KR20090083248A - Projection system for three-dimensional image photographing - Google Patents

Abstract

A projection system for a 3D stereo-scopic image is provided to project the clear image of the high definition by fixing the horizontal and convergence angle of 3D stereo-scopic image using one projector. A projection system for a 3D stereo-scopic image comprises a lamp(110), a color wheel(120), a DMD panel(130), a lens system(140) and a polarization filtering unit(150) The lamp supplies the light of the white to a color wheel. The color wheel generates a plurality of poly-chromatic lights by passing the light supplied from the lamp. The color wheel rotates at a specific speed. The poly-chromatic light having the specific color is made by passing the light of the white supplied by the rotation of the color wheel from lamp. The polarization filtering unit is made of a rotating disc and contactless exercise transfer unit. The rotating disc transmits the image light which the DMD panel reflects. The contactless exercise transfer unit delivers the torque for rotating the rotating disc from a motor.

Description

Projection System for 3D Stereoscopic Image {Projection System for Three-dimensional Image Photographing}

The present invention relates to a projection system for 3D stereoscopic images, and more particularly, to project a high quality stereoscopic image by wearing polarized glasses by projecting a 3D stereoscopic image produced as a left / right stereoscopic image onto a screen using a single projector. The present invention relates to a projection system for 3D stereoscopic images.

Stereoscopic image is emerging as the next generation image in the world, and attention is being paid to the high value-added industrial field of the future in each country. However, the focus of research is focused on the field of TV monitors, and the development of projectors dedicated to 3D stereoscopic images has never been worldwide.

1 is a configuration of a projection system for displaying a 3D stereoscopic image using two conventional projectors. As shown in FIG. 1, in the related art, left and right polarizing filters are respectively disposed in front of a projector lens and projected on a screen by using separate equipment such as a demultiflexer in two projectors. The method of accurately synchronizing the screen of the screen into a single screen and wearing polarized glasses to watch is mainly used. However, in the conventional method as described above, the setting state of the two projectors is changed from time to time, and the original horizontal and viewing angles of the produced contents are also changed differently. In this state, watching the stereoscopic images for a certain period of time caused eye fatigue and, in severe cases, headache and vomiting.

In order to solve the above problems, a method of projecting a stereoscopic image on a general screen with a ready-made projector and wearing shutter glasses using an LCD has been attempted, but such a conventional method causes eye fatigue due to flicker. In addition, side effects such as light loss and ghosting due to limitations of the LCD are generated, and commercialization has been limited because the shutter glasses are expensive.

Therefore, recently, a device that enables 3D stereoscopic projection by installing a separately manufactured polarization filtering device in front of one projector lens has been released and used in large movie theaters, but it is too large and expensive equipment ranging from thousands to hundreds of millions of units. Because of this, there is a problem that can not be easily used in general demands that use a small projector.

Therefore, the horizontal and the angle of view are fixed using a single projector, and side effects such as flickering and ghosting are not generated, and high quality stereoscopic images can be realized, and without expensive equipment such as demux, it is inexpensive. There is an urgent need for a realistic and versatile solution that can be used at a cost.

Accordingly, the present invention has been made to solve the above-described problems, the present invention is because the horizontal and viewing angle of the 3D stereoscopic image is fixed by using one projector that is integrally provided with one polarization filtering device, In the case of using two projectors of the present invention, the problem caused by the change of the horizontal and the viewing angle is solved, and relates to a projection system for 3D stereoscopic images that display high-quality clear images.

In addition, since the present invention uses only one projector that is integrally provided with one polarization filtering device without any additional equipment such as a demux, the equipment can be miniaturized and lightened, so that the general home or the like can be used without regard to the place. The present invention relates to a projection system for 3D stereoscopic image that can be freely used in an office or the like and is economical in terms of cost.

In addition, the present invention is possible to move the integrally integrated polarization filtering device, since the polarization filtering device can be arranged in a region other than the optical path region of the image light when the 2D image is screened, separate equipment or parts The present invention relates to a projection system for 3D stereoscopic images that can display both 2D and 3D images by one projector that is integrally provided with a polarization filtering device without additional addition.

According to an embodiment of the present invention for achieving the above object, a projection system for 3D stereoscopic images includes a lamp for supplying white light; A color wheel for passing the light supplied from the lamp to generate a plurality of multicolor lights; A DMD panel reflecting image light obtained by synthesizing the multi-color light generated by the color wheel and prestored digital image signals; And a lens system that transmits the image light reflected by the DMD panel, and a plurality of lenses are sequentially disposed, the projection system comprising: any one of a plurality of lenses in a lens system in which the plurality of lenses are sequentially arranged. And a polarization filtering device disposed in front of one fixed lens.

In the projection system for 3D stereoscopic image of the present invention, since the horizontal and viewing angles of the 3D stereoscopic image are fixed by using one projector in which one polarization filtering device is integrated, when using two conventional projectors, The problem caused by the change of the horizontal and the viewing angles is solved, so that a high-quality clear image can be displayed.

In addition, since the present invention uses only one projector that is integrally provided with one polarization filtering device without any additional equipment such as a demux, the equipment can be miniaturized and lightened, so that the general home or the like can be used without regard to the place. It can be used freely in places such as offices and is economical in terms of cost.

In addition, since the polarization filtering device can be moved, the polarization filtering device can be disposed in a region other than the optical path region of the image light when the 2D image is displayed, so that the polarization filtering device can be polarized without additional equipment or components. There is an effect that can display both 2D and 3D images by one projector that is integrally provided with a filtering device.

Hereinafter, with reference to the accompanying drawings for the optimal embodiment of the present invention will be described the configuration and operation.

2 is a configuration diagram of a 3D stereoscopic projection system according to the present invention. The 3D stereoscopic projection system 100 includes a lamp 110, a color wheel 120, a DMD panel 130, and a lens system ( 140 and the polarization filtering device 150.

In more detail, the lamp 110 supplies white light to the color wheel 120.

The color wheel 120 generates a plurality of multi-colored light by passing the light supplied from the lamp 110. The color wheel 120 rotates at a constant speed, and thus, the white wheel supplied from the lamp 110 is passed by the rotation of the color wheel 120 to generate multicolored light having a specific color.

The digital micro mirror device (DMD) panel 130 reflects image light obtained by synthesizing the multicolored light generated by the color wheel 120 and the prestored digital image signal. The DMD panel 130 alternately reflects the left image light and the right image light once.

The DMD panel 130 includes a memory 132 and a DMD chip 133 in which a processor 131, a digital video signal is stored. The DMD chip 133 receives the multicolored light generated by the color wheel 120, reads a prestored digital image signal from the memory 132, and combines the multicolored light and the digital image signal to reflect the synthesized color. It consists of a plurality of micro mirrors. The multicolored light input to the DMD chip 133 is combined with the digital image signal read from the memory 132 to become image light, and the image light is reflected by the micromirror of the DMD chip 133. The DMD chip 133 is composed of a corresponding number of micro mirrors according to the resolution, and the micro mirror is controlled by the processor 131 to reflect or non-reflect the image light according to the input digital image signal. .

The lens system 140 includes a plurality of lenses sequentially arranged to adjust the size of the image light reflected by the DMD panel 130 and transmit the light toward the screen.

As shown in FIG. 2, the polarization filtering device 150 is disposed in front of one of the fixed lenses 141 of the plurality of lenses in the lens system 140 in which the plurality of lenses are sequentially disposed.

As described above, when the polarization filtering device 150 is disposed in the lens system 140, the polarization filtering device is designed by designing the lens system 140 such that the width of the image light passing through the lens system 140 is as narrow as possible. The size of the rotating disc 151 of 150 can be reduced.

3A and 3B are front and perspective views of the polarization filtering device 150 according to the present invention.

As shown in FIGS. 3A and 3B, the polarization filtering device 150 may include a rotating disc including a polarization filter for transmitting polarized image light reflected by the DMD panel 130 to generate polarized image light. 151 and a contactless motion transmission device 152 and a detection point sensor 153 for transmitting a rotational force for rotating the rotating disk 151 from the motor.

In more detail, the rotating disc 151 is rotated by the rotational force transmitted from the contactless motion transmission device 152 and transmits the left image light and the right image light alternately once, and then polarizes the left image light and the polarized light. Generated right image light.

In general, the 3D stereoscopic images captured are projected by crossing the left image light and the right image light at a speed of 60 to 120 times per second. Accordingly, the rotation disc 151 rotates at a speed of 30 to 60 times per second so that the left image light and the right image light pass through the left polarization filter and the post light filter attached to the rotation disc 151. The left polarization filter transmits the left image light and the post light filter transmits the right image light. In this case, the rotation speed of the rotation disc 151 is controlled by the detection point sensor 153.

3C is a plan view of the rotating disc 151 of the polarization filtering device 150 according to the present invention.

As shown in FIG. 3C, in the polarization filter attached to the rotating disc 151, the left polarizing filter and the post-optical filter are respectively symmetrical on both sides divided into two parts based on the diameter passing through the center point of the rotating disc 151. Is formed.

In general, the sharpest image can be seen when the polarization plane of the left polarization filter is perpendicular to the polarization plane of the post-optical filter.

Accordingly, in the left polarization filter formed on the rotating disc 151 of the present invention, fifteen fan-shaped left polarizing filters having a center angle of 12 degrees are arranged adjacent to each other to form a semi-circular radial shape. In the postal light filter, 15 fan-shaped postal light filters having a center angle of 12 degrees are arranged adjacent to each other to form a semicircle radial shape. The left polarizing filter and postal light filter forming a semicircular radial shape are disposed on the rotating disc 151. It is formed symmetrically with each other.

The central angle of the fan shape forming the left polarizing filter and the post light filter is 12 degrees so that the polarizing filter is maintained within the allowable angle in the optical path through which the image light passes when the rotating disc 151 rotates. This is because the optimized center angle is 12 degrees. As the number of divisions of the left polarizing filter and the post light filter formed on the rotating disc 151 increases, the effect of the polarizing filter is improved.

In addition, an opaque detection point 154 is formed at the boundary between the left polarizing filter and the post light filter, which are formed symmetrically on the rotating disc 151. The DMD panel 130 reflects the multi-colored light that has passed through the color wheel 120 and the image light obtained by synthesizing the read digital image signal twice, and the one rotational speed of the rotating disc 151 matches. When the detection point detection sensor 153 synchronizes, the detection point 154 is used. The detection point 154 preferably has a diameter of 2mm to 3mm.

The rotating disc 151, it is preferable to use a thin optical glass of a material having good transparency and excellent heat resistance.

3d is an exploded view of the polarization filtering device 150 according to the present invention.

As shown in FIG. 3D, the contactless motion transmission device 152 of the polarization filtering device 150 includes two magnet-type bearing rings 152-2 and 152-3 and a bracket 152-4. ), The motor 152-5 and the bearing cover 152-1.

The contactless motion transmission device 152 transmits a rotational force for rotating the rotation disk 151 from the motor 152-5 to the rotation disk 151. Since the ring-shaped rings 152-2 and 152-3 of the contactless motion transmission device 152 are made of permanent magnets, the positive pole and the outer diameter of the bearing-shaped rings 152-2 and 152-3 are formed. -A magnetic force with polarity is formed to transmit the rotational force even in the non-contact state.

One of the bearing-shaped rings 152-2 and 152-3 is connected to the motor 152-5, and the other is connected to the center of the rotation disc 151 to transmit the rotational force of the motor 152-5. The bearing rings 152-2 and 152-3 are installed as close as possible so as not to contact each other. In order to install the bearing rings 152-2 and 152-3 as close as possible to avoid contact with each other, a thin paper is inserted between the two magnet bearing rings 152-2 and 152-3. Then, the bearing-shaped rings 152-2 and 152-3 into which the thin paper is inserted are fixed to the bracket 152-4 or the like, and then the inserted paper is removed.

In the contactless motion transfer device 152, when the motor 152-5 is driven while the motor 152-5 and the rotation disc 151 are not in contact with each other, the rotation disc 151 is connected to the motor 152-. 5) Rotating in the direction opposite to the rotation direction of, and the closer the position between the two rings (152-2, 152-3) that are not in contact with each other, the stronger the torque (force), the weaker the farther.

The detection point sensor 153 is mounted at a predetermined position on the lower side of the rotating disc 151, and the DMD panel 130 reads the multi-colored light that has passed through the color wheel 120 and the digital image signal read out. The speed of reflecting the synthesized image light twice and the rotational speed of the rotating disc 151 are synchronized. Since the DMD panel 130 reflects the left image light and the right image light alternately once, the DMD panel 130 reflects the image light twice in total and the rotation speed of the rotating disc 151. In synchronization, the left polarization filter of the rotating disc 151 transmits the left image light and the post light filter of the rotating disc 151 transmits the right image light.

The detection point sensor 153 is configured to synchronize the speed of reflecting the image light synthesized by the DMD panel 130 twice with the one rotation speed of the rotation disc 151 so as to synchronize the rotation disc 151. A motor detecting the detection point 154 formed at the boundary between the left polarization filter and the post-optical filter, detecting a state signal, and rotating the rotating disc 151 using the detected state signal. 152-5) RPM (speed per minute) is controlled.

As described above with reference to FIGS. 2, 3A to 3D, and the detailed description, the projection system for 3D stereoscopic image of the present invention uses a single projector in which one polarization filtering device 150 is integrally installed to 3D stereoscopic image. Since the horizontal and viewing angles of the camera are fixed, the problem caused by changing the horizontal and viewing angles when using two existing projectors is solved, so that not only a clear and high-definition image can be displayed, but also the equipment is miniaturized and It is light in weight and can be used freely in places such as ordinary homes or offices without being concerned with places, and is economical in terms of cost.

In the projection system for 3D stereoscopic image according to another embodiment of the present invention, the polarization filtering device 150 is movable up, down, left and right, so that the optical path of the image light passing through the lens system 140 when the 2D image is displayed. It is also possible to arrange in an area other than the area.

4 is a configuration diagram of a 3D stereoscopic projection system in which a polarization filtering device 150 according to the present invention is disposed in a region other than an optical path region of image light.

As shown in FIG. 4, when displaying a 2D image, the polarization filtering device 150 is moved up and down or left and right, and is disposed in an area other than an optical path region of the image light passing through the lens system 140, and is a 3D stereoscopic image. In the case of displaying an image, the polarization filtering device 150 is moved up and down or left and right again and is disposed in the optical path region of the image light passing through the lens system 140. The projection system for 3D stereoscopic image of the present invention is a 3D stereoscopic image. In addition, 2D video can be screened.

As described above, according to the present invention, since the polarization filtering device 150 is movable, the polarization filtering device 150 may be disposed in a region other than the optical path region of the image light when the 2D image is displayed. There is an effect that can display both 2D and 3D images by one projector that is integrally provided with the polarization filtering device 150 without adding equipment or parts.

Embodiments of the present invention are disclosed in the drawings and the detailed description, and the specific terms used above are used only for the purpose of describing the present invention, and are used to limit the scope of the present invention as defined in the meaning or claims. It is not.

Therefore, those skilled in the art of the present invention can be various modifications and other equivalent embodiments from this, and the true technical protection scope of the present invention will be determined by the technical spirit of the claims.

1 is a configuration of a projection system for displaying 3D stereoscopic images using two conventional projectors

2 is a block diagram of a 3D stereoscopic projection system according to the present invention

3A and 3B are front and perspective views of a polarization filtering device according to the present invention.

Figure 3c is a plan view of a rotating disc of the polarization filtering device according to the present invention

3d is an exploded view of a polarization filtering device according to the present invention;

4 is a configuration diagram of a 3D stereoscopic projection system in which a polarization filtering device according to the present invention is disposed in a region other than an optical path region of image light;

Explanation of symbols on the main parts of the drawings

100: 3D stereoscopic projection system

110: lamp 120: color wheel

130: DMD panel 140: lens system

141: fixed lens 150: polarization filtering device

151: rotating disc 152: contactless motion transmission device

153: detection point detection sensor 154: detection point

Claims (8)

A lamp for supplying white light; A color wheel for passing the light supplied from the lamp to generate a plurality of multicolor lights; A DMD panel reflecting image light obtained by synthesizing the multi-color light generated by the color wheel and prestored digital image signals; And a lens system for projecting the image light reflected by the DMD panel and having a plurality of lenses sequentially arranged. And a polarization filtering device disposed in front of any one of the plurality of lenses in the lens system in which the plurality of lenses are sequentially arranged. 3. The method of claim 1, wherein the polarization filtering device, A rotating disc having a polarization filter attached thereto to transmit the image light reflected by the DMD panel to generate polarized image light; And a non-contact motion transmission device for transmitting a rotational force for rotating the rotating disc from a motor. 3D stereoscopic projection system. The method of claim 2, wherein the polarization filtering device, And a detection point sensor for synchronizing the DMD panel to reflect the multi-colored light passing through the color wheel and the image light obtained by synthesizing the read digital video signal twice and the rotational speed of the rotating disc. Projection system for 3D stereoscopic image, characterized in that. The method of claim 2, wherein the polarizing filter attached to the rotating disc, 3D stereoscopic projection system, characterized in that the left polarizing filter and the post-optical filter are symmetrically formed on both sides divided into two parts based on the diameter passing through the center point of the rotating disc. The method according to claim 4, The left polarizing filter has a fan-shaped left polarizing filter having a central angle of 12 degrees and is arranged adjacent to each other to form a semi-circular radial shape. In the postal light filter, 15 fan-shaped postal light filters having a central angle of 12 degrees are arranged adjacent to each other to form a semicircular radial shape. And the left polarizing filter and the post-light filter forming a semi-circular radial shape are symmetrically formed on the rotating disc. The rotating disc of claim 4 or 5, An opaque detection point is formed at a boundary between a symmetrically formed left polarizing filter and a postal light filter. The method of claim 4, wherein the rotating disc, 3D stereoscopic image, which is rotated by the rotational force transmitted from the contactless motion transmitting device, and transmits the left image light and the right image light alternately once to generate polarized left image light and polarized right image light. Projection system. The method of claim 1, wherein the polarization filtering device, 3D stereoscopic projection system, which can be moved up, down, left and right and is disposed in a region other than the optical path region of the image light passing through the lens system when the 2D image is displayed.

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