KR20010018048A - Tension structure and mathode of mask for tube - Google Patents

Abstract

PURPOSE: A supporting structure of a tension mask for a cathode-ray tube and a tensing method thereof are provided to prevent the distortion of a design dimension in a coupling process of the tension mask by using a structure that a main frame is tensed by a sub frame having a predetermined curvature. CONSTITUTION: A sub frame(101) has a rectangular shaped frame with two short sides and two long sides. A tension mask(110) is attached to a main frame(102) by welding. The main frame(102) has a predetermined curvature at the upper end surface of the frame(102). One end portion of a supporting frame(103) is slidingly coupled to the center(S) in any one short side of the sub frame(101). The other end portion of the supporting frame(103) is coupled to the edge of the main frame(102). By these structures, the supporting frame(103) firmly holds the main frame(102). At this time, the long side of the sub frame(101) has a predetermined curvature.

Description

Tension structure and mathode of mask for tube

The present invention relates to a support structure and a tensioning method of an image display device, in particular, a tension mask for a flat CRT tube, and more particularly, in accordance with the support structure in which the tensile force applied according to the characteristics of each part of the aperture grill mask is always constant. It relates to a mask support structure that can be retained.

In general, a flat CRT eliminates image distortion caused by a general CRT by forming a front panel, which is an image display surface, and has an advantage of maximizing an effective viewing angle with a 180 degree viewing angle. In addition, the screen reflection caused by the external light is minimized so that the external light is not reflected to the viewer's eyes, thereby reducing eye fatigue even when viewing for a long time.

In particular, a thin film tension-type aperture grill mask (hereinafter referred to as a tension mask), which serves as the screening of the electron beam, is supported by a separate support structure inside the front panel of the flat CRT.

The tension mask is always supported by the support structure at a constant tension (tension), at this time, by appropriately adjusting the tension applied to the mask it is possible to prevent the mask shake due to external impact or sound waves.

In addition, the tension mask is supported by the support structure to maintain a predetermined distance from the fluorescent film, which is the image display surface, so that a dot or stripe formed on the mask so that each emitted electron beam can strike the corresponding pixel of the fluorescent film accurately ( The position between the stripe) electron beam passing hole and the fluorescent film pixel is specified.

The apparatus shown in FIGS. 1 to 4 is described as an example of a tension mask structure and a planar CRT mounted with the structure according to the prior art.

The flat CRT has a panel 2 having a fluorescent surface 1 formed on its inner side, a funnel 3 fused using frit glass to the rear of the panel 2, and a neck portion 4 of the funnel 3. ), A deflecting yoke (7) for irradiating the entire screen of the electron gun (5) encapsulated in R, G, and B electron beams (6), the electron beam (6) emitted from the electron guns (5), and a panel (2) a tension mask (8) having a slit-shaped aperture grill (11) formed to be coupled to the inside of the electron beam to select a color of the electron beam, and a tension force applied to the tension mask (8), It consists of a support structure (9) for supporting a constant interval and a support spring (11) for fixing the support structure (9) to the stud pin (10) formed on the inner surface of the panel (2).

As shown in FIG. 2, the tension mask 8 is formed of a metal plate of a thin film (about 0.1 to 0.2 mm) and has a structure in which a plurality of aperture grills 11, which are slot-shaped electron beam transmission holes, are formed extending in a vertical direction. Both edges of the vertical direction (long side) are welded and fixed while being stretched under tension by the support structure 9.

As shown in FIG. 3, the support structure 9 has two long sides in a substantially vertical direction and is welded and fixed at both ends of the tension mask 8, and two main sides 9a in a horizontal direction. It is composed of a subframe (9b) is welded to both ends of the support) to support the main frame (9a).

The subframe 9b serves to support the mainframe 9a and to apply an inflation force for expanding the mainframe 9a outward in the vertical direction, and thus the mainframe 9a having a predetermined curvature. When the) expands to the outside, the tension mask 8, which is welded at both ends, is stretched to serve to receive the tensile force.

That is, as the tension mask 8 obtains the tensile force, as shown in Fig. 4, when the outer wall of the main frame 9a having a long side is compressed with a plurality of compression pins and a certain amount of displacement is compressed, the tension is reduced. The mask 8 is attached to the upper surface of the curvature of the main frame 9a by welding. Then, when the compression force applied to the main frame 9a is gradually released, the tension force is applied to the welded tension mask 8, and the force that the support structure 9 tries to return to the original position and the force that the tension mask 8 pulls are balanced. At this point, the positional displacement of the support structure 9 stops and ultimately the tension is applied to the tension mask 8 to complete the mask structure.

According to the above-described conventional technique, the support structure 9 for applying tension to the tension mask 8 is supported by the main frame 9a and the subframe 9b attached to each other by welding to form a structure. It can be seen that.

However, the supporting structure according to the prior art is a structure that can be twisted with each other at the welding portion of the main frame and the subframe when the compression force for welding the tension mask is applied and ultimately an error in the main frame dimensions when the tension mask is welded, In order to overcome the dimensional error, a lot of investment and precision process is required, which increases the manufacturing cost of the product.

In addition, since the tension mask is less stretched and sensitive than the amount of the support structure being compressed, the compression method uniformly compresses the mainframe by a certain amount of displacement from the outside. There was a problem in that the tensile force corresponding to each part of the mask was different depending on the product because the mask tensile force could not be obtained.

The present invention has been invented to solve the problems of the prior art as described above, and an object thereof is to prevent deformation of a design dimension of a structure due to an external force applied to the mask support structure during the coupling process of the tension mask.

In addition, another object of the present invention is to improve the reliability of the product so that it can be consistently appeared in the product produced a predetermined tensile force for each portion of the tension mask.

1 is an internal cutaway view of a typical flat brown tube.

2 is a cross-sectional view of a panel coupling of a mask support structure according to the prior art.

3 is a perspective view of a conventional mask support structure.

Figure 4 is a state diagram when compressing the frame of the conventional support structure.

5 is a perspective view of a subframe according to an embodiment of the present invention.

Figure 6 is a perspective view of the frame assembly of the support structure according to an embodiment of the present invention.

7 is a frame operation diagram for mask tensioning of the embodiment.

8 is a side view of the support structure of the embodiment;

9 is a perspective view showing a combined state of each of the frames.

10 is a perspective view of a support structure to which a mask is welded.

*** Explanation of symbols for the main parts of the drawing ***

100: support structure, 101: subframe, 101a: short side, 101b: cross section

102: main frame, 103: support frame, 110: tension mask

The mask support structure of the present invention for realizing the above object comprises: (1) a subframe forming a long side and a short side in a rectangular frame shape;

(2) a main frame coupled to both long sides or short sides of the subframe;

(3) a tension mask coupled to the mainframe to exert a tensile force in at least one direction;

(4) It characterized in that it comprises a support frame for supporting the main frame on the subframe.

On the other hand, the support frame is fixed at one end with the main frame; The other end is preferably rotatably fixed to the subframe.

The subframe may have a predetermined curvature at both sides of the mainframe to contact / couple the mainframe; Preferably, the main frame corresponds to the edge portion.

In addition, the present invention according to another aspect for realizing the above object, a rectangular frame in the horizontal frame and the vertical side of the sub-frame, the main frame corresponding to at least one side of the horizontal or vertical side of the sub-frame, one end of the main frame In the process of installing a thin film tension mask on the CRT mask support structure comprising a support frame coupled and rotatably fixed at the other end to the subframe:

Welding a tension mask to the mainframe;

Rotating the support frame is characterized in that the step of supporting and coupling the main frame to the subframe.

In this way, the degree of dimensional error required for the fabrication of the frame is roughly required, and the final tension mask is welded so that the amount of tension required for the mask is always constant after the main frame and subframe are combined. have.

As a result, there is an advantage that the tension required for each part of the tension mask can be kept constant every time the frame is manufactured, so that the quality can be stable.

And, there may be a plurality of embodiments of the present invention, hereinafter will be described in detail with respect to the most preferred embodiment.

Hereinafter, exemplary embodiments of the mask support structure according to the present invention will be described in detail with reference to the accompanying drawings.

In addition, in drawing used for description, about the component similar to the prior art, the same code | symbol is attached | subjected, and the overlapping description may be abbreviate | omitted.

5 is a perspective view of a subframe according to an embodiment of the present invention, FIG. 6 is a perspective view of a support structure by assembling each frame, FIG. 7 is a view illustrating a frame operation for tensioning a mask, and FIG. 9 is a perspective view showing a coupled state of each frame. 10 is a perspective view of a support structure to which a mask is welded.

Referring to the structure of the support structure 100 of the tension mask according to the present embodiment, the rectangular frame-shaped subframe 101 having two short sides 101a and the long sides 101b and the tension mask 110 are welded, respectively. The top surface has a predetermined curvature, and the end of one end is rotatably coupled to the central side (S) of the short side portion (101a) of the subframe (101) and the other end of the main frame (102) It is coupled to the edge of the support frame 103 for supporting the main frame 102. At this time, the outer side of the long side portion 101b of the subframe 101 has a predetermined curvature in a convex shape.

In order to manufacture the support structure 100 formed in this way, first, the long / short sides 101a and b are formed of four frames forming the subframe 101. When the main frame 102 having the curvature of the portion to which the tension mask 110 is to be welded and the support frame 103 for supporting the tension mask 110 are prepared, one end surface of the support frame 103 is the short side center side of the subframe 101. (S), the other end proceeds in the order of coupling to the main frame 102 to complete the support structure 100.

Subsequently, after the tension mask 110 is welded to the upper end of the main frame 102, the main frame 102 is tensioned toward the subframe 101 to be fixed to the long side portion 101b of the subframe 101. The spring 11 is attached in order to mechanically couple the completed supporting structure 100 to the panel 2.

Meanwhile, a process of tensioning the tension mask 110 according to the operation of each frame constituting the support structure 100 will be described below with reference to the accompanying drawings.

First, as indicated by a dotted line in FIG. 7, the main frame 102 is positioned and held by the support frame 103 at a position where the tension mask 110 that is not tensioned is to be welded and attached.

In this state, when the tension mask 110 is attached by seam resistance welding along the curved portion of the main frame 102, the main frame 102 is lowered toward the long side portion 101b of the subframe 101. In this process, the mask attached to the main frame 102 is tensioned to have a one-step tension, and the amount of tension corresponding to the center and the periphery (the center is small and the periphery), that is, the amount of tension that the mask must have for each part As the main frame 102 is coupled to the long side portion 101b of the subframe 101 having a curved shape to ultimately determine the amount, the amount of tension in the mask may be determined.

Subsequently, after the coupling is completed, the entire displacement of the support structure 100 occurs in order to support the tension applied to the tension mask. At this time, the tension pulled by the mask coincides with the repulsive force of the support structure 100, that is, 2 The short side portion 101a of the subframe 101 is responsible for most of the role up to the step mask tension.

In this process, as shown in FIG. 8, in order to maintain the balance of tension, the short side portion 101a has vertical, left, and right position movements and serves as an elastic body, and the main frame 102 is coupled with the subframe 101. With the support frame 103, which serves as a support for preventing the warping phenomenon, and at the same time as a guide for easy coupling, the elastic body serves to maintain a constant mask tension even after all the coupling operations are completed. do.

Looking at the tension amount applied to the tension mask 110 in more detail, as shown in Figure 7, the position displacement of the main frame 102 after welding the tension mask 110 is the welding position (c / d) of the tension mask Is moved to the fixed position d 'with the subframe 101 at this time, and the mask position is increased from the initial welding point c / d due to the mask displacement δ0 applied to the tension mask 110. It becomes the point c '.

The amount of stretching applied to the tension mask 110 is increased to be below the yield point of the mask material, so that if the tension applied to the support structure 100 is released at all times, the amount can be returned to the welding point position of the initial tension mask. Therefore, as shown in FIG. 8, when the main frame 102 to which the tension mask is welded is combined with the subframe 101, the subframe 101 acts as an elastic body to cope with the tension mask tension force. It has a mask displacement of δ2, and stops with the deformation of δ1 at a point where the tension mask 110 tension force and the subframe 101 elastic force are balanced to obtain a required level of mask tension force. .

As a result, as shown in FIGS. 9 and 10, the tensile force of the tension mask 110 welded and fixed to the main frame 102 of the present invention can be kept constant, thereby achieving stable operation.

As a comparative example, that is, in the mask support structure according to the related art, the main frame and the subframe are attached and joined to each other by welding, so that an error in the dimension due to the mutual twisting phenomenon occurs when the frame is compressed. Unlike the fact that the process required a bad effect on the quality, and the tensile force obtained for each part of the tension mask appeared differently depending on the structure produced differently, the mask support structure according to the present invention described above is a method of conventional frame compression. It can be seen that the conventional problem is solved by allowing the mainframe to be tensioned by a subframe having an arbitrary curvature.

As a result, according to the present invention, the degree of dimensional error required for fabrication of the structure is roughly required and the quality can be stabilized by always maintaining a constant tensile force required for each part of the welded tension mask. .

In addition, while specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

As described above, according to the present invention, in applying a tensile force to the tension mask, a predetermined tensile force can be always maintained in a product in which a predetermined tensile force is produced according to a central portion and a peripheral portion, and the design dimension of the support structure can be stably maintained. The quality of the CRT can be improved.

Claims (4)

(1) a subframe forming a long side and a short side in a rectangular frame shape; (2) a main frame coupled to both long sides or short sides of the subframe; (3) a tension mask coupled to the mainframe to exert a tensile force in at least one direction; (4) a tension mask structure for a CRT comprising a support frame for supporting the main frame on the subframe. The method of claim 1, The support frame, (1) one end is coupled to the mainframe; (2) The other end of the CRT tension mask structure, characterized in that the rotatable fixed to the subframe. The method of claim 1, The subframe may have a predetermined curvature at both sides of the mainframe to contact / couple the mainframe; Tension mask structure for a CRT tube, characterized in that the main frame corresponds to the edge portion. A subframe constituting a horizontal side and a vertical side in a rectangular frame shape, a main frame corresponding to at least one side of the horizontal side or the vertical side of the subframe, a support frame having one end coupled to the main frame and the other end rotatably fixed to the subframe In the step of installing a thin-film tension mask on the mask support structure for a CRT comprising: Welding a tension mask to the mainframe; And rotating the support frame to support and couple the main frame to the subframe.