JP5012479B2 - Method for manufacturing plasma display panel - Google Patents

Description

  The present invention relates to a method for manufacturing a plasma display panel, and more particularly to a method for manufacturing a plurality of glass substrates from a large-sized substrate glass.

  As a display device that can display high-definition television images on a large screen because it can display at high speed and can be easily enlarged compared to a liquid crystal panel, the phosphor is excited and emitted with ultraviolet light by rare gas discharge. A display device using a plasma display panel (hereinafter referred to as “PDP”) that displays an image is put into practical use and is widely used in large quantities. The PDP is particularly attracting attention as a large-screen display device for high-definition television, and further development is being made to improve display quality such as higher definition and higher brightness, higher reliability, and lower cost.

  The PDP has a structure in which a front plate and a back plate made of a glass substrate or the like are arranged facing each other and hermetically sealed, and a discharge gas is enclosed in a discharge space formed inside. The PDP having such a structure is provided with an exhaust pipe for exhausting the discharge space once and sealing the discharge gas in the space after the front plate and the rear plate are hermetically sealed. 2. Description of the Related Art Conventionally, a glass substrate for a back plate when manufacturing a PDP is cut into a single plate size and has a structure in which a through-hole for arranging an exhaust pipe is provided at a corner (see, for example, Patent Document 1). .

In addition, in order to improve production efficiency, the multi-chamfer mother substrate glass is cut along the cutting line to obtain an even number of single-plate glass substrates in two rows, and through holes for exhaust pipes are provided on the outer periphery. A method for manufacturing the provided PDP is disclosed (for example, see Patent Document 2).
JP 2001-283741 A JP 2006-318854 A

  In order to increase the production efficiency of PDP and reduce the manufacturing cost, as described in Patent Document 2, a single large-size substrate glass (mother) formed by arranging a plurality of single-plate glass substrates. A so-called multi-sided method is useful in which a PDP component is formed using a substrate glass and then cut into a single-plate glass substrate.

  However, in the case of applying such a multi-face machining method, the position of the through hole where the exhaust pipe is provided is important. The through-hole must be pre-processed into a large-sized mother substrate glass. However, especially when the number of multi-faces is increased with a large plate, the substrate glass may break or break depending on the position of the through-hole. This is likely to occur and the manufacturing yield is reduced.

  In view of the above problems, an object of the present invention is to provide a method for manufacturing a PDP that is inexpensive and can be easily multi-faced without cracking or breaking the substrate glass.

In order to achieve the above object, the present invention provides a PDP in which a pair of glass substrates are arranged to face each other to form a discharge space, and at least one glass substrate is provided with a through-hole that encloses a discharge gas in the discharge space. A method of preparing a single substrate glass that can be cut into at least 3 rows and 3 columns, a position that is point-symmetric with respect to the center point of the substrate glass, and the substrate glass a processing step of forming a through hole of the glass substrate at a predetermined position of, seen including a step of forming a PDP construct the substrate glass, the processing step, the glass substrate having a center point that coincides with the center point of the substrate glass The through-hole is not provided, and the predetermined position is a position that is the shortest distance from the edge of the substrate glass in each glass substrate .

  According to such a method, the position of the through-hole to be provided is a point-symmetrical position with the center of the substrate glass as the center of symmetry, and is located at the shortest distance from the side of the substrate glass. Can be easily processed to prevent breakage and breakage of the substrate glass, and a multi-sided construction method can be realized with a high yield. Further, even when the PDP components are formed, there is no influence of heat distortion due to heating, and the occurrence of cracks in the substrate glass can be suppressed.

Furthermore, in the processing step, it is desirable not to provide a through-hole in the glass substrate surrounded by four sides by a cutting line for cutting the substrate glass into at least 3 rows and 3 columns of glass substrates. According to such a method, the processing region where the through hole is formed can be a peripheral portion of the substrate glass with little bending, and the occurrence of cracking of the substrate glass can be suppressed.

Further, the diameter of the through hole provided in the glass substrate 4 side in cutting line for cleaving the substrate glass at least three rows and three columns or more of the glass substrate surrounded it, is preferably smaller than the other through hole. According to such a method, since the stress with respect to the center part of the substrate glass can be reduced in the through-hole forming step, the substrate glass can be prevented from cracking.

  According to the method for producing a PDP of the present invention, it is possible to prevent the substrate glass from being cracked or broken, and to realize a multi-surface machining method with a high yield.

Hereinafter, a method for manufacturing a PDP according to an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a cross-sectional perspective view showing the structure of a PDP according to the PDP manufacturing method in Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional perspective view showing the configuration of the main part near the exhaust port of the PDP.

  As shown in FIG. 1, the PDP is composed of a front plate 5 and a back plate 10. The front plate 5 includes a display electrode pair 2 formed in a stripe shape on one surface of the glass substrate 1, a dielectric film 3 covering the display electrode pair 2, and a protective film 4 provided on the dielectric film 3. Yes. The back plate 10 is provided so that the data electrode 7 formed in a stripe shape on one side of the glass substrate 6, the base dielectric film 8 covering the data electrode 7, and the data electrode 7 sandwiched between the base dielectric film 8, A stripe-shaped partition wall 9 that partitions the discharge space and a phosphor film 11 that emits red, green, and blue light sequentially applied to the grooves between the partition walls 9 are provided. The PDP has a structure in which the front plate 5 and the back plate 10 are arranged so that the display electrode pair 2 and the data electrode 7 face each other, and the peripheral portion is sealed with a sealing member made of low-melting glass or the like. The discharge space formed by the barrier ribs 9 is filled with a discharge gas (Ne—Xe gas or He—Xe gas). The intersection between the display electrode pair 2 and the data electrode 7 becomes a discharge cell. The discharge cells arranged in a matrix and having the red, green, and blue phosphor films 11 become pixels for color display.

  In the sustain discharge period, the PDP generates a discharge by applying a pulse voltage between the display electrode pair 2, and ultraviolet rays generated by the discharge excite the phosphor of the phosphor film 11 to be converted into visible light. Light or light passes through the protective film 4 and the dielectric film 3 to display an image or video.

  As shown in FIG. 2, the front plate 5 and the back plate 10 are sealed by a sealing member 15 (also referred to as frit glass) whose outer peripheral edge is made of low melting glass or the like. In addition, through holes 21 are provided at the corners of the glass substrate 6 of the back plate 10 in communication with the discharge space formed by the barrier ribs 9, and the exhaust pipes 16 are connected to the through holes 21. The inside of the discharge space is evacuated by the exhaust pipe 16, and then the discharge gas is introduced from the exhaust pipe 16 and finally the exhaust pipe 16 is sealed off by chip-off. For example, in the case of a 42 inch diagonal PDP, the glass substrate 6 is a high strain point glass having a size of about 1000 mm × 550 mm and a thickness of about 3 mm.

  FIG. 3 is a plan view of substrate glass 30 obtained by the method for manufacturing a PDP according to Embodiment 1 of the present invention. Twelve glass substrates 6 are obtained from the substrate glass 30, and each through-hole 21 is provided in the substrate glass 30 at a predetermined position corresponding to each glass substrate 6.

  One substrate glass 30 is cleaved along a cleaving line 34 that is cleaved in the column direction and a cleaving line 35 that is cleaved in the row direction, and is composed of 12 pieces in total, 4 pieces in the row direction and 3 pieces in the column direction. It has a large size enough to be divided into glass substrates 6.

  Next, a method for manufacturing the back plate 10 of the PDP by the multi-face machining method will be specifically described. The through-hole 21 is formed by a diamond drill or the like at a predetermined position of the substrate glass 30 that can be cut into the glass substrate 6 having a predetermined size. After removing the cuts associated with the openings, a photosensitive Ag paste as a base material of the data electrode 7 is uniformly applied to the surface of the substrate glass 30 by a die coating method. Then, after exposure through a photomask having a predetermined pattern corresponding to the pattern shape of the data electrode 7, the pattern of the data electrode 7 is formed by developing. Then, the data electrode 7 is produced by baking and solidifying.

  A base dielectric film 8 that covers the data electrode 7 is formed on the substrate glass 30 on which the data electrode 7 is manufactured by a die coating method or the like. A partition material layer is applied on the substrate glass 30 on which the base dielectric film 8 is formed. The partition wall material layer is a photosensitive resin composed of an inorganic additive powder composed of low melting point glass, a filler, an organic additive composed of a photocurable resin, a binder, a solvent, and the like. After exposure through a photomask having a predetermined pattern corresponding to the pattern shape of the partition wall 9, development is performed to produce a pattern of the partition wall 9. Then, the partition wall 9 is formed by baking and solidifying.

  Thereafter, red, green, and blue phosphor films 11 are sequentially formed in the grooves between the barrier ribs 9 to complete the production of all components necessary for the back plate 10 on the surface of the substrate glass 30.

  Finally, 12 back plates 10 are obtained by cleaving the substrate glass 30 along the cleaving lines 34 and the cleaving lines 35. According to such a multi-chamfering method, a plurality of PDP components can be manufactured in a lump so that the production efficiency is increased. In the above description, the substrate glass 30 is cleaved in the last step. However, the substrate glass 30 may be cleaved after the formation of the base dielectric film or the partition wall, for example, according to the convenience of the equipment.

  Next, the position of the through hole 21 formed in the substrate glass 30 will be described in detail with reference to FIG. The through-holes 21 provided in the substrate glass 30 to be the respective glass substrates 6 are point-symmetrical positions with the center O of the substrate glass 30 as the center of symmetry and a shortest distance from the edge of the substrate glass 30. Is provided.

  That is, as shown in FIG. 3, when each glass substrate 6 divided into 4 rows and 3 columns is set to glass substrates 31a to 31d, 32a to 32d, and 33a to 33d in the row direction, the glass substrate 31a and the glass substrate 33d. Each of the through-holes 21 is provided so as to be point-symmetric with respect to the center O of the substrate glass 30 on the symmetry axis 70. Further, the glass substrate 31b and the glass substrate 33c, the glass substrate 31c and the glass substrate 33b, and the glass substrate 31d and the glass substrate 33a are also point-symmetrical positions with respect to the center O of the substrate glass 30 on the respective symmetry axes 71, 72, and 73. It has become.

  Further, the through hole 21 of the glass substrate 32 a and the through hole 21 of the glass substrate 32 d are similarly point-symmetric with respect to the center O of the substrate glass 30 on the symmetry axis 74. Further, the glass substrate 32 b and the glass substrate 32 c are point-symmetrical with respect to the center O of the substrate glass 30 on the symmetry axis 75.

  Further, each through-hole 21 is provided at a predetermined position that is the shortest distance from the edge of the substrate glass 30. That is, the through holes 21 are provided at the corners of the glass substrates 6 of the respective back plates 10, and the distances A and B from the end sides of the respective glass substrates 6 are defined. In the present invention, while securing the distance A and distance B, the through holes 21 of the respective glass substrates provided in the substrate glass 30 are connected to either one of the end sides 76a, 76b, 76c, and 76d of the substrate glass 30. The shortest distance from the side is set. That is, in FIG. 3, the glass substrates 31 a, 31 b, 31 c, and 31 d that are the peripheral regions of the substrate glass 30 are provided at the shortest distance A from the end side 76 b of the substrate glass 30. Similarly, the glass substrates 33a, 33b, 33c, and 33d are provided at the shortest distance of a predetermined distance A from the end side 76d. Further, the glass substrate 32a and the glass substrate 32d, which are also peripheral regions, are provided at the shortest distance B from the end side 76a and the end side 76c, respectively.

  On the other hand, in the glass substrate 32b and the glass substrate 32c in which the glass substrate is surrounded by the four sides of the breaking line 34 and the breaking line 35, the substrate glass 30 is secured while securing the predetermined distances A and B from the end sides of the respective glass substrates 32b and 32c. A through hole is provided at a position of a distance E that is the shortest distance from the end side 76a and a distance F that is the shortest distance from the end side 76c.

  FIG. 4 is a plan view of another substrate glass 30 for comparing the PDP manufacturing method according to the embodiment of the present invention. In FIG. 4, the glass substrate 31 a, 31 b, 31 c, 31 d that is the peripheral region of the substrate glass 30 is provided with a through hole 21 at the same position as in FIG. 3. However, in the glass substrate 32b in which the glass substrate is surrounded by the four sides of the breaking line 34 and the breaking line 35, the distance G from the end side 76b of the substrate glass 30 is the same as the distance from the end side 76d in FIG. The distance from the side 76a is a distance H larger than the distance E in FIG. Similarly, in the glass substrate 32c, the distance G from the end side 76d of the substrate glass 30 is the same as the distance from the end side 76d in FIG. 3, but the distance from the end side 76c is larger than the distance F in FIG. H.

  Therefore, in the case shown in FIG. 4, the movement distance of the processing tool from the end side of the substrate glass 30 becomes long, which is not preferable, and the through hole 21 may be formed at a position where the distance to the end side of the substrate glass 30 is short. desirable.

  As described above, according to the method for manufacturing a PDP in the embodiment of the present invention, the through-holes 21 can be dispersed around the substrate glass 30 and the processing can be performed in the peripheral portion where the substrate glass 30 is less bent. . Therefore, the processing of the through-hole 21 is easy, and even when the PDP component is formed, there is no influence of thermal distortion due to heating, and the occurrence of cracks in the substrate glass can be suppressed. Furthermore, since the through-hole 21 is disposed at a point-symmetrical position with the center of the substrate glass 30 as the center of symmetry, the opening treatment of the through-hole 21 can be performed only by rotating the substrate glass 30 by 180 degrees. Tact can be improved.

(Embodiment 2)
FIG. 5 is a plan view of substrate glass 40 obtained by the method for manufacturing a PDP in the second embodiment of the present invention. The second embodiment is different from the first embodiment in that the through holes 21 are not provided in the glass substrates 42b and 42c surrounded by the cutting lines 34 and 35 on all four sides. Similar to the first embodiment, the other glass substrates are provided with through holes 21 at point-symmetric positions with the center of the substrate glass 40 as the center of symmetry.

  In the second embodiment of the present invention, the glass substrates 42b and 42c, all four sides of which are surrounded by the breaking lines 34 and 35, are provided with through holes by a conventional machine tool after the breaking. As a result, it becomes possible to perform processing with a conventional machine tool and jig, and even if the number of processing steps of the through-hole 21 is increased, it is possible to share and standardize the jig, and simplify and simplify the apparatus.

In particular, when the glass substrates are arranged in 3 rows and 3 columns and each glass substrate has one through-hole, there is no point-symmetric through-hole in the glass substrate disposed in the center of the substrate glass. It will be. In such a case, it is effective to apply the second embodiment of the present invention.

(Embodiment 3)
FIG. 6 is a plan view of substrate glass 50 produced by the method for manufacturing a PDP in the second embodiment of the present invention. The third embodiment is different from the first and second embodiments in that the glass substrates 52b and 52c in which all four sides are surrounded by the breaking lines 34 and 35 are not surrounded by the breaking lines 34 and 35. The point is that a through hole 53 having a smaller diameter than the through hole 21 of the substrate is provided. Similar to the first embodiment, the other glass substrates are provided with through holes 21 at point-symmetric positions with the center of the substrate glass 50 as the center of symmetry.

  Thereby, in the process of the through-hole 53, since the stress with respect to the center part of the substrate glass 50 can be reduced, the crack of the substrate glass 50 can be prevented.

  In the above description, the case where one through-hole is provided in the glass substrate has been described, but the same effect is exhibited even in a configuration having two or more through-holes on the same side of the glass substrate. Moreover, in the above embodiment, the example in which the through-hole is provided in the glass substrate constituting the back plate has been described, but the case where the through-hole is provided in the glass substrate of the front plate or the case in which the through-hole is provided in both is also described. Applicable.

  In the present invention, the PDP has been described, but it goes without saying that the present invention can also be applied to a liquid crystal display panel or the like.

  According to the method for producing a PDP of the present invention, a display panel can be produced by a multi-cavity method with a high yield by preventing breakage and breakage of the substrate glass, which is useful as a method for producing a large area display panel.

Sectional perspective view which shows the structure of PDP by the manufacturing method of PDP in Embodiment 1 of this invention Cross-sectional perspective view showing the configuration of the main part near the exhaust port of the PDP Plan view of substrate glass by manufacturing method of the same PDP Plan view of another substrate glass for comparing the manufacturing method of the PDP The top view of the substrate glass by the manufacturing method of PDP in Embodiment 2 of this invention The top view of the substrate glass by the manufacturing method of PDP in Embodiment 2 of this invention

Explanation of symbols

1, 6, 31a, 31b, 31c, 31d, 32a, 32b, 32c, 32d, 33a, 33b, 33c, 33d, 42b, 42c, 52b, 52c Glass substrate 2 Display electrode pair 3 Dielectric film 4 Protective film 5 Previous Face plate 7 Data electrode 8 Base dielectric film 9 Partition 10 Back plate 11 Phosphor film 15 Sealing member 16 Exhaust pipe 30, 40, 50 Substrate glass 21, 53 Through-hole 34, 35 Break line 70, 71, 72, 73, 74, 75 Axis of symmetry 76a, 76b, 76c, 76d

Claims (3)

A method for producing a plasma display panel, wherein a pair of glass substrates are arranged opposite to each other to form a discharge space, and a through-hole for sealing discharge gas in the discharge space is provided at a corner of at least one of the glass substrates,
A step of preparing one substrate glass that can be cut into at least 3 rows and 3 columns, a position that is point-symmetric with respect to a center point of the substrate glass, and a predetermined position of the substrate glass; a processing step of providing the through hole of the glass substrate, viewed including the step of forming a structure of a plasma display panel on the substrate glass, and in the processing step, having a center point which coincides with the center point of the substrate glass A method for manufacturing a plasma display panel , wherein a through-hole of a glass substrate is not provided, and the predetermined position is a position that is the shortest distance from an edge of the substrate glass in each glass substrate . The said through-hole is not provided in the said glass substrate by which the four sides are surrounded by the cutting line which cleaves the said board | substrate glass into the said glass substrate of at least 3 rows 3 columns or more in the said process process, It is characterized by the above-mentioned. The manufacturing method of the plasma display panel of description. A diameter of a through-hole provided in the glass substrate that is surrounded by a cutting line for cutting the substrate glass into at least 3 rows and 3 columns of glass substrates is smaller than the other through-holes. The method for manufacturing a plasma display panel according to claim 1.

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