KR200156674Y1 - Liquid projector - Google Patents

Abstract

The present invention relates to a liquid crystal project in which the structure of a liquid crystal support on which a liquid crystal display panel is fixed is improved.

The liquid crystal support body is a bolt which is a fastening means for joining the first bracket to which the liquid crystal panel is attached, the second bracket to be fastened to the lens support part on which the lenses disposed in front and / or behind the liquid crystal panel are installed, and the first bracket and the second bracket. And a spring, the surface treatment of which the substrates come into contact with each other by the fine adjustment of the liquid crystal project, since the liquid crystal panel can be adjusted by adjusting the bolt so as to fit the optical arrangement with respect to the lenses having an optical arrangement relationship with the liquid crystal panel. By correcting manufacturing errors such as defects, flexibility in assembly manufacturing is provided.

Description

Liquid crystal projector with support of liquid crystal display panel with improved structure

1 is a schematic cross-sectional view of a general rear-projection liquid crystal projector.

2 is a cross-sectional view of a structure in which the liquid crystal support of FIG.

3 is an exploded perspective view of the liquid crystal support according to the present invention.

4 is a cross-sectional view of a structure in which the liquid crystal support of FIG. 3 is combined with a lens support.

* Explanation of symbols for main parts of the drawings

1: light source 2,12: liquid crystal display panel

3: Projection lens unit 4: Reflector

5: screen 6: liquid crystal support

7, 8, 17, 18: lens support 13: the first bracket

14: second bracket 15: spring

16: bolt

The present invention relates to a liquid crystal project in which the structure of a liquid crystal support on which a liquid crystal display panel is fixed is improved. A liquid crystal projector is a system of projecting light onto a liquid crystal panel (LCD), which is an image generating module, to generate an image, and magnifying the image through an optical lens to project the image onto a large screen.

FIG. 1 is a schematic cross-sectional view of such a liquid crystal projector.

The operation of the liquid crystal projector will be briefly described with reference to the drawings.

First, the optical path is deflected so that the light emitted from the light source 1 becomes parallel light using optical means, and the parallel light is projected onto the liquid crystal display panel 2. In the liquid crystal display panel 2, both electrodes are arranged in a matrix after liquid crystal charging to form pixels. When a voltage is applied to the electrode of the liquid crystal panel 2 selected to realize the desired image, an image is generated by selectively transmitting the incident light in the liquid crystal to which the voltage is applied. The image generated from the liquid crystal display panel 2 is magnified by the projection lenses 3a, 3b, and 3c, and the enlarged image is projected onto the screen 5 by the reflector 4.

In such a liquid crystal projector, if a slight difference occurs in the optical arrangement between the components during fabrication, it directly affects the sharpness of the image formed on the screen 5.

An enlarged cross-sectional view of part A of the support structure A for fixing the optical arrangement between the liquid crystal panel 2 and the lenses 3c and 3d arranged before and after the liquid crystal panel 2 of the components constituting the liquid crystal projector is shown in FIG. It was.

As shown, the optical alignment of the lenses 3c and 3d and the liquid crystal display panel 2 includes a liquid crystal support 6 on which the liquid crystal panel 2 is fixed and two lens supports on which the lenses 3c and 3d are fixed. The lens support portion consisting of (7, 8) is formed by fastening the bolts to the screw grooves formed on the respective supports and supporting each other. The three supports 6, 7 and 8 are connected to and fixed with the structure 10 (see FIG. 1) in which components having an optical arrangement relationship with the liquid crystal panel 2 and the lenses 3c and 3d are installed. When the structure 10 is finally connected to the main body, the structure 10 is stably maintained in external vibration, shock, and the like.

The optical arrangement of the liquid crystal panel 2 and the lenses 3c and 3d is determined from the coupling structure of the liquid crystal support 6 and the lens supports 7 and 8. Therefore, in the coupling structure shown, the spacing between supports is poor when the surface treatment of each support in contact with each other is poor, or when the force applied to the bolts inserted into the respective screw grooves when the respective supports are joined by bolts is differentially applied. This nonuniformity causes the optical arrangement between the liquid crystal panel 2 and the lenses 3c and 3d to be distorted.

According to the optically twisted structure, the distribution of light focused on the liquid crystal panel by the lens or the angle of incidence of the light incident on the light receiving surface of the liquid crystal panel is varied, and finally, the image quality of the image displayed on the screen 5 is distorted. There is a problem.

The present invention has been made to solve the above problems, and an object thereof is to provide a liquid crystal project in which the support of the liquid crystal display panel is improved to adjust the arrangement of the liquid crystal display panel on the support of the liquid crystal display panel.

In order to achieve the above object, a liquid crystal project according to the present invention includes a liquid crystal support on which a liquid crystal display panel is installed, a lens support on which lenses disposed in front and / or behind the liquid crystal display panel are installed, and an optical arrangement of the lens and the liquid crystal display panel. In a liquid crystal project in which the liquid crystal support and the lens support are coupled by a predetermined coupling means to fix the liquid crystal support, the liquid crystal support may include a first bracket to which the liquid crystal display panel is attached, a second bracket to be fastened to the lens support, and the second bracket. It characterized in that it comprises a fastening means for fastening the first bracket and the second bracket at a predetermined interval apart.

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

Figure 3 shows an exploded perspective view of the liquid crystal support of the liquid crystal projector according to the present invention, Figure 4 shows a cross-sectional view of the liquid crystal support of Figure 3 combined with the lens support.

In FIG. 3, reference numeral 12 denotes a liquid crystal panel, 13 denotes a first bracket, 14 denotes a second bracket, 15 denotes a spring, and 16 denotes a bolt.

The liquid crystal display panel 12 is attached and fixed to the mounting groove 13s formed on the first bracket 13. Such a method of attaching the liquid crystal panel 12 may use an adhesive or a separate hook (not shown) formed on the first bracket 13.

Three holes 131, 13h2 and 13h3 formed on the first bracket 13 on which the liquid crystal display panel 12 is fixed are matched with three holes 14h1, 14h2 and 14h3 formed on the second bracket 14. Two brackets are coupled to the hole by bolts 16. At this time, the first bracket 13 and the second bracket 14 must be coupled in a predetermined spaced apart state. The separation method may be implemented in various ways. In this embodiment, the spring 15 is inserted between the first bracket 13 and the second bracket 14 to fasten the bolt 16. The spacing between the two brackets is determined by the height of the spring 15 itself, which is adjusted according to the insertion depth of the bolt 16.

As described above, the liquid crystal supporter configured as described above can adjust the inclination of the surfaces facing each other by adjusting the bolt 16, which is a coupling means of the first bracket 13 and the second bracket 14. As a result, the inclined slope of the liquid crystal panel 12 with respect to the second bracket 14 is adjusted by adjusting the bolt 16.

The optical arrangement of the liquid crystal panel and the lens in the state in which the liquid crystal support of FIG. 3 is combined with the lens support will be described with reference to FIG. 4.

The two lens supports 17 and 18 are fixedly provided with the liquid crystal panel 12 and the lenses 23c and 23d related to the optical arrangement, respectively, and the lens supports 17 and 18 and the liquid crystal support are joined by bolts. The distance between the lenses 23c and 23d and the liquid crystal display panel 12 and the opposite slope are determined by the shape in which the respective supports are coupled. However, as described above, the tightening degree of the bolt, which is a fastening means, or the respective supports are in contact with each other. It will be affected by the degree of surface treatment of the support. However, as shown in FIG. 4, the lenses 23c and 23d and the liquid crystal display panel are deflected by biasing the first bracket 13 on which the liquid crystal display panel 12 is fixed by the adjustment of the bolt 16 with respect to the second bracket 14. It is possible to adjust the opposite slope of (12).

The lens supports 17 and 18 are primarily directly coupled to the liquid crystal support for simplicity of description, and two lenses positioned before and after the liquid crystal panel 12 and fixed to each of the lenses 23c and 23d. Although the example of the support, the effect of applying the liquid crystal support of the present invention can be seen that the point that can adjust the slope of the liquid crystal display panel in the optical arrangement initially determined by each support is the same regardless of the structure and number of the lens support. .

As described so far, by providing the liquid crystal support according to the present invention, it is possible to adjust the liquid crystal panel to fit the optical arrangement for the components having an optical arrangement relationship with the liquid crystal panel, thereby reducing the manufacturing defect of the liquid crystal project In addition, the manufacturing error of the related parts can be corrected by the fine adjustment of the liquid crystal project.

Claims (5)

A liquid crystal support on which a liquid crystal display panel is installed, a lens support unit on which lenses disposed before and / or behind the liquid crystal display panel are installed, and the liquid crystal support and the lens support unit are fixed to fix an optical arrangement of the lens and the liquid crystal display panel. In the liquid crystal project coupled by means, the liquid crystal support is a first bracket to which the liquid crystal display panel is attached, a second bracket fastened to the lens support portion and the first bracket and the second bracket to be spaced apart by a predetermined distance Liquid crystal project comprising a fastening means. The liquid crystal project of claim 1, wherein the fastening means is a bolt, and a hole into which the bolt is inserted is formed in the first bracket and the second bracket. The method of claim 2, wherein the fastening means includes a bolt for fastening the first bracket and the second bracket and a spring fitted to the bolt to provide a mutual repulsive force to the first bracket and the second bracket. Characterized in the liquid crystal project. 4. The liquid crystal project according to claim 2 or 3, wherein at least two holes are formed to adjust the horizontality of the first bracket and the second bracket by adjusting the bolts. The liquid crystal project according to claim 1, wherein the coupling means is a bolt for coupling the second bracket and the long-term lens support part.