KR100727152B1 - Structure of light tunnel for dlp projection television - Google Patents

Abstract

The present invention relates to a light tunnel fixing structure of a DLP projection television, and includes: a light tunnel in which a panel and an end portion of the panel are bonded so that panels formed with mirrors with inner diameters face each other, and the light tunnel is mounted on an optical engine base. The light tunnel fixing structure of the DLP projection television includes a support bracket having a concave seating surface for fixing and a fixing piece fixed to the support bracket and having an entrance hole into which a front outer diameter of the light tunnel into which light is incident is inserted. As a result, the panel and the panel can be firmly fixed to the light tunnel supported by the bonding, and heat can be concentrated in the light tunnel, thereby preventing the bonded panel from being collapsed.

Light Tunnel, Panel, Bonding, DL Projection, Support Bracket

Description

Light tunnel fixed 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 fixing structure.

3 is an exploded perspective view showing the fixing structure of the light tunnel according to the present invention.

Figure 4 is a perspective view showing a state in which the fixing piece according to the invention mounted in the light tunnel.

5 is a cross-sectional view taken along line II ′ of FIG. 4.

6 is a perspective view showing another embodiment of the fixing piece according to the present invention.

7 is a cross-sectional view illustrating a state in which the fixing piece of FIG. 6 is mounted in a light tunnel.

Explanation of symbols on main parts of drawing

10 lamp 20 UV filter

30: light tunnel 32: panel

34: support bracket 36: seating surface

100: fixed piece 110: extension piece

112: fastening hole 120: entrance hole

122: bending surface 130: fastening member

140: UV blocking film

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light tunnel fixing structure of a DLP (Digital Lighting Processing) projection television. In particular, the present invention relates to a light tunnel fixing structure that stably supports a light tunnel that uniforms the light projected from a lamp in which strong light is generated. A light tunnel fixing structure of a DLP projection television capable of uniformly dispersing the temperature of the light tunnel so as to prevent the light tunnel from being heated and collapsed by high temperature 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 steadily in moving images, and the wide viewing angle can 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 for generating light, an ultraviolet cut filter 20 for blocking ultraviolet rays among the light generated by the lamp, and the lamp 10. The integrator 30 through which the light generated by the light passes, the color wheel 40 where the white light passing through the integrator 30 is color-divided into RGB, and the light passing through the color wheel 40 are collected. A condensing lens 50, a prism 60 through which light passing through the condensing lens 50 is reflected, a DMD 70 illuminating the light reflected by the prism 60 on a screen, and the DMD And a projection lens 80 for enlarging the light reflected from 70.

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 that is reflected on a screen (not shown) of a DLP type projection television is finally 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 fixing structure. 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 panel 32 is mutually supported, the bonding 31 across the end of the panel located on the left / right, and then the lamp 10 and the color It is seated in an optical engine base (not shown) between the wheels 40.

Here, a seating surface 36 having a concave groove is formed to secure the light tunnel 30 to the optical engine base in a stable manner, and a separate fastening member is formed on the optical engine base. The light tunnel is fixed by the support bracket 34 fixed thereto.

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 31 bonded by the heat incident on the lamp 10 is heated by the upper / lower panel bonded to the end of the left / right panel. Since the panel 32 collapses and the light incident on the light tunnel 30 is different from the emission direction of the color wheel 40, it is impossible to obtain a high quality image.

The present invention can be more firmly fixed when fixing the panels of the light tunnel to each other, and the light tunnel is heated by the light generated from the lamp to disperse heat concentrated in the light tunnel so that the bonded panels do not collapse It is an object of the present invention to provide a light tunnel fixing structure of a DLP projection television that can stably support the panel.

According to the technical idea of the present invention for achieving the above object, a light tunnel in which the panel and the end of the panel are bonded to each other so that the mirror-shaped panels facing each other are provided on all sides, and the light tunnel to the optical engine base The light tunnel fixing structure of the DLP projection television includes a support bracket having a concave seating surface for fixing and a fixing piece fixed to the support bracket and having an entrance hole into which a front outer diameter of the light tunnel into which light is incident is inserted. Is achieved by.

Here, the fixing piece is preferably provided over the entire surface of the support bracket so that light is incident only to the inner diameter of the light tunnel.

In addition, the fixing piece is preferably further provided with an extension piece bent to be fixed to the support bracket.

On the other hand, in another technical idea of the present invention for achieving the above object, the light tunnel and the end of the panel is bonded to the light tunnel and the outer diameter of the light tunnel so that the mirror-shaped panels facing each other and provided in all directions to the inside diameter It is achieved by the light tunnel fixing structure of the DLP projection television that includes a fixing piece provided on the front side of the light tunnel to block the projection of light.

In addition, the panel and the panel preferably includes a fixing piece provided with an entrance hole corresponding to the front outer diameter of the light tunnel provided to face each other.

In addition, it is preferable to further include a fixing piece which is in contact with the light tunnel in multiple directions so that the temperature of the light tunnel heated by the high temperature light can be uniformly dispersed.

In addition, it is preferable to further include a fixing piece provided with an ultraviolet blocking film to block ultraviolet rays of light incident to the light tunnel.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected about the part same as a conventional structure among the content of this invention.

3 is an exploded perspective view showing a fixing structure of the light tunnel according to the present invention, Figure 4 is a perspective view showing a state in which the fixing piece according to the present invention is mounted to the light tunnel. Referring to the drawings, the fixing structure of the light tunnel is large, a light tunnel 30 into which light is incident from the lamp 10, and a support bracket to which the light tunnel 30 is seated and fixed to the optical engine base. (34) and a fixing piece which blocks the light incident to the outer diameter of the light tunnel 30 among the light incident on the light tunnel 30, and fixes the light tunnel 30 to the support bracket 34 ( 100).

In the light tunnel, a panel 32 having a mirror having a reflective surface 32a is formed to reflect and refract the light projected from the lamp 10 into a uniform surface light source. The panel 32 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.

The light tunnel 30 has a panel and an end portion of the panel bonded to each other such that the panel 32 is provided in all directions and has a hollow quadrangular pillar such that the reflective surface 32a of the panel 32 is provided everywhere. In addition, the front surface of which the light generated by the lamp 10 is incident is formed, and the light entering the incident surface is refracted by the reflection surface and the rear surface is projected to the color wheel 40.

In order to install the light tunnel 30 as described above, the support bracket 34 is provided, and the support bracket 34 is recessed so that the light tunnel 30 can be stably supported and seated. The grooved mounting surface 36 is provided, and the support bracket 34 is installed in the optical engine base, so that the light emitted from the lamp 10 passes through the light tunnel 30 to create a uniform surface light source. .

In addition, the fixing piece 100 is provided on the front surface where light is incident on the light tunnel 30 so as to fix the light tunnel 30 to the support bracket 34. 30) is in close contact with the front of the support bracket 34 is seated. Here, the fixing piece 100 is formed with a larger area than the outer diameter of the light tunnel 30, the entrance hole 120 is formed so that the front surface of the light tunnel 30 can be inserted into the fixing piece 100. .

In addition, the extension piece 110 bent from the fixing piece 100 is extended to one side of the support bracket 34 to fix the fixing piece 100 and the support bracket 34 by the fastening member 130. In particular, a bent surface 122 is provided in the entrance hole 120 corresponding to the outer diameter shape of the light tunnel 30 in the fixing piece 100, so that the outer diameter of the light tunnel 30 is formed in the entrance hole 120. It can be inserted and supported.

The operation of the light tunnel fixing structure as described above will be described with reference to FIG. 5. 5 is a cross-sectional view taken along line II ′ of FIG. 4. Referring to the drawings, the light tunnel 30 is stably supported by the support bracket 34 and fixed to block light incident to the outer diameter of the light tunnel 30 among the light incident from the lamp 10. Bar 100 is provided on the front of the light tunnel 30, the fixing piece 100 is provided with an entrance hole 120 corresponding to the outer diameter of the light tunnel 30, the incident from the lamp 10 The light is incident only to the inner diameter of the light tunnel 30, and blocks the light incident to the outer diameter of the light tunnel 30.

In addition, since the light tunnel 30 and the fixing piece 100 come into contact in multiple directions, the temperature of the light tunnel 30 heated by the high temperature light is conducted to the fixing piece 100, while the fixing piece ( The extension piece 110 of the 100 and the support bracket 34 are tightly fixed, so that the heat of the light tunnel 30 is conducted to the support bracket 34 through the fixing piece 100, so that the temperature of the light tunnel 30 is maintained. Will be distributed uniformly.

Meanwhile, an ultraviolet blocking film may be provided to block ultraviolet rays from light incident to the fixing piece 100 among the light incident to the light tunnel 30. The ultraviolet blocking film is to prevent the fixing piece 100 from heating by blocking ultraviolet rays among the light incident on the fixing piece 100.

On the other hand, as another embodiment, the fixing piece provided on the front of the light tunnel, may be provided on the back of the light tunnel. This will be described with reference to FIGS. 6 and 7. Referring to the drawings, after the light tunnel 30 is provided on the seating surface 36 of the support bracket 34, the light tunnel 30 can be fixed to the support bracket 34. The fixing piece 100 is provided on the front and rear surfaces at which light enters and exits the 30, and the fixing piece 100 closely adheres to the front and rear surfaces of the support bracket 34 on which the light tunnel 30 is seated. Done.

Here, the fixing piece 100 provided on the front and rear of the light tunnel 30 is formed in a larger area than the outer diameter of the light tunnel 30, the front and rear of the light tunnel 30 on the fixing piece 100 The insertion hole 120 is formed to be matched with the insertion hole 120. The entrance hole 120 is formed with a bent surface 122 to be inserted into and supported by the outer diameter of the light tunnel 30, and the fixing piece 100 The outer diameter of the light tunnel 30 is matched. In addition, the extension piece 110 connecting the fixing piece 100 on the front and the fixing piece 100 on the back is fixed to the fixing piece 100 and the support bracket by the fastening member 130 to one side of the support bracket 34. 34 is fixed.

In addition, the fixing piece 100 provided on the front surface of the light tunnel 30 may further include a UV blocking film 140. Since the largest factor of raising the temperature of the light tunnel 30 is that the temperature of the light tunnel 30 is increased by ultraviolet rays among the light incident from the lamp 10 to the light tunnel 30, the lamp 10 and Ultraviolet rays of the fixing piece 100 provided on the front of the light tunnel 30 to the ultraviolet rays included in the light incident to the light tunnel 30 can not be filtered by the ultraviolet cut filter 20 installed between the light tunnel 30 The blocking layer 140 is filtered once again to suppress the temperature rise of the light tunnel 30.

In addition, the inlet 120 of the fixing piece 100 is inserted into the front and rear of the light tunnel 30, the extension piece 110 for connecting the fixing piece 100 and the rear fixing piece 100 of the front. ) Is fixed to the support bracket 34 by the fastening member, so that the light tunnel 30 can be fixed to the support bracket 34 more reliably.

The light tunnel fixing structure of the DLP projection television according to the present invention can be more securely fixed to the light tunnel supported by the panel and the bonding by being inserted into the fixing piece provided with the entrance hole corresponding to the front surface of the light tunnel. Will be.

In addition, even if the temperature of the light tunnel rises due to the light incident from the lamp, the heat of the light tunnel is conducted to the fixed piece, which is released to the support bracket to maintain the temperature of the light tunnel uniformly, concentrating heat in the light tunnel. Thus, the bonded panel can be prevented from collapsing.

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 (7)

A light tunnel in which the panel and the end of the panel are bonded so that the mirror-shaped panels facing each other are provided in all directions; A support bracket having a concave seating surface to fix the light tunnel to the optical engine base; And And a fixing piece fixed to the support bracket and having an entrance hole into which a front outer diameter of the light tunnel into which light is incident is inserted. The method of claim 1, And the fixing piece is provided over the front surface of the support bracket such that light is incident only to the inner diameter of the light tunnel. The method according to claim 1 or 2, And an extension piece that is bent from the fixing piece and fixed to the support bracket. A light tunnel in which the panel and the end of the panel are bonded so that the mirror-shaped panels facing each other are provided in all directions; And And a fixing piece provided on the front surface of the light tunnel to block light from being projected to the outer diameter of the light tunnel. 2. The method of claim 4, wherein The fixing piece is provided with a light tunnel fixed structure of the LP projection television, characterized in that the inlet is provided to match the outer diameter of the front of the light tunnel. The method of claim 5, And the fixing piece is in contact with the light tunnel in multiple directions so as to uniformly disperse the temperature of the light tunnel heated by the light. The method according to any one of claims 4 to 6, The fixing piece has a light tunnel fixing structure of a DLP projection television, characterized in that the UV blocking film for blocking the ultraviolet light of the light incident to the light tunnel.

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