KR100693530B1 - Structure of light tunnel for dlp projection television - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light tunnel structure of a DLP projection television. The present invention relates to a light tunnel structure of a DLP projection television. In addition to securing the installation space of the base, foreign matters such as dust are minimized to prevent the inflow of foreign matters in advance, thereby providing a clear picture quality to the user.

Light tunnel, UV filter, integration, bonding, LP projection

Description

Light tunnel structure of DLP projection television {STRUCTURE OF LIGHT TUNNEL FOR DLP PROJECTION TELEVISION}

1 is a conceptual diagram showing a general structure of a DLP projection television.

2 is a perspective view showing a conventional light tunnel.

3 is an exploded perspective view showing a light tunnel according to the present invention.

4 is a plan view of a light tunnel according to the present invention.

5 is an exploded perspective view showing another embodiment of a light tunnel according to the present invention.

6 is an exploded perspective view showing another embodiment of a light tunnel according to the present invention.

Explanation of symbols on main parts of drawing

100, 300: tunnel portion 102: panel

104: reflective surface 106: front

120, 220: UV filter 224: fixed groove

302 panel 304 reflective surface

306: Extension

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to the structure of light tunnels in DLP (Digital Lighting Processing) projection televisions, and more particularly to a light tunnel structure that makes uniform the light projected from a lamp that produces strong light.

DLP is a new display method compared to LCD (LCD) liquid crystal display (LCD) projection system. It is a method of realizing high definition image quality by using light reflecting elements. In other words, it is a technology that expresses high brightness and high resolution images by selectively reflecting light using a device in which hundreds of thousands of reflective elements are integrated on one chip, and is processed through a projector, a cathode ray tube (CRT), and a liquid crystal display (LCD). Although it is an extension of the projection type display technology that has been developed, it has a characteristic of being reflective compared to the already available LCD projection system.

DLP-type projection television uses a digital device that determines the blocking and opening of light through a circuit board and reflects the light reflected on the surface of a number of fine digital micromirror devices (DMDs). Adjust the degree to implement the image. Therefore, there is no noise or image quality deterioration when converting a digital signal to an analog signal, and different characteristics are not corrected for each device, so that the original picture can be perfectly reproduced.

In addition, the response speed of the device is faster than the LCD and Plasma Display Pannel (PDP) methods, so it can be reproduced more smoothly and flexibly in moving images, and has a wide viewing angle to accommodate many viewers. It is simple and unaffected, making it easy to adjust and suitable for both front and rear projection applications.

This DLP projection television will be described based on FIG. 1. 1 is a conceptual diagram showing a general structure of a DLP projection television. Referring to the drawings, the configuration of the DLP projection television includes a lamp 10 through which light is generated, an integrator 30 through which light generated by the lamp 10 passes, and the integrator The color wheel 40 in which the white light passing through the color 30 is divided into RGB, the condensing lens 50 where the light passing through the color wheel 40 is collected, and the light passing through the condensing lens 50 The reflected prism 60, a DMD 70 for illuminating the light reflected by the prism 60 on the screen, and a projection lens 80 for enlarging the light reflected from the DMD 70.

In this case, the light is emitted from the lamp 10 generating the strong light to the integrator 30 to have a uniform surface light source. The strong light generated from the lamp 10 has ultraviolet rays. Since it has a thermal effect on the integrator 30, UV (Ultraviolet Rays) filter 20 is installed to filter the ultraviolet light before the strong light is incident on the integrator (30).

On the other hand, the integrator 30 is commonly used a light tunnel (Light Tunnel) or a light rod (Light Rod), the light tunnel 30, the mirror having a reflection surface on the inner four sides of the hollow square pillar Is installed, the light incident from the lamp 10 is made to be a uniform surface light source is irradiated with the color wheel 40. Here, the longer the length of the light tunnel 30 is, the more the number of diffused reflections and refractions increases, so that the emitted light becomes more uniform. Thus, an image signal projected on a screen (not shown) of a DLP-type projection television is obtained. The sharpness of is an important part that can be seen to be determined in the light tunnel (30).

2 is a perspective view showing a conventional light tunnel. Referring to the drawings, the mirror-shaped panels 32 face each other so that the light incident from the lamp 10 is refracted to be refracted by a mirror formed inside the hollow rectangular pillar to make a uniform surface light source. Is provided. Here, the panel has a very small shape having a length of 30 mm, a width of 6.2 mm, a length of 5.2 mm, and a thickness of 0.5 mm. Accordingly, each panel is provided in all directions to form a hollow light tunnel 30 having a square pillar. To form.

Looking at the support structure of the panel 32, the panel is positioned up and down so that the panels 32 are mutually supported, the bonding (34) across the end of the panel located on the left / right, and then the lamp 10 and the color It is seated in the optical engine base 90 between the wheels 40. Here, in order to stably fix the light tunnel 30 to the optical engine base 90, the one-piece spring 92 having elastic force is bonded to the surface where the optical engine base 90 and the light tunnel 30 are in contact with each other. It is supported on the outside of the tunnel 30.

However, the conventional bonding fixation of the light tunnel 30 as described above has a problem that it is very vulnerable to heat. Therefore, since the light generated in the lamp 10 carries strong heat, the portion 34 bonded by the heat incident on the lamp 10 is heated by the upper and lower panels bonded to the ends of the left and right panels. Since the fixed state of the panel 32 becomes poor and the light incident on the light tunnel 30 is different from the emission direction of the color wheel 40, a high quality image cannot be obtained.

Further, in this state, since the one-piece spring 92 for stably fixing to the optical engine base 90 continuously exerts an external force on the light tunnel 30, the light tunnel 30 collapses and the light tunnel 30 It is necessary to repair for replacement of the foreign matter, such as dust flows into the light tunnel 30, the light projected from the lamp 10 to generate a shadow, such as black spots when the light tunnel 30 is incident Since the uniform surface light source is not emitted to the color wheel 40, the terminal may not provide clear image quality to the user.

The present invention can be more firmly fixed when fixing the panels of the light tunnel to each other, and the light tunnel of the DLP projection television that is integrally formed with the UV filter that filters the ultraviolet rays generated from the lamp can support the panel The purpose is to provide a structure.

It is also an object of the present invention to provide a light tunnel structure of a DLP projection television that can emit a uniform surface light source to the color wheel by minimizing a portion where foreign matter can be introduced to prevent foreign material from entering the light tunnel.

Accordingly, the light tunnel is firmly supported and is integrally formed with the yuv filter provided in the front of the light tunnel, so that the space required for the installation of the light tunnel and the yuv filter can be easily secured.

Light tunnel structure of the DLP projection television according to the present invention for achieving the above object is a tunnel portion is formed by combining a plurality of panels coupled in a direction facing each other to refracting the light generated from the lamp; And A yuv filter integrally fixed to an end of the tunnel portion; and a portion where the panel contacts the panel and a portion where the tunnel portion contacts the yuv filter are bonded to each other so that the tunnel portion is stably fixed. It is done.
In another aspect, a light tunnel structure of a DLP projection television according to the present invention includes a tunnel portion including a plurality of panels coupled in a direction in which reflection surfaces that refract light generated from a lamp face each other; A yuv filter is integrally fixed to the end; includes, the yuv filter is characterized in that the fixing groove for inserting the tunnel portion is formed.
In another aspect, a light tunnel structure of a DLP projection television according to the present invention includes: a tunnel unit including a plurality of panels coupled in a direction in which reflective surfaces that refract light generated from a lamp face each other; A UV filter fixedly integrated at an end of the tunnel portion; And an extension part extending to an end of the panel on the side where the yub is in close contact with the filter so that the yuv filter is firmly coupled to the tunnel portion.

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

3 is an exploded perspective view showing a light tunnel according to the present invention, Figure 4 is a plan view of a light tunnel according to the present invention. Referring to the drawings, the light tunnel is formed with a panel 102 having a mirror having a reflecting surface 104 to reflect the light projected from the lamp 10 to be refracted to a uniform surface light source. The panel 102 has a very small shape having a length of 30 mm, a width of 6.2 mm, a length of 5.2 mm, and a thickness of 0.5 mm.

In addition, the panel 102 is provided on all sides and the tunnel portion 100 having the shape of a hollow hollow pillar is formed so that the reflective surface 104 of the panel 102 is provided in all directions. The incident surface into which the light generated by the incident light is incident, and the exit surface onto which the light entering the incident surface is refracted by the reflective surface and projected onto the color wheel 40 are configured.

In addition, a UV filter 120 for filtering ultraviolet rays from the light generated by the lamp 10 and projecting the ultraviolet rays to the incident surface of the tunnel part 100 is fixed to the front surface 106 of the tunnel part 100.

In more detail, the upper panel 102a and the lower panel 102b are provided to face the reflective surfaces 104 to support the panels 102, and the upper panel 102a and the lower panel 102b are provided. The left panel 102c and the right panel 102d are bonded to each other by the left and right ends of the adhesive. The end of the upper panel 102a is about 0.25 mm corresponding to half of the ends of the left / right panels 102c and 102d. It is seated and bonded. In addition, since the ends of the lower panel 102b are also seated about 0.25 mm corresponding to half of the left and right panels 102c and 102d, the area bonded by the adhesive is extremely small.

Therefore, a UV filter 120 for filtering the ultraviolet rays generated from the light of the lamp 10 on the front surface of the tunnel part 100, that is, the entrance surface where the light projected from the lamp enters the tunnel first enters the adhesive. Once again bonded and firmly supported.

Here, the UV filter 120 has a shape of a prism that refracts only ultraviolet rays not to be incident on the tunnel part 100. In particular, the bottom surface of the prism shape and the front surface of the tunnel part 100 are bonded once again. As it is supported, it is fixed stably.

As described above, the tunnel part 100 fixed by the UV filter 120 is seated on the optical engine base 90, and then the surface where the tunnel part 100 and the optical engine base 90 contact each other by adhesive. Bonding. In addition, the light tunnel fixed to the optical engine base 90 is once again fixed by the piece spring 92.

In the light tunnel having the above structure, after the upper panel 102a and the lower panel 102b are bonded and fixed to the left panel 102c and the right panel 102d by the adhesive, the upper panel 102a, The front panel 106 of the lower panel 102b, the left panel 102c, and the right panel 102d can be firmly fixed because the yub is once again bonded and fixed by an adhesive to the filter 120.

In addition, the UV filter 120 installed between the lamp 10 and the light tunnel is integrated with the light tunnel, so that the space can be easily secured when the light tunnel is installed in the optical engine base 90. The UV filter 120 is fixed to the front surface 106 to minimize the portion of the foreign matter that can enter the light tunnel to emit a uniform surface light source to the color wheel 40.

Meanwhile, the front surface 106 and the UV filter 120 of the light tunnel may be fixed without being bonded by an adhesive, which will be described with reference to FIGS. 5 and 6.

5 is an exploded perspective view showing another embodiment of a light tunnel according to the present invention. Referring to the drawings, the front surface 106 of the light tunnel may be fixed to the UV filter 220, the horizontal side of the panel 102 on the surface of the UV filter 220 is located, An uneven fixing groove 224 corresponding to the vertical length is formed to fix the front surface 106 of the light tunnel.

Here, the fixing groove 224 formed in the UV filter 220 is very natural that the panel 102 is provided in all directions so that the light projected from the lamp 10 does not leak out.

6 is an exploded perspective view showing another embodiment of a light tunnel according to the present invention. Referring to the drawings, an extension 306 is formed to extend an adhesive surface on the front surface of the light tunnel, that is, the panel 302 bonded with the UV filter 120. In addition, the reflective surfaces 304 of the panel 302 having the extension part 306 are provided in all directions so as to face each other to form a hollow rectangular pillar, and the panels 302a and 302b provided vertically and horizontally. The portion where the panels 302c and 302d provided are bonded to each other to form a tunnel portion 300, and an adhesive is applied to the extension portion 306 formed on the front surface of the tunnel portion 300 to bond the UV filter 120. do.

Therefore, when the extension part 306 is formed in the panel 302, the area where the adhesive for fixing the panel and the panel is applied is extended by the amount, so that the front surface of the tunnel part 300 is connected to the UV filter 120. When bonded, it is possible to secure a stable support area, and thus the fixing of the yuv filter 120 and the tunnel 300 becomes more robust.

The light tunnel reinforcement structure of the DLP projection television according to the present invention forms a hollow rectangular pillar by bonding a portion where the panel provided at the top and the bottom and the panel provided at the left and right are joined by an adhesive. The front side is once again bonded to the yuv filter to make it more rigid.

In addition, the UV filter and the light tunnel are integrated to secure an installation space of the optical engine base on which the light tunnel and the UV filter are installed.

In addition, the front of the light tunnel having a hollow rectangular pillar shape is blocked by the UV filter to minimize the portion where foreign matter can enter the light tunnel, thereby preventing black spots and shadows caused by the foreign material in advance. Since one surface light source can be emitted to the color wheel, it can provide a clear picture quality to the user.

On the other hand, the present invention is not limited only to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, the technical idea that such modifications and variations are also included in the claims Should be seen.

Claims (6)

Tunnel portion is formed by combining a plurality of panels coupled in the direction in which the reflection surface for refracting the light generated by the lamp facing each other; And It includes; yuv filter is integrally fixed to the end of the tunnel portion, And a portion where the panel is in contact with the panel and a portion where the tunnel portion is in contact with the UV filter are bonded to each other so that the tunnel portion is stably fixed. delete delete The method of claim 1, The UV filter is a light tunnel structure of a DLP projection television having a prism shape. Tunnel portion is formed by combining a plurality of panels coupled in the direction in which the reflection surface for refracting the light generated by the lamp facing each other; And It includes; yuv filter is integrally fixed to the end of the tunnel portion, The UV filter is a light tunnel structure of the LP projection television, characterized in that the fixing groove for inserting the tunnel portion is formed. A tunnel portion having a plurality of panels coupled to each other in a direction in which reflective surfaces for refracting light generated from a lamp face each other; A UV filter fixedly integrated at an end of the tunnel portion; And And an extension part extending to an end portion of the panel on the side where the yub is in close contact with the filter so that the yuv filter is firmly coupled to the tunnel part.

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