JPH02501687A - Color cathode ray tube faceplate assembly and method for securing a shadow mask support structure to the tube faceplate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The faceplate assembly of a color cathode ray tube and the faceplate of that tube. How to fix the shadow mask support structure TECHNICAL FIELD This invention relates generally to color cathode ray tubes, and more particularly to tension foil shadow tubes. The present invention relates to a new front assembly for a collar tube having a disc. The present invention also The present invention relates to a method used for manufacturing eel tubes. The present invention is applicable to home television receivers. including those used in medium and high resolution tubes for color monitors. Effective for various shapes of collar tubes.

The use of tension foil masks and flat face plates replaces traditional curved surfaces Alternatively, it has many advantages when compared to a dome-shaped Jadoma mask. Especially the brightness greater output throughput, allowing for a 3x increase in output power. tension Conventional curved shadow masks that do not apply shadow masks are designed to cover high-brightness image areas where electron impact is greatest. It tends to form a dome.゛The color changes as the mask approaches the faceplate. Impurity occurs. When the tension is high, the tension foil mask becomes dome-shaped. It does not bend or move relative to the faceplate. The purity of freedom It has a larger brightness potential while maintaining the brightness.

The tension foil shadow mask is part of the front assembly of the cathode ray tube. Located adjacent to the faceplate. This front assembly has fluorescent tubes It consists of a face plate, a shadow mask, and means for supporting this mask. . The "shadow mask" used here is, for example, a perforated metal mask with a thickness of approximately 1 mil or less. means foil. This mask is installed from the inside of the faceplate Must be supported in a high tension state. This distance is called "Q-distance" being called. High tension is in the range of 20-40 kpsi. As is well known The shadow mask acts as a color selective electrode or parallax barrier. , ensuring that each of the three color beams enters its assigned phosphor. .

The requirements for a shadow mask as a support means are strict.

As is self-evident, the shadow mask must be worn under high tension. Ma The mask support means must have high strength to hold the mask immovable. 10 Inward movement of the mask on the order of a fraction of a mil can cause wear and tear on the guard band. is important. Also, the means for supporting the shadow mask is compatible with the means for attaching it. It must be of a certain shape and material composition. - For example, this supporting hand If the step is to be attached to the glass, such as the inner surface of a faceplate, the support means will be It must have approximately the same coefficient of thermal expansion as glass. The means of support is to wear a mask. A suitable surface must be provided. This support means also allows the mask to resist electrical resistance. The composition must be such that it can be welded there by anti-welding or laser welding. No. The support surface is preferably such that it prevents the intimate metal-to-metal contact necessary for proper welding. The flatness should be such that no air bubbles exist between the mask metal and the support structure. .

The means for securing the shadow mask support to the inner surface of the faceplate is non-vitrified glass. Consists of cement in the form of lath frit. This form of cement is not satisfactory. However, it is difficult to handle and apply to manufacturing, and after the screening fluid accumulates, Extremely disadvantageous in that it tends to create "pockets" that can be released as contaminants. This is the case.

Additionally, the composition of the frit itself is typically used in photoscreening processes. If it comes into contact with strong chemicals, it will chemically break down and the by-products of that destruction will damage the inside of the pipe. To contaminate.

The tension mask alignment and support system is described in U.S. Pat. , 547,696. A frame with dimensions that surrounds the screen is It comprises first and second spaced surfaces. Foil seat under tension The periphery of the shadow mask is glued to the second side of the frame. This frame is is aligned with the faceplate by groove-shaped indexing means.

The shadow mask is sandwiched between the frame and the stabilizing or stiffening member. It is said that When this system is assembled, the frame is attached to the faceplate seam. between the funnel protrusion and the funnel, and the stabilizing member projects from the frame to the funnel. put out This method is reliable and allows the mask to be exposed under high tension and flash. provides an effective means of holding the cathode firmly parallel to the It increases the weight of the tube and requires extra process steps in its manufacture.

Currently, there are color tubes on the market that utilize a tensioned shadow mask. . This mask is placed under high tension by purely mechanical means. Especially the mask If a very heavy mask support frame is attached to the support frame before or during Compressed. When you release this frame, the mask will be higher due to the recovery power within the frame. placed under residual tension. Masked by electron beam impact during normal tube operation is heated and the tension of the mask decreases.

The upper limit is that the mask can be safely relaxed and scanned without losing its color selection ability. It is exposed to the intensity of the electron beam used for clean bombardment. This upper limit is color image with the same brightness as that produced in the tube with a shadow mask. This is known to be lower than what is required to occur. For an example of this shape of tube See US Pat. No. 3,683,063.

Other prior art is U.S. Pat. No. 4,087,717, U.S. Pat. No. 4,045,701, Same No. 4,100,451, Same No. 2,625,734, Same No. 3.727,08 No. 7, No. 4,069,567, No. 3,894,321, No. 3.284 , No. 655, No. 3,303,536, No. 2,905,845, and No. 2,905,845. 2.842.696. Mata, IREm journal, January and December 1954, Class R583,6 Filer Other rCBS Colortrons: Advanced Design Models Image Tube and Society for Information Display "High Brightness Shadows for Cockbit Displays" by Robinda et al., 1983. Please refer to Mask Color CRTJ.

In cathode ray tube manufacturing technology, metal pins are placed around the face plate of the tube. It is known to implant the implant by pressing it into softened glass. These pins The curved face plate is used in conjunction with the curved face plate of a conventional cathode ray tube. Serves as a suspension point for the usually three bimetallic springs that support the spray plate. It works.

U.S. Patent No. 3,695.860 describes an automated device for embedding metal bottles in glass panels. , which indicates that the pin should be aligned properly with the inside perimeter of the faceplace. The means for holding the pin and the embedded tip of the pin are heated with a flame, and the circumference of the pin to be embedded is heated. It consists of means for flame heating the side area.

The peripheral pin-embedded area is heated to approximately 1,150°C, and the pin is heated to approximately 1.050°C. Ru. Next, the pin held in the pinch lock is moved around the glass by a ring cam mechanism. pushed into.

U.S. Pat. No. 3,890,526 discloses a method for a cathode ray tube having a curved face plate. The faceplate attachment structure of the curved color selection electrode is shown. This mounting structure Contains four sheet metal studs that are part of the electrode support device. these studs are hot Embedded in the curved faceplate by sealing. This content is and the area of the faceplate that receives them. Contains a mechanical description for the stud device, after which the stud is automatically pressed into the glass. It's pushed into me.

Glass-to-metal ceramic seals or adhesives in Harrington, MA Daniel I. Pomerantz of the Mallory Institute of Physics.

A flat piece of glass is brought into contact with a flat piece of metal. These pieces are made of softened glass. It is heated to about 250°C below the point.

Direct current is applied between these two pieces to create a capacitor with the metal piece being positive. Do it like this. This results in adhesion of the two pieces. This process of manufacturing cathode ray tubes No commercial applications for construction are currently known. (Source: The Electronic Engine Near, September 1958, by David H. Sagan, 16-17 pages. "Sealing in kilovolts") Generally, the present invention provides an improved front assembly for a tension foil shadow mask tube. The purpose is to provide three-dimensionality.

Therefore, the present invention provides a face plate with a centrally located fluorescent screen on its inner surface. The present invention provides a front assembly for a color cathode ray tube having a The solid has a corrugated cross section to support the shadow mask in tension and A shadow mask support structure that substantially surrounds the fluorescent screen and this corrugated structure is and means for securing to the faceplate.

This improved shadow mask support structure of the present invention is characterized by low cost and light weight. Change Additionally, this support structure simplifies manufacturing and reduces manufacturing costs.

Another object of the invention is to create a tensioned foil shadow mask that is substantially flat. Improved faceplate for color cathode ray tubes with flat faceplates assembly, and the foil shadow mask support under tension To provide a simplified method of mounting on a flat faceplate.

Therefore, the present invention provides a glass fascia having a centrally located fluorescent screen on its inner surface. tension on the base plate and mask support structures located on either side of this screen. Foil for color cathode ray tubes with a foil shadow mask mounted in the closed state. This mask support structure provides a face plate assembly. Physically attach the faceplate for its permanent non-adhesive fixation to the embedment of this mask support structure means that this structure is The depth is such that it resists the strength of the force.

The present invention also provides a glass face with a centrally located fluorescent screen area on the inner surface. Stabilize the support structure for foil shadow masks under tension on the spray plate. This method involves holding the shadow mask in tension. A base part that passes through the mounting surface and face plate for mask fixation for support. providing a frame-like support structure having a frame-like support structure; providing a faceplate having at least a surface that is heated to a temperature at which it is intended to be heated; Step and pass this support structure through the inner surface above both sides of the screen to the faceplate. The base part pushes this structure against the mask's tensile force and forces it into the flap. At the same time as fixing to the face plate, the above mounting surface is planned from the inside of the face plate. the mounting surface to a depth effective for positioning at a distance of Place the foil shadow mask properly spaced against the inside surface of the face plate. The step of placing it in a tensioned position and applying a fluorescent screen to the inner surface. the step of attaching the foil mask to the attachment surface under tension after attaching the foil mask; Consists of.

One advantage of this improved faceplate assembly is that the tension foil This means that the mask is firmly and securely attached to the face plate. Ru.

Additionally, this assembly allows shadow masks to be attached to the faceplate without the use of special adhesives. provides a means of permanently attaching a support structure for

This improved method of the invention does not create pockets for contaminants during manufacturing. Fix the tension foil shadow mask support to the inner surface of the faceplate as do.

Other features and advantages of the invention will be apparent from the accompanying drawings: It will become clearer from the explanation.

FIG. 1 shows a cabinet containing a cathode ray tube having a front assembly according to the present invention. FIG. 3 is a partially cutaway perspective view.

FIG. 2 is a partially cutaway perspective side view of the color cathode ray tube of FIG. 1, and shows the concept of the present invention. FIG. 3 is a diagram showing the arrangement of a shadow mask support structure to which the method is applied.

Figure 3 shows the relationship between the shadow mask support structure and the inner surface of the face plate in Figure 2. FIG.

Figure 4 is an enlarged partial cross-sectional view taken through the front assembly at the axis of the cathode ray tube. It is.

FIG. 5 is a partial cross-sectional view through the front assembly of the shadow mask of the present invention. FIG. 3 is an enlarged view of one end of the support structure.

FIG. 6 is an exploded perspective view of the corrugated member and cap of the shadow mask support structure.

FIG. 7 is a top view of the opposing corners of the pair of support structures.

FIG. 8 is a cutaway sectional view of another embodiment of the invention similar to FIG.

FIG. 8a is a cutaway sectional view of another embodiment of the invention similar to FIG.

FIG. 9 shows a breakdown of another embodiment of the invention included in a color cathode ray tube as shown in FIG. FIG. 2 is a cross-sectional perspective view showing the arrangement of the shadow mask support structure of the present invention.

Figure 10 shows the shadow mask support for the inner surface of the cathode ray tube faceplate in Figure 9. FIG. 3 is a plan view showing the relationship between holding structures.

Figure 11 is an enlargement taken through the front assembly along the axis of the cathode ray tube of Figure 9. FIG.

FIG. 12 is a partial perspective view showing one form of the shadow mask support structure of FIG. 9. .

13 is a partial perspective view showing another form of the shadow mask support structure of FIG. 9. FIG.

FIG. 14 is a partial perspective view showing still another form of the shadow mask support structure of FIG. Ru.

FIG. 15 is an end view of the support structure of FIG. 14.

Figure 16 shows a blank formed by punching out the support structure of Figures 14 and 15. FIG.

FIG. 17 is an end view of the blank of FIG. 16.

18 is a partial perspective view showing another form of the shadow mask support structure of FIG. 9. FIG.

FIG. 19 is an end view of the support structure of FIG. 17.

FIG. 20 is a perspective view of a broken side view of another embodiment of the present invention included in the color cathode ray tube of FIG. 1. FIG. 7 is a perspective view showing the arrangement of another shadow mask support structure of the present invention.

Figure 21 shows the shadow mask support structure for the inner surface of the face plate in Figure 20. FIG.

Figure 22 shows the part of the tension mask that is attached to the welded face plate. 21 is a partial cross-sectional view of one version of the support structure of FIG. 20; FIG.

Figure 23 is a partial plan view of the support structure in Figure 22 with the tension mask removed. It is.

FIG. 24 is a cross-sectional view taken along line 24--24 of FIG. 22.

Figure 25 shows the portion of the support structure of Figure 22 secured to the faceplate in a different manner. FIG.

FIG. 26 is an axial cross-sectional view of the front assembly of the color cathode ray tube of FIG. 20.

Figure 27 shows the frame-shaped tension foil shadow mask support structure on the face. A flat or substantially flat face positioned to rest on the inner surface of the plate. FIG.

FIG. 28 shows the face plate fixed to the inner surface of the face plate by the method of the present invention, FIG. FIG. 3 is a perspective view showing an enlarged detail of the support structure of FIG.

FIG. 29 is a cross-sectional perspective view of a shadow mask support structure different from the face plate. FIG. 2 is a diagram illustrating fixing of a support structure to the inner surface of a face plate by the method of the present invention. 29A is an enlarged view of the circular portion of FIG. 29.

FIG. 30 is a perspective view of a corner part of another type of shadow mask support structure, which is the present invention. FIG. 3 is a diagram showing fixing of the support structure to the inner surface of the face plate by the method of FIG.

Figure 31 is a perspective view of a part of the face plate, showing a shadow mask similar to the figure. It is a figure which shows fixation of a support structure.

FIG. 32 shows the face plate shown in FIG. 22 fixed to the inner surface of the face plate by the method of the present invention. FIG. 3 is a perspective view of a face plate portion showing a shadow mask support structure.

FIG. 33 is a cross-section of the apparatus used in the method of the invention for installing a shadow mask support structure. and a front view.

FIG. 1 shows a video monitor 10, which has a novel front assembly according to the present invention. A color cathode ray tube 12 having a three-dimensional shape is built in. This tube can display images without distortion It is characterized by a flat image surface 14. The image plane 14 also has its corners shaped like a conventional cathode ray tube. Allows for more effective use of the screen surface compared to rounded corners.

Second. In Figure 3.4, the front assembly 15 for high resolution color cathode ray tube ( FIG. 4) is shown, the general scope of which is indicated by a bracket. centre The front assembly 15 may be flat or "actual" at a point with infinite horizontal and vertical radii. It includes a glass faceplate 16 that is qualitatively flat. In this example The flat, flangeless faceplate 16 has a fluorescent lamp centrally located on its inner surface. It has a target surface 18 on which a conductive film 19 is disposed. fluorescent targets The target surface 18 and the conductive film 19 constitute an electron beam target surface 20, which The beam target surface is called a screen and is coated with a uniform fluorescent slurry during manufacturing. It is now possible to receive a Conductive film placed on the phosphor layer in the final stage The film 19 consists of a very thin, light-reflective, electron-transparent film of aluminum. .

The screen 20 is surrounded by a peripheral sealing surface 21 adapted to fit into the funnel 22. Ru. The sealing surface 21 has three grooves, and FIG. 4 shows two grooves 26A. Only 26B is shown. These grooves are equiangular to the center of the face plate 16. They are circumferentially spaced at 120 degree intervals. Index groove 26 A and 26B are shown in FIG. Although the third index groove is not shown, groove 2 It is located on the peripheral sealing surface 21 equidistant from 6A and 26B. These V grooves are aligned provides indexing of the faceplate 16 in relation to the matching envelope member; It is something.

Funnel 22 has a funnel sealing surface 28, which faces a second, similarly oriented surface. index grooves 30A and 30B, which are adjacent to first grooves 26A and 26B; They are shown in FIG. 4 facing each other. give complementary round index means Spheres 32A and 32B are inserted to align faceplate 16 and funnel 22. It is joined to the index grooves 26A and 26B and 30A and 30B. The first index groove is Index hand during photoscreening of phosphor on faceplate along with spheres Used as a step.

The front assembly 15 of the present invention faces between the screen 20 and the peripheral sealing surface 21. A tension foil is fixed to the inner surface of the spray plate 16 and surrounds the fluorescent target 18. and a mask support structure 34. This support structure extends from the inner surface of the face plate 16. Support the tension foil shadow mask 35 at the planned "Q-distance". Ru. This planned distance may be the "Q-distance" 36 shown by the arrow in FIG.

The mask, which is flat, is shown stretched in all directions within its plane.

As shown in FIG. 2, a neck 37 extending from the funnel 22 is a conductive film 19. Three electron beams selectively activate the fluorescent target 18, which is the coloring phosphor on the top. An electron gun 38 that generates 40, 42, and 44 electron beams is built-in. Beam 40, 42.44 of the phosphor after passing through the varalax barrier formed by the shadow mask 35. It acts to selectively activate patterns.

Funnel 22 has an internal conductive funnel coating 45 that is at a high potential.

A potential is applied via an anode button 46 attached to a conductor 47, which conducts a high potential through the walls of funnel 22 to anode 46 .

The potential line is a high voltage power supply (not shown). This potential is 1g-26K in the example shown. A range of V is sufficient. Electrical connection between conductive support structure 34 and funnel coating 45 The means for providing the connection consist of spring means S (FIG. 4).

A magnetically permeable internal magnetic shield 48 is attached to support structure 34 . The shield 48 Provides a large shield but does not interfere with the deflection of the electron beam 40, 42.44 It extends to the funnel 22 by a scheduled distance 49 like this.

Yoke 50 surrounds tube 12 in the joint area between funnel 22 and neck 37. Yo The arc 50 is electromagnetically scanned across the screen 20 by the beams 40, 42, 44. It is something that The central axis 52 of tube 12 is shown in dashed line.

Referring to FIGS. 5 and 6 in conjunction with the previous drawings, the shadow mask support structure of the present invention is shown. The structure 34 includes a corrugated conductive metal strip 60 defining an upper corrugated edge 62 and a lower corrugated edge 64. formed from. The lower edge 64 provides a means for securing the support structure to the faceplate 16. give. Upper edge 62 provides a means of securing shadow mask 35 to a support structure. child The corrugated strips have a uniform width (i.e. between the faceplate and the shadow mask). The upper edge 62 is arranged in a plane parallel to the y direction with respect to the face plate. Ru. Both sides 66a and 66b of the corrugated strip are flattened, with side 66a being flat in a common plane. 66b are arranged in a common plane, and these two common planes are connected to the face plate. In the direction perpendicular to the shadow mask, it is parallel to so. However, this wave The plan view of the shaped strip is not the ``rectangular wave'' shown in Figure 6, but rather the ``sine wave'' or ``three wave'' shape. It may be serpentine to show a shape such as a square wave.

As mentioned above, the upper edge 62 provides a means for securing the shadow mask 35 to the support structure 34. I can do it. Therefore, in the basic implementation of the invention, the mask 35 is attached to the edge 62, e.g. Can be directly fixed by welding.

In the embodiment of FIG. The cap 68, as well as the corrugated strips 60 disposed thereon, may be elongated or have a fluorescent screen. 20 along the sides.

The cap 68 is generally U-shaped, with legs 70a and 70b extending from the sides 6 of the corrugated strip 60. 6a and 66b, respectively. The cap 68 is metal with corrugated strip sides 66a.

66b and the legs 70a, 70b of the cap are secured to the corrugated strip 60 by lava means. determined. Of course, in the case of the undulating shape as mentioned above, the legs of the cap are It is adapted to the curvature of the undulating strip.

The upper part of the cap 68 has a flat part 72 and a raised land part 74. There are several steps to help you make it. Flush as shown in Figure 4.5. The top portion 72 rests over the upper edge 62 of the corrugated strip 60. The land portion 74 is a shadow - Provides a beam flat ridge for fixing the mask thereto by means of welding.

The metal material of the corrugated strip 60 and the cap 68 is similar to the glass of the faceplate 16. It is preferable to use a chromium-iron alloy "Carpenter #27" having the same coefficient of expansion.

The tension foil shadow mask support structure 34 has two or more tension foil shadow mask support structures. The 4th fluorescent screen 20 is centrally located because it can be easily made with a single piece of metal material. arranged along two straight sides. On the other hand, this support structure has a centrally located fluorescent The beam can be applied continuously (without breaks) around the light screen. others 4-6, the land portion 74 runs along the inside of the cap 68, that is, along the middle. Offset and distributed along the inside of the top edge 62 closest to the centrally located fluorescent screen. be placed. The advantage of such an inward facing arrangement is shown in Figure 7, where the support structure In the alignment of the straight sections, i.e. in the corner areas of the fluorescent screen, the outside This means that the side corners 76 are rounded. adjacent cap and or The matching inner corners of adjacent edges of the corrugated strips are secured by welding at 78. I can do it. In this way, rounding the outer corners of the shadow mask support structure is It does not interfere with welding and fixing. Figure 2 shows a series of centrally located fluorescent screens 20. 3 shows a continuously surrounding shadow mask support structure.

FIG. 8 shows another form of the invention, in which the cap 68' is '1'' L-shaped. and includes a foot 80 which is secured to the upper edge 62 of the corrugated strip 60 by welding means. It is flat due to the The legs 82 of the cap 68' project from the corrugated strips. , and a land portion 8 for fixing the tension foil shadow mask there. Limit 4.

Again, the land portion 82 is formed by welding the support structure surrounding the screen at its inner corner. The center should be chamfered or rounded in the same way as in Figure 7 without disturbing the Offset or extending along the inside of the centrally located fluorescent screen closest to it. ing.

FIG. 8a shows another form of the invention, in which the cap 68' has an upper edge 62 of the corrugated strip 60. It has a V rectangular block shape (in cross section) with a lower flat surface 86 fixed to the ing. The cap 68' further includes a land portion 88 to which a tension mask is attached. The periphery of is fixed by, for example, welding. This land portion 88 of the cap 68' while allowing the lava means to easily access the parts of the mask adjacent to the tool. A spacer is provided to allow the tool to engage and hold the perimeter of the mask over the lands. space is secured.

Another embodiment of the invention is shown in Figure 11.12.13, in which the system of the invention The shadow mask support structure 134 is a flat surface for securing the shadow mask 35 thereto. A conductive metal strip is fabricated to create a top or ridge 160. multiple legs Sections 162a and 162b hang from this ridge and form the faceplate of the support structure. This makes it easy to fix to the bracket 16. The upper part of the ridge 160 is as shown in FIG. flat and legs 162a and 162b extend outward from either side of this ridge. Stabilize this support structure under the tension of the shadow mask by expanding. these The legs flare outwardly from the ridge alternately on each side, so that the legs 162a are attached to the tube. The legs 162b widen inward toward the central axis of the tube. Garu.

Two examples of support structures 134 are shown in FIG. The only difference is the method of fixing to the face plate 16. In detail, Figure 11.12 shows the legs A long metal strip 164 is shown secured to the distal ends of sections 152a and 162a. child The strips on one side are attached to the face plate by hardening cement 166 (Fig. 11). It is fixed at 16. This metal strip can be used, for example, in the well-known non-vitrified glass lift or The face plate 1 is made of cold cement such as Zarael crampon type cement. Can be fixed to the inner surface of 6.

Legs 162a and 162b of metal support structure 134 are secured to plate 164 by welding. It can be determined. On the other hand, the tensidine foil shadow mask 35 is attached to the ridge 1 of the structure 134. Welded to the flat top surface of 60.

The metal material of plate 164 and/or structure 134 is different from face plate 16. Carpentate of Reading, Pennsylvania, a metal with the same coefficient of expansion as Chromium-iron alloy “Carpen Ri2” manufactured by Technology Incorporated 7" is good.

Figure 13 shows another shape in which the glass of the face plate 16 has strain points and annealing points. When the distal ends of legs 162 and 162 are heated to a temperature between It is partially embedded in the glass of 6 at 168. This example is 1 34' and welded tension foil shadow mask 1 35 supporting flat ridges 160.

The support structure 134' (or 135') surrounds the centrally located fluorescent screen 20. It can be applied continuously (without breaks). On the other hand, this support structure has two This support is easily made from one (Fig. 12) or one metal strip (Fig. 13). The structure can be arranged along the four straight steel sections of the screen as shown in Figure 10. .

Figure 14.15 shows another form of the invention, which is similar to the strip plate of Figure 16.17. The legs are made from the ranks by shearing. In the example of Figure 12.13 The flat top of ridge 160' helps secure the shadow mask to support structure 35'. provide a means of determining A series of legs 162a' extend outwardly from one side of this portion 160'. and a series of legs 162b' extend outward from the opposite side of the section. , creating an alternating array. In this example, the opening 170 is located between adjacent legs of the metal strip. The attached chain part is punched out to facilitate the formation of the legs by shearing process and also to make it easy to form the legs. , removal or "trimming" of unwanted material that accumulates during the cleaning process ” is possible.

In detail, FIG. 16.17 shows a blank strip 172, from which the support structure 35 ' (Fig. 14.15) is formed. The opening 170 is first formed in a straight line parallel to the side edge of the strip. It is punched out as a target array. This blank is then placed between opening 170 and edge 176. The legs are then easily formed by shearing at 74. Opposite as shown in Figure 17 The side edges 178 are beveled at 180 so that the legs are out of the plane of the upper portion 160'. When bent, the edge of each leg is flush with the surface of the faceplate 16 to which it is fixed. It is made to be a row.

18.19 shows another implementation of the invention incorporated into a shadow mask support structure 134'. An example is shown. In this embodiment, the leg portion 162b' is shorter than the leg portion 162a'. 60', but with alternating legs 162a' facing toward the screen 20. inwardly or outwardly from screen 20 and outwardly relative to this portion 160'. It is similar to that of Figures 14-17 except that it is widened. This example is It also widens the stance for the support structure and section 160'.

22-28 show other implementations of tension foil shadow mask support structure 234. By way of example, Figure 25.28 shows another form of support structure 234', the differences being The only method is to secure the support structure to the faceplate 16.

Similar reference numerals are therefore used.

In detail, the support structure 234 (or 234') is shown in Figures 22.24 and 25.26. As shown, the corrugated members define flattened beaks 260 and valleys 262, respectively. Ru.

This support structure is made from long metal strips. The material is face plate 16 of Reading, Pennsylvania, which is a metal with the same coefficient of expansion as glass. Chromium and iron alloys involved in the production of Carpenter Technology Inc. “Carventer 27” would be good.

The flat upper part 263 of the peak part 260 is made coplanar with the groove as shown in FIG. for fixing the shadow mask 35 thereto by welding 264. give the means.

The flat valley 262 has a flat bottom surface 266 and these surfaces are coplanar so that the face A means is provided for securing the support structure to the inner surface of the plate 16. Figures 22-24 In this embodiment, the valleys 262 of the support structure 234 are made of hardened cement 268 (FIG. 24). It is fixed to the face plate 16. This cement is, for example, a well-known non-vitrified cement. Cold cement such as lath frit or Zarael crampon cement may be used. .

Figures 25 and 26 show the valleys 262 of the corrugated support structure 234' in the faceplate 16. when the glass is heated to a temperature between its strain point and annealing point. An example of fixing it to the faceplate 16 by partially embedding is shown. So A suitable process for performing implant fixation is described below.

Support structure for supporting a welded tension foil shadow mask according to the invention The structure 234 (or 234') is a cut in the metal as shown at 234 in FIG. It has a ring. On the other hand, this structure can be easily and inexpensively manufactured from metal strips into corrugated shapes. This structure has discontinuities (breaks) or segments as shown in Figure 21. A fluorescent screen that holds the shadow mask under tension on its structure. It can be made to extend in a straight line along the inside of the clean.

As mentioned above, the present invention includes a mask support such as 34 on the glass face plate 24. Also includes methods for securing the structure. Masses of various shapes are shown below. A support structure can be installed according to the present invention. Regardless of its shape, the mask support is The invention provides for permanent non-cement fixation of structures to faceplates. Therefore, it physically penetrates the faceplate, and the depth of the embedment is determined by the shadow. - The structure is able to resist the tension created by the mask. Also, scheduled Physical penetration of the structure at a depth of This is effective for placing the target at the planned Q distance.

In FIG. 27, 2. Face of face plate assembly similar to Figure 3 Plate 16 and mask support structure 334 are shown prior to assembly. shadow The mask support structure 334 is positioned relative to the inner surface 19 of the faceplate 16. The fluorescent screen 20 is attached to the center of the inner surface of the face plate. has been done.

Once in place, the support structures 334 will be on either side of the screen 20.

A part of the corner of the support structure 34 shown in FIG. 27 is articulated. What is a “joint”? The structure is loosely joined at some of its corners, i.e. the metal of the support structure and the face. bonded to accommodate the difference in coefficient of thermal expansion that may exist between the glasses of the base plate. means that it is This bond also holds the support structure in place during installation. Ru.

FIG. 28 details portions of support structure 334 and its relationship to faceplate 16. Show details. The support structure 334 is made of a metal plate and supports a shadow mask (not shown). It includes a mounting surface 380 for receiving and securing under tension.

The base portion 382 of the support structure 334 permanently attaches the support structure 34 to the faceplate 16. to the faceplate 16 a predetermined distance for permanent cement-free fixation. physically penetrated. The base portion 382 in this embodiment is attached to the face plate 16. It has two physically penetrating legs 38 and 386, shown in dotted lines. This support structure The implantation is such that the structure can withstand the tension generated by the shadow mask and the mounting surface The depth is such that the surface is a predetermined Q distance from the inner surface of the faceplate.

According to the present invention, the shadow mask support structure, which is made of metal, supports the face plate. Made of a material with a coefficient of thermal expansion compatible with glass. Pencil is a suitable metal. Manufactured by Carpenter Technology, Inc. of Reading, Lubania This is Carpenter Alloy 27 for construction. Other products with equivalent characteristics from other manufacturers Alloys can also be used.

At least the base of the support structure has a thermal expansion coefficient compatible with the glass of the faceplate. This base part can be made of Carpenter Alloy 27. Ru.

Alternatively, the entire structure may be made of Alloy 27.

FIG. 29 shows the support described above except for the foot 386 which has an aperture 388 with a plurality of open ends. 38 is a perspective view of a shadow mask support structure 384 that is similar in some respects to support structure 34; be.

The foot portion 386 having the opening 88 is a support structure for the inner surface 90 of the face plate 392. 384, such as a non-vitrified glass frit. Provides an edge that can be glued with ment. According to the invention, this leg and its opening are face spray by physically penetrating spray plate 392 a predetermined distance; It also facilitates cement-free fixation of the support structure 384 to the support structure 392. .

FIG. 29A shows the foot portion 386 of the support structure 384 in detail. In this example, the foot 386, the base of the support structure 384 has a depth greater than the thickness of the base, e.g. Physically penetrate the intended distance. The support structure 84 is permanently fixed by glass. This is achieved by "wetting" the metal, which creates an interface between the metal and the glass. Glue at surface 393. The base metal and glass are suitable for obtaining such adhesion. The temperature must be maintained at a certain temperature, which will be discussed later. gold forming the support structure The thickness of the metal plate is, for example, 24 mils. With this thickness of material, the penetration depth of the foot is It is within the range of 30-40 mils. This range is not limited, but the penetration depth is the support structure 3 at a predetermined distance Q from the inner surface 390 of the faceplate 392. 84 to the inner surface of the face plate at a depth suitable for placing the mask mounting surface 389. It also depends on the embedding of the support structure. This penetration depth range is, for example, a fraction of a mil. from 150 mils or more, depending on the shape of the support structure.

It has a novel support structure suitable for physically penetrating the faceplate according to the present invention. Another embodiment of the front assembly is shown in FIG. The corners of the front assembly 394 and its associated support structure 395 have become part of the Part of it is shown. The embodiment of FIG. Another example is shown in which the support structure is primarily made of ceramic. It is made of The faceplate assembly 394 has a fluorescent screen in the center. 400 including a faceplate 396 having an inner surface 398 with a diameter of 400 mm. This support structure The structure has four ceramic rails placed on opposite sides of the screen 400. However, two of these rails, 402A and 402B, are shown in this figure. Leh 402A and 402B have caps 404A and 404B, respectively. cap 4 04A and 404B are in tension to receive and fix the shadow mask 406. Consists of separate metal strips that provide a mounting surface for the wearer. Base of rails 402A and 402B Base portions 408A and 408B are permanent, cemented support structures to the faceplate. Physically attach the glass of the face plate 391 by a predetermined distance for fixation without using The dotted line indicates that the area penetrates the area. This support structure is suitable for bonding to glass. It has a similar composition. Some examples of this ceramic support structure Penetration of structure 395 into face plate 396 (face plate 396) For example, the planned distance is about a fraction of a mil because it is fixed without using cement. . In other instances, the penetration depth is greater, but it depends on the physical design of the structure and The depth is such that mounting surfaces 404A and 404B are at the inner surface 398 of faceplate 396. 398 to the planned distance so that the mounting surface is in the proper relationship with the inner surface 398. Is it something that allows you to take the test 406 in a state of tension? It depends.

Another embodiment of a shadow mask support structure that can be installed according to the present invention is shown in FIG. . Here, a tension similar to that shown in Fig. 13 is attached to the inner surface of the face plate. A portion of the foil shadow mask support structure is shown. The support structure 510 It has a mounting surface 512 for receiving and fixing the dorm mask 5]4 under tension. do. The support structure is lowered from multiple mounts to secure the support structure against the tension caused by the mask 514. to be established. Legs 516A and 516B are alternately spread outward from mounting surface 512. There is. Base portions 518 of legs 516A and 516B are provided with face plates according to the present invention. For permanent, non-cement fixation of support structure 510 to physically penetrates the inner surface 520 of the base plate 522 a predetermined distance.

The present invention provides a shaft suitable for physically penetrating a faceplate a predetermined distance. Another embodiment of the domask support is shown in FIG. This structure is the same as the one in Figure 22. It also has a corrugated member defining a flat peak 526 and a flat valley 528; The flat upper part of the mask part 526 serves as a mounting surface that receives and fixes the mask under tension. give. The troughs 528 penetrate the glass on the inner surface 524 of the faceplate 532. . The support structure 524 is formed from a long strip of metal, which is Carpenter Alloy 27 described above. It is good.

Flat glass faceplate with fluorescent screen area in the center of the inner surface To secure the supporting structure of the foil shadow mask under tension against The method of the present invention consists of the following steps. In other words, shadow mask in tension state A mounting surface and face plate suitable for securing the mask to receive and support the mask. forming a frame-like support structure with a base portion penetrating the glass; Heat the faceplate to a predetermined temperature within the range between the point temperature and the annealing point temperature. rendering the faceplate penetrable to the support structure by locating support structures on both sides of the lean and positioning them against the inner surface of the glass; The support structure is heated from the inner surface by heating the support structure to the work point temperature using electrical resistance. The base of the mask will fade against the tension created by the mask. Permanently affix the support structure to the spray plate and create a predetermined Q-distance from the inner surface of the face. penetrating to a depth effective to position the mounting surface at a remote location; . As a result, the mounting surface is properly spaced from the inner surface of the faceplate. After receiving the shadow mask in the state of is positioned to place the foil mask in tension on the mounting surface. .

Regarding the adjustment of the face plate, the face plate for installation of the support structure according to the invention is A suitable temperature range for the spray plate glass is e.g. 462°C - standard face plate. between the strain point of standard glass and 563°C - the annealing point of standard glass. . This temperature is standard for the glass used in color cathode ray tube faceplates. It includes a standard range. Use the auto to bring the cold faceplate to the desired temperature. Heating inside the oven can be used. Alternatively, as a more economical method, To install the support structure according to lighting, the face plate is removed from the mold and then annealed. You can do this before putting it in the oven. During this time, the faceplate is heated to the desired temperature. It is then cooled down to a range of 30 to 30°C, during which time support structures can be installed.

Regarding the temperature of the support structure press-fitted into the inner glass according to the invention, the carpenter - In the case of Alloy 27, it is heated to about 1000°C, which is the work point of the face plate. Should be. This corresponds to red heat for Carpentz 2F alloys. support structure If the structure is made of metal, heating to the appropriate temperature can be done by electrical resistance or by induction. Alternatively, it may be done in an oven. The temperature at which the support structure and glass are heated is contact surfaces necessary for proper attachment and permanent fixation of the support structure to the spray plate. It is good if it gives a feeling of "wetness". Furthermore, it is not supported at the temperatures and temperature ranges mentioned above. The base portion of the structure can easily penetrate the glass of the faceplate.

FIG. 33 shows a device suitable for penetration according to the invention of a support structure to a face plate. It shows. For example, the support structure 334 is the structure of FIG. 27.28. This structure is Base portion 3 having two legs 384 and 386 that penetrate into face plate 16 Contains 82. The means of physical penetration is indicated by arrow 536. The base of the support structure 334 on the glass of the inner surface 19 of the faceplate 16 according to the invention It has a metal plate 534 showing the physical penetration of portion 382. Sims 538 and 540 are support to place the mounting surface of the structure at a predetermined Q-distance from the inner surface 19 of the base plate 16. Control the penetration depth of the structure. for its proper position on the inner surface of the faceplate. The positioning of the support structure is such that the support structure 334 is held and the face plate 16 is positioned during heating. This is achieved by a suitable jig which brings it into proper alignment when lowering it onto the inner surface 19 of the Vine. The configuration of such fixtures for all support structures is used in the field of cathode ray tube manufacturing. is within the ability of a person skilled in the art.

FI G, 5 FIG.6 FIG.7 FIG.8 FIG. 8a FIG. 23 international search report

Claims (30)

[Claims] 1. It has a corrugated cross section, and the fluorescent screen in the center of the inner surface of the faceplate is virtually A shadow that surrounds the target and supports the shadow mask in tension above it. a mask support structure and a means for securing the corrugated structure to the faceplate. Front assembly for color cathode ray tubes including faceplate. 2. The corrugated structure supports the shadow mask thereon in tension. to have peaks arranged in a common plane to provide a means for An assembly according to claim 1. 3. The corrugated structure is arranged in a common plane to fix it to the faceplate. 2. An assembly as claimed in claim 1, further comprising a trough located within the trough. 4. The corrugated structure is configured to support the shadow mask in tension thereon. In order to provide a means for 4. An assembly according to claim 3, wherein the assembly is completely sized. 5. The peaks or valleys of the waveform structure are each flat in one common plane. 5. An assembly as claimed in claim 2, 3 or 4, characterized in that: 6. The corrugated member consists of a metal strip, and the fixing means are welding means or hardened cement. An assembly according to any one of claims 1 to 5, wherein the assembly is a component. 7. The corrugated structure has a plurality of wavy structures substantially surrounding the centrally located fluorescent screen. 7. An assembly according to any preceding claim, wherein the assembly is one of the corrugated structures. 8. The faceplate is glass and the corrugated structure is such that the glass When the temperature is in the range between the annealing point and the annealing point, the structure is partially Claim 1, wherein the face plate is fixed to the face plate by being embedded in the face plate. 8. The assembly according to any one of items 7 to 7. 9. The support structure has a corrugated member defining upper and lower corrugated edges, the lower corrugated edge being a ferrule. means for securing the support structure to the base plate, with the upper corrugated edge shadowing the support structure. - An assembly according to claim 1, further comprising means for securing a mask. 10. The corrugated member has a substantially uniform width, and the upper corrugated edge is adjacent to the face plate. 9. The assembly of claim 8, wherein the assembly is arranged in a plane substantially parallel to the seat. 11. the corrugated member comprises a metal strip, the sides of the strip being flat; An assembly according to claim 9 or 10. 12. extending along the upper edge and therefor securing the shadow mask; Claims 9 and 10 further comprising a cap means having a land portion which is higher than the land portion. is the assembly described in 11. 13. The land portion of the cap means is located closest to the centrally located fluorescent screen. 13. The set of claim 12, wherein the set is arranged along an inner side of the upper corrugated edge. Three-dimensional. 14. a plurality of said corrugated members and substantially surrounding said centrally located fluorescent screen; and includes respective cap means that come together at the corner portions of the screen; A claim in which the outside of the cap means is chamfered at the corner. The assembly according to 12 or 13. 15. The cap means is generally U-shaped with legs overlapping the sides of the corrugated member. 15. The assembly according to claim 12, 13 or 14, wherein: 16. The corrugated member and the cap means are metal, and the leg of the cap means 16. The assembly of claim 15, wherein said corrugated member is secured to said corrugated member by welding means. body. 17. Shadow mass on the inner surface of the faceplate with a fluorescent screen in the center while fixing the screen under tension and removing the shadow mask from the screen. a shadow mask support structure for separating the shadow mask; the upper part for fixing it and said upper part for stabilizing this supporting structure a series of legs extending outward from each side in opposite directions; Front assembly for color cathode ray tube including face plate. 18. The legs alternately extend outward from the upper portion in opposite directions. 18. The assembly of claim 17. 19. The support structure consists of a metal strip with a flat ridge at the top of the upper portion. and the legs are spread outward from this ridge in an alternating manner on each side thereof. 19. An assembly according to claim 17 or 18, wherein the assembly is made of 20. Alternate ones of said legs are in the plane of said upper part and the remaining legs are in said upper part. outward from the flat part of the side, so that it is angled towards said screen. 18. The assembly of claim 17. 21. The support structure may be formed by stamping a substantially flat strip blank. 21. The assembly of claim 20. 22. The faceplate is glass, and the support structure is such that the glass At a temperature between the strain point and its annealing point, partially attach the far end of said leg to the glass. Claim 1, wherein the face plate is fixed to the face plate by being embedded in the face plate. The assembly according to any one of items 7 to 21. 23. The distal end of said leg is fixed to said flat plate means and said flat plate means. Once the faceplate means is fixed to said faceplate by hardening cement. 22. An assembly according to any one of claims 17 to 21. 24. Glass faceplate with inner surface with fluorescent screen in the center and is attached under tension to the mask support structures placed on both sides of this screen. a foil shadow mask that is attached to the mask support structure; the faceplate to a depth such that it resists the tension caused by the physical permanent, non-cemented support structure fixation to the faceplate. Face plate assembly for color cathode ray tubes. 25. The support structure is made of an alloy or an alloy having a coefficient of thermal expansion compatible with the glass. 25. The assembly of claim 24, comprising a ceramic material. 26. The support structure includes a table that receives and fixes the shadow mask under tension. securing the support structure to a surface and the faceplate; and attaching the mounting surface to the faceplate. by the intended depth to position it at the intended Q distance from the inner surface of the splatter. a base portion that physically penetrates the face plate; The assembly according to item 24 or 25. 27. For receiving and fixing the foil shadow mask in tension, Physically penetrates the mounting surface and glass faceplate suitable for securing the mask providing a frame-like support structure having a base portion configured to At least the surface is heated to a temperature that will provide conditions for penetrating the support structure. the step of preparing the face plate in a state in which the face plate is The inner surface has an area for a fluorescent screen in the center, and the supports are arranged on both sides of the screen. A holding structure is pushed into the face plate from the inner surface so that its base portion is pushed into the face plate. securing the structure to the faceplate against the tension created by the mask; and positioning the mounting surface at a predetermined distance from the inner surface, and Therefore, the mounting surface is attached to the shadow mask with an appropriate gap to the inner surface. positioned for receiving in a tensioned state; After attaching the fluorescent screen, the mask is placed in tension on the mounting surface. The shadow mask is attached to a glass face plate with steps for attaching it. A method of fixing support structures that are supported under tension. 28. The planned temperature of the face plate is based on the strain point temperature of the glass and the annealing temperature. 28. The method according to claim 27, wherein the temperature is between 462°C and 503°C. . 29. heating said support structure to a predetermined temperature and pre-heating said heated structure; the mounting surface onto the heated glass of the face plate. Claim further comprising: positioning the spray plate a predetermined distance from the inner surface of the spray plate. The method according to item 27 or 28. 30. The predetermined temperature of the support structure is the operating point of the faceplate glass. 30. The method of claim 29, wherein the temperature is approximately equal to about 1000<0>C.