JP2007324040A - Flat display device, manufacturing method thereof, and sealing frame - Google Patents

Abstract

The present invention provides a flat panel display device excellent in spacer assemblability, a manufacturing method thereof, and a sealing frame capable of facilitating the manufacturing of the flat panel display device.
A back panel on which an electron source is formed, a front panel on which a phosphor that emits light upon receiving electrons emitted from the electron source is formed, and both substrates disposed between the back panel and the front panel. In a flat panel display device having a plurality of spacers for supporting airtightness and a sealing frame for hermetically sealing between a back panel and a front panel, insertion of spacer ends into the sealing frame in the direction in which the spacers are arranged A groove is provided, and the width of the groove is made larger than the thickness of the spacer. And it aligns with one end surface of a groove | channel, inserts the edge part of a spacer, and fixes it with an adhesive agent.
[Selection] Figure 1

Description

  The present invention relates to a flat display device, a manufacturing method thereof, and a sealing frame used in the flat display device.

  In recent years, with high image quality of information processing equipment or television broadcasting, it has high luminance and high definition characteristics, and can be reduced in weight and space, so it is interested in flat panel display (FPD). Is growing. Typical examples of the flat display device are a liquid crystal display device and a plasma display, and a field emission display (hereinafter referred to as FED) which has been attracting attention recently.

  The FED is a self-luminous display device having an electron source in which electron-emitting devices are arranged in a matrix. Known electron-emitting devices include surface conduction electron-emitting devices (SED type), field emission devices (FE type), metal / insulating film / metal-type emitting devices (MIM type), and the like. As the FE type, a spin type made of a metal such as molybdenum or a semiconductor material such as silicon, or a CNT type using a carbon nanotube as an electron source are known.

  In the FED, it is necessary to provide a space between the rear panel on which the electron source is formed and the front panel on which the phosphor that emits light when excited by the electrons emitted from the electron source is formed, and to keep this part in a vacuum atmosphere. There is. For this purpose, a sealing frame is provided on the inner peripheral edge of the back panel and the front panel. Further, a support member called a spacer is disposed between the panels so that the space portion maintained in a vacuum can withstand atmospheric pressure.

  Patent Documents 1 to 4 describe the structure or arrangement of spacers.

Japanese Patent Laying-Open No. 2005-302373 JP 2005-285613 A Japanese Patent Laid-Open No. 2003-346689 JP-A-9-190786

  In the FED, since the spacer blocks the display area, it is required to make the thickness as thin as possible and to arrange the spacer at a predetermined position as accurately as possible. Further, since the spacer is thin, it is required to be disposed substantially perpendicular to the front panel and the rear panel in order to enhance the effect of strength reinforcement.

  The objective of this invention is providing the sealing frame which can make manufacture of a flat display apparatus excellent in the assembly property of a spacer, its manufacturing method, and a flat display apparatus.

  The present invention provides a back panel on which an electron source is formed, a front panel on which a phosphor that emits light upon receiving electrons emitted from the electron source is formed, and both substrates disposed between the back panel and the front panel. And a sealing frame for hermetically sealing between the back panel and the front panel, a spacer end on the sealing frame in a direction in which the spacer is arranged The groove has a width greater than the thickness of the spacer, and is aligned with one end face of the groove, and the end of the spacer is inserted and fixed with an adhesive. .

  The present invention also provides a plurality of spacers disposed between a rear panel on which an electron source is formed and a front panel on which a phosphor that emits light upon receiving electrons emitted from the electron source is formed. In the method for manufacturing a flat display device in which the peripheral edge of the front panel is sealed with a sealing frame, an insertion groove for the spacer end is formed in the sealing frame on the side where the end of the spacer is located, and the width of the groove Is made larger than the thickness of the spacer, the spacer end portion is inserted in alignment with one end face of the groove, and the groove and the spacer are fixed with an adhesive.

  Further, the present invention is used in a flat display device having a spacer between a back panel on which an electron source is formed and a front panel on which a phosphor is formed, and hermetically seals between the back panel and the front panel. The sealing frame has an insertion groove at the end of the spacer, and the width of the groove is larger than the thickness of the spacer.

  Further, the present invention is used in a flat display device having a spacer between a back panel on which an electron source is formed and a front panel on which a phosphor is formed, and seals between the back panel and the front panel. The retaining frame has an insertion groove at the spacer end, the width of the groove is larger than the thickness of the spacer, the spacer end is inserted in alignment with one end face of the groove, and the spacer end is the sealing frame And a sealing frame with a spacer, which are bonded and integrated by an adhesive.

  The spacer can be installed at a predetermined position, and the assembly work of the flat display device is facilitated by integrating the spacer and the sealing frame.

  Embodiments of the present invention will be described below with reference to the drawings. However, it is not limited to the form described below.

  FIG. 1 shows a configuration example of a spacer and a sealing frame in the flat display device of the present invention. (A) And (b) is a top view, (c) is the side view which expanded and showed the part enclosed in the circle of (b) in detail. 2A and 2B show another configuration example of the spacer and the sealing frame. FIG. 2A is a plan view showing the overall configuration, and FIG. 2B is a plan view showing the details of the circled portion of FIG. FIG. These drawings will be described later.

  FIG. 3 shows a structure of a general FED, and shows a cross-sectional view seen from the direction of the AA line of FIG. FIG. 4 is a cross-sectional view showing a part of the FED shown in FIG. 3 in detail.

  As shown in FIGS. 3 and 4, in the FED, the back panel 110 has signal lines (data lines, cathode electrode lines) 112 and scanning lines (gate electrode lines) 113 on the inner surface of the back substrate 111. An electron source 114 is formed near the intersection of the signal line and the scanning line. In the front panel 120, a light shielding film (black matrix) 122, an anode (metal back) 123, a phosphor layer 124, and the like are formed on the inner surface of the front substrate 121.

  A sealing frame 140 is provided on the inner peripheral edge of the back substrate 111 and the front substrate 121, and the sealing frame, the back substrate and the front substrate are bonded together with a sealing agent to form a sealing adhesive layer 145. As a result, a space portion is formed between the back panel and the front panel. This space portion is held in a vacuum atmosphere and becomes a display area 150. In the back panel and the front panel, an insulating film is formed on the surface to be bonded to the sealing frame, although not shown.

  The spacer 130 is installed between the scanning line 113 formed on the inner surface of the back substrate 111 and the light shielding film (black matrix) 122 formed on the inner surface of the front substrate 121, and is adhered by a conductive adhesive. In FIG. 4, this bonded portion is indicated by a conductive adhesive layer 135. The distance between the back substrate and the front substrate is usually maintained at about 3 to 5 mm. Further, the spacer and the sealing frame are usually formed of glass, and frit glass is used as an adhesive for bonding them to the panel.

  The present invention is characterized in that a groove for inserting the spacer end portion is provided in the sealing frame, the spacer end portion is inserted therein, and the both are bonded and integrated with frit glass. This point will be described in detail with reference to FIGS. FIG. 1 shows an example in which a sealing frame with a spacer is manufactured and then bonded to a panel glass. As shown in FIG. 1B, a sealing frame 140 with a spacer 130 fixed thereto is produced. The sealing frame 140 is provided with a spacer end insertion groove 141 as shown in FIG. This groove has a width larger than the thickness of the spacer.

  By making the width of the groove larger than the thickness of the spacer, the spacer can be easily inserted into the groove. Further, the inner wall surface of the groove can be used for alignment of the spacer. By inserting the spacer end in accordance with one end face of the groove, the spacer can be accurately arranged at a predetermined position. If the wall of the groove is a vertical surface, the spacer can be disposed substantially perpendicular to the front panel and the rear panel, and the effect of reinforcing the strength of the spacer can be enhanced. Also, by increasing the width of the groove, even if the position of the groove at both ends of the spacer is slightly shifted, one end of the spacer is inserted in alignment with one surface of the groove of the sealing frame, and the other The position of the end can be adjusted within the groove of the other sealing frame, and the spacer can be accurately arranged at a predetermined position. Thus, by providing the spacer end insertion groove in the sealing frame and increasing the width of the groove, a specific effect that a part of the inner wall surface of the groove can be used for spacer alignment is expressed. .

  The spacer and the sealing frame can be joined by inserting the spacer end into the spacer end insertion groove 141, filling the groove 142 with an adhesive 142 such as frit glass, and heating. Bonding can also be performed by forming an adhesive layer on the inner surface of the spacer end insertion groove 141 by coating or the like, and inserting the spacer end portion into this groove and heating. Furthermore, an adhesive layer such as frit glass is formed on the end face of the spacer or the entire surface in the vicinity of the end of the spacer by a method such as coating, and after inserting into the spacer end insertion groove, the two are heated and bonded together. Can also be done.

  FIG. 1C shows a case in which after inserting the spacer end portion into the spacer end portion insertion groove 141, the groove 142 is filled with an adhesive 142 such as frit glass and bonded together. FIG. 1A shows an example in which frit glasses 160 and 170 are applied to the entire surface of the sealing frame with spacers previously integrated with the spacers and then joined to the back panel 110. In this example, the frit glasses 160 and 170 are formed on the entire surface of the sealing frame with spacers. However, the frit glasses 160 and 170 may be formed only on the portion to be bonded to the panel. A portion where the spacer and the sealing frame are bonded to the panel by the frit glasses 160 and 170 is the conductive adhesive layer 135 or the sealing adhesive layer 145 shown in FIGS.

  FIG. 2 shows a case where the spacer 130 is bonded to the sealing frame after the sealing frame 140 is bonded to the back panel 110. Here, a case where the frit glass 160 is formed on the entire surface of the sealing frame 140 is shown. If the sealing frame 140 is bonded to the back panel 110, the spacer 130 is inserted into the spacer end insertion groove 141. Then, the groove is filled with an adhesive 142 such as frit glass and heated to fix the spacer to the groove of the sealing frame. The fixing method can be variously changed as described above. In FIG. 2, it is inserted into the spacer end insertion groove 141 in a state in which the frosted glass 170 for bonding the spacer to the panel is formed on the surface in advance. However, even if the frit glass is formed after being fixed to the sealing frame. It doesn't matter. In FIG. 2, the spacer is fixed to the sealing frame after fixing the sealing frame 140 to the back panel 110, but the front panel and the sealing frame may be fixed first.

It is the schematic which showed an example of the spacer attachment structure to a sealing frame. It is the schematic which showed the other example of the spacer attachment structure to a sealing frame. It is a schematic block diagram of FED. It is sectional drawing which expanded and showed a part of FED.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 110 ... Back panel, 111 ... Back substrate, 112 ... Signal line, 113 ... Scanning line, 114 ... Electron source, 120 ... Front panel, 121 ... Front substrate, 122 ... Light shielding film (black matrix), 123 ... Anode, 124 ... Phosphor layer, 130 ... spacer, 135 ... conductive adhesive layer, 140 ... sealing frame, 141 ... spacer end insertion groove, 142 ... adhesive, 145 ... sealing adhesive layer, 150 ... display area, 160 ... frit glass 170 ... frit glass.

Claims (11)

  A back panel on which an electron source is formed, a front panel on which a phosphor that emits light upon receiving electrons emitted from the electron source is formed, and is disposed between the back panel and the front panel to support both substrates. A flat display device comprising a plurality of spacers and a sealing frame for hermetically sealing between the back panel and the front panel; a spacer end on the sealing frame in a direction in which the spacers are disposed; The groove is wider than the thickness of the spacer, and the end of the spacer is inserted in alignment with one end face of the groove, and the groove and the spacer are bonded. A flat display device characterized by being fixed by an agent.   2. The flat display device according to claim 1, wherein a bonding portion between the sealing frame and the spacer is electrically insulated.   2. The flat display device according to claim 1, wherein the adhesive is electrically insulating.   2. The flat surface according to claim 1, wherein both the sealing frame and the spacer are formed of glass, and an electrically insulating frit glass is interposed in a groove formed in the sealing frame. Type display device.   A plurality of spacers are disposed between a back panel on which an electron source is formed and a front panel on which a phosphor that emits light upon receiving electrons emitted from the electron source is formed, and the periphery of the back panel and the front panel In a method for manufacturing a flat display device in which a portion is sealed with a sealing frame, an insertion groove at a spacer end is formed in the sealing frame located in a direction in which the spacer is arranged, and the width of the groove is set to the spacer. A method of manufacturing a flat display device, wherein the spacer is inserted by aligning an end portion of the spacer with one end surface of the groove, and the groove and the spacer are fixed with an adhesive.   6. The flat type according to claim 5, wherein both end portions of the spacer are inserted into the groove of the sealing frame and fixed and integrated with the adhesive, and then joined to the back panel and the front panel. Manufacturing method of display device.   6. The method according to claim 5, wherein after the sealing frame is joined to one of the back panel and the front panel, the end of the spacer is inserted into the groove of the sealing frame to join them together. For manufacturing a flat display device.   6. The flat display according to claim 5, wherein an adhesive layer is provided on an inner surface of the groove of the sealing frame, and an end portion of the spacer is inserted into the groove to be joined to the sealing frame. Device manufacturing method.   6. The flat display according to claim 5, wherein an adhesive is applied to at least an end portion of the spacer, and the end portion of the spacer is inserted into a groove of the sealing frame to be joined to the sealing frame. Device manufacturing method.   In a sealing frame that is used in a flat display device in which a spacer is interposed between a back panel on which an electron source is formed and a front panel on which a phosphor is formed, and hermetically seals between the back panel and the front panel A flat display device sealing frame, comprising a groove into which an end of the spacer is inserted, wherein the width of the groove is larger than the thickness of the spacer.   In a flat display device in which a spacer is interposed between a back panel on which an electron source is formed and a front panel on which a phosphor is formed, a sealing frame for sealing between the back panel and the front panel, A groove into which the end of the spacer is inserted; the width of the groove is greater than the thickness of the spacer; the end of the spacer is inserted into alignment with one end surface of the groove; A sealing frame with a spacer, wherein the frame is joined and integrated with an adhesive.

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