KR20040108117A - Projection television - Google Patents

Abstract

PURPOSE: A projection television is provided to prevent vibration of a screen due to percussion occurring in moving or positioning the projection television, thereby preventing damage of the screen. CONSTITUTION: A screen(5) has a plurality of sheets for forming an image. A covering element(10) is installed at the front of the screen. A support bracket(20) for supporting the screen is coupled to the covering element, wherein the support bracket is installed at the back of the edge of the screen. An elastic element(50) is installed in at least one of spaces between the screen and the covering element and between the screen and the support bracket.

Description

Projection television {PROJECTION TELEVISION}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection television, and more particularly, to a projection television with improved support structure of a screen for forming an image.

In general, a projection television includes a CHO (CATHODE-RAY TUBE) assembly that projects an image beam, a reflector that reflects the projected beam, and a screen that forms an image from the reflected beam. The projection television is provided at the front of the screen to form a front exterior, and a cover member having an opening formed to expose an image of the screen, and a rear casing provided at the rear of the screen to form a rear exterior and support a reflector and a CRT assembly. Include.

Such a projection television further includes a bracket provided at the rear edge of the screen and fastened by a cover member and a screw to support the screen forming the image. The cover member and the bracket are made of plastic or steel.

The screen is mainly composed of Lenticular and Fresnel, and the beam reflected from the reflector by the pair of image forming sheets forms an image. The screen may further include a protective sheet such as a sun screen to prevent light from being reflected on the surface.

In order to fasten the screen, first, the front edge of the screen is placed on the rear surface of the cover member in which the opening is formed. Then, the bracket is positioned in the rear magnetic field of the screen, and then the bracket and the cover member may be fastened by using a screw.

However, such a conventional projection television is supported by a cover member and a bracket provided with a screen of several layers, so that the impact generated when the projection television is moved or adjusted is transmitted to the screen to vibrate the screen to form various screens. There is a problem that the sheets of the layers rub against each other and damage the sheets.

It is therefore an object of the present invention to provide a projection television capable of preventing damage to the screen.

1 is a perspective view of a projection television according to a first embodiment of the present invention;

2 is an exploded perspective view of the projection television of FIG. 1;

3 is a partial cross-sectional view of the screen of the projection television of FIG. 1;

4 is an exploded perspective view of a projection television according to a second embodiment of the present invention;

5 is a partial cross-sectional view of the screen of the projection television of FIG.

* Explanation of symbols for the main parts of the drawings

1: projection television 5: screen

6: image forming sheet 7: protective sheet

10 cover member 13 opening

15: Boss 17: Screw

20: support bracket 21: support

23: fastening portion 25: fastening hole

30: rear casing 31: reflector

40: CRT assembly 41: CRT

43: CRT frame 45: circuit board

50: elastic member 51: pressing projection

According to the present invention, there is provided a projection television, comprising: a screen provided with a plurality of sheets to form an image; A cover member provided in front of the screen; A support bracket provided behind the edge of the screen and engaged with the cover member to support the screen; And an elastic member provided between at least one of the screen and the cover member and between the screen and the support bracket.

Here, at least one of the cover member and the support bracket in contact with the elastic member is preferably provided with a pressing projection formed to press the elastic member.

The elastic member preferably surrounds the entire edge of the screen.

One of the cover member and the support bracket is provided with a boss having a female threaded portion, and the other is preferably provided with a fastening hole to be fastened by the female threaded portion and the screw of the boss.

The elastic member is preferably a sponge.

Prior to the description, in the various embodiments, components having the same configuration will be representatively described in the first embodiment using the same reference numerals, and in other embodiments, different configurations from the first embodiment will be described. Do.

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

First embodiment,

As shown in FIGS. 1 to 3, the projection television 1 according to the first embodiment of the present invention includes a screen 5 for forming an image and a cover member 10 provided in front of the edge of the screen 5. And a support bracket 20 which is provided at the rear of the edge of the screen 5 and is fastened to the cover member 10 to support the screen 5, and a CRT (CATHODE-RAY TUBE) assembly 40 for projecting an image beam. And a reflector 31 reflecting the projected beam to the rear surface of the screen 5, and a rear casing provided at the rear of the screen 5 and the support bracket 20 to support the CRT assembly 40 and the reflector 31. 30 and an elastic member 50 provided between the screen 5 and the cover member 10 and between the screen 5 and the support bracket 20.

The screen 5 is formed in a rectangular flat plate shape to form an image by the image beam reflected from the reflecting mirror 31 located behind. The screen 5 has a pair of image forming sheets 6 such as Lenticular and Fresnel, in which an image is formed by the beam reflected from the reflector 31. The screen 5 is further provided with a protective sheet 7 such as a sun screen to prevent light from being reflected on the surface of the image forming sheet 6 in front of the image forming sheet 6. It is desirable to have.

The cover member 10 is provided to form the front appearance of the projection television 1 and has an opening 13 opened to expose the image surface of the screen 5. And, the cover member 10 is preferably formed with a plurality of bosses 15 to be fastened by the support bracket 20 and the screw 17 on the rear surface. In addition, the cover member 10 is preferably manufactured by plastic injection, it may be provided with a press-treated steel material, it may be made of wood material, of course.

The rear casing 30 is provided to form the rear and side surfaces of the projection television 1, the front surface of which is coupled to the cover member 10 by fastening means such as a screw, not shown. In addition, a CRT assembly 40 for projecting an image beam for forming an image is installed at an inner lower portion of the rear casing 30, and an image beam projected from the CRT assembly 40 is disposed at the upper portion of the rear casing 30 to the screen 5. The reflecting mirror 31 for reflecting is installed inclinedly. The bottom portion of the rear casing 20 is provided with a circuit board 45 for controlling the CRT assembly 40 and the like.

The CRT assembly 40 includes a plurality of CRTs 41 for projecting an image beam and a CRT frame 43 for supporting the plurality of CRTs 41. In addition, the CRT assembly 40 is preferably fastened at an angle capable of projecting an image beam to the lower region of the rear casing 30 with the reflector 31.

The support bracket 20 has a support 21 supporting the rear edge of the screen 5 and a fastening portion 23 extending from the support 21 to be engaged with the cover member 10. And, it is preferable that the support bracket 20 is provided with a plurality of rear edges of the screen 5, but one is provided in the shape of a "wh" to support the rear edge of the screen 5, of course. In addition, the support bracket 20 is preferably manufactured by plastic injection, but may be provided by press-processed steel material, or may be made of wood.

The support 21 is provided to support the rear edge of the screen 5 with the elastic member 50 interposed therebetween. In addition, the support 21 is preferably provided in parallel with the screen 5 and has a width such that it does not interfere with the beam reflected by the reflector 31.

The fastening part 23 is preferably provided with a plurality of fastening holes 25 to be coupled by a plurality of bosses 15 and screws 17 provided in the cover member 10.

The elastic member 50 is provided between the screen 5 and the cover member 10 and between the screen 5 and the support bracket 20, and is pressed by the fastening force of the cover member 10 and the support bracket 20. Support the screen (5). In addition, the elastic member 50 preferably surrounds the entire front and rear edges of the screen 5, but may be provided to contact a region of the front and rear edges of the screen 5. In addition, the elastic member 50 is preferably a sponge having a rectangular cross section, but is made of a material having an elastic force so as not to damage the surface of the screen 5 upon contact, such as a rubber material or a material material, and to absorb the shock generated during movement. It is preferable to provide. In addition, the elastic members 50 may be provided in plural in front and rear of the screen 5, respectively, and may be provided in pairs in front and rear of the screen 5, respectively.

With this configuration, a process of assembling the screen 5 of the projection television 1 according to the first embodiment of the present invention will be described.

First, the elastic member 50 is positioned on the rear surface of the opening 13 of the cover member 10. After positioning the screen 5, the elastic member 50 is positioned at the rear edge of the screen 5. Then, the support 21 of the support bracket 20 is in contact with the elastic member 50, the fastening hole 25 of the fastening portion 23 is positioned so as to communicate with the boss 15 of the cover member 10 After fastening using a screw (17). Then, the support part 21 presses the elastic member 50 by the fastening force of the screw 17 to support the screen 5.

Thus, in the projection television 1 according to the first embodiment of the present invention, by providing the elastic member 50 between the screen 5 and the cover member 10 and between the screen 5 and the support bracket 20, Dust generated by mutual friction and friction of a plurality of sheets such as the image forming sheet 6 and the auxiliary sheet 7 provided on the screen 5 by absorbing the shock generated when the projection television 1 is moved or positioned. The surface of each sheet can be prevented from being damaged, and the surface of the screen 5 can be protected by allowing the screen 5 to be supported without being in direct contact with the cover member 10 and the support bracket 20. .

In the above-described embodiment, the elastic member 50 is provided between the screen 5 and the cover member 10 and between the screen 5 and the support bracket 20, but the cover member 10 and the support bracket 20 In consideration of the material, etc. may be provided between one of the screen 5 and the cover member 10 and between the screen 5 and the support bracket 20 as necessary.

In the above-described embodiment, the boss 15 is provided on the cover member 10, and the fastening hole 25 is formed in the fastening portion 23 of the support bracket 20, but the fastening hole is formed in the cover member 10. The boss may be provided in the fastening portion 23 of the support bracket 20.

In addition, in the above-described embodiment, the cover member 10 and the support bracket 20 are fastened by the screws 17, but protrusions are provided on any one of the cover member 10 and the support bracket 20, and the other. Protrusion receiving portion to receive and combine the projections may be provided to be fastened, may also be fastened by an adhesive or the like, of course.

Second embodiment,

4 and 5 are exploded perspective and sectional views of the projection television 1 according to the second embodiment of the present invention.

As shown in these drawings, the second embodiment is provided with a pressing member 51 formed to press the elastic member 50 to the cover member 10a and the support bracket 20a in contact with the elastic member 10. This is different from the first embodiment.

The pressing protrusion 51 is formed to protrude in the direction of the elastic member 50 on the rear surface of the cover member 10a, and preferably protrudes in the direction of the elastic member 50 from the support portion 21a of the support bracket 20a.

The pressing protrusion 51 provided on the rear surface of the cover member 10a is preferably formed along the edge of the opening in the shape of a rib.

The pressing protrusions 51 provided on the supporting portion 21a of the support bracket 20a may be provided in a conical shape. However, the pressing protrusions 51 may have a rib shape like the pressing protrusions 51 provided on the rear surface of the cover member 10a. Of course, it may be provided.

As a result, the elastic member 50 may be prevented from being separated from the screen 5 and the cover member 10a by the pressing protrusion 51 and between the screen 5 and the support bracket 20a.

In the above embodiment, the pressing protrusion 51 is provided in both the cover member 10a and the support bracket 20a in contact with the elastic member 50, but the material or elasticity of the cover member 10a and the support bracket 20a. Depending on the presence or absence of the member 50 may be provided only in any one of the cover member (10a) and the support bracket (20a).

As described above, the projection television according to the present invention includes a cover member provided in front of the edge of the screen, a support bracket provided behind the edge of the screen and fastened to the cover member to support the screen, between the screen and the cover member, and between the screen and the support bracket. Including an elastic member provided in at least one of the, it is possible to absorb the shock generated during the movement to prevent damage to the screen.

As described above, according to the present invention, it is possible to absorb the shock generated during the movement to prevent damage to the screen.

Claims (5)

In projection television, A screen provided with a plurality of sheets to form an image; A cover member provided in front of the screen; A support bracket provided behind the edge of the screen and engaged with the cover member to support the screen; And an elastic member provided between at least one of the screen and the cover member and between the screen and the support bracket. The method of claim 1, And at least one of the cover member and the support bracket in contact with the elastic member is provided with a pressing protrusion formed to press the elastic member. The method of claim 2, And the elastic member surrounds the entire edge of the screen. The method of claim 3, Projection television, characterized in that any one of the cover member and the support bracket is provided with a boss having a female threaded portion, the other is provided with a fastening hole to be fastened by the female threaded portion and the screw of the boss. The method according to any one of claims 1 to 4, And the elastic member is a sponge.