned on, the non-polarized light incident on the first optical elements 210 and 220 And the P wave passes through the FEL 230 and 240 and the second optical element 250 and 260 and is converted into a P wave.

As shown in FIG. 7, the first active optical element '210' is turned on, the second active optical element '220' is turned off, the S-wave is emitted from the second optical element 250 and 260, The first active optical element 210 is turned off and the second active optical element 220 is turned on so that the P-wave is emitted from the second optical element 250 and 260, And a P-wave.

Fig. 8 is a schematic configuration diagram for explaining a configuration of an example of a three-dimensional projector according to the present invention.

The photoconversion device applied to the three-dimensional projector of the present invention may be included in the optical system of the projector so that the projector can emit a three-dimensional image.

Therefore, the position of the light conversion element in the optical system of the three-dimensional projector of the present invention is not particularly limited.

However, in the three-dimensional projector of the present invention, it is preferable that the photoconversion element is present in the illumination part, and in particular, as shown in FIG. 8, it is preferable to be located between the collimation lens 110 and the illumination lens group 310 and 320.

That is, one example of a three-dimensional projector according to the present invention includes a collimation lens 110 for advancing unpolarized light emitted from the light source 100 in parallel in a predetermined direction, A light conversion element (200) capable of converting polarized light into first polarized light or second polarized light having mutually different polarization directions; And a lens group (310, 320) for condensing the first polarized light or the second polarized light, which is converted by the photoconversion device (200), onto the screen element (500).

Here, since the photoconversion device 200 includes the FEL, the photoconversion device 200 also functions as an integrator to uniformly enter the screen device 500.

9 is a conceptual diagram for explaining a photoconversion device of a three-dimensional projector according to another embodiment of the present invention.

In the photoconversion device of the three-dimensional projector of this embodiment, the photoconversion device is disposed such that unpolarized light is incident at a predetermined angle. When the non-polarized light is incident on the photoconversion device at a predetermined angle, So that the S wave and the P wave can be emitted perpendicularly to the light conversion element.

9 is a graph showing the relationship between the first optical element 210 'and the second active optical element 220' of the first optical elements 210 and 220 on and off from the second optical elements 250 and 260 An S wave and a P wave are outputted.

10 is a conceptual diagram illustrating a photoconversion device of a three-dimensional projector according to another embodiment of the present invention.

The photoconversion device of the three-dimensional projector according to the present invention has the capability of the first active optical element 210 'and the second active optical element 220' of the first optical elements 210 and 220 and the capability of the FELs 230 and 240 A slight S wave 261 leaks in an operation of outputting a P wave due to a positional deviation of the optical elements 250 and 260, and a slight P wave 262 leaks in an operation of outputting an S wave.

In order to remove such leaked light, as shown in Fig. 11, the optical conversion element of the three-dimensional projector further includes third optical elements 270 and 280. [

That is, the third optical elements 270 and 280 may include a third active optical element 270 ', which is the same element as the first active optical element 210' of the first optical elements 210 and 220, and a third active optical element 270 ' And a fourth active optical element '280', which is the same element as the second active optical element '220', and is disposed at the emission end of the second optical elements 250 and 260.

Therefore, when the third active optical element '270' is turned on and the fourth active optical element '280' is turned off, the P waves converted and emitted from the second optical elements 250 and 260 are transmitted, (261) is angularly transformed and removed.

When the third active optical element '270' is turned off and the fourth active optical element '280' is turned on, the S waves converted and emitted from the second optical elements 250 and 260 are transmitted, and the leaked P waves (262) is angularly transformed and removed.

At this time, the leaked S-wave 261 and P-wave 262 are not incident on the screen element but are absorbed and removed from the lens barrel guiding the optical system of the three-dimensional projector.

11 is a conceptual diagram for explaining a three-dimensional projector according to the present invention emitting a two-dimensional image.

In order to project the two-dimensional screen onto the screen, when the first and second active optical elements '210' and '220' of the first optical elements 210 and 220 are turned on, the P and S waves are not angularly transformed The unpolarized light incident on the first optical elements 210 and 220 is transmitted as it is.

The non-polarized light transmitted through the first optical elements 210 and 220 passes through the first and second MLA (Micro Lense Array) 230 and 240 and the second optical elements 250 and 260, and becomes unpolarized light traveling in an upward path By illuminating the screen element with unpolarized light, the three-dimensional projector of the present invention can realize a two-dimensional screen.

If the third optical elements 270 and 280 are disposed at the outgoing ends of the second optical elements 250 and 260, unpolarized light proceeding in an upward path can transmit unpolarized light in a direction perpendicular to the third optical elements 270 and 280 It becomes possible to emit.

Accordingly, the three-dimensional projector of the present invention has an advantage that a two-dimensional screen and a three-dimensional screen can be freely changed and projected onto a screen.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (17)

A first optical element for converting non-polarized light incident from a light source into first and second polarized lights having different polarization directions and emitted at mutually different angles;
Wherein the first and second polarized lights of the first optical element incident on the first MLA are arranged on the upper side of the microlenses of the second MLA, A FEL (Fly Eye Lens) which is separated and gathered downward;
And a second optical element for converting the first and second polarized light collected at the upper side or the lower side of the microlenses of the second MLA of the FEL into one polarized light of the first and second polarized lights.
The method according to claim 1,
Wherein the first optical element comprises:
And an active optical element configured to convert incident unpolarized light according to ON or OFF and to transmit any one of the first and second polarized lights and to output the angle-converted light.

The method according to claim 1,
Wherein the first optical element comprises:
A first active optical element that transmits the first polarized light to ON and converts the first polarized light to OFF and transmits the second polarized light to ON and OFF;
And a second active optical element that transmits the first polarized light on and off, and transmits the second polarized light to ON, and turns the angle of the second polarized light off.
The method of claim 3,
Wherein the second active optical element comprises:
And the same element as the first active optical element is rotated by 90 degrees.
The method according to claim 1,
Wherein the second optical element comprises:
A stripe pattern made of a 1/2 wave plate having an optical axis at an angle of 45 degrees with respect to the first polarized light or the second polarized light;
And a transparent substrate on which the stripe pattern is formed.
The method of claim 5,
In the stripe pattern, the first polarized light is converted into the first polarized light and emitted from the second polarized light or the second polarized light, and the transparent substrate is configured to transmit the first polarized light or the second polarized light, And the second optical element emits only the single polarized light of the first polarized light or the second polarized light.
The method of claim 5,
Wherein the width and the interval of the stripe pattern are 1/2 times the widths of the microlenses of the second MLA.
The method according to claim 1,
The second MLA of the FEL,
Wherein the first MLA is upwardly positioned above the first MLA.

The method according to claim 1,
The first polarized light may be,
And the second polarized light is polarized perpendicular to the second polarized light.
The method according to claim 1,
The first polarized light may be,
S-wave or P-Pine three-dimensional projector.
The method of claim 3,
When the first and second active optical elements are turned on, the incident unpolarized light is transmitted, and the first and second MLA and the second optical element are emitted as unpolarized light to project the two-dimensional screen onto the screen 3D projector.
The method according to claim 1,
Polarized light is incident on the first optical element at a predetermined angle, and the polarized light converted by the second optical element is made to exit perpendicularly to the second optical element.
The method according to claim 1,
Wherein the first polarized light is illuminated so that a screen element implements a left eye image, and the second polarized light is illuminated to implement a right eye image on the screen element.
The method according to claim 1,
And a third optical element for removing light leaking from the second optical element,
Wherein the third optical element comprises:
A third active optical element which is the same element as the first active optical element of the first optical element, and a fourth active optical element which is the same element as the second active optical element of the first optical element.
A collimation lens for advancing the unpolarized light emitted from the light source in parallel in a predetermined direction;
A photoelectric conversion element capable of converting unpolarized light of the collimation lens into a first polarized light or a second polarized light having mutually different polarization directions;
And a lens group that focuses the first polarized light or the second polarized light, which is converted by the light conversion element, on a screen element,
Wherein the photo-
A first optical element for converting unpolarized light of the collimation lens into first and second polarized lights having different polarization directions and emitted at mutually different angles;
Wherein the first and second polarized lights of the first optical element incident on the first MLA are arranged on the upper side of the microlenses of the second MLA, A FEL (Fly Eye Lens) which is separated and gathered downward;
And a second optical element for converting the first and second polarized light collected at the upper side or the lower side of the microlenses of the second MLA of the FEL into one polarized light of the first and second polarized lights.
16. The method of claim 15,
Wherein the photo-
And further functions as an integrator to uniformly enter the screen element.
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