KR100676977B1 - Lcos panel assembly of projection system - Google Patents

Abstract

An LCOS(Liquid Crystal On Silicon) panel assembly of a projection system is provided to prevent particles from infiltrating into a small panel to improve picture quality. An LCOS panel assembly(150) of a projection system includes an LCOS panel, a panel holder(154), a quarter wavelength plate holder(153), and a sealing member(152). The panel holder holds the LCOS panel in front of the LCOS panel and is fixed to a quad. The quarter wavelength plate holder is located in front of the panel holder and holds a quarter wavelength plate. The sealing member is placed before the quarter wavelength plate holder and seals the contact of the quarter wavelength plate holder and the quad.

Description

LCOS panel assembly of projection system

1 is a perspective view of a projection system in accordance with the teachings of the present invention.

2 is an exploded perspective view of a projection system display according to the present invention.

3 is a perspective view of an optical engine of the projection system of the present invention.

4 is a perspective view of the optical engine shown with the cover of the optical engine removed;

5 is a perspective view of a synthesis system in a projection system according to the present invention.

6 is a view for explaining the structure and operation of the synthesis system;

7 is a perspective view of an elcos panel assembly according to the present invention.

8 is an exploded perspective view of an elcos panel assembly according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: projection system 2: screen 3: front panel

4 back cover 5 reflection mirror 6 separation plate

151 1/4 wave plate 152 First sealer 153 1/4 wave plate holder

154: panel support 157: second sealer 175: elcos panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection system. Specifically, in a reflection type projection system in which light is reflected on an Elcos panel to form an image, a projection system in which an image quality is improved by preventing foreign material into the interior of the Elcos panel assembly. Relates to an elcos panel assembly.

Elcos (LCOS: Liquid Crystal On Silicon, hereinafter referred to as 'Elcos' for convenience) is a liquid crystal cell formed on a semiconductor substrate unlike a conventional liquid crystal display, and is a component of each pixel. The high-definition XGA-class resolution can be realized by compactly arranging and switching circuits in a compact size of about 1 inch. For this reason, the Elcos panel is attracting attention as a display device of the projection system, and the technology development and commercialization of the Elcos panel and the projection display system using the same are actively progressing.

The projection system implements a full-color screen in which white light is converted into R (red), G (green), and B (blue) light, and has three LCOS panels corresponding to R, G, and B light. The R, G, and B images implemented by each Elcos panel are used as a three-panel method in which a color image is synthesized and projected on a screen.

Such a general Elcos projection system includes a lighting system in which light is projected, a synthesis system for synthesizing each image of RGB formed on the Elcos panel after the light is projected, and a projection lens for projecting the light synthesized in the synthesis system. And a screen on which the light projected from the projection lens is formed into an image.

In addition, three composite elcos panel assemblies are fixed to the quad in the composite system, and the elcos panel assembly is provided with an elcos panel for forming an image and a quarter wave plate for converting linearly polarized light into circularly polarized light.

On the other hand, since the elcos panel and the quarter wave plate is enlarged to a large screen to form an image while the size reaches approximately 1 inch, if the foreign matter flows into the panel and the elcos panel and quarter wave plate In other words, the distortion of the screen caused by the foreign matter is significantly increased. Therefore, there is an urgent need for a perfect sealing structure to prevent foreign matter from entering the Elcos panel and quarter wave plate.

The present invention is proposed to improve the above-described problems, and the Elcos panel assembly of the projection system that prevents the deterioration of the image by preventing the inflow of foreign matter into the small panel in which the image is formed as a concept that includes the Elcos panel assembly It is for the purpose of suggestion.

In addition, an object of the present invention is to propose an Elcos panel assembly of a projection system that can prevent contamination of the Elcos panel by a simple structural change.

Elcos panel assembly of the projection system according to the present invention for achieving the above object is an Elcos panel; A panel support part supporting the elcos panel from the front and fixed to the quad; A quarter wave plate holder placed in front of the panel support to support a quarter wave plate; And a sealing member disposed in front of the quarter wave plate holder and having a predetermined thickness to seal a contact portion between the quarter wave plate holder and the quad.

The present invention has an advantage that the deterioration of the image can be prevented because foreign matters to the Elcos panel assembly can be prevented by the present invention as proposed. In particular, foreign matter is prevented from entering the quarter wave plate having much influence on the outside air, thereby improving the reliability of the projection system.

Hereinafter, an elcos panel assembly of a projection system according to the spirit of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a projection system according to the spirit of the present invention, Figure 2 is an exploded perspective view of a projection system display according to the present invention.

1 and 2, the projection system 1 according to the present invention includes a screen 2 on which an image is formed, a front panel 3 disposed below the screen 2, and a rear side of the screen. A back cover 4 is included.

In addition, a space provided between the screen 2 and the back cover 4 is provided with a separation plate 6 for dividing the projection space of the light and the accommodation space of the optical engine (see 10 in FIG. 3). In addition, a reflection mirror 5 is mounted on an inner surface of the back cover 4 so that the light projected from the optical engine 10 is reflected to the screen 2 to form an image.

In addition, the separation plate 6 is provided with a separation plate side opening 8 which communicates the projection space of the light and the accommodation space of the optical engine with each other, and the separation plate side opening 8 is air inside the optical engine 10. Aligned with the air inlet (7) which is the passage through which the internal air of the projection space of the light is introduced into the optical engine (10). The air introduced through the air inlet 7 is used as air for cooling the optical engine 10.

In FIG. 2, reference numeral 400 denotes a projection lens through which light is emitted from the optical engine 10, and the light emitted from the projection lens 400 is reflected toward the reflective mirror 5 and then reflected by the screen 2. ) To form an image.

3 is a perspective view of the optical engine of the projection system of the present invention, Figure 4 is a perspective view of the optical engine shown with the cover of the optical engine removed, the configuration and operation of the optical engine with reference to Figures 3 and 4 It will be described in detail.

The optical engine 10 includes an engine base 12 constituting the lower surface of the optical engine 10 and a plurality of parts placed on the upper surface of the engine base 12. In detail, an illumination system 200 for irradiating and refracting light, a synthesis system 100 for synthesizing an image of red-green-blue tricolor including an image signal by light emitted by the illumination system 200, and the synthesis system 100 Projection lens 400 to which the light is synthesized from the output is included.

In addition, power supply 350, which is not directly related to the formation of an image, may be further included, and fans 301 and 303 may be used to cool the heat generated by the optical engine 10. . At least an electronic ballast is formed in the power supply 350 to supply stable power to the lamp 201, and the fans 301 and 303 induce a forced flow of air to properly cool the optical engine 10. Serve

Each part of the above-described configuration will be described in detail for each part.

First, the illumination system 200 includes a lamp 201 operated as a light source, a first fly eye lens 231 and a second to improve the uniformity of the illumination light emitted from the lamp 201. Passing through the FEL 232, the Polarizing Beam Splitter (PBS) 233 disposed behind the second FEL 232, and the cells of the FEL 231, 232 A plurality of lenses 234, 235 and 236 for accurately projecting the light to the correct position of the Elcos panel, and a folding mirror for directing the traveling direction of the light source to the synthesis system 100; 237).

In detail, the PBS 233 uses a plurality of half-wave plates as a mechanism for converting all the light including the P-wave light of the illumination light into the S-wave, and the FEL 231 and 232 use the PBS 233. Let light enter the correct position. The illumination light includes a P wave, which is a Y-axis wavelength, and an S-wave, which is an X-axis wavelength, as the direction perpendicular to the traveling direction of the light, but the light of the P wave incident on the synthesis system 100 is a S wave by the PBS 233. After conversion, all the light is incident to the synthesis system 100 in the state of S wave. Therefore, it is possible to obtain the advantage that the utilization efficiency of the light is improved because the P-wave light which can be removed is used.

In detail, the folding mirror 237 is a mechanism that allows the light to be incident toward the synthesis system 100 by bending the illumination direction 90 degrees, and the inclination angle of the left, right, up, and down directions is adjusted so that the traveling direction is accurately adjusted. It is preferred that a predetermined mechanism is provided to which is adjusted.

In addition, each component of the illumination system 200 is seated on the illumination system housing 220 fixed to the engine base 12, the cover 210 is covered after each component is placed in the interior of the illumination system housing 220 The internal parts are protected from external shocks, and foreign material is prevented from entering into the illumination system 200. In addition, a hole 211 is formed at a predetermined position of the cover 210, and the hole 211 has heat generated in the internal space of each component constituting the illumination system 200 and the illumination system 200 due to natural convection. To be discharged to the outside. Although one through-hole 211 is formed in the figure, a plurality of holes may be formed as necessary. Preferably, at least the through hole 211 is formed above the PBS 233 so that the high heat generated in the PBS 233 is elevated by natural convection to be discharged to the outside.

In the synthesis system, the S-wave light is incident on each Elcos panel after being separated by wavelength, and is reflected by the Elcos panel and synthesized in a state in which an image signal is included and then through the projection lens 400. It is emitted. The detailed configuration of the synthesis system 100 will be described in detail later.

The cooling system of the optical engine in which the optical engine 10 is cooled will be described in detail.

The optical engine 10 has two fans 301 and 303 for forcing the air to flow and a plurality of guide structures for guiding the flow of air by the fans 301 and 303. The cooling system of the optical engine will be described based on the flow order of air.

First, the cool air accommodated in the space between the screen 2 and the back cover 4, that is, the projection space of the light, is introduced into the optical engine 10 through the air inlet 7. The air inlet 7 is formed in the cold air inlet guide 11 fixed to the side wall of the synthesis system 100. The cold air inlet guide 11 is introduced into the side of the synthesis system 100 by bending the advancing direction of the synthesis system 100, that is, laterally, after the air is introduced from above through the air inlet 7. The air introduced into the synthesis system 100 flows into the first fan 301 after cooling the heat inside the synthesis system 100.

The suction guide 302 is enclosed in an adjacent outer side of the first fan 301 so that the air introduced into the synthesis system 100 smoothly flows out. In addition, the air discharged from the first fan 301 is discharged to the power supply 350 to cool the heat generated by the power supply 350.

As can be seen from the structure as described, the cooling system by the first fan 301 allows the sound pressure provided from the first fan 301 to be transmitted to the synthesis system 100 and the cold air inflow guide 11. The air of the light projection space is made to be sucked through the separator side opening 8.

In addition, the lamp 201 is formed in the second fan 303 on the side of the lamp 201 to cool. The second fan 303 includes air in the vicinity of the power supply 350, which includes air discharged from the first fan 301. The projection system 1 after the air flows into the lamp 201 side. To be discharged to the rear.

As can be seen from the above-described structure, the first fan 301 and the second fan 303 are seated in a position adjacent to where the heat source is placed to provide a suction force, so that cold air absorbs heat after passing through the heat source and It consists of a structure to be sucked into the fan 301, 303 and discharged.

5 is a perspective view of a synthesis system in the projection system according to the present invention, and FIG. 6 is a view illustrating the structure and operation of the synthesis system, and the structure and operation of the synthesis system 100 will be described in detail with reference to the drawing.

Referring to FIG. 5, the synthesis system 100 is a portion in which S-wave light is separated and synthesized to form an image. A plurality of quads and an elcos panel assembly are provided.

In detail, the synthesis system 100 includes three quads 121, 122 and 123, a quad housing 110 supporting the quads, and a single notch filter for removing unnecessary yellow light from S-wave light. notch filter 131, a dichroic mirror 132 that transmits blue light and reflects green and red light, and is fixed to the sides of the quads 121, 122, and 123 so that the color of red green blue Three liquid crystal on silicon panel assemblies 150, 160, 170, which are liquid crystal panels each forming an image, are included. The elcos panel assembly is formed in a structure adjacent to the surface of the quads 121, 122 and 123 at a predetermined position of the quad housing 110, so that light incident from the quads enters the correct position of the elcos panel. Be sure to

Of course, a plurality of filters, polarizers, etc., which are not shown in FIG. 5, are further included, and the operation of the synthesis system will be described with reference to FIG. 6.

Referring to FIG. 6, unnecessary yellow light is reflected and removed from the S-wave light incident on the single notch filter 131, and then incident on the dichroic mirror 132, and by the dichroic mirror 132. Blue light is transmitted and red and green light are reflected. Hereinafter, the progress of light will be described in detail in the order of blue light, red light, and green light.

First, the S-wave blue light transmitted through the dichroic mirror 132 first passes through the second reflective polarizer 133 to improve the purity of the S-wave. In other words, since the second reflective polarizer 133 only passes the light in the same direction as the optical axis of the S-wave blue light and filters light having the optical axis in the other direction, the S-wave purity is improved in the illumination light. You can get it.

Thereafter, the light reflected from the third quad 123 is incident to the third elcos panel assembly 170. The quad is a beam splitter that operates to reflect S-wave light and transmit P-wave light.

Subsequently, the light is incident on the third quarter wave plate 171 and the linearly polarized light is changed into circularly polarized light, and then is incident on the blue Elcos panel 173 to be converted into P-wave blue light in the state containing the blue image image and reflected therein. . Although the P-wave blue light is incident to the third quad 123 again, the P-wave blue light is transmitted through the third quad 123 as it is P-wave blue light.

Thereafter, the light is incident on the third birefringent polarizer 137, polarized by 1/2 wavelength, and converted into S-wave blue light, and then incident on the first quad 121. The birefringent polarizing plate is a polarizing plate which allows light to be polarized selectively. The birefringent polarizing plate may have a function of changing the arrangement state of the birefringent material for each wavelength of light. Here, the third birefringent polarizer 137 is a birefringent polarizer to polarize 1/2 wavelength to blue light.

Subsequently, the S-wave blue light incident on the first quad 121 is reflected by the first quad 121 because it is S-py, and then enters the projection lens 400.

In addition, the S-wave red light reflected by the dichroic mirror 132 passes through the first reflective polarizer 134 to improve S-wave purity, and then passes through the first birefringent polarizer 135 to P-wave red light. Is changed. The first birefringent polarizing plate 135 is a polarizing plate using a birefringent material and polarizing red light at a half wavelength.

Thereafter, the second quad 122 is incident to the second quad 122. Since the incident light is P-wave red light, the second quad 122 passes through the second quad 122 as it is and then enters the first elcos panel assembly 150.

Subsequently, the first quarter wave plate 151 is converted into circularly polarized light, and then enters the red Elcos panel 175, and is converted into S-wave red light in the state containing a red image image and reflected therein, and the S-wave. Is reflected by the second quad (122).

Thereafter, the light is incident on the second birefringent polarizer 136 and is incident on the first quad 121 in a state in which the wavelength is polarized by 1/2 and changed into P-wave red light. Since the P-wave red light incident on the first quad 121 is P-py, it passes through the first quad 121 and is directed toward the projection lens 400.

In addition, the S-wave green light reflected by the dichroic mirror 132 passes through the first reflective polarizer 134 to improve the S-wave purity, and then passes through the first birefringent polarizer 135 as it is. Since the first birefringent polarizing plate 135 polarizes only red light by 1/2 wavelength as a polarizing plate using a birefringent material, it does not polarize green light.

Thereafter, the second quad 122 is incident to the second quad 122, and since the incident light is S-wave green light, the second quad 122 is incident on the second elcos panel assembly 160 after being reflected by the second quad 122.

Subsequently, the second quarter wave plate 161 is converted into circularly polarized light, and then enters the green Elcos panel 174, is changed into P-wave red light in the state including the green image image, and is reflected. Since it is a red light of, it passes through the second quad 122 as it is.

Thereafter, the second birefringent polarizing plate 136 is transmitted as it is and is incident to the first quad 121 without P-polarized blue light without polarization. The second birefringent polarizer 136 is changed by 1/2 wavelength only with respect to red and blue, and does not polarize green. The P-wave red light incident on the first quad 121 passes through the first quad 121 and is incident on the projection lens 400 because it is a P pie.

As described, red and green are incident to the projection lens in the P-wave state, and blue are incident to the projection lens 400 in the S-wave state. Subsequently, the light is emitted from the projection lens 400 and then reflected by the reflective mirror 5 to form an image on the screen 2. In this case, since the viewer views the image without detecting whether the light of the image is a P wave or an S wave, the viewer does not affect the viewing at all.

As described above, the three-color light including the red, green, and blue three-color images are synthesized and output through the projection lens 400. If the respective lights are not matched at the correct position, the image is distorted or the correct color is not. Will not be implemented. Therefore, the matching process for each Elcos panel is further proceeded.

On the other hand, the quarter wave plate is a mechanism for converting the light incident on the Elcos panel from linearly polarized light to circularly polarized light to improve the overall contrast ratio of the optical system, the contrast ratio is lowered when the optical axis of the polarized light is not matched, Color deterioration occurs. In addition, when foreign matter enters the quarter wave plate and the quarter wave plate or the elcos panel is contaminated by the foreign matter, it is as described above that the image formed on the screen 2 becomes a different color. . The present invention is characterized by proposing an Elcos panel assembly that can improve the above problems.

7 is a perspective view of an elcos panel assembly according to the present invention, Figure 8 is an exploded perspective view of an elcos panel assembly according to the present invention. In the following description, the first elcos panel assembly is described as an example, but it is obvious that the present invention may be similarly applied to other elcos panels.

Referring to FIGS. 7 and 8, the Elcos panel assembly 150 may include an Elcos panel 175 provided with liquid crystal, and a light for entering the Elcos panel 175 into circularly polarized light. Four wave plates 151 are shown.

As to prevent the inflow of foreign matter into the Elcos panel 175 and the quarter wave plate 151, a plurality of configurations are further added.

In detail, the panel support part 154 on which the elcos panel 175 is supported, the second sealer 157 interposed on a contact portion of the panel support part 154 and the elcos panel 175, and And a quarter wave plate holder 153 placed in front of the panel support 154 and placed in a state in which the quarter wave plate 151 is fixed so as to be relatively rotated with respect to the panel support 154. And a first sealer 152 placed in front of the quarter wave plate holder 153. Here, the second sealer 157 is for preventing foreign matter from flowing through the contact portions of the elcos panel 175 and the panel support 154. In addition, the quarter wave plate 151 is adhered to the quarter wave plate holder 153 by an adhesive such as silicon to prevent foreign matter from flowing through the contact surfaces of the quarter wave plate 151. In addition, the first sealer 152 is an article involved in the contact surface of the quarter wave plate holder 153 and the quad 122 to prevent foreign substances from being introduced through the contact portion.

The shape, structure, and operation of the first sealer 152 will be described in detail.

The first sealer 152 is provided with a predetermined thickness as a rectangular frame in which a rectangular opening through which light passes is formed. And, formed by the thickness of the front of the elcos panel assembly 150, the contact portion is sealed when the Elcos panel assembly 150 is fastened to the quad 122 side to prevent foreign matter flow through the contact portion. Be sure to In addition, the first sealer 152 is elastically deformed when the rubber material is used to fasten the elcos panel assembly 150 to the quad so that no gap occurs in the contact portion.

In addition, the first sealer 152 is bonded to the quarter wave plate holder 153 by an adhesive exemplified by silicon, thereby forming the first sealer 152 and the quarter wave plate holder 153. Do not allow foreign material to enter through the contacts.

On the other hand, the 1/4 wave plate holder 153 and the panel support portion 154 are both in order to prevent foreign matter from flowing through the contact portion of the quarter wave plate holder 153 and the panel support portion 154. Is bonded. However, even when the both are bonded, the matching between the quarter wave plate 151 and the elcos panel 175 is adjusted after the matching between the quarter wave plate 151 and the elcos panel 175 is matched. There is a need to be, for this purpose, the adhesive is involved in the contact portion of the quarter wave plate holder 153 and the panel support 154 is used an epoxy-based adhesive with a long curing time.

A coupling relationship between the components constituting the Elcos panel assembly 150 will be described. An Elcos panel coupler 158 is formed at an edge of the Elcos panel 175, and the panel support 154 has a panel side fixing hole 159 at a position corresponding to the Elcos panel coupler 158. ) Is formed. By such a structure, a screw or the like is inserted into the Elcos panel coupler 158 and the panel side fixing hole 159 in a state where both are aligned, so that both can be firmly coupled.

In addition, a plurality of quad side fixing holes 162 are formed at the edge of the panel support part 154, and any article to which the quad side fixing holes 162 are fixed to the quad housing 110 or the quad 122 is fixed. In a state in which the fastening tool is fitted into the quad side fixing hole 162, the panel support 154 can be fixed with respect to the quad 122. In addition, in order to precisely match the three Elcos panel assembly 150, 160, 170, the position-variable structure as any structure to the connection structure of the quad 122 and the Elcos panel assembly 150 It may be possible to involve further rescue. The elbow panel assembly 150 may be adjusted with respect to the quad 122 by the variable position structure, and the elcos panel assembly 150, 160, 170 may be adjusted when the elbow panel assembly 150 is adjusted. Matching between course panels can be precisely matched.

On the other hand, by allowing the relative rotation of the quarter wave plate holder 153 relative to the panel support 154, the matching of the quarter wave plate 151 and the elcos panel 175 can be adjusted. A rotating structure is further provided to meet the requirements.

As the rotating structure, a guide protrusion 163 is formed at one side of the panel support 154, and a protrusion insertion hole 165 at a position of the quarter wave plate holder 153 corresponding to the guide protrusion 163. Is formed. The guide hole 164 is formed at the other side of the panel support 154, and the adjustment guide 166 is formed at the position of the quarter wave plate holder 153 corresponding to the guide hole 164. In addition, the handle 169 is extended to one side of the quarter wave plate holder 153 on which the adjustment guide 166 is formed so that the operator can rotate the quarter wave plate holder 153 while holding the handle. In addition, one side of the panel support 154 provided with the guide protrusion 163 is provided with a support side seating surface 168 having a curved shape, and a quarter corresponding to the support side seating surface 168. At the position of the wave plate holder 153, the holder-side seating surface 167 is similarly curved and formed.

In addition, the lower end of the adjustment guide 166 is bent so that when the body of the adjustment guide 166 is inserted into the guide hole 164, the end is caught on the back surface of the panel support 154 once 1/4 The wave plate holder 153 is not separated from the panel support 154.

According to the configuration described above, the quarter wave plate holder 153 is rotated to match an image. Even when the quarter wave plate holder 153 is rotated, the quad wave plate holder 153 is rotated with the quad by the first sealer 152. The gap between the elcos panel assemblies is completely sealed. As a result, even if the quarter wave plate holder 153 is rotated, the contact portion of the quad and elcos panel assembly is completely sealed, and foreign matter is introduced through the gap portion or contamination of the panel due to foreign matter inflow. There is no fear of it occurring.

The spirit of the present invention is not limited to the accompanying embodiments, and those skilled in the art who understand the spirit of the present invention can easily suggest other embodiments falling within the scope of the same idea by adding, changing, deleting, and adding components. It may be said that this is also included within the scope of the spirit of the present invention.

According to the present invention, foreign matters to the inside of the elcos panel assembly can be prevented, thereby preventing deterioration of the image. In particular, foreign matter is prevented from flowing through the contact portion of the elcos panel assembly and the quad, thereby preventing the deterioration of the image.

In addition, according to the present invention, since the contamination of the Elcos panel can be prevented by a simple structural change, there is an advantage in that the convenience in operation is improved.

Claims (5)

Elcos panel; A panel support part supporting the elcos panel from the front and fixed to the quad; A quarter wave plate holder placed in front of the panel support to support a quarter wave plate; And And a sealing member having a predetermined thickness in front of the quarter wave plate holder to seal the contact portion between the quarter wave plate holder and the quad. The method of claim 1, The sealing member is an elcos panel assembly of the projection system of rubber material. The method of claim 1, The sealing member is an elcos panel assembly of the projection system provided in the shape of a square frame. The method of claim 1, And the sealing member is attached to the quarter wave plate holder. The method of claim 4, wherein And said adhesive is silicone.

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